Liquid treatment apparatus
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United States of America Patent
Stats
-
Mar 8, 1983
Grant Date -
N/A
app pub date -
May 11, 1981
filing date -
May 11, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In liquid sedimentation and clarification apparatus recirculation of previously settled solids is automatically controlled. Nozzles in an updraft tube produce a suction or pumping force for recirculating such solids, and a flow passage in alternate nozzles is kept closed at low inlet flow rates for untreated liquid. At higher flow rates the closed flow passages are gradually opened by the increased force of the incoming liquid acting against spring biased or weighted valve closure members.
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