Vacuum concentrating plant

Details Vacuum concentrating plant Vacuum concentrating plant

1994-06-14

1995-05-23

Kilner, Christopher

Refrigeration

Processes

Fractionally solidifying a constituent and separating the same

623243, B01D 100, C02F 122

Patent

active

054170842

ABSTRACT:
In a vacuum concentrating plant, a feed liquid supplied into a vacuum pan evaporator is heated indirectly by a latent heat by introducing depressurized vapor into a steam jacket added to an outer periphery of a lower portion of the vacuum pan evaporator. In this manner, the feed liquid in the vacuum pan evaporator is boiled and concentrated in a concentrating zone within the vacuum evaporator. The depressurized vapor used for heating the feed liquid is obtained by heating water in a depressurized vapor generator by means of a heating source in a heat pump. On the other hand, the vapor generated in the vacuum evaporator is cooled and condensed in a vapor condenser by means of a cooling source in the heat pump and removed in the form of a drain outside a circuit system. A concentrate as a product is withdrawn outside the circuit system through a concentrate withdrawing line by an operation of a pump. Thus, in this vacuum concentrating plant, it is possible to provide a high heat efficiency, an excellent stability of the operation and a low running cost by a combination of the vacuum pan evaporator, the depressurized vapor generator and the heat pump. Further, it is possible to concentrate the feed liquid at a low temperature of 60.degree. C. or less.

REFERENCES:
patent: 3376652 (1968-04-01), Hernandez, Jr.
patent: 3494139 (1970-02-01), Shapiro et al.
patent: 3501924 (1970-03-01), Ashley
patent: 3574950 (1971-04-01), Dantoni
patent: 3820349 (1974-06-01), Styron et al.
patent: 4016657 (1977-04-01), Passey
patent: 4973387 (1990-11-01), Osterman et al.
patent: 5137739 (1992-08-01), Roodenrijs

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