影响可再生烟气脱硫法的再生因素分析

Analysis on Regeneration Factors of Renewable Flue Gas Desulfurization

可再生烟气脱硫法具有吸收剂可重复使用、二氧化硫可回收且不产生二次污染、原料消耗量小等很多优点,但仍然存在吸收剂再生问题。本文综述了几种典型的可再生烟气脱硫法的反应原理、存在的问题以及解决方法,并重点讨论了亚硫酸根氧化生成热稳定盐(HSS)导致可再生吸收剂再生能力降低、硫资源回收减少的影响因素以及应对策略,同时指出其主要影响因素是烟气含起催化作用的杂质、反应温度以及副反应的发生,应对策略主要有采用吸收剂脱硫前除尘、适当控制反应条件、加入有效添加剂和对已生成的热稳定盐进行处理等。该研究可为吸收剂再生问题研究提供参考。

The method of renewable flue gas desulfurization has many advantages,such as reusable absorbents,the recycling of sulfur dioxide,no secondary pollution and low consumption of crude materials.However,there are many problems with the regeneration process of absorbents.This paper summarizes the principles,existing problems and solutions of several typical regeneration methods.In particular,the paper mainly discusses the influencing factors and relevant strategies of the generation of heat stable salts（HSS）from sulfite oxidation,which decreases the absorbents regeneration capacities and the recycle of sulfur resource.The main factors are catalytic impurities in the flue gas,reaction temperature and secondary reactions.The strategies include dusting before absorption,controlling reaction conditions properly,using effective additives and treating generated HSS.In addition,this work can provide reference for future research on absorbents regeneration.