Optimization analysis on biomass pyrolysis polygeneration scheme based on fractional condensation
CHEN Jing-jing1, LIU Jie1, LAN Xiao-bang2, TONG Bang-wei1, ZHANG Cong3
1. Qingdao University of Technology, Qingdao 266033, China; 2. Qingdao Agricultural Technology Popularization Center, Qingdao 266033, China; 3. Linyi Lanshan District Bureau of Administrative Examination and Approval Service, Linyi 276000, China
Abstract: Traditional internal heat kiln biomass pyrolysis-carbonization technology exhibits a stable yield and produces excellent quality of carbon,but the pyrolysis gas is usually condensed by a single equipment,with few by-products,poor quality,low overall energy utilization rate and economic benefit,and environmental problems.Therefore,an optimization scheme for the pyrolysis gas is proposed combined with the production-data of a carbon production plant.Through analysis on the composition of bio-oil and non-condensable gas products,the compound model for the pyrolysis gas produced by this process is established,and the biomass pyrolysis polygeneration system with three-stage condensation as the core is obtained through condensation calculation.By analyzing the thermodynamic performance and economy of the system,it is found that the energy utilization ratio of the optimized scheme increases to 71.07% from 50.56% by traditional process.The additional annual profit is 4.5 times the renovation investment,and the purpose of biomass energy comprehensive utilization and pollution reduction has been realized.
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