超优克劳斯硫磺回收工艺停产除硫的优化措施  

Optimal measures against shut-down sulfur removal of euro Claus sulfur recovery process

作　　者：曾云东 伍强 刘军 Zeng Yundong;Wu Qiang;Liu Jun(Chongqing Natural Gas Purification Plant General,PetroChina Southwest Oil&Gasfield Company,Chongqing 400000,China)

机构地区：[1]中国石油西南油气田司重庆天然气净化总厂

出　　处：《天然气技术与经济》2019年第6期51-55,共5页Natural Gas Technology and Economy

摘　　要：为了降低超级克劳斯硫磺回收装置尾气SO2排放总量,某天然气净化厂将超级克劳斯工艺升级为超优克劳斯,过程中为降低超优克劳斯工艺停产除硫期间尾气SO2排放浓度和排放速率,将超级克劳斯反应器旁路运行优化为在线运行,现场试验证明除硫优化措施可行,且通过优化方式改进前后数据对比认为优化措施可提高除硫效果。研究结果表明:(1)将超级克劳斯工艺升级为超优克劳斯工艺是未设置尾气处理系统的现有超级克劳斯工艺改进的最佳方案;(2)改变超优克劳斯工艺停产除硫方式后,超优克劳斯工艺停产除硫期间在线运行超级克劳斯反应器时,尾气SO2排放速率可下降40%;(3)超优克劳斯工艺停产除硫期间在线运行超级克劳斯反应器时,各级反应器温度和过程气中H2S含量是可控的,在除硫时间和除硫效果上是满足工艺要求的;(4)优化除硫方式后除硫时间增加15~20h,尾气SO2排放总量却下降了30%以上,对环境保护具有重要的现实意义。One natural-gas purification plant upgraded its super Claus process to euro Claus process in order to reduce total SO2 emission of tail gas in super Claus sulfur recovery facilities. During this upgrading, some by-pass operation of super Claus reactors was optimized to decrease both SO2 emission concentration and rate during shut-down sulfur removal of euro Claus process. Field tests prove that these sulfur-removal optimal measures are feasible, and data comparison before and after this optimization also indicates that the measures can improve sulfur removal effects. Results show that(1) upgrading the super Claus process to euro Claus process is an optimal method for improving super Claus process without tail processing system;(2) after shut-down sulfur removal mode of euro Claus process is modified, SO2 emission rate can be reduced by 40% when these reactors are operated on line during shut-down sulfur removal of euro Clause process;(3) when on-line operation of reactors is carried out during shut-down sulfur removal of euro Claus process, the temperature and the H2S content of process gas within reactors are controllable and meet technical requirements of sulfur removal time and effect;and(4) after the sulfur removal method is optimized, sulfur removal time is increased by 15-20 h while the reduction of total SO+2 emission is over 30%, which is of practical significance to environmental protection.

关 键 词：天然气 净化 硫磺回收 超优克劳斯工艺 停产除硫 优化措施 

分 类 号：X70[环境科学与工程—环境工程]