煤气化变换装置压差增大原因分析与措施
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摘要
针对某煤制油装置运行过程中变换炉床层压差逐渐增大、催化剂活性缓慢下降问题,利用停车机会打开反应器,发现床层上部积灰较多,催化剂颗粒完整。积灰是导致床层压差增大及催化剂活性下降的主要原因。卸出上部约1 m的催化剂过筛回装后,装置运行稳定,满足生产要求。
Considering the gradual increase of pressure differential between beds, and slowly decreased catalyst activity in CO shift converter in coal-to-oil plant, the reactor was opened by taking the chance of shutdown, and it′s found that a lot of ash was accumulated on the upper part of the bed, whereas the catalyst granule was kept intact. The accumulated ash was the main cause leading to increase of pressure differential and decrease of catalyst activity. After unloading the catalyst on the upper part about the thickness of one(1)meter, screening the catalyst, then reloading the catalyst, the operation of the plant became steady, and can meet the requirement of production.
Considering the gradual increase of pressure differential between beds, and slowly decreased catalyst activity in CO shift converter in coal-to-oil plant, the reactor was opened by taking the chance of shutdown, and it′s found that a lot of ash was accumulated on the upper part of the bed, whereas the catalyst granule was kept intact. The accumulated ash was the main cause leading to increase of pressure differential and decrease of catalyst activity. After unloading the catalyst on the upper part about the thickness of one(1)meter, screening the catalyst, then reloading the catalyst, the operation of the plant became steady, and can meet the requirement of production.
引文
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[2]贾化.典型加压煤气化工艺的比较[J].中氮肥,2000,15(2):10-13.
[3]纵秋云.Shell煤气化工艺中甲烷化反应的影响[J].中氮肥,2004,19(3):12.
[4]谢永军,栗玉霞,赵世俊,等.甲醇催化剂中毒原因分析[J].化工催化剂及甲醇技术,2006(6):14-15.
[5]冯如彬,姚宏伟.CuO/Al2O3催化剂中毒与氧吸附[J].应用化学,2001,18(1):73-75.
[6]纵秋云.高浓度CO变换气制甲醇向题的探讨及催化剂选型[J].煤化工,2007,35(3):41-44.
[7]石亚华,李大东.Ni-W-F/y-A12O3催化剂的加氢脱氮动力学[J].石油学报,1991,7(3):28-34.
[8]纵秋云,王迎春.Shell粉煤气化制氨工艺中变换反应的分段研究[J].化肥设计,2005(4):15-17.
[9]吕艳芬.铁对催化裂化催化剂的危害及其对策[J].炼油设计,2002,32(3):42-46.
[10]李小定,陈劲松.Co-Mo系宽温耐硫变换催化剂[J].小氮肥设计技术,2005,26(2):12-17.
[11]龚世斌,魏士新.一氧化碳耐硫变换催化剂技术进展[J].化学工业与工程技术,2002,23(6):33-35.
[12]韩家军,李宁,张天云,等.催化剂中毒原因及预防办法的研究现状[J].电池,2006,36(4):315-316.
[13]WALERIAN A,DARIUSZ M,URSZULA N,et al.Poisoning of iron catalyst by sulfur[J].Catalysis Taday,2007(124):43-48.