Abgasrohr Dämpfer

1. Usage and Performance Parameters / Brief Structure The blade type damper was design improved and manufactured according to CE Company Technical Standard. Which mainly used in flue gas system piping of the boiler unit, which be with low consistency of dust and not strict requirements of leakage in fired power plant and take effect of intercepting and isolating. Which has two function of open-fully and close-fully, driving torque is little, and has preferable seal measure endure higher operating pressure and temperature. Angle of blade open / close is 90 degree. The blade type damper generally arranged in the in/outlet pipe of the air preheater flue gas silo and air silo, in/outlet flue gas pipe of dust catcher and induce draft fan, outlet wind pipe of blower and the first fan, and the first/second wind pipe of coal mill in boiler flue gas system. The damper performance parameter is the system operating pressure (i.e. the blade in/outlet pressure value) and operating temperature, the max. operating pressure shall be less than 50K Pa, and the max. operating temperature shall be less than 400 degree in general, which shall be design specially if the parameters exceed the above range. The blade type damper made of steel plate molding welded structure, mainly made of two parts i.e. damper body and actuator. Damper body made of exterior frame, blade, seal piece, fore-and-aft bearing and blade connecting bar etc., the frame was made of U bar or steel plate molding welded, equipped with supporting tubes for large cross section frame to supply enough intensity and rigid. Take seal measures between blade each other, as well as touching place of blade and frame, use elastic adjustable slice type, seal material shall be anti-corrosion, abrasive and need not to be replaced during entire life, and adopts 1Cr18Ni9Ti. Use axes-adjusted and self-lubricated bearing as the blade damper bearing in order that the blade could rotate flexible during operation. Driving style of the blade type blade use electric and pneumatic actuator, which shall be equipped with distant control or local control device. The damper of this project will be controlled by the pneumatic actuator, the related technical parameters please see the manual of the pneumatic actuator. 2. Engineering Parameters 3. Installation and Storage a. Installation 1) Damper will be divided into two modules ( NO.PN801A-01/PN801A-02and NO.PN801B-01/PN801B-02) for convenient of fabrication and transportation. 2) Place the two modules of one damper horizontally on site and assemble it according to the assembly drawing. Connect the joint plates of two modules with bolts (M22×55) in order to align the damper, after this fasten the bolts. 3) The butt seam will be removed rust and welded after being aligned, the plain flanges (NO.PN801A-03/PN801B-03) of the damper will be welded and the seal material of the flange surface will be placed. 4) Installation of the pull rod device (NO.PN801A-04 / PN801B-04): put the damper blade into “off” position, adjust screw length of the pull rod and install it (NO.PN801A-04/PN801B-04) on the drive arm, connect the linker bar of the two modules. Adjust all the locknuts of the linker bar to ensure opening degree of each shaft blade could meet synchronization at the ”on” / ”off” position. 5) Inspect the SS seal pieces of each blade and which shall be adjusted by hand or spanner if not seal or became distortion. 6) Keep identical flow direction of the damper marked with the actual direction of the piping during assembly in order to ensure the damper close tighten. 7) Weld the damper flange with the flue gas pipe after finishing damper installation. 8) Settle the cylinder (NO.PN801A-05/PN801B-05) on the actuator seat. 9) Connect the cylinder and control cabinet, and switch on the power source. Connect the control circuit as per the actuator electric diagram to ensure meet each action requirements of damper. 10) Damper arrangement for this project is symmetrical and with KKS Code. b. Delivery Requirements 1) Damper shall be placed and transported horizontally, it is allowable to lap over. 2) Damper had been fixed with fasteners before shipment to avoid blade movement during transportation, the fasteners shall be removed after installation. c. Storage 1) The damper body could be placed horizontally in the open air, but waterproof cloth is necessary when raining. 2) The actuator should be stored in the storehouse. d. Adjustment Adjustment shall be done by manufacturer after production finish as follows: 1) Adjust the clearance between the seal parts until which meet the drawing requirement. 2) Check and adjust the position of the limit parts. Adjustment shall be done on site assembly as follows: 1) Adjust the blade until complete all the assembly and welding, ensure the blade rotate flexibly. 2) Check the seal pieces before installation, and repair the damage or distortion occurs during transportation in time. 3) Check the actuator turning direction if accord with the damper on/off direction, if not please adjust the actuator finger and make the same direction with the damper. 4) Fix the pneumatic actuator and connecting bar after the blade rotated flexibly. 4. Operation and Maintenance 1. It is unnecessary to pour grease into the bearing because this damper bearing is the axes-adjusted and self-lubricated type. Pour appropriate lubrication into it (type is mobilgrease XHP222 or mobilith SHC220) every two or three months. 2. Start up and close down each damper several times to check the blocking etc. matters before stopping work, check the fault reason and repair or change it if found such as the seal slice became deformed. 3. Open the bearing filling and Check the seal cord in the bearing seal device and keep it touch with the shaft neck, press tighten the cover or change the seal cord if loose found. 4. Check the bearing of pull rod if has been damaged or blocked, and pure normal lubrication into it. 5. Maintain it according to the actuator manual. 5. Structure of Bearing 6. Damper Outline Drawing