摘要
目的研究采用氧化吸收工艺的硫磺回收装置尾气焚烧炉操作参数和气体条件变化对SO_(3)生成的影响,以减少尾气焚烧炉中SO_(3)的生成。方法在实验室中利用管式炉模拟尾气焚烧炉研究SO_(3)的生成,采用控制冷凝法测定反应管出口气体中SO_(3)含量。仅在气相条件下研究不同工况和气质条件对SO_(3)生成的影响。结果SO_(2)和O_(2)体积分数增加会增加SO_(3)体积分数,SO_(3)体积分数与反应气体停留时间呈线性关系,在反应体系中引入CS2也能明显提高SO_(3)体积分数,但对SO_(3)生成率无明显影响;反应体系中引入少量CH4也会明显提高体系中SO_(3)体积分数,并提高SO_(3)生成率。结论明确了SO_(3)生成情况与尾气焚烧炉操作参数和气质条件的关系。SO_(3)生成对反应物SO_(2)和O_(2)的反应级数分别为0.87和0.45,SO_(2)氧化过程的表观活化能为69.04 kJ/mol。
Objective The aim is to reduce the formation of SO_(3)in the tail gas incinerator by analyzing the effects of operating parameters and gas conditions on the formation of sulfur trioxide(SO_(3))in the tail gas incinerator of sulfur recovery unit using oxidation absorption process.Methods In the laboratory,the formation of SO_(3)was studied by using tube furnace to simulate tail gas incinerator,and the content of SO_(3)in the outlet gas of reaction tube was determined by controlled condensation method.The effects of different working conditions and gas conditions on SO_(3)formation were studied only under gas phase conditions.Results The increase of SO_(2)and O_(2)volume fraction would increase the SO_(3)volume fraction,and the SO_(3)volume fraction had a linear relationship with the residence time of the reaction gas.The introduction of CS 2 in the reaction system could also significantly increase the SO_(3)volume fraction,but had no significant effect on the SO_(3)formation rate.A tiny proportion of CH 4 in the gas had significant effect on the SO_(3)volume fraction in the system and increase the SO_(3)formation rate.Conclusions It is clarified the relationship between SO_(3)formation and operating parameters and gas quality conditions of tail gas incinerator.The reaction orders of SO_(3)formation to SO_(2)and O_(2)were 0.87 and 0.45,respectively.The apparent activation energy of SO_(2)oxidation process was 69.04 kJ/mol.
作者
赵西
谢武君
李金金
常宏岗
陈世明
丁桐
Zhao Xi;Xie Wujun;Li Jinjin;Chang Honggang;Chen Shiming;Ding Tong(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;National Energy R&D Center of High Sulfur Gas Exploitation,Chengdu,Sichuan,China;Gas Field Development and Management Department,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China)
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2023年第4期1-8,共8页
Chemical engineering of oil & gas
基金
中国石油西南油气田公司博士后项目"克劳斯尾气氧化吸收工艺焚烧炉中硫化物燃烧动力学研究"(B202120)
中国石油天然气股份有限公司科学研究与技术开发项目"含硫天然气硫磺回收及氧化吸收尾气处理关键技术研究(2021DJ2603)。
关键词
含硫尾气
氧化吸收
尾气焚烧
SO_(3)
控制冷凝法
sulfur-containing tail gas
oxidation absorption
tail gas incineration
sulfur trioxide
controlled condensation method
