Device for slurrying a suspension and method for operating a device

Patent metadata

Field	Value
Publication number	US-10940488-B2
Application number	US-201816221350-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Dec 14, 2017
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

A method and device for slurrying a suspension, the device including a mixing container with an inlet opening configured to introduce the suspension into the mixing container, a distributor element having a collecting container and an outlet arm fastened to the collecting container, and a shaft with a longitudinal axis, with the shaft and the distributor element arranged inside the mixing container, and the distributor element rotatable around the shaft. The collecting container has a collecting opening that permits passage of the suspension from the inlet opening into the distributor element, the outlet arm has an outflow opening that lets the suspension leave the distributor element, and the outlet arm permitting the suspension to flow out of the distributor element, with a flow of the suspension causing a torque on the distributor element so that the torque supports a rotation around the shaft.

First claim

What is claimed is:

1. A device for slurrying a suspension comprising:
a mixing container with an inlet opening configured to introduce the suspension into the mixing container;
a distributor element having a collecting container and an outlet arm fastened to the collecting container; and
a shaft with a longitudinal axis,
wherein the shaft and the distributor element are arranged inside the mixing container,
wherein the distributor element is mounted so as to be freely rotatable around the shaft,
wherein the collecting container comprises a collecting opening configured to pass the suspension from the inlet opening into the distributor element,
wherein the outlet arm comprises an outflow opening configured to let the suspension leave the distributor element,
wherein the outlet arm is designed such that the suspension is able to flow out of the distributor element starting from the collecting container via the outlet arm and the outflow opening, a flow of the suspension causing a torque on the distributor element so that the torque supports a rotation around the shaft;
wherein the longitudinal axis of the shaft is oriented substantially parallel to a gravitational direction;
wherein the collecting opening is arranged downstream of the inlet opening in the gravitational direction;
wherein, with respect to a viewing direction along the longitudinal axis of the shaft, the collecting opening completely covers the inlet opening;
wherein the mixing container is configured to be filled with the suspension; and
wherein the distributor element is designed such that when the mixing container is at least partially filled with the suspension the distributor element floats in the suspension.

2. The device according to claim 1 , wherein the distributor element is designed such that when the distributor element floats in the suspension the outflow opening is completely submerged in the suspension.

3. The device according to claim 1 , wherein the inlet opening is offset with respect to the shaft in a direction perpendicular to the longitudinal axis of the shaft.

4. The device according to claim 1 , wherein an interior of the outlet arm is connected via an inflow opening in an outer wall of the collecting container to an interior of the collecting container so that the suspension is able to pass from the interior of the collecting container via the inflow opening into the interior of the outlet arm when the distributor element rotates around the shaft, and wherein at least one position exists in which the inflow opening at least partially covers the inlet opening.

5. The device according to claim 1 , wherein the collecting container has a geometric shape of a hollow dome.

6. The device according to claim 1 ,
wherein the mixing container has an outlet opening configured to remove the suspension from the mixing container, and
wherein the outlet opening is offset with respect to the inlet opening in a direction perpendicular to the longitudinal axis of the shaft.

7. The device according to claim 6 , further comprising a return system configured to convey at least a portion of a suspension removed from the outlet opening back into the mixing container via the inlet opening.

8. The device according to claim 1 ,
wherein the mixing container has a side wall which is spaced from the shaft in a direction perpendicular to the longitudinal axis of the shaft, and
wherein a distance of the outflow opening to the shaft is between 50% and 75% inclusive of a distance of the side wall to the shaft.

9. The device according to claim 1 ,
wherein the distributor element has a passage through which the shaft is guided, and
wherein a diameter of the passage is at least 100 μm larger than a diameter of the shaft so that a gap exists between the distributor element and the shaft.

10. The device according to claim 1 , wherein the distributor element is mounted so as to be freely displaceable along the longitudinal axis of the shaft.

11. A method for operating a device having a mixing container with an inlet opening configured to introduce a suspension into the mixing container, further having a distributor element having a collecting container and an outlet arm fastened to the collecting container, and further having a shaft with a longitudinal axis, the method comprising:
orientating the device such that the longitudinal axis of the shaft is aligned substantially parallel to a gravitational direction and the distributor element is arranged downstream of the inlet opening in the gravitational direction, wherein the shaft and the distributor element are arranged inside the mixing container, wherein the distributor element is mounted so as to be freely rotatable around the shaft wherein the collecting container comprises a collecting opening configured to pass the suspension from the inlet opening into the distributor element, wherein the outlet arm comprises an outflow opening configured to let the suspension leave the distributor element, and wherein the outlet arm is designed such that the suspension is able to flow out of the distributor element starting from the collecting container via the outlet arm and the outflow opening, a flow of the suspension causing a torque on the distributor element so that the torque supports a rotation around the shaft;
introducing the suspension with converter particles into the mixing container via the inlet opening so that the suspension first passes via the collecting opening into the distributor element and then flows out of the distributor element via the outflow opening as a result of which the distributor element is set in rotation around the shaft;
wherein the mixing container is at least temporarily partially filled with the suspension; and
wherein the distributor element floats at least temporarily in the suspension.

12. The method according to claim 11 ,
wherein a filling level of the suspension in the mixing container changes, and
wherein the distributor element follows a change in filling level by moving along the longitudinal axis of the shaft.

13. The method according to claim 11 ,
wherein the suspension has a density between 0.5 g/cm3 and 2 g/cm3 inclusive,
wherein the suspension has a viscosity between 1 mPa·s and 100 mPa·s inclusive, and
wherein the suspension passes the inlet opening at an average velocity between 0.01 m/s and 5 m/s inclusive.

14. The method according to claim 11 , further comprising:
removing the suspension from the mixing container; and
spraying at least a part of the removed suspension onto semiconductor components.

15. A device for slurrying a suspension comprising:
a mixing container with an inlet opening configured to introduce the suspension into the mixing container;
a distributor element having a collecting container and an outlet arm fastened to the collecting container; and
a shaft with a longitudinal axis, wherein the shaft and the distributor element are arranged inside the mixing container;
wherein the inlet opening is offset with respect to the shaft in a direction perpendicular to the longitudinal axis of the shaft;
wherein the distributor element is mounted so as to be freely rotatable around the shaft;
wherein the collecting container comprises a collecting opening configured to pass the suspension from the inlet opening into the distributor element;
wherein the outlet arm comprises an outflow opening configured to let the suspension leave the distributor element; and
wherein the outlet arm is designed such that the suspension is able to flow out of the distributor element starting from the collecting container via the outl

Assignees

• Osram Opto Semiconductors Gmbh
• Osram Oled Gmbh

Inventors

• Dimmelmeier Harald
• Barthel Stefan
• Jerebic Simon
• Beer Benedikt
• Laux Harald

Classifications

• B01F27/811

  with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump · CPC title

• B01F27/55

  with stirrers driven by the moving material · CPC title

• B01F27/15

  Stirrers with tubes for guiding the material · CPC title

• B01F27/09

  characterised by the mounting of the stirrers with respect to the receptacle · CPC title

• B01F27/2312

  the position of the rotating shaft being adjustable in the interior of the receptacle, e.g. to locate the stirrer in different locations during the mixing · CPC title