Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Patent
1979-12-26
1981-03-31
Spitzer, Robert H.
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
210197, 210220, 210256, 210261, C02F 1102, C02F 320
Patent
active
042591856
ABSTRACT:
Sludge thickening apparatus comprising a vertical tank including sludge inlet and outlet pipes, and a discharge pipe weir; a vertical hopper within the tank having walls which diverge outwardly from a hopper bottom toward a top opening wherein the weir has openings communicating with the hopper interior; a cover plate closing the top opening and having a raised central portion with an opening; and a baffle plate spaced from the bottom opening and having an opening therethrough. A vertical airlift member is supported by the bottom of the tank and extends through the baffle opening, the bottom opening and communicates with the cover opening. An assembly including an air shut-off valve selectively controls air to the airlift member whereby the shut-off valve is closed when the outlet pipe is opened.
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patent: 3765727 (1973-10-01), Santangelo et al.
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Spitzer Robert H.
Yeager Arthur G.
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