Flame-free explosion relief panel, smoke-free pressure relief device

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 escalation of explosions. 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 Panel and Smoke-Free Pressure Relief DeviceBrief Introduction:

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

2. Suitable for indoor equipment handling dust explosions with 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. When combined with an isolation valve, it 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: 304 SS;

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

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

Flame-Free Explosion Venting Panel and Smoke-Free Pressure Relief DeviceWorking Principle:

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

Simultaneously, pressure waves or noise generated by production equipment are significantly reduced. When flames pass through the mesh flame arrestor, heat exchange occurs between the arrestor and the flames, rapidly cooling the high-temperature flames, releasing 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 become a major concern. 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 due to risks to surrounding personnel and equipment. The pressure waves and flames from explosions could trigger secondary or multiple explosions, posing hazards. Therefore, relying solely on explosion venting 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 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.