Method of and an apparatus for controlling the quantity of filte

Details Method of and an apparatus for controlling the quantity of filte Method of and an apparatus for controlling the quantity of filte

1977-07-13

1978-10-03

Ruggiero, Joseph F.

Boots, shoes, and leggings

210193, 364109, G06G 758, B01D 3702

Patent

active

041187784

ABSTRACT:
A method of and an apparatus for controlling the quantity of filter aid fed to a settling filter in a given unit of time during filtration. The pressure drop across the filter is determined and used to provide a first control magnitude, the quantity of liquid flowing through the filter per unit of time is determined and used to give a second magnitude, and the ratio of the first to the second magnitudes is determined as a third control magnitude, the quantity of filter aid delivered to the liquid feed to the filter is adjusted in proportion to such third control magnitude. Various ways of relating each control magnitude to its control variable are disclosed.

REFERENCES:
patent: 3348685 (1967-10-01), Miller
patent: 3399133 (1968-08-01), Gerdes et al.
patent: 3551330 (1970-12-01), Jernqvist et al.
patent: 3605775 (1971-09-01), Zaander et al.
patent: 3693797 (1972-09-01), Topol
patent: 3725263 (1973-04-01), Harris et al.

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