Stoves and furnaces – Liquid heater – Fluid fuel burner for other than top-accessible vessel
Patent
1979-10-29
1981-06-30
Scott, Samuel
Stoves and furnaces
Liquid heater
Fluid fuel burner for other than top-accessible vessel
126359, F24H 110
Patent
active
042757088
ABSTRACT:
A direct contact, water heating column furnace for producing non-corrosive, drinking-water-quality heated water comprising a body or shell having at least an upper, heat exchange and stripping compartment and integrally formed and in-line therewith a lower compartment. A grating separates the integrated two compartments and a plurality of heat absorbing and transfer bodies, such as for example, Paul rings, are positioned within the upper compartment on top of the grating. A greater amount and depth of heat absorbing bodies are provided than would be needed merely for heating in order to also strip the water of substantially all its free oxygen to eliminate the corrosive effects of CO.sub.2 presence. Cold water is introduced into the furnace by a spray positioned over the heat absorbing bodies with the water running into the lower compartment as it is heated and oxygen-stripped by heating means. The heating means operates at a relatively low temperature free of intense hot spots to avoid NO.sub.x formations and its corrosive effects, with the heating means positioned within the lower compartment being an open, exposed flame with direct flame/water contact. The furnace has water flow directing means positioned within the furnace shell to direct the downward flow of water to a predetermined area in the lower compartment in order to prevent hot spots from forming on the shell of the furnace in the area of the lower compartment. An exhaust stack is provided above the upper compartment for removing the exhaust gas from the furnace with the exhaust stack being formed, in one embodiment, in a generally U-shape configuration. The U-shape configuration acts to prevent back flow of air into the furnace whenever the furnace blowers are shut-off.
REFERENCES:
patent: 884223 (1908-04-01), Shipley
patent: 1762762 (1930-06-01), Coffey
patent: 1822274 (1931-09-01), Dibble
patent: 2651299 (1951-09-01), Brown, Jr.
patent: 2759328 (1956-08-01), Cockrell
patent: 3190283 (1965-06-01), Miyahara
patent: 3648682 (1972-03-01), Bougard
patent: 3826240 (1974-07-01), Miyahara
Green Randall L.
Scott Samuel
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