Flameproof Pressure Relief Device for Chemical Plants (Flame-Free Explosion Vent)

A flame-free explosion venting device is a safety apparatus designed to protect equipment and personnel. It automatically shuts down equipment or pipelines in the event of an explosion or fire, preventing the spread of flames or escalation of explosions. Its operational principle involves monitoring changes in gas pressure and temperature inside pipelines or equipment to detect potential explosion or fire hazards. If a threat is confirmed, the device immediately closes the equipment or pipeline while releasing pressure to safeguard both machinery and personnel.

Chemical Plant Explosion Venting Device (Flame-Free Explosion Vent) Brief Introduction:

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

2. Suitable for indoor equipment dust explosion flame-free venting. High venting efficiency, cost-effective and practical;

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 an isolation valve 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 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, effective venting area meets explosion venting requirements;

Product classification: Based on application scenarios, it can be divided into rectangular flame-free explosion venting devices and curved flame-free explosion venting devices;

Applicable equipment: Dust collectors, bucket elevators, drying equipment, cyclone separators, 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.

Chemical Plant Explosion Venting Device (Flame-Free Explosion Vent) Working Principle:

The flame-free venting device consists of two parts—an explosion vent panel and a flame extinguishing module. The explosion vent panel responds to rapid increases in deflagration pressure, opening immediately to reduce pressure. When the expanding fireball passes through the open vent panel, it is intercepted by the flame extinguishing module. The precision 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 flame 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 significantly reduced. As flames pass through the mesh flame arrestor element, heat exchange occurs, rapidly cooling high-temperature flames, venting pressure and smoke, while also reducing pressure waves or noise from production equipment.

Application Areas:

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

With increasingly stringent environmental inspections, safety has become a major concern. In the past, explosion vent panels were commonly installed on dust collectors to release overpressure caused by dust explosions. However, installing such devices indoors is not permitted by safety regulations, as it endangers nearby personnel and equipment. Pressure waves and flames from explosions may trigger secondary or multiple explosions, posing risks. Therefore, relying solely on explosion vent panels for dust collectors is unreliable. We recommend using flame-free 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 venting device to protect equipment from damage.

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

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