电解锰渣煅烧含氨烟气制酸系统的设计

Design of Acid Production System by Calcining Ammonia Containing Flue gas from Electrolytic Manganese Slag

煅烧电解锰渣是实现电解锰渣无害化和资源化的一种处理方式,煅烧后产生的烟气中除了二氧化硫,往往含有大量的氨。氨在烟气制酸净化工段经高效洗涤,溶解在水中,并且与三氧化硫、二氧化硫结合生成硫酸铵、亚硫酸铵、亚硫酸氢铵的混合溶液,在输送和压滤过程中会释放出来刺鼻的气味,严重污染操作环境。本文基于传统制酸工艺,配合氨回收系统,对该类烟气制酸系统的设计进行了介绍和探讨。

Calcination of electrolytic manganese slag is a kind of treatment method to realize the harmless and resource utilization of electrolytic manganese slag.In addition to sulfur dioxide,the flue gas generated after calcination often contains a large amount of ammonia.Ammonia is efficiently washed in the purification section,dissolved in water,and combined with sulfur trioxide and sulfur dioxide to form a mixed solution of ammonium sulfate,ammonium sulfite and ammonia bisulfite.The pungent smell will be released in the process of transportation and pressure filtration,which will seriously pollute the operating environment.Based on the traditional acid making process and ammonia recovery system,this paper introduces and discusses the design of this kind of acid making system from flue gas.