US 4,297,211 AGranted

Filtering apparatus

AssigneeInkomag

InventorsEdwin Hiesinger, Klaus Keplinger, Hermann Nessler

Life of this patent

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Abstract

An apparatus for the filtering of a fluid in which a filter-aid agent of a particulate or fibrous character is floated onto and deposited upon a support fabric in a fluid. The medium to be filtered is then passed through the filter layer formed by this filter aid. The fabric divides the filter chamber into two compartments both of which are flushed with washing liquid which is discharged from the upstream compartment after back-washing through the fabric. During the filtration, a loss of the purified filtrate and a mixture with nonfiltered medium is precluded in that both compartments, after the filtering and cleaning phases, are completely discharged of fluid. The back-washing of the fabric is effected with another fluid. The complete discharge is effected in the direction of flow of each medium through the respective compartment.

Claims45

Dependent claims

A filtering apparatus comprising:

a housing defining a filter chamber;
a rigid partition extending through said chamber and subdividing same into an upstream compartment and a downstream compartment communicating with said upstream compartment via throughgoing openings formed in said partition;
a support fabric overlying said partition and permeable to a fluid, said support fabric lying along a side of said partition turned toward said upstream compartment;
means including a closable inlet opening communicating with said upstream compartment and a closable outlet opening communicating with said downstream compartment for passing through said chamber from said upstream compartment to said downstream compartment a carrier medium entraining a particulate filter-aid layer onto said fabric in said upstream compartment;
means including a closable inlet opening communicating with said upstream compartment and a closable outlet opening communicating with said downstream compartment for passing a filterable medium through said chamber from said upstream compartment to said downstream compartment whereby said filterable medium traverses said layer and said fabric;
washing means including a closable inlet opening connectable with said chamber on the downstream side of said fabric and a closable outlet opening communicating with said upstream compartment at an upstream side of said fabric for passing a washing medium through said chamber from said inlet to said outlet opening and thereby backwashing said layer from said fabric and entraining material of said layer out of said chamber through said outlet opening;
means to close each of said inlet and outlet openings;
and
displacement means for downstream removing media residues completely from each of said compartments.

6 more elements

A filtering apparatus comprising:

a housing defining a filter chamber;
a rigid partition extending through said chamber and subdividing same into an upstream compartment and a downstream compartment communicating with said upstream compartment via throughgoing openings formed in said partition;
a support fabric overlying said partition and permeable to a fluid, said support fabric lying along a side of said partition turned toward said upstream compartment;
means for passing through said chamber from said upstream compartment to said downstream compartment a carrier medium entraining a particulate filter-aid layer onto said fabric in said upstream compartment;
means for passing a filterable medium through said chamber from said upstream compartment to said downstream compartment whereby said filterable medium traverses said layer and said fabric;
washing means including an inlet opening connectable with said chamber on the downstream side of said fabric and an outlet opening communicating with said upstream compartment at an upstream side of said fabric for passing a washing medium through said chamber from said inlet to said outlet opening and thereby backwashing said layer out of said fabric and entraining material of said layer out of said chamber through said outlet opening, the washing means including two closable inlet openings and means to close each of said inlet openings, each of said inlet openings communicating with a respective one of said compartments at one lateral edge thereof, said outlet opening communicating with said upstream compartment at a location spaced from said lateral edge of across a width of the fabric, said means for passing said carrier medium through said chamber and said means for passing said filterable medium through said chamber each including a closable outlet opening communicating with said downstream chamber;
and
a respective movable wall flanking each side of said partition and defining the respective compartment with said fabric, the side of said partiion facing the wall defining said downstream compartment being free from a support fabric and said wall defining said downstream compartment being sealably engageable with said partition to block the throughgoing opening therein.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/070,799Filed 29 Aug 1979 · continuation in part
Priority: AT 3609/7720 May 1977
Granted: 27 Oct 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C07C 255/00
Carboxylic acid nitriles
B01D 29/01
Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00;…:…
B01D 29/66
Regenerating the filter material in the filter: by flushing, e.g. counter-current air-bumps
B01D 37/02
Processes of filtration: precoating the filter medium; Addition of filter aids to the liquid being filtered