布袋除尘器脱硫特性试验及机理研究

Tests on the Desulfurization Characteristics of a Bag-type Dust Collector and Related Mechanism Investigation

建立了脱硫反应模型,模型计算结果表明:当YB<0.3时,限制脱硫反应进行的环节是化学反应过程;当YB>0.3时,SO2通过灰层的扩散阻力占主导地位。文中还分析了影响布袋除尘器脱硫效率的因素,发现:布袋除尘器入口SO2浓度对脱硫效率的影响较小;温度升高可以提高布袋除尘器的脱硫效率;对布袋除尘器脱硫效率影响最显著的是烟气的相对湿度。相对湿度增加,脱硫效率急剧增高。Model-3计算结果与试验结果相对吻合较好。

A desulfurization reaction model was set up. The results of the model calculation show that when YB is smaller than 0.3 , a chemical reaction process will limit a desulfurization reaction, and when YB is greater than 0.3, the diffusion resistance of SO 2 passing through an ash layer plays a dominant role. The authors also analyzed various factors, which may affect the desulfurization efficiency of the bag type dust collector. It is found that the SO 2 concentration at the inlet of the bag type dust collector exercises a relatively small influence on desulfurization efficiency. An increase in temperature can increase the desulfurization efficiency of the bag type collector. The relative humidity of flue gases has a most significant effect on the latter's desulfurization efficiency. The desulfurization efficiency will drastically increase with an increase in relative humidity. The calculation results of Model 3 are in relatively good agreement with those of experiments.