First, the desulfurization of flue gas desulfurization flue damper Overview damper is Huaneng Power Auxiliary Co., Ltd. Lianyungang, the introduction of technology, manufacturing, absorber systems for flue gas inlet and outlet or bypass flue or flue gas denitrification and flue gas dust removal system, the desulfurization of flue gas damper usually louvered double baffle structure, the off gas through the sealed air seal between the double baffles isolation off smoke effect. According to the shape can be divided into square and round uniaxial double damper uniaxial double damper; according to the driving mode can be divided into electric and pneumatic damper uniaxial uniaxial double double flapper door; it can be divided according to the use position FGD inlet baffle original flue damper, FGD flue gas damper damper net exports, FGD flue gas damper bypass damper, FGD booster fan inlet baffle damper and FGD booster fan outlet damper damper and the like; can be divided according to the material carbon steel single-axis double flapper door, stainless steel single-axis double flapper door and nickel alloys type uniaxial double damper. Two desulfurization of flue gas damper Features: 1. desulfurization flue damper using the single drive double louvered baffle structure, intermediate double blade designed with imported seal air sealing chamber, the flue gas will be higher than the pressure Sealing air to the baffle, forming a double barrier seal between the air isolation layer, block by flue gas stream. 2. desulfurization of flue gas damper opening and closing time ≤60S (selected according to user requirements). 3. The external design of the link mechanism, so that the number of blades synchronously opened or closed, the seal means and the Rolling separate adjustment and easy maintenance, no worries bearing corrosion. The flue gas desulfurization double louvered damper design reasonable structure, rigid blade, stable and reliable, louvered shutter blade seal type elastomeric seal or gas seal. 5. Available in various desulfurization of flue gas damper Drive: electric or pneumatic. 6. Fans and air sealing door using a mechanical linkage control, safe and reliable. Third, the desulfurization of flue gas damper Features: desulfurization of flue gas damper consists of the frame, the blades, the sealing sheet, spindle, bearings, seals, crank linkage, actuators, seal air system (secondary system) composed of several parts. Huaneng produce molded frame is made of steel or solder type just forming, welding blades made of steel forming die. Between the blade and the blade between the blade and the frame has a special elastic sealing structure made of hollow cavity type blade when the blade is in the closed position, the flue truncated surface forms a mechanical seal barrier first, then pass into the pressure is higher than Working medium pressure certain amount of sealing air, forming a high pressure seal air curtain, front and rear blades completely separate partition to ensure 100% results. Huaneng damper journal at the use of special sealing structure and special bearings, special seal structure good sealing performance, no leakage, high temperature, corrosion-resistant, special bearings with self-aligning and automatic compensation. Four desulfurization of flue gas damper technical parameters: 1. Flue-section: W (width) × H (height) × L (thick); 2. Applicable medium: cold and hot flue gas; 3. Design temperature: ≤300 ℃; 4. Design pressure: ± 8500Pa; 5. inside and outside the flue gas leakage rate: "0" 6 Drive: electric or pneumatic; 7. Power and control requirements: selected by the user.