Flame-free explosion venting device for dust explosion vents without flame emission.

A flameless explosion venting device is a safety apparatus used 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 the escalation of an explosion. Its working principle involves detecting changes in gas pressure and temperature inside pipelines or equipment to determine whether there is a risk of explosion or fire. If a hazard is confirmed, it immediately shuts down the equipment or pipeline while releasing pressure to achieve the goal of protecting both equipment and personnel.

Flameless Explosion Venting Device Dust Explosion Vent Opening Flameless Venting DeviceBrief Introduction:

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

2. Suitable for flameless venting of dust explosions in indoor equipment. It offers high venting efficiency and is economical and practical;

3. It effectively blocks flames and heat, providing a safe environment for equipment, buildings, and personnel, while also effectively collecting dust to reduce environmental pollution;

4. When used in combination with an isolation valve, it not only effectively prevents pressure waves and flames from propagating to upstream workshop production areas but also suppresses secondary explosion accidents, 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: Depending on the operating conditions, it can be divided into rectangular flameless explosion venting devices and curved flameless explosion venting devices;

Applicable equipment: Dust collectors, bucket elevators, drying equipment, cyclones, 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.

Flameless Explosion Venting Device Dust Explosion Vent Opening Flameless Venting DeviceWorking Principle:

The flameless venting device consists of two parts—an explosion vent panel and a flame quenching module. The explosion vent panel responds to the rapid increase in deflagration pressure, immediately opening to reduce pressure. When the expanding fireball passes through the open explosion vent panel, it is intercepted by the flame quenching module. The precision stainless steel mesh supported by a frame acts as a three-dimensional flame trap, extinguishing the flame and ensuring it does not propagate, thereby preventing secondary or multiple explosions. The flame quenching module eliminates deflagration flames, reduces the temperature of hot gases, and captures both burning and unburned dust passing through the open explosion vent panel.

At the same time, pressure waves or noise generated by production equipment are also reduced to a minimal level. 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 the intensity of pressure waves or noise generated by the 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 mills, buildings, and more.

With increasingly stringent environmental inspections, safety is receiving more attention than ever. 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 may cause secondary or multiple explosions, creating risks. Therefore, relying solely on explosion vent panels for dust collectors is not reliable. We recommend using flameless explosion venting + isolation technology (a more economical solution) or explosion 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: A detection device detects sparks and triggers a fire suppression system to instantly extinguish the flame, preventing an explosion.