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Dissertations / Theses on the topic 'Pneumatic conveying'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Yi, Jianglin. "Transport boundaries for pneumatic conveying." Faculty of Engineering, 2001. http://ro.uow.edu.au/theses/1840.

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Pneumatic conveying is being selected for an increasing number of industrial applications and products and is playing a more vital and integral role in the transportation of solid materials such as plastic pellets, grain and chemicals. However, despite all the minimum conveying velocity research (one of the operating boundaries for pneumatic conveying) that has been undertaken for several decades, the wide scatter and contradictions in the predictions of the minimum conveying velocity for dilute phase pneumatic conveying exist yet, determination of the operating boundaries for pneumatic convey

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2

Roberts, Jacob Thomas. "Splitting techniques in vertical pneumatic conveying." Thesis, University of Nottingham, 2007. http://eprints.nottingham.ac.uk/13593/.

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The following work details an investigation into improving efficiency in pulverised-fuel- fired power stations. The particular area of focus is the splitter box; this is located in the pneumatic conveying pipeline within the power station. The conveying pipelines take the pulverised fuel from the mill to the burner face, at some point the air/fuel mixture has to be split to feed the individual burners. It is at these points that the splitter boxes occur, dividing the pipe into multiple legs. It is common for some of these splits to produce poor fuel balance between legs, leading to excess air

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3

Ling, S. J. "Dense phase pneumatic conveying of fine coal." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381038.

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4

Birk, Wolfgang. "Multivariable control of a pneumatic conveying system." Licentiate thesis, Luleå tekniska universitet, Signaler och system, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17648.

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This licentiate thesis deals with a multivariable controller of a pneumatic conveying system. The industrial process used to illustrate design, analysis and implementation of a multivariable controller is the injection of fine coal into a blast furnace. In the blast furnace process, coke is replaced by fine coal because of economical and environmental reasons. The coal mass flow to the blast furnace becomes a crucial parameter for its operation and hence a control system should be in place to maintain a constant flow. An optimal multivariable linear-quadratic controller has been designed i

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5

Bradley, Michael S. A. "Prediction of pressure losses in pneumatic conveying pipelines." Thesis, University of Greenwich, 1990. http://gala.gre.ac.uk/14606/.

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This project arose out of a need to improve the accuracy with which the pressure drop along pneumatic conveying pipelines in process plant could be predicted. The methods previously available for making this prediction are examined and critically assessed. The need for a different method is shown, and a new approach is developed and tested. The new approach involves testing of the product to be conveyed, in a test pipeline at the smaller end of the industrial scale, with measurements being made of the pressure drop caused by bends and of the pressure gradients in straight lengths; the data is

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6

Li, Jintang. "Heat transfer in gas-solids flows through pipes." Thesis, Glasgow Caledonian University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313180.

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7

Mallick, Soumya Suddha. "Modelling of fluidised dense-phase pneumatic conveying of powders." Centre for bulk solids and particulate technologies - Faculty of Engineering, 2009. http://ro.uow.edu.au/theses/3077.

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Dense-phase pneumatic conveying of powders is becoming increasingly popular in various industries such as power, pharmaceutical, cement, alumina, chemical, limestone, refinery, and so on. Some of the reasons include: minimum gas flows and power consumption; improved product quality; increased workplace safety. However, due to the highly concentrated and turbulent mode of the solids-gas flow, only limited progress has been be achieved so far in understanding the fundamental transport mechanisms and accurately predicting pipeline pressure drop, which is a key system design parameter. This thesis

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8

Watson, Roger James. "Vertical dense-phase pneumatic conveying from a fluidized bed." Thesis, University of Surrey, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502635.

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9

Kessel, Stephen Ronald. "The interaction between rotary valves and pneumatic conveying pipelines." Thesis, University of Greenwich, 1985. http://gala.gre.ac.uk/9292/.

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The object of this work was to investigate the interaction between rotary valves and pneumatic conveying pipelines and the effect which this can have on overall system performance. A review of previous work and current industrial practice revealed that very little work has been published on this subject, although it was evident that some manufacturers of pneumatic conveying systems do have preferred entrainment configurations. Consequently, a preliminary experimental investigation was undertaken with a transparent model of a rotary valve and drop-out box in order to observe the air and solid f

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10

Cowell, Andrew. "Investigation of particle-surface impacts in pneumatic conveying systems." Thesis, Glasgow Caledonian University, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.688312.

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11

Xiang, Jiansheng. "Investigation of particle motion in dense phase pneumatic conveying." Thesis, Glasgow Caledonian University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413654.

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12

Beck, C. M. "Instrumentation and control for minimum energy consumption in pneumatic conveying." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379820.

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Pneumatic conveyors have been used for the transportation of solids for many decades. Their design is substantially empirical, and because they run with almost no instrumentation or control, large safety factors are employed to ensure long-term safe and reliable conveying under all envisaged conveying conditions. The resulting excessive conveying velocity leads to increased energy consumption, pipeline wear and solids breakdown. The aim of the work reported in this thesis was to develop an instrumentation and control system which provides minimum cost conveying for a variable solids feedrate a

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13

Mainwaring, N. J. "The effect of physical properties of bulk solid materialsT on modes of dense phase pneumatic conveying." Thesis, University of Greenwich, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382932.

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14

Jones, Mark G. "The influence of bulk particulate properties on pneumatic conveying performance." Thesis, University of Greenwich, 1988. http://gala.gre.ac.uk/7146/.

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Interest in the use of dense phase conveying has grown considerably in recent years. However, not all products are capable of being conveyed in dense phase and it is often difficult to predict which products have dense phase capability without carrying out pilot conveying trials. The main objective of this work was to investigate the effect of bulk particular properties on pneumatic conveying performance. To achieve this, an extensive programme of conveying trials was carried out and each product tested was subjected to a series of bench scale tests to evaluate the bulk properties of the mater

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15

Rogers, D. A. Philip. "Flow phenomena and splitting techniques in horizontal pneumatic conveying pipe-lines." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490827.

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This work documents the research, design and implementation of devices to improve the balance of junction splits in the pneumatic conveying systems of conventional coal fired power stations. The organisation of the thesis follows the design process chronologically, culminating in the installation of the prototype designs in operational pneumatic conveying systems.

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16

Hitt, R. J. "An investigation into the low velocity pneumatic conveying of bulk solids." Thesis, University of Greenwich, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354924.

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17

Chaudhry, Ahmed Rizwan. "Prediction of bend pressure losses in horizontal lean phase pneumatic conveying." Thesis, University of Greenwich, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405306.

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18

Ebrahimi, Mohammadreza. "CFD-DEM modelling of two-phase pneumatic conveying with experimental validation." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9693.

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A wide range of industrial processes involve multiphase granular flows. These include catalytic reactions in fluidized beds, the pneumatic conveying of raw materials and gas-particle separators. Due to the complex nature of multiphase flows and the lack of fundamental understanding of the phenomena in a multiphase system, appropriate design and optimized operation of such systems has remained a challenging field of research. Design of these processes is hampered by difficulties in upscaling pilot scale results, the difficulties involved in experimental measurements and in finding reliable nume

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19

Berg, Rolf Rainer. "Hydro-pneumatic conveying of liquid by means of an airlift pump." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/8316.

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Includes bibliography.<br>Airlift pumps operating in two-phase gas-liquid flow are investigated with a view to establishing an analytical technique to aid in theoretically modelling air-lift pump behaviour. Extensive work on two test facilities constructed at the University of Cape Town's Hydrotransport Research facility has been done. Various components needed for the analysis are investigated. These include: (i) static dilation; (ii) dynamic void ratios; (iii) two phase weight component; (iv) two phase friction component; (v) two phase acceleration component. Using theoretical models for eac

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20

Totah, Thomas S. "Dense-phase pneumatic transport of cohesionless solids." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80160.

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An experimental program has been undertaken to gain a more fundamental understanding of dense-phase pneumatic transport of cohesionless solids. A 50.8 mm internal diameter circulating unit with both horizontal and vertical sections has been constructed . The pipe material is transparent lexan which allows for visual observation of the flow pattern. The particles used were a mixture of 95% white and 5% black polyethylene granules (particle diameter approximately 3 mm). The black particles were used to aid the visual observation of the flow pattern. The flow patterns ranged from dilute-phase flo

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21

Barton, Stephen. "The effect of pipeline flow conditioning on dense phase pneumatic conveying performance." Thesis, Glasgow Caledonian University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267080.

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22

Al-Faysale, Muaiad Shawqi Murad. "Measurement, condition monitoring and flow modification in light-phase pneumatic conveying systems." Thesis, University of Bradford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253472.

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23

Bennett, Mark Andrew. "On-line measurement of multiphase processes using electrical capacitance tomography." Thesis, University of Exeter, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302541.

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24

Folarin, Olalekan A. "Investigation into the performance and optimisation of pneumatic conveying systems with stepped pipelines." Thesis, Glasgow Caledonian University, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.726760.

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25

Kus, Francis. "Solid Fuel Pneumatic Conveying and its Injection Geometry in a Pressurized Entrained Flow Gasifier." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34419.

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Rising global energy demands have led to an increase in demand for clean, sustainable energy. A leading technology for reducing greenhouse gas (GHG) emission for existing coal-power infrastructure is gasification, which has sparked an interest in reactor modelling for design and performance analysis. Reduced order models (ROMs) have seen an increase in popularity for entrained flow gasifiers, as they offer a low-computational alternative to conventional computational fluid dynamic (CFD) modelling while maintaining the integrity of important operational parameters, such as carbon conversion and

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26

Ashenden, Stuart John. "An examination of the discharge capabilities of blow tanks as feeders for pneumatic conveying systems." Thesis, University of Greenwich, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276154.

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27

Selves, Timothy Patrick. "Analysis and control of splitting ratios of particulate materials at bifurcations in pneumatic conveying pipelines." Thesis, University of Greenwich, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318940.

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28

Smit, Jacobus Christiaan. "Development of a compensated capacitance sensor for solid mass flow measurement in pneumatic conveying systems." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/61337.

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This dissertation describes research and experimental work done to improve the accuracy and applicability of capacitive sensors which are used to evaluate the mass flow rate of solid material within pneumatic conveying environments in power plant engineering applications. The research is focused on creating a measurement methodology on which solid mass flow rate can be evaluated without being dependent on variable flow regimes. The proposed research investigates the process of identifying four different types of flow regimes using a decision tree that utilises support vector machines and cut o

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29

Fitzgerald, Shawn. "A pneumatic conveying powder delivery system for continuously heterogeneous material deposition in solid freeform fabrication." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/46072.

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<p>Great improvements are continuously being made in the solid free form fabrication (SFF) industry in terms of processes and materials. Fully functional parts are being created directly with little, if any, finishing. Parts are being directly fabricated with engineering materials such as ceramics and metals. This thesis aims to facilitate a substantial advance in rapid prototyping capabilities, namely that of fabricating parts with continuously heterogeneous material compositions. Because SFF is an additive building process, building parts layer-by-layer or even point-by-point, adjusting mate

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30

Hettiaratchi, Kaushika. "A comparison between the pressure gradients in vertical and horizontal pneumatic conveying, with an investigation into the effect of pipeline bore in vertical conveying." Thesis, University of Greenwich, 2006. http://gala.gre.ac.uk/6190/.

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This study was initiated by the need to improve current techniques used in the design of pneumatic conveying systems. At present, the commonly used method to predict the pressure drop in a vertical pipeline in a pneumatic conveying system is to obtain the pressure gradient in a horizontal for the identical conveying conditions and double the pressure gradient in the horizontal pipeline to give the pressure gradient in the vertical pipeline. In addition, scaling for pipeline bore in vertical pipelines is simply undertaken by considering the change in cross-sectional area. This is another area w

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31

Lu, Yong. "Investigation of the particle dynamics of a multi-component solid phase in a dilute phase pneumatic conveying system." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3894.

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In order to mitigate the risk of global warming by reducing CO2 emissions, the co-firing technique, burning pulverized coal and granular biomass together in conventional pulverised fuel power station boilers, has been advocated to generate “greener” electricity to satisfy energy demand while continuing to utilize existing rich coal resources. A major problem is controllably distributing fuel mixtures of pulverized coal and granular biomass in a common pipeline, thus saving much investment. This is still under development in many co-firing studies. This research into particle dynamics in pipe f

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32

Plodpradista, Wisuwat. "Study of tubular linear induction motor for pneumatic capsule pipeline system /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3052209.

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33

Besa, Bunda. "Evaluation of monorail haulage systems in metalliferous underground mining." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/1196.

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The decline is a major excavation in metalliferous mining since it provides the main means of access to the underground and serves as a haulage route for underground trucks. However, conventional mining of the decline to access the ore body poses economic and technical challenges that require innovative responses. The average cross-sectional area of mine declines in Australia is 5m wide x 5m high. The large excavations associated with current underground mining practices are economically and geotechnically inappropriate, especially for narrow vein mining conditions. The decline gradient of 1 i

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34

Lecreps, Isabelle J. M. [Verfasser], Karl-Ernst [Akademischer Betreuer] Wirth, Karl [Akademischer Betreuer] Sommer, and Horst-Christian [Akademischer Betreuer] Langowski. "Physical mechanisms involved in the transport of slugs during horizontal pneumatic conveying / Isabelle J. M. Lecreps. Gutachter: Karl-Ernst Wirth ; Karl Sommer ; Horst-Christian Langowski. Betreuer: Karl Sommer." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1013435567/34.

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35

Barbosa, Paulo Roberto. "Controle difuso em transportadores pneumáticos de sólidos: redução do consumo de potência." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-06102015-110253/.

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O transporte pneumático de sólidos constitui uma aplicação comum em processos industriais petroquímicos, de mineração, de alimentos e agrícola. Entretanto, devido a limitações de ordem prática, a maioria das aplicações existente envolve o transporte de 1 a 400 toneladas por hora, através de distâncias de até 1000 m. Entre estas limitações, o consumo de potência provavelmente é a mais severa. Um sistema de transporte seguro e que apresente uma redução no consumo de potência pode ser implementado com técnicas não convencionais de controle. Este trabalho descreve a implementação de um controlador

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36

Yatskul, Andrii. "Modélisation et optimisation énergétique des organes d'un semoir pneumatique." Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOS023/document.

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Dans le contexte du développement d’une agriculture durable, il est nécessaire d’optimiser le coût énergétique des opérations agricoles tout en garantissant des temps de travaux courts ainsi que la qualité des opérations réalisées. Cette question concerne en particulier l’opération du semis qui est déterminante pour la qualité de la future récolte. Les semoirs de grande capacité et à haute productivité conçus aujourd’hui se doivent d’être compatibles avec cet ensemble de contraintes. L’enjeu essentiel de cette thèse est donc d’élaborer une méthodologie innovante et utilisant des outils de modé

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37

Schneider, Helfried, Thomas Frank, Klaus Pachler, and Klaus Bernert. "A Numerical Study of the Gas-Particle Flow in Pipework and Flow Splitting Devices of Coal-Fired Power Plant." Universitätsbibliothek Chemnitz, 2002. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200200348.

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In power plants using large utility coal-fired boilers for generation of electricity the coal is pulverised in coal mills and then it has to be pneumatically transported and distributed to a larger number of burners (e.g. 30-40) circumferentially arranged in several rows around the burning chamber of the boiler. Besides the large pipework flow splitting devices are necessary for distribution of an equal amount of pulverised fuel (PF) to each of the burners. So called trifurcators (without inner fittings or guiding vanes) and ''riffle'' type bifurcators are commonly used to split the gas-coal p

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38

Müller, Jan. "Kondenzační technika a odvody spalin." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226844.

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This thesis is developed as a proposal for heating for a primary school and kindergarten in the region of Brno-countryside. For the insulated building, a combination of heating and air-conditioning is proposed. The concept is designed so that the air-conditioning preheats the exterior air and the heating system warms the incoming air to a comfortable temperature. For the required thermal performance, sources of heat (for gas and pellets) and a layout solution for the boiler room is designed. Drainage of combustion products is proposed for both solutions. The project solution is per the extent

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39

Bettman, Richard. "Long distance pneumatic conveying." Thesis, 2015. http://hdl.handle.net/10539/16268.

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40

Nemutandani, Rofhiwa. "Conveying air requirements for a dense phase fly ash pneumatic conveying system." Thesis, 2020. https://hdl.handle.net/10539/31274.

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A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Science in Engineering, 2020<br>An investigation was undertaken into the air usage for a dense-phase pneumatic conveying system that removes fly ash from coal-fired power station generating 800 MW each per each Unit. The objective of the research was to establish the air flowrate required to convey fly ash in dense phase and also determine if the installed compressors will be sufficient to supply the required

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41

Rafique, Quereshi Muhammad Mushahid. "Numerical study of pneumatic conveying of powders." Thesis, 2003. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2003-013.

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42

Yilmaz, Ali. "Roping phenomena in lean phase pneumatic conveying /." Diss., 1997. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9814993.

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43

Behera, Niranjana. "Fluidized dense phase pneumatic conveying of fine particles." Thesis, 2013. http://localhost:8080/xmlui/handle/12345678/4517.

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44

Zhu, Kewu, Jun Yao, and Chi-Hwa Wang. "On the Electrostatics of Pneumatic Conveying of Granular Materials." 2003. http://hdl.handle.net/1721.1/3939.

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In this work the electrostatics of the pneumatic conveying of granular materials in a non-conducting (PVC) vertical pipe is studied using Electrical Capacitance Tomography (ECT) system. The non-conducting wall in general attains static charges arising from particle-wall collisions in the initial periods of conveying process and then reaches equilibrium with the surroundings. The polarity of particles and conveying pipe inner wall agrees reasonably well with the contact potential difference measurements. The perturbations in the capacitance signal due to charge accumulation are larger with smal

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45

Williams, Kenneth. "Dense Phase Pneumatic Conveying of Powders: Design Aspects and Phenomena." Thesis, 2008. http://hdl.handle.net/1959.13/31841.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Determining the operating parameters and design considerations for dense phase (non-suspension) conveying of fine powders in pneumatic systems typically use empirical, steady-state modelling techniques, as the mechanisms of the flow behaviour are still not fully understood. However, this necessary simplification in the modelling of the dense phase flow still presents significant challenges in ensuring that the predicted outcomes adequately reflect the physical nature of the flow, and therefore provide good design guidance. This thesis represen

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46

Williams, Kenneth. "Dense Phase Conveying of Powders: Design Aspects and Phenomena." 2008. http://hdl.handle.net/1959.13/31841.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Determining the operating parameters and design considerations for dense phase (non-suspension) conveying of fine powders in pneumatic systems typically use empirical, steady-state modelling techniques, as the mechanisms of the flow behaviour are still not fully understood. However, this necessary simplification in the modelling of the dense phase flow still presents significant challenges in ensuring that the predicted outcomes adequately reflect the physical nature of the flow, and therefore provide good design guidance. This thesis represen

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47

Yao, Jun, Chi-Hwa Wang, and Wee Chuan Lim. "Granular Attrition due to Rotary Valve in a Pneumatic Conveying System." 2004. http://hdl.handle.net/1721.1/7481.

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The rotary valve is a widely used mechanical device in many solids-handling industrial processes. However, it may also be responsible for most of the attrition effects occurring in a typical process. In this study, the attrition effects occurring in a rotary valve operating as a stand-alone device and as part of a pneumatic conveying system were investigated. In the former case granular attrition was carried out at three different rotary valve speeds and the experimental results obtained were found to be in good agreement with the Gwyn correlation. In the latter case three typical air flow rat

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48

Bilirgen, Harun. "Mixing and dispersion of particle ropes in lean phase pneumatic conveying /." Diss., 2000. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9982860.

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49

Chen, Bin. "Experimental and theoretical advances for innovative bypass pneumatic conveying system design." Thesis, 2014. http://hdl.handle.net/1959.13/1047942.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Pneumatic conveying is a popular method of transporting materials in the resource and process industries because of its advantages of no dust emission, flexible conveying pipe routes and capability to convey poisonous and hazardous material. There are two primary modes of pneumatic conveying: dilute phase and dense phase. One of the significant advantages of dense-phase conveying over dilute phase is the ability to convey materials at relatively low conveying velocities, resulting in significantly reduced particle attrition and erosive wear of

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50

Tan, Shengming. "Dynamic analysis of non-steady flow in granular dense phase pneumatic conveying." Thesis, 2009. http://hdl.handle.net/1959.13/41765.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Slug flow dense phase pneumatic conveying can be a most reliable, efficient method for handling a remarkably wide range of dry bulk solids. Models for pressure drop over slugs in the low-velocity slug-flow pneumatic conveying by many researchers only took the force balance into account with the pressure drop. However, the nature of the slug flow pneumatic conveying is discontinuous and seldom becomes steady during the conveying period which requires further investigation. The fundamental understanding to gas/slug interaction in this thesis is

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