水煤浆气化过程中氮的转化及系统中NH_(3)含量控制  

Nitrogen transformation and NH_(3) content control in coal water slurry gasification process

作　　者：代厚鑫 张先锋 Dai Houxin;Zhang Xianfeng(China Energy Baotou Coal Chemical Co.,Ltd.,Baotou Inner Mongolia 014000,China)

机构地区：[1]国能包头煤化工有限责任公司,内蒙古包头014000

出　　处：《煤化工》2021年第5期39-43,共5页Coal Chemical Industry

摘　　要：简述了煤中氮元素的存在形式,研究了氮元素在水煤浆气化过程中的转化迁移规律,分析了氮转化产物NH_(3)对气化系统的影响。针对某180万t/a甲醇项目水煤浆气化过程中氮转移造成的灰水高pH、高氨氮含量等问题,提出通过控制原料煤中氮含量、控制反应温度,并对水系统进行操作优化和技术改造等措施,脱除水系统中的NH_(3),实现气化系统稳定运行。The existing form of nitrogen element in coal was briefly described,the transformation and migration law of nitrogen in coal water slurry gasification was studied,and the influence of nitrogen conversion product NH_(3)on the gasification system was analyzed.Aiming at the problems of high pH and high ammonia nitrogen content of grey water caused by nitrogen transformation during coal water slurry gasification of a 1.8 million t/a methanol project,it was proposed to remove NH_(3)from the water system and realize the stable operation of the gasification system by controlling the nitrogen content in raw coal,controlling the reaction temperature,and optimizing the operation and technical renovation of NH_(3)entering the water system.

关 键 词：水煤浆气化 氮元素 氨 原料煤 气化温度 灰水 结垢 

分 类 号：X70[环境科学与工程—环境工程] TQ546[化学工程—煤化学工程]