Recovery of the heat content of corrosive and dust-containing ga

Details Recovery of the heat content of corrosive and dust-containing ga Recovery of the heat content of corrosive and dust-containing ga

1979-03-05

1981-03-24

Davis, Albert W.

Heat exchange

Regenerator

Checker brick structure

165 5, 55 73, 55 96, 55 82, 55269, 55261, F28D 1700, F28G 500

Patent

active

042574757

ABSTRACT:
The heat content of corrosion and dust particle-laden gases is recovered in a process employing at least two regenerators cyclically interchangeable. In the heat-release cycle, hot waste gases are passed through the regenerator in one direction, thereby releasing their heat content to the packing, e.g., quartzite rocks or porcelain Raschig rings. In the heat recovery cycle, a clean gas, e.g., superatmospheric air, is passed through the hot regenerator in the opposite direction, thereby recovering the heat content of the packing. Immediately prior to switching the regenerator from the heat release cycle to the heat recovery cycle, at least a portion of the high pressure recovery gas (e.g., air) from the regenerator operated in the heat recovery cycle is introduced into the warm end of the regenerator in the heat release cycle, thereby creating a high pressure switching surge. The switching surge is a purging step inasmuch as if effectively dislodges dust particles entrained in the packing and carries them to a downstream filter. The heat content of the resultant hot clean gas is recovered in a waste gas boiler of preferably a turbine, especially turbine coupled to a compressor for entering air.

REFERENCES:
patent: 675245 (1901-05-01), Richards et al.
patent: 710748 (1902-10-01), Cabot
patent: 3023836 (1962-03-01), Kasbohm et al.

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