Drain treatment system

Abstract

A drain treatment system capable of achieving balance of pressure between a facility apparatus and a drain treatment apparatus with a simple structure is provided. A bottom part of a heat, exchangeris connected with a top part of a drain tankby a drain discharge pipe. The drain discharge pipehas a balance pipe-connecting tubeThe balance pipe-connecting tubecomprises: a balance pipe-connecting part; a communicating tube-connecting part; and a communicating passagewhich connects both the parts therein. The top part of the drain tankis connected with the balance pipe-connecting partby a balance pipe. Further, the communicating tube-connecting partis connected with a lower part of the heat exchangerby a communicating tubewhich passes through the drain discharge pipe. If a drain level of the heat exchangeris below an open end of the communicating tubeon the side of the heat exchanger, the balance of pressure is achieved between the heat exchangerand the drain tankby the balance pipe, the communicating passage, and the communicating tube, allowing the drain from the heat exchangerto be smoothly discharged into the drain tankthrough the drain discharge pipe