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    • 4. 发明专利
    • TREATING DEVICE OF WASTE OF READY MIXED CONCRETE
    • JPH07195099A
    • 1995-08-01
    • JP35520093
    • 1993-12-29
    • TANII KOGYO KK
    • TANII KIYOSHI
    • C02F1/40B09B5/00B28C9/00C02F1/24C02F11/12
    • PURPOSE:To remove a chemical admixture and to adjust the properties of sludge water so as to improve dehydration efficiency by providing means of supplying the sludge water from a sludge tank to a pretreating vessel, subjecting the sludge water to air diffusing and agitating, scraping air bubbles into the U-channel of the pretreating vessel, etc. CONSTITUTION:The waste water of ready mixed concrete, etc., is supplied from a car washing trough 1 to a trommel 2 where gravel, etc., are separated from the waste water; thereafter, the sludge water is supplied to the sludge tank 3 and a sand pump 8 connected to a lifting machine 19 is operated therein. The fine air is supplied via an air diffusion pipe 18 from a compressor 7 to the sludge water in the pretreating vessel 6. Further, the air bubbles floating on the water surface are scraped by a scraping machine 20 to the U-channel 10. Makeup water is supplied from a filter water branch pipe 16 to the U- channel 10. The water and the air bubbles are supplied to a plant feed water tank 12. On the other hand, the overflow water of the filter water tank 13 is admitted into the plant feed water tank 12. The sludge from which the air bubbles are removed is supplied by a press feed pump 5 into a dehydrating machine 4.