Flow control system

Details Flow control system Flow control system

1975-04-02

1977-02-15

Cohan, Alan

Fluid handling

Processes

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

137 87, 1374875, 73 28, 73194E, G01F 100

Patent

active

040077543

ABSTRACT:
In a process for controlling a particle flow system which is to be operated at slightly above the velocity at which saltation occurs, a cross correlation technique is used to determine the spread of particle velocities in the system and this is compared with a signal representing the desired spread to produce an error signal indicating the desired mean velocity of particle flow. A second cross correlation technique, having a shorter integration period, is used to determine the actual mean particle velocity and this is compared with the first error signal to produce a second error signal to control the flow rate of the conveying fluid.

REFERENCES:
patent: 2948295 (1960-08-01), Smith, Jr.
patent: 3015768 (1962-01-01), Hornfeck et al.
patent: 3017556 (1962-01-01), Smoot
patent: 3595078 (1971-07-01), Beck et al.
patent: 3636763 (1972-01-01), Beck
patent: 3757808 (1973-09-01), Peterson
patent: 3914581 (1975-10-01), Gilson

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