选择性催化氧化法在神华吐鲁番兰炭项目中的改进方案

Improvement Scheme based on Selective Catalytic Oxidation in Shenhua Turpan Semi-coke Project

在硫磺回收技术中,低于5%浓度的酸性气,不适用大规模的克劳斯工艺。本文基于神华吐鲁番兰炭项目低浓度酸性混合气H2S浓度在2%~3%(V%)特点,且采用选择性催化氧化法设计的基础上,借鉴同类技术反应器出现反应不完全的现状,后续增设了加氢还原、克劳斯转化、烟气脱硫技术模块进行普适性改进和完善,破解了低浓度酸性气在神华吐鲁番兰炭项目脱硫设计中尾气达标排放的难题,为正常工况下尾气近零排放提供了解决方案。

In sulfur recovery technology,acid gas with concentration less than 5%is not suitable for largescale Claus process.Based on the characteristics of 2%~3%(v%)hydrogen sulfide concentration of low concentration acid gas mixture in Shenhua Turpan Semi-coke project,and based on the design of selective catalytic oxidation method,and referring to the current situation of incomplete reaction in the reactor of similar technology,this paper added three technical modules of hydrogenation reduction,Claus transformation and flue gas desulfurization for general improvement and improvement,cracked the problem The problem of low concentration acid gas emission up to standard in the desulfurization design of Shenhua Turpan Semicoke Project provides a solution for near zero emission of tail gas under normal conditions.