二氧化碳参与的粉煤热解-气化工业试验研究
Industrial test study on pyrolysis-gasification of pulverized coal with carbon dioxide
黄勇 1靳皎 1刘丹 1张晓欠 1刘彪 1刘巧霞1
作者信息
- 1. 陕西延长石油(集团)有限责任公司 碳氢高效利用技术研究中心,石油和化工行业化石碳氢资源高效利用工程研究中心,陕西 西安 710065
- 折叠
摘要
为开展煤炭清洁高效转化过程中的CO2循环利用研究,在处理量为36 t/d的热解-气化工业试验装置(简称"工业试验装置")中对粒径为0～300 μm的西湾煤进行了连续运行试验,考察了CO2参与的工业试验装置的物料和热量平衡、运行情况及产物性质的变化规律.结果表明,在热解温度为600℃、气化温度为1000℃和反应压力为0.8～1.0 MPa的条件下,CO2参与热解-气化过程后,工业试验装置运行稳定,吨煤蒸汽消耗量减少了5.38%,合成气中有效气(CO+H2)含量(体积分数,下同)由74.74%升高至79.63%,CO含量升高了10.43%,H2含量降低了5.54%,合成气热值、碳转化率及能源转化效率均升高.焦油产率由15.91%升高至16.25%,密度由1.06 kg/m3降低至1.02 kg/m3,运动黏度由3.42 mm2/s降低至2.70 mm2/s,硫质量分数由0.20%降低至0.15%,同等质量焦油馏分对应的温度降低了10～30℃.焦油中脂肪烃质量分数提高了7.53%,芳香烃质量分数降低了5.47%,其他化合物质量分数提高了15.98%.
Abstract
In order to study the recycle of CO2 in the process of coal clean and efficient conversion,Xiwan coal with the particle size of 0 μ m to 300 μ m was continuously run in a pyrolysis-gasification industrial test device with a processing capacity of 36 t/d(referred to as"industrial test facility").The material and heat balance,operation and product properties of industrial test device with CO2 were investigated.The results show that under the conditions of pyrolysis temperature of 600℃,gasification temperature of 1000℃and reaction pressure of 0.8 MPa to 1.0 MPa,after CO2 participates in the pyrolysis-gasification process,the industrial test device runs stably,and the steam consumption per ton of coal decreases by 5.38%,and the content of effective gas(CO+H2)in syngas increases from 74.74%to 79.63%,and CO content increases by 10.43%,and H2 content decreases by 5.54%,and syngas calorific value,carbon conversion rate and energy conversion efficiency increase.The yield of tar increases from 15.91%to 16.25%,the density decreases from 1.06 kg/m3 to 1.02 kg/m3,the kinematic viscosity decreases from 3.42 mm2/s to 2.70 mm2/s,the mass fraction of sulfur decreases from 0.20%to 0.15%,and the corresponding temperature of the same quality of tar fraction decreases by 10℃to 30℃.The mass fraction of aliphatic hydrocarbon in tar increases by 7.53%,the mass fraction of aromatic hydrocarbon decreases by 5.47%,and the mass fraction of other compounds increases by 15.98%.
关键词
流化床/二氧化碳/热解-气化/工业试验Key words
fluidized bed/carbon dioxide/pyrolysis-gasification/industrial test引用本文复制引用
基金项目
陕西省创新能力支撑计划(2023-YBGY-081)
陕西延长石油(集团)有限责任公司科技项目(ycsy2023ky-B-80)
出版年
2024
国家科技期刊平台
NSTL
万方数据