废食用菌棒循环流化床气化试验

doi:10.16085/j.issn.1000-6613.2019-1792

摘要/Abstract

摘要：

废菌棒是食用菌生产过程中产生的残余废弃物，其再利用对于资源节约与环境保护具有重要意义。本文采用循环流化床气化炉对废菌棒进行了气化试验，分别研究空气当量比、水蒸气配比对气化炉运行温度、气化燃气组分与热值、焦油含量、气化效率及碳转化率等气化特性的影响规律。结果表明：空气当量比由0.20增大至0.35时，循环流化床运行温度与碳转化率升高，气化燃气中的CO₂体积分数增大，CO与焦油含量及气化燃气热值下降，气化效率呈现先增大后减小的趋势；空气当量比为0.26时气化效率达到最大74.86%，此时燃气热值为5.59MJ/m³。以空气为主气化介质，采用水蒸气作为辅助气化剂，可以改善气化燃气品质，提升气化效率。当空气当量比为0.26、水蒸气配比为0.2时，废菌棒具有较好的空气-水蒸气气化特性，燃气热值与气化效率分别达到最大值6.14MJ/m³与83.73%。

关键词: 生物质, 气化, 循环流化床, 废菌棒, 合成气

Abstract:

There are many wasted fungus inoculation bag residues in the process of edible fungi production. The recycle of edible fungi residues is important for conserving resources and protecting the environment. A circulating fluidized bed gasification pilot plant was built to study the effect of air equivalence ratio and steam/biomass ratio of raw materials on gasification characteristics, including reaction temperature, gas composition, calorific value, tar content in produced gas, gasification efficiency, and carbon conversion rate. The results showed that the operating temperature of circulating fluidized bed gasifier, carbon conversion rate and the content of CO₂ increased with the increase of air equivalence ratio (from 0.20 to 0.35), while the content of CO, calorific value and tar content decreased. The gasification efficiency increased first and then decreased. When air equivalence ratio was 0.26, the gasification efficiency reached the maximum of 74.86% and calorific value reached 5.59MJ/m³. The results also showed that gas quality and gasification efficiency were improved with air as main gasifying agent and steam assisted. When the operation conditions were 0.26 of air equivalence ratio and 0.2 of steam/biomass ratio, gas calorific value and gasification efficiency reached to maximum value of 6.14MJ/m³and 83.73%, respectively.

Key words: biomass, gasification, circulating fluidized bed, wasted fungus inoculation bag, syngas

中图分类号:

董磊, 常加富, 杜巍涛, 刘全美, 董玉平, 徐鹏举. 废食用菌棒循环流化床气化试验[J]. 化工进展, 2020, 39(7): 2606-2611.

Lei DONG, Jiafu CHANG, Weitao DU, Quanmei LIU, Yuping DONG, Pengju XU. Experiment of gasification of edible fungi residues in circulating fluidized-bed[J]. Chemical Industry and Engineering Progress, 2020, 39(7): 2606-2611.

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