What is explosion isolation?
The objective of explosion isolation or decoupling is to protect adjacent parts of the plant and prevent the explosion from propagating.
Why is isolation so important?
In practice, many vessels, silos and devices are connected by pipes, pneumatic conveyors and dust extraction or aspiration lines. If a dust explosion occurs, the flames and pressure waves can spread through these conduits to other parts of the plant. Pre-compression and flame jet ignition exacerbate the explosion in connected vessels. The results is a series of secondary explosions that cause even more catastrophic damage.
An isolation system prevents explosions from propagating and thus minimizes the consequences of an explosion. It ensures optimum protection for adjacent parts of the plant.
Different types of isolation
Isolation systems can be either active or passive.
Passive isolation systems react simply to the effect of the explosion. Their structural design prevents flames and pressure waves from spreading.
Active systems have detectors or sensors which register the pressure rise or flames and trigger countermeasures.
Explosion isolation systems use components such as quench valves and non-return flaps or valves. Chemical extinguishing barriers are also commonly used to smother the explosion flames. Valves and extinguishing barriers are capable of isolating components in both directions simultaneously.
Explosion, Flame and Spark Isolation
Numerous processes can cause explosive dust/air mixtures within industrial systems (dust collectors, mixing machines, fluid bed granulators, mills, and the like). If ignition sources cannot be eliminated due to process conditions, these systems are often equipped with explosion protection measures like venting or suppression. This way, connected ductwork is decoupled or isolated from protected enclosures and flames and explosion pressure will not be conveyed into other areas.
Q-Flap Non-Return Valve
Cost-effective isolation of air intake pipes at filters and separators
Q-Flap non-return explosion valves can be used to isolate explosions effectively in virtually all areas of industry. The Q-Flap is suitable for aspiration lines of filtering separators and suction lines at mills.
Q-Flap® Compact and Q-Flap® Compact Plus Non-Return Explosion Valve
• passive system
• no complicated sensors
• easy to use
• easy maintenance via inspection door
Exkop® Quench Valve With Electronic Controller
Space saving bi-directional isolation
This system isolates plant components in both directions and comprises a self-monitoring EXKOP® controller with data storage and one or several quench valves.
Explosion, Spark and Flame Isolation
The EXKOP® system provides a safe, economic and easy way to isolate and protect production equipment in case of an explosion, spark and/or flame front up or down stream. The system is made up of two REMBE products, the EXKOP® Quench Valve and EXKOP® Mini controller.
Advantages of EXKOP Quench Valve System
• Effective protection through high-speed detection of explosion events.
• Returns to operation again immediately after triggering.
• Self-monitoring safety electronics with operating data storage.
• Modem-compatible remote system analysis permits remote maintenance.
• System status or error messages reported immediately via the operating and display panel.
• Processes wide range of trigger signals for easy retrofitting to existing plants.
• Fail Safe mechanism automatically closes the valve if the power / compressed air fails or the valve is manipulated.