Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-03-10
1978-06-13
Adee, John
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 14, 210 63R, 210 71, 210178, 210181, 210187, 210195R, 210220, C02B 134, C02C 102
Patent
active
040947742
ABSTRACT:
Aerobically decomposable liquors are oxygenated by continuously extracting a portion thereof from an aeration tank and saturating the liquor portion with oxygen within a separate receiver tank, thereafter returning the oxygenated liquor portion to the aeration tank. The continuously flowing liquor portion is cooled prior to its oxygenation so that its oxygen-absorbing capability is increased. Cooling is effected by extracting therefrom the heat required to gasify the initially liquified gas being introduced into the receiver tank as the oxygenating medium. Secondary cooling of the liquor portion before its oxygenation can be effected by extracting therefrom an additional amount of heat as required to gasify a second liquified gas, such as nitrogen. Such heat exchange may be conducted in a separate heat exchanger, but is preferably conducted via parallel and adjacent heat-conductive sections of the liquified gas and liquor supply conduits which are disposed within the bottom portion of the receiver tank so that they are immersed in the collecting oxygenated liquor, which then serves as the heat-conducting medium between them. Oxygen absorption capability of the liquor is further increased by the above-atmospheric pressure maintained within the receiver tank. The oxygenated liquor collects as it flows from a vertical baffle plate located in the upper section of the receiver tank and against which sprays of the incoming raw liquor are directed. Preferably, the oxygenating gas is oxygen. Reintroduction of the oxygenated liquor is via a conduit extending along the bottom of the aeration tank and having laterally directed openings for emitting the liquor. Slow, uniform and continuous mixing of the liquors within the aeration tank and independently of the oxygen-transferring operation is effected by non-turbulent mixing apparatus, preferably a vertically reciprocating paddle-type flocculation apparatus having an additionally longitudinally extending and transversely oscillating paddle for imparting horizontally directed mixing in addition to the vertical mixing imparted by the up and down movement of the conventional vertically moving paddles. Alternative mixing apparatus is also described. Continuous non-turbulent extraction from the aeration tank of the liquor portion to be treated in the receiver tank is by a high capacity, low head pump.
REFERENCES:
patent: 2559462 (1951-07-01), Pirnie
patent: 2638444 (1953-05-01), Kappe
patent: 3359200 (1967-12-01), Gitchel et al.
patent: 3547815 (1970-12-01), McWhirter
patent: 3623977 (1971-11-01), Reid
patent: 3737382 (1973-06-01), Fletcher et al.
patent: 3755142 (1973-08-01), Whipple, Jr.
patent: 3817048 (1974-06-01), Burley
patent: 3835048 (1974-08-01), Walter
Carter Bulletin D661 - Walking Beam Flocculation, 1966, Ralph Carter Co., Hackensack, N.J.
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