Liquid heaters and vaporizers – Indirectly heated separate injected fluid – Submerged flame
Patent
1981-04-16
1983-07-19
Favors, Edward G.
Liquid heaters and vaporizers
Indirectly heated separate injected fluid
Submerged flame
110215, F22B 102
Patent
active
043938159
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a heating plant for fuel oil, fuel gas, or other combustible liquids or gaseous materials.
Because of the world-wide energy crisis, great effort has been made during the past years to develop full utilization of the heat from the combustible materials, in the field of heating plants--especially oil heating plants. Thus, a highly effective burner with a blue flame, that is a burner which on no account develops soot (vide the brochure "Verbrennung total" RE from M.A.N. Brennerbau, Rossweg 6,2000 Hamburg) has been developed. Even with such a burner, the heating economy is not ideal, as part of the heat from the flue gas is wasted in the chimney air. In connection with such a burner it has been attempted to regenerate the heat which is wasted in the chimney air, but so far without great success. In this connection we refer to an article in "Ingenioren" no. 49, Dec. 8th, 1978, "Oliefyret minikedel uden forurening og med 100% nyttevirkning", ("Oil heated mini boiler, without pollution and with 100 percent efficiency").
The object of the invention is to provide a heating plant which shows a better heating economy than heating plants of this kind belonging to the prior art.
A construction in accordance with the present invention includes a heating plant comrising a housing, a combustion chamber, a high pressure burner associated with the combustion chamber, an exhaust pipe extending from the combustion chamber vertically within the housing and terminating within a smoke trap, the smoke trap being mounted within the housing and including a dome having a downwardly extending skirt, the skirt extending below the top level of the exhaust pipe, means for maintaining a washing liquid level below the level of the exhaust pipe and above the bottom edge of the dome skirt; openings provided in the dome skirt in the area below the liquid level, said openings decreasing in area from the bottom edge of the skirt to the top limit of said openings below the level of the liquid, an exhaust stack communicating with the housing above the dome, and heat exchange means associated with the housing through which heat exchange fluid may be circulated for removing the heat generated in the heating plant for practical use.
In the heating plant according to the present invention, heat exchangers are suitably provided near the combustion chamber so as to retrieve heat therefrom. The flue gases from the combustion chamber rise through the exhaust pipe into the dome, and the flue gases are thus forced to bubble through the liquid in the housing, such as water, and then through the openings provided in the skirt of the dome. As the pressure of the flue gases increases in the dome, the bubbling will increase as the flue gases are forced lower and lower along the larger area of openings in the skirt of the dome. The burner utilized with the combustion chamber must be of a high efficiency so that soot is not collected in the dome, thereby blocking the openings.
Heat exchangers can be provided in the top horizontal surface of the dome in order to keep the dome surface cool and, of course, to exploit an important heat source. If the dome is made of a metal material, it is essential to have a heat exchanger in the form of a water jacket at the dome top surface so as to prevent the metal from becoming damaged due to the intense heat. If the dome is constructed out of ceramic material, it is believed that such a heat exchanger may not be necessary.
Heat exchangers can also be located in the washing liquid, that is, the water through which the smoke or flue gases are to be bubbled. It has been found that the dome device, according to the present construction, is an effective way of absorbing the condensation heat from the available water vapor in the flue gases. The washing liquid also absorbs the heat from the flue gases.
In a further embodiment of the present invention, there is provided a heat pump associated with the smoke stack from the housing for extracting heat from the flue gases passing up through the smoke stac
REFERENCES:
patent: 751972 (1904-02-01), Berg
patent: 4018216 (1977-04-01), Thurley
patent: 4301773 (1981-11-01), Johnson
Nielsen Eyvind S.
Pedersen Niels R.
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