Aeration apparatus
OwnerEiichi Sugiurainventor
Life of this patent
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Abstract
Apparatus for supplying air into a liquid can be used as an aeration apparatus for a biochemical waste water treatment system operating according to an activated sludge process, for example, or as an air bubble generator to be used in a solid particle flotation system. A liquid in a tank is circulated by a pump. An air intake device is disposed in a suction pipe connected to the pump. The air withdrawn by the air intake device is mixed and agitated with the liquid in the pump, whereby minute air bubbles are distributed throughout the liquid. The liquid containing air bubbles is fed from the pump to an injector disposed within the tank, and ejected thereby into the tank in the form of jet water streams.
Claims5
An apparatus for supplying air to a liquid within a tank, comprising:
- a pump connected to a drive source;
- a suction pipe for feeding a liquid from the tank to the pump;
- a discharge pipe for returning the liquid from the pump to the tank;
- an air intake device disposed in the suction pipe and including a body having an air passage which provides a communication between the interior of the suction pipe and the atmosphere, a valve disposed in the air passage, and means including a conduit connecting the valve with the discharge pipe intermediate its ends for controlling the size of the air passage in accordance with the discharge pressure of the pump;
- and
- an injector disposed within the tank and connected to the outlet end of the discharge pipe and including a housing which defines an annular passage, means for connecting the outlet end of the discharge pipe to the annular passage, and a plurality of injection ports spaced apart around the housing and communicating with the annular passage.
Dependencies are inferred from the claim text.