F - Mech Eng,Light,Heat,Weapons – 22 – D
Patent
F - Mech Eng,Light,Heat,Weapons
22
D
122/132
F22D 1/00 (2006.01) F22B 33/00 (2006.01)
Patent
CA 1156886
ABSTRACT OF THE DISCLOSURE This invention relates to a system for reclaiming or recovering heat which would otherwise be lost from a heating plant. The invention accordingly relates to a heating plant incorporating a plurality of boilers, including a stand-by boiler, there being means for supplying fuel and air to at least one of said boilers, except for the stand-by boiler, and flue gas exhaust ducts associated with each of such boilers. The improve- ment according to the invention is a waste heat recovery system wherein the flue gas exhaust duct from said at least one boiler is operatively connected to the stand-by boiler for the circulation of hot flue gases therethrough in contact with its heat exchange surfaces thereby to effect the heating of water passing through the stand-by boiler thereby to recover a portion of the heat energy in the flue gases. The system further includes a means for controlling the temperature of the water in the stand-by boiler at temperatures above those necessary to avoid excessive cooling of the flue gases within the stand-by boiler and consequent undesired condensation of certain flue gas components on its heat exchange surfaces.
340337
Beckett Ardell
Gowling Lafleur Henderson Llp
LandOfFree
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