摘要
主要介绍了钠碱法脱硫工艺成功应用于阳极炉烟气的洁净化治理。创新性的应用了集成式脱硫塔,将烟气净化、降温、吸收集成于一台脱硫塔,在后端设置尾气吸收塔作为保安塔,系统脱硫效率能够保证在96%以上,在运行过程中应用了双介质脱硫工艺,使无水亚硫酸钠生产过程中废液得到充分的利用,通过强制串液的方式将尾气吸收塔液碱二次循环使用,年可节约新水消耗20 kt,减少液碱消耗400 t,同时研究了Na_2SO_4结晶的临界控制点,通过降低吸收液Na_2SO_4过饱和度、控制吸收pH值、控制循环液温度、优化碱液浓度等方式,减少了吸收过程中结晶现象。
Desulphurization process by sodium alkali method successfully applied to the anode furnace flue gas clean treatment is described. The flue gas purification, cooling, absorption were integrated in a desulphurization tower, becoming an integrated desul-phurization tower innovatively. Tail gas absorber set in the back as a security tower, and the desulphurization efficiency of system can be guaranteed more than 96%. In the course of the operation, a dual - media desulphurization process was used to make sure the waste iquid in the Na2S03 production process fully utilized. The way of forcing cross - acid made the liquid alkali secondary cycle, saving he new water consumption of 20 kt and reduce alkali consumption of 400 t per year. The critical control point of Na2S04 crystallization s investigated. By reducing the supersaturation of Na2S04 absorbing liquid, controlling the pH value, controlling the temperature of the circulating liquid, optimizing the alkali concentration, crystallization in absorption process was reduced.
出处
《硫酸工业》
CAS
2017年第8期55-58,共4页
Sulphuric Acid Industry
关键词
阳极炉
烟气脱硫
集成式脱硫塔
钠碱法
结晶
anode furnace
flue gas desulphurization
integrated desulphurization tower
sodium alkali method
crystallization
