Device for the purification of gas, especially combustion gas

Details Device for the purification of gas, especially combustion gas Device for the purification of gas, especially combustion gas

B - Operations, Transporting

01

D

23/425

B01D 53/34 (2006.01)

Patent

CA 1248737

ABSTRACT OF THE DISCLOSURE Each of a pair of heat exchangers in a combustion plant includes a storage space holding basic granules, and will alter- natingly be flowed through by combustion gas and air, respec- tively. Residual heat from the combustion gas will be absorbed by the granules, and the moisture content of the gases will con- dense upon the granules. Sulphur dioxide in the combustion gas will react with the basic material to calcium sulphite, and the moist granules will catch ash particles and other contaminants in the gas. When valves have been re-set, air is made to pass through the granules, whereby it will be preheated. The heated air may be conducted to a burner, to a regeneration apparatus for the granules, or through a conduit to the gas exhaust duct. After some time of operation the granules are transferred to the regeneration apparatus, which includes a rotatable drum, where the granules will be subjected to mechanical working and separa- tion of calcium sulphate and dust particles, preferably while being heated.

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