选择合理的FGD(脱硫设备)烟气入口温度，并选择与之相配套的防腐内衬，选择与入口烟温，塔内设计温度不相匹配的内衬材料是致命的错误。一般设计FGD能承受原烟气长期160℃短时20min180℃左右的高温烟气工况；吸收塔防腐材料国内目前一般多选择内衬玻璃鳞片2-4mm或内衬丁基橡胶4-8mm，吸收塔入口烟道可选择内衬2mm厚的镍基合金C276材料至少5米区域；塔内螺栓等采用合金1.4529或相当材料；搅拌叶片材质一般可选双相不锈钢（SA2507或相当材料）或合金1.4529，搅拌器轴材质可选为合金1.4529；脱硫区箱体搅拌器采用顶进式搅拌器，材质选碳钢衬胶；
It is a fatal mistake to choose a reasonable flue gas inlet temperature of FGD (desulfurizing equipment), a matching anticorrosive lining, a lining material that does not match the inlet flue gas temperature and the design temperature in the tower. FGD is generally designed to withstand the high temperature flue gas condition of 160 ℃ for a long time and 180 ℃ for a short time; currently, the anticorrosive material of absorption tower is generally 2-4mm lined with glass flake or 4-8mm lined with butyl rubber in China; the inlet flue of absorption tower can be at least 5m lined with 2mm thick nickel base alloy C276; the bolts in tower are made of alloy 1.4529 or equivalent; the material of mixing blade Generally, duplex stainless steel (sa2507 or equivalent) or alloy 1.4529 can be selected, and the agitator shaft material can be alloy 1.4529; the tank agitator in the desulfurization area adopts the top entry agitator, and the material is carbon steel lined with rubber;
低温烟道或接触低温烟气的设备一般多做内衬玻璃鳞片或内衬丁基橡胶防腐及采用FRP，对于GGH低温区可选用搪瓷或玻璃鳞片、内衬合适的合金等，对于高温区的防腐可采用高温玻璃鳞片或内衬合适的合金等防腐材料，所有接触腐蚀液的管道多采用内衬橡胶或用FRP管道等。脱硫系统cl-防腐设计按40000pp考虑。
For low temperature flue gas or equipment in contact with low temperature flue gas, it is generally lined with glass flake or butyl rubber for anti-corrosion and FRP is used. For GGH low temperature area, enamel or glass flake can be selected, and alloy with appropriate lining can be used. For high temperature area, high temperature glass flake or alloy with appropriate lining can be used for anti-corrosion. For all pipelines in contact with corrosive liquid, rubber lined or FRP pipe is used Tao and so on. The CL anticorrosion design of desulfurization system is considered as 40000 PP.