Furnace and ductwork implosion interruption air jet system

摘要

Apparatus and methods are disclosed for rapidly counteracting a transient low-pressure condition, that can occur intermittently in the exhaust section of a power plant or other such industrial facility upstream of exhaust fans as a result of an event that interrupts the generation and/or flow of exhaust gases, using jet nozzles disposed in the exhaust section and connected to a source of pressurized air or other suitable momentum material. By orienting the jet nozzles in a direction generally opposite to the flow of exhaust gas and actuating the system to release a burst of compressed air, for example in the event of a power plant interruption, the low-pressure condition can be ameliorated preventing damage to the exhaust section.

主权项

1. An implosion interruption system for rapidly counteracting transient low-pressure implosion conditions in an exhaust gas section of an exhaust gas-producing plant through which there is a forward flow of plant exhaust gases during normal plant operation that continues for at least a short period of time even after a plant operation interruption which creates a possible implosion condition, said implosion interruption system comprising in combination: a source of a momentum material; one or more jet nozzles disposed in the exhaust gas section, such jet nozzles oriented to produce a stream of momentum material in a direction generally opposite to the forward flow direction of the exhaust gases through that exhaust gas section; one or more conduits connecting the source of momentum material to the jet nozzles, said conduits having a material flow control element; a propelling mechanism that imparts sufficient velocity to a sufficient mass of the momentum material passing through the jet nozzles to produce a substantially immediate reverse pumping effect that tends to arrest the forward flow of exhaust gases and increase pressure upstream of the jet nozzles to effectively counteract an implosion condition; and, a controller that activates the implosion interruption system at an impending implosion condition.