| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum generator in a vacuum sewage disposal system absorbing no air into a pump and generating hardly foam. SOLUTION: When the pump 44 is operated, sewage in a sanitary wastewater tank 10 is supplied to an ejector 40 from the pump 44 through the piping 42, and it is ejected downward from an ejection port of the ejector 40. Negative pressure occurring in the ejector 40 is transferred to an inflow-pipe 20 through a check valve 36 and a sluice valve 30, and the sewage in a vacuum sewer flows down to the sanitary wastewater tank 10. The sewage ejected from the ejector 40 is hit against a water receiving plate under the water surface, so that the air absorbed in the sewage to be ejected does not reach the depth of the sewage in the sanitary wastewater tank 10, the sewage ejected from the ejector is not splashed, and the generation of foam is little. Since a foam protection plate 26 is provided, the inflow of foam into a ventiduct 24 can be prevented.
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