Test rig design to simulate ashlock valve erosion in coal gasification systems

 

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dc.contributor.advisor Ball, Anthony en_ZA
dc.contributor.author Willmott, Simon Spencer en_ZA
dc.date.accessioned 2016-09-25T16:11:04Z
dc.date.available 2016-09-25T16:11:04Z
dc.date.issued 1984 en_ZA
dc.identifier.citation Willmott, S. 1984. Test rig design to simulate ashlock valve erosion in coal gasification systems. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/21861
dc.description.abstract The erosion of ashlock hopper valves in coal gasification systems, and the maintainance downtime resulting from this erosion, is a cause of considerable concern to the coal conversion industry. After an assessment of the factors considered relevant to solid particle erosion as presented in literature, a design for a laboratory test apparatus to closely simulate the in-service problem was proposed. A test rig prototype, reproducing service conditions of temperature, pressure and geometry, was constructed and preliminary testing conducted. Various problems impairing the efficient operation of the test facility became apparent and these, together with the proposed solutions and modifications to the prototype rig, are discussed. Both room temperature and elevated temperature (400°C) erosion tests were conducted on the hardfacing seat material presently used on site as well as a on selection of common engineering materials. Optical and scanning electron microscopy (SEM) studies revealed a close correlation between in-situ and laboratory erosion damage, suggesting that the test apparatus is a valid simulation of the service problem. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Materials Engineering en_ZA
dc.title Test rig design to simulate ashlock valve erosion in coal gasification systems en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering and the Built Environment
dc.publisher.department Centre for Materials Engineering en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Willmott, S. S. (1984). <i>Test rig design to simulate ashlock valve erosion in coal gasification systems</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/21861 en_ZA
dc.identifier.chicagocitation Willmott, Simon Spencer. <i>"Test rig design to simulate ashlock valve erosion in coal gasification systems."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1984. http://hdl.handle.net/11427/21861 en_ZA
dc.identifier.vancouvercitation Willmott SS. Test rig design to simulate ashlock valve erosion in coal gasification systems. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1984 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21861 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Willmott, Simon Spencer AB - The erosion of ashlock hopper valves in coal gasification systems, and the maintainance downtime resulting from this erosion, is a cause of considerable concern to the coal conversion industry. After an assessment of the factors considered relevant to solid particle erosion as presented in literature, a design for a laboratory test apparatus to closely simulate the in-service problem was proposed. A test rig prototype, reproducing service conditions of temperature, pressure and geometry, was constructed and preliminary testing conducted. Various problems impairing the efficient operation of the test facility became apparent and these, together with the proposed solutions and modifications to the prototype rig, are discussed. Both room temperature and elevated temperature (400°C) erosion tests were conducted on the hardfacing seat material presently used on site as well as a on selection of common engineering materials. Optical and scanning electron microscopy (SEM) studies revealed a close correlation between in-situ and laboratory erosion damage, suggesting that the test apparatus is a valid simulation of the service problem. DA - 1984 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1984 T1 - Test rig design to simulate ashlock valve erosion in coal gasification systems TI - Test rig design to simulate ashlock valve erosion in coal gasification systems UR - http://hdl.handle.net/11427/21861 ER - en_ZA


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