# US 4,635,322 A · Fiber washer

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- Number: US 4,635,322 A
- Document ID: US4635322A
- Status: Granted
- Kind: A
- Application number: 06/663,591
- Filed: 1984-10-22
- Granted: 1987-01-13
- Earliest claimed: 1984-10-22
- Assignees: Process Evaluation and Development Corporation
- Inventors: Eduardo J. Villavicencio; Jorge E. Arana
- Web page: https://patentgrep.com/patent/US4635322A

## CPC

- B03B 7/00: Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
- B03B 5/28: by sink-float separation
- D01B 1/42: employing liquids
- D21D 1/40: Washing the fibres
- B03B: SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- D01B: MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING (crude extraction of asbestos fibres from ores B03B; apparatus for retting D01C)
- D21D: TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE

## Abstract

An improved fiber washer provides for a water recirculation technique which assists in moving the fibers through the washer and assists in the separation of heavy debris from the fibers.

## Claims

### Claim 1

An improved U-shaped washer for cleaning fibrous materials comprising a plurality of roller mounted tines in one leg of said U-shaped washer to move said fibrous materials to the apex of the U-shaped washer while continuously submerging said fibrous materials; a deepened section at the apex of the U-shaped washer, and roller mounted paddles to move fiber from the apex of said U-shaped washer to the end of the other leg of said U-shaped washer, the improvement comprising means to remove water from the other leg of the U-shaped washer, cyclone means to remove particulate matter from the removed water, pump means to pressurize the removed water and conduit means to flow one part of said removed water tangentially into the apex of said U-shaped washer to thereby additionally propel fibrous materials through the apex of said U-shaped washer and another part upwardly into the other leg of said U-shaped washer to assist in centering the fibrous material in said other leg.

### Claim 2 (depends on 1)

An improved washer for cleaning fibrous materials as in claim 1 wherein said means flows removed water into the other leg of said U-shaped washer at a plurality of locations.

### Claim 3 (depends on 1)

An improved washer for cleaning fibrous materials as in claim 1 comprising particulate matter removal means after said pump to remove particulate material from the pressurized removed and treated water prior to flow tangentially into said U-shaped washer.

### Claim 4

An improved method for washing a fibrous material using a U-shaped washer comprising feeding a fibrous material into one leg of said U-shaped washer, propelling said fibrous material to the apex of said U-shaped washer which is deepened to permit heavy solids to settle downwardly, and propelling said fibrous material to the end of the other leg of said U-shaped washer to remove the washed fibrous material therefrom, the improvement comprising removing water from the other leg of the U-shaped washer, treating said removed water to remove particulate matter therefrom flowing one part of said treated water tangentially into the apex of said U-shaped washer to propel the water around said apex and to prevent fibrous material from settling into the deepened areas in the apex of said U-shaped washer and flowing another part of said treated water upwardly into the other leg of said U-shaped washer to center the fibrous material in said other leg.

### Claim 5 (depends on 4)

An improved method for washing a fibrous material as in claim 4 wherein removed and treated water is added to the other leg of the U at a plurality of locations.

### Claim 6 (depends on 5)

An improved method for washing a fibrous material as in claim 5 wherein said fibrous material is bagasse.

### Claim 7 (depends on 5)

An improved method for washing a fibrous material as in claim 5 wherein said fibrous material is bagasse.