Method and an installation for purifying industrial waste water,

Details Method and an installation for purifying industrial waste water, Method and an installation for purifying industrial waste water,

1983-01-17

1986-03-04

Bashore, S. Leon

Distillation: processes, separatory

With disparate physical separation

203 10, 203 40, 159 22, 159 171, 159 46, 159 473, 202174, 202177, 202197, 202200, 202202, 210917, B01D 126, C02F 104

Patent

active

045740364

ABSTRACT:
Polluted industrial waste water having a high chemical demand for oxygen and fine particles in suspension is purified using the following steps: directly heating and evaporating the polluted water without subjecting it to the usual prior steps of mechanical separation such as sieving or decanting; separating sludges from the evaporated water; condensing the evaporated water; subjecting the condensed evaporated water to a physico-chemical purifying process of the coagulation-flocculation type; and filtering the purified condensed evaporated water. The purified water is pure enough to be recycled through a dyeing works. The installation includes an evaporator (10) which is preferably built in several stages with the vapor from each stage other than the first being used to evaporate the polluted water in the next stage.

REFERENCES:
patent: 3469616 (1969-09-01), Laguilharre
patent: 3692634 (1972-09-01), Othmer
patent: 3716458 (1973-02-01), Greenfield et al.
patent: 3774840 (1973-11-01), Boatright
patent: 4010098 (1977-03-01), Fassell
patent: 4017421 (1977-04-01), Othmer
patent: 4279693 (1981-07-01), Kuhnlein et al.
patent: 4441437 (1984-04-01), Moskan
Judkins et al, Color Removal from Textile Dye Waste Using Magnesium Carbonate, Ala., Nov. 1978.
Journal WPCF, Nov. 1978, pp. 2446-2456.

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