Process fluid circulation and temperature control system

Details Process fluid circulation and temperature control system Process fluid circulation and temperature control system

1976-02-17

1977-06-28

Wayner, William E.

Heat exchange

Movable heating or cooling surface

Rotary drum

2351511, 236 15BF, 236 17, G05D 2700

Patent

active

040319504

ABSTRACT:
A process liquid circulation and temperature control system including a pump for circulating water or other process liquid through a path including a heating unit, a cooling unit, and a process apparatus that is returned to the pump; the pump and the heating and cooling units are actuated in response to temperature/pressure variations sensed at the return from the process apparatus and at the delivery thereto. One pressure control measures the differential pressure across the pump and inhibits system operation except when the differential exceeds a predetermined magnitude in a given direction; another pressure control inhibits operation if the return pressure falls below a given threshold; a circuit that determines .DELTA.P/T prevents boiling of the process fluid. For both temperature and pressure controls, the delivery and return sensors are calibrated to match each other on system start-up.

REFERENCES:
patent: 3428250 (1969-02-01), Holthausen
patent: 3964975 (1976-06-01), Harrison
patent: 3981444 (1976-09-01), Weiss

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