KR20150035497A - Slurry production apparatus and slurry production method - Google Patents

Abstract

Provided is a slurry producing apparatus which can prevent a stay when an additive in a light powder state is used and can shorten a dispersion time. A slurry producing apparatus (1) for producing a slurry by dispersing a mixture (5) of a slurry state or a liquid state treated raw material (3) and a powdery additive (4) while circulating, (12) for distributing the mixture to the tank, a pump (13) for circulating the mixture, and a circulation pump (13) for circulating the mixture. A pipe 14 for connecting the dispersion device, the tank and the pump in series, a powder supply device 15 for supplying the additive to the tank, and a treatment material supply device 16 for supplying the treatment material to the tank And the treatment material supply device supplies the treatment material so that the liquid level of the mixture does not occur in the tank when the additive is supplied from the powder supply device.

Description

Technical Field [0001] The present invention relates to a slurry production apparatus and a slurry production method,

The present invention relates to a slurry production apparatus and a slurry production method for producing a slurry by dispersing a substance in a mixture in which powdery state additives are added to a slurry state or a liquid state treatment raw material will be.

Conventionally, as a system for dispersing a slurry or a liquid mixture while circulating it, a system having a dispersing device, a tank, a pump, and a pipe has been used (see, for example, Japanese Patent Application Laid-Open No. 2011-36862).

In the above system, the tank was circulated in a state filled with a liquid raw material for processing, and the powdery additive was gradually added to the raw material in the tank to prepare a slurry. However, when the additive in the powder state is lighter than the raw material (the density is lower), there is a fear that the additive in the powder state stays on the liquid surface or the agitator in the tank and the dispersion time becomes longer.

Japanese Patent Laid-Open Publication No. 2011-36862

It is an object of the present invention to provide a slurry production apparatus and a slurry production method which can prevent the accumulation of additives when the additive in a light powder state is used and shorten the dispersion time.

The slurry producing apparatus according to the present invention is a slurry producing apparatus for producing a slurry by dispersing a mixture of a slurry state or a liquid state treated raw material and an additive in powder state while circulating the mixed raw material, A tank for supplying the additive to be mixed with the raw material to be treated, a dispersing device connected to the tank at an outlet side for dispersing the mixture, a pump for circulating the mixture, And a pump connected in series to the pump, a powder supply device for supplying the additive to the tank, and a treatment material supply device for supplying the treatment material to the tank, The device may be configured to supply the additive from the powder supply device There, it supplies the processed raw material so that the liquid level of the mixture occur in the tank.

A slurry producing method according to the present invention is a slurry producing method for producing a slurry by dispersing a mixture of a treatment raw material in a slurry state or a liquid state and an additive in a powder state while circulating the mixture, comprising a tank, a dispersing device, a pump, A first step of supplying the additive and a treatment material to be added to the treating raw material or mixture in the tank while circulating the treating raw material or the mixture in a pipe to be connected and dispersing the mixture; And a second step of circulating the mixture to the tank, the dispersing device, the pump, and the pipe after the completion of the step of supplying the treatment raw material to the mixture while dispersing the mixture at the same time, wherein in the first step, So that the liquid level of the mixture is not generated.

The present invention realizes the production of a slurry in which the retention of additives is prevented even when an additive in a light powder state is used, and the dispersion time is shortened.

This application is based on Japanese Patent Application No. 2012-164745 filed on July 25, 2012, the contents of which are incorporated herein by reference.

Further, the present invention will be more fully understood from the following detailed description. It should be understood, however, that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only. And various modifications and improvements will become apparent to those skilled in the art from the detailed description.

Applicants do not intend to disclose any of the described embodiments to the public, nor shall they be included within the scope of the claimed improvements or alternatives as part of the invention under the doctrine of equivalents.

In describing the present specification or claims, the use of a noun and the same directive should be construed to include both singular and plural unless specifically indicated otherwise, or unless the context clearly dictates otherwise. The use of any illustrative or exemplary language (e.g., " etc. ") provided herein is merely for the purpose of illustrating the present invention only and is not intended to limit the scope of the present invention There is no restriction.

FIG. 1 is a schematic diagram of a slurry producing apparatus according to an embodiment of the present invention, wherein (a) shows a state in which powdery additives in a manufacturing method using the apparatus are being fed, (b) Fig. 5 is a diagram showing a state after completion of supply of additives in a powder state in the above production method. Fig.

Hereinafter, a slurry production apparatus 1 to which the present invention is applied will be described with reference to the drawings. The apparatus 1 described below is an apparatus 1 for dispersing ("slurrying") a mixture 5 in which a powdery additive 4 is added to a slurry-form or liquid-state treating raw material 3, ). In addition, dispersion means to disperse the substance in the mixture 5, typically the additive (4), that is, to mix each substance in the mixture (5) uniformly.

1, the slurry production apparatus 1 includes a tank 11, a dispersion device 12, a pump 13, a pipe 14, a powder supply device 15, And a supply device 16. The slurry producing apparatus 1 may be referred to as a circulating dispersing system having the dispersing apparatus 12. The tank 11 is capable of supplying a powdery additive capable of storing the slurry-state or liquid-state treatment raw material or mixture and mixing the slurry or the liquid raw material with the treatment raw material.

In the dispersing device 12, the outlet side is connected to the tank 11 through the pipe 14, and the mixture is dispersed. The pump 13 circulates the mixture through the pipe 14 to the tank 11 and the disperser 12. The piping 14 connects the dispersing device 12, the tank 11, and the pump 13 in series.

The powder supply device 15 supplies the additive 4 to the tank 11. The treatment material supply device 16 supplies the treatment material 3 to the mixture circulated in the tank 11.

1 (a), the treatment material supply device 16 supplies the treatment material (for example, water) to the tank 11 so as to prevent the surface of the mixture 5 from being formed in the tank 11 when the additive is supplied from the powder supply device 15 3). Here, "no liquid surface" means that the discharge port 11a at the bottom of the tank 11 is filled with the raw material 3 or the mixture 5 so that the mixture 11 5) is circulating. That is, the " liquid level " means a liquid level substantially equal to the liquid level 5a of FIG. 1 (b) 3) "means that the mixture 5 is circulated to such a low circulating amount that the" horizontal liquid level "does not occur in the tank 11. Therefore, the apparatus 1 can prevent the additive in the powder state from staying in the liquid level of the mixture in the tank 11, and can shorten the time required for slurry production.

The powder supply device 15 supplies the additive 4 at a position where the mixture 5 from the dispersing device 12 flows in the bottom surface of the tank 11. [ As a result, the powdery additive 4 is led to the outlet 11a along the flow of the mixture 5, and is led to the dispersing device 12 through the pipe 14 and dispersed. The mixture dispersed in the dispersing device 12 is led to the tank 11.

After the supply of the additive from the powder supply device 15 is completed, the treatment material supply device 16 supplies the liquid 5a of the mixture 5 into the tank 11 as shown in Fig. 1 (b) Feed the raw material to be treated. In this way, the additive 4 in the powder state is already dispersed with the treatment material 3 or the mixture 5 and becomes in a state of not staying, It is possible to prevent the additive from staying, and a desired mixing ratio can be realized.

The treatment material supply device 16 includes a nozzle 16a and a treatment material storage tank 16b and a pump 16b for supplying the treatment material in the tank 16b from the nozzle 16a to the tank 11 16c. The pump 16c is installed on the path of the pipe 16d connecting the tank 16b and the nozzle 16a. The amount and timing of the processing material supplied from the processing material supply device 16 to the tank 11 by the pump 16c is controlled by the control unit 20. [

However, the length of the insertion portion into the tank 11 may be varied in the powder supply device 15. Specifically, the powder supply device 15 is provided with a vertical drive portion 15a. The powder supply device 15 can drive the nozzle 15b up and down by the up and down driving unit 15a. The powder supply device 15 is configured such that the length of the insertion portion of the nozzle 15b is shorter than the state shown in Figure 1 (a) (the first step) in the state as shown in Figure 1 (b) do. 1 (a), the additive is supplied to the bottom surface of the tank 11 at a position where the mixture flows from the dispersing device 12, without sprinkling the powder Supply. 1 (b), it is possible to prevent the tip of the nozzle 15b of the powder supply device 15 from being immersed in the liquid in the state of supplying the treated raw material after the supply of the additive in the powder state is completed have. If the tip of the nozzle 15b is immersed in the liquid, there is a problem that the mixture adheres to the nozzle 15b and that the powder adheres to the nozzle 15b at the next supply of the powder.

The powder supply device 15 also has a hopper 15c provided on the nozzle 15b for storing the powder additive. The hopper 15c may be moved up and down together with the nozzle 15b by the up and down driving unit 15a. The powder additive in the hopper 15c is supplied into the tank 11 at a predetermined speed by a screw feeder or the like in the nozzle 15b. The addition of the powder additive is not limited to the screw feeder, and for example, a vibration feeder may be used. In the case of using the vibration feeder, the required amount may be inputted into the hopper 15c. The amount and timing of the powder additive supplied from the powder supply device 15 to the tank 11 are controlled by the control unit 20. [ The position of the powder supply device 15 driven by the up-and-down driving unit 15a in the height direction is also controlled by the control unit 20. [

The slurry production apparatus 1 also includes an agitator 17 for agitating the mixture in the tank 11 in which the liquid level has appeared, after the addition of the additives is completed. The agitator 17 is provided with a motor 18 and a vertical drive portion 17a. In the agitator 17, the wing portion 17b can be driven up and down by the up-down driving portion 17a. The agitator 17 may cause the blade portion 17b to be retracted upward from the nozzle 15b in the powder additive supply state shown in Fig. 1 (a). It is possible to prevent the supply of the powder additive 4 from being disturbed. The agitator 17 has the wing portion 17b immersed in the liquid in the liquid feed state such as the liquid state shown in Fig. 1 (b) or the subsequent state, and exerts its stirring function. The position of the blade portion 17b driven by the up and down driving portion 17a in the height direction is controlled by the control portion 20. [ The agitator 17, specifically the motor 18, is controlled by the control unit 20. [

A pressure sensor (pressure gauge) 21 and a flow rate sensor (flow meter) 22 are provided in the pipe 14 of the slurry production apparatus 1. [ The pressure sensor 21 is installed, for example, in front of the dispersing device 12. The flow sensor 22 is installed, for example, on the outlet side of the pump 13. The detection results of the pressure sensor 21 and the flow rate sensor 22 are sent to the control unit 20.

The dispersing device 12 has a rotor 26 and a stator 27 which is an opposing member disposed to face the rotor 26. [ The mixture is dispersed by passing the mixture in the outer circumferential direction by centrifugal force between the rotor 26 and the stator 27. The mixture 5 after dispersion is returned to the tank 11 through the pipe 14 and the charging nozzle 12a. The dispersing device 12 is provided with an elevating mechanism 28 for adjusting the clearance between the rotor 26 and the stator 27. The lift mechanism 28 can adjust the size of the clearance by, for example, driving the rotor 26 up and down. Specifically, the number of rotations of the rotor 26 is controlled by the control unit 20. The size of the clearance by the elevating mechanism 28 is controlled by the control unit 20. [

For reference, the dispersing apparatus used in the apparatus 1 is not limited to the dispersing apparatus 12. For example, a rotor may be used instead of the stator. That is, it may be a dispersing device having a pair of rotors rotating in mutually opposite directions. In addition, a static mixer or the like may be used. Here, in the case of using the rotor type dispersing device such as the dispersing device 12, it is preferable because it assists the liquid feeding function of the pump 13. This is because the rotor type dispersing device such as the dispersing device 12 discharges the supplied mixture 5 outwardly by centrifugal force while dispersing it. As a result, the pressure in the piping of the supply source (supply source) is lowered, and this pressure reduction assists the liquid delivery function of the pump 13.

As described above, the slurry production apparatus 1 guides the powder additive 4 to the pump 13 together with the flow of the raw material 3 (mixture 5) 12), thereby producing a slurry. In addition, it is a device which uses the least processable raw material 3 that can be circulated until the addition of the powder additive 4 is completed, and the remaining processed raw material 3 is charged after completion of the addition. Specifically, the powder supply device 15 and the treatment material supply device 16, specifically the pump 16c, are controlled by the control unit 20 to supply the powder additive and the treatment material to the tank 11, So that the liquid level of the mixture is not generated in the powder 11, thereby realizing proper dispersion treatment in which the powder additive is prevented from staying.

For reference, as the concentration of the powder additive 4 increases, the viscosity of the slurry (mixture 5) increases, the amount of the slurry adhering to the interior of the apparatus increases, and the amount of slurry circulated by the pump 13 decreases. In this case, the treatment material 3 is added so that the outlet 11a of the tank 11 is not filled with the mixture 5. [ The same process is repeated until the supply of the powder additive 4 is completed. After the supply of the powder additive 4 is completely completed, the remaining whole amount of the predetermined treatment raw material 3 is supplied and the dispersion treatment is performed to produce the slurry.

Further, the slurry production apparatus 1 detects the amount of circulation in the powder supplying step shown in Fig. 1 (a), and when the amount is insufficient, the powder additive is added while adding the processing raw material. The control section 20 controls the treatment material supply device 16 and the powder supply device 15 based on the detection result of the flow sensor 22 so as to control the predetermined treatment material 3 and the powder additive 4, To the tank (11). For reference, it is also possible to adjust the feeding rate of the additional processing raw material 3 and the powder additive 4 in accordance with other information. As the above information, the pressure (the detection result of the pressure sensor 21) in the pipe 14 and the remaining amount of the mixture 5 in the tank 11 may be used in addition to the flow rate. The remaining amount of the mixture 5 in the tank 11 may be detected by installing a liquid level sensor using a laser or the like.

The slurry production method using the slurry production apparatus 1 constructed as described above will be described. In the slurry production method, a slurry is prepared by dispersing a mixture of a treatment raw material and an additive while circulating the mixture.

The method includes a first step, a second step, and a third step. In the first step, the slurry state or liquid state treatment raw material 3 is supplied to the tank 11, the dispersing device 12, the pump 13, and the pipe 14 connecting them in series, The additive 4 in powder form is fed to the raw material 3 or the mixture 5 in the tank 11 while circulating the raw material 3 or the mixture 5 and the mixture 5 is dispersed. If necessary, the raw material for treatment 3 may be further supplied. Fig. 1 (a) shows the first step.

In the second step, after the supply of the additive 4 is completed, the mixture 5 is circulated in the mixture 5 to the tank 11, the dispersing device 12, the pump 13 and the pipe 14 while circulating the mixture 5 And the mixture (5) is dispersed while supplying the raw material for treatment (3). Fig. 1 (b) shows the state of the second step.

In the third step, the mixture 5 is circulated in the tank 11, the dispersing device 12, the pump 13, and the pipe 14 after the supply of the raw material 3 in the second stage is completed, The mixture (5) is dispersed. For reference, the third stage also has a liquid level in the tank 11 as in Fig. 1 (b).

In the above-described first step, the liquid level of the mixture 5 is not generated in the tank 11. In addition, in the first step, the additive is supplied to the bottom surface of the tank 11 at a position where the mixture 5 from the dispersing device 12 flows.

In the first step, for example, each part (each part) is controlled by the control unit 20, and the following procedure is repeated. First, the pump 13 is started (S1-1). Next, the treatment material 3 is charged so that the discharge port 11a at the bottom of the tank 11 is filled with the treatment material 3 and collected in the tank 11 (S1-2). Next, the powder additive 4 is introduced (S1-3). The raw materials for treatment 3 and the additives 4 are dispersed in the dispersing device 12. Next, it is judged whether or not there is powder additive 4 in an unacceptable minute (S1-4). If there is a powder additive (4) for an unfavorable amount, the process returns to S1-2. If there is no added powder additive (4), the process proceeds to the second step. In the second step, the raw material for treatment 3 is added by an amount which is a predetermined concentration. That is, all the remaining amount of the treatment material 3 in a predetermined amount is supplied. When the introduction of the raw material for treatment 3 is completed, the process proceeds to the third step. For reference, when S1-2 to S1-4 described above are repeated, in S1-2, if the minimum circulating material is satisfied (if circulating to such an extent that the liquid surface does not exist) If the mixture circulated by the rise in viscosity is decreased, it is injected.

In the second step described above, the raw material 3 for treatment is supplied so that the liquid level 5a of the mixture 5 is generated in the tank 11. That is, the raw material 3 is fed until the mixture 5 is filled in the tank 11 by filling the discharge port 11a. In the second step, the length of the insertion portion of the powder supply device 15 is made shorter than that of the first step. In the second step, the wing portion 17b of the stirrer 17 is lowered. In the second and third steps, the mixture 5 is circulated and stirred with an agitator 17 to produce a slurry in which the powder additive is uniformly dispersed.

According to the slurry producing apparatus 1 and the slurry producing method using the slurry manufacturing apparatus, it is possible to realize the slurry by shortening the dispersion time by preventing the stagnation even in the case of using the additive in the light powder state.

In the following, key codes used in the specification and drawings are enumerated.

1: Slurry production equipment
3: raw materials for treatment in a slurry state or a liquid state
4: Additive in powder form
5: mixture
11: Tank
12: Dispersing device
13: Pump
14: Piping
15: Powder supply device
15b: Nozzle of powder supply device
16: processing material supply device

Claims (10)

1. A slurry producing apparatus for producing a slurry by circulating and dispersing a mixture of a raw material in a slurry state or a liquid state and an additive in a powder state,
A tank capable of storing the treatment material or the mixture and capable of supplying the additive to be mixed with the treatment material,
An outlet side connected to the tank to disperse the mixture,
A pump for circulating the mixture,
A pipe for connecting the dispersion device, the tank and the pump in series,
A powder supply device for supplying the additive to the tank;
And a treatment material supply device for supplying the treatment material to the tank,
Wherein the treatment material supply device supplies the treatment material so that a liquid level of the mixture does not occur in the tank when the additive is supplied from the powder supply device,
Slurry production apparatus. The method according to claim 1,
Wherein the powder supply device supplies the additive to a position in the bottom surface of the tank where the mixture flows from the dispersing device,
Slurry production apparatus. 3. The method of claim 2,
Wherein the treatment material supply device supplies the treatment material so that a liquid level of the mixture is generated in the tank after the supply of the additive from the powder supply device is completed,
Slurry production apparatus. The method of claim 3,
Wherein the powder supply device has a length that allows the length of the insertion portion of the nozzle into the tank to be variable,
Slurry production apparatus. 5. The method of claim 4,
Further comprising an agitator for agitating the mixture in the tank in which the liquid level has occurred after the addition of the additive is completed,
Slurry production apparatus. A slurry production method for producing a slurry by dispersing a mixture of a treatment raw material in a slurry state or a liquid state and an additive in a powder state while circulating the mixture,
The process material or the mixture is circulated to a tank, a dispersing device, a pump, and a pipe connecting them in series, while supplying the additive and the treatment material to be added to the treatment raw material or mixture in the tank, A first step of dispersing the water-
And a second step of circulating the mixture to the tank, the dispersing device, the pump and the pipe after the supply of the additive is completed, while supplying the treatment material to the mixture and dispersing the mixture,
In the first step, a liquid level of the mixture is not generated in the tank,
≪ / RTI > The method according to claim 6,
Wherein in the first step, the additive is supplied to the bottom surface of the tank at a position where the mixture flows from the disperser,
≪ / RTI > 8. The method of claim 7,
In the second step, the treatment material is supplied so that the liquid level of the mixture is generated in the tank,
≪ / RTI > 9. The method of claim 8,
Wherein the powder supply device for supplying the additive to the tank changes the length of the insertion portion of the nozzle into the tank,
In the second step, the length of the insertion portion of the nozzle is made shorter than that of the first step,
≪ / RTI > 10. The method of claim 9,
And a third step of dispersing the mixture while circulating the mixture in the tank, the dispersing device, the pump, and the pipe after the supply of the raw material for the treatment in the second step is completed.
≪ / RTI >

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