Process and apparatus for concentrating corrosive liquid using r

Details Process and apparatus for concentrating corrosive liquid using r Process and apparatus for concentrating corrosive liquid using r

1977-05-31

1979-08-14

Yudkoff, Norman

Concentrating evaporators

Film type

Moving film

423531, 159 24A, 159 49, B01D 122

Patent

active

041644417

ABSTRACT:
A corrosive liquid such as sulphuric acid is concentrated using two spaced concentric tubes. A film of the acid flows down the inside of the inner tube and hot flue gases contact the outside of the outer tube. Advantageously, the inner tube transmits radiant energy, e.g. is made of quartz, so the outer tube heats the inner tube by radiation. This absence of mechanical stress on the inner tube increases its life. The water vapor is taken off at the top of the inner tube and concentrated solution at the bottom. If desired, the tubes could be reversed with the flue gases going through the inner tube and the outer tube being of quartz with the liquid flowing on its outside.

REFERENCES:
patent: 2753594 (1956-07-01), Buck
patent: 2758061 (1956-08-01), Geller
patent: 3004901 (1961-10-01), Nerge et al.
patent: 3500893 (1970-03-01), McReynolds
patent: 3933575 (1976-01-01), Guth et al.

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