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GreCon - Model BS 7 -Spark Detection & Extinguishment Systems
GreCon introduces interesting innovations in the detection, extinguishment and operation of their BS 7 spark extinguishing system in the area of preventive fire protection. The new products include the Hot Particle Detector HPD 1/8 for the detection of hot particles as well as Thermo Sensor TM 1/9 for the detection of smouldering fire and quickly rising temperatures. Additionally, the Ultrahigh-Speed Extinguishment BS 7 UHS for short distances and BS 7 NET for easy operation of the spark extinguishing system from the control room. The revolutionary TOUCH & SLIDE Panel makes the handling of the control console very easy. Current alarm zones and other important details can be zoomed in without detours via complicated and time-consuming menus.
- Events recorded exactly to the millisecond
- Risk management of your production process
- Remote Control Monitor and Safety Information System option available
- Extinguish before you get burned
- Eliminates ignition sources
- Fire and explosion prevention
- Avoid property, equipment and personal damage
- Maintain greatest production availability
- Discount for fire protection risk insurance possible
In times of worldwide competition, modern production plants become more and more efficient. Besides new factories, a continuous improvement and increase in productivity are therefore demanded from already existing and often obsolete production lines. Nevertheless, production safety must not suffer from this. Above all, it is necessary to nip the creation of fires and explosions in the bud. Unprotected facilities for comminution, drying, cooling and pressing are especially at risk with their pneumatic or mechanical conveying or extraction systems. Industry-specific protection solutions.
Spark detection and extinguishment systems detect and automatically extinguish sparks. The risk of dust fires and explosions can thus be reduced.
Dust fires and explosions often occur in filters, silos and dryers. They endanger human lives, cause severe property damage and interrupt production operations. The reason can be sparks or burning embers caused when working with or drying combustible material and reaching plant areas at risk through the pneumatic and mechanical conveying systems.
Within the framework of its special technology and its distinct design, the GreCon system was developed to detect and extinguish these ignition sources in pneumatic exhaust systems before they reach filters and silos and cause a fire or explosion in these areas!
Spark sensors are flush-mounted on the walls of the exhaust ducts to detect the infrared radiation emitted by sparks in the transport air stream.
Immediately upon spark detection, a water mist spray is released into the duct and the sparks are extinguished. The extinguishing device consists of a special high-speed solenoid valve with one or more spray nozzles. These are flush-mounted to the duct wall about 4 to 6 meters (12 to 18 feet) downstream of the sensors, depending on the conveying velocity.
Extinguishment is accomplished with water at high flow pressure. Special extinguishing nozzles spray a water mist, which covers the entire cross section of the duct. With a properly planned installation, the ignition sources enter the water mist and are effectively extinguished. The valve closes after a preset and adjustable time frame, normally 5 seconds.
The GreCon system effectively detects and extinguishes ignition sources without machinery shut-down or interruption of the production process. The amount of water released is sufficient to extinguish the sparks, but generally does not adversely affect the filter media.
Sparks and burning embers can occur any time combustible materials are dried. Sources of spark danger can be uncontrolled machinery shut-down, overdried material within the dryer or overheated material build-up in the ducting. Overheated glowing particles leave the dryer, come in contact with oxygen in the air, and may cause a fire or explosion. All plant areas connected by the pneumatic conveyor system and even the dryer itself can be affected. Because temperatures in this area exceed the operating temperature of standard sensors, sensors with fibre optic cables are utilised.
GreCon sensors can detect sparks in pneumatic transport ducts of dryers or in discharge chutes and mechanical conveyors.
Upon detection of sparks, pre-programmed countermeasures are automatically triggered; i.e., release of extinguishing spray, closing or aborting pneumatic pipes, or, in extremely critical cases, shut-down of and deluging the dryer or filters.
With high speed milling equipment, heavy showers of sparks may be generated, when metal or stones enter the mill, or, when mechanical parts are damaged. GreCon sensors detect these showers of sparks and activate the extinguishing devices.
The GreCon system counts each spark as it is detected. The system can be pre-programmed to extinguish individual sparks without interrupting production and additionally shut down machinery upon counting a preset number or shower of sparks. This feature protects machinery from further damage due to mechanical failure or foreign material in the mill.
