Resin interface detection system

Details Resin interface detection system Resin interface detection system

1983-05-12

1985-12-17

Krawczewicz, Stanley T.

Fluid handling

Processes

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

324 65R, 324 61R, F17D 300, F17D 301

Patent

active

045587140

ABSTRACT:
An improved method and system that utilizes conductance values of cationic and anionic exchange resins classified as layers of a mixed resin bed to automatically detect interfaces between the layers is disclosed. The arrangement includes electrical circuitry which initially samples the conductivity of a passing resin slurry. The initial conductivity value is compared to subsequent conductivity values of the passing slurry and the flow of the passing slurry is automatically terminated when the subsequent conductivity value is a certain fraction of the initial conductivity value. Termination in response to this equality condition effectively detects the interface between classified layers of a mixed resin bed.

REFERENCES:
patent: 3741683 (1973-06-01), McTamaney
patent: 4061570 (1977-12-01), Fletcher
patent: 4264439 (1981-04-01), Lefevre
patent: 4265262 (1981-05-01), Hotine
patent: 4265263 (1981-05-01), Hobbs
patent: 4298696 (1981-11-01), Emmett
patent: 4323092 (1982-04-01), Zabel

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