Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1983-07-11
1984-03-27
Adee, John
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210741, 210746, 210 961, 210103, 210138, 210224, 210806, B01D 2512
Patent
active
044393253
ABSTRACT:
A method and apparatus for controlling the operation of a primary filter press to insure the attainment of a desired quality cake in the press including a conduit for feeding a slurry or composition to the filter press, transducers responsive to the volume of slurry delivered to the filter press, the rate of flow, the pressure at the inlet to the press and the characteristics of the slurry solids for producing electric signals proportional thereto, relating at least certain of the signals to compute a quantity K indicative of the quality of the cake being formed in the press when the pressure to the filter press attains 90% of the terminal pressure and modifying the characteristics of the slurry to achieve the desired volume of K. The invention further comprehends the use of a pilot filter press of significantly smaller size than the primary press and fed by the same slurry and operated in the same manner. Since 90% of the terminal pressure in the pilot filter can be achieved in a very short time as compared with the primary press, the quantity K can be computed and adjusted long prior to the attainment of 90% of the terminal pressure in the primary filter press.
REFERENCES:
patent: 3907681 (1975-09-01), Corrigan et al.
patent: 4187175 (1980-02-01), Roberts et al.
patent: 4226714 (1980-10-01), Forness et al.
patent: 4370232 (1983-01-01), Busse et al.
Adee John
CPC Engineering Corporation
Geoffrey, Jr. Eugene E.
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