气流床煤气化的部分水激冷流程研究  

Water partially quenching process of entrained-flow gasification

作　　者：彭宇慧[1] 代正华[1] 龚欣[1] 郭晓镭[1] 王辅臣[1] 刘海峰 

机构地区：[1]华东理工大学洁净煤技术研究所,上海200237

出　　处：《化学工程》2010年第2期83-86,共4页Chemical Engineering(China)

基　　金：国家重点基础研究发展计划项目(2004CB217700);教育部新世纪人才支持计划(NCET-05-0413)

摘　　要：提出了采用部分水激冷的方式冷却气流床气化炉气化室出口的高温合成气和融渣,模拟计算了(1)水煤浆气化+耐火砖衬里、(2)粉煤气化+耐火砖衬里、(3)粉煤气化+水冷壁衬里3个气化工艺的性能指标。结果表明:采用部分水激冷方式的出废热锅炉的气体流量远小于用合成气激冷方案的Shell和Prenflo流程,这将有助于减少后续的设备尺寸;激冷水温度对合成气和废热锅炉蒸汽的总热效率无明显影响,可以采用低温的激冷水以减少出废热锅炉的气体流量以及后续的设备尺寸;工艺(1)的总热效率约为84%,低于采用高温辐射锅炉的Texaco流程;工艺(2)、(3)的总热效率约为90%,与采用合成气激冷方案的Shell和Prenflo流程相当。部分水激冷的方式适合于整体煤气化联合循环发电(IGCC)的粉煤气化。Water partially quenching process of entrained-flow gasification to cool the high temperature syn-gas and melt slag at gasifier outlet was put forward. The performance of three water partially quenching processes of entrained-flow gasification with raw gas cooler was simulated, including （ 1 ） coal-water slurry （CWS） gasification ＋ firebrick lining, （ 2 ） pulverized coal gasification ＋ firebrick lining and （ 3 ） pulverized coal gasification ＋ water lining. The simulation results indicate that the gas flow from raw gas cooler by such processes is less than that by Shell and Prenflo; the quenching water temperature has little effect on the process gross heat efficiency which is composed of the low heat value of sin-gas and the net heat duty of raw gas cooler, so the low temperature of quenching water is proper which can decrease the gas flow and purging equipment size behind raw gas cooler; the gross energy efficiency of CWS gasification （1） is about 84%, which is lower than Texaco process with high temperature radiant cooler; the gross heat efficiency of pulverized coal gasification （2） and （3） is about 90%, which is similar to the Shell and Prenflo process with cooled syn-gas quenching. So, the water partially quenching preprocess is propitious to the pulverized coal gasification for IGCC power generation.

关 键 词：部分水激冷 气流床 煤气化 IGCC 

分 类 号：TQ546[化学工程—煤化学工程]