Filter press flow control system for dewatering sludge

Details Filter press flow control system for dewatering sludge Filter press flow control system for dewatering sludge

1985-10-03

1987-01-27

Adee, John

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Proportionate feed means

210102, 210104, 210138, 210224, B01D 2512

Patent

active

046393129

ABSTRACT:
A control system has been invented for feeding settled sludge to two filter presses without the use of a surge tank. The system provides for constant feed rates from a solids settling tank, even as filter press capacity decays and the filter press is taken off stream for dumping. This is accomplished by providing two modes of operation. The first mode provides for the feeding of a single filter press. The second mode provides control when both filter presses are fed. The second mode is actuated by elevated pressure differential across a filter press, which signals the valve to move, to bring a second filter press on line while compensating for flow rate and finally shuts down the first filter press after a timed interval.
The need for a surge drum is eliminated by maintaining continuous upstream and downstream operation of the filter presses in a sludge dewatering process.

REFERENCES:
patent: 3549521 (1970-12-01), Stevens
patent: 4067807 (1978-01-01), Busse et al.
patent: 4439325 (1984-03-01), Blais
patent: 4514306 (1985-04-01), Pato

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