Method and apparatus for automatically mixing a solution having

Details Method and apparatus for automatically mixing a solution having Method and apparatus for automatically mixing a solution having

1979-04-23

1981-02-24

Cline, William R.

Fluid handling

Processes

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

137 91, 137391, 222 64, G05D 1113

Patent

active

042521394

ABSTRACT:
A method and apparatus for automatically mixing a solution having a specified concentration is disclosed. The apparatus comprises: a storage tank, means for automatically introducing water into the tank, means for slowly introducing salt into the tank, and means for terminating the introduction of salt into the tank when the specific gravity of the tank reaches a specified value. Means are provided for preventing withdrawal of solution during the mixing cycle. The method includes the steps of: storing salt solution of the desired concentration in a vessel; withdrawing solution from the vessel; adding water to the vessel after the level of solution in the vessel falls below a specified level and after the withdrawal which lowered the level below the specified level is complete; adding salt to the vessel, terminating the addition of salt to the vessel when the specific gravity of the solution reaches a specified value and preventing the initiation of withdrawal of solution from the vessel after the level in the vessel has been lowered below the specified level until the vessel is again filled with solutions having the specified specific gravity. A control circuit for carrying out the method is disclosed.

REFERENCES:
patent: 3004544 (1961-10-01), Guptill, Jr.
patent: 3074277 (1963-01-01), Hill
patent: 3710811 (1973-01-01), Leverenz et al.
patent: 3901724 (1975-08-01), White

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