| 摘要 |
Sewage lift stations comprising a tank or well into which sewage flows through an inlet a suitable height above the bottom of the tank to provide for collection of a desired quantity of sewage after which it is automatically pumped out of the tank to a higher level from which it flows by gravity to the next lift station or to a treatment plant or other disposal system. A sewer gas deactivation and deodorizing unit comprising a suitable heating and burning unit utilizing, as the primary source of heat, a gas burner which may either simply heat the sewer gas as it is drawn from the tank by a blower and blown through the heating unit or which may premix the sewer gas and the air and gas supplied to the burner so that the mixed gas burns directly. Air is supplied to the tank from the atmosphere through a relatively small inlet pipe at a point adjacent to the inner wall of the tank through an inlet opening or nozzle extending substantially peripherally horizontally preferably about one-fourth to one-third of the depth of the tank down from the top so as to direct air peripherally over the inner wall surface of the tank in order to produce a circulatory scavenging flow of mixed air and gas in the tank over the exposed part of this surface. The mixed air and gas is withdrawn from the tank through an exhaust pipe which is relatively much larger than the air inlet and which has intake preferably at about one half the depth of the tank and centrally thereof a predetermined distance above the maximum height of sewage in the tank. This assures a good mixture of the air and sewer gas before it is withdrawn and places the gas exhaust intake at or near the center of a vortex circulation of the mixed gas. Provision is made for stopping the exhaust blower under abnormal operating conditions, such as an excessive rise in the level of the collected sewage or nonfunction of the gas deactivator.
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