Dispersing device, a dispersing system, and a process for dispersing

Patent metadata

Field	Value
Publication number	US-10201789-B2
Application number	US-201415106104-A
Country	US
Kind code	B2
Filing date	Aug 12, 2014
Priority date	Dec 27, 2013
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

To provide a dispersing device that carries out an appropriate dispersion having a good yield, processing within an appropriate temperature range, and having a high power to disperse. The dispersing device disperses a mixture that is slurry or a liquid by causing the mixture to flow between a rotor and a stator toward the outer circumference by centrifugal force. It comprises a container, a cover assembly that closes an upper opening of the container, a stator that is fixed under the cover assembly, a rotor that is disposed to face the lower surface of the stator, a rotary shaft that rotates the rotor, a bearing that is located above the stator, and a spacer that is detachably disposed between the rotary shaft and the rotor to adjust a gap between the rotor and the stator.

First claim

The invention claimed is:

1. A shear-type dispersing device for dispersing a mixture of a slurry or a liquid by causing the mixture to flow by centrifugal force toward an outer circumference between a rotor, and a stator that is disposed to face the rotor, comprising:
a container for receiving the dispersed mixture;
a cover assembly that closes an upper opening of the container;
a stator that is fixed under the cover assembly;
a rotor that is disposed to face a lower surface of the stator;
a rotary shaft that rotates the rotor;
a bearing that is disposed in the cover assembly and is located above the stator to rotatably hold the rotary shaft; and
a spacer that is detachably disposed between the rotary shaft and the rotor to adjust a gap between the rotor and the stator;
wherein when the spacer is disposed an axial position of the rotor in relation to the stator is fixed,
wherein the cover assembly has a part for holding the bearing and a part for holding the stator that is disposed under the part for holding the bearing,
wherein the part for holding the bearing has a part for controlling an axial position that controls the axial position of the part for holding the stator by abutting the part for holding the stator by means of a second spacer,
wherein the second spacer is detachably disposed between the part for holding the bearing and the part for holding the stator to adjust the axial position of the stator in relation to the part for holding the bearing by being replaced by another second spacer that has a different axial length,
wherein a concave part is formed on an upper surface of the rotor so that a lower end, of the rotary shaft is inserted thereto,
wherein a through-hole opens on the concave part,
wherein the lower end of the rotary shaft is inserted into the concave part of the rotor so that a fastening member is fixed from a lower side of the rotor while the lower end abuts the concave part across the spacer,
wherein the fastening member fastens the rotary shaft to the rotor across the spacer by fixing a part thereof to the rotary shaft through the through-hole in the rotor,
wherein pins are inserted into the concave part of the rotor and the lower end of the rotary shaft to transmit a rotational power of the rotary shaft to the rotor, the pins being disposed at uniform intervals along a circumferential direction, and
wherein a first through-hole through which the fastening member passes and second through-holes through which the pins pass are formed in the spacer.

2. The dispersing device of claim 1 , wherein the stator is bigger than the rotor on a plane where the stator faces the rotor,
wherein in the stator a groove for cooling is formed on a surface opposite the surface that faces the rotor, and
wherein the groove for cooling is formed beyond an outer edge of the rotor.

3. The dispersing device of claim 2 , wherein a wall is formed along a radial direction on the groove for cooling,
wherein a port for supplying coolant and a port for discharging the coolant are disposed across the wall, and
wherein the coolant that is supplied from the port for supplying the coolant flows toward a direction in which no wall is formed near the port for supplying the coolant, in the circumferential direction, the coolant being discharged from the port for discharging the coolant.

4. The dispersing device of claim 2 , wherein in the stator a hole for inserting the rotary shaft is formed, and
wherein the mixture is supplied from outside the hole for inserting the rotary shaft to the gap between the stator and the rotor.

5. The dispersing device of claim 4 , wherein in the stator a through-hole for supplying the mixture is formed outside the hole for inserting the rotary shaft,
wherein in the part for holding the stator a port for supplying the mixture, and a passage that communicates with the port for supplying the mixture to the through-hole for supplying the mixture in the stator, are provided, and
wherein the mixture that is supplied from the port for supplying the mixture is introduced to the gap between the stator and the rotor through the passage in the part for holding the stator and the through-hole in the stator.

6. The dispersing device of claim 5 , wherein a second hole for inserting the rotary shaft is formed in the part for holding the stator,
wherein a labyrinth seal is provided to the second hole for inserting the rotary shaft, and
wherein air is supplied from outside the part for holding the stator to a space that is located within the part for holding the stator and connected to an upper part of the second hole for inserting the rotary shaft.

7. The dispersing device of claim 6 , wherein a cooling mechanism is provided to the container.

8. The dispersing device of claim 7 , wherein the container has a conical wall that is shaped as a cone that has a smaller cross section from a top to a bottom,
wherein a port for discharging the mixture that has been dispersed is provided at a lower end of the container, and
wherein the container is equipped with an agitator that scrapes a slurry mixture that adheres to the wall of the container.

9. The dispersing device of claim 8 , wherein the stator and the rotor are made of stainless steel on which a ceramic is thermal sprayed.

10. The dispersing device of claim 2 , wherein the container doubles as a tank for storing the mixture after being dispersed.

11. A dispersing system comprising:
the dispersing device of claim 1 ;
a tank for storing a mixture before a process that stores the mixture to be supplied to the dispersing device;
a tank for storing a mixture after the process that stores the mixture that has been processed by the dispersing device;
a first piping that connects the dispersing device with the tank for storing the mixture before the process; and
a second piping that connects the dispersing device with the tank for storing the mixture after the process;
wherein the mixture that has been stored in the tank for storing the mixture before the process is processed by the dispersing device, and the mixture that has been processed is supplied to the tank for storing the mixture after the process.

12. The dispersing system of claim 11 , wherein a compressor is connected to the tank for storing the mixture before the process via a flow control valve,
wherein a pressure applied by the compressor and the flow control valve on the mixture in the tank for storing the mixture before the process causes the mixture to flow from the tank for storing the mixture before the process to the dispersing device through the first piping.

13. A dispersing system comprising:
the dispersing device of claim 1 ;
first and second tanks, each of which can store the mixture to be supplied to the dispersing device and the mixture that has been dispersed by the dispersing device;
a first piping in which a piping for the mixture from the first tank and a piping for the mixture from the second tank join to supply the mixture to the dispersing device and to which a first selector valve is provided at a point where the piping joins; and
a second piping in which a piping for the mixture from the dispersing device branches to supply the mixture to the first and second tanks and to which a second selector valve is provided at a point where the piping branches;
wherein the first and second selector valves are switched so that the mixture is supplied from either of the first and second tanks through the first piping to the dispersing device to be dispersed, and so that the mixture after being dispersed is supplied to the other tank, and
wherein the mixture is dispersed multiple

Assignees

• Sintokogio Ltd

Inventors

• Ishida Yuu
• Hagata Yutaka

Classifications

• B01F7/18

  Operations & Transport · mapped topic

• B01F7/24

  Operations & Transport · mapped topic

• B01F7/162

  Operations & Transport · mapped topic

• B01F15/068

  Operations & Transport · mapped topic

• B01F2015/061

  Operations & Transport · mapped topic