Liquid heaters and vaporizers – Indirectly heated separate injected fluid
Patent
1990-11-30
1992-03-24
Dority, Carroll B.
Liquid heaters and vaporizers
Indirectly heated separate injected fluid
126360A, 126101, F22B 102
Patent
active
050978020
ABSTRACT:
A high efficiency furnace having a substantially continuous wet heat exchanger wherein such continuous wet operation is provided by raising the dew point of the combustion products by submerged combustion before introduction into said head exchanger. That is, a water holding reservoir is provided between the burner and the heat exchanger, and condensate flows from the heat exchanger back into the reservoir. The combustion products are drawn through the water in the reservoir by providing a partition having a submerged lower portion, and providing a pressure differential between the chambers on the two sides of the partition. The submerged passageway from one chamber to the other may preferably be a serrated bottom edge on the partition or a plurality of apertures in the partition. The pressure differential may be provided by using a combustion blower or alternatively, using an induced draft blower preferably disposed at the flue end of the heat exchanger. Also provided is a controller that continues to activate the blower for a predetermined time period after the fuel is shut off to the burner so that the heat exchanger is flushed with pure water condensate at the end of a burning cycle.
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Clark William R.
Dority Carroll B.
Raytheon Company
Sharkansky Richard M.
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