Apparatus for backwashing filter

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 46/42 (2006.01) C10J 3/54 (2006.01) C10K 1/02 (2006.01) F02C 3/28 (2006.01)

Patent

CA 2729941

The reliability of backwashing valves constituted of first backwashing valves and second backwashing valves is ensured. A first backwashing valve (backwashing-gas rear valve) (7) that controls gas for backwashing and a second backwashing valve (backwashing-gas front valve) (6) that operates at slower speed than the first backwashing valve (7) are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks.

L'invention permet d'assurer la fiabilité d'une vanne de lavage à contre-courant constituée d'une première vanne de lavage à contre-courant et d'une deuxième vanne de lavage à contre-courant. Deux premières vannes de lavage à contre-courant, ou plus (vannes arrière de gaz de lavage à contre-courant) (7) pour commander le gaz de lavage à contre-courant, et des deuxièmes vannes de lavage à contre-courant (vannes avant de gaz de lavage à contre-courant (6) qui fonctionnent à une vitesse inférieure à celle à laquelle les premières vannes de lavage à contre-courant (7) fonctionnent) sont disposées en série sur un tuyau d'introduction de gaz de lavage à contre-courant qui est prévu dans chaque bloc de filtre.

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