1、 Overview of desulfurization damper
Taige brand double shutter damper damper is manufactured by introducing advanced technology from abroad. The damper is used in the inlet and outlet of absorption tower or bypass flue of flue gas desulfurization system, or used in flue gas denitrification and flue gas dust removal system. The shutter type double baffle structure is usually adopted for the damper. When the damper is shut off, the double-layer baffle is connected to seal to realize the function of isolating and shutting off flue gas.
2、 Performance characteristics of desulfurization damper
1. A single shaft driven double louver baffle structure is adopted. A seal chamber is designed in the middle of the double-layer blades to introduce the sealing air. The sealing air higher than the flue gas pressure of 500pa is passed into the baffle to form a seal air isolation layer between the double-layer baffles to block the flow of flue gas.
2. The opening and closing time of damper is less than or equal to 60s (can be selected according to user requirements).
3. Connecting rod mechanism is designed outside to make several blades open or close synchronously.
4. The design structure of double shutter baffle door is reasonable, the blade rigidity is good, and the operation is stable and reliable. The seal type of shutter baffle blade is elastic seal and gas seal.
5. The sealing air inlet valve is installed on the double baffle, and the sealing efficiency of the baffle door is 100% after the sealing air is injected.
6. Driving mode: pneumatic or electric.
7. The driving device is usually directly connected with the air door.
8. The electric device adopts electromechanical integration products, with torque protection and limit device, and can be operated remotely. The electric device also has manual and electric switching function for installation, debugging and maintenance.
9. Connection mode of damper and pipe: flange sealing welding connection or flange bolt connection.
10. The sealing fan and electric heater of the sealing air system can be provided by our company after selection.
3、 Technical parameters of desulfurization damper
1. Flue section: D (width) × w (height) × L (thickness); or diameter of circular flue D;
2. Applicable medium: cold and hot flue gas;
3. Design temperature resistance: ≤ 300 ℃;
4. Design pressure: ± 8500pa;
5. Internal and external leakage rate of flue gas: "0"
6. Driving mode: electric or pneumatic
7. Power supply and control requirements: to be selected by users.
4、 Supply scope of tiger power desulfurization damper door
The material is polytetrafluoroethylene, which is used to seal the blade shaft end of baffle gate to prevent flue gas leakage. The packing has the advantages of corrosion resistance, wear resistance, self lubrication, small friction coefficient and good sealing effect.
It is divided into electric heater and steam heater. The stepless automatic temperature regulation can save energy consumption and prolong service life. The power is 50 ~ 300kW.
3) Sealing plate
The seal structure of our company adopts the patent technology of independent research and development. After special treatment, the alloy steel seal has good mechanical strength, good elasticity and corrosion resistance. Its self reinforced structure can effectively guarantee the sealing performance of the equipment for a long time. Can also be customized according to customer requirements.
4) Sealing fan and accessories
Including motor, mounting base, outlet square connection circle, expansion joint. Q=800～15000m3/h P=3000～5500Pa。
Separate the type of closing and regulating. There are two kinds of electric and pneumatic, the fastest switching time can reach 10s. N=600～32000N.M。
6) Butterfly valve
With the characteristics of zero leakage, it can prevent the backflow of flue gas and protect the sealed pipe system from corrosion. DN 125 ~ dn450 (temperature resistant / anti-corrosion type)
7) Limit switch
The imported Omron limit switch has a service life of more than 300000 times and stable operation. The length and direction of the swing rod can be adjusted.
8) Bearing with seat
Domestic high-quality spherical self-aligning ball bearing with square seat is used for vane drive shaft of damper gate. It can be automatically self-aligning within a certain angle range, with flexible rotation, long service life and easy replacement and maintenance.
5、 Notice for ordering desulfurization damper door:
1. Provide the size of flue interface and the installation position of pipeline (horizontal pipe or vertical pipe);
2. Flue gas parameters;
3. Opening and closing time requirements;
4. Connection mode: flange plane butt welding connection or flange bolt connection;
5. Anti corrosion material requirements (nickel base alloy or acid resistant stainless steel);
6. Operation mode: electric or pneumatic (drive device brand requirements);
7. The use and position of damper in the pipeline;
8. Before ordering, the supplier shall provide the general installation drawing to the demander for confirmation.
6、 Description of desulfurization damper
1. Due to the sulfur dioxide in the air duct, it is easy to corrode, so it is designed and made of Q235 wrapped 316L material, which has the characteristics of temperature resistance, corrosion resistance and long service life.
2. In order to prevent the door panel from deformation under high temperature, the stiffeners are set between the double-layer plates, the thickness of single-layer plate is 5mm, and the total thickness of damper is 600mm. The valve shaft head, bearing bush, shaft sleeve and shaft are made of several different high temperature resistant, wear-resistant and corrosion-resistant materials.
3. The electric device is connected with the air valve shaft, and there is no gap. After closing, the air leakage rate is less than 0.1%.
4. The electric device is equipped with multi-functional limit device, and the switch is in place accurately.
5. DCS interface is set in the distribution cabinet to achieve the effect of automatic operation.
6. The utility model has the advantages of adjustment, isolation and sharing, flexible adjustment and good isolation performance.
7. The switch is flexible without jamming, internal leakage and external leakage, and the shaft seal is in good condition.
8. High degree of automation, with remote, close range and manual operation functions.
9. The manufacturing process is in line with the relevant industry standards.
Circulating fluidized bed related products of our company:
Square flue gas desulfurization damper
Square desulfurization baffle door
Circular desulfurization baffle door
Circular shutter desulfurization baffle door