A rotary mixing, stirring, aeration and gas dissolving device

Abstract

The utility model belongs to sewage treatment technical field discloses a kind of rotary mixing stirring aeration dissolving gas device, comprising: barrel assembly, with coaxial arrangement outer flow channel and inner flow channel;Spraying assembly is internally provided with injection flow channel;The import of the injection flow channel is communicated with the lower end of inner flow channel, and the outlet of the injection flow channel and the bottom of outer flow channel are spaced apart along axial direction with preset distance to form suction chamber;The injection flow channel is configured to first fluid from the inner flow channel is injected to the inner wall of outer flow channel along tangential direction upwards, to guide the first fluid spiral ascending along the inner wall of outer flow channel, and suction force is generated in the suction chamber, and the suction force is used to second fluid outside the barrel assembly is inhaled into the suction chamber through the bottom opening of outer flow channel and spiral ascending with first fluid;Fluid cutting assembly is set in the outer flow channel and is located above spraying assembly, for cutting mixing to the multiphase fluid of spiral ascending.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a swirling, stirring, aeration, and gas-dissolving device. Background Technology

[0002] In industrial applications such as aerobic biological treatment, anaerobic mixing, and slurry mixing in wastewater treatment, swirl or swirl mixing aeration devices are widely used. However, existing swirl mixing aeration devices typically employ an integrated, fixed structure, making it impossible to independently disassemble and replace the internal nozzle and cutting component systems. When the water quality changes during operation, or when the equipment experiences blockages, scaling, or wear after long-term operation, it often requires complete equipment replacement or cumbersome underwater disassembly and repair, resulting in high maintenance costs, significant operational risks, and long downtime. Furthermore, the gas-liquid mixing channel design of existing devices is relatively simple, making it difficult to adapt to the mixing and dissolved oxygen requirements of different media or treatment stages through simple component adjustments, thus limiting the equipment's adaptability and treatment efficiency. Utility Model Content

[0003] In view of this, in order to solve the problems mentioned in the background art, the purpose of this utility model is to provide a swirling mixing and aeration dissolving device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A swirling and mixing aeration dissolved air device, comprising: The cylindrical assembly has an outer flow channel and an inner flow channel arranged coaxially; The jetting assembly has an internal jetting channel; the inlet of the jetting channel is connected to the lower end of the inner channel, and the outlet of the jetting channel is axially spaced by a predetermined distance from the bottom of the outer channel to form a suction chamber; the jetting channel is configured to jet a first fluid from the inner channel tangentially upward to the inner wall of the outer channel to guide the first fluid to spiral upward along the inner wall of the outer channel and generate a suction force in the suction chamber, the suction force being used to draw a second fluid from outside the cylinder assembly into the suction chamber through the bottom opening of the outer channel and spiral upward with the first fluid; A fluid cutting component, disposed within the outer flow channel and located above the jetting component, is used to cut and mix the spirally rising first fluid and second fluid.

[0005] Preferably, the spray assembly has multiple spray channels evenly distributed along the circumferential direction; the outlet spray direction of each spray channel is either clockwise or counterclockwise.

[0006] Preferably, the jet channel is an arc-shaped channel, and the angle between the line connecting the center point of the inlet and the center point of the outlet of the arc-shaped channel and the horizontal plane is 0° to 45°, and the center point of the outlet is the highest point; When the line connecting the inlet and outlet centers of the arc-shaped flow channel is a standard circular arc, the central angle corresponding to the arc length at the inlet and outlet ends of the arc-shaped flow channel does not exceed 180°.

[0007] Preferably, the device further includes a cleaning locking assembly detachably connected to the bottom of the spray assembly; the cleaning locking assembly is configured to: block the bottom opening of the inner flow channel in the installed state, and expose the bottom opening of the inner flow channel in the disassembled state to form a fluid flushing channel flowing in the opposite direction through the inner flow channel.

[0008] Preferably, the fluid cutting assembly includes multiple layers of cutting elements stacked along the axial direction, wherein the projections of the cutting portions on adjacent layers of the cutting elements onto a plane perpendicular to the axis do not overlap.

[0009] Preferably, the cutting element has a ring-shaped structure, and the cutting portion is a protrusion disposed on the inner side of the ring-shaped structure and extending towards the center.

[0010] Preferably, the shape of the protrusion includes at least one of the following: mushroom head shape, hemispherical shape, frustum shape, bipyramidal shape, polyhedral shape, or rectangular plate shape; 6 to 12 of the protrusions are distributed on the inner side of each layer of the annular structure.

[0011] Preferably, the cylinder assembly includes an outer cylinder and a central guide pipe, with the upper end of the central guide pipe extending out of the outer cylinder; the outer flow channel is disposed between the outer cylinder and the central guide pipe, the inner flow channel is disposed inside the central guide pipe, and the injection assembly is detachably installed at the lower end of the central guide pipe.

[0012] Preferably, a seal is provided at the connection between the injection assembly and the central guide tube.

[0013] Preferably, the outer cylinder includes an upper cylinder and a lower cylinder connected sequentially along the axial direction; the ratio of the inner diameter of the upper cylinder to the inner diameter of the lower cylinder is 1:1 to 1:3. When the inner diameter of the upper cylinder is smaller than the inner diameter of the lower cylinder, a narrowing acceleration flow channel is formed inside the outer cylinder from bottom to top.

[0014] Preferably, a limiting component is connected between the outer cylinder and the central guide pipe to keep them coaxial and fixed; the limiting component includes an upper positioning member and a lower support member arranged sequentially from top to bottom, and the fluid cutting component is locked and fixed between the upper positioning member and the lower support member.

[0015] Preferably, the device further includes a bottom support member detachably connected to the bottom of the cylinder assembly; the vertical distance between the lowest end of the bottom support member and the lowest point of the outlet of the jet channel is less than 500 mm.

[0016] Compared with the prior art, this utility model has the following advantages: (1) This utility model provides a swirling mixing and aeration dissolving device, specifically a cylindrical assembly with a coaxial double-channel structure, and a stable spiral upward flow field is formed in the outer channel by the tangential high-speed airflow generated by the jet assembly, thereby generating negative pressure in the suction chamber to entrain external fluid, and then the fluid cutting assembly is used to forcibly shear and mix the gas-liquid-solid multiphase fluid, thereby ensuring that modular assembly of each structure is achieved while efficiently dissolving oxygen and stirring.

[0017] (2) In this utility model, the cylinder assembly includes an outer cylinder and a central guide pipe. The two are assembled by a limiting component, and the limiting component also locks and fixes the fluid cutting component between the upper positioning component and the lower support component. The spraying component is detachably installed at the lower end of the central guide pipe, which makes it more convenient to disassemble and repair the spraying component and the fluid cutting component.

[0018] (3) In this utility model, a detachable cleaning and locking component is provided. When the device is blocked or scaled, the cleaning and locking component can be removed to perform reverse flushing through the bottom opening of the inner flow channel, which significantly reduces the maintenance difficulty and downtime.

[0019] (4) In this utility model, the fluid cutting component includes multiple cutting parts stacked in a staggered manner along the axial direction, which effectively increases the collision frequency and effective contact area between the fluid and the cutting part during the rising process, thereby improving the breaking and refining effect of bubbles and the mixing uniformity of multiphase fluid. Attached Figure Description

[0020] Figure 1 This is an overall appearance drawing of the present utility model; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is a schematic diagram of the structure of a spray assembly according to this utility model; Figure 4 This is a schematic diagram of the structure of various spraying components with different structures in this utility model; Figure 5 These are schematic diagrams illustrating the structures of various fluid cutting components with different configurations in this utility model. Figure 6 These are schematic diagrams of various lower support components with different structures in this utility model; In the diagram: Cylinder assembly-1; Suction chamber-11; Outer cylinder-12; Upper cylinder-121; Lower cylinder-122; Central guide pipe-13; Spray assembly-2; Spray channel-21; Fluid cutting assembly-3; Cutting component-31; Cutting section-32; Cleaning and locking assembly-4; Sealing component-5; Upper positioning component-6; Lower support component-7; Bottom support component-8. Detailed Implementation

[0021] To further understand the content of this utility model, a detailed description of it is provided in conjunction with the accompanying drawings and embodiments. The structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art; they are not intended to limit the implementation of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to the embodiments of this application described herein.

[0022] like Figures 1-6 As shown, the present invention provides a swirling and mixing aeration dissolving device, which includes a cylinder assembly 1, a spray assembly 2, a fluid cutting assembly 3, a cleaning and locking assembly 4, a sealing component 5, an upper positioning component 6, a lower support component 7, and a bottom support component 8.

[0023] In one specific embodiment, the cylindrical assembly 1 has an outer flow channel and an inner flow channel arranged coaxially. Specifically, the cylindrical assembly 1 includes an outer cylinder 12 and a central guide pipe 13, with the upper end of the central guide pipe 13 extending out of the outer cylinder 12; the outer flow channel is disposed between the outer cylinder 12 and the central guide pipe 13, the inner flow channel is disposed inside the central guide pipe 13, and the injection assembly 2 is detachably installed at the lower end of the central guide pipe 13. The inner flow channel serves as a transport channel for a first fluid (such as compressed air, carbon dioxide, or fermentation exhaust gas, etc.) and extends vertically along the axis of the device; the outer flow channel surrounds the inner flow channel and serves as a working chamber for mixing, reacting, and lifting the gas-liquid-solid multiphase fluid.

[0024] In this embodiment, the outer cylinder 12 includes an upper cylinder 121 and a lower cylinder 122 connected sequentially along the axial direction, and the ratio of the inner diameter of the upper cylinder 121 to the inner diameter of the lower cylinder 122 is 1:1 to 1:3. The connection between the upper cylinder 121 and the lower cylinder 122 can be by thread, flange, socket, adhesive, heat fusion, welding, or other connection methods. Furthermore, when the ratio of the inner diameter of the upper cylinder 121 to the inner diameter of the lower cylinder 122 is 1:1, the upper cylinder 121 and the lower cylinder 122 can also be an integral structure. When the inner diameter of the upper cylinder 121 is smaller than the inner diameter of the lower cylinder 122, a narrowing acceleration flow channel is formed inside the outer cylinder 12 from bottom to top. When the multiphase fluid flows from the lower cylinder 122 with a larger cross-section into the upper cylinder 121 with a smaller cross-section, the fluid velocity will inevitably increase, resulting in a significant increase in fluid kinetic energy. This gives the solid particles and bubbles carried by the fluid a greater inertial impact force. When they collide with the fluid cutting component 3, they can generate stronger shear stress, promoting the breakup of large bubbles into microbubbles and the dispersion of sludge flocs. In addition, the local low-pressure zone formed by the narrowing structure also helps to further enhance the gas-liquid mixing effect.

[0025] It should be noted that during the assembly of the cylinder assembly 1, a limiting component is connected between the outer cylinder 12 and the central guide pipe 13 to keep them coaxial and fixed. Specifically, the limiting component includes an upper positioning member 6 and a lower support member 7 arranged sequentially from top to bottom, and the fluid cutting assembly 3 is locked and fixed between the upper positioning member 6 and the lower support member 7. For example, the upper positioning member 6 can be a pressure plate with a central hole, a lock nut, or a retaining ring, which applies axial preload by threaded engagement or bolt tightening; the lower support member 7 can be a support ring, a cross bracket, or a spoke plate welded or threaded to the inner wall of the outer cylinder 12, and its upper surface serves as the mounting reference surface of the fluid cutting assembly 3; thus, when replacing the fluid cutting assembly 3, it is only necessary to loosen the upper positioning member 6 to remove the worn fluid cutting assembly 3 for replacement.

[0026] In one embodiment, the upper positioning member 6 comprises a pressure plate with the same inner diameter as the upper cylinder 121. This pressure plate is screwed into the upper part of the central guide tube 13 via threads until it presses against the fluid cutting assembly 3 and securely fixes it inside the upper cylinder 121. The pressure plate and the upper cylinder 121 are fixed together by welding, hot melting, or clamping to ensure that the cylinder assembly 1 and the fluid cutting assembly 3 as a whole do not wobble. Regardless of whether the pressure plate is screwed into the upper part of the central guide tube 13 via threads or not, an additional nut-shaped locking device can be added to press against the fluid cutting assembly 3. The nut is screwed into the threaded central guide tube 13 to further press against the pressure plate. In this embodiment, the upper positioning member 6 comprises a pressure plate and a nut-shaped locking device.

[0027] In one embodiment, the lower support 7 includes an inner ring and an outer ring coaxially assembled. The outer ring is fitted and fixed to the inner wall of the outer cylinder 12, and the inner ring is sleeved and fixed to the outside of the central guide pipe 13 to support the lower part of the central guide pipe 13. Furthermore, a plurality of evenly distributed reinforcing ribs are provided between the inner ring and the outer ring, thereby forming a mounting reference surface supporting the fluid cutting assembly 3. For example, in... Figure 6 The structures shown illustrate configurations with 2, 3, 4, and 5 reinforcing ribs, respectively. Furthermore, the lower support 7 divides the upper cylinder 121 and the lower cylinder 122, meaning the lower support 7 can be adjusted upwards or downwards at the connection point between the upper cylinder 121 and the lower cylinder 122.

[0028] In one specific embodiment, the injection assembly 2 is detachably installed at the lower end of the central guide pipe 13, and a sealing element 5 is provided at the connection between the injection assembly 2 and the central guide pipe 13. Specifically, the injection assembly 2 and the central guide pipe 13 can be connected by various methods such as welding, threaded connection, hot melt, socket, adhesive, and top and bottom pressing. When the injection assembly 2 and the central guide pipe 13 are usually connected by detachable methods such as threads, flanges, or sockets, microscopic gaps inevitably exist between the mating surfaces. By providing a sealing element 5 at the connection interface, gas can be effectively prevented from escaping from the gaps at the connection, thereby effectively forcing all gas to be injected directionally through the preset injection channel 21. In practical applications, the sealing element 5 can be selected from various forms such as O-rings, polytetrafluoroethylene gaskets, metal spiral wound gaskets, or liquid sealants, depending on the temperature, pressure, and corrosiveness of the medium. For example, when treating oily wastewater or organic solvents, chemically resistant fluororubber O-rings are preferred; while in high-temperature slurry mixing scenarios, high-temperature resistant metal toothed gaskets can be used.

[0029] In this embodiment, the injection assembly 2 has multiple injection channels 21 evenly distributed along the circumferential direction, and the outlet injection direction of each injection channel 21 is either clockwise or counterclockwise. Figure 4The structures shown depict two, three, and four jet channels 21, respectively. Specifically, the inlet of each jet channel 21 is connected to the lower end of the inner channel, and the outlet of each jet channel 21 is axially spaced at a predetermined distance from the bottom of the outer channel to form a suction chamber 11. Each jet channel 21 is configured to tangentially spray a first fluid from the inner channel upwards onto the inner wall of the outer channel, guiding the first fluid to spiral upwards along the inner wall of the outer channel and generating a suction force within the suction chamber 11. This suction force is used to draw a second fluid from outside the cylinder assembly 1 into the suction chamber 11 through the bottom opening of the outer channel and spiral upwards with the first fluid.

[0030] Furthermore, the jet channel 21 is an arc-shaped channel, and the angle between the line connecting the center point of the inlet and the center point of the outlet of the arc-shaped channel and the horizontal plane is 0° to 45°, with the outlet center point being the highest point. Specifically, the inner cross-section of the arc-shaped channel can be triangular, circular, rectangular, elliptical, or other shapes depending on different requirements; for example, when processing high-solids-content slurry, a circular or elliptical cross-section can be used to reduce the risk of particle blockage and reduce nozzle wear; when the line connecting the inlet and outlet centers of the arc-shaped channel is a standard arc, the central angle corresponding to the arc length at the inlet and outlet ends of the arc-shaped channel does not exceed 180°, thereby ensuring that the airflow ejected from the jet channel 21 can spiral upward along the inner wall of the outer cylinder 12.

[0031] For example, the first fluid enters the jet assembly 2 from top to bottom through the central guide pipe 13. The first fluid is tangentially ejected through the arc-shaped jet channel 21 and impacts the inner wall of the lower cylinder 122 to form a rotating upward airflow. Then, it spirals upward along the inner wall of the outer cylinder 12. The density difference between the first fluid (airflow) and the liquid forms a suction force in the suction chamber 11 to suck up water flow and sludge particles from the outside of the lower cylinder 122 into the outer cylinder 12 and spiral upward. The first fluid and the second fluid collide with the fluid cutting assembly 3 to generate microbubbles, achieving uniform mixing of the two.

[0032] In one specific embodiment, the fluid cutting assembly 3 is disposed within the outer flow channel and located above the jet assembly 2, for cutting and mixing the spirally rising first fluid and the second fluid. Specifically, the fluid cutting assembly 3 includes multiple layers of cutting members 31 stacked along the axial direction, wherein the projections of the cutting portions 32 on adjacent layers of cutting members 31 onto a plane perpendicular to the axis do not overlap.

[0033] In actual assembly, the cutting parts 32 can be staggered in the axial projection by rotating the cutting parts 31 of adjacent layers around the axis by a preset angle (e.g., 30°, 45°, or 60°). This forces the fluid to constantly change its flow direction and repeatedly pass through the cutting zone during its ascent, thereby significantly increasing the collision frequency and shearing duration per unit height, and improving the mixing uniformity of the gas-liquid-solid three phases and the refinement of bubbles.

[0034] In one embodiment, the cutting element 31 has a ring-shaped structure, and the cutting portion 32 is a protrusion disposed on the inner side of the ring-shaped structure and extending towards the center. Specifically, the outer contour of the ring allows the cutting element 31 to fit tightly against the inner wall of the outer flow channel or be securely installed by a positioning element, preventing the fluid from bypassing the outer edge of the fluid cutting assembly 3; while the protrusion extending towards the center forms a radial disturbance structure inside the annular outer flow channel. When the spiraling fluid flows through this area, the protrusion not only directly impacts and shears the fluid, but also forces the fluid to be squeezed and accelerated in the centripetal direction. Subsequently, after flowing past the end of the protrusion, it diffuses outward under the action of centrifugal force, thereby realizing the alternating flow of radial contraction and radial expansion, thereby further enhancing the turbulence intensity and mass transfer efficiency.

[0035] In one embodiment, the shape of the protrusion includes at least one of the following: mushroom-shaped, hemispherical, frustum-shaped, bipyramidal, polyhedral, or rectangular plate-shaped, such as... Figure 5 As shown, from left to right, the examples are mushroom-shaped, hemispherical, bipyramidal, and rectangular plate-shaped protrusions. Specifically, different shapes of protrusions are suitable for different working media: mushroom-shaped and hemispherical protrusions have smooth surfaces and good streamlined shapes, resulting in lower fluid resistance and less slag buildup, making them particularly suitable for wastewater environments containing fibers, hair, or easily scaled substances, effectively reducing the risk of clogging; bipyramidal and polyhedral protrusions have sharp edges and corners, generating stronger local shear stress and micro-eddies, making them suitable for high-viscosity liquids or sparingly soluble gas systems requiring extreme bubble refinement; frustum-shaped protrusions combine shearing capacity and wear resistance, exhibiting a longer service life in scenarios with severe wear, such as high-solids-content slurry agitation. Furthermore, each layer of the annular structure preferably has 6 to 12 of these protrusions distributed on its inner side, thereby ensuring efficient cutting and mixing while maintaining low energy consumption and safety during device operation.

[0036] In one specific embodiment, the cleaning locking assembly 4 is detachably connected to the bottom of the spray assembly 2, and the cleaning locking assembly is configured to: block the bottom opening of the inner flow channel in the installed state, and expose the bottom opening of the inner flow channel in the disassembled state to form a fluid flushing channel that flows in the opposite direction through the inner flow channel.

[0037] In this embodiment, the cleaning locking assembly 4 is preferably connected to the bottom of the spray assembly 2 via a threaded connection. For example, the cleaning locking assembly 4 can be a plug or cap with external threads, and its top has a screw-in section that matches the internal thread at the bottom of the spray assembly 2. Of course, in other embodiments, this detachable connection can also be replaced by a flange bolt connection, a quick-release snap connection, or a clamp connection, as long as it allows for convenient disassembly and assembly. In the installed state, the upper end face of the cleaning locking assembly 4 or the built-in sealing gasket is in close contact with the bottom surface of the spray assembly 2, thereby forming a reliable axial seal on the bottom opening of the inner flow channel. This ensures that the high-pressure gas from the central guide pipe 13 can only be sprayed outward through the spray channel 21, without short-circuiting and leaking from the bottom gap, thus ensuring the stability of the negative pressure value in the suction chamber 11 and the efficiency of gas-liquid mixing.

[0038] When long-term operation of the device leads to sludge accumulation, mineral scaling, or biofilm adhesion inside the jet channel 21 or central guide pipe 13, maintenance personnel do not need to lift the entire device from the bottom of the pool or disassemble the cylinder assembly 1. They only need to loosen and remove the cleaning locking assembly 4 underwater or after it is brought to the surface, exposing the previously sealed bottom opening of the inner channel. At this time, the opening serves as a smooth reverse flushing inlet, and an external high-pressure cleaning water gun can be directly aimed at the opening to inject water into the inner channel. The water flow, in the opposite direction to the normal air intake, flushes the pipe wall of the central guide pipe 13 and the inner wall of the jet channel 21 from bottom to top. At the same time, the shearing force and carrying capacity of the water flow are used to peel off and discharge the attached dirt. It should be understood that although this embodiment focuses on the plug form of the threaded connection, in actual engineering, the cleaning locking assembly 4 can also be designed as a composite structure with a drain valve. That is, without completely disassembling the assembly, the valve can be opened to achieve periodic drainage and flushing with a small flow rate to meet the preventive maintenance needs under different water quality conditions.

[0039] In one specific embodiment, the bottom support 8 is detachably connected to the bottom of the cylinder assembly 1, and the vertical distance between the lowest end of the bottom support 8 and the lowest point of the outlet of the jet channel 21 is less than 500mm.

[0040] Specifically, the bottom support 8 is a key peripheral component that enables this invention to adapt to specific tank types such as oxidation ditches and sedimentation tanks. Structurally, the bottom support 8 may include a base plate and upwardly extending cylindrical supports or spoke-type legs, which are detachably connected to the bottom of the lower cylinder 122 of the cylindrical assembly 1 through threads, flanges, snaps, or welding. When applied to floating installation scenarios with large water depths or where bottom contact is not required, the bottom support 8 can be omitted. However, when applied to oxidation ditch scenarios with large thrust from the flow generator, large shear forces from the water flow, or where enhanced stirring of sludge at the bottom of the tank is required, the bottom support 8 is added to achieve stable bottom contact installation, preventing the device from shifting, tilting, or even tipping over under the impact of water flow, thereby effectively ensuring the structural safety of the device and connecting pipes.

[0041] In most secondary sedimentation tanks, oxidation ditches, or anaerobic tanks used for municipal sewage and industrial wastewater treatment, the thickness of the activated sludge or inert residue sedimentation layer at the bottom typically fluctuates between 200mm and 400mm. In this embodiment, the suction chamber 11 (formed by the outlet of the jet channel 21 and the bottom opening of the external channel) is controlled within 500mm of the tank bottom. This ensures that the negative pressure suction generated by the device directly covers the sludge sedimentation layer, thereby effectively entraining the dead sludge at the bottom into the cylinder assembly 1 using the shear force and suction force of the high-speed swirling flow. This fundamentally prevents sludge caking, anaerobic phosphorus release, or the generation of malodorous gases such as hydrogen sulfide. It should be understood that although this embodiment provides an upper limit constraint of less than 500mm, in actual engineering applications, this height value can be further optimized based on the sludge level monitoring data of the specific tank type. For example, in shallow sludge tanks, it is preferable to set it to 100mm to 300mm to achieve a more precise sludge removal effect.

[0042] In summary, this application, through the cooperation of the cleaning and locking components and the limiting components, forms a modular quick-release assembly structure based on axial clamping. This structure allows both the jetting component and the fluid cutting component to be independently disassembled and replaced or cleaned online, solving the problems of cumbersome maintenance and high cost of traditional integrated equipment. Furthermore, by limiting the bottom support height and coordinating the tangential jet flow channel, bubble breakage and multiphase fluid mixing are effectively achieved, significantly improving dissolved oxygen efficiency and mixing uniformity while ensuring low energy consumption.

[0043] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vortex mixing and aeration dissolved air device, characterized in that, include: The cylindrical assembly has an outer flow channel and an inner flow channel arranged coaxially; The jet assembly has a jet channel inside; the inlet of the jet channel is connected to the lower end of the inner channel, and the outlet of the jet channel is axially spaced at a predetermined distance from the bottom of the outer channel to form a suction chamber. The jet channel is configured to jet a first fluid from the inner channel tangentially upwards onto the inner wall of the outer channel to guide the first fluid to spiral upwards along the inner wall of the outer channel and generate a suction force in the suction chamber. The suction force is used to draw a second fluid from outside the cylinder assembly into the suction chamber through the bottom opening of the outer channel and spiral upwards with the first fluid. A fluid cutting component, disposed within the outer flow channel and located above the jetting component, is used to cut and mix the spirally rising first fluid and second fluid.

2. The vortex mixing and aeration dissolved air device according to claim 1, characterized in that: The spray assembly has multiple spray channels that are evenly spaced along the circumferential direction inside. The outlet jet direction of each of the jet channels is either clockwise or counterclockwise.

3. The vortex mixing and aeration dissolved air device according to claim 2, characterized in that: The jet channel is an arc-shaped channel, and the angle between the line connecting the center point of the inlet and the center point of the outlet of the arc-shaped channel and the horizontal plane is 0° to 45°, and the center point of the outlet is the highest point. When the line connecting the inlet and outlet centers of the arc-shaped flow channel is a standard circular arc, the central angle corresponding to the arc length at the inlet and outlet ends of the arc-shaped flow channel does not exceed 180°.

4. The vortex mixing and aeration dissolved air device according to claim 1, characterized in that: It also includes a cleaning and locking assembly, which is detachably connected to the bottom of the spray assembly; The cleaning locking assembly is configured to: block the bottom opening of the inner flow channel in the installed state, and expose the bottom opening of the inner flow channel in the disassembled state to form a fluid flushing channel that flows in the opposite direction through the inner flow channel.

5. The vortex mixing and aeration dissolved air device according to claim 1, characterized in that: The fluid cutting assembly includes multiple layers of cutting components stacked along the axial direction, wherein the projections of the cutting portions on adjacent layers of the cutting components onto a plane perpendicular to the axis do not overlap.

6. The vortex mixing and aeration dissolved air device according to claim 1, characterized in that: The cylindrical assembly includes an outer cylinder and a central guide pipe, with the upper end of the central guide pipe extending out of the outer cylinder; The outer flow channel is disposed between the outer cylinder and the central guide pipe, the inner flow channel is disposed inside the central guide pipe, and the injection assembly is detachably installed at the lower end of the central guide pipe.

7. The vortex mixing and aeration dissolved air device according to claim 6, characterized in that: A seal is provided at the connection between the injection assembly and the central guide tube.

8. The vortex mixing and aeration dissolved air device according to claim 6, characterized in that: The outer cylinder includes an upper cylinder and a lower cylinder connected sequentially along the axial direction; The ratio of the inner diameter of the upper cylinder to the inner diameter of the lower cylinder is 1:1 to 1:

3. When the inner diameter of the upper cylinder is smaller than the inner diameter of the lower cylinder, a narrowing acceleration flow channel is formed inside the outer cylinder from bottom to top.

9. The vortex mixing and aeration dissolved air device according to claim 6, characterized in that: A limiting component is connected between the outer cylinder and the central guide tube to keep them coaxial and fixed. The limiting component includes an upper positioning member and a lower support member arranged sequentially from top to bottom, and the fluid cutting component is locked and fixed between the upper positioning member and the lower support member.

10. The vortex mixing and aeration dissolved air device according to claim 1, characterized in that: It also includes a bottom support member, which is detachably connected to the bottom of the cylindrical assembly; The vertical distance between the lowest point of the bottom support and the lowest point of the jet channel outlet is less than 500 mm.

Images