Fluidic density control for chlor alkali cells

Details Fluidic density control for chlor alkali cells Fluidic density control for chlor alkali cells

1989-05-22

1990-02-13

Cohan, Alan

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

137 91, G05D 1100

Patent

active

048997749

ABSTRACT:
The density of a caustic liquid is reduced by automatically adding water to the caustic when the specific gravity of the caustic is unacceptably high. A small stream of water is continuously directed over the head of a specially designed hydrometer. As long as the density of the caustic is within acceptable ranges, the stream of water flows uninterrupted over the head of the hydrometer and has no effect on the caustic. However, when the density of the caustic rises to unacceptable levels, the hydrometer rises and its head intercepts the stream of water and deflects it downwardly into the caustic, thereby diluting it. When sufficient water has been added to the caustic to bring its density back to acceptable levels, the hydrometer sinks and the water resumes flowing over the hydrometer to a collection station where it is recycled.

REFERENCES:
patent: 1990501 (1935-02-01), Poirier
patent: 4548226 (1985-10-01), Iino
patent: 4601306 (1986-07-01), Engelhardt
patent: 4613415 (1986-09-01), Wreath

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