KR20130125147A - Blending apparatus and method of cleaning impeller thereof - Google Patents

Abstract

Disclosed is a stirrer having a structure capable of cleaning impeller according to a simple process and enhancing cleaning ability for rudimentum mixed in the impeller. The stirrer according to the present invention comprises a chamber unit which includes a floor plate, a cover plate which faces with the floor plate, a side wall which connects the floor plate to the cover plate, and an inner space in which mixture is contained; a stirring unit which includes a rotary shaft which penetrates through the cover plate and the impeller which is connected to one end of the rotary shaft and is located with distance from the inner surface of the chamber unit in the inner space of the chamber unit; and at least one of gas spraying unit which equips with at least one spraying nozzle opened towards the inner space from the side wall.

Description

Blending apparatus and method of cleaning impeller

The present invention relates to a stirrer and an impeller cleaning method, and more particularly, to a stirrer having a structure capable of removing a mixture stuck to an impeller by a simple process and a method for washing the impeller of the stirrer.

The electrode plate for secondary batteries is formed by coating a positive electrode active material or a negative electrode active material on a current collector plate made of aluminum (Al) or copper (Cu). The active material is mixed with a material such as a conductive material and a binder in a solvent in order to improve bonding strength, flexibility, and various other properties with the electrode plate, thereby forming an active material slurry.

The active material slurry is injected into the stirrer and then subjected to a mixing homogenization process performed by an impeller in order to increase the uniformity of the mixing. Residues of the active material slurry are stuck on the wings of the impeller during the mixing homogenization process. At this time, if the mixing homogenization process is repeated without removing the residues stuck on the impeller surface, the mixing homogenization process is difficult to be effectively performed by increasing the volume of the remaining residues. Therefore, in order to efficiently perform the mixing homogenization process for the mixture such as the active material slurry, a process of periodically cleaning the impeller should be performed.

However, in the large stirrer, the process of disassembling the stirrer and washing the impeller is not easy, which requires a lot of effort and time for washing the impeller. Accordingly, the productivity decreases in the production of the electrode plate using the active material mixture obtained from the active material slurry. There is this. Therefore, an agitator having a structure capable of washing the impeller by a simple process is required.

The present invention has been made in consideration of the prior art as described above, and provides an agitator having a structure capable of efficiently washing the impeller without disassembling the agitator, and an object thereof is to provide a method for cleaning the impeller.

In accordance with an aspect of the present invention, a stirrer includes a bottom plate, a cover plate facing the bottom plate, and sidewalls connecting the bottom plate and the cover plate, and having an inner space in which the mixture is accommodated. Chamber portion; A stirring part including a rotating shaft passing through the cover plate and an end of the rotating shaft and an impeller spaced apart from an inner surface of the chamber part in an inner space of the chamber part; And at least one gas injection unit having at least one injection nozzle opened in a direction from the side wall toward the internal space.

According to an aspect of the present invention, the injection nozzle may be located at a height corresponding to the impeller in the inner space of the chamber, or may be located higher than the impeller.

Preferably, the impeller is positioned lower than the spray nozzle when the stirrer is in a mixing homogenization mode to stir the mixture, and the spray nozzle and when the stirrer is in a cleaning mode to remove the mixture stuck to the surface of the impeller. It may be located at a corresponding height.

Preferably, the injection nozzle may face the impeller when the stirrer is in the cleaning mode.

Preferably, the apparatus further includes a driving unit connected to the other end of the rotating shaft, and the driving unit may include a rotating driving unit installed to directly or indirectly connect with the rotating shaft to transmit rotational power to the rotating shaft.

Preferably, an electric motor may be applied as the rotation driving unit.

Preferably, the driving unit may further include a lift drive unit installed to directly or indirectly connect with the rotation shaft to lift the stirring unit.

Preferably, any one selected from a piston-cylinder device, a belt-pulley device and a rack-gear device may be applied as the lift drive.

According to another aspect of the present invention, the injection nozzle may be tilted by a predetermined angle with respect to the direction from the side wall toward the rotation axis.

Preferably, the chamber portion is cylindrical, the impeller may be provided with a plurality of stirring blades.

Preferably, each of the plurality of stirring vanes, extending from the periphery of the rotation axis toward the side wall at a predetermined length, may be located at a constant interval from each other.

이하일 수 있다.(n: 교반 날개의 개수, L: 교반 날개의 길이, R: 회전 축으로부터 측벽의 내측 면에 이르는 최단 거리)Preferably, the tilt angle of the spray nozzle is greater than 0 °

(N: number of stirring blades, L: length of stirring blades, R: shortest distance from the axis of rotation to the inner side of the side wall)

Preferably, the tilting direction may be the same as the rotational direction of the rotational axis.

According to another aspect of the invention, the injection nozzle may be provided in plurality along the circumference of the side wall.

According to another aspect of the present invention, the spray nozzle may include at least two or more spray nozzles having different distances from the bottom plate.

Preferably, when the stirrer is in the cleaning mode, each of the spray nozzles may be located between the bottom and top of the impeller.

Preferably, the injection nozzle may be embedded in the side wall.

Preferably, the gas may be an inert gas.

On the other hand, the impeller cleaning method according to the present invention for achieving the technical problem, as a method for washing the impeller of the stirrer, (a) operating the lift drive device in the state in which the stirrer is mixed homogenization mode to the impeller Elevating; (b) operating the gas injector to remove the mixture stuck to the impeller surface; And (c) operating the lift drive device to lower the impeller.

Preferably, the step (a) may be a step of placing the impeller at a height corresponding to the injection nozzle.

Preferably, the step of injecting gas to the impeller through the injection nozzle.

Preferably, step (b) may be a step in which the rotation of the impeller and the injection of the gas are performed together.

Preferably, step (c) may be a step of lowering the impeller to a position lower than the injection nozzle.

According to one aspect of the invention, it is possible to wash the impeller of the stirrer according to a simple process.

According to another aspect of the present invention, it is possible to improve the washing degree of the residue stuck to the impeller of the stirrer.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention. And should not be construed as limiting.
1 is an exploded perspective view showing a stirrer according to an embodiment of the present invention.
FIG. 2 is a complete perspective view of the stirrer shown in FIG. 1.
FIG. 3A is a diagram for describing an operation when the stirrer shown in FIG. 1 is in a mixing homogenization mode.
3B is a view for explaining an operation when the stirrer shown in FIG. 1 is in a washing mode.
Figure 4a is a horizontal cross-sectional view of a stirrer according to another embodiment of the present invention.
FIG. 4B is a view for explaining a range of angles at which the spray nozzle is tilted in the stirrer shown in FIG. 4A.
5 is a horizontal cross-sectional view showing a stirrer according to another embodiment of the present invention.
6 is a vertical cross-sectional view showing a stirrer according to another embodiment of the present invention.
7 is a flow chart showing an impeller cleaning method according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

First, the structure of the agitator 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3B.

1 is an exploded perspective view showing an agitator according to an embodiment of the present invention, FIG. 2 is a complete perspective view of the agitator shown in FIG. 1, and FIG. 3A is an operation when the agitator shown in FIG. 1 is in a mixing homogenization mode. 3B is a diagram for describing an operation when the stirrer shown in FIG. 1 is in a washing mode.

1 to 3B, the stirrer 1 according to the exemplary embodiment of the present invention includes a chamber part 10, a stirring part 20, a driving part 30, and a gas injection part 40. The stirrer 1 is a mechanism for improving the mixing uniformity by stirring the contents of the secondary battery active material slurry such as an active material slurry made by mixing a binder, an additive such as a conductive material, and a solvent, so that the contents can be mixed well with each other. However, it is obvious that the use of the present invention is not limited to the mixing homogenization for the active material slurry, it can be applied to the mixing homogenization for a variety of mixtures.

The chamber part 10 has a substantially cylindrical shape in which an accommodation space S is formed, and includes a side wall 11, a bottom plate 12, and a cover plate 13. That is, the side wall 11 is connected between the bottom plate 12 and the cover plate 13 positioned to face each other to form the accommodation space S. The mixture accommodated in the accommodation space S is supported by the bottom plate 12.

In the present invention, the shape of the chamber portion 10 is not limited to a cylindrical shape, but the shape of the chamber portion 10 is preferably cylindrical in terms of efficient improvement of the mixing uniformity for the mixture to be accommodated.

The cover plate 13 may not only have a structure that can be completely detached from the side wall 12 or open like a lid, but also has a structure fixed to the side wall 12 or integrally formed with the side wall 12. . When the cover plate 13 is fixed to the side wall 12 or has a structure formed integrally with the side wall 12, the chamber portion 10 is at least one passage for injecting and withdrawing the mixture into the receiving space (S) ( Not shown).

The stirring unit 20 serves to stir the mixture accommodated in the accommodation space S, and includes a rotation shaft 21 and an impeller 22.

The rotating shaft 21 extends through the cover plate 13 from the accommodation space S of the chamber portion 10 to the outside of the chamber portion 10. The impeller 22 is connected to one end of the rotating shaft 21 in the receiving space (S), so that the rotating shaft 21 is rotated and / or lifted in the receiving space (S) can be rotated and / or lifted Do. Specific lifting ranges of the rotary shaft 21 and the impeller 22 will be described later in detail with reference to FIGS. 3A and 3B.

The impeller 22 includes a plurality of stirring vanes 22a. The stirring blade 22a extends in a predetermined length from around the rotation axis 21 toward the side wall 11 of the chamber portion 10, and is spaced apart from the side wall 11 and the bottom plate 12 of the chamber portion 10. To be located. At this time, the stirring vanes 22a are preferably positioned at regular intervals from each other.

Meanwhile, in the drawings of the present invention, only the case where the number of the stirring blades 22a is four and the shape of the flat plate is shown, but the present invention is not limited thereto. That is, the stirring vanes 22a may be formed in two, three, or four or more, and it is obvious that various shapes such as a curved shape or a shape in which at least a portion is bent by a predetermined angle may be selectively applied. will be.

The drive unit 30 is fixed to a separate bracket (not shown) or the ground, and is connected to the end of the rotation shaft 21 of the stirring unit 20 outside the chamber 10, the rotational power to the stirring unit 20 And it serves to transfer the lifting power. The drive unit 30 includes a rotation drive unit 31 for transmitting rotational power to the stirring unit 20 and a lift drive unit 32 for transferring lift power.

The rotary drive unit 31 is coupled to the end of the rotating shaft 21 of the stirring unit 20 outside the chamber 10 to transmit the rotational power to the rotating shaft 21 by the impeller 22 receiving space (S) ) To rotate within. As the rotary driver 31, a general electric motor having a rotational power transmission function may be used.

The lift driver 32 is coupled to the rotation driver 31 to transmit lift power to the rotation driver 31. Accordingly, the elevating drive unit 32 allows the stirring unit 20 to elevate in the receiving space S from the bottom plate 12 toward the cover plate 13 and in the reverse direction thereof. A specific operation range of the lift driver 32 will be described later in detail with reference to FIGS. 3A and 3B. As the lift driver 32, a cylinder-piston device to which the cylinder 32a and the piston 32b inserted therein may be applied. However, this does not limit the type of the lift driver 32. That is, it will be apparent that any actuator that is driven to lift and lower an object, such as a belt-pulley device and a rack-gear device, can be used as the lift driver 32 without limitation.

On the other hand, in the drawings of the present invention, the lift drive unit 32 is indirectly connected to the rotary shaft 21 through the rotation drive unit 31, but only illustrates the case of indirectly transferring the lift drive force to the stirring unit 20, The present invention is not limited thereto. That is, it is apparent that the lift driver 32 may be directly connected to the rotation shaft 21, and the rotation drive 31 may be indirectly connected to the rotation shaft 21 through the lift driver 32.

The gas injector 40 serves to remove the mixture stuck to the impeller 22, and includes an air compressor 41 and an injection nozzle 42.

The air compressor 41 serves to compress the gas to inject the gas at a strong pressure through the injection nozzle 42. The air compressor 41 is installed outside the chamber part 10 and may be fixed to a separate bracket (not shown) or the ground.

The injection nozzle 42 extends from one side of the air compressor 41 and penetrates the side wall 11 of the chamber part 10. The injection nozzle 42 is opened in the direction toward the internal space S from the side wall 11 of the chamber part 10 and serves to inject the compressed gas in the air compressor 41.

The specific installation position of the injection nozzle 42 and the positional relationship with the impeller 22 will be described later in detail with reference to FIGS. 3A and 3B.

Meanwhile, in the drawings of the present invention, only the case where the injection nozzle 42 protrudes from the inner surface of the side wall 11 toward the internal space S, but the present invention is not limited thereto. That is, it is apparent that the injection nozzle 42 may be installed so as not to protrude from the inner side of the side wall 11 is embedded in the side wall (11). When the injection nozzle 42 is installed so as not to protrude from the inner side surface of the side wall 11, a space for forming a longer length of the stirring blade 22a is secured. In addition, when the length of the stirring blade (22a) is formed longer, it is possible to obtain the effect of improving the stirring ability of the mixture of the stirrer (1).

Next, the operation of the stirrer 1 according to an embodiment of the present invention will be described with reference to FIGS. 3A and 3B.

FIG. 3A is a view for explaining an operation when the agitator shown in FIG. 1 is in a mixing homogenization mode, and FIG. 3B is a view for explaining an operation when the agitator shown in FIG. 1 is in a washing mode.

3A and 3B, the operation mode of the stirrer 1 is a mixing homogenization mode for stirring the mixture accommodated in the chamber portion 10 and a mixture that is stuck to the stirring blade 22a of the impeller 22. Washing mode.

When the stirrer 1 is in the mixing homogenization mode, the impeller 22 has a height H1 in which the spray nozzle 42 is installed and a height at which the mixture is filled in a state spaced apart from the bottom plate 12 by a predetermined distance D1. It is located at a low height. That is, the distance D2 from the bottom plate 12 to the top of the impeller 22 is closer than the distance H1 from the bottom plate 12 to the injection nozzle 42. The mixture is also filled at a height lower than the height H1 provided with the spray nozzle 42. Therefore, when the stirrer 1 is in the mixing homogenization mode, the impeller 22 stirs the mixture in the rotational direction M of the rotation shaft 21 while being immersed in the mixture, and the injection nozzle 42 Remains exposed to the outside of the mixture (see FIG. 3A).

When the operating state of the stirrer 1 is changed from the mixing homogenization mode to the washing mode, the piston 32b of the elevating drive unit 32 is raised so that the impeller 22 is raised to a height corresponding to the injection nozzle 42. do. That is, based on the bottom plate 12, the distance H1 to the injection nozzle 42 is farther than the distance D3 to the bottom of the impeller 22, and reaches the top of the impeller 22. It is closer than the distance D4. In addition, as described above, the height H1 provided with the injection nozzle 42 is formed higher than the height at which the mixture is filled. Therefore, when the stirrer 1 is in the cleaning mode, the impeller 22 is positioned higher than the mixture to face the injection nozzle 42 exposed to the outside of the mixture, and the injection of the gas injected from the injection nozzle 42. Washed by pressure; Preferably, in the washing mode, the spraying operation of the gas may be performed together with the rotating operation of the rotating shaft 21. In this case, it is possible to allow the impeller 22 to be cleaned as a whole by preventing the injection of the gas from concentrating on only a part of the plurality of stirring vanes 22a. (See FIG. 3B)

After the washing mode is finished, the stirrer 1 is switched to the stirring mode by lowering the piston 32b of the elevating driving unit 32 again, whereby the mixture can be stir again using the impeller 22 which has been cleaned. It becomes a state.

On the other hand, it is preferable that an inert gas such as neon (Ne), argon (Ar) or the like is used as the gas injected from the gas injection unit 40. This is to prevent the mixture from being deteriorated by a chemical reaction between the gas and the mixture contained in the chamber 10. However, the present invention does not limit the type of the gas, and it is obvious that the gas may be used without limitation as long as the gas does not cause reaction according to the type of the mixture accommodated in the chamber part 10.

As described above, the stirrer 1 according to the present invention has an effect of efficiently improving the quality of the mixture by having a structure capable of washing the stirring blade 22a in which the mixture is interlaced by a simple process.

Next, a stirrer 1a according to another embodiment of the present invention will be described with reference to FIGS. 4A and 4B.

4A is a horizontal cross-sectional view of a stirrer according to another embodiment of the present invention, and FIG. 4B is a view for explaining a range of angles at which the spray nozzle is tilted in the stirrer shown in FIG. 4A.

Compared with the stirrer 1 according to the previous embodiment, the stirrer 1a has the same components except for the installation direction of the spray nozzle 42. Therefore, in the description of the stirrer 1a, a description overlapping with the foregoing embodiment will be omitted, and the installation direction of the injection nozzle 42 will be mainly described.

Referring to FIG. 4A, the spray nozzle 42 of the stirrer 1a is tilted by a predetermined angle T with respect to the direction from the side wall 11 toward the rotation axis 21 of the stirring unit 20 ( F) is installed to face. This is to ensure that the injection pressure of the gas injected from the injection nozzle 42 is well transmitted to the stirring blade 22a. At this time, the tilting direction is preferably the same direction as the direction (M) that the rotation axis 21 rotates. In the drawings, only the case in which the rotation direction M of the rotation shaft 21 and the tilting direction of the injection nozzle 42 are counterclockwise is shown, but it is also possible to rotate clockwise. When the rotation direction M of the rotation shaft 21 and the tilting direction of the injection nozzle 42 coincide, the pressure of the gas injected through the injection nozzle 42 may be better transmitted to the stirring vane 22a. have.

이하의 값을 갖는 것이 바람직하다. (n: 교반 날개(22a)의 개수/ L: 교반 날개(22a)의 길이/ R: 회전 축(21)으로부터 측벽(11)의 내측 면에 이르는 최단 거리) 4B, the tilting angle T of the spray nozzle 42 exceeds 0 ° according to the trigonometric function calculation method.

It is preferable to have the following values. (n: number of stirring vanes 22a / L: length of stirring vanes 22a / R: shortest distance from the rotational axis 21 to the inner side of the side wall 11)

이하의 값을 갖는 경우 분사 노즐(42)은 임펠러(22)가 회전하는 동안 언제나 교반 날개(22a)를 향하게 되며, 이로써 임펠러(22)의 세척에 대한 효율을 높일 수 있다.The maximum value of the tilting angle T is such that an extension line indicating the direction in which the tilted injection nozzle 42 is directed is adjacent to the stirring vane 22a ₁ closest to the injection nozzle 42 as the impeller 22 rotates. It is a value that satisfies the condition of contact with the ends of each of the immediately following stirring vanes 22a ₂ . Therefore, the tilting angle T is

In the case of having the following values, the injection nozzle 42 always faces the stirring vanes 22a while the impeller 22 rotates, thereby increasing the efficiency for cleaning the impeller 22.

Next, a stirrer 1b according to another embodiment of the present invention will be described with reference to FIG. 5.

5 is a horizontal cross-sectional view showing a stirrer according to another embodiment of the present invention.

Compared with the stirrers 1 and 1a according to the previous embodiment, the stirrer 1b has the same components except for the number of installation of the spray nozzles 42. Therefore, in the description of the stirrer 1b, the description overlapping with the foregoing embodiment will be omitted, and the number of installations of the injection nozzles 42 will be mainly described.

Referring to FIG. 5, the stirrer 1b includes a plurality of spray nozzles 42 provided around the side wall 11 of the chamber part 10. In this case, one air compressor 41 is connected to each injection nozzle 42 or at least two or more injection nozzles 42. As described above, the stirrer 1b having the plurality of injection nozzles 42 formed therein has an effect of increasing the washing efficiency of the impeller 22. In particular, when each of the plurality of injection nozzles 42 is formed to be tilted in a predetermined range, such as the injection nozzle 42 of the stirrer 1a according to the previous embodiment, a better cleaning effect on the impeller 22 is to be expected. Can be.

Next, a stirrer 1c according to another embodiment of the present invention will be described with reference to FIG. 6.

6 is a vertical cross-sectional view showing a stirrer according to another embodiment of the present invention.

Compared with the stirrer 1b according to the previous embodiment, the stirrer 1c has a different position except that the plurality of injection nozzles 42 are formed. Therefore, in the description of the stirrer 1c, the description overlapping with the foregoing embodiment will be omitted, and the formation position of the injection nozzle 42 will be mainly described.

Referring to FIG. 6, at least one of the plurality of spray nozzles 42 has a distance from at least one of the remaining portions to the bottom plate 12 of the chamber portion 10. That is, the distances which each of the plurality of injection nozzles 42 reach from the bottom plate 12 are not all the same. In this case, when the stirrer 1c is in the washing mode, the distance from the bottom plate 12 to each of the several injection nozzles 42 is the distance from the bottom plate 12 to the bottom of the impeller 22. It is larger than (D3) and smaller than the distance (D4) to the highest point.

As described above, the stirrer 1C has a structure in which at least some of the plurality of injection nozzles 42 face the stirring vanes 22a at different heights from at least some of the others, thereby allowing the stirring vanes 22a to be separated. It is possible to wash in a wide range in the width direction (W).

Next, a method of washing the impeller 22 of the agitators 1 to 1c according to the present invention will be described with reference to FIG. 7.

7 is a flow chart showing an impeller cleaning method according to the present invention.

Referring to Figure 7, the impeller cleaning method according to the present invention, (S1) raising the impeller 22, (S2) operating the gas injection unit 40 and (S3) descending the impeller 22 It comprises the step of.

The step (S1) is a step of switching the stirrer 1 to 1c from the mixing homogenization mode to the washing mode. That is, in the step (S1), the stirring blade (22a) of the impeller 22 is the injection nozzle 42 by operating the lifting drive unit 32 while raising the piston (32b) while the impeller 22 is locked in the mixture. ).

Step (S2) is a step of washing the mixture stuck to the stirring blade (22a) by injecting gas through the injection nozzle 42 to the raised impeller (22). As described above, the injection of the gas is preferably performed together with the rotation of the impeller 22. Therefore, the step S2 may further include operating the rotation driver 31.

The step (S3) is a step of converting the stirrers 1 to 1c into the mixing homogenization mode by lowering the impeller 22 which has been cleaned through the step (S2). That is, the step (S3) is to operate the lifting drive unit 32 to lower the piston 32b so that the impeller 22 is positioned lower than the injection nozzle 42 and at the same time soaked in the mixture.

As described above, the impeller cleaning method according to the present invention, by simply washing the stirring blade (22a) of the impeller 22 in which the mixture is interlocked, has the effect of efficiently producing a good mixture.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

1, 1a, 1b, 1c: Stirrer 10: Chamber part
11: side wall 12: bottom plate
13: cover plate 20: stirring section
21: axis of rotation 22: impeller
22a: stirring blade 30: drive part
31: rotation drive unit 32: lifting drive unit
32a: cylinder 32b: piston
40: gas injection part 41: air compressor
42: spray nozzle

Claims (23)

A chamber part including a bottom plate, a cover plate facing the bottom plate, and a side wall connecting the bottom plate and the cover plate, the chamber part having an inner space in which the mixture is accommodated;
A stirring part including a rotating shaft passing through the cover plate and an end of the rotating shaft and an impeller spaced apart from an inner surface of the chamber part in an inner space of the chamber part; And
And at least one gas jet having at least one jet nozzle open in a direction from the side wall toward the internal space. The method of claim 1,
The spray nozzle
Stirrer is located at a height corresponding to the impeller in the inner space of the chamber, or higher than the impeller. 3. The method of claim 2,
The impeller
The stirrer is lower than the spray nozzle when in a mixing homogenization mode to stir the mixture,
And the stirrer is positioned at a height corresponding to the spray nozzle when the stirrer is in a washing mode to remove the mixture adhering to the surface of the impeller. The method of claim 3,
The spray nozzle
Stirrer, characterized in that facing the impeller when the stirrer is in the cleaning mode. The method of claim 1,
Further comprising a drive unit connected to the other end of the rotation axis,
The drive unit is agitator, characterized in that it comprises a rotary drive connected to the rotary shaft directly or indirectly installed to transmit rotational power to the rotary shaft. The method of claim 5,
Stirrer characterized in that the electric motor is applied as the rotation drive. The method of claim 5,
The drive unit is a stirrer, characterized in that it further comprises a lifting drive unit which is connected to the rotary shaft directly or indirectly to lift the stirring unit. The method of claim 7, wherein
An agitator, characterized in that any one selected from a piston-cylinder device, a belt-pulley device and a rack-gear device is applied as the lift drive. The method of claim 1,
And the spray nozzle is tilted by a predetermined angle with respect to the direction from the side wall toward the rotation axis. 10. The method of claim 9,
The chamber portion is cylindrical,
The impeller is agitator, characterized in that provided with a plurality of stirring blades. The method of claim 10,
Each of the plurality of stirring vanes,
Extends a predetermined length from the circumference of the rotational axis toward the side wall,
Stirrer, characterized in that located at regular intervals from each other. 12. The method of claim 11,
The tilt angle of the spray nozzle is greater than 0 °

(N: the number of stirring blades, L: the length of the stirring blades, R: the shortest distance from the rotational axis to the inner side of the side wall) 10. The method of claim 9,
The tilting direction is the stirrer, characterized in that the same as the rotation direction of the rotation axis. The method of claim 1,
A plurality of spray nozzles are installed along the circumference of the side wall. The method of claim 3,
And the spray nozzle comprises at least two spray nozzles having different distances from the bottom plate. 16. The method of claim 15,
And wherein each of said spray nozzles is located between the bottom and top of said impeller when said stirrer is in wash mode. The method of claim 1,
And the spray nozzle is embedded in the side wall. The method of claim 1,
The gas is an agitator, characterized in that the inert gas. A method of washing an impeller of a stirrer according to any one of claims 1 to 18,
(a) operating the lift drive device to raise the impeller while the stirrer is in a mixing homogenization mode;
(b) operating the gas injector to remove the mixture stuck to the impeller surface; And
(c) operating the lift drive device to lower the impeller. 20. The method of claim 19,
The step (a)
Impeller cleaning method, characterized in that for positioning the impeller at a height corresponding to the injection nozzle. 20. The method of claim 19,
The step (b)
Impeller cleaning method characterized in that for injecting gas to the impeller through the injection nozzle. 20. The method of claim 19,
The step (b)
Impeller cleaning method characterized in that the step of performing the rotation of the impeller and the injection of the gas together. 20. The method of claim 19,
The step (c)
Impeller cleaning method, characterized in that for lowering the impeller to a lower position than the injection nozzle.

Images