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Separation of woodpowder in a cyclone gasifier
1999 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A project concerning gasified biomass in a gas turbine is currently running at ETC, Piteå. Areas of concern for a project of this kind include the gas contamination by alkali metals, tars, sulphur, chlorine and particulates. Earlier experiments indicate that the performance of the cyclone gasifier with respect to particle separation, needs to be improved. As a result of this, a systematic study of the cyclone performance needs to be carried out to obtain a way to increase the cyclone performance. The aim of this paper has been to examine the separation of wood particles in a cyclone gasifier, which is used to generate gas to a gas turbine. The project work has been carried out in three stages. First a survey of literature was accomplished to determine the recommended alkali restrictions for gas turbine manufacturers. For practical purpose, alkali levels are restricted to 20 ppbw at the turbine inlet. A parameter study was completed to determine which of the existing outlet exit tubes gives the highest separation efficiency. Finally, the results obtained from the parameter study were compared to the predictions from a semi-empirical model. Hence a comparison would establish how well the predictions describe the existing cyclone design with respect to particle separation.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Alkali, Biomass, Cyclone, Gasification, Particle separation
Keyword [sv]
URN: urn:nbn:se:ltu:diva-58493ISRN: LTU-EX--99/013--SELocal ID: f13dbf04-91f1-467b-a7e2-4cf2640f5fc9OAI: diva2:1031881
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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