Pilot Development of Polygeneration Process of Circulating Fluidized Bed Combustion combined with Coal Pyrolysis |
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| Authors: | X Qu P Liang Z Wang R Zhang D Sun X Gong Z Gan J Bi |
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| Affiliation: | 1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, China;2. Graduate School, Chinese Academy of Sciences, Beijing, China;3. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, China;4. Ningbo Branch of Academy of Ordnace Science, Ningbo, China;5. Hengyuan Coal Electrochemical Co., Ltd, Fugu, China;6. State Key Laboratory of Low Carbon Energy, ENN Science & Technology Ltd, Langfang, China |
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| Abstract: | A pilot polygeneration process of a 75 t h–1 circulating fluidized bed (CFB) boiler combined with a moving bed coal pyrolyzer was developed based on laboratory‐scale experimental results. The process operation showed good consistency and integration between boiler and pyrolyzer. Some critical operating parameters such as hot ash split flow from the CFB boiler to the pyrolyzer, mixing of hot ash and coal particles, control of pyrolysis temperature and solid inventory in the pyrolyzer, and pyrolysis gas clean‐up were investigated. Yields of 6.0 wt‐% tar and 8.0 wt‐% gas with a heating value of about 26 MJ m–3 at 600 °C were obtained. Particulate content in tar was restrained less than 4.0 wt‐% by using a granular filter of the moving bed. Operation results showed that this pilot polygeneration process was successfully scaled up. |
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| Keywords: | Circulating fluidized bed boiler Coal pyrolysis Polygeneration Scale‐up |
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