煤气化装置脱氨系统的优化与改造  

Optimization and Revamping of Deamination System for Coal Gasification Unit

作　　者：郭利[1] 刘文强[1] 雷洁琼 孙鸣[3] 

机构地区：[1]北京石油化工工程有限公司西安分公司,西安710059 [2]西安道特石化工程有限公司,西安710077 [3]西北大学化工学院,西安710069

出　　处：《化工设计》2018年第3期23-24,共2页Chemical Engineering Design

基　　金：国家自然科学基金面上项目(21776229);国家自然科学基金青年科学基金项目(21406178)

摘　　要：某厂煤气化装置以煤浆为原料制取CO和H_2,采用低温甲醇洗工艺脱出产物中的CO_2和H_2S等酸性气体,该过程中由于氨含量过高生成碳酸氢铵和(NH_4)_2S,造成过滤器、导压管和输送酸性气体管道堵塞,同时发现净化气中硫化氢含量有超标现象。通过对煤气化装置氨回收系统的改造,控制低温甲醇洗甲醇溶液中氨的浓度来降低氨对低温甲醇洗工艺的影响,从而提高低温甲醇洗的效率。The coal gasification unit of a plant uses coal slurry as raw material to produce CO and H_2,and adopts Rectisol process to remove the acid gases such as CO_2 and H_2S in the product. During the process,ammonium bicarbonate and(NH_4)_2S are generated due to high ammonia content,which causes the piping blockage of the filter,pressure tube and the acid gas transfer pipeline. At the same time,it is found that the content of hydrogen sulfide in the purified gas exceeds the standard. Through the revamping of the ammonia recovery system of the coal gasification unit,the ammonia concentration in the methanol solution of Rectisol is controlled to reduce the influence of ammonia on the Rectisol process,thereby to improve the efficiency of the Rectisol.

关 键 词：煤气化 氨回收系统 低温甲醇洗 

分 类 号：TQ545[化学工程—煤化学工程]