| 摘要 |
The plant has a cleaning device with which the parts of the plant, such as a heat exchanger (34) and an evaporator (42) of a heat pump circuit, through which waste water flows can be freed from dirt automatically by a cleaning liquid set in circulation by a cleaning pump (67). The control device of the heat recovery plant can be appropriately designed so that the cleaning process is carried out at night time when the level of operations is low. <IMAGE>
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