| 摘要 |
A method and plant for the recovery of heat from sewage water is characterized in that the sewage water from the upper part of a collecting cistern (9) is led to a heat exchanger unit (14) and therefrom again to the lower part of the cistern (9). A heat exchange medium such as water is circulated (20, 21) through the heat exchanger unit in a counterflow relative to the sewage water, whereby the heat absorbed in the heat exchange medium from the sewage water is recovered in the evaporator (23) of a heat pump (22). The heat exchange unit (14) comprises pipe coils (15) through which the heat exchange medium flows and which are located in annular chambers through which the sewage water flows. The pipe coils are cleaned by brushes on a rotating arm (Fig. 3). <IMAGE> |
