Flame-free explosion venting device for plastic and dye processing

A flame-free explosion venting device is a safety apparatus designed to protect equipment and personnel by automatically shutting down equipment or pipelines in the event of an explosion or fire, thereby preventing the spread of flames or the escalation of an explosion. Its operational principle involves detecting changes in gas pressure and temperature inside pipelines or equipment to assess the risk of explosion or fire. If a hazard is confirmed, the device promptly closes the equipment or pipeline while releasing pressure, achieving the goal of safeguarding both equipment and personnel.

Flame-Free Explosion Venting Device for Plastic and Dye ProcessingBrief Introduction:

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

2. Suitable for indoor equipment dust explosion flame-free venting. High venting efficiency, economical 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 explosion isolation valves not only prevents pressure waves and flames from propagating to upstream workshop production areas but also curbs secondary explosion incidents, 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 usage conditions, 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;

Application industries: Wood processing, plastics, spraying, food and dairy products, plastic and dye processing, grain storage and processing, pharmaceuticals, coal processing, brewing, chemicals, metal processing, chemicals, power, cement, and other industries.

Flame-Free Explosion Venting Device for Plastic and Dye ProcessingWorking Principle:

The flame-free venting device consists of two parts—an explosion vent panel and a flame quenching module. The explosion vent panel responds to rapid increases in deflagration pressure, immediately opening to reduce pressure. When the expanding fireball passes through the open vent panel, it is intercepted by the quenching 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 quenching 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. As flames pass through the mesh flame arrestor, heat exchange occurs between the arrestor and the flames, rapidly cooling the high-temperature flames, 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 cyclone separators, bag dust collectors, dust collectors, cartridge filters, pneumatic conveying systems, rod or ball mills, bucket elevators, dryers and ovens, roller mills, buildings, etc.

With increasingly stringent environmental inspections, safety is gaining more attention. In the past, explosion vent panels were commonly installed on dust collectors to vent overpressure caused by dust explosions. However, such installations on indoor equipment are not permitted by safety regulations because they endanger surrounding personnel and equipment. The pressure waves and flames from an explosion could 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 more economical 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: Blocks the explosion using an isolation valve to prevent flame propagation.

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