垃圾焚烧烟气旋转喷雾干燥净化的实验研究

Experimental Study on Purification of Waste Incinerator Flue Gas by Rotating Spray Drying

针对垃圾焚烧烟气量小、组分中SO2较少、HCl较多的特点,建立了垃圾焚烧烟气旋转喷雾干燥法净化实验系统,并测试了在系统设计和运行中主要可控参数对脱硫脱氯效率的影响。结果表明:旋转喷雾干燥法对HCl的脱除率较高,对SO2的脱除率较低,但可满足对垃圾焚烧烟气中SO2浓度的要求,同时可以保证较高的脱氯效率,特别适用于垃圾焚烧烟气净化;提高化学计量比、喷水量、喷雾器转速,降低烟气流速都可以提高脱酸效率。

An experimental system, for purifying flue gas of waste incinerators by rotating spray drying, has been set up, which takes into account the particular fact, that the gas quantity is small and contains relatively little SO2 , but relatively much HC1. The influence, of the main controlable system design and operation parameters, on desulphurization and dechlorination efficiency have been test determined, Results show that the rotating spriay drying method is more efficient in dechlorination and less in desulphurization, Nevertheless, considering the particularities of waste incinerator flue gas, this method meets the restrictive demands on emitted SO2 concentration and is simultaneously able to warrant a higher dechlorination efficiency. It is therefore particulavely suitable for flue gas cleaning in waste incineration. The flue gas purification efficiency can be enhanced by increasing the stoichiometric ratio, by injecting more water, by increasing the atomizer＇s rotatary speed and by reducing flue gas velocity.