Efficient gas-liquid dispersion stirrer

Abstract

A high-efficiency gas-liquid dispersion stirrer comprises a disc and a plurality of blades uniformly distributed on the periphery of the disc, the blades comprise upper blades and lower blades which are arranged in a split mode, the upper blades and the lower blades form a V-shaped dispersion groove which is consistent with the rotation direction of the disc, and the diameters of the two ends of the dispersion groove are gradually increased from inside to outside. A small opening with a gap is formed in one side, with a smaller caliber, of the dispersion groove, and a large opening with a larger caliber is formed in the other side of the dispersion groove. When the stirrer runs and compressed air passes through a rotation area of the stirrer, the compressed air is sucked into air holes generated when the backs of the V-shaped blades run, and when the air holes are exploded under the action of centrifugal force, the air holes in the backs of the blades become smaller due to inflow of liquid in gaps at small openings of the blades, so that the blades are driven to rotate. Therefore, the cavitation can be more favorably divided into a plurality of fine bubbles, the contact surface area of the bubbles and liquid is greatly increased, and the gas-liquid dispersing capacity of the stirrer and the dissolved oxygen rate of a medium are more effectively improved.

Description

Technical Field

[0001] This utility model relates to a high-efficiency gas-liquid dispersion stirrer, belonging to the field of stirrers. Background Technology

[0002] In existing ventilated mixing systems, there are often one or more agitators for gas-liquid dispersion. When compressed air passes through the rotating area of ​​the agitator, the cavitation generated by the movement of the blades causes the compressed air to be drawn into the cavitation. When the cavitation bursts due to centrifugal force, it breaks into many tiny bubbles, which greatly increases the surface area of ​​the bubbles in contact with the liquid, thereby greatly improving the dissolved oxygen rate. However, this type of agitator is a radial flow agitator. Although it has strong gas-liquid dispersion ability, it consumes a lot of power. At the same time, the blades need to be processed using special molds, which makes the processing difficult, costly, and time-consuming, which is not conducive to improving production efficiency and quality. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a high-efficiency gas-liquid dispersion mixer.

[0004] A high-efficiency gas-liquid dispersion mixer includes a disc and several blades evenly distributed around the outer periphery of the disc. Each blade comprises a separate upper blade and a lower blade, which form a V-shaped dispersion groove aligned with the rotation direction of the disc. The diameter of the dispersion groove gradually increases from the inside to the outside. A small opening with gaps is formed on the side with a smaller diameter, while a larger opening is formed on the other side. During operation, when compressed air passes through the rotating area of ​​the mixer, the cavitation generated on the back of the V-shaped blades draws the compressed air into the cavitation. As the cavitation bursts due to centrifugal force, the gaps at the small openings of the blades also decrease due to the inflow of liquid, further reducing the size of the cavitation on the back of the blades. This facilitates the separation of the cavitation into numerous tiny bubbles, significantly increasing the surface area of ​​contact between the bubbles and the liquid, thereby more effectively improving the gas-liquid dispersion capacity of the mixer and the dissolved oxygen rate of the medium.

[0005] Preferably, the dispersion tank is provided with a plurality of vertically arranged reinforcing support blocks, which are spaced apart on one side near the edge of the large opening of the dispersion tank. As internal support components of the dispersion tank, the reinforcing support blocks can resist centrifugal force and impact force when the agitator rotates at high speed, effectively preventing deformation or excessive vibration of the dispersion tank and ensuring the rigidity and stability of the tank body. The arrangement of the support blocks can create several micro-perturbation flow fields within the dispersion tank, allowing bubbles to be more uniformly guided and dispersed before entering the large opening, avoiding concentrated release of bubbles at the large opening, thereby further optimizing the gas-liquid mixing effect. By distributing part of the force through the support blocks within the dispersion tank, the fatigue load on the impeller and tank body is reduced, lowering the risk of material fatigue cracks during long-term operation and improving the durability and reliability of the agitator.

[0006] Preferably, the upper impeller extends further outward than the lower impeller, and the outer edges of both the upper and lower impellers are inclined. The longer extension and inclined arrangement of the upper impeller create a larger flow coverage area in the liquid, while also extending the residence time of the gas in the liquid, guiding more liquid into the dispersion tank, and facilitating full contact between bubbles and liquid over a wider area, thus improving dispersion efficiency. Because the upper impeller extends further, the shear force gradient generated by its interaction with the lower impeller is more pronounced, enabling the bubbles to be graded and refined at different radial positions, forming a more uniform bubble size distribution, thereby increasing the dissolved oxygen rate. The relatively shorter lower impeller reduces the resistance of the liquid at the bottom of the tank and unnecessary turbulent areas, balancing the overall fluid resistance distribution and further reducing system power consumption while ensuring dispersion effectiveness. By simply adjusting the length ratio of the upper and lower impellers, the dispersion intensity and power requirements can be flexibly controlled, allowing for rapid switching between different performance specifications during production without complex mold modifications, improving manufacturing and debugging efficiency.

[0007] Furthermore, several blade fixing blocks are spaced apart between the upper and lower blades. The blade connecting blocks are vertically arranged, with both ends fixed to the outer walls of the upper and lower blades respectively, thus connecting the upper and lower blades integrally. The blade fixing blocks tightly integrate the upper and lower blades, allowing them to work together to resist centrifugal force and load, preventing structural loosening or failure caused by relative slippage or torsion. This ensures the stability of the dispersion tank shape and improves the consistency and reliability of gas-liquid dispersion.

[0008] Preferably, the upper impeller is fixedly connected to the disc by bolts via an impeller connecting block. The bolted connection structure is simple and intuitive; assembly or disassembly can be completed simply by tightening or loosening the bolts between the upper impeller and the disc, significantly reducing on-site maintenance and component replacement time. The radial position and angle of the upper impeller can be adjusted via bolts to optimize the alignment and gap dimensions of the dispersion tank, ensuring optimal gas-liquid dispersion.

[0009] Furthermore, the blade connecting block is vertically provided with reinforcing ribs that connect to the outer wall of the upper blade, and the reinforcing ribs are located close to the inner side of the upper blade. Through the reinforcement effect of the reinforcing ribs, the connection between the upper and lower blades and the connecting block is more compact, further preventing relative slippage and loosening, and ensuring the stability of the V-shaped dispersion groove shape during long-term operation.

[0010] The beneficial effects of this invention are as follows: When the agitator is running, when compressed air passes through the rotating area of ​​the agitator, the air cavitation generated by the back of the V-shaped blades causes the compressed air to be drawn into the air cavitation. When the air cavitation bursts due to centrifugal force, the gap at the small opening of the blades also becomes smaller due to the inflow of liquid. This is more conducive to dividing the air cavitation into many tiny bubbles, which greatly increases the surface area of ​​the bubbles in contact with the liquid, thereby more effectively improving the gas-liquid dispersion ability of the agitator and the dissolved oxygen rate of the medium. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of 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 some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0012] Figure 1 This is a top view of the structure of this utility model;

[0013] Figure 2 This is a side view structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the blade structure in this utility model;

[0015] In the diagram, 1 is a disc; 2 is an upper blade; 3 is a lower blade; 4 is a dispersion groove; 41 is a small opening; 42 is a gap; 43 is a large opening; 5 is a reinforcing support block; 6 is a blade fixing block; 7 is a blade connecting block; and 8 is a reinforcing rib. Detailed Implementation

[0016] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0017] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0018] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] like Figure 1-3 The illustration shows an embodiment of a high-efficiency gas-liquid dispersion mixer of this invention. It includes a disc 1 and several blades evenly distributed around the outer periphery of the disc 1. Each blade includes a separate upper blade 2 and a lower blade 3. The upper blade 2 and lower blade 3 form a V-shaped dispersion groove 4 aligned with the rotation direction of the disc 1. The diameter of the dispersion groove 4 gradually increases from the inside to the outside. A small opening 41 with a gap 42 is formed on the side with a smaller diameter, while a large opening 43 with a larger diameter is formed on the other side. During operation, when compressed air passes through the rotating area of ​​the mixer, the cavitation generated on the back of the V-shaped blades causes the compressed air to be drawn into the cavitation. As the cavitation bursts due to centrifugal force, the gap at the small opening 41 of the blades also shrinks due to the inflow of liquid. This further facilitates the separation of the cavitation into many tiny bubbles, greatly increasing the surface area of ​​contact between the bubbles and the liquid, thereby more effectively improving the gas-liquid dispersion capacity of the mixer and the dissolved oxygen rate of the medium.

[0020] In this embodiment, unlike the previous embodiment, the dispersion tank 4 is provided with several vertically arranged reinforcing support blocks 5, which are spaced apart on one side near the edge of the large opening 43 of the dispersion tank 4. As internal support components of the dispersion tank 4, the reinforcing support blocks 5 can resist centrifugal force and impact force when the agitator rotates at high speed, effectively preventing deformation or excessive vibration of the dispersion tank 4 and ensuring the rigidity and stability of the tank. The support blocks can create several micro-perturbation flow fields within the dispersion tank 4, allowing bubbles to be more uniformly guided and dispersed before entering the large opening 43, avoiding concentrated release of bubbles at the large opening 43, thereby further optimizing the gas-liquid mixing effect. By sharing some of the force with the support blocks within the dispersion tank 4, the fatigue load on the impeller and tank body is reduced, lowering the risk of material fatigue cracks during long-term operation and improving the durability and reliability of the agitator.

[0021] In this embodiment, unlike the previous embodiment, the upper blade 2 extends longer than the lower blade 3, and the outer edges of both blades are inclined. The longer extension and inclined arrangement of the upper blade 2 create a larger flow coverage area in the liquid, extending the residence time of the gas and guiding more liquid into the dispersion tank 4. This facilitates full contact between the bubbles and the liquid over a wider area, improving dispersion efficiency. Because the upper blade 2 extends further, the shear force gradient generated by its interaction with the lower blade 3 is more pronounced, enabling the bubbles to be graded and refined at different radial positions, resulting in a more uniform bubble size distribution and thus increasing the dissolved oxygen rate. The relatively shorter lower blade 3 reduces resistance and unnecessary turbulence areas in the lower part of the tank, balancing the overall fluid resistance distribution and further reducing system power consumption while ensuring dispersion effectiveness. By simply adjusting the length ratio of the upper and lower blades 3, dispersion intensity and power requirements can be flexibly controlled. Different performance specifications can be quickly switched during production without complex mold modifications, improving manufacturing and debugging efficiency.

[0022] In this embodiment, unlike the previous embodiment, a plurality of blade fixing blocks 6 are spaced apart between the upper blade 2 and the lower blade 3. The blade connecting block 7 is vertically arranged, with both ends fixed to the outer walls of the upper blade 2 and the lower blade 3, thus connecting the upper blade 2 and the lower blade 3 integrally. The blade fixing blocks 6 tightly integrate the upper and lower blades 3, allowing the upper and lower blades to work together to resist centrifugal force and load, avoiding structural loosening or failure caused by relative slippage or torsion, thereby ensuring the stability of the shape of the dispersion tank 4 and improving the consistency and reliability of gas-liquid dispersion.

[0023] The upper blade 2 is fixedly connected to the disc 1 by bolts via the blade connecting block 7. The bolt connection structure is simple and intuitive; assembly or disassembly can be completed simply by tightening or loosening the bolts between the upper blade 2 and the disc 1, significantly reducing the time required for on-site maintenance and component replacement. The radial position and angle of the upper blade 2 can be adjusted via bolts to optimize the alignment of the dispersion tank 4 and the size of the gap 42, ensuring the best gas-liquid dispersion effect.

[0024] In this embodiment of the application, unlike the embodiments described above, a reinforcing rib 8 is vertically provided on the blade connecting block 7 and connected to the outer wall of the upper blade 2. The reinforcing rib 8 is located close to the inner side of the upper blade 2. Through the reinforcement effect of the reinforcing rib 8, the connection between the upper and lower blades 3 and the connecting block is more compact, further preventing relative slippage and loosening, and ensuring the stability of the V-shaped dispersion groove 4 shape during long-term operation.

[0025] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0026] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A high-efficiency gas-liquid dispersion stirrer, characterized in that: It includes a disk and several blades evenly distributed around the outer periphery of the disk. The blades include an upper blade and a lower blade that are separately arranged. The upper blade and the lower blade form a dispersion groove that is V-shaped and aligned with the rotation direction of the disk. The diameter of the dispersion groove gradually increases from the inside to the outside. A small opening with a gap is formed on the side with a smaller diameter of the dispersion groove, and a large opening with a larger diameter is formed on the other side.

2. The high-efficiency gas-liquid dispersion stirrer as described in claim 1, characterized in that: The dispersion groove is provided with a number of vertically arranged reinforcing support blocks, which are spaced apart on one side near the edge of the large opening of the dispersion groove.

3. The high-efficiency gas-liquid dispersion stirrer as described in claim 1, characterized in that: The upper blade extends to the outside in a length longer than the lower blade, and the outer edges of the upper and lower blades are inclined.

4. The high-efficiency gas-liquid dispersion stirrer as described in claim 1 or 3, characterized in that: Several blade fixing blocks are spaced apart between the upper blade and the lower blade. The blade connecting block is vertically arranged and its two ends are fixed to the outer walls of the upper blade and the lower blade respectively, so that the upper blade and the lower blade are connected as a whole.

5. The high-efficiency gas-liquid dispersion stirrer as described in claim 1, characterized in that: The upper blade is fixedly connected to the disc by a blade connecting block bolt.

6. The high-efficiency gas-liquid dispersion stirrer as described in claim 5, characterized in that: The blade connecting block is vertically provided with reinforcing ribs that are connected to the outer wall of the upper blade, and the reinforcing ribs are located close to the inner side of the upper blade.

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