Flour mill dust collector explosion vent (flameless venting device)

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 to prevent flame propagation or explosion escalation. It operates by monitoring gas pressure and temperature changes within pipelines or equipment to detect explosion or fire risks. Upon confirmation of danger, it immediately closes the equipment or pipeline while releasing pressure to safeguard both devices and personnel.

Flour Mill Dust Collector Explosion Vent (Flameless Explosion Venting Device)Brief Introduction:

1. It consists of an explosion vent panel and a flame arrestor 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 production areas but also mitigates secondary explosions, reducing property damage and ensuring personnel safety.

Product Parameters:

Static activation 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, with effective venting area meeting explosion venting requirements;

Product classification: Based on operational conditions, it can be divided into rectangular flameless venting devices and curved flameless venting devices;

Applicable equipment: Dust collectors, bucket elevators, drying equipment, cyclones, dust collectors;

Industries: Wood processing, plastics, spray painting, food and dairy, plastic and dye processing, grain storage and processing, pharmaceuticals, coal processing, brewing, chemicals, metal processing, chemicals, power, cement, and other industries.

Flour Mill Dust Collector Explosion Vent (Flameless Explosion Venting Device)Working Principle:

The flameless venting device consists of two parts—an explosion vent panel and a flame arrestor module. The explosion 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 flame arrestor module. The stainless steel precision 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 flame arrestor module eliminates deflagration flames, reduces the temperature of hot gases, 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 element, heat exchange occurs between the element and the flame, rapidly cooling the high-temperature flame, venting pressure and smoke, while also reducing pressure waves or noise from production 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 cyclones, bag dust collectors, dust collectors, cartridge filters, pneumatic conveying systems, rod or ball mills, bucket elevators, dryers and ovens, roller mills, 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 may cause 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: Prevents flame propagation using an isolation valve.

Suppression: A detection system identifies sparks and triggers a fire suppression system to extinguish flames instantly, preventing explosions.