Recovery system for heat in waste water - has heat exchanger upstream of which are coarse and fine filters

摘要

The arrangement for recovery of heat in wast water has a heat exchanger and wast water filter. A conventional hot water system is connected to a waste water heat exchanger so that fresh water is fed into the hot water system after it has passed through the heat exchanger. The heat exchanger has a coarse filter and a downstream fine filter. The filtered waste water is passed through a two way valve for disposal into sewage system. The second outlet leads to the waste water heat exchanger. The flow of waste water is controlled by a temperature sensor in the heat exchanger.