Stirring blade for processing hollow fiber membrane

Abstract

The utility model relates to the technical field of hollow fiber membrane processing equipment, in particular to a stirring paddle for processing a hollow fiber membrane, which comprises a main shaft, the main shaft is provided with at least two groups of stirring components, and each stirring component comprises an outer helical ribbon relatively far away from the main shaft and an inner helical ribbon relatively close to the main shaft. The rotating diameter of the outer helical ribbon is larger than that of the inner helical ribbon, and the helical directions of the outer helical ribbon and the inner helical ribbon are opposite. As the design of the inner helical ribbon and the outer helical ribbon is adopted and the angle directions of the inner helical ribbon and the outer helical ribbon are opposite, a feed liquid central area which is basically positioned in a'dead zone 'can be active, and the auxiliary shafts on the stirring shaft adopt the crossed design, on one hand, connection with the inner helical ribbon and the outer helical ribbon is facilitated, and on the other hand, a certain dispersion effect is achieved during powder feeding and mixing; a gap is reserved between the inner helical ribbon and the main shaft instead of being completely attached to the main shaft, so that the flowing of feed liquid and the vortex type turning effect in the stirring process are facilitated, and the stirring efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hollow fiber membrane processing equipment technical field especially, it relates to a stirring paddle for hollow fiber membrane processing. BACKGROUND

[0002] In the production process of hollow fiber membrane, the state and uniformity of the prepared spinning solution mixture have important significance for the quality and stability of the produced membrane filaments, with the continuous improvement of water quality discharge standards, higher requirements are put forward for the performance and treatment effect of membrane materials used for water purification and water separation, under this background, compared with the large flux membrane filaments in earlier years, now more uniform pore size distribution, higher filtration precision and higher filtration layer strength are needed, and the viscosity of the spinning solution is also getting bigger, which requires a higher device for mixing and stirring.

[0003] In order to solve the effective stirring and uniform mixing of the high viscosity solution, some spiral or anchor type stirring paddles are used, but the actual stirring effect is not good, and the single spiral stirring method can make the spinning solution move along the rotation direction of the spiral, but the center of the solution is in a relatively static state, it is difficult to rely on the diffusion of the high viscosity solution itself to realize uniform mixing, and the passive increase of mixing time will also increase the production cost, therefore, it has certain practical significance to design a stirring paddle that can meet the mixing of high viscosity solution of filter membrane. SUMMARY

[0004] Therefore, the utility model discloses a stirring paddle for hollow fiber membrane processing, which can solve the technical problem that the existing stirring paddle for hollow fiber membrane processing cannot quickly and fully mix the solution.

[0005] In order to solve the effective stirring and uniform mixing of the high viscosity solution, some spiral or anchor type stirring paddles are used, but the actual stirring effect is not good, and the single spiral stirring method can make the spinning solution move along the rotation direction of the spiral, but the center of the solution is in a relatively static state, it is difficult to rely on the diffusion of the high viscosity solution itself to realize uniform mixing, and the passive increase of mixing time will also increase the production cost, therefore, it has certain practical significance to design a stirring paddle that can meet the mixing of high viscosity solution of filter membrane.

[0006] As a preferred technical scheme of the utility model, the height of the outer spiral and the inner spiral is consistent.

[0007] As the preferred technical scheme of the utility model, the stirring paddle further comprises a first auxiliary shaft provided at the circumferential surface of the main shaft, the first auxiliary shaft has multiple and is arranged along the axial line direction of the main shaft to form a cross structure along the axial line direction of the main shaft, and the outer spiral belt and the inner spiral belt are fixed through the cross structure.

[0008] As the preferred technical scheme of the utility model, the lower end of the main shaft is provided with a horizontal plate, the horizontal plate extends along the radial direction of the main shaft and is bent to form a multi-segment linear structure, and the horizontal plate is fixedly connected with the outer spiral belt at the end away from the main shaft.

[0009] As the preferred technical scheme of the utility model, the lower end of the main shaft is provided with a second auxiliary shaft, and the second auxiliary shaft is fixedly connected with the inner spiral belt.

[0010] As the preferred technical scheme of the utility model, the rotation axial lines of the main shaft, the inner spiral belt and the outer spiral belt coincide.

[0011] As the preferred technical scheme of the utility model, the inner spiral belt is fixedly welded with the first auxiliary shaft and the second auxiliary shaft, and the outer spiral belt is fixedly welded with the first auxiliary shaft and the horizontal plate.

[0012] As the preferred technical scheme of the utility model, the number of the stirring assemblies is two groups, and the two groups of stirring assemblies are arranged symmetrically about the main shaft, and the inner spiral belts of the two groups of stirring assemblies form a double helix structure in the shape of DNA.

[0013] The utility model has the advantages of:

[0014] 1. The inner spiral belt and the outer spiral belt are designed to ensure that the angles of the two are opposite, so that the center area of the material liquid which is basically in the "dead zone" is activated, the auxiliary shaft on the stirring shaft adopts a cross design, which is convenient for connection with the inner and outer spiral belts and plays a certain dispersing role when the powder is added and mixed, the inner spiral belt is designed to have a gap with the main shaft instead of being completely attached, which is beneficial to the flow of the material liquid and the generation of "vortex" effect during the stirring process, the material liquid moves along the spiral belt and "flows out" from the gap of the spiral belt, forming a tangential force, so that the powder is pressed into the solution more quickly, and the stirring efficiency is improved.

[0015] 2. The inner spiral belt adopts a double helix structure similar to DNA, and the counter-tangential force of this structure is more obvious compared with a single spiral belt, the outer spiral belt has a larger centrifugal force, and the inner spiral belt generates a larger counter-tangential force to cause "collision" between the two, so that the mixing of the material liquid is more effective, the bottom of the outer spiral belt adopts a horizontal structure with a certain angle, which cooperates with the tangential force during the operation of the whole outer spiral belt to bring a positive stirring force to the whole material liquid from bottom to top, thereby avoiding uneven stirring of the upper and lower layers. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the installation structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 3 This is a side view of the structure of this utility model;

[0020] Figure 4 This is a top view of the structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the upper three-dimensional structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the lower three-dimensional structure of this utility model.

[0023] The markings in the diagram are: 1. Main shaft; 2. First auxiliary shaft; 3. First outer threaded band; 4. Horizontal plate; 5. Second outer threaded band; 6. First inner threaded band; 7. Second inner threaded band; 8. Second auxiliary shaft. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0025] It should be noted that, unless otherwise defined, technical terms or scientific terms used in the present application should be understood as the common meaning understood by those with ordinary skills in the field to which the present application belongs. In the present application, "first", "second" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , a kind of hollow fiber membrane processing stirring paddle, including spindle 1, spindle 1 is provided with two groups of stirring components, and two groups of stirring components are arranged about spindle 1 axis symmetry, stirring component includes one relatively far away from the outer spiral band of spindle 1 and one relatively close to the inner spiral band of spindle 1, specifically first outer spiral band 3, second outer spiral band 5, first inner spiral band 6 and second inner spiral band 7, the rotating diameter of outer spiral band is greater than the rotating diameter of inner spiral band, the spiral direction of outer spiral band and inner spiral band is opposite, inner spiral band keeps distance between its side close to spindle 1 and the outer circumferential surface of spindle 1, to form the gap for feed liquid and powder flow, when outer spiral band and inner spiral band follow spindle 1 rotation, the helical surface of outer spiral band and inner spiral band can respectively exert force of opposite direction movement to liquid, to promote the liquid of opposite direction movement to collide in stirring container and cause to churn, liquid flows out through gap to produce tangential force to press powder into solution, preferably, the height of outer spiral band and inner spiral band is consistent;The rotating axis of spindle 1 and inner spiral band, outer spiral band is coincident;

[0027] The above technical solution can quickly and thoroughly mix the raw materials and solution in the feed liquid. During use, the stirring blades are installed inside the mixing vessel, and the main shaft 1 is connected to the output shaft of the drive motor. Starting the drive motor causes the main shaft 1 to rotate, which in turn causes the inner and outer spiral ribbons on its surface to rotate synchronously. Since the spiral directions of the inner and outer spiral ribbons are completely opposite, during the stirring process, the feed liquid moves and mixes along the spiral surfaces of the inner and outer spiral ribbons, resulting in two streams of feed liquid moving in opposite directions within the mixing vessel. Because the outer spiral ribbon has a greater centrifugal force, while the inner spiral ribbon generates a greater centrifugal force... The large counter-tangential force causes the two to "collide", making the mixing of the liquid more effective. The inner spiral ribbon design leaves a gap between itself and the main shaft 1 instead of being completely fitted. This is more conducive to the flow of the liquid during the stirring process and to the generation of a "vortex" effect. Due to the action of the inner spiral ribbon, the liquid moves with the inner spiral ribbon on the one hand, and "flows out" from the gap between the inner spiral ribbon and the main shaft 1 on the other hand, forming a tangential force, which makes the powder press into the solution more quickly, improves the stirring efficiency, and can activate the central area of ​​the liquid that is basically in the "dead zone", improve the stirring effect and shorten the stirring time.

[0028] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the stirring blade also includes a first auxiliary shaft 2 with one end disposed on the circumferential surface of the main shaft 1. The first auxiliary shaft 2 has multiple shafts and is arranged to rotate and spaced along the axial direction of the main shaft 1, so that the first auxiliary shaft 2 forms a cross-shaped structure along the axial direction of the main shaft 1. The cross-shaped structure is used to fix the outer and inner spiral ribbons. A second auxiliary shaft 8 is disposed at the lower end of the main shaft 1, and the second auxiliary shaft 8 is fixedly connected to the inner spiral ribbon.

[0029] The above technical solution improves the mixing effect. Specifically, the auxiliary shaft on the main shaft 1 adopts a cross-shaped design, which facilitates the connection with the inner and outer spiral ribbons on the one hand, and plays a certain dispersing role when the powder is added and mixed on the other hand.

[0030] like Figure 2 , Figure 5 and Figure 6 As shown, in this embodiment, a horizontal plate 4 is provided at the lower end of the main shaft 1. The horizontal plate 4 extends along the radial direction of the main shaft 1 and is bent to form a multi-segment linear structure. The horizontal plate 4 is fixedly connected to the external thread at its end away from the main shaft 1.

[0031] The above technical solution makes the mixing more uniform. The bottom of the outer spiral ribbon adopts a horizontal structure with a certain angle, namely the horizontal plate 4, which can work with the tangential force when the entire outer spiral ribbon is running to bring positive stirring force to the entire liquid from bottom to top, avoiding uneven mixing between the upper and lower layers.

[0032] like Figure 2 , Figure 5 andFigure 6 As shown in the embodiment, the inner spiral bands are welded and fixed with the first auxiliary shaft 2 and the second auxiliary shaft 8 respectively, and the outer spiral bands are welded and fixed with the first auxiliary shaft 2 and the horizontal plate 4 respectively.

[0033] The whole stirring blade is integrated by using the technical scheme, and the connection strength of the structure is improved.

[0034] As shown in the embodiment, the inner spiral bands of the two groups of stirring assemblies form a double helix structure in the shape of DNA. Figure 2 and Figure 3 As shown in the embodiment, the inner spiral bands of the two groups of stirring assemblies form a double helix structure in the shape of DNA.

[0035] The technical scheme further improves the mixing effect of the material liquid, the inner spiral band adopts a double helix structure similar to DNA, and compared with a single spiral band, the counter-tangential force of this structure is more obvious. Since the centrifugal force of the outer spiral band is larger, and the inner spiral band generates greater counter-tangential force, the two occur "collision", and the mixing of the material liquid will be more effective.

[0036] Working principle: in use, the driving motor is started to drive the main shaft 1 to rotate, which drives the inner and outer spiral bands on the surface to rotate synchronously. Since the spiral directions of the inner and outer spiral bands are completely opposite, during stirring, the material liquid moves and mixes along the spiral surfaces of the inner and outer spiral bands, so that two streams of material liquid with opposite directions are generated in the stirring tank. Since the centrifugal force of the outer spiral band is larger, and the inner spiral band generates greater counter-tangential force, the two occur "collision", and the mixing of the material liquid will be more effective. The inner spiral band is designed to have a gap between the main shaft 1 rather than being completely attached, which is more conducive to the flow of the material liquid and the formation of "vortex type" turbulence effect during stirring. Due to the action of the inner spiral band, the material liquid moves with the inner spiral band and "flows out" from the gap between the inner spiral band and the main shaft 1, forming a tangential force, so that the powder is pressed into the solution faster, improving the stirring efficiency, and making the material liquid in the center area which is basically in the "dead zone" active, improving the stirring effect and shortening the stirring time.

[0037] In summary, this design structure is more suitable for high-viscosity spinning material liquid, and has higher efficiency. The gradual dissolution of the powder will cause the rapid rise of the viscosity of the material liquid, which will bring certain difficulties to the subsequent redissolution of the powder. The design of the inner and outer spiral bands in opposite directions and with a certain inclination angle will make the powder quickly mixed into the solution, avoiding the problems of powder agglomeration and floating on the surface.

[0038] Those skilled in the art will understand that the above discussion of any of the embodiments is merely exemplary in nature and is not intended to imply that the scope of the present application, including the claims, is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0039] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations are intended to be encompassed by the appended claims.

Claims

1. A stirring blade for hollow fiber membrane processing comprising a main shaft (1), characterized by, The main shaft (1) is provided with at least two groups of stirring assemblies, the stirring assembly comprises an outer screw belt relatively far away from the main shaft (1) and an inner screw belt relatively close to the main shaft (1), the rotating diameter of the outer screw belt is larger than that of the inner screw belt, the spiral directions of the outer screw belt and the inner screw belt are opposite, the inner screw belt keeps a distance between its side close to the main shaft (1) and the outer circumferential surface of the main shaft (1) to form a gap for the flow of the liquid and the powder, when the outer screw belt and the inner screw belt rotate with the main shaft (1), the spiral surfaces of the outer screw belt and the inner screw belt can respectively exert force on the liquid in opposite directions to cause the liquid in opposite directions to collide in the stirring container to generate turbulence, and the liquid flows out through the gap to generate a tangential force to press the powder into the solution.

2. The hollow fiber membrane processing impeller blade according to claim 1, characterized by, The height of the outer screw belt is consistent with that of the inner screw belt.

3. The hollow fiber membrane processing impeller blade according to claim 1, characterized by, The stirring paddle further comprises a first auxiliary shaft (2) provided at one end of the circumferential surface of the main shaft (1), the first auxiliary shaft (2) has a plurality of and is arranged in a rotating and spaced manner along the axial direction of the main shaft (1), so that the first auxiliary shaft (2) forms a cross-shaped structure along the axial direction of the main shaft (1), and the outer screw belt and the inner screw belt are fixed through the cross-shaped structure.

4. The hollow fiber membrane processing impeller blade according to claim 3, characterized by, The lower end of the main shaft (1) is provided with a horizontal plate (4) extending in the radial direction of the main shaft (1) and bent to form a multi-segment linear structure, and the horizontal plate (4) is fixedly connected with the outer screw belt at one end away from the main shaft (1).

5. The hollow fiber membrane processing impeller blade according to claim 4, characterized by, The lower end of the main shaft (1) is provided with a second auxiliary shaft (8), and the second auxiliary shaft (8) is fixedly connected with the inner screw belt.

6. The stirring blade for hollow fiber membrane processing according to any one of claims 1 to 5, characterized by The rotating axial lines of the main shaft (1), the inner screw belt and the outer screw belt coincide.

7. The hollow fiber membrane processing impeller blade according to claim 5, characterized by, The inner screw belt is respectively welded and fixed with the first auxiliary shaft (2) and the second auxiliary shaft (8), and the outer screw belt is respectively welded and fixed with the first auxiliary shaft (2) and the horizontal plate (4).

8. The hollow fiber membrane processing impeller blade according to claim 6, characterized by, The number of the stirring assemblies is two groups, and the two groups of stirring assemblies are arranged in axial symmetry about the main shaft (1), and the inner screw belts of the two groups of stirring assemblies form a double helix structure in the shape of DNA.

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