Heat regenerator to recover both sensible and heat of condensati

Heat exchange – Regenerator – Movable heat storage mass with enclosure

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165 8, 165913, 165 5, 165 10, 122421, 122DIG1, 432180, F28D 1904

Patent

active

047037946

ABSTRACT:
A compact and maintenance-free means and method of regenerating the sensible heat from flue gases of fossil fuel furnaces by heat exchange through two circular layers of rock beds rotating under two semi-circular mantles with the first mantle applying hot flue gases to the beds and the second withdrawing preheated ambient air needed for combustion by said furnaces. When used for power plant flue gas treatment, layers of acid-resistant pipes containing boiler feedwater are sandwiched between the two rock bed layers to usefully recover the heat units arising from moisture condensation. The enormous water of condensation collects flyash and sulphur dioxide thus removing these pollutants from the stack gases. The heavy rock beds rotate slowly beneath the fixed mantles in a circular, pan-shaped, steel vessel floating on and cooled by a circular pond of water. Friction of rotation is minimal and gas leakage principally prevented by liquid seals. When flue gas temperature rises, as above 600 degrees F., additional heat exchange capacity is increased by increasing speed of rotation, top bed of pebbles having a size around one to two inches need only be about one foot thick. This bed rests on layers of volcanic rocks five feet or more in thickness and sized each by layer downward from three to six inches in diameter to allow the cleaned and cooled flue gases to escape radially outward to the peripheral rim.

REFERENCES:
patent: 1912784 (1933-06-01), Miller et al.
patent: 2803439 (1957-08-01), Fibenscher
patent: 2913228 (1959-11-01), Fibenscher
patent: 3144903 (1964-08-01), Stockman
patent: 4398590 (1968-08-01), Leroy

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