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    Filter casing and process of operating the same
    17.
    发明授权
    Filter casing and process of operating the same 失效
    过滤套管和工艺流程相同

    公开(公告)号：US1774044A

    公开(公告)日：1930-08-26

    申请号：US6529225

    申请日：1925-10-28

    Applicant: SWEETLAND ERNEST J

    Inventor： SWEETLAND ERNEST J

    IPC: B01D33/09 ,  B01D35/31

    CPC classification number: B01D33/09 ,  B01D33/23 ,  B01D33/466 ,  B01D33/60 ,  B01D33/663 ,  B01D33/72 ,  B01D33/807 ,  B01D35/31 ,  B01D2201/282 ,  B01D2201/48

    Abstract: 361,920. Filters. SWEETLAND, E. J., Piedmont, California, U.S.A. Aug. 22, 1930, No. 25172. [Class 46.] A rotary or other suction filter is placed in a closed casing which is charged with compressed air or other gas during operation of the filter. As shown a rotary disc filter with the trough 18 into which it dips is supported on rails 6 in the casing 1. Gas under pressure is supplied to the casing through a pipe 33. The liquid under treatment is supplied to the trough 18 through a pipe 32 which can be connected by a union 47 to a main 46. The distributing valve at the end of the filter shaft is connected by hose pipes 23, 54, 60 and mains 48, 52, 57 to suction for withdrawing the filtrate and for drying the cake and to a source of gas under pressure for facilitating the detachment of the cake from the sectors of the filter discs. The cakes are detached by scrapers 30 and directed by an apron 31 into a hopper 9, along which the matter is moved by a screw 10 to a discharge valve 38. The filter is rotated by an electric motor 24, to which current is conveyed through leads 44. A manhole 39 may be provided with an air lock chamber through which an operator can enter the casing while the filter is working. Liquid overflowing from the trough 18 collects in the bottom of the casing and is discharged through a float-controlled valve 13 and pipe 12. A compresser 61, Fig. 3, forces gas into a tank 62 from which it is delivered through a pressure-control valve 64 to the main 33 and at a slightly higher pressure to a tank 65 connected to the main 57. Liquid under treatment is supplied from a tank 69 by a pump 70 to the main 46 and tne liquid discharged through the pipe 12 is returned to the tank 69. When the end cover of the casing is removed the filter with the trough 18 and the motor 24 can be withdrawn on rails 71. Nitrogen, carbon dioxide, and sulphurous gas are mentioned as suitable gases which can be supplied to the casing instead of air.

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