Water reuse system incorporating vacuum pump sealing water in a

Details Water reuse system incorporating vacuum pump sealing water in a Water reuse system incorporating vacuum pump sealing water in a

1994-08-31

1995-05-23

Jones, W. Gary

Paper making and fiber liberation

Processes and products

Reclamation, salvage or reuse of materials

162264, 162363, 162189, 162279, D21F 166, D21F 148, D21F 176

Patent

active

054178096

ABSTRACT:
A papermaking water system utilizing vacuum pump sealing water and having a zero sealing water discharge. A group of water seal vacuum pumps are used in a papermaking machine to generate subatmospheric pressure in suction equipment and thereby extract water from a wet paper web. During operation of the vacuum pumps, the sealing water is heated and the heated water is discharged to a cooling tower to cool the water which is then recirculated to the vacuum pumps. Steam from a generating plant is supplied to the dryer drums in the dryer section of the papermaking machine, and the steam condensate is combined with the heated sealing water flowing to the cooling tower. By using steam condensate as makeup water, no ionic buildup will occur in the closed system, and high quality water is withdrawn from the closed system and may be used in other sections of the papermaking machine, so that there is no discharge of sealing water to the sewer system.

REFERENCES:
patent: 2771823 (1956-11-01), Lukemire
patent: 3801436 (1974-02-01), Prechtel
patent: 3833468 (1974-09-01), Boniface
patent: 3907630 (1975-09-01), Selander et al.
patent: 3988201 (1976-10-01), Smith, Jr.
patent: 4221630 (1980-09-01), Selander et al.
patent: 4466873 (1984-08-01), Bolton et al.

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