In heat transfer oil systems, heat transfer oil is used above its flashpoint. If oil escapes unintendedly – for instance through a leakage in the tube spiral of the heater – oil can ignite on a hot surface. If ignite once, a big fire can develop, depending on how much oxygen and heat transfer oil is in the vicinity.
There are two effective types for distinguishing a fire: Either with inert gas, e.g. argon, or with water mist. In the two variants, oxygen is withdrawn from the fire to extinguish it.
The extinguishing method with inert gas flushes the heater chamber with the gas. The inert gas displaces oxygen and the fire goes out. It must be ensured that enough inert gas is available to fill the whole heater.
The extinguishing method with water mist, beside the displacement of oxygen, the hot surfaces are cooled additionally. This has the advantage of inhibiting a new ignition the oil after the extinguishing process.
Mostly, NESS heaters already include the possibility for integration or retrofitting for the two extinguishing systems and the respective connecting points are provided. If you are not sure, certainly we would be happy to check the integration possibility for you.
The NESS Argon Extinguishing System (NEA) flushes the heater with inert gas (argon) which is clearly lighter than air and so it displaces and extinguishes the fire. The extinguishing system is part of the NESSessities concept which constantly increases safety, availability, durability and efficiency in thermal oil systems.
No problem at all! Like all NESSessities, also the NESS Argon Extinguishing System is designed with practical orientation. Often, the NESS heaters already have integration points, where the integration is easy to make. In some circumstances, the subsequent integration in heaters of other manufacturers can be realized. Certainly, be would be happy to check the respective integration possibility for you.
Probably, the most important thing is the quantity of required argon adapted to the respective heater size that must be made available. For this purpose, beside the heater volume it is also required to calculate the volume of the air- and flue-gas leading parts of the system / channels and to use these as basis for the dimensioning of the system.
Furthermore, in addition to the manual switching on of the argon Extinguishing System, also the integration in the existing safety switch circuits of the heater is needed.
As the name already says, apart from the actual extinguishing of the fire, the source of fire will be cooled additionally by the fine water mist. The extinguishing and cooling system with water mist (NEWN) is part of the NESSessities concept which constantly increases safety, availability, durability and efficiency in thermal oil systems.
A direct water jet to extinguish the fire would be dangerous. It could evaporate instantaneously if it contacts the heat of the thermal oil leakage and cause damage.
Therefore, the NESS extinguishing system counts on a very fine water mist that forms an inert pad on the fire and smothers it. The water mist is sprayed by a special nozzle that is moved into the heater chamber if activated.
No problem at all! Like all NESSessities, also the NESS Extinguishing and Cooling System is designed with practical orientation. It consists of two parts, i.e. the lance unit which moves into the heater and extinguishes the fire and the control unit. The NESS Extinguishing and Cooling System has its own control unit for process control and process monitoring.
Often, the NESS heaters already have integration points, where the integration is easy to make. In some circumstances, the subsequent integration in heaters of other manufacturers can be realized. Certainly, be would be happy to check the respective integration possibility for you.
