松木颗粒流态化两段气化制备清洁燃气的工艺稳定性验证  

Process stability verification of the two-stage fluidized bed gasification for pine particles to produce clean gas

作　　者：王欣宇 王超[1,2] 张梦娟 刘方正 李晗旸 王正林 贾鑫 宋兴飞 许光文 韩振南 WANG Xinyu;WANG Chao;ZHANG Mengjuan;LIU Fangzheng;LI Hanyang;WANG Zhenglin;JIA Xin;SONG Xingfei;XU Guangwen;HAN Zhennan(Key Laboratory of Resources Chemicals and Materials(Shenyang University of Chemical Technology),Ministry of Education,Shenyang 110142,Liaoning,China;Institute of Energy and Chemical Industry Technology,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning,China)

机构地区：[1]特色资源化工与材料教育部重点实验室,辽宁沈阳110142 [2]沈阳化工大学能源与化工产业技术研究院,辽宁沈阳110142

出　　处：《化工进展》2024年第5期2576-2586,共11页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金新疆联合基金(U190310);国家自然科学基金青年科学基金(22108175);辽宁省教育厅高校基本科研项目(LJKMZ20220798)。

摘　　要：为了验证流态化两段气化工艺的长时间运行稳定性,本实验采用商用果木炭半焦作为松木流态化两段气化制备清洁燃气的催化床料。实验前期通过形成稳定的有效催化半焦床层,减少半焦在系统内的积累周期,以实现系统快速达到高效脱除焦油的目的。实验中,保持过量空气系数(ER)为0.35,提升管气速为3m/s,并逐渐调整流化介质中的氧气浓度,逐步增大生物质处理量。结果显示,随着松木颗粒的进料量从1kg/h增大到3kg/h,产品气中CO和H2体积分数分别从7.71%和3.13%增长至16.15%和12.60%,CH4的体积分数略微下降。气体收率(标准)也从0.90m^(3)/kg增长至1.36m^(3)/kg,相应的产品气热值(标准)从3.26MJ/m^(3)增加至4.80MJ/m^(3)。通过多次人为启停和改变运行参数等操作,在整个12h运行周期内,流态化两段气化产生的半焦与消耗的半焦速度相匹配,温度和压力表现出良好的运行稳定性。这一结果证明了流态化两段气化工艺在生物质制气中具有技术先进性和长时间运行稳定性。In order to verify the long-term operation stability of the two-stage fluidized bed gasification process,commercial fruit charcoal semi-coke is used as the catalytic bed material for the preparation of clean gas by pine fluidized two-stage gasification in this experiment.In the early stage of the experiment,a stable and effective catalytic semi-coke bed layer is formed to reduce the accumulation period of semi-coke,so as to quickly reach high-efficiency tar removal in the system.The excess air coefficient(ER)is maintained at 0.35,the gas velocity in the riser is 3m/s,and the oxygen concentration in the fluidization medium is gradually adjusted to gradually increase the biomass processing capacity.The results show that as the feed rate of pine particles increases from 1kg/h to 3kg/h,the volume percentages of CO and H2 in the product gas increase from 7.71% and 3.13% to 16.15% and 12.60%,respectively,while the volume percentage of CH4 slightly decreases.The gas yield also increases from 0.90m^(3)/kg to 1.36m^(3)/kg,and the corresponding calorific value of the product gas increases from 3.26MJ/m^(3)to 4.80MJ/m^(3).Through multiple manual start-stop and change of operating parameters,during the entire 12h operating cycle,the semi coke produced by the fluidized two-stage gasification matches the speed of semi-coke consumption,and the temperature and pressure show good operating stability.This result proves that the two-stage fluidized bed gasification process has technological advancement and long-term operation stability in the production of gas from biomass.

关 键 词：流态化 两段气化 循环流化床 低焦油合成气 生物质 反应解耦 

分 类 号：TQ546.2[化学工程—煤化学工程] TQ546.5