【Daily Question】What is the purpose of an explosion-proof door? Which areas require explosion-proof doors? (Participation +2, Correct answer +10 wealth)

Spontaneous combustion of coal powder in the pulverization system can rapidly lead to an explosion, with the explosion pressure reaching approximately 245 kPa. The purpose of installing explosion-proof doors is that in the event of an explosion in the powder grinding system, these doors will break first, allowing gases to be released into the atmosphere and thus reducing pressure within the system. This prevents damage to equipment and safeguards human safety. Generally, explosion-proof doors are designed to withstand a pressure of 147 kPa. The explosion-proof membrane is made of galvanized iron sheet with a thickness of 0.5 mm, or of lead plate with a thickness of 0.6–1.0 mm; cross-shaped grooves equal to half the thickness of the plate are engraved on it. Explosion-proof films can also be made from 3–5 mm thick asbestos sheets. Explosion-proof doors should be installed on the inlet and outlet pipes of the coal mills, on the coarse powder separator, fine powder separator and their inlet and outlet pipes, as well as in front of the coal powder silos, screw conveyors, and powder discharge units. In accordance with relevant regulations, the total area of the explosion-proof door (in mm2) must not be less than 4 times the total volume of the powder preparation system (in m3).

Explosion doors are designed to withstand accidental explosions that occur outside industrial buildings, thereby protecting the lives of people and ensuring that the equipment inside such buildings remains intact, free from damage caused by the shock waves of explosions； Effectively prevents the continuation of the hazards caused by explosions.

Spontaneous combustion of coal powder in the pulverization system can rapidly lead to an explosion, with the explosion pressure reaching approximately 245 kPa. The purpose of installing explosion-proof doors is that in the event of an explosion in the powder grinding system, these doors will break first, allowing gases to be released into the atmosphere and thus reducing pressure within the system. This prevents damage to equipment and safeguards human safety. Generally, explosion-proof doors are designed to withstand a pressure of 147 kPa. The explosion-proof membrane is made of galvanized iron sheet with a thickness of 0.5 mm, or of lead plate with a thickness of 0.6–1.0 mm; cross-shaped grooves equal to half the thickness of the plate are engraved on it. Explosion-proof films can also be made from 3–5 mm thick asbestos sheets. Explosion-proof doors should be installed on the inlet and outlet pipes of the coal mills, on the coarse powder separator, fine powder separator and their inlet and outlet pipes, as well as in front of the coal powder silos, screw conveyors, and powder discharge units. In accordance with relevant regulations, the total area of the explosion-proof door (in mm2) must not be less than 4 times the total volume of the powder preparation system (in m3).

Isolation should be implemented during explosions; explosion-proof workshops need to be equipped with

Explosion doors are designed to withstand accidental explosions that occur outside industrial buildings, thereby protecting the lives of people and ensuring that the equipment inside such buildings remains intact, free from damage caused by the shock waves of explosions； Effectively prevents the continuation of the hazards caused by explosions.

Explosion doors are designed to withstand accidental explosions that occur outside industrial buildings, thereby protecting the lives of people and ensuring that the equipment inside such buildings remains intact, free from damage caused by the shock waves of explosions； Effectively prevents the continuation of the hazards caused by explosions.

Spontaneous combustion of coal powder in the pulverization system can rapidly lead to an explosion, with the explosion pressure reaching approximately 245 kPa. The purpose of installing explosion-proof doors is that in the event of an explosion in the powder grinding system, these doors will break first, allowing gases to be released into the atmosphere and thus reducing pressure within the system. This prevents damage to equipment and safeguards human safety. Generally, explosion-proof doors are designed to withstand a pressure of 147 kPa. The explosion-proof membrane is made of galvanized iron sheet with a thickness of 0.5 mm, or of lead plate with a thickness of 0.6–1.0 mm; cross-shaped grooves equal to half the thickness of the plate are engraved on it. Explosion-proof films can also be made from 3–5 mm thick asbestos sheets. Explosion-proof doors should be installed on the inlet and outlet pipes of the coal mills, on the coarse powder separator, fine powder separator and their inlet and outlet pipes, as well as in front of the coal powder silos, screw conveyors, and powder discharge units. In accordance with relevant regulations, the total area of the explosion-proof door (in mm2) must not be less than 4% of the total volume of the powder production system (in m3).

An explosion-proof door is one of the protection layers in LOPA analysis, used to protect equipment prone to deflagration or detonation, such as heating furnaces. The “three doors and one panel” management of heating furnaces is the most fundamental aspect of daily operational process management.

Room-type boilers that use coal powder, oil, or combustible gases as fuel may experience deflagration or secondary combustion in the furnace or flue gases if not operated properly during ignition or operation, resulting in an increase in pressure inside the boiler. Safety devices that can open automatically to release pressure when it reaches a certain level are installed to protect the boiler’s walls. The purpose of installing an explosion-proof door is to allow for automatic pressure release in the event of a minor explosion in the furnace or flue, thereby preventing the accident from escalating and protecting the safety of industrial steam boilers, especially their furnace walls. Explosion doors are generally installed on the side wall of the boiler furnace, at the top of the flue outlet from the furnace, or on sections of the pipeline that are easy to access for maintenance.

The heating furnace is equipped with explosion vents to release pressure, reduce the force of an explosion, and protect the equipment.