US 2023/0201747 A1Published application

Rotary filter and associated filtering method

AssigneeGaudfrin

InventorsAdrien DAGALLIER, Simon ILLOUZ, Romain GALLAIS

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Abstract

The invention proposes a rotary filter intended for liquid/solid separation of a suspension, comprising a trough, a spraying device, and at least one disk which is non-rotatably connected to a main shaft, characterized in that: each disk comprises a first series of at least one filter sector which is separated from a second series of at least one filter sector by means of two non-filtering zones, the main shaft comprises a first pipe which communicates with the first series of at least one filter sector of each disk, and a second pipe which communicates with the second series of at least one filter sector of each disk, said rotary filter comprises comb teeth. The invention also proposes a filtration method.

Claims21

Dependent claims

Rotary filter intended for liquid/solid separation of a suspension, comprising a trough containing the suspension, a device for spraying disengagement fluid, and at least one disk which is non-rotatably connected to a main shaft, each disk being partially immersed in the suspension and each disk comprising a plurality of filter sectors, each filter sector comprising a structural element that is covered by a filter medium, and a duct for connection of said filter sector to a pipe arranged along the main shaft, characterized in that:

each disk comprises a first series of at least one filter sector which is separated from a second series of at least one filter sector by means of two non-filtering zones,
the main shaft comprises a first pipe which communicates with the first series of at least one filter sector of each disk, and a second pipe which communicates with the second series of at least one filter sector of each disk,
said rotary filter comprises comb teeth which are arranged above the level of the suspension, on either side of each disk,
the main shaft is intended to occupy at least:
a first angular position in which the first series of at least one filter sector of each disk is located under the comb teeth, soaking in the suspension to be filtered, and in which the second series of at least one filter sector of each disk is located above the comb teeth, each non-filtering zone being adjacent to one comb tooth on each of the faces thereof,
a second angular position in which the second series of at least one filter sector of each disk is located under the comb teeth, soaking in the suspension to be filtered, and in which the first series of at least one filter sector of each disk is located above the comb teeth, each non-filtering zone being adjacent to one comb tooth on each of the faces thereof, so as to allow for the disengagement of the series of at least one filter sector of each disk located above the comb teeth while the filtration of the suspension continues on the other series of at least one filter sector of each disk located below the comb teeth.

3 more elements

Filtration method for liquid/solid separation of a suspension by means of a rotary filter comprising a trough containing the suspension, a device for spraying disengagement fluid, and at least one disk which is non-rotatably connected to a main shaft, each disk being partially immersed in the suspension and each disk comprising a plurality of filter sectors, each filter sector comprising a structural element that is covered by a filter medium, and a duct for connection thereof to a pipe arranged along the main shaft, the method comprising the following operations:

a) filtration of the suspension on each disk by means of a first or a second series of at least one filter sector,
b) disengagement, on each disk, of a first or a second series of at least one filter sector by spraying with a disengagement fluid,
the method being characterized in that it comprises a nominal operation cycle during which:
the operation of filtration of the first series of at least one filter sector of each disk is carried out simultaneously with the operation of disengagement of the second series of at least one filter sector of each disk, the main shaft being controlled into a first angular position where the first series of at least one filter sector of each disk soaks in the suspension and where the second series of at least one filter sector of each disk is arranged above the suspension, and
the operation of filtration of the second series of at least one filter sector of each disk is carried out simultaneously with the operation of disengagement of the first series of at least one filter sector of each disk, the main shaft being controlled into a second angular position where the second series of at least one filter sector of each disk soaks in the suspension and where the first series of at least one filter sector of each disk is arranged above the suspension.

2 more elements

Dependencies are inferred from the claim text.