A cleaning process for cleaning filtration material of a gas...

B - Operations – Transporting – 01 – D

Patent

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B01D 46/04 (2006.01)

Patent

CA 2625745

A cleaning process for filtration material of gas filter comprises four steps: The first step blocks the gas flow to pass through the filtration material by closing the clean gas side for a single or a row of filter segments. The second step provides a slow gas flow to the closed filter segment/segments to cause a reverse gas flow through the filtration material. The third step is to open the impulse valve such as diaphragm valve for an ultra short time to create a compressed gas impulse to loosen the particles that didn't fall off the filtration material during the second step of cleaning. The fourth step shuts off the reverse flow gas supply. By covering the nozzle pipe (7) with the slide plate, lid or cap (6), which is near the filter segment, or connecting them to the nozzle pipe (8), single filter segment (4) or row of filter segments (5) can be separated from the filter operation.

La présente invention a trait à un procédé de nettoyage pour matériau de filtration de filtre à gaz comprenant quatre étapes. La première étape assure l'interruption de l'écoulement de gaz à travers le matériau de filtration par la fermeture du côté du gaz propre pour un unique segment ou une rangée de segments de filtre. La deuxième étape assure un écoulement lent de gaz vers le(s) segment(s) de filtre fermé(s) pour entraîner un écoulement inverse de gaz à travers le matériau de filtration. La troisième étape assure l'ouverture de la soupape d'impulsions pour détacher les particules qui ne se sont pas détachées du matériau de filtration lors de la deuxième étape de nettoyage. La quatrième étape interrompt la fourniture de l'écoulement inverse de gaz. Grâce au recouvrement de la conduite de la buse (7) à l'aide d'une plaque, d'un couvercle ou bouchon à coulissement (6), se trouvant à proximité du segment de filtre, ou leur raccordement à la conduite de la buse (8), il est possible de séparer un unique segment de filtre (4) ou une rangée de segments de filtre (5) du fonctionnement du filtre.

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