Gravity screen with burden removal and pore-cleaning means

Details Gravity screen with burden removal and pore-cleaning means Gravity screen with burden removal and pore-cleaning means

B - Operations, Transporting

01

D

B01D 37/00 (2006.01) B01D 29/01 (2006.01)

Patent

CA 2277087

A burden removal system for removing solid burden from a stream of water. A screen (35) has an upper (36) and a lower surface (37) with pores (38) extending between them. The upper surface (36) is substantially horizontal. A drive bar (47) with a wiper blade (46) is cyclically bi-directionally driven with the blade (46) pushing burden along the upper surface (36) in one direction and rising above the burden in the opposite direction. Jet sprays (49) discharge water against the lower surface (37), preferably just ahead of the wiper blade (46) to assist the blade (46) in moving the burden and cleaning the pores (38).

L'invention porte sur un système d'élimination de la charge de solides présente dans un courant d'eau. Un filtre (35) comporte une surface supérieure (36) et une surface inférieure (37) et des pores (38) s'étendant entre elles. La surface supérieure (36) est sensiblement horizontale. Une barre d'entraînement (47) munie d'une lame racleuse (46) se déplace cycliquement selon un mouvement alternatif avec la lame (46) en poussant la charge le long de la surface supérieure (36) dans un sens, et en passant au-dessus de la charge dans le sens opposé. Des jets (49) projettent de l'eau sur la surface inférieure (37) de préférence juste en avant de la lame racleuse (46) pour aider la lame (46) à déplacer la charge, et nettoyer les pores.

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