Waste water emptying circuit - has initial and final stages which both employ compressed air

摘要

The installation is to empty or move waste water and the flow is periodically interrupted. The delivery pipe (16) has, downstream of a non return valve (17), a pipe (18) connected to a receiver (19). When emptying, liquid flows simultaneously in the delivery pipe and the receiver. The receiver holds a gas (20) which compresses as it is filled and expands to evacuate it. The receiver has a valve (21) for filling with gas (such as air). It can also include a spring accumulating energy during filling, and given up during emptying. Air (14) is used initially to empty the first container (11).