Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1977-10-25
1979-02-27
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 18, 210 52, 210 80, 210 82, 210203, 210218, 210266, C02C 104, B01D 2936
Patent
active
041418247
ABSTRACT:
Methods and apparatus for purifying water by filtration, according to which water is passed in an upward direction through one or more sand beds supported in towers, at a slow rate of flow so that the sand bed is not disturbed. The sand bed or layer is relatively deep vertically to provide superior filtration. Raw water feed to each tower is accomplished by tangential flow from the inlets. Rapid backwash of the sand bed is accomplished by opening a dump valve at the lower end of a cone provided at the base of the tower in which the sand bed is supported. Maintenance and control of bacterial activity in the lower part of the sand bed enhances purification of the water by bacterial action. Chemical treatments of the water may be used in conjuction with the filtration, including treatments with chlorine, and with alum (i.e. aluminum sulphate and/or potassium or ammonium alum) to produce a floc, and barium sulphate and/or a drilling mud may be added to assist in removal of the floc by filtration.
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Composition and Properties of Oil Well Drillings, Rodgers, Gulf Publishing Co., Texas, 1953, pp. 146-150.
Fox, Jr. Carl B.
Hart Charles N.
Midcon Pipeline Equipment Co.
Therkorn Ernest G.
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