Patent ID: 6164962
Filing Date: 2000-12-26
Classification: F23G,F27D

Abstract:
A method of rapidly cooling a regenerative thermal oxidizer comprising the steps of:(1) providing a combustion chamber, and at least two heat exchangers communicating with said combustion chamber, each of said heat exchangers having an inlet valve and an outlet valve, said inlet valve communicating with a source of gas to be cleaned and said outlet valve communicating with a line leading to a downstream destination for said gas;(2) opening an inlet valve associated with a first heat exchanger, and opening an outlet valve associated with a second of said heat exchangers, said outlet valve on said first heat exchanger remaining shut, and the said inlet valve on said second heat exchanger remaining shut;(3) delivering gas to be cleaned through said open inlet valve, combusting said gas in said combustion chamber, and delivering a cleaned gas through said open outlet valve;(4) cyclically changing said heat exchanger with an open inlet valve to having an open outlet valve on a cycle time, and said heat exchanger with an open outlet valve to having an open inlet valve;(5) initiating shut down of said regenerative thermal oxidizer, and moving into a cool-down mode; and(6) then increasing said cycle time of said open inlet and outlet valves to rapidly cool said regenerative thermal oxidizer.