摘要
神华煤直接液化原料煤中的硫元素和催化剂助剂中的硫元素在煤直接液化过程中大部分转化为H2S气体,并分散于中压气、干气、液化气和酸性水中。为满足产品质量和工艺技术指标要求,并回收循环利用硫元素,鄂尔多斯煤直接液化项目采用气体脱硫工艺回收中压气、干气、液化气中H2S气体,装置运行稳定,回收率分别为97.28%、99.92%和99.99%;采用污水汽提工艺分离收集酸性水中H2S气体,回收率达99.6%;脱硫回收和汽提收集到的含H2S酸性气混合后采用Claus硫磺回收工艺将H2S转化成硫磺,平均每年回收硫磺14 683.5 t,硫磺产品作为催化剂助剂供煤液化反应和加氢稳定反应注硫使用,从而实现硫元素循环利用,减少了环境污染。
Sulfur in coal feedstock and catalyst additives most converted to H_2S and went into middle-pressure process gas,dry gas,LPG,and acid water during Shenhua coal direct liquefaction process.In order to meet the requirements of products quality and process condition,the gas desulfurization process was employed by Erdos direct coal liquefaction demonstration plant to recycle sulfur element in gas component.The sulfur recovery rates of middle-pressure process gas,dry gas,LPG reached 97.28%,99.92% and 99.99% respectively.The stripping process was used to removed H_2S from acid water and the recovery rate was up to 99.6%.The H2 S from stripping process and desulfurization process was mixed first,then the H_2S was converted to sulfur by Claus sulfur recycle process and the average recycling quantity was 14 683. 5 t / a.Sulfur product was used as catalyst addictives of coal liquefaction reaction and injected sulfur of hydrogenation reaction to realize sulfur element recycle and reduce the pollution of the environment.
出处
《洁净煤技术》
CAS
2016年第5期95-99,52,共6页
Clean Coal Technology
基金
神华集团科研资助项目(SHJT-13-30)
关键词
煤直接液化
硫元素
污水汽提
气体脱硫
硫磺回收
direct coal liquefaction
sulfur element
stripping process
sulfur removal from gas
sulfur recycle
