Heat exchange – Regenerator – Checker brick structure
Patent
1985-04-01
1987-06-30
Davis, Jr., Albert W.
Heat exchange
Regenerator
Checker brick structure
165 4, 165 5, 165 7, 55 73, 55 84, 55269, F28D 1702
Patent
active
046762990
ABSTRACT:
A simple method to prevent air pollution from the particulate and gaseous pollutants from power plants, by recuperating the heat in the flue gases down to atmospheric temperature and pre-heat the air needed from combustion in the boilers. Most fly ash is removed at the face of the regenerators. Condensed moisture from the flue gases dissolves SO.sub.2 and forms a smog, with remaining fly ash particles acting as condensation nuclei, which are caught on the wetted surfaces within the regenerator, washed therefrom to vessels to settle out solids, and the liquid is then treated by vacuum to recover the dissolved SO.sub.2, which is compressed to liquid SO.sub.2 and stored in refrigerated tank cars, to be sold as a valuable byproduct. The bulk of the fly ash, which settles on the face of (45 degree) sloping "snow fences" built across the top of the pebble bed, slides like snow off of a sloping roof and into gutters with perforated false bottoms, up which flows a little gas and carry it to downspouts and bins. The very fine fly ash travels with the flue gas downwardly to become smog when combining with the water of condensation and absorbed SO.sub.2. Cold wash is periodically used to flood to top of the bed and wash out any accumulations of fly ash.
REFERENCES:
patent: 1798370 (1931-03-01), Cox
patent: 2766969 (1956-10-01), Cooper et al.
patent: 2863723 (1958-12-01), Tigges
patent: 4171722 (1979-10-01), Huggins
patent: 4398590 (1983-08-01), Leroy
Davis Jr. Albert W.
Energy Conservation Partnership Ltd.
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