Apparatus for concentrating waste liquid

Distillation: apparatus – Apparatus – Systems

Patent

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Details

622385, 622387, 202186, 202205, 203DIG4, 203 1, 203 2, 159 44, B01D 310, B01D 342, C02F 104

Patent

active

057700192

ABSTRACT:
When waste liquid is concentrated using a radiant heat section and a heat absorbent section of a heat pump circuit, in the proper place of the heating region of the heat pump circuit, a detector for detecting the pressure and/or temperature of the heat transfer medium is provided, or a detector for detecting the value of an electric current flowing through or the amount of electric power consumed in a system which includes a compressor for the heat pump circuit, is provided, and by the provision of a control system which can halt the concentration operation when the detected value exceeds a set value, both with a liquid in which the concentration of the non-volatile component is low so that a comparatively long time is required for the concentration operation, and, conversely, with a liquid in which the concentration of the non-volatile component is high so that the concentration operation is completed in a comparatively short time, the concentration operation has good efficiency, and can always be halted at a uniform liquor concentration.

REFERENCES:
patent: 3733994 (1973-05-01), Armstrong et al.
patent: 4003798 (1977-01-01), McCord
patent: 4299664 (1981-11-01), Smith
patent: 4556457 (1985-12-01), McCord
patent: 4585524 (1986-04-01), Hoiss
patent: 4828717 (1989-05-01), Deleeuw et al.
patent: 4940134 (1990-07-01), Aoki et al.
patent: 4961859 (1990-10-01), Uehara et al.
patent: 5004522 (1991-04-01), Kobashi

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