Flame-free venting device for cyclone separators

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 monitoring changes in gas pressure and temperature inside pipelines or equipment to detect potential explosion or fire hazards. If a threat is confirmed, the device immediately closes the equipment or pipeline while releasing pressure to safeguard both machinery and human safety.

Flame-Free Venting Device for Cyclone SeparatorsBrief Introduction:

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

2. Suitable for indoor equipment handling dust explosions with flame-free venting. It offers high venting efficiency and is cost-effective;

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 workshop 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, 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 more.

Flame-Free Venting Device for Cyclone SeparatorsWorking Principle:

The flame-free venting device consists of two parts—an explosion vent panel and a flame quenching module. The explosion vent panel responds rapidly to rising deflagration pressure, opening immediately to relieve pressure. As 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 significantly reduced. When flames pass through the mesh flame arrestor, heat exchange occurs between the arrestor and the flame, rapidly cooling the high-temperature flame while venting pressure and smoke. Additionally, pressure waves or noise from the equipment are minimized.

Application Fields:

Widely used in industries such as grain processing, metallurgy, chemicals, power, light industry, tobacco, pharmaceuticals, machining, and solid waste treatment. Applicable equipment includes cyclone separators, baghouse dust collectors, dust collectors, cartridge filters, pneumatic conveying systems, rod or ball mills, bucket elevators, drying ovens, roller grinders, and buildings.

With increasingly stringent environmental and safety regulations, safety has become a major concern. Traditionally, explosion vent panels were installed on dust collectors to release overpressure caused by dust explosions. However, such installations indoors are not permitted by safety regulations due to risks to nearby personnel and equipment, as pressure waves and flames from explosions could trigger secondary or multiple explosions. Therefore, relying solely on explosion vent panels for dust collectors is insufficient. We recommend using flame-free venting combined with isolation technology (a cost-effective solution) or explosion suppression with isolation technology to ensure production safety.

There are three primary 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.