Explosion Suppression
Explosion suppression systems offered by Tessa protects process equipment against explosion effects. The system is designed to detect an explosion in its earliest stages and provide an immediate response so as to extinguish the explosion source before it becomes catastrophic to the plant and personnel.
The basic type of explosion suppression system consists of a dynamic pressure increase sensor, pressure containers with extinguishing agent and an electronic system control unit. The pressure sensor continuously monitors pressure fluctuations inside the explosion-protected equipment. System activation depends on the rate of pressure rise (ΔP/Δt) inside the process vessel, according to the product's explosion characteristic – the Kst constant (value characteristic for a given flammable and explosive product). In the event where the measured ΔP/Δt value corresponds precisely to the product's Kst index, the electronic control system interprets the signal from the pressure sensor as an occurrence of "initial explosion stage" which will trigger an immediate opening of the cylinder with extinguishing powder and its injection into the protected equipment. The total response time, from the moment of detecting the "initial explosion stage" until it is extinguished, is of the order of milliseconds (less than 1 second).
The benefits of an explosion suppression system include:
- protection of process equipment and piping in enclosed spaces,
- flames, toxic or valuable materials are retained within the process equipment (environment protection),
- there is no risk of the equipment burning out after an explosion (no fire after explosion),
- the effects of an explosion are reduced to a minimum,
- the system is guaranteed to activate only in the event of an explosion,
- insensitivity to changing processing conditions inside process equipment (pressure fluctuations),
- the solution is suitable for pharmaceutical and food applications.
Suppressant Containers – HRD-E Type
Manufacturer: Kidde Brand - und Explosionsschutz GmbH
Applications:
- for the protection of silos, filters, cyclones, mixers, dryers, granulators, etc., where flammable materials are present in explosive concentrations
- HRD cylinders are intended for the protection of any tanks, ducts and pipelines in which ST1 class dusts are present
- ST3 class gases and hybrid mixtures across every industry
MEX-3.2 Explosion Multisensor
Manufacturer: Kidde Brand- und Explosionsschutz GmbH
Applications:
- an element of the protection system for vessels and process equipment where flammable and combustible substances are handled in explosive concentrations
- identification of explosion pressure rise, in its early stages, triggers the activation of the explosion protection system
- designed for assembly on process vessels, ducts and pipelines in which ST1-ST3 class dusts are present as well as for gases and hybrid mixtures across all industries
DG-IR-3C Infrared Optical Sensor
Manufacturer: Kidde Brand- und Explosionsschutz GmbH
Applications:
- a protection system element for ducts, pipelines and tanks where flammable materials are present in explosive concentrations
- identification of ignition sources such as flame, heat and sparks in order to activate the protection system on process lines and ducts connected to protected equipment
- quick detection of an explosion propagating through ducts and piping in order to activate the protection system
- to be used in enclosed spaced without daylight access
Infrared optical sensor IR-13 type
Manufacturer: Kidde Brandund Explosionsschutz GmbH
Application:
- element of protection system for canals, pipes and containers as well as when flammable substances are present, with explosive concentration
- identification of ignition sources such as flame, heat and flame focus, in order to activate protection system, on process lines, canals and pipelines
- quick detection of explosion propagating through the canals in order to activate protection system
- to be used in enclosed spaced without daylight access
EX 100.1 Single-Zone Control Unit
Manufacturer: Kidde Brand- und Explosionsschutz GmbH
Applications:
- a protection system element for explosion-protected equipment (ducts, process equipment and vessels) where flammable materials are present in explosive concentrations
- this single-zone control unit performs the following control and diagnostic functions: system monitoring, distributes stored energy for actuation of explosion-protection equipment and displays the status of an explosion suppression system.
EX 5000 Multi-Zone Control Unit
Manufacturer: Kidde Brand- und Explosionsschutz GmbH
Applications:
- a protection system element for explosion-protected equipment (ducts, process equipment and vessels) where flammable materials are present in explosive concentrations
- this modular multi-zone control unit performs the following control and diagnostic functions: system monitoring, distributes stored energy for actuation of explosion-protection equipment and displays the status of an explosion suppression system.
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