为了研究湿法脱硫后烟气提水能力及污染物脱除效果，采用理论计算和实际测试相结合的方法，针对某660 MW机组在不同工况下进行相关试验。对比分析发现试验工况下实测烟气提水能力分别为121.24，81.42，93.15和70.43 t/h，对应的理论烟气提水能力分别为165.73，108.94，133.28和88.12 t/h，实际烟气提水量与理论烟气提水量的比值介于0.7~0.8之间。100%负荷下烟气提水装置开启后SO3脱除率由51.2%上升到92.9%，固体颗粒物质量浓度降低33.3%；50%负荷下SO3脱除率由11.1%上升到24.5%，固体颗粒物质量浓度降低34.9%。研究表明：实际烟气提水量与理论烟气提水量的偏差一方面是由于烟气提水装置不能完全除雾，另一方面是环境参数、烟气参数和煤质参数等变化影响提水量理论计算结果。烟气提水装置对污染物脱除具有促进作用。

In order to study the capacity of flue gas water recovering and the effect of pollutant removal after wet flue gas desulfurization (FGD),the relevant tests were carried out for a certain 660 MW unit under different experimental conditions by the combined method of theoretical calculation and practical measurement.By the comparative analysis it was found that the measured capacities of flue gas water recovering were 121.24 t/h,81.42 t/h,93.15 t/h and 70.43 t/h respectively under the experimental conditions,and the corresponding theoretical capacities of flue gas water recovering were 165.73 t/h,108.94 t/h,133.28 t/h and 88.12 t/h respectively,so the ratio of actual flue gas water recovering volume to theoretical flue gas water recovering volume was between 0.7 and 0.8.The removal rate of SO3 increased from 51.2% to 92.9%,and the mass concentration of solid particles was reduced by 33.3% under 100% load after the flue gas water recovering device was turned on.Similarly,the removal rate of SO3 increased from 11.1% to 24.5%,and the mass concentration of solid particles was reduced by 34.9% under 50% load.The research results show that one aspect of the reasons of deviation between the actual flue gas water recovering volume and the theoretical flue gas water recovering volume is because the flue gas water recovering device can't be defogged completely,and the other aspect of those is because the changes of environmental parameters,flue gas parameters and coal quality parameters affect the theoretical calculation results of flue gas water recovering volume.The flue gas water recovering device can promote the removal of pollutants.

TK221