Spark detection goes further than just the detection of sparks but also includes the detection of particles hot enough to cause an ignition. Both sparks and excessively hot particles have the potential cause of ignitions which can lead to fires and/or explosions. An explosion is a very fast combustion reaction, therefore in order to produce an explosion there must exist a combustible substance, a source of ignition and oxygen. At Aairex, we are capable of providing solutions to threats posed by ignitions.
Detection is achieved through components that are activated by pressure or light, the most appropriate configuration is determined by the process conditions.as a result of the detection a signal is sent to the electronic control system indicating that a combustion process has been detected. This given system processes the received signal and beings the receptacle opening sequence that contains the extinguishing agent. through the discharge of the extinguishing agent.
The suppression of the explosion is possible thanks to our system’s short reaction time; in only milliseconds it detects and extinguishes the incipient explosion.
A suppression nozzle is activated on a signal from a detector or detectors downstream of an potential ignition source. Upon detection of an ignition source, a water spray is injected into the air stream to extinguish the igniter.
Pressurised Pump Stations
On receiving a signal from the spark detection system, the pressurised pump station delivers a high pressure supply of water to the suppression nozzles.
These automatically close to contain and reduce the spread of an explosion or fire.
Monitoring and Alarm Control Panels
Monitoring is consistent and records events during operation. Outputs are available to duty managed personnel monitoring stations.
Explosion Venting Panels
It is a method of protection against explosions based on the opening of weak laminates that are installed on top or side of the receptacle or equipment, in such a way that the pressure waves and flames dissipate in a safe area.
In an explosion that may take place within closed receptacle or closed equipment, the pressure can reach a value (Pmax) around 10 bar. This pressure usually is superior to the pressure that the majority of the installations can endure. A relief vent opens to a relatively low pressure; therefore, the maximum pressure in the receptacle will be reduced to an inferior value, called reduced pressure of explosion.
Flameless Explosion Venting
Given that in many occasions it is not possible to direct the explosion vent to a secure area, the supply elements that suppress the output of the flame are made necessary in case the vent panel was to break, a great option being flameless venting equipment.
This device substitutes the vent duct. When an explosion occurs in a receptacle with a flameless vent, the explosion panel that is incorporated in the flame arresters breaks and the explosion expands throughout the entire surface, which is made up of a special mesh that is designed to retain incandescent particles and flames, additionally it works to achieve efficient cool-down of the combustion gasses and noteworthy reduction of the effects of pressure waves.
The maximum pressure of explosion in a receptacle with flameless venting will be somewhat higher, due to the resistance when the combustible gasses pass through the mesh. This somewhat excess pressure can be offset with a small increase in the venting area.
Explosion Non-Return Valves
Fitted in the ducting upstream of the filter plant, explosion non return valves are designed to prevent an explosion from returning to the factory.