Flue gas baffle doors can be divided into many types according to different design and application characteristics. Here are some common smoke baffle door classifications:
by structure：
Double leaf shutter baffle door: Consists of a shutter containing two blades with a sealed air system between the blades that allows sealed air to enter to maintain good tightness.
Double shutter flapper door: It is composed of two blinds, each blind is connected with several bearings, the blades are fixed on the same shaft, and the sealing piece is made of special alloy material to seal the air system to ensure zero leakage.
Double sealed shutter baffle door n>: Consists of a single shutter, each shutter contains a blade, and a double sealing sheet is arranged between the blade and the frame, and the sealing air is injected into the frame, which can keep 100% seal even in corrosive environment.
Classification by function：
Original flue gas inlet baffle door: Used in high temperature flue gas environments, usually Located before the flue gas enters the desulfurization system.
Clean flue gas inlet baffle door: Used in purified flue gas environment, with emphasis on anti-corrosion performance.
bypass baffle door: Used for smoke bypass in emergency situations, requiring quick opening, with high reliability, and at the same time need to withstand high temperature and corrosion.
Classification by shape：
Square closing flapper door: Suitable for installation in square or rectangular flues.
Circular closing flapper door: Suitable for installation of circular flues or chimneys.
By Drive：
Manual closing of flapper door: The opening and closing of the baffle is controlled by human operation.
Electric closing flapper door: Remote or automatic control with electric actuators.
Pneumatically closed flapper door: Use compressed air as a power source to control the baffle door.
Hydraulically closed baffle door: The hydraulic system is used to drive the opening and closing of the flapper door.
By Manufacturing Process：
Cast closing flap door: Produced by casting process, suitable for specific applications.
Welded closing flap door: Assembled by welding process for high strength and flexibility.
By Material：
Cast iron closing flap door: Lower cost, suitable for non-corrosive environment.
Carbon steel closing flap door: High strength, suitable for most industrial environments.
Stainless Steel Close Flap Door: Good corrosion resistance, suitable for corrosive smoke environment.
Nickel-based alloy closing baffle door: With extremely high temperature and corrosion resistance, it is suitable for extreme environments.
Each type of flue gas baffle door has its own specific design characteristics and applicable scenarios. When selecting it, it needs to be comprehensively considered according to factors such as flue gas temperature, pressure, corrosiveness and operating requirements.