高含硫天然气硫磺回收及尾气处理工艺技术  

TECHNIQUES OF SULFUR RECOVERY AND TAIL GAS PROCESS FOR GAS WITH HIGH SULFUR CONTENT

作　　者：吕岳琴[1] 丁湘[1] 王以朗[1] 

机构地区：[1]中国石油西南油气田分公司川东北项目部

出　　处：《天然气工业》2003年第3期95-97,共3页Natural Gas Industry

摘　　要：为配合天然气“东输”工程的实施 ,重庆市川东北地区将开发高含硫天然气气田 ,并配套建设大型天然气净化厂。川东北地区拟建 2套 30 0× 10 4m3 /d天然气净化装置 ,其原料气H2 S和CO2 含量高达 10 %和 6 % ,产硫量达到 80 0t/d ,当数国内之最 ,按我国现行环保法规要求 ,硫回收率至少要达到 99.7%以上 ,尾气排放才能达标。这对硫磺回收和尾气处理装置的优化设计提出了苛刻的要求。文章介绍了国外大型硫磺回收及尾气处理技术的最新发展动态 ,并结合国外公司技术交流情况 ,针对预可研推荐的总工艺流程 ,从现场操作管理的角度提出了采用两级Claus转化、溶液串级再生和高效富氧工艺技术等初步建议 ,力争实现净化厂工艺简洁先进、技术成熟可靠、操作安全平稳。Gas fields with high sulfur content will be developed, and big gas treatment plants will be set up in Northeast Sichuan area for the project of 'East forward' gas transmission. Now, 2 sets of 300 × 104m3/d gas purification plants are going to be established in the area.The H2S and CO2 contents of their feed gas reach 10% and 6% respectively. The potential sulfur content reaches 800t/d, which is the most in China. According to the Chinese environment law, the tail gas discharging is allowed only if the sulfur recovery rate reaches above 99.7%. So, severe requirements are made for the optimized design of the sulfur recovery and tail gas process plants. Introducing the new advance of the foreign techniques for sulfur recovery and tail gas process, integrating the technical exchanges with foreign companies and aiming to the general flow chart made from the preliminary feasibility study, the article recommends the proposal to utilize the techniques, such as two-stage Claus, cascaded Scot, and oxygen enrichment process, etc. in order to achieve the targets of higher quality of products, greater reliability in operation, and lower capital and operating costs.

关 键 词：高含硫天然气 硫磺 回收 尾气处理 

分 类 号：X742[环境科学与工程—环境工程]