Recovery of water and solids in a paper mill

Details Recovery of water and solids in a paper mill Recovery of water and solids in a paper mill

1994-12-13

1996-09-24

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

162 29, 162189, 162190, 210716, 210717, 210726, 210737, 210928, C02F 152

Patent

active

055587828

ABSTRACT:
There is disclosed a process for separating fine solids from water in the used water recovery system of a sheet forming mill, wherein the used water recovery system includes at least one stage in which an alkaline earth metal carbonate is precipitated in the aqueous suspension constituting the used water whereby the particulate material present in the used water becomes entrained in the alkaline earth metal carbonate precipitate. By the invention it is possible to recover the water and the fine solid materials which pass through the wire mesh belt of a paper or board forming machine, and optionally recycle those recovered materials.

REFERENCES:
patent: 2470577 (1949-05-01), Roderick et al.
patent: 3152001 (1964-10-01), Podschus et al.
patent: 3262877 (1966-07-01), Le Compte
patent: 3639206 (1972-02-01), Spruill
patent: 3736254 (1973-05-01), Croom
patent: 3833463 (1974-09-01), Croom
patent: 5082887 (1992-01-01), Brown et al.
patent: 5262006 (1993-11-01), Anderson et al.
TAPPI Monograph Series No. 30, Paper Coating Pgments, pp. 34-35.

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