摘要
某冶炼厂环集烟气脱硫采用钠碱法工艺,制酸尾气脱硫采用活性焦工艺,脱硫装置存在脱硫后尾气无法满足特别排放限值要求(SO_(2)≤100 mg/m_(3),NO_(x)≤100μg/m_(3),颗粒物≤10 mg/m_(3))的问题。本文在论述现有装置运行现状基础上提出优化改造方案。重点论述了离子液脱硫原理、工艺流程、设备选型和系统性能,并针对试生产时出现烟气SO_(2)浓度波动大、尾气排放SO_(2)浓度不稳定、离子液消耗量过大、离子液中硫代硫酸根浓度过高的问题,提出了相应的处理措施。经过优化改造,烟气尾排中SO_(2)浓度低于100 mg/m_(3),大部分时间低于30 mg/m_(3)。实践证明,此次改造脱硫工艺选择正确,设计参数设定合理,装置运行平稳,脱硫达到理想效果。
The collected fugitive gas desulfurization of a smelter adopts the sodium alkali process,and the acid tail gas desulfurization adopts the active coke process.The desulfurization device has the problem that the tail gas after desulfurization cannot meet the special emission limit requirements.This paper put forward the optimization scheme on the basis of discussing the operation status of the existing device(SO_(2)≤100 mg/m_(3),NO_(x)≤100 mg/m_(3),particle content≤10 mg/m_(3)).The principle,process flow,equipment selection and system performance of ionic liquid desulfurization were mainly discussed.In view of the problems of large fluctuation of SO_(2) concentration in flue gas,unstable SO_(2) concentration in tail gas emission,excessive consumption of ionic liquid and high concentration of thiosulfate in ionic liquid,the corresponding treatment measures were put forward.After optimization,the SO_(2)concentration in the tail flue gas was less than 100 mg/m_(3),and most of the time is less than 30 mg/m_(3).Practice has proved that the desulfurization process is selected correctly,the design parameters are set reasonably,the device runs smoothly,and the desulfurization achieves the ideal effect.
出处
《绿色矿冶》
2023年第3期54-58,共5页
Sustainable Mining and Metallurgy
关键词
环集烟气
制酸尾气
优化改造
有机胺
离子液脱硫
collected fugitive gas
acid production tail gas
optimization and Practice
ionic liquid desulfurization
