Boiler

Details Boiler Boiler

F - Mech Eng,Light,Heat,Weapons

24

H

122/92

F24H 1/24 (2006.01) F24H 1/28 (2006.01) F24H 9/00 (2006.01)

Patent

CA 2033988

Abstract The boiler has a heat-exchanger space (13) accommodated inside a water jacket (15). Concentric to this is another water jacket (27) that extends at the rear of the boiler along approximately half the length of the first water jacket. Inside the second water jacket is a concentric core (43). There is a helical channel (54) with an outlet (33) for flue gas extending out of one intermediate space (53) and another helical channel (56) with another outlet (37) for flue gas extending out of another intermediate space (55). In the vicinity of the mouths of the outlets (33 & 37) is a damper (39). In the illustrated mid-position the flue gases can flow practically unimpeded out of both channels. This corresponds to operation of the burner (11) at full load. When the load is maximally reduced, the outlet (33) is closed off by the damper. The temperature of the exhaust gas is the same in each case, however. Thus, failure to attain the condensation point will be prevented in all parts of the boiler. - 21 -

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