The FLAMEX Spark Detection and Extinguishing System provides a common sense, cost effective measure for the prevention of dust collector fires and explosions.
Dust Collectors are the primary piece of equipment associated with dust explosions. It is estimated that 70-80% of all industrial explosions where combustible dusts are handled are generated within a dust collector.
There are 5 elements required for an explosion to occur:
1. Fuel (Dust)
2. Oxygen (Air)
3. Dispersion (Dust laden air)
4. Confinement (Dust Collector)
5. Ignition (typically a spark).
It is possible that the first 4 of these elements may all be present at times within a typical dust collector operating under normal conditions. Under these conditions, should the concentration (MEC) and characteristics (particle size, dryness) of the dust constitute that it is deflagrable, all that is necessary for an explosion to occur is the introduction of a spark or glowing ember into this potentially dangerous environment.
The FLAMEX system can sense a spark or burning material in the ductwork upstream of the collection equipment and suppress it with a minimal amount of water in milliseconds before it can travel further downstream and become an ignition source for a fire or explosion. This simple and straightforward prevention approach minimizes or eliminates production interruption and can be implemented at a reasonable cost. The flexibility of the system allows its use with various components and in various system protection designs
The basic system is typically comprised of 3 main components: a Control Panel, a number of Spark Detectors, and an Extinguishing Assembly.
Control panels are sized based upon the requirements of the application. A number of models with various features are available. Panels can range from the most basic single zone console to sophisticated multi-zone panels with technologically advanced features. All are compatible with FLAMEX Detectors and Extinguishing Assemblies.
FLAMEX Inc. can assist you with the selection of the appropriate control panel to meet the requirements of your specific application.
Detecting a spark in a pneumatic material transport duct at speeds that often exceeds 5,000 feet per minute requires a very sensitive and very fast sensing device. The FUX 3001-E Spark Detector provides the sensitivity, speed, durability and reliability that such an application demands. Two or more spark detectors will be required to monitor a duct cross-section depending upon the size and configuration of the duct. These detectors are ideally mounted on a main section of ductwork downstream of any material input branch ducts and sufficiently upstream of the proper location for the extinguishing assembly to be installed. Upon detection, the detectors cause the system to activate thereby triggering the extinguishing device and causing the panel to go into an alarm state. The detectors automatically and immediately reset themselves so that they stand ready to detect any possible subsequent sparks. Learn More
The Extinguishing Assembly is a pre-assembled device that mounts to the duct downstream of the detector location and upstream of the inlet to a dust collector. It is made up of a number of components outlined below.
The fast-acting solenoid valve reacts without delay upon activation. The specially designed stainless steel nozzle creates a 180 Degree water spray pattern effectively covering the duct cross section. This spray curtain is actualized inside the duct in less than 300 milliseconds and quenches the detected sparks as they pass through. The spray cycle time is pre-set and shuts off after the last spark has been extinguished to minimize the amount of water used during an activation.
Each system is custom designed to meet the protection requirements of each individual specific application. Many system designs and components are possible.
Please contact FLAMEX Inc. concerning your specific application.