Filter device and method for operating a filter device

Patent metadata

Field	Value
Publication number	US-9649580-B2
Application number	US-201214433748-A
Country	US
Kind code	B2
Filing date	Oct 12, 2012
Priority date	Oct 12, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

The invention suggests a filter device having a stationary head piece and a movable end piece, a pack of at least a recess plate and an adjacent recess plate between the head piece and the end piece, the recess plate and/or the adjacent recess plate having a recess, that forms a filter chamber between the recess plate and the adjacent recess plate, a first filter cloth and a second filter cloth between the recess plate and the adjacent recess plate for retaining as a filter cake a solid content of a suspension, and allowing a remaining liquid fraction of the suspension to pass as a filtrate, and a suspension pipe running through the pack between the head piece and the end piece for charging the suspension through the filling shoe between the first filter cloth and the second filter cloth into the filter chamber, and a filling shoe comprising an outlet section for the suspension, clamping the first filter cloth to the recess plate during filtering operation of the filter device, an anchoring section for anchoring the filling shoe in an anchoring position to the recess plate, and a pivot section between the outlet section and the anchoring section, that tiltably connects the outlet section to the anchoring section. The invention further suggests a method for operating such filter device.

First claim

The invention claimed is:

1. A filter device having a stationary head piece and a movable end piece, a pack of at least a recess plate and an adjacent recess plate between the head piece and the end piece, the recess plate and/or the adjacent recess plate having a recess, that forms a filter chamber between the recess plate and the adjacent recess plate, a first filter cloth and a second filter cloth between the recess plate and the adjacent recess plate for retaining as a filter cake a solid content of a suspension, and allowing a remaining liquid fraction of the suspension to pass as a filtrate, and a suspension pipe running through the pack between the head piece and the end piece for charging the suspension through a filling shoe between the first filter cloth and the second filter cloth into the filter chamber, and the filling shoe comprising
a. an outlet section for the suspension, clamping the first filter cloth to the recess plate during filtering operation of the filter device,
b. an anchoring section for anchoring the filling shoe in an anchoring position to the recess plate, and
c. a pivot section between the outlet section and the anchoring section, that tiltably connects the outlet section to the anchoring section;

wherein the pivot section is elastic and wherein the pivot section has a spring element.

2. A filter device according to claim 1 , wherein the spring element is made of fiber reinforced plastic.

3. A filter device according to claim 1 wherein a profile of the pivot section is straight during filtering operation of the filter device and curved in a relaxed state.

4. A filter device according to claim 1 , wherein the filling shoe is made of an elastomer.

5. A filter device according to claim 4 , having a stabilizing element, that decreases elasticity of at least the outlet section.

Assignees

• Outotec Finland Oy

Inventors

• Böhnke Bernd

Classifications

• B01D25/215

  Construction of the filter plates, frames · CPC title

• B01D25/12

  Filter presses, i.e. of the plate or plate and frame type · CPC title

• B01D29/56

  in series connection · CPC title

• B01D25/302 Primary

  specially adapted for chamber filter presses · CPC title