Apparatus and method for treating slurries

Patent metadata

Field	Value
Publication number	US-10227248-B2
Application number	US-201614997646-A
Country	US
Kind code	B2
Filing date	Jan 18, 2016
Priority date	Jun 15, 2010
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

An apparatus for treating slurries, in particular biogenic or industrial slurries, can include at least one treatment rotor which is arranged or can be arranged in the slurry and which rotates or is rotatable about an axis of rotation (R), with treatment elements which project outward, as seen from the axis of rotation (R), and between which interspaces are formed, at least some of the treatment elements having, at—at least one, preferably each—adjacent interspace, in each case at least one treatment edge, preferably at least two treatment edges spaced apart from one another, each of these treatment edges running from the inside outward, as seen from the axis of rotation. Methods for treating slurries are also disclosed, including methods using the apparatus for treating slurries.

First claim

The invention claimed is:

1. A method for mixing a conditioning agent into a slurry, the method comprising the steps of:
placing a treatment rotor rotatable about an axis of rotation into the slurry, the treatment rotor having first and second treatment elements projecting outward from the axis of rotation, the first and second treatment elements defining an interspace between the first and second treatment elements;
introducing the conditioning agent from the treatment rotor into the slurry;
rotating the treatment rotor about the axis of rotation; and
directing the slurry and the conditioning agent into the interspace via the rotation of the treatment rotor, wherein the slurry and the conditioning agent are first directed along a first region of the interspace increasing in width and subsequently directed along a second region of the interspace decreasing in width, the width of the interspace measured in a direction parallel to the axis of rotation, and wherein directing the slurry and the conditioning agent along the first region and then the second region intensifies mixing of the conditioning agent into the slurry.

2. The method of claim 1 , further comprising separating a liquid from solids in the slurry, including solid fractions of cells of organic origin contained in the slurry, subsequent to the introduction of the conditioning agent.

3. The method of claim 1 , further comprising forming flaky structures of differing sizes from solids in the slurry subsequent to the introduction of the conditioning agent.

4. The method of claim 1 , further comprising releasing solid cellular constituents of the slurry subsequent to the introduction of the conditioning agent.

5. The method of claim 1 , wherein directing the slurry and the conditioning agent into the interspace while the treatment rotor is rotated comprises directing the slurry and the conditioning agent into the interspace having a ratio of a maximum width to a minimum width between 1.5 and 2.8.

6. The method of claim 1 , wherein the conditioning agent is introduced from the treatment rotor into the slurry at a slot defined by a body of the treatment rotor at a location outside of the interspace.

7. The method of claim 1 , further comprising disintegrating the slurry by rotating the treatment rotor about the axis of rotation prior to introduction of the conditioning agent.

8. A method for treating a slurry using an apparatus, the method comprising the steps of:
placing a treatment rotor of the apparatus into the slurry, wherein the treatment rotor is rotatable about an axis of rotation, and wherein placing the treatment rotor into the slurry comprises placing into the slurry first and second treatment elements projecting outward from the axis of rotation, the first and second treatment elements defining an interspace therebetween;
rotating the treatment rotor about the axis of rotation;
decompressing the slurry within the interspace via the rotation of the treatment rotor about the axis of rotation; and
compressing the slurry within the interspace via the rotation of the treatment rotor about the axis of rotation, the compressing being subsequent to the decompressing wherein decompressing the slurry within the interspace occurs along a first location within the interspace where a width of the interspace, measured in a direction parallel to the axis of rotation, increases in a direction of rotation about the axis of rotation and the compressing the slurry within the interspace occurs along a second location within the interspace where a width of the interspace, measured in the direction parallel to the axis of rotation, decreases in the direction of rotation about the axis of rotation.

9. The method of claim 8 , further comprising the step of:
introducing a conditioning agent into the slurry.

10. The method of claim 9 , wherein the conditioning agent is introduced into the slurry from an axial slot defined by a body of the treatment rotor on which the first and second treatment elements are formed, the axial slot running substantially parallel to the axis of rotation along at least a portion of the body.

11. The method of claim 10 , wherein the axial slot is defined by the body at a location between first and second rows of treatment elements.

12. The method of claim 9 , further comprising the step of:
separating a liquid from solids in the slurry subsequent to introducing the conditioning agent into the slurry.

13. The method of claim 8 , wherein the first and second treatment elements define the interspace to be of a convexly curved form.

14. The method of claim 8 , wherein placing into the slurry the first and second treatment elements comprises placing a first row of treatment elements including the first and second treatment elements into the slurry and placing a second row of treatment elements into the slurry, the first and second rows offset from one another by approximately 180 degrees relative to the axis of rotation.

15. The method claim 14 , wherein the treatment elements of each of the first and second rows are aligned along a common axis running parallel to the axis of rotation.

16. The method of claim 8 , wherein rotating the treatment rotor about the axis of rotation comprises coupling the treatment rotor to a rotary device via a coupling element to rotate the treatment rotor about the axis of rotation.

Assignees

• Ecolab Usa Inc

Inventors

• Knauer Jochen Friedrich

Classifications

• C02F2303/26

  Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles · CPC title

• C02F11/14 Primary

  with addition of chemical agents · CPC title

• B01D37/03

  using flocculating agents · CPC title

• B01F7/00125

  Operations & Transport · mapped topic

• B01F7/00291

  Operations & Transport · mapped topic