Method and an apparatus for extracting a liquid from a sludge

Details Method and an apparatus for extracting a liquid from a sludge Method and an apparatus for extracting a liquid from a sludge

1989-09-28

1991-06-04

Jones, W. Gary

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210733, 210737, 210745, 210770, 210781, 210787, 210800, 210806, 210 85, 210 961, 210143, 2101981, 210216, 2103601, 210400, 494 37, 100 35, 100152, B01D 2101, B01D 2982, B01D 3304

Patent

active

050211668

ABSTRACT:
An apparatus for extracting liquid from a sludge/conditioning agent mixture which comprises a first endless belt (10) of filter material; a second endless belt (12) of filter material; and rollers (20, 21, 22, 23, 24, 25, 26, 27, 13, 14, 15) for the belts (10, 12). That part of the belt (10) between the rollers (20, 23) is defined as a gravity de-watering zone; the part of the belts (10, 12) between the rollers (21, 13, 14, 15) is defined as a pressure de-watering zone. Filtrate is collected in a tray (17); liquid is collected in a tray (35). Monitoring means monitors a characteristic of the filtrate and the liquid to enable a rate of change in the characteristic of the filtrate/liquid to be determined. The apparatus functions at its optimum at a loading rate for the mixture which is just less than that which causes extrusion of the liquid in the pressure de-watering zone.

REFERENCES:
patent: 4192743 (1980-03-01), Bastgen et al.
patent: 4330411 (1982-05-01), Florin et al.
patent: 4358381 (1982-11-01), Takeuchi et al.
patent: 4402834 (1983-09-01), Bastgen et al.
patent: 4836100 (1989-06-01), Johnson
patent: 4867886 (1989-09-01), Botkins, Jr.

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