Dust Explosion Venting Safety Equipment (Flame-Free Venting Device)

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 to prevent 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.

Dust Explosion Venting Safety Equipment (Flameless Explosion Venting Device)Brief Introduction:

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

2. Suitable for flameless venting of dust explosions in indoor equipment. It offers high venting efficiency and is cost-effective;

3. Effectively blocks flames and heat, providing a safe environment for equipment, buildings, and personnel. It also collects dust effectively, reducing environmental pollution;

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

Dust Explosion Venting Safety Equipment (Flameless Explosion Venting Device)Working Principle:

The flameless venting device consists of two parts—an explosion venting panel and a flame extinguishing module. The explosion venting panel responds to the rapid increase in deflagration pressure, immediately opening to reduce pressure. When 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 and ensuring it does not propagate, thereby preventing 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 venting panel.

At the same time, pressure waves or noise generated by production equipment are also significantly reduced. As flames pass through the mesh flame arrestor element, heat exchange occurs between the element and the flames, rapidly cooling the high-temperature flames, releasing pressure and smoke. Additionally, pressure waves or noise generated by production equipment are reduced.

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, bag dust collectors, dust collectors, cartridge filters, pneumatic conveying systems, rod or ball mills, bucket elevators, dryers and ovens, roller grinding mills, and buildings.

With increasingly stringent environmental inspections, safety is receiving more attention. In the past, explosion venting panels were commonly installed on dust collectors to release 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 venting panels for dust collectors is not reliable. We recommend using flameless 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: Blocks explosions using an explosion isolation valve to prevent flame propagation.

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