Gas: heating and illuminating – Generators – Cupola
Patent
1979-07-19
1981-06-09
Bashore, S. Leon
Gas: heating and illuminating
Generators
Cupola
48 67, 48 77, 122 5, 422201, C10J 320
Patent
active
042722551
ABSTRACT:
The apparatus of U.S. Pat. No. 3,988,123 is improved by constructing the heat recovery stage as a relatively elongated water-wall type of heat exchanger within a pressure shell, rather than of shell and tube type. The heat exchanger is advantageously formed from contiguous, externally finned, vertical tubes that are rigidly joined together to form a laterally closed, heat recovery chamber, the fin portion of one being welded along its tip to the tube portion of another adjoining such fin portion. The heat exchanger tubes preferably continue vertically throughout substantially the entire height of the gasification reaction i.e. combustion chamber of the first stage of the apparatus, completely eliminating the intermediate quench stage of the patented apparatus and serving to recover heat from the combustion stage as well as from the heat recovery stage by a heat exchange fluid, such as water, flowing through the tubes. The pressure shell may closely encircle the water-wall, except along the lower end portion thereof, where diameter is such as to provide an annular outflow channel abruptly reversing flow of the downflowing gases within the heat recovery chamber and thereby effecting separation of solids from the product gas. A quench stage of residual solids is below the open lower end of the heat exchanger and constitutes the third, rather than the second, stage of the apparatus.
REFERENCES:
patent: 1722496 (1929-07-01), Chapman
patent: 2179638 (1939-11-01), Koppers
patent: 2931715 (1960-04-01), Eastman
patent: 3951615 (1976-04-01), Gernhardt et al.
patent: 3988123 (1976-10-01), Coates
Bashore S. Leon
Goldman Michael
Mountain Fuel Resources, Inc.
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