Journal articles: 'Slurry pump'

1

Sun, Shilong, Peter W. Tse, and Y. L. Tse. "An Enhanced Factor Analysis of Performance Degradation Assessment on Slurry Pump Impellers." Shock and Vibration 2017 (2017): 1–13. http://dx.doi.org/10.1155/2017/1524840.

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Slurry pumps, such as oil sand pumps, are widely used in industry to convert electrical energy to slurry potential and kinetic energy. Because of adverse working conditions, slurry pump impellers are prone to suffer wear, which may result in slurry pump breakdowns. To prevent any unexpected breakdowns, slurry pump impeller performance degradation assessment should be immediately conducted to monitor the current health condition and to ensure the safety and reliability of slurry pumps. In this paper, to provide an alternative to the impeller health indicator, an enhanced factor analysis based impeller indicator (EFABII) is proposed. Firstly, a low-pass filter is employed to improve the signal to noise ratios of slurry pump vibration signals. Secondly, redundant statistical features are extracted from the filtered vibration signals. To reduce the redundancy of the statistic features, the enhanced factor analysis is performed to generate new statistical features. Moreover, the statistic features can be automatically grouped and developed a new indicator called EFABII. Data collected from industrial oil sand pumps are used to validate the effectiveness of the proposed method. The results show that the proposed method is able to track the current health condition of slurry pump impellers.

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Mrinal, KR, and Abdus Samad. "Performance prediction of kinetic and screw pumps delivering slurry." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 7 (March 22, 2018): 898–911. http://dx.doi.org/10.1177/0957650918760161.

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Transporting slurry is a difficult task and industries use a kinetic or centrifugal pump or a screw or progressive cavity pump to deliver it. On the other hand, approximation models can help predicting performance and avoiding the expensive experiments of pumps with slurries. In this work, bentonite-based slurries were prepared and pumped by a centrifugal pump and a progressive cavity pump. The experimental facilities were developed in-house and artificial neural network-based approximation models were developed to predict performances. The approximation models say that it can eliminate the expensive testing to draw performance curve a pump. The relative merits of the pumps show that the progressive cavity pump has a better capability to handle the slurries or high viscosity fluids.

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Noon, Adnan Aslam, Absaar Ul Jabbar, Hasan Koten, Man-Hoe Kim, Hafiz Waqar Ahmed, Umair Mueed, Ahmad Adnan Shoukat, and Bilal Anwar. "Strive to Reduce Slurry Erosion and Cavitation in Pumps through Flow Modifications, Design Optimization and Some Other Techniques: Long Term Impact on Process Industry." Materials 14, no. 3 (January 21, 2021): 521. http://dx.doi.org/10.3390/ma14030521.

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Centrifugal pumps are being widely used in various industries for moving fluids that carry solids through pipelines where the need of head and flow rate is not high. Slurry erosion and cavitation are an extremely complex and not yet fully understood phenomenon that occur in centrifugal pumps; however, these undesirable phenomena can be reduced to a certain extent. Appropriate design and development of experiments is required to reasonably predict slurry erosion and cavitation. However, CFD methodology complements analytical solutions and experiments whenever testing of equipment has limitations. The current paper highlights the various slurry erosion and cavitation reduction techniques utilized by different researchers. Economic analysis conducted for a case study relevant to centrifugal pump (CP) usage in Pakistan shows that an 8% enhancement in pump efficiency can reduce the life cycle cost to about 17.6%, which could save up to USD 4281 for a single pump annually in Pakistan.

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Zhang, Qihua, Shun Kang, Zhiang Xie, Li Cao, Zhaoxu Yan, and Weidong Zhang. "Pulp pumping efficiency II – Designing of a pulp pump." Nordic Pulp & Paper Research Journal 36, no. 2 (March 4, 2021): 265–75. http://dx.doi.org/10.1515/npprj-2021-2008.

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Abstract Based on the loss model of pulp pump set up in the I part of this research, an efficient designing method is proposed by taking account of the influences of head reduction by small blade number, leakage loss via tip clearance, and erosion-corrosion wears in pumps separately. Further, a two-stage optimal designing approach was proposed to tackle the oversized design. The pump designing was performed by coupling with a CFD-based optimization procedure. An efficiency increase of near 10 % was achieved on the pump model validated in laboratory. It was proved that performance could be improved by increasing the impeller blade width and enlarging the impeller blade outlet angle. It was further shown that the erosion-corrosion wear in pulp pump was relatively lighter when compared to particle-impingement wear in slurry and sewage pump. Adoption of composite material showed potential in energy-saving in the pumping system.

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Deng, Liwen, Qiong Hu, Jun Chen, Yajuan Kang, and Shaojun Liu. "Particle Distribution and Motion in Six-Stage Centrifugal Pump by Means of Slurry Experiment and CFD-DEM Simulation." Journal of Marine Science and Engineering 9, no. 7 (June 29, 2021): 716. http://dx.doi.org/10.3390/jmse9070716.

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Six-stage centrifugal pumps are used in deep-sea mining lifting systems and are required to convey slurry containing coarse particles. A six-stage centrifugal pump suitable for operation in a natural mining system was manufactured. High-flow and full-scaled slurry conveying experiments at a 5% and 9% volume concentration of particles was carried out at a large modified test site with artificial nodules. CFD-DEM simulations were carried out to obtain slurry transport characteristic curves, particle transport and distribution characteristics, where the simulation method was validated by the experiment data. A clarified two-stage pump can be used instead of a multi-stage pump for simplified simulation calculations with acceptable accuracy. Local agglomeration of particles caused by backflow was found at the outlet of the diffuser, and such agglomeration decreased with increasing flow rates. It was found that particles are transported non-uniformly, particles transport in diffusers in strands. Particles are transported in a pulse-like mode within the pump, with the latter stage showing similar particle characteristics to those transported in the previous pump stage.

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6

He, Peng Cheng, and Peng Yun Song. "A Simple Correlation Equation to Predict Pump Performance for Slurry." Applied Mechanics and Materials 365-366 (August 2013): 365–69. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.365.

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As to the centrifugal pump for slurry, the effects of solids particles on the performance of the pump have been extensively researched. It is essential to understand the effects of solids on the pump performance well in order to obtain the performance of centrifugal pump for handling slurries. Some existing correlation equations to predict the performance are analyzed and summarized in this paper. A new simple correlation equation to predict the head ratio for pumps handling solids has been developed. The simple equation has been validated by the experiment data published in the related literature. The results by the simple equation are compared with ones available in the literature. The result shows that the simple equation is in good agreement with the experimental data, and it can be used to predict the performance of centrifugal pump for slurry.

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Stehr, Gunther C., Ariunbolor Purvee, and Battsengel Baatar. "Characterization of Substrate Materials of Pump Parts and Copper Ore Slurry from a Mongolian Mining Site." Solid State Phenomena 323 (August 30, 2021): 76–86. http://dx.doi.org/10.4028/www.scientific.net/ssp.323.76.

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Slurry pumps are used to move and lift a mixture of copper ore and water at mineral processing plants. However, in the process, the pumps wear out at a high rate, which is costly and time consuming. This paper is a characterization of the chemical composition, microstructure, and hardness of samples from a copper ore mining company’s slurry pump and gravel material. With this information, studies using new technology and cladding materials can then be conducted, to compare and select the most effective treatment of the slurry pump’s surfaces to increase its operational lifetime.

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8

Zhao, He Yong, Shao Guang Liu, Yun Sang Feng, Ji Peng Yao, and Yu Song Xu. "Failure Analysis of Desulfurization Slurry Circulating Pump and HVOF Coating Protection Technology Progress." Applied Mechanics and Materials 320 (May 2013): 374–82. http://dx.doi.org/10.4028/www.scientific.net/amm.320.374.

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Failure form and erosion-corrosive mechanism of desulfurization slurry circulating pump were analyzed comprehensively, its protection status and HVOF spraying protection technology research were discussed, the technical characteristics and good prospects of HVOF applied in the slurry circulating pump were pointed out in this paper.Keywords: Desulfurization, Slurry circulating pump, Erosion, Corrosion, HVOF

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9

Ridgway, N., C. B. Colby, and B. K. O’Neill. "Slurry pump gland seal wear." Tribology International 42, no. 11-12 (December 2009): 1715–21. http://dx.doi.org/10.1016/j.triboint.2009.04.047.

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Bonner, Chuck. "Selecting the right slurry pump." World Pumps 2006, no. 473 (February 2006): 30–33. http://dx.doi.org/10.1016/s0262-1762(06)70912-9.

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11

Zhao, Xue Song, Jian Hu, and Pei Cheng Shi. "The Research of Anti-Slip Control for Slurry Pump Based on PLC." Advanced Materials Research 732-733 (August 2013): 501–6. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.501.

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The research of anti-slip control for slurry pump is to prevent the cavitation of pump,protect flow passage components of pump from cavitation corrosion.Through the analysis,the size of the inlet velocity is regarded as the characterization whether pump cavitation.Calculate the five kinds of inlet velocity when the slurry pump is in the normal work, make the procedure is versatility. PLC programs are compiled and imported into hydraulic-pneumatic experimental platform,experimental platform simulates the results of pump system is accord with anti-slip control requirements.The program is used in slurry pump avoids the occurrence of cavitation phenomenon and simplifies the complicated site operation.

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12

Spiridonov, E. К., G. G. Yakubov, and D. F. Khabarova. "HYDROJET EJECTION HYDROMETER OF BULK MATERIALS. WORKFLOW AND CHARACTERISTICS." Bulletin of the South Ural State University series "Mechanical Engineering Industry" 20, no. 1 (2020): 47–54. http://dx.doi.org/10.14529/engin200106.

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Among hydrodynamic machines, jet pumps are among the most common. The high demand for this type of pump is due to their following features: the absence of moving parts and the simplicity of the device, small overall dimensions and weight, high self-priming ability, the ability to pump aggressive media and hydraulic mixtures containing solid impurities. In the hydromechanical method of developing deposits of building materials (sand, gravel, etc.), jet pumps – hydraulic elevators are used for underwater mining and transportation of bulk materials to the sorting plant, and after classification of the sand-gravel mixture – hydraulic transport of sand and gravel to dumps through pipelines. With this method of laying the finished product, the jet pump creates a static pressure of the hydraulic mixture, sufficient for its transport to the dump. However, another way of laying the finished product in dumps is also possible – through the air with a slurry stream. In this case, the jet pump performs the function of a hydrometer – a device for creating a high-speed slurry jet. A review of the literatureshowed that this mode of operation of the jet pump was not investigated. The effective operation of the jet pump-hydrometer depends on the ratio of the areas of the outlet section of the nozzle and the normal section of the mixing chamber, the relative density of the slurry in the input hopper. For each value of the relative density of the slurry, there is an optimal ratio of the areas of the nozzle and the chamber at which the specific energy consumption of the active stream will be minimal. The aim of this work is to determine and analyze the characteristics of an ejection hydrometer and to identify the most effective modes of its operation.

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13

Korzhev, Alexander, Olga Bolshunova, Irina Voytyuk, and Anna Vatlina. "Mathematical simulation of transient operation modes of an electric drive of a centrifugal pump for a slurry pipeline." E3S Web of Conferences 140 (2019): 04012. http://dx.doi.org/10.1051/e3sconf/201914004012.

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To develop new control algorithms for controlling slurry pumps, it is necessary to have a reliable mathematical model of their operation, convenient for computer simulation implementation. Therefore, the paper discloses a mathematical model of the joint operation of a centrifugal pump with a controlled asynchronous motor drive and a slurry pipeline. The results of transient modes computer simulation, carried out via the xcos application of the scilab software, are presented. This software is a freeware one and, therefore, available free of charge to most researchers. The paper provides an example of verification of the adequacy and performance of the proposed computer model, with the use of characteristics of the centrifugal slurry pump GrAT-225-67-3-2-2. The said model of a centrifugal pump is efficient and can be used during the study of dynamic processes in pipeline transportation systems, as well as in the synthesis of control algorithms for electric drives of pumping units.

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14

Tse, Peter W., and Dong Wang. "Enhancing the abilities in assessing slurry pumps' performance degradation and estimating their remaining useful lives by using captured vibration signals." Journal of Vibration and Control 23, no. 12 (September 9, 2015): 1925–37. http://dx.doi.org/10.1177/1077546315604522.

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Slurry pumps are widely used to transport abrasive slurry that contains oil and sands. Because of the abrasive nature, the impellers inside the pumps wear easily. Severe impeller wear may cause unexpected pump failure that leads to substantial oil production loss. To assess the impeller performance degradation and then estimate its remaining useful life (RUL), an efficient prognostic method has been designed. For assessing the impeller performance degradation, statistical features were extracted from vibration signals collected from on-site operating slurry pumps. Their corresponding frequency spectra were generated after the vibration signals were processed by a low-pass filter. Here, the low-pass filter aims to retain impeller-related vibration components, such as the pump vane-passing frequency and its harmonics. Principal component analysis was then applied to reduce the dimensionality of the extracted statistical features to one dimensionality, which was used to construct a health indicator to reflect the health evolution of the impeller over time. For estimating the impeller's RUL, a nonlinear state space model was designed to track its temporal health indicator. An efficient unscented transform method was employed to iteratively estimate the joint posterior probability density function of the parameters of the nonlinear state space model. After the proper nonlinear state space model had been determined, extrapolations of the nonlinear state space model to a specified alert threshold were used to estimate the impeller's RUL. Vibration signals captured from on-site operating slurry pumps were used to verify the effectiveness of the proposed prognostic method. The results show that prediction accuracy of the estimated RULs have been improved as compared to those generated by other recently developed slurry pump prognostic methods. Moreover, the more the temporal vibration data is available, the better the performance of the state space model; hence, the higher the accuracy in predicting the impeller's RUL.

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15

Gandhi, B. K., S. N. Singh, and V. Seshadri. "Performance Characteristics of Centrifugal Slurry Pumps." Journal of Fluids Engineering 123, no. 2 (January 31, 2001): 271–80. http://dx.doi.org/10.1115/1.1366322.

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The performance of two centrifugal slurry pumps has been reported for three solid materials having different particle size distribution (PSD) in terms of head, capacity, and power characteristics. The results have shown that the values of head and efficiency ratios are not only dependent on solid concentration but are also affected by PSD of the solids and properties of the slurry. The addition of fine particles in the slurry of coarser material leads to reduction in the additional losses that occur in the pumps due to the presence of solids. It is also observed that with the increase in the pump size, the additional losses due to presence of solids reduce.

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Vasileiou, G., N. Rogkas, S. Tsolakis, V. Spitas, and P. Zalimidis. "Design of a new-concept conical positive displacement slurry pump for continuous de-clogging." MATEC Web of Conferences 287 (2019): 01017. http://dx.doi.org/10.1051/matecconf/201928701017.

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Slurry pumps are extensively used in the construction industry while positive displacement screw pumps are used in most mobile concrete pump applications. The aggregate size is known to significantly affect pump performance in terms of clogging. Large aggregates tend to be trapped against the stator-rotor interface, blocking the continuous and smooth operation of the screw pump. In order to avoid the development of excessive stress values able to damage the rotor-stator mechanism of the pump, the typical de-clogging mechanism deployed by most positive displacement screw slurry pumps includes reversing the rotation of the pump driving motor thus allowing the aggregates to be carried away with the mixture, so that the pump can soon resume its operation. This procedure causes frequent start-stops of the pump resulting in dis-continuation of the pumped mixture lasting a few seconds, that while being of little importance in most construction applications, can be of significance in applications requiring higher levels of accuracy and continuous mixture flow. In the context of this work, a novel concept of positive displacement screw slurry pump is presented, including a continuous de-clogging mechanism, without the need to reverse the rotation of the driving motor. This de-clogging operation is achieved through the modification of the geometry of both the rotor and stator introducing a conical form along the axial direction. This configuration of the rotor-stator, allows for small displacements along the axial direction, which in turn increases the size of the cavities facilitating the de-clogging of the pump. Variable pitch is also introduced to both the rotor and stator in order to ensure constant mass flow of the mixture throughout the length of the screw pump covering for the velocity increase as a result of the conical geometry. The axial movement of the rotor in relation to the fixed stator, is achieved through the elastic support of the rotor in the axial direction, that allows for small axial displacements, when stresses induced from trapped aggregates exceed the stiffness of the support. The proposed concept comprises a passive real-time de-clogging mechanism that greatly reduces pump idle time compared to the conventional mechanism described earlier, providing smoother operation and stable mass flow of the mixture.

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17

Su, Xianghui, Zhenji Tang, Yi Li, Zuchao Zhu, Kamila Mianowicz, and Peter Balaz. "Research of Particle Motion in a Two-Stage Slurry Transport Pump for Deep-Ocean Mining by the CFD-DEM Method." Energies 13, no. 24 (December 19, 2020): 6711. http://dx.doi.org/10.3390/en13246711.

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The slurry transport pump is the key equipment of deep-ocean mining systems. The motion law of coarse particles in the pump is not clear enough. In this paper, a hydraulic model of a laboratory-scale two-stage slurry transport pump is constructed, and the motion characteristics of coarse particles in the pump are numerically studied by using the computational fluid dynamics–discrete element method (CFD-DEM) method. The performance curve of the pump is obtained by experimental measurement, and the reliability of the calculated results is verified. Due to the application of the amplification flow rate design method, the optimum efficiency point of the pump is shifted to the large flow rate condition. Differences in particle swarm within two stages are compared. The position distribution, velocity variation and trajectory of particles in the impeller and bowl diffuser are studied in detail. The velocity of particles leaving the impeller depends on whether they collide with the impeller blade. The motion of particles in the bowl diffuser is divided into three periods. Collision between particles and blades in the bowl diffuser not only leads to energy loss but also gradually transforms the circumferential velocity of particles into axial velocity in the second period. This work can provide a reference for the study of wear and blockage prevention of slurry transport pumps.

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Sheth, K. K., G. L. Morrison, and W. W. Peng. "Slip Factors of Centrifugal Slurry Pumps." Journal of Fluids Engineering 109, no. 3 (September 1, 1987): 313–18. http://dx.doi.org/10.1115/1.3242666.

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Experiments have been carried out in order to determine the effects on slip factor due to the various parameters affecting the performance characteristics of a centrifugal slurry pump. The experiments were conducted with water, sand slurry, and a glass bead slurry at three different pump speeds. Measurements of power, flow rate, head developed by the pump and the density of the slurry were made in order to obtain the characteristic curves of the pump. Using Euler’s equation, equations were derived for calculating the slip and friction factors of the flow. The deduced slip factors for centrifugal slurry pump can be correlated well with suggested non dimensional groups. It shows a consistent trend of decreasing slip factor with increasing slurry mixture density and impeller rotation, or with a decreasing through flow rate. The sizes of the sand and glass bead particles are significantly different (0.71 mm versus 0.09 mm), however, the data correlations do not suggest its effect on the slip factors significantly as the other parameters. The slip factors deduced from head-flow rate curves are more reliable than those deduced from power-flow rate curves, since the shut-off power measurements are likely subjected to errors associated with the particles settling, or the transient effect if the measurements are taken momentarily.

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19

Meakhail, Tarek, and Ibrahim Teaima. "Experimental and numerical studies of the effect of area ratio and driving pressure on the performance of water and slurry jet pumps." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, no. 9 (November 29, 2011): 2250–66. http://dx.doi.org/10.1177/0954406211430458.

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The slurry jet pump with scouring nozzle system can be used in dredging of sites, which are difficult to access or need handling of equipments that are used for the intake of pumping stations under bridges and concrete water channels. This system is suitable for sand, silt, sludge, mud, and other organic materials. The aim of this study is to investigate the performance of water and slurry jet pumps. The effects of the pump-operating conditions and geometries on its performance were investigated. The experimental rig was constructed in such a way that the driving nozzle diameter can be changed. In this study, three different diameters of driving nozzles, 10, 12.7, and 16 mm, have been used with one mixing chamber of 25.4 mm diameter (i.e. three different area ratios of R = 0.155, 0.25, and 0.4). Also, the effect of driving pressure has been investigated. The results show that increasing the area ratio decreases the maximum mass flow ratio. The results of computational fluid dynamics were found to agree well with actual values obtained from the experimental water and slurry jet pump.

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Yahya Bajawi, Hawas, Basharat Salim, and Ziyadh Suhibani. "Performance of a Centrifugal Slurry Pump." Research Journal of Applied Sciences, Engineering and Technology 7, no. 8 (February 27, 2014): 1573–81. http://dx.doi.org/10.19026/rjaset.7.434.

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Li, Jiayi. "Process Design of Microalgae Slurry Pump." Trends in Renewable Energy 6, no. 3 (July 2020): 234–44. http://dx.doi.org/10.17737/tre.2020.6.3.00120.

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Engin, Tahsin, and Mesut Gur. "Comparative Evaluation of Some Existing Correlations to Predict Head Degradation of Centrifugal Slurry Pumps." Journal of Fluids Engineering 125, no. 1 (January 1, 2003): 149–57. http://dx.doi.org/10.1115/1.1523065.

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In order to optimally design a slurry transportation system, it is necessary to know how the presence of solids will change the performance of the slurry pump to be installed. This paper makes the comparison of some existing correlations available in the literature to predict the head reduction factors of such centrifugal pumps handling slurries. For this purpose, a large number of published data for various centrifugal slurry pump tests in the literature have been used to develop a new correlation and then this correlation and all others have been tested against the data. For the proposed correlation, the mean and average deviations between the calculated and measured head reduction factor is 8.378 and 0.620%, respectively, for all data of mostly handling commercial slurries. It also produces 12.441% mean deviation in the prediction of efficiency ratio for 216 data points. Overall, the new correlation that can be applied to both metal and rubber lined pumps with impeller diameter up to 850 mm, gives remarkably closer fit to the published data of both head and efficiency ratios than all existing correlations.

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Roco, M. C., P. Nair, and G. R. Addie. "Casing Headloss in Centrifugal Slurry Pumps." Journal of Fluids Engineering 108, no. 4 (December 1, 1986): 453–64. http://dx.doi.org/10.1115/1.3242603.

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The headlosses in slurry pump casings are caused by the energy dissipation in the flowing liquid-solid mixture, and the particle-casing wall interaction. This paper presents a quasi-three-dimensional flow analysis, in two steps: (1) the casing width-averaged parameters are obtained from the two-dimensional flow simulation in a normal plane to the pump axis, (2) the results are then used for flow computation in the casing radial cross-sections. The governing equations are averaged over the typical time interval for the periodic flow in the casing caused by the finite number of impeller blades. Finite element techniques with linear three-node and quadratic nine-node elements are used in the numerical simulation. The effect of the casing shape on the headlosses is illustrated by comparing the performances of three centrifugal slurry pumps with quasi-spiral, semi-annular and annular casings at various flowrates. The flow recirculated between the casing tongue and impeller shrouds is shown to play a major role in the overall headloss. The flow results may also be used for determining the wear in the casing and thrust on the impeller, as well as for optimizing the casing dimensions.

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Tao, Yi, Yongming Bai, and Yingchun Wu. "Influence of Blade Thickness on Solid–Liquid Two-Phase Flow and Impeller Wear in a Ceramic Centrifugal Slurry Pump." Processes 9, no. 8 (July 21, 2021): 1259. http://dx.doi.org/10.3390/pr9081259.

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The impeller blades of ceramic slurry pumps are usually very thick for the purpose of prolonging the service life. In this paper, numerical simulations and wear test were conducted to investigate the influence of blade thickness on the solid–liquid two-phase flow and impeller wear in a ceramic centrifugal slurry pump. The wear test was conducted for CFD validation. The numerical results show that the incident angles of solid particles increase with increasing blade thickness, which results in larger wrap angles of the solid particle trajectories. The increasing wrap angles of the solid particle trajectories offset the region that the collisions between the blade pressure side and the solid particles side take place towards the impeller exit and lead to more impacts between the solid particles and the blade suction side. The numerical results are in good accordance with the wear pattern of the tested impellers, which demonstrates that the numerical method adopted in this paper is predictable in the abrasion of the impeller of a ceramic centrifugal slurry pump. The experimental results show that an increase in the blade thickness alleviates the abrasion of the leading edges and the pressure side of the impeller blades; however, it also aggravates the abrasion of the blade suction side and decreases the pump performance.

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Ling, Xue Qin, Wei Zhang, and Yang Chen. "Numerical Simulation of Suction Valve Internal Flow Field of Large Scale Diaphragm Pump Fluid End Based on ADINA." Advanced Materials Research 706-708 (June 2013): 1458–61. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1458.

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Suction valve is a critical and vulnerable component in fluid end of large scale diaphragm pump. Slurry flowing state in suction valve affects transport efficiency and operational life span of diaphragm pump directly. It is necessary to analyze internal flow field of suction valve for confirming structural factors which affect flowing state of slurry. In this paper, suction valve of three-cylinder single-acting diaphragm pumps as a research subject, internal flow fields of suction valves which have different structures are simulated by finite element analysis software ADINA. Velocity distribution graphs and vector graphs of flow field can be obtained from analysis results. Flowing characteristic regulations affected by inner structure of valve are summarized. The research results in the paper provide some theoretical guidance for researching and developing of suction valves and relevant products.

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P.N. Ulhe, Vishwatesh Raj,. "Review Paper on CFD Modelling and Simulation of slurry through Centrifugal Pump." International Journal Of Mechanical Engineering And Information Technology 05, no. 05 (May 23, 2017): 1588–95. http://dx.doi.org/10.18535/ijmeit/v5i5.01.

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Chen, Hanxin, Wenjian Huang, Jinmin Huang, Chenghao Cao, Liu Yang, Yibin He, and Li Zeng. "Multi-fault Condition Monitoring of Slurry Pump with Principle Component Analysis and Sequential Hypothesis Test." International Journal of Pattern Recognition and Artificial Intelligence 34, no. 07 (October 11, 2019): 2059019. http://dx.doi.org/10.1142/s0218001420590193.

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A new method about the multi-fault condition monitoring of slurry pump based on principal component analysis (PCA) and sequential probability ratio test (SPRT) is proposed. The method identifies the condition of the slurry pump by analyzing the vibration signal. The experimental model is established using the normal impeller and the faulty impellers where the collected vibration signals were preprocessed using wavelet packet transform (WPT). The characteristic parameters of the vibration signals are extracted by time domain signal analysis and the dimension of data was reduced by PCA. The principal components with the largest contribution rate are chosen as the inputted signal to SPRT to assess the proposed algorithm. The new methodology is reasonable and practical for the multi-fault diagnosis of slurry pump.

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Luo, Xian Wu, Hong Yuan Xu, Juan Liu, and Long Hao Qi. "Abrasive Erosion Comparison for a Ceramics and a High Chrome Cast Iron Applied in a Slurry Pump." Key Engineering Materials 368-372 (February 2008): 894–97. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.894.

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Slurry pumps are used to transport the liquid fluids with solid particles in the industries. The materials of flow passage in a slurry pump are subjected to severe damage due to abrasive erosion. This paper compares the abrasive erosion for an engineering ceramics i.e. hot pressed Si3N4 ceramics and a high chrome cast iron i.e. Cr26 by laboratory test and industrial operation. The results indicate that the erosion rate of Cr26 is much larger than that of hot pressed Si3N4 ceramics under the same test conditions. That indicates that the engineering ceramics is a promising alternation of the expensive material such as Cr26 in the application of slurry pumps. It is noted that the erosion pattern such as scale ripple has the similar features for both materials, even the hardness of hot pressed Si3N4 ceramics is much higher than Cr26. Further, the scale ripple is suspected to be originated from the relatively weak grain boundary and enhanced by cavitation.

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Iwai, Yoshiro, and Kazuyuki Nambu. "Slurry wear properties of pump lining materials." Wear 210, no. 1-2 (September 1997): 211–19. http://dx.doi.org/10.1016/s0043-1648(97)00055-0.

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Batalović, Veselin. "Erosive Wear Model of Slurry Pump Impeller." Journal of Tribology 132, no. 2 (2010): 021602. http://dx.doi.org/10.1115/1.4001167.

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Khalid, Y. A., and S. M. Sapuan. "Wear analysis of centrifugal slurry pump impellers." Industrial Lubrication and Tribology 59, no. 1 (February 13, 2007): 18–28. http://dx.doi.org/10.1108/00368790710723106.

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Cader, T., O. Masbernat, and M. C. Roco. "LDV Measurements in a Centrifugal Slurry Pump: Water and Dilute Slurry Flows." Journal of Fluids Engineering 114, no. 4 (December 1, 1992): 606–15. http://dx.doi.org/10.1115/1.2910074.

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A two-component LDV system was used to investigate single and two-phase flow in a representative section at the impeller outlet of a centrifugal slurry pump. Measurements were performed at Qn and 0.5 Qn with water and dilute slurry flows (C = 0.04 and 0.16 percent by volume). The solids consist of 0.8 mm glass beads. Particle Reynolds number is 65. The point liquid and solid velocities were determined with a Doppler signal amplitude discrimination approach. A rotary shaft encoder was used to represent the velocity as a function of the impeller angular position, and to investigate the effect of a finite number of blades on the flow. The data on liquid and slip velocity distributions show large scale flow structures which dominate the two-phase turbulent flow. Overall, solid particles have a larger radial velocity than the carrier fluid at the impeller outlet, but they lag the fluid in the circumferential direction.

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33

Cai, Tian Fu, Jian Zhong Zhou, Xue Min Wu, Wei Ping Peng, and Xu Wu. "Monitor System for Automatic Grouting of Metamorphic Concrete Based on PLC and HMI." Applied Mechanics and Materials 365-366 (August 2013): 662–65. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.662.

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According to lower efficiency, non-uniform distribution and metering difficulty in grouting, this paper describes the development of monitor system for automatic grouting of metamorphic concrete. Based on PLC and HMI, it uses the knowledge of signal acquisition and hydraulic control technology. This system calculates the rotation division angle to measure the amount of grouting through the hall-switch installed on the rotor of slurry pump. The PLC will realize signal acquisition, slurry metering, and effectively control of the slurry pump by solenoid valves and hydraulic motor. In addition, the HMI provides the functions such as parameters setting, operation controlling and data displaying.

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34

Rayan, M. A., and M. Shawky. "Evaluation of Wear in a Centrifugal Slurry Pump." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power Engineering 203, no. 1 (February 1989): 19–23. http://dx.doi.org/10.1243/pime_proc_1989_203_003_02.

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This paper presents some experimental results of erosive wear in a centrifugal slurry pump. The erosion rate of a centrifugal pump impeller is measured by the weighing method. In this part of the study only the erosion of the impeller is considered. Two different concentrations of coarse sand are used. The effect of speed of rotation is also investigated. The experimental results show the correlation between the erosive wear development, and solid particle concentration. The objective of this investigation is to study the relation between erosive wear in a centrifugal pump impeller and solid particle concentration.

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35

Singh, Jashanpreet, Satish Kumar, and SK Mohapatra. "Study on role of particle shape in erosion wear of austenitic steel using image processing analysis technique." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 5 (August 20, 2018): 712–25. http://dx.doi.org/10.1177/1350650118794698.

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Properties of flowing media (e.g. such as fly ash, bottom ash, coal, mineral tailings, sand slurries, etc.) play a crucial role in the service life of centrifugal slurry pump components. Generally, these solid particles vary in shape and size. In literature, a limited number of studies have been carried out to investigate the influence of particle size and shape on erosion wear. Stainless steel (SS 316L) is the most commonly used material for the fabrication of slurry pump components namely, casing, impeller, shafts, and sealing columns. In the present study, the influence of particle type and circularity factor on erosion wear of austenitic steel has been studied. A slurry pot tester (Ducom TR-41) was used to perform the experiments that established the erosion wear of slurry pump austenitic steel under the influence of the parameters noted above. Abrasives used in the current study are fly ash, bottom ash, and sand. Surface smoothness, circularity factor, coefficient of variance, sphericity, and solidity of solid particles were also analyzed prior to performing the experiments. The circularity factor value and erosion wear rate hold a power law relationship. Three-dimensional surface plots were plotted to explain the underlying mechanism of erosion wear.

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36

Li, Shou-Ren, Takashi Itoh, Akio Ihara, Masayoshi Itoh, and Risaburo Oba. "Pulp Fluidization and Limited Consistency for Operating the MC-Centrifugal Slurry Pump." Transactions of the Japan Society of Mechanical Engineers Series B 60, no. 580 (1994): 4132–37. http://dx.doi.org/10.1299/kikaib.60.4132.

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37

Carlomagno, Giovanni M. "Development of an Integrated System for the Automatic Viscosity Correction of a Ceramic Slurry for the Investment Casting Process." Recent Patents on Mechanical Engineering 12, no. 3 (September 26, 2019): 211–19. http://dx.doi.org/10.2174/2212797612666190520073144.

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Background: Starting from a wax model of the mold, which is later discarded, investment casting is used to make almost finished metal cast parts. The term "investment casting" is derived from the use of a ceramic liquid mixture (slurry), in which the model is repeatedly immersed (invested) to form, layer by layer, the shell which has to be filled with molten metal. The liquid of the slurry tends to evaporate so that the viscosity of the former increases and a correction is needed. Objective: The study aimed to investigate the simplest way to measure slurry viscosity and automatically correct it. Methods: Numerical and experimental tests have been implemented to correctly assess the proposed method. An integrated system for the automatic correction of slurry viscosity is realised which comprises: a reservoir of slurry including means for mixing it; a transducer which continuously measures the slurry viscosity; a pump that gradually feeds the diluent into the slurry to keep its viscosity constant; and a device, governed by the continuous viscosity measurement, that operates the pump. Results: It has been proved that the developed system is able to integrate the slurry viscosity continuous measurement with gradual addition of diluent into the slurry, so as to have a fully automated operation that can make corrections, whenever necessary, on the basis of the transducer output. Conclusion: The developed system works properly by keeping the slurry viscosity within a fixed range. A patent has been recently deposited to protect the integrated system for the automatic correction of slurry viscosity.

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38

Minett, Steve. "The birth of an integrated slurry pump range." World Pumps 1998, no. 383 (August 1998): 44–46. http://dx.doi.org/10.1016/s0262-1762(99)80425-8.

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F. Khalil, Mohamed, Sadek Z. Kassab, Ahmed A. Abdel Naby, and A. Azouz. "Performance Characteristics of Centrifugal Pump Conveying Soft Slurry." American Journal of Mechanical Engineering 1, no. 5 (July 16, 2013): 103–12. http://dx.doi.org/10.12691/ajme-1-5-1.

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Cader, T., O. Masbernat, and M. C. Roco. "Two-Phase Velocity Distributions and Overall Performance of a Centrifugal Slurry Pump." Journal of Fluids Engineering 116, no. 2 (June 1, 1994): 316–23. http://dx.doi.org/10.1115/1.2910274.

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Back-scattering LDV has been used to investigate particulate two-phase flow in a centrifugal slurry pump. The measurements reported here have been made with a dilute suspension of 0.8 mm glass beads at the impeller-casing flow interface. This interface is of practical importance because the corresponding velocity and concentration results can be used to determine the pump head and flowrate. The present study evaluates the connection between the liquid and solids velocity distribution measured around the impeller and the pump performance determined from measurements at the pump inlet and outlet. The analysis of the velocity triangles for both phases shows the effect of the pump flowrate and inlet recirculation on the pump head at the impeller outlet, as well as the effect of particle slip on pump energy efficiency. A separate group of characteristic curves is proposed to represent the periodical fluctuations of the pump flowrate, head, and loss of efficiency due to particle slip, as a function of the impeller position.

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Alawadhi, Khaled, Bashar Alzuwayer, Tareq Ali Mohammad, and Mohammad H. Buhemdi. "Design and Optimization of a Centrifugal Pump for Slurry Transport Using the Response Surface Method." Machines 9, no. 3 (March 13, 2021): 60. http://dx.doi.org/10.3390/machines9030060.

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Since centrifugal pumps consume a mammoth amount of energy in various industrial applications, their design and optimization are highly relevant to saving maximum energy and increasing the system’s efficiency. In the current investigation, a centrifugal pump has been designed and optimized. The study has been carried out for the specific application of transportation of slurry at a flow rate of 120 m3/hr to a head of 20 m. For the optimization process, a multi-objective genetic algorithm (MOGA) and response surface methodology (RSM) have been employed. The process is based on the mean line design of the pump. It utilizes six geometric parameters as design variables, i.e., number of vanes, inlet beta shroud, exit beta shroud, hub inlet blade draft, Rake angle, and the impeller’s rotational speed. The objective functions employed are pump power, hydraulic efficiency, volumetric efficiency, and pump efficiency. In this reference, five different software packages, i.e., ANSYS Vista, ANSYS DesignModeler, response surface optimization software, and ANSYS CFX, were coupled to achieve the optimized design of the pump geometry. Characteristic maps were generated using simulations conducted for 45 points. Additionally, erosion rate was predicted using 3-D numerical simulations under various conditions. Finally, the transient behavior of the pump, being the highlight of the study, was evaluated. Results suggest that the maximum fluctuation in the local pressure and stresses on the cases correspond to a phase angle of 0°–30° of the casing that in turn corresponds to the maximum erosion rates in the region.

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42

Kazim, K. A., B. Maiti, and P. Chand. "A correlation to predict the performance characteristics of centrifugal pumps handling slurries." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 211, no. 2 (March 1, 1997): 147–57. http://dx.doi.org/10.1243/0957650971537060.

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Centrifugal pumps are being used increasingly for transportation of slurries through pipelines. To design a slurry handling system it is essential to have a knowledge of the effects of suspended solids on the pump performance. A new correlation to predict the head reduction factor for centrifugal pumps handling solids has been developed. This correlation takes into account the individual effect of particle size, particle size distribution, specific gravity and concentration of solids on the centrifugal pump performance characteristics. The range of validity of the correlation has been verified by experiment and by using experimental data available from the literature. The present correlation shows better agreement with the experimental data than existing correlations.

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Xu, Liu Jie, Song Min Zhang, and Shi Zhong Wei. "Modeling Corrosion Property of High Vanadium High Speed Steel (HVHSS) under H₃PO₄ Medium Condition Using Artificial Neural Network." Applied Mechanics and Materials 52-54 (March 2011): 1243–46. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1243.

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The components in slurry pump suffer serious corrosion abrasion under H3PO4 medium. Presently, High chromium cast irons are often used to produce the components in slurry pump. New high vanadium high speed steel(HVHSS) has been proved to be a more excellent wear resistance material than high chromium cast irons under abrasive wear and rolling wear. In order to apply HVHSS in slurry pump to replace high chromium cast irons, the corrosion properties of HVHSS were tested under different H3PO4 medium concentration conditions. Using back-propagation (BP) neural network, the non-linear relationship between the corrosion weight losses (W) and H3PO4 concentration, corrosion time (C, t) is established on the base of the dealing with experimental data. The results show that the well-trained BP neural network can predict the wear weight loss precisely according to H3PO4 concentration and corrosion time. The prediction results reveal that the corrosion time and H3PO4 concentration have obvious effect on corrosion weight loss of HVHSS. And corrosion weight loss takes on linear relationship with corrosion time and H3PO4 concentration, respectively.

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Ovchinnikov, N., V. Portnyagina, and B. Dambuev. "Specifying the technical state limit value of the pump pulp without disassembling." Journal of Mining Institute 241 (February 25, 2020): 53. http://dx.doi.org/10.31897/pmi.2020.1.53.

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The northern part of the territory of the Republic of Sakha (Yakutia) is rich in vast deposits of diamonds. These deposits are developed by the mining company “Almazy Anabara”, which is engaged in the extraction of diamonds at seasonal processing plants using various technological equipment. One of the key types of equipment is the pulp pump of a foreign company “KETO”. The work of pulp pumps of this company in the enrichment of diamond-containing raw materials is accompanied by intensive hydroabrasive wear of their impellers, the service life of which usually does not exceed three months.In practice, untimely replacement of a worn impeller can lead to emergency breakdowns of sealing elements and bearings, which is explained by super-permissible deflections of the shaft of pumping equipment arising from a significant unbalance of the rotor.The main cause of breakdown of slurry pumps at “Almazy Anabara” seasonal processing plants is the inability to quickly identify their ultimate technical condition, the key sign of which is the maximum wear of the impeller.The seasonal beneficiation plants of “Almazy Anabara” currently need a simple and at the same time reliable diagnostic sign of pulp pumps reaching their ultimate technical state, the identification of which can be quickly performed without disassembling and using complex equipment, which is very important when operating pumping equipment in short wash season on the Far North.

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Tan, Jun Qing. "Construction of Ore Slurry Pipeline of Bayan Obo." Advanced Materials Research 339 (September 2011): 234–42. http://dx.doi.org/10.4028/www.scientific.net/amr.339.234.

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As the largest ore slurry pipeline system,and the third iron concentrate slurry pipeline interiorly, include the longest water pipeline with only one pump station in China, Bayan Obo slurry pipeline engineering of Baotou has been operated. It can transports 5.5 million tonnes of iron ore concentrate and 2000 million m3/h of water per year. In order to overcome freezing temperature and rugged terrain,many technical problems has been resolved in the period of construction.

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46

Ahmad, K., R. C. Baker, and A. Goulas. "Computation and Experimental Results of Wear in a Slurry Pump Impeller." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 200, no. 6 (November 1986): 439–45. http://dx.doi.org/10.1243/pime_proc_1986_200_153_02.

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Using a computer program to obtain the internal flow in a pump impeller, the trajectories of solid particles were found and used to predict the regions of wear within the pump. In order to assess the validity of this prediction method tests were undertaken to obtain the erosion-prone areas of the pump by observing the erosion of layers of paint on the pump impeller. There was good agreement but the level of erosion was underestimated by the predictions. The calculation method and the use of paint to obtain wear patterns were both promising methods. Maximum wear in this case was near the leading edge on the pressure side and on the back shroud in the eye of the impeller.

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47

Wang, Runkun, Yingjie Guan, Xing Jin, Zhenji Tang, Zuchao Zhu, and Xianghui Su. "Impact of Particle Sizes on Flow Characteristics of Slurry Pump for Deep-Sea Mining." Shock and Vibration 2021 (March 4, 2021): 1–13. http://dx.doi.org/10.1155/2021/6684944.

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As the core device of the deep-sea mining transport system, the slurry pump and its internal solid-liquid two-phase flow are extremely complicated; especially, the migration characteristics of particles have a great influence on the flow and wear of the pump. In order to grasp the particle motion law inside the slurry pump, this paper took into consideration the collision effects of the particles with particles and particles with walls and calculated the unsteady flow of the solid-liquid two-phase by CFD-DEM coupling algorithm. Then, the focus was put on the spatial distribution and movement characteristics of different particle diameters (namely, 5 mm, 10 mm, and 15 mm, while volume concentration Cv is constant 5%). The results show that the stratification phenomenon gradually disappears with the increase of particle diameter, and the intensity and scale of the vortex in the guide vane also increase obviously. Besides, as the particle diameter increases, the velocity changes more drastically, and the intensity and scale of the vortex increase significantly. Under low concentration conditions, the presence of particles has a limited influence on the hydraulic performance of the pump. By comparing with the experimental results, the simulation results are in good agreement with it, which proves that the CFD-DEM simulation in this paper is effective, and the conclusions can provide theoretical support for the design and analysis of the slurry pump in engineering application.

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Yang, Xue Cun, Yuan Bin Hou, and Ling Hong Kong. "The Coal Slurry Pipeline Pressure Prediction Research Based on Quantum Genetic BP Neural Network." Applied Mechanics and Materials 336-338 (July 2013): 722–27. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.722.

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According to the coal slime pipeline blockage problem of coal gangue thermal power plant, after the analysis of the actual scene, it is sure that thick slurry pump master cylinder pressure prediction is the necessary premise of blockage prediction. The thick slurry pump master cylinder pressure prediction model is proposed, which is based on QGA-BP (Quantum genetic Algorithm BP neural network). The simulation results show that the prediction model based on QGA-BP can be used to predict the paste pump outlet pressure, and the relative error is less than 8%, which can satisfy the engineering requirement .And compared with prediction model based on GA-BP(the genetic Algorithm BP neural network), The QGA-BP prediction model is better than GA-BP model in prediction accuracy and optimization time.

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49

Jiang, C., B. A. Fleck, and M. G. Lipsett. "Rapid Wear Modelling in a Slurry Pump Using Soft 3D Impeller Material." Energies 13, no. 12 (June 24, 2020): 3264. http://dx.doi.org/10.3390/en13123264.

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Slurry transport systems are often limited in run length by the life of the pump internals, especially the impeller. The present work investigated abrasive wear of the impeller of a Hayward Gordon XR2(7) Torus Recessed Impeller slurry pump in a flow loop. The stock stainless steel impeller was replaced by a set of plastic test impellers with the same nominal geometry, fabricated by additive manufacturing (3D printing). A parametric set of abrasive wear experiments was conducted at five pump rotational speeds and three solid concentrations of garnet slurry in a pipe flow loop. Pump performance tests were conducted using impellers with progressive wear conditions, to investigate how a worn impeller affects hydraulic power delivery. A parabolic fit was imposed to describe the relationship between head and flow rate, and an empirical model was proposed to predict the pump head with damaged impellers. When the rotational speed is high, the damaged impeller has a larger effect on the pump’s performance than when the rotational speed is low. The head difference between the undamaged impeller and a 7.62%-mass-loss damaged impeller was 1.5 m at 1750 rpm rotational speed, however, for 850 rpm, the head difference was 1 m. Implications for pump diagnostics in other types of systems are discussed. This experiment gives a method for rapidly assessing wear locations, and provides a tool to predict wear rates on harder materials if scaling parameters are available. This first attempt at a scaling law is not reliable enough to accurately predict the wear rate for specific conditions, but shows the relative wear as a function of pertinent parameters.

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Xiao, Yexiang, Bao Guo, Soo-Hwang Ahn, Yongyao Luo, Zhengwei Wang, Guangtai Shi, and Yanhao Li. "Slurry Flow and Erosion Prediction in a Centrifugal Pump after Long-Term Operation." Energies 12, no. 8 (April 23, 2019): 1523. http://dx.doi.org/10.3390/en12081523.

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After long-term operation, the material loss due to slurry erosion often leads to significant changes in the impeller geometry. This change can, in turn, affect the flow characteristics and the erosion mechanism in a centrifugal pump. To investigate this matter, we consider two geometric models based on a prototype stainless steel impeller, which failed due to huge erosion problems from the pulp slurry. These two models are different in the degree of wear, with one model at the pre-erosion stage and the other with worn blades. For both models, the flow characteristics have been obtained in the Eulerian reference frame by means of the SST k-ω model. Then, in order to determine the erosion patterns, the particles have been tracked in the Lagrangian reference frame. In this way, the influence of the flow characteristics on the erosion patterns has been analyzed. Results show that the geometric variations greatly affect the flow characteristics, and consequently the erosion patterns. Particularly, it has been found that the clearance flow plays a significant role in defining erosion characteristics, such as erosion distribution, areas, and rates. Interestingly, the simulation results for current study show that the erosion rates after long-term operation greatly decrease near both the outlet edge and the blade bottom. It follows also that for accurate erosion predictions, these geometric variations have to be considered in the numerical model. This paper provides a better understanding of the complex erosion mechanism in centrifugal pumps, which can help to reduce the wear in future designs.

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Journal articles on the topic 'Slurry pump'

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