半干法双循环催化裂化烟气净化技术开发与应用  

Development and application of double loop circulating type of semi-dry flue gas treating technology for FCCU

作　　者：吴德飞 Wu Defei(SINOPEC Engineering Incorporation,Bejing 100101)

机构地区：[1]中国石化工程建设有限公司,北京市100101

出　　处：《炼油技术与工程》2022年第8期8-15,共8页Petroleum Refinery Engineering

基　　金：中国石油化工股份有限公司科技开发项目(CLY18041)。

摘　　要：为了提高常规半干法工艺的稳定性和可靠性,创新开发了半干法双循环催化裂化烟气净化技术。通过研究脱硫灰颗粒的流动特性,确定了半干法脱硫反应器的气速范围;创新开发的半干法双循环烟气净化工艺和反应系统技术,提高了脱硫剂的循环强度及利用率,外排脱硫灰颗粒中Ca(OH)_(2)质量分数由6.00%降低至2.74%,钙硫比降低了15%。经专业鉴定外排脱硫灰颗粒为一般固体废物,具有无害化利用价值。该技术已在清江石化成功应用,装置操作平稳、运行可靠、脱硫除尘效率高、无废水排放,满足GB31570—2015《石油炼制工业污染物排放标准》及超低排放指标对SO_(2)和颗粒物的要求,投资和操作费用低。Novel double loop circulating type of semi-dry flue gas treating technology for FCCU was developed in order to improve the stability and reliability of the conventional semi-dry process.Based on the fluidization research of desulfurization powder,an optimized gas velocity of desulfurization reactor was determined.The circulation intensity and utilization ratio of desulfurization agent was improved as a result of the double loop circulating method and reacting system,and thus the content of Ca(OH)_(2) in desulfurization powder was cut from 6.00%to 2.74%,while Ca/S consumption ratio was also reduced by 15%.According to qualified analysis identification,the desulfurization powder was confirmed as general solid waste with a harmless recycling value.The successful application of this novel technology in Qingjiang Company has proved its numerous advantages:smooth and steady operation,high removal efficiency of pollutant,zero emission of waste water as well as the low cost of investment and operation.

关 键 词：半干法 双循环 催化裂化 烟气净化 脱硫灰 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]