Filter press with adaptive automated control arrangement

Details Filter press with adaptive automated control arrangement Filter press with adaptive automated control arrangement

1992-06-08

1994-01-04

Drodge, Joseph W.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

100 45, 210143, 210224, 2104161, 364558, 417 12, 417 38, B01D 3704

Patent

active

052757404

ABSTRACT:
A method for controlling the filling of a filter press with slurry according to a preferred embodiment of the present invention includes the sequentially executed steps of: gradually increasing the pressure of the slurry supplied to thee press until the slurry pressure reaches an upper pressure limit; recording a trigger point in time at which the slurry pressure reaches the upper pressure limit; and determining whether the slurry pressure subsequently falls below a lower pressure limit within a predetermined period of time commencing at the trigger point. If the slurry pressure does fall below the lower pressure limit within the predetermined period of time, then the above-listed sequence of steps is repeated until the slurry pressure fails to fall below the lower pressure limit within the predetermined period of time, thereby indicating that the press is full and terminating the process.

REFERENCES:
patent: 3789367 (1974-01-01), Dumstorff et al.
patent: 4151080 (1979-04-01), Zuckerman et al.
patent: 4944870 (1990-07-01), Yagishita et al.
patent: 5161954 (1992-11-01), Matheson et al.
patent: 5167832 (1992-12-01), Carlsson et al.
patent: 5215007 (1993-06-01), Sebright et al.
JWI "J-Press Liquid/Solids Filtration and Separation Equipment", JWI, Inc., Sep. 1989, (15 pages).
JWI "Automatic Pump Control System", JWI, Inc., Nov. 1983, (11 pages).
JWI "J-Press Liquids--Solids Filtration and Separation Equipment", JWI, Inc., Jun. 1987, (16 pages).
Collection of documents of Gorman-Rupp, Mar. 30, 1992, (40 pages).

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