Indoor Dust Duct Flame Arrester Flameless Explosion Vent Valve

A flameless explosion venting device is a safety apparatus designed to protect equipment and personnel by automatically shutting down equipment or pipelines during explosions or fires, preventing the spread of flames or expansion of explosions. Its operational principle involves detecting changes in gas pressure and temperature inside pipelines or equipment to determine the risk of explosion or fire. If a hazard is confirmed, the device immediately closes the equipment or pipeline while releasing pressure to safeguard both machinery and personnel.

Indoor Dust Pipeline Flame Arrester Flameless Explosion Vent ValveBrief Introduction:

1. It consists of two parts: an explosion vent panel and a flame extinguishing module;

2. Suitable for flameless venting of dust explosions in indoor equipment, offering high venting efficiency and cost-effectiveness;

3. Effectively blocks flames and heat, providing a safe environment for equipment, buildings, and personnel, while also collecting dust to reduce environmental pollution;

4. Combined use with isolation valves not only prevents pressure waves and flames from propagating to upstream workshop areas but also mitigates secondary explosions, reducing property damage and ensuring personnel safety.

Product Parameters:

Static opening pressure: 0.01 MPa;

Frame material: Carbon steel or stainless steel;

Flame arrestor material: 304SS;

Applicable dust: St1 and St2 dust with Kst ≤ 300 barg*m/s, meeting venting area requirements;

Product classification: Based on application scenarios, includes rectangular flameless venting devices and curved flameless venting devices;

Applicable equipment: Dust collectors, bucket elevators, drying equipment, cyclone separators, dust collectors;

Industries: Wood processing, plastics, spraying, food and dairy, plastic and dye processing, grain storage and processing, pharmaceuticals, coal processing, brewing, chemicals, metal processing, chemicals, power, cement, and more.

Indoor Dust Pipeline Flame Arrester Flameless Explosion Vent ValveWorking Principle:

The flameless venting device consists of two parts—an explosion vent panel and a flame extinguishing module. The vent panel responds rapidly to rising deflagration pressure, opening immediately to reduce pressure. As the expanding fireball passes through the open vent panel, it is intercepted by the extinguishing module. The stainless steel mesh, supported by a frame, acts as a three-dimensional flame trap, extinguishing the flame and preventing propagation, thereby avoiding secondary or multiple explosions. The extinguishing module eliminates deflagration flames, reduces hot gas temperature, and captures both burning and unburned dust passing through the open vent panel.

Simultaneously, pressure waves or noise generated by production equipment are minimized. When flames pass through the mesh flame arrestor, heat exchange occurs, rapidly cooling high-temperature flames, venting pressure and smoke, while also reducing pressure waves or noise from the equipment.

Application Fields:

Widely used in industries such as grain, metallurgy, chemicals, power, light industry, tobacco, pharmaceuticals, machining, and solid waste treatment. Applicable equipment includes cyclone separators, bag dust collectors, dust collectors, cartridge filters, pneumatic conveying systems, rod or ball mills, bucket elevators, dryers and ovens, roller grinding, and buildings.

With increasingly stringent environmental inspections, safety has gained greater attention. Traditionally, explosion vent panels were installed on dust collectors to release overpressure from dust explosions. However, such installations indoors are not permitted by safety regulations due to risks to surrounding personnel and equipment, as pressure waves and flames from explosions could trigger secondary or multiple explosions. Therefore, relying solely on explosion vent panels for dust collectors is unreliable. We recommend using flameless venting + isolation technology (a cost-effective solution) or suppression + isolation technology to ensure production safety.

There are three main methods for dust explosion protection: venting, isolation, and suppression.

Venting: Releases explosion pressure in advance through a pressure relief device to protect equipment from damage.

Isolation: Uses an isolation valve to block the explosion and prevent flame propagation.

Suppression: Detection devices identify sparks and trigger fire suppression systems to instantly extinguish flames, preventing explosions.