Water heating apparatus with passive flue gas recirculation

Details Water heating apparatus with passive flue gas recirculation Water heating apparatus with passive flue gas recirculation

1995-09-05

1997-09-16

Price, Carl D.

Stoves and furnaces

Liquid heater

Open-top vessel that may include lid

126360R, 431 9, 431115, F23C 906

Patent

active

056669445

ABSTRACT:
The invention relates to a water heating apparatus and method to passively recirculate flue gas in order to reduce NO.sub.x emissions formed during combustion. The apparatus uses a high efficiency burner, a submergible, pressurized, combustion chamber having multiple external heating surfaces, and a flue collector that collects and passively recirculates a portion of the flue gases back into the burner air intake while exhausting the rest. The multiple external heating surfaces are installed within a closed tank and are submerged in water under pressure during use.

REFERENCES:
patent: 2502664 (1950-04-01), Nest
patent: 3097686 (1963-07-01), Morrow
patent: 4465024 (1984-08-01), Adams
patent: 4545329 (1985-10-01), Adams
patent: 4926765 (1990-05-01), Dreizler et al.
patent: 5129818 (1992-07-01), Balsiger

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