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    • 10. 发明专利
    • DRAINAGE PROCESSING METHOD FOR DRY CLEANER
    • JPH04164499A
    • 1992-06-10
    • JP28846890
    • 1990-10-29
    • MITSUBISHI HEAVY IND LTD
    • YAMADA KIYOMI
    • D06F43/08
    • PURPOSE:To eliminate bedewing in a duct, exhaust outdoors as a gas using a dedicated blower, and thereby nullify waste water by removing solvent by aeration method, etc., from the drainage which comes out chiefly from clothing when dry cleaning is performed, heating the drainage, lowering its relative humidity, and releasing outdoors as a gas by dedicated blower. CONSTITUTION:If drainage from dry cleaning is discharged as it is in the case with a machine using perchloroethylene as solvent, the solvent content of the waste water amounts to 150-200ppm. The content can however be reduced to below 0.1ppm by subjecting it to an aeration device 4. This is then atomized by ultrasonic, centrifugal humidifying, or spraying process, or is evaporated by an evaporator device 8, and is mixed with the outside air in order to prevent from being cooled in duct to lead to bedewing. The mixture is passed through a duct 14. Further this gas is heated to lower its relative humidity for elimination of risk of bedewing and is released outdoors in the form of gas using a dedicated blower 13. Thus waste water can be nullified.