CN210584602U

CN210584602U - Flow guide type stirring device suitable for high-viscosity fluid mixing

Info

Publication number: CN210584602U
Application number: CN201920610415.9U
Authority: CN
Inventors: 张敏革; 李一鑫
Original assignee: Tianjin University of Science and Technology
Current assignee: Tianjin University of Science and Technology
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-05-22
Anticipated expiration: 2029-04-26

Abstract

The utility model provides a water conservancy diversion formula agitating unit suitable for high viscous fluid mixes. The stirring device is composed of a stirring shaft 1, a quadric surface type blade 2, a blade guide plate 3, a wall surface guide plate 4, a stirring container 5, a material inlet 6, a material outlet 7, a sealing component 8 and a driving mechanism 9. The stirring paddle is a quadric surface with a strip-shaped opening, a strip-shaped guide plate is welded on the paddle surface, and a spiral rising type guide plate is matched on the stirring container 5. When the stirring paddle rotates, the secondary curve blade 2 guides the fluid to flow from the low shear near the stirring shaft 1 to the high shear region near the wall of the stirring container 5, and simultaneously the blade guide plate 3 and the wall guide plate 4 guide the fluid to flow upwards from the bottom of the stirring container 5, so that the circulation flow of the main body fluid is accelerated. The stirring device can simultaneously realize the radial, circumferential and up-and-down circulating flow of the fluid in the stirring container 5, strengthen the convection diffusion and the vortex diffusion of the fluid in the stirring container 5 and greatly shorten the stirring and mixing time.

Description

Flow guide type stirring device suitable for high-viscosity fluid mixing

Technical Field

The utility model relates to a fluid mixing technical field, especially a water conservancy diversion formula agitating unit suitable for high viscous fluid mixes, this kind of agitating unit structurally has the water conservancy diversion effect to liquid, can realize high viscous fluid flash mixed, and the wide application is in trades such as chemical industry, food.

Background

The stirring and mixing process is a very important unit operation process in chemical and food industries, and mixes various fluids uniformly by a forced means, such as mixing of bubbles and liquid, mixing of liquid and liquid drops, mixing of liquid and solid particles, and the like. The quality of the mixing performance directly influences the performance of the final product. The mixing process is the combined action of three diffusion mechanisms of fluid convection diffusion, vortex diffusion and molecular diffusion. The convective diffusion is to decompose different materials into larger lumps and disperse them quickly, the eddy diffusion is carried out between the larger lumps and the liquid flow interface, and finally the solution is uniform through molecular diffusion. The three diffusion mechanisms are that molecular diffusion is dispersion on a microscopic scale, the speed of dispersion is mainly related to the physical properties of the liquid to be dispersed, and the action of an external physical method on the dispersion is not great. And convection diffusion and vortex diffusion can be enhanced by changing the stirring blade pattern.

The high viscosity fluid is a special fluid in petrochemical industry, light industry, food industry and pharmaceutical industry, has high viscosity which can reach the range of dozens to thousands of pascal seconds, and is mostly non-Newtonian fluid. Because of the higher viscosity and the lower flowing speed, the rotating speed of the stirring paddle is generally lower than that of other low-viscosity fluids in the stirring container, the centrifugal action of the fluids is weaker, and the liquid level is difficult to present a concave shape like the liquid level when the low-viscosity fluids are stirred. In some special applications, the high viscosity fluid needs to be mixed uniformly in a short time, which poses a challenge to the design and development of the stirring device, especially the stirring paddle.

Conventional paddles for high viscosity fluids are offset frame, ribbon, screw, etc. The stirring paddles are characterized by large diameter and are very close to the wall surface and the bottom of the stirring container, and mainly prevent the high-viscosity fluid from generating stagnation areas on the wall surface and the bottom of the stirring container to form lumps, and the stagnation areas need to be cleaned and maintained frequently, so that the effective utilization rate of the equipment is influenced finally. The stirring paddle rotates in the stirring container, the tangential force transmitted to the liquid by the stirring paddle is very large, and then the fluid mainly makes tangential circular motion or is in dominant action with the circular motion, so that the mixing speed of the fluid is influenced. On the other hand, when the stirring paddle rotates, the tangential force on the fluid at the end of the paddle is large, the flow speed of the fluid is high, and the disturbance of the fluid at the stirring shaft is low, and the flow speed is low. If a stirring device can be developed, the fluid can circulate up and down while doing circular motion, and the fluid can flow to the end area of the blade, so that the mixing time of the high-viscosity fluid can be shortened to a great extent.

The utility model discloses based on above analysis, provide an agitating unit who has the water conservancy diversion effect to high viscous fluid.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an agitating unit suitable for high viscosity fluid flash mixed. When the stirring paddle rotates, the fluid generates radial flow and up-and-down circulation flow under the dual action of the paddle and the wall of the stirring container, so that the stirring and mixing speed can be obviously improved.

The utility model discloses a agitating unit for polymer dispersion dissolves is the metal material, like carbon steel, alloy steel, cast steel etc..

The utility model discloses technical scheme as follows:

a flow-guiding type stirring device suitable for mixing high-viscosity fluid is composed of a stirring shaft 1, a quadric surface type blade 2, a blade guide plate 3, a wall surface guide plate 4, a stirring container 5, a material inlet 6, a material outlet 7, a sealing component 8 and a driving mechanism 9.

The number of the secondary curve type blades 2 is two, when viewed from top to bottom, the secondary curve type blades 2 are in an s shape, and the bending curvature of a turning part in the s shape is not large; the upper part and the lower part of the quadratic curve paddle 2 are horizontal straight lines when viewed from the side, and two ends are vertical straight lines. The secondary curve type blade 2 is connected with the stirring shaft 1 through welding. The secondary curve type blade 2 is mainly made of a steel plate with a certain thickness by rolling according to the required bending curvature, 2-3 strip-shaped openings are formed in the secondary curve blade 2, the opening rate is about 50%, and the distance between the two openings is suitable for not influencing the strength.

The blade guide plate 3 is provided with a plurality of steel plates with certain thickness and width, the number of the steel plates is not more than 5, the thickness is determined according to the specific use strength, and the width is 5-20 cm. Seen from the side, the blade guide plate 3 and the stirring shaft 1 form an angle of 10-40 degrees and are connected with the quadratic curve type blade 2 through welding.

The blade guide plate 3 exists on the blade surface of the secondary curve type blade 2, and the blade back does not exist.

The wall surface guide plate 4 is a steel plate strip with certain thickness and width, and the steel plate strip is spirally arranged in an ascending way when viewed from top to bottom and is connected with the stirring container 5 through welding.

The stirring shaft 1 is connected with the stirring container 5 through a sealing component 8; in operation, the stirring shaft 1 rotates clockwise when viewed from top to bottom.

The stirring container 5 is a cylindrical barrel, the upper part and the lower part of the barrel are both standard elliptical seal heads, and the seal heads are connected with the barrel through flanges.

The feed liquid inlet 6 is located at the upper end enclosure position of the stirring container 5, and the feed liquid outlet 7 is located at the lower end enclosure position of the stirring container 5, but the feed liquid inlet and the feed liquid outlet are not limited to these two positions, and can be installed at other positions of the stirring container 5 according to specific requirements.

The specific parameters of the driving device 9 can be determined according to the physical properties of the materials to be processed, the processing amount, the rotating speed and the like.

The utility model discloses an innovation point lies in having developed a stirring rake and stirred vessel 5 that has a certain structure, and both cooperations are used for the paddle when rotatory, can guide the transfer in the high velocity of flow district near stirred vessel wall from the low velocity of flow district at stirred vessel 5 center, simultaneously, has promoted the high viscosity of flow to the flow on stirred vessel upper portion from stirred vessel bottom, has realized the dual motion that the high velocity of flow is radial flow again from top to bottom.

The utility model discloses a high viscosity fluid provides a difficult caking, the short mixing strategy of churning time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of a stirring device according to an embodiment of the present application

FIG. 2 is a plan view of a stirring device according to an example of the present application

FIG. 3 is a three-dimensional view of a paddle according to an embodiment of the present application

FIG. 4 is a three-dimensional view of an agitation tank of an embodiment of the present application

In the figures 1-4, 1 is a stirring shaft, 2 is a quadric surface type blade, 3 is a blade guide plate, 4 is a wall guide plate, 5 is a stirring container, 6 is a material inlet, 7 is a material outlet, 8 is a sealing component, 9 is a driving mechanism.

Detailed Description

The utility model provides a water conservancy diversion formula agitating unit suitable for high viscous fluid mixes. The stirring blade is a quadric surface with a strip-shaped opening, a strip-shaped guide plate is welded on the blade surface, and a spiral ascending type guide baffle is matched on the stirring container. When the stirring paddle rotates, the quadric surface type blade guides the fluid from the center of the stirring container to a high shear rate area at the periphery of the stirring, and the guide plate on the blade guides the liquid to spirally rise upwards and downwards in the stirring tank. The radial flow and the up-and-down circulation flow of the high-viscosity fluid in the stirring container 5 are realized, and the convection diffusion and the vortex diffusion of the fluid in the stirring container are enhanced.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

As shown in fig. 1-4, a diversion type stirring device suitable for mixing high viscosity fluid comprises a stirring shaft 1, a quadric surface type blade 2, a blade deflector 3, a wall surface deflector 4, a stirring container 5, a material inlet 6, a material outlet 7, a sealing member 8 and a driving mechanism 9. The two quadric surface type blades 2 are symmetrically arranged at two sides of the stirring shaft 1, the quadric surface type blades 2 are s-shaped quadric surfaces from top to bottom, the upper parts and the lower parts of the quadric surface type blades 2 are straight lines and the two sides are vertical straight lines when viewed from the side; gaps are reserved between the two sides of the secondary curve paddle 2 and the wall of the stirring container 5, and the size of the gaps is about one tenth of the diameter of the secondary curve paddle 2. A plurality of blade guide plates 3 are welded on the blade surface of the secondary curved surface type blade 2, and the back surface of the blade is not provided with the blade; the shape of the blade guide plate 3 is a slender steel plate with a certain thickness, and the blade guide plate is arranged in the obliquely upward direction of 5-20 degrees on the stirring shaft 1. The inner wall surface of the stirring container 5 is provided with a spiral rising wall surface guide plate 4.

Wherein, the diameter of the quadric surface type blade 2 is about 90 percent of the diameter of the stirring container 5, and the height is about 70 to 90 percent of the height of the stirring container 5 except the upper seal head; the secondary curved surface type blade 2 is formed by rolling a steel plate with a certain thickness, 2-3 strip-shaped holes are formed in the blade, the aperture ratio is about 50% -70%, and the distance between the two holes is not less than 20 cm.

The blade guide plates 3 are formed by cutting steel plates with certain thickness, the width is about 5-20cm, the thickness is about 3-10mm, 3-5 strips are arranged on each blade guide plate 3, and the blade guide plates 3 are vertically welded and connected with the quadric surface type blades 2.

Wherein, the wall guide plate 4 is formed by cutting a steel plate with certain thickness, the width is 5-20cm, the thickness is 3-10mm, the inner wall surface of the stirring container 5 is welded in a spiral rising shape, and the thread pitch is generally 1-2 times of the diameter of the quadric surface type blade 2. The wall surface guide plate 4 is vertically welded with the inner wall surface of the stirring container 5.

Wherein, stirred vessel 5 is cylinder type tubular structure, and upper and lower both ends are ellipsoid type head, pass through flange joint between head and the barrel, and it has material import 6 and material export 7 to open on the head, and the concrete position of material import 6 and material export 7 on the head is according to specific situation and decides.

In practical application, the stirring shaft 1, the quadric surface type blade 2 and the blade guide plate 3 all rotate clockwise from top to bottom, and under the action of the quadric surface type blade 2 and the blade guide plate 3, high-viscosity fluid flows from a low-shear region at the center of the stirring container 5 to a high-shear region near the wall surface of the stirring container 5, and convection dispersion and vortex dispersion are performed under the action of high-shear force at the end part of the blade. Part of the high-viscosity fluid spirally rises to the liquid level along the inner wall surface of the stirring container 5 under the combined action of the paddle guide plate 3 and the wall surface guide plate 4, and then flows to the middle of the stirring container 5 from the liquid level. The radial motion, the circular motion and the up-and-down motion of the high-viscosity fluid in the stirring tank are realized, and the integral circulation of the fluid is realized.

In practical application, the diameter and the height of the quadric surface type blade 2 are large, and the gap between the quadric surface type blade and the inner wall surface and the bottom of the stirring container 5 is small, so that high-viscosity lumps deposited on the wall surface can be cleaned in time, and aggregation and agglomeration are avoided.

In practical application, the strip-shaped openings on the secondary curved surface type blade 2 are arranged at a certain distance from the stirring shaft, and the openings provide high shearing force for the high-viscosity fluid agglomerates at the same rotating speed, so that the convection diffusion and the vortex diffusion of the high-viscosity fluid are enhanced, the dispersion and the mixing of the high-viscosity fluid are accelerated, and the stirring and mixing time is shortened.

Above, only the preferred embodiment of the present invention has been described, not to the limitations of the present invention in any form, although the present invention has been disclosed with the preferred embodiment, but not limited to the present invention, any skilled person familiar with the art can make some changes or modifications to equivalent embodiments with equivalent changes within the technical scope of the present invention, and any simple modification, equivalent changes and modifications made to the above embodiments by the technical spirit of the present invention still belong to the technical scope of the present invention.

Claims

1. The utility model provides a water conservancy diversion formula agitating unit suitable for high viscous fluid mixes, includes (mixing) shaft (1), quadric surface formula paddle (2), paddle guide plate (3), wall guide plate (4), stirred vessel (5), material import (6), material export (7) and sealing member (8) and actuating mechanism (9), its characterized in that: the two quadric surface type blades (2) are symmetrically arranged at two sides of the stirring shaft (1), the quadric surface type blades (2) are s-shaped quadric surfaces from top to bottom, the upper part and the lower part of the quadric surface type blades (2) are horizontal straight lines from side view, and the end parts of the blades are vertical straight lines; gaps are reserved between the end part and the lower part of the quadric surface type blade (2) and the stirring container (5), the size of the gap is about one tenth of the diameter of the quadric surface type blade (2), a plurality of blade guide plates (3) are welded on the blade surface of the quadric surface type blade (2), and the blade back is not provided; the shape of the blade guide plate (3) is a slender steel plate with a certain thickness, the stirring shaft (1) is in a direction of 5-20 degrees, and the inner wall surface of the stirring container (5) is provided with a spirally-rising wall surface guide plate (4).

2. The flow-guiding stirring device suitable for high-viscosity fluid mixing of claim 1, wherein the diameter of the quadric surface type blade (2) is about 90% of the diameter of the stirring container (5), and the height of the quadric surface type blade is about 70% -90% of the height of the stirring container (5) except for the upper sealing head; the quadric surface type blade (2) is formed by rolling a steel plate with a certain thickness, 2-3 strip-shaped holes are formed in the blade, the aperture ratio is about 50% -70%, and the distance between the two holes is not less than 20 cm.

3. The flow-guiding type stirring device suitable for high-viscosity fluid mixing of claim 1 is characterized in that the blade guide plates (3) are formed by cutting steel plates with certain thicknesses, the width is about 5-20cm, the thickness is about 3-10mm, 3-5 strips are arranged on each blade guide plate (3), and the blade guide plates (3) are vertically welded and connected with the quadric surface type blades (2).

4. The flow-guiding type stirring device suitable for mixing the high-viscosity fluid is characterized in that the wall surface flow guide plate (4) is formed by cutting a steel plate with a certain thickness, the width of the steel plate is 5-20cm, the thickness of the steel plate is 3-10mm, the inner wall surface of the stirring container (5) is welded in a spiral rising shape, the thread pitch is generally 1-2 times of the diameter of the quadric surface type blade (2), and the wall surface flow guide plate (4) is vertically welded with the inner wall surface of the stirring container (5).