The baffle door has a double-blade structure, and each baffle blade is surrounded by stainless steel sealing sheets. When the baffle door is closed, seal air is injected between the double-layer blades to effectively isolate the front and rear media. Baffle doors are widely used in power plant desulfurization systems.
Today we talk about the design principles and technical requirements of baffle doors:
The inlet and outlet flue gas damper doors are respectively installed in the inlet and outlet flues of the FGD system. Both are composed of double-layer flue gas damper doors. When the FGD system flue is closed, the double-layer flue gas damper doors are connected and sealed. The air prevents the flue gas from leaking into the FGD to ensure that the anticorrosive rubber lining in the FGD system is not damaged. The bypass damper door is installed in the boiler concrete horizontal flue. When the FGD system is running, the bypass damper door is closed. At this time, the bypass double-layer damper door is connected with sealed air. The opening of the bypass flue gas damper door can ensure the normal operation of the boiler and protect the equipment safety of the FGD system.
In order to make all baffle doors have 100% air tightness at the design pressure and design temperature, the baffle doors are equipped with a sealed air gap, and are equipped with a sealed air station (including a sealed fan and a backup fan), and the pressure of the sealed air is at least The maximum flue gas pressure is 0.5KPa. In order to prevent cold air from entering the flue gas system and causing low-temperature corrosion, a secondary electric heater is installed at the outlet of the sealed fan. The electric actuator of the damper door is safe, and its speed is required to meet the operation requirements of the power plant and the induced draft fan. All baffle doors require flexible operation, reliability and convenient maintenance.