LY-WS flue gas desulfurization defogger detergents in the wet flue gas desulfurization, sulfite oxidation is an important side effects. With lime or limestone slurry washing, CaSO4 · 2H2O to scaling become a serious problem on the scrubber and demister. LY-WS-6-type flue gas desulfurization defogger detergents to as slurry scrubbing system defogger detergents, experiments have been validated. It can reduce the gypsum saturation, thereby reducing the scale and improve the performance of the dehydration of calcium sulfite, but also improve SO2 removal efficiency, slowing the degradation of the organic acid additives. The flue gas desulfurization defogger detergents by my company's early, and conduct research. Found that the presence of calcium carbide, which has antioxidant effects. It makes the scale FGD defogger disappear. When pH = 5, detergents content of the flue gas desulfurization defogger as low as 1 mmol able to effectively prevent the oxidation of sulfite and organic acid degradation. After the experimental plant FGD scrubber system, 10 mmol flue gas desulfurization defogger detergents, can greatly reduce the oxidation of sulfite to improve the performance of the dehydration of gypsum, also found that the rapid degradation of S2O3. Further experiments showed, flue gas desulfurization defogger detergents 1mM can effectively reduce the saturation of gypsum, to 3mm when gypsum dehydration, degradation fouling the main reason for the oxidation of calcium sulfite and flue gas desulfurization defogger detergents dissolved. Lime absorber - the limestone washing device made to expand the test to establish the quantitative impact of the flue gas desulfurization defogger detergents for the dehydration of gypsum saturation and solid, and that flue gas desulfurization defogger detergents Add the absence of application of any other oxide slurry washing process are universally valid. A power plant flue gas desulfurization defogger detergents to eliminate 1240 MW of lime slurry defogger gypsum scale, and increase the rate of dehydration of gypsum. Add to expand the flue gas desulfurization defogger detergents the test, lime - limestone slurry scrubbing system does not add a flue gas desulfurization defogger detergents, operation oxidation of calcium sulfite was 17 to 20%, 100% saturation of gypsum, gypsum scale, when added to and maintain the the FGD defogger antifoulant lowest concentration 0.9mm, during the whole operation gypsum saturation is less than 100% without gypsum deposits generated. When FGD defogger antifoulant is maintained at a high level when the rate of the limestone gypsum dewatering system improves, but also increase the SO2 removal rate and limestone utilization, such as limestone systems coexist higher level The chlorine content of the added effect is more prominent, detergents concentration in the the slurry washing system, the rate of oxidation reaction, the flue gas desulfurization defogger Movement complex function, when the FGD demister descaler exist, absorption of oxygen in the controlled oxidation process in the absorber, from the combustion of high sulfur coal flue slurry oxidation rate of approximately 15 to 30%, such as flue gas desulfurization defogger descaler suitable concentration, the oxidation of the slurry may be completely controlled, the oxygen content of the flue gas is 10%, dissolved Lots of approximately 0.1 mm, such as the liquid level is shaking or exposed in the air, the oxygen content increases. The flue gas desulfurization defogger detergents is a way to stop the oxidation of calcium sulfite additives. The barrier oxide efficient than the ratio of the flue gas desulfurization defogger detergents sulfite. And the the FGD slurry defogger descaler barrier oxidation product, the solubility of calcium as well as the tank SO2 catching dose (decision in resistance to oxidation products) substantially proportional. The effect is most obvious in the the higher chlorine limestone scrubbing system. System in the of all slurry was washed in oxidation resistance, even if the flue gas desulfurization defogger descaling product Low to 0.3 x 10-6m3 / h when the gypsum saturation can still be significantly reduced, thereby eliminating the gypsum scale. In flue gas desulfurization defogger detergents high content of limestone scrubbing system, regardless of the existence of organic acids, gypsum dewatering rate improved. Resistance test so that oxidation product of 10-6m3 / h, the the gypsum solids content in the cake was increased from 65% to 85%, while the rate of precipitation from 0.35cm/min 0.65cm/min experiment when barrier The oxidation product of 4 x 10-6m3 / h when the gypsum filter cake solids content of from 55% to 75% from 0.6cm/min sedimentation rate increased to 3cm/min. FGD scrubber added defogger detergents, so that the solution of calcium to maintain the proper amount, can improve the desulfurization rate and limestone utilization. Limestone scrubber net consumption, due to the reduction of the organic acid degradation by co-precipitation with calcium sulfite offset by increases due to join the flue gas desulfurization defogger detergents did not reduce organic acids.