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, 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 immediately closes the equipment or pipeline while releasing pressure to safeguard both machinery and personnel.

Flame-Free Explosion Venting Device: Isolation and Venting for Dust Removal PipelinesBrief Introduction:

1. It consists of two parts: an explosion venting 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 isolation valves not only prevents pressure waves and flames from propagating to upstream workshop production areas but also mitigates secondary explosion incidents, reducing property damage and ensuring personnel safety.

Product Parameters:

Static opening pressure: 0.01MPa;

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 operational 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, cyclones, 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 other industries.

Flame-Free Explosion Venting Device: Isolation and Venting for Dust Removal PipelinesWorking Principle:

The flame-free venting device consists of two parts—an explosion panel and a flame extinguishing module. The explosion panel responds to rapid increases in deflagration pressure, opening immediately to reduce pressure. As the expanding fireball passes through the open explosion 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 to prevent propagation, thereby avoiding secondary or multiple explosions. The flame extinguishing module eliminates deflagration flames, reduces the temperature of hot gases, and captures both burning and unburned dust passing through the open explosion 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 grinding, buildings, etc.

With increasingly stringent environmental inspections, safety is gaining more attention. In the past, explosion venting 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 because it endangers 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 panels for dust collectors is unreliable. We recommend using flame-free explosion 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: Uses an isolation valve to block the explosion and prevent flame propagation.

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