WO2012169759A2

WO2012169759A2 - Stirring container using a baffle parallel to the main direction of rotational flow, and stirring device having improved stirring ability comprising same

Info

Publication number: WO2012169759A2
Application number: PCT/KR2012/004419
Authority: WO
Inventors: 황욱렬
Original assignee: 경상대학교산학협력단
Priority date: 2011-06-07
Filing date: 2012-06-05
Publication date: 2012-12-13
Also published as: KR101195892B1; WO2012169759A3

Abstract

The present invention relates to a stirring container using a baffle parallel to the main direction of rotational flow, and to a stirring device having improved stirring ability comprising same. More specifically, the present invention relates to: a stirring container using a baffle parallel to the main direction of rotational flow, which container has a straightforward structure wherein the baffle is formed in a predetermined area horizontally in the main direction of rotational flow of fluids to be mixed inside a stirring tank, and is formed so as to be removed by a predetermined distance from the stirring tank by means of a support pin, and which container is able to dramatically improve mixing performance by destroying the structure of an unchanging flow surface; and a stirring device having improved stirring ability comprising the stirring container.

Description

Stirring vessel using a baffle parallel to the main rotational flow direction and agitator with improved stirring ability

The present invention relates to a stirring vessel using a baffle parallel to the main rotational flow direction and an agitator having an improved stirring ability, and more particularly, to a baffle parallel to the main rotational flow direction of the fluid to be mixed in the stirring vessel. Stirring using a baffle parallel to the main rotational flow direction, which is formed in a certain area but is formed to be spaced apart from the agitator tank by a support pin at a certain distance, thereby improving the mixing performance by breaking the structure of the invariant streamlined surface. It relates to a vessel and an agitator having improved agitation capability including the same.

A stirrer is a device for mixing two or more substances, and is a fluid mixing device widely used in various industries such as polymer polymerization, water treatment, environment, chemical, paper, petroleum, machinery, biotechnology, and steel industry.

The conventional stirrer includes, as shown in FIG. 1, a stirring vessel 10 having an empty inside to accommodate the materials to be mixed therein with the fluid; A rotating shaft 20 disposed at an inner center of the stirring tank 10; At least one rotary blade 30 formed radially of the rotary shaft 20; And driving means (not shown) connected to an upper end of the rotating shaft 20 to drive the rotating shaft 20. It is made, including.

Thus, the stirrer mixes the fluid and the mixed materials as the rotary blade 30 rotates inside the stirring vessel 10.

At this time, the mixing of the blades, the formation angle and the shape of the rotary wing 30 may be adjusted to improve mixing, but even if the shape of the rotary blade 30 is changed from the perspective of the dynamic system as shown in FIG. Similarly, secondary primary, which is a primary primary rotational flow about the axis of rotation of the rotary blade 30 and a rotational flow in the cross section by the axial flow formed by the inertia or the rotary blade 30 It consists of two rotational flows (rotation flow) and has a dynamic structure formed by donut-shaped streamline.

Especially when mixing highly viscous materials (polymer fluids, emulsions, suspensions, paints, foodstuffs, etc.), the invariant streamed surface (40) of the donut form (torus, to which the mammary gland is fixed) Thereby, there is a problem that the movement of the material at the time of mixing is limited to the initially determined streamline surface and the mixing performance is significantly reduced.

The present invention has been made to solve the problems described above, an object of the present invention is to form a baffle in a predetermined region parallel to the main rotational flow direction of the fluid to be mixed in the stirring tank by a support pin It is a simple structure that is formed to be spaced from a certain distance, and it causes chaotic flow to the mixed fluid and destroys the cross-sectional structure of the invariant streamline surface formed by the secondary flow, which disturbs the flow field and dramatically improves the mixing performance. It is to provide an agitator vessel using a baffle parallel to the main rotational flow direction and the agitator having an improved agitation capability including the same.

Stirring vessel using a baffle parallel to the main rotational flow direction of the present invention for achieving the above object, the stirring tank 110 is formed to be hollow so that the fluid can be received; At least one baffle 130 formed at a predetermined distance apart from an inner wall of the stirring tank 110 and formed in a predetermined region parallel to a main flow direction of the fluid; And support pins 120 having both ends coupled to the stirring vessel 110 and the baffle 130 to support the baffle 130. Characterized in that comprises a.

In addition, the baffle 130 is formed perpendicular to the central axis of the stirring vessel 110, characterized in that formed at a predetermined distance from the inner wall of the stirring vessel 110.

In addition, the baffle 130 is formed horizontally with respect to the central axis of the stirring tank 110, characterized in that formed at a predetermined distance from the inner wall of the stirring tank 110.

In addition, the baffle 130 is formed to be inclined with respect to the central axis of the stirring tank 110, characterized in that formed at a predetermined distance from the inner wall of the stirring tank 110.

In addition, the baffle 130 is characterized in that the disc is a flat plate of the open part.

In addition, the baffle 130 is characterized in that formed in a spiral.

In addition, the baffle 130 is characterized in that the angle (α) formed relative to the central axis when viewed from the upper side, the stirring tank 110 is in the range of 90 ° to 270 °.

In addition, the baffle 130 or the support pin 120 is characterized in that the temperature control means and a temperature sensor is provided.

In addition, the baffle 130 is characterized in that the through-hole 131 is formed inside.

And the stirrer is improved stirring ability of the present invention, the stirring vessel using a baffle parallel to the main rotational flow direction (100); And a rotation means 140 capable of rotating the fluid inside the stirring vessel 100. Characterized in that comprises a.

The present invention has been made to solve the problems described above, the stirring vessel using a baffle parallel to the main rotational flow direction of the present invention and the stirrer with improved stirring ability, including a fluid to be mixed inside the stirring vessel The baffle is formed in a certain area horizontally in the direction of the main rotational flow of and is formed to be spaced a certain distance from the agitator tank by a support pin. There is an advantage that can dramatically improve the mixing performance by breaking and disturbing the flow field.

In addition, the baffle may be formed to be spaced apart from the inner wall of the stirring tank by a predetermined distance to minimize the slow speed of the baffle and the stirrer wall meet.

In addition, since the baffle promotes mixing by causing chaos in the flow field, the shear force applied to the fluid is small and even, and the flow resistance (shear resistance) of the fluid can be reduced, thereby reducing the energy required for mixing the fluid. .

In addition, by installing a hot wire and a temperature sensor inside the baffle or the support pin to uniform the temperature field of the mixture in the agitator, there is an advantage that the temperature control during the chemical reaction of the mixture is easy.

In addition, additional mixing performance improvement may be obtained by adjusting the position of the support pin for fixing the baffle.

1 is a schematic view showing a conventional stirrer.

FIG. 2 is a schematic diagram illustrating a dynamic structure of the fluid inside the stirrer of FIG. 1. FIG.

3 and 4 are a perspective view and a top plan view showing a first embodiment of a stirring vessel using a baffle parallel to the flow direction of the present invention and an agitator having improved stirring ability.

Figure 5 is a schematic cross-sectional view showing the dynamic structure of the fluid in the stirring vessel without the baffle formed.

6 is a schematic cross-sectional view showing a front sectional view and a dynamic structure of a fluid in the baffle of FIG.

7 is a perspective view showing a second embodiment of the present invention.

FIG. 8 is a front sectional view of FIG. 7 and a cross sectional schematic diagram showing the dynamic structure of the fluid; FIG.

9 is a perspective view showing a third embodiment of the present invention.

10 is a front sectional view of FIG. 9 and a cross-sectional schematic diagram showing the dynamic structure of the fluid.

11 and 12 are a perspective view and a front sectional view showing a fourth embodiment of the present invention.

13 and 14 are a perspective view and a front sectional view showing a fifth embodiment of the present invention.

FIG. 15 is a schematic diagram showing the dynamic structure of a fluid in sections A, B, C, and D of FIG.

Hereinafter, with reference to the accompanying drawings, a stirring vessel using a baffle parallel to the main rotational flow direction of the present invention as described above and an improved stirring ability including the same.

3 and 4 are a perspective view and a top view showing a first embodiment of a stirring vessel using a baffle parallel to the main rotational flow direction of the present invention and an agitator having improved stirring ability.

As shown, the stirring vessel using a baffle parallel to the main rotational flow direction of the present invention, the stirring tank 110 is formed to be hollow inside to accommodate the fluid; It is formed to be spaced apart from the inner wall of the stirring tank 110 by a predetermined distance, and is located inside the invariant streamline surface generated when the fluid inside the stirring tank 110 is parallel to the main rotational flow direction of the fluid in the constant streamline surface One or more baffles 130 formed; And support pins 120 having both ends coupled to the stirring vessel 110 and the baffle 130 to support the baffle 130. It is made, including.

And the stirrer is improved stirring ability of the present invention, the stirring vessel using a baffle parallel to the main rotational flow direction (100); And a rotation means 140 capable of rotating the fluid inside the stirring vessel 100. It is made, including.

First, the stirring vessel 100 using the baffle parallel to the main rotational flow direction is formed inside the stirring tank 110 to be hollow so that the fluid and the mixed materials to be mixed therein can be accommodated therein.

In this case, although the upper side of the stirring tank 110 is shown in Figure 3 and 4, the upper surface of the mixing tank and a separate material so that the contents do not overflow or splash outside the stirring tank 110 when mixing the top plate It can be formed to be sealed.

And one side of the support pin 120 is coupled to the side wall or bottom of the stirring vessel 110 and the baffle 130 is coupled to the other side so that the baffle 130 is spaced apart from the inner wall of the stirring vessel 110 by a predetermined distance. The baffle 130 is positioned inside the invariant streamline surface generated when the fluid inside the stirring vessel 110 rotates, and is formed parallel to the main rotational flow direction of the fluid in the invariant streamline surface.

Here, the main rotational flow direction of the fluid in the constant streamline surface is a direction in which the fluid rotates in a circular shape along the toric shape when the stirring tank 110 is viewed from above.

And the baffle 130 is formed in the form of a thin plate and the center portion is made of a blank disc, the baffle 130 is viewed from the upper side when the stirring tank 110, the central axis relative to The angle α to be formed is formed at 90 ° to 270 °.

That is, the baffle 130 is formed in the shape of a disc with an empty central portion, and is formed in the form of an arc with a part cut off.

In addition, the support pin 120 is coupled to one side of the side wall or the bottom of the stirring vessel 110 to secure the baffle 130, the other side is coupled to the outer surface or bottom surface of the baffle 130. Can be.

In this case, the support pin 120 may be formed in the form of a thin and long bar (bar), a plurality of support pins 120 may be used.

Thus, the stirring vessel 100 using the baffle parallel to the main rotational flow direction configured as described above comprises a rotating means 140 composed of a rotating shaft 141 and a rotating blade 142 to rotate the fluid therein. Agitator 1000 is made.

In the stirrer 1000, the support pin 120 and the baffle 130 have the length, thickness, and baffle 130 of the support pin 120 in a range without interference with the rotation shaft 141 and the rotor blade 142. Position and the like may be formed in various ways, it may be formed anywhere in the upper or lower direction of the rotary blade 142.

In addition, the rotating means 140 has been shown to be composed of a rotating shaft 141 and the rotary blade 142, but can be used without limitation as long as it can rotate the fluid stored in the stirring vessel 100 in addition.

Thus, the principle of the stirring vessel using a baffle parallel to the main rotational flow direction of the present invention constituted as described above and the stirrer with improved stirring ability including the same will be described.

First, when the fluid (mixed materials) to be mixed in the stirring vessel 110 is filled, the fluid is directly rotated about the rotation axis 141 by the rotation of the rotating means 140 and the axial flow or Two rotational flows of the secondary rotational flow in the cross section due to the inertia of the rotating fluid are generated, and the two flows form a streamlined surface (see FIG. 2) having a donut-shaped torus structure. It has a structure of system.

At this time, the inner surface is separated from the outside to form an invariant streamed surface as the boundary of the streamlined surface formed in the donut shape, and thus the movement of the fluid in the mixing process is limited to the streamlined surface initially determined and mixed. The performance is significantly reduced.

In general, these nonlinear dynamics are called KAM torus and in agitated flows are called IMMs (Isolated Mixing Regions).

Thus, when the baffles are not formed and the rotating means 140 including the rotating shaft 141 and the rotating blades 142 is formed in the stirring tank 110, and the fluid is rotated by the rotating means 140, the rotating blades. A flow in which a toric-shaped invariant streamline surface is formed on the upper side and the lower side of 142, respectively, is formed around the rotation shaft 141 to show a kinetic flow structure as shown in FIG. 5 in cross section.

That is, the fluid is the main flow of the torus form around the rotation axis 141 and at the same time the rotational flow on the vertical cross section of the torus form occurs together.

Of course, according to the shape and size of the rotor blade 141, the structure of the toric body may be different from that shown in Figure 5, in any case, the flow in the agitator of the fluid having a high viscosity is laminar flow, accordingly It is obvious that a dynamics system consisting of an invariant streamline is formed.

At this time, in the present invention, the baffle 130 is formed to be parallel to the main rotational flow direction of the toric shape, wherein the baffle 130 is fixed on the inner wall of the stirring tank 110 by the support pin 120. 6, the baffle 130 is positioned inside the invariant streamline surface of the cross-sectional rotational flow as shown in FIG. 6.

Here, the baffle 130 is formed parallel to the main rotational flow direction of the toric shape, which is formed along the circumferential direction of the stirring vessel 110, but is variously shaped like vertical, horizontal or inclined to the central axis. It can be formed and shown in Figure 6 baffle 130 of the shape perpendicular to the central axis.

In this case, the baffle 130 is formed perpendicular to the central axis of the stirring tank 110, as shown, when the stirring tank 110 is formed in a cylindrical shape and perpendicular to the central axis of the stirring tank ( It is also formed perpendicular to the side wall of the 110 and horizontal to the floor.

And the central axis is generally the rotation axis of the rotation means 140 is the central axis when the rotation means 140 is configured inside the stirring tank 110.

Thus, the continuous flow is divided in the cross-sectional rotational flow of the fluid by the baffle 130, and mixed again in the region where the baffle 130 is not formed.

That is, the stirring vessel using the baffle parallel to the main rotational flow direction of the present invention and the stirrer with improved agitation ability have a different streamline shape between the two wired surfaces because the shape of the streamline in the region where the baffle 130 is present and the region that does not exist is different. The process of breaking the conventional constant streamline structure by inducing twisting is repeated periodically as the fluid material rotates, thereby improving mixing performance.

In particular, such mixing may be expected to improve the mixing performance is excellent compared to the case without the baffle 130 when the material has a high viscosity or the rotational speed is not expected to form the turbulence.

In addition, since the baffle 130 is formed to be spaced apart from the inner wall of the stirring tank 110 by the support pin 120, there is an advantage of reducing a region having a slow speed of the stirring tank wall, and mixing with low shear force based on chaotic mixing. Because of this, the flow resistance of the fluid is low and the power consumption is low.

That is, when one side of the baffle is formed by being directly coupled to the inner wall of the stirring vessel, the flow of fluid is stagnated at the portion to be coupled, thereby increasing the flow resistance and reducing the mixing performance of the fluid at the stagnant portion. On the other hand, in the present invention, since the baffle 130 is configured to be spaced a predetermined distance from the inner wall of the stirring tank 110 by the support pins 120, only the support pins 120 are in contact with the stirring tank 110. The portion where the flow is stagnant becomes very small, so that the flow resistance is reduced and the mixing performance can be further improved.

In addition, since the flow resistance of the fluid is reduced, there is an advantage that can reduce the energy required for rotation.

In addition, the support pin 120 may give additional disturbances to the wired structure, so that the mixing performance may be improved.

Various embodiments of the present invention based on the above principles will be described below.

7 and 8, the baffle 130 is formed horizontally with respect to the central axis of the stirring tank 110 and is spaced apart from the inner wall of the stirring tank 110 by a predetermined distance. Can be.

9 and 10, the baffle 130 may be formed to be inclined with respect to the central axis of the stirring vessel 110 and may be formed to be spaced apart from the inner wall of the stirring vessel 110 by a predetermined distance. have.

That is, in the first and second embodiments, the baffles 130 formed perpendicular to the central axis are formed in the horizontal or inclined form in the second and third embodiments, respectively.

This has the advantage that the baffle 130 is formed horizontally, vertically or inclined according to the shape of the streamline surface of the cross-sectional rotational flow, thereby reducing the flow resistance in the cross-sectional rotational flow.

That is, when the shape of the cross-sectional rotational flow of the mixed fluid is formed in the diagonal direction by the position or the shape of the rotating shaft 141 and the rotary blade 142 of the rotating means 140, the baffle 130 is formed to be inclined. The flow resistance can be further reduced.

In addition, as shown in FIGS. 11 and 12, the baffle 130 may be formed as a flat plate having a portion of an open disk. In this case, the baffle 130 having the disc shape may include the rotary blade 142. It can be configured on the lower side of the.

Since there is no interference in the rotary shaft 141 below the rotary blade 142 is formed in a form perpendicular to the central axis as in the first embodiment, the baffle 130 is formed in the form of a disk block of the central portion Can be.

In addition, in the fifth embodiment, as shown in FIGS. 13 and 14, the baffle 130 may have a disk-shaped baffle 130. The fluid baffle 130 may have a spiral shape as shown in FIGS. 13 and 15. 130, each of the A, B, C, and D points passing through the cross-sectional rotation flow is divided in the shape is changed and recombined process is repeated, so that the mixing performance can be improved.

That is, the deformation to form the baffle 130 in a spiral manner can be applied in the same manner in the first embodiment, the second embodiment, and the third embodiment, and forms a secondary rotational flow of a continuous cross section similar to FIG. The mixing performance can be improved.

In addition, the baffle 130 or the support pin 120 may be provided with a temperature control means and a temperature sensor, thereby enabling to uniformly control the temperature field of the mixture in the stirrer to further improve the mixing performance have.

In addition, the through hole 131 may be formed inside the baffle 130 to improve mixing performance.

Referring to FIG. 3, when a through hole 131 is formed inside the baffle 130, droplets accelerate through the through hole 131 due to a pressure difference between an upper portion and a lower portion of the baffle 130. As it is elongated, it is dispersed in the deceleration process, and even and small droplets are formed. In this case, the droplet refers to a case in which different fluids are formed in two-phase by surface tension.

Thus, the through hole 131 formed in the baffle 130 may further improve the mixing performance, and the through hole 131 is formed in the baffle 130 to reduce the area blocking the flow of the fluid. It can be obtained to reduce the flow resistance and thus has the advantage of reducing the power consumption.

In this case, the through hole 131 may be formed in various shapes to allow fluid to pass therethrough, and may be applied to various types of baffles 130 shown in the embodiment of the present invention.

In addition, when the formation angle α of the baffle 130 is formed to be less than 90 °, the mixing enhancement effect by the baffle 130 is insufficient, and the formation angle α of the baffle 130 is 270 °. In the case where the baffle 130 is formed in excess, the baffle 130 may act as an element that hinders the remixing by dividing the flow of the fluid rather than the baffle 130. When the inside of the stirring vessel 110 is viewed from above, an angle α formed based on the central axis is formed in a range of 90 ° to 270 °.

If the baffles 130 are formed in plural at regular intervals along the circumferential direction of the stirring vessel 110, the angle α at which the one baffle 130 is formed with respect to the central axis is Even if it is less than 90 ° can be expected to improve the mixing performance due to the division of the dynamic system by a plurality of baffles (130).

In addition, the present invention uses a method of increasing the mixing performance by creating a chaotic flow in which the constant streamline surface is destroyed by creating a completely different flow pattern in the other zone in the stirrer, according to the shape and size of the rotary blade of the rotating means The dynamic structure may be different, but the principle that chaotic occurs by alternating different kinetic streamline structures by baffles should be applied invariably.

And the upper plate that can be formed on the upper side of the stirring tank 110 may be configured to drive the supply pipes and the driving means (not shown) to drive the rotating means 130 to supply the material to be mixed. In addition, a door or a cap may be formed on the upper plate to check or clean the inside of the stirring tank 110.

In addition, the lower side of the stirring vessel 110 may be formed separately to the discharge pipe to discharge the contents.

In addition, the drawing shows an example in which the stirring tank 110 is formed in a cylindrical shape, but may be formed in various ways such as a square, a polygon, or a shape in which a lower portion of the stirring tank 110 is not flat.

In addition, when a plurality of rotary blades 142 is formed on the rotary shaft 141 by the rotary means 140, the shape and number of the rotary blades 142 may be formed in various ways in addition to those shown in the drawings.

The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

[Description of the code]

1000: Agitator (of the present invention)

100: stirring vessel

110: stirring tank 120: support pin

130: baffle 131: through hole

140: rotation means

141: rotating shaft 142: rotary blade

Claims

Stirring tank 110 is formed to be hollow to accommodate the fluid;

At least one baffle 130 formed at a predetermined distance from an inner wall of the stirring vessel 110 and formed in parallel to a main rotational flow direction of the fluid; And

Support pins 120 having both ends coupled to the stirring vessel 110 and the baffle 130 to support the baffle 130; Stirring vessel using a baffle parallel to the flow direction comprising a.
The method of claim 1,

The baffle 130 is formed vertically with respect to the central axis of the stirring tank 110 and using a baffle parallel to the main rotational flow direction, characterized in that formed at a predetermined distance apart from the inner wall of the stirring tank 110 Stirring vessel.
The method of claim 1,

The baffle 130 is formed horizontally with respect to the central axis of the stirring tank 110 and using a baffle parallel to the main rotational flow direction, characterized in that formed at a predetermined distance from the inner wall of the stirring tank 110 Stirring vessel.
The method of claim 1,

The baffle 130 is formed to be inclined with respect to the central axis of the stirring tank 110 and stirred using a baffle parallel to the main rotational flow direction, characterized in that formed at a predetermined distance apart from the inner wall of the stirring tank 110 Vessel.
The method of claim 1,

The baffle 130 is a stirring vessel using a baffle parallel to the main rotational flow direction, characterized in that part of the open disk-shaped flat plate.
The method of claim 5,

The baffle 130 is a stirring vessel using a baffle parallel to the main rotational flow direction, characterized in that formed in a spiral.
The method of claim 1,

The baffle 130 is an angle (α) formed based on the central axis of the stirring tank 110 when viewed from the upper direction, characterized in that the 90 ° to 270 ° range Stirring vessel using baffles parallel to the direction of rotational flow.
The method of claim 1,

The baffle 130 or the support pin 120 is a stirring vessel using a baffle parallel to the main rotational flow direction, characterized in that the temperature control means and a temperature sensor is provided therein.
The method of claim 1,

The baffle 130 is a stirring vessel using a baffle parallel to the main rotational flow direction, characterized in that the through-hole 131 is formed on the inside.
A stirring vessel 100 using a baffle parallel to the main rotational flow direction of any one of claims 1 to 9; And

Rotating means 140 for rotating the fluid inside the stirring vessel 100; Stirrer with improved stirring ability, characterized in that comprises a.