EPCB Boiler is a professional boiler manufacturer in China. Focus on industrial boiler production and sales for 68 years. Our main products are coal-fired boilers, oil gas boilers, biomass boilers, electric boilers, and power plant boilers.
When the boiler uses biomass as fuel, if the operation is improper, it is very likely that the furnace will deflagrate together, or even a partial explosion of the boiler may occur, causing great damage. Therefore, in addition to the safety interlock protection device, the boiler must also be equipped with explosion-proof doors in the furnace area, flue area and other areas to reduce the damage to boiler equipment caused by deflagration or explosion.
The types of boilers that usually require explosion-proof doors are: pulverized coal boilers, gas/oil-fired boilers and biomass-fired boilers.
Explosion-proof doors should be set in the coal mill, pulverized coal silo and flue. In addition, explosion-proof doors should also be set at the furnace.
Set explosion-proof doors in the furnace area and the flue area where combustible gas is easy to accumulate.
Set explosion-proof doors in the furnace area and the flue area where combustible gas is easy to accumulate.
1. Gravity explosion-proof door
2. Spring-loaded explosion-proof door
3. Diaphragm type explosion-proof door
4. Water-sealed explosion-proof door
Advantages: The structure and manufacture are relatively convenient, and it can be reset automatically after pressure relief, which is widely used in oil-fired gas boilers.
Disadvantages: It is difficult to seal, and it is easy to cause air leakage.
Advantages:It can be reset automatically, has good sealing performance, has a quick jump-off response, is suitable for different types of boiler products, and has low manufacturing difficulty and manufacturing cost.
Disadvantages: If the pressure generated by the deflagration is too large, the explosion-proof door will be damaged because it cannot withstand the impact.
Advantages: simple structure, convenient design and manufacture.
Disadvantage: Once the diaphragm type explosion-proof door is activated, it cannot reset itself, and the tightening device must be opened to replace the diaphragm.
Advantages: The structure is simple to manufacture, and it has good sealing performance. It is used for boilers operating under micro-positive pressure.
Disadvantage: Once the pressure is released, the outer cylinder needs to be refilled with water. When the boiler is working normally, water needs to be replenished to ensure the water level of the outer cylinder is stable.
Different types of explosion-proof doors have their own characteristics. Therefore, different types of explosion-proof doors should be designed and selected according to different boiler furnace types, boiler fuel and operating conditions. At the same time, attention should be paid to the design calculation, installation, daily inspection and maintenance of explosion-proof doors.
Further Reading:
Boiler Guidance----Acceptance After Boiler Installation
Industrial Boiler Low Load Operation Hazards,Causes and Solutions
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