Microporous plate and method for manufacturing the same and suct

Details Microporous plate and method for manufacturing the same and suct Microporous plate and method for manufacturing the same and suct

1986-12-03

1989-08-15

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Means to remove liquid from treated material by contact with...

34 9, 34 90, 34 92, F26B 1900

Patent

active

048562041

ABSTRACT:
A method for manufacturing a microporous plate, a filter plate obtained from the method, and suction drier apparatus utilizing such filter plates are disclosed. According to the method, a casting mix is introduced into the interior of a gypsum mold whereupon water is absorbed from the casting mix into the gypsum so that a crust remains on the inner surface of the mold. The crust is allowed to develop to an appropriate thickness whereupon the remaining casting mix is drained from the mold. The inner surfaces of the crust are allowed to dry whereupon the interior space defined between opposed crust wall portions is filled with a granular material which preferably has the same composition as the crust material. A filter plate comprises a pair of opposed suction walls defining an interior space between them which is filled with a granular material. The suction drier apparatus includes at least one of the filter plates which is mounted to be moved into and out of a basin or the like in which material to be dewatered is present. In one embodiment, the suction drier apparatus includes several filter plates mounted in a circular array around a rotating shaft. A negative pressure is applied to the suction walls of each plate whereby water or other liquid is suctioned from the material to be dewatered through the suction walls into the interior space within the filter plate and then drawn under the negative pressure out of the plate structure.

REFERENCES:
patent: 4357758 (1982-11-01), Lampinen
patent: 4686776 (1987-08-01), Matsubara

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