Filter comprising multiple layers of non-woven filter fabric of

Details Filter comprising multiple layers of non-woven filter fabric of Filter comprising multiple layers of non-woven filter fabric of

1992-05-04

1993-12-14

Dawson, Robert A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

2104972, 55487, 55524, 55DIG24, B01D 3902

Patent

active

052699250

ABSTRACT:
An apparatus and method for removing particles from refinery fluid hydrocarbon and organic streams comprising an elongated housing containing multiple layers of non-woven fabric arranged in said housing as discrete stratified layer array of filter fabric of increasing particle retentive power thus arranged in the housing in the direction of fluid flow. The fabric layer comprise thermally stable materials of different permeability which are mineral coated to provide structural, fluid compression resistance, and to which flint or talc particles are added to impact surface roughness to the fibers. A final layer of uncoated needled felt fine fabrics end caps the array. In operation the refinery fluid is passed through the filter array such that the direction of fluid flow is in the direction of increasing retentive power of the filter fabric array. The use of fabrics rather than particle beds permits the use of separation units of vertical upflow configurations in which gravity assists in particle retention and removal.

REFERENCES:
patent: 3937860 (1976-02-01), Gusman et al.
patent: 3975565 (1976-08-01), Kendall
patent: 4206034 (1980-06-01), Broadhurst
patent: 4324574 (1982-04-01), Fagan
patent: 4427425 (1984-01-01), Briggs et al.
patent: 4726989 (1988-02-01), Mrozinski
patent: 4938786 (1990-07-01), Tonomoto
patent: 4965032 (1990-10-01), Pall
patent: 4976858 (1990-12-01), Kadoya
patent: 5085773 (1992-02-01), Danowski
Kirk-Othmer Encyclopedia of Chemical Technology 3rd Edition vol. 10 "Filter Media" pp. 293-297.

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