Section 1: Overview of Baffle Door Products
The baffle door is used on the inlet and outlet or bypass flue gas channels of the flue gas absorption tower, or in the flue gas denitrification and dust removal systems. The desulfurization flue gas baffle door typically employs a double-layer baffle structure with louvers. When closed, sealed air is introduced between the double baffles for a gas-tight seal, achieving the function of isolating and shutting off flue gas.
The doors are categorized by shape into square and round single-axis double-gate doors; by drive method into electric and pneumatic single-axis double-gate doors; by installation location into FGD inlet flue gas damper doors, FGD outlet clean gas damper doors, FGD bypass flue gas damper doors, FGD booster fan inlet damper doors, and FGD booster fan outlet damper doors; and by material into carbon steel, stainless steel, and nickel-based alloy single-axis double-gate doors.
Section II: Performance Features of the Baffle Door
The desulfurization flue gas damper utilizes a single-axis driven double-blade damper structure. The double-layer blades are designed with a sealed chamber in the middle to introduce sealed air. This sealed air, at a pressure higher than the flue gas, is channeled into the damper, creating a sealed air isolation layer between the double-layer blades, thereby blocking the passage of the flue gas flow.
2. Flue gas desulfurization damper opening and closing time ≤ 60S (can be selected according to customer requirements).
3. The external design features a linkage mechanism that allows for the simultaneous opening or closing of multiple blades. The shaft seal is separate from the rolling bearing, making adjustments and maintenance easy, and free from bearing corrosion defects.
4. The double-hundred leaf desulfurization flue gas damper design features a rational structure, rigid blades, stable operation, and reliable performance. The seal type of the butterfly damper blades is either elastic or gas seal.
5. The desulfurization flue gas damper door offers various drive options: electric or pneumatic.
The air-sealed fans and door panels are controlled by a mechanical linkage mechanism, ensuring safety and reliability.
Section 3: Desulfurization Flue Gas Damper Structure Features:
The desulfurization flue gas damper door is mainly composed of several parts: the frame, blades, sealing strips, main shaft, bearings, shaft seal, crank and connecting rod mechanism, actuator, and sealing air system (auxiliary system). HuNeng's production frames are made using steel plate stamping or shaped steel welding, while the blades are formed through steel plate stamping and welding. Special elastic sealing structures are in place between the blades and between the blades and the frame. The blades are designed as hollow cavity shapes. When the blades are in the closed position, they first form a mechanical seal barrier on the cross-section of the flue, followed by the introduction of sealing air at a pressure higher than the working medium pressure by a certain margin, creating a high-pressure seal air curtain. This completely separates the front and back of the blades, ensuring the effectiveness of the isolation.
The paddle door hinge employs a sealed structure and bearing, which boasts excellent sealing performance, no leakage, high-temperature resistance, and corrosion resistance. The bearing features automatic alignment and compensation capabilities.
Four. Desulfurization Flue Gas Damper Technical Parameters:
Chimney cross-section: W (width) × H (height) × L (thickness)
2. Applicable Media: Cold and hot flue gas
Design Temperature Resistance: ≤300℃
Design Pressure: ±8500 Pa
5. Leak Rate of Flue Gas: "0"
6. Drive Types: Electric or Pneumatic
7. Power and control requirements: User-selected.
