Liquid heaters and vaporizers – Subsidiary
Patent
1985-02-21
1986-04-22
Favors, Edward G.
Liquid heaters and vaporizers
Subsidiary
126365, F22B 3300
Patent
active
045834946
ABSTRACT:
A heat recovery apparatus for boilers, or the like, comprising a heat recovery housing having a gas inlet and a gas outlet disposed within the bottom and the top, respectively. A plurality of interconnected water conduit tubes is provided. A plurality of by-pass dampers pivotally connect between the pair of end walls within the heat recovery housing such that when the by-pass dampers are in a closed position, the closed by-pass dampers define a generally flat by-pass structure angularly disposed with respect to the horizontal plane. A plurality of exit dampers is pivotally connected between the pair of end walls such that when the exit dampers are in a closed position, the closed exit dampers define a generally horizontal flat exit structure extending between the pair of end walls. The process for recovering heat from hot combustion gases flowing through the combustion gas inlet comprises closing pivotally the by-pass dampers which essentially simultaneously divert or change the direction of flow of the hot combustion gases towards the water conduit tubes in order to effect a heat transfer between the hot gases and the water passing circuitously through the conduit tubes and extract condensate from the hot gases which accumulates in the bottom of the heat recovery housing. The process additionally includes opening pivotally the exit dampers to allow the passage of gases from the water conduit tubes to the combustion gas outlet, and draining accumulated condensate from the bottom of the heat recovery housing through a condensate drain.
REFERENCES:
patent: 681245 (1901-08-01), Muir
patent: 1885267 (1932-11-01), Kalfus
patent: 4227647 (1980-10-01), Eriksson
Favors Edward G.
Widdowson John H.
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