Novel tubular ceramic membrane air dissolving device and rotational flow air flotation system

Abstract

The invention provides a novel tubular ceramic membrane air dissolving device and a rotational flow air flotation system.The air dissolving device comprises a plurality of air dissolving modules installed between an upper array plate and a lower array plate, each air dissolving module comprises an outer pipe and a ceramic membrane inner pipe, the outer pipe wraps the ceramic membrane inner pipe, the ceramic membrane inner pipe is provided with an air inlet communicated with an air inlet pipeline of the lower array plate, and the air inlet pipeline is communicated with an air outlet pipeline of the lower array plate; the upper and lower ends of the outer pipe are respectively provided with a water inlet and a dissolved air water outlet, the ceramic membrane inner pipe is hollow, and the pipe wall is provided with a plurality of micro-channels. The rotational flow air flotation system comprises a water inlet pipeline, a dosing device, a pipeline mixer, a reaction tank and the like, sewage enters the reaction tank after being mixed with a coagulant aid, and pollutants float upwards and are discharged under the action of microbubbles. The device has the characteristics of compact structure, simplicity and convenience in operation, low maintenance cost, high adaptability and the like, is suitable for sewage treatment of different scales, effectively improves the sewage treatment efficiency, and provides a new thought and technical route for the technical field of air floatation and air dissolution.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a novel tubular ceramic membrane dissolved air device and a cyclone flotation system. Background Art

[0002] In the modern water treatment industry, the air flotation dissolved air system is an important sewage treatment technology. It dissolves air in water to form tiny bubbles, which are combined with suspended particles or oil substances in sewage and float to the water surface, thereby achieving solid-liquid separation. High-precision dissolved air technology is crucial to improving the efficiency and quality of air flotation. Currently, this process is mainly completed by dissolved air pumps.

[0003] As a high-precision device, the dissolved air pump plays a key role in the dissolved air process. However, traditional dissolved air pumps have some significant limitations and challenges:

[0004] Cavitation damage problem: The paddles inside the dissolved air pump are susceptible to cavitation. When the gas in the liquid suddenly condenses into bubbles and quickly bursts, it will produce a local high-pressure shock, causing erosion on the paddle surface, which will lead to a gradual decrease in the dissolved air effect.

[0005] Pollution risk: Due to the need to treat sewage with complex components, the dissolved air pump itself may be contaminated by pollutants that are difficult to treat, which not only affects the normal operation of the equipment, but also increases maintenance costs.

[0006] Economic considerations: The manufacturing process of dissolved air pumps is complex and expensive, especially those that can stably meet the standards. There are very few suppliers in the domestic market, which leads to high prices. At the same time, due to the difficulty and time of maintenance, once a failure occurs, it will seriously affect the production progress and increase operating costs.

[0007] Insufficient adaptability: Existing dissolved air pumps usually have a fixed processing capacity, that is, the scale of dissolved air water produced is relatively fixed, and the adjustable range is small. This is an obvious limitation for application scenarios of different scales and frequent changes in demand, and lacks flexibility.

[0008] Specific challenges of micro-nano dissolved air pumps: Although micro-nano dissolved air pumps can produce smaller bubbles to improve the flotation effect, they rely on high-speed rotating impellers to cut air to form micro bubbles. This design will cause increased impeller wear in long-term use, further reducing flotation performance. In addition, micro-nano dissolved air pumps have extremely high maintenance requirements, difficult on-site maintenance, and a long maintenance cycle, which poses a serious challenge to the continuous production of flotation systems.

[0009] Scale and flexibility limitations: Whether it is a traditional dissolved air pump or a micro-nano dissolved air pump, their ability to adjust the amount of dissolved air and bubble size is relatively limited, and they cannot adapt well to the diverse needs of different application scenarios, especially when facing large flow fluctuations or requiring rapid response.

[0010] In summary, although the dissolved air pump technology performs well in some aspects, it faces many challenges in practical applications, such as equipment fragility, high cost, poor adaptability and flexibility. Therefore, the development of a new, more efficient and easy-to-maintain dissolved air device has become an urgent problem to be solved in this field. Summary of the invention

[0011] The present invention aims to provide an improved tubular ceramic membrane dissolved air device and a cyclone flotation system to overcome the above-mentioned shortcomings in the prior art and provide users with a more cost-effective option.

[0012] The present invention solves the above problem through the following technical solutions:

[0013] A novel tubular ceramic membrane gas dissolving device is provided, comprising a plurality of gas dissolving modules installed between an upper array plate and a lower array plate, the gas dissolving module comprising an outer tube and a ceramic membrane inner tube, wherein the outer tube wraps the ceramic membrane inner tube, the ceramic membrane inner tube is provided with an air inlet connected to the air inlet pipeline of the lower array plate, the upper and lower ends of the outer tube are respectively provided with a water inlet and a gas dissolving water outlet, the ceramic membrane inner tube is hollow, and a plurality of microchannels are provided on the tube wall. The water flow of the gas dissolving device does not pass through the ceramic membrane microchannel, and is not easy to be blocked. Different numbers of gas dissolving modules can be installed on array plates of different sizes to meet different production scale requirements.

[0014] In order to quickly assemble multiple dissolved air modules, the air inlet pipeline in the lower array plate is provided with several air inlet connectors, and the air inlet of the dissolved air module is snap-fitted to the air inlet connector, and silicone or EPDM is used as a gasket to assist the sealing gasket for sealing. A positioning protrusion is provided on the top of the dissolved air module, and a corresponding positioning hole is provided on the upper array plate. The dissolved air module is clamped in the positioning hole through the positioning protrusion, which is convenient for positioning and fixing.

[0015] Further description of the above scheme, the water inlets of several dissolved air modules are connected to the main water inlet, and the dissolved air water outlets are connected to the dissolved air water main outlet; the upper array plate and the lower array plate are connected and fixed by fixing rods, and the upper and lower parts are connected by threads.

[0016] In order to speed up the water flow rate, the water inlet is set with a bell mouth, and the small end of the bell mouth is connected to the outer tube tangentially; the inner wall of the outer tube is provided with a spiral guide groove to guide the water flow from the water inlet to the dissolved air water outlet, thereby forming a stable vortex. The bubbles and vortex water flow generated by the ceramic membrane can remove the pollutants adhered to the inside of the dissolved air device and reduce the occurrence of blockage. If blockage occurs, clean water can be introduced and the air volume can be increased to clear it.

[0017] Optionally, the outer tube of the dissolved air module is provided with a transparent window, and a small glass window can be provided above the dissolved air component, so that the water flow state and the dissolved air state can be observed, which is convenient for judging whether the working state is normal.

[0018] More preferably, the water inlet, the dissolved air water outlet and the pipe connection are connected by a flexible joint, which is convenient for separate disassembly and maintenance.

[0019] Further description of the above scheme, the average pore size of the inner tube of the ceramic membrane is 10nm-10μm. By controlling the average pore size of the microchannel of the inner tube of the ceramic membrane manufactured by screening, the dissolved gas component can mainly produce microbubbles of different average diameters, such as 5-20μm, 20-50μm, 50-100μm. By controlling the swirl flow rate, air pressure, and gas-liquid ratio, the average diameter of the output microbubbles can be adjusted within a certain range. The height of the dissolved gas component is 40cm-80cm, the outer diameter is 7-15cm, and the output of a single dissolved gas component is 0.2-1m3 / h.

[0020] The present invention also provides a cyclone flotation system, including the novel tubular ceramic membrane gas dissolving device described above, and also including an inlet pipe, a dosing device, a pipeline mixer, and a reaction tank connected in sequence, including an air inlet pipe and a circulation pump, the air inlet pipe is connected to the gas dissolving device and the reaction tank in sequence, and the two ends of the circulation pump are respectively connected to the water outlet pipes of the gas dissolving device and the reaction tank. A central pipe is arranged in the reaction tank, the bottom of the central pipe is connected to the sewage pipe, and the top of the reaction tank is provided with an exhaust pipe. Sewage enters from the water inlet pipe, and after the coagulant is added by the dosing device, the pipeline mixer mixes the coagulant with the sewage and enters the reaction tank. The pollutants in the sewage float to the water surface under the action of the microbubbles released by the gas dissolving device, and are enriched to the vortex center under the action of the cyclone and discharged from the central pipe through the sewage outlet. The treated sewage is discharged from the water outlet pipe at the bottom of the reaction tank, and a part of the treated sewage is discharged into the next process section, and a part of it is pressurized by the circulation pump as dissolved water and enters the gas dissolving device, and produces dissolved water with the air entering the gas dissolving device at the same time, and is released at the bottom of the reaction tank.

[0021] More preferably, a regulating valve is provided in front of the water inlet of the dissolved gas device to control the amount of water entering, thereby controlling the amount of dissolved gas water produced. A pressure regulating and measuring module is provided on the air inlet pipe to control the amount of air entering and measure the amount of air, which can regulate the effect of microbubbles and the amount of microbubbles to a certain extent. The circulating pump adopts a variable frequency regulating water pump, which can adjust the water flow rate by variable frequency, and regulate the size of the generated microbubbles to a certain extent, and control the amount of dissolved gas water output by controlling the amount of water entering.

[0022] More preferably, the tangential inlet of the reaction tank is located above the middle section of the reaction tank and more than 50 cm away from the water outlet of the reaction tank to prevent the incoming sewage from being sucked into the water outlet of the reaction tank and affecting the water quality of the outlet or the dissolved air module. The dissolved air release port of the reaction tank is more than 5 cm higher than the water outlet of the reaction tank to prevent a large number of microbubbles from being sucked into the water outlet of the reaction tank and affecting the dissolved air module. The dissolved air release ports are evenly arranged on both sides to evenly distribute the microbubbles. The water outlet of the reaction tank is 20-40 cm higher than the bottom of the reaction tank to prevent a small amount of sediment pollutants from entering the water outlet of the reaction tank. A sewage outlet is also added to the bottom of the reaction tank for regular discharge of sediments.

[0023] Compared with the prior art, the novel tubular ceramic membrane dissolved air device and cyclone flotation system provided by the present invention have the following significant beneficial effects compared with the dissolved air pump solution in the prior art:

[0024] By optimizing the water flow path design (such as bell-mouth water inlet, spiral guide groove, and tangential design of the water inlet), the water flow speed and stability can be effectively improved, ensuring that the gas forms evenly distributed small-sized microbubbles in the water.

[0025] The water flow does not pass directly through the ceramic membrane microchannel. The gas emerges directly from the ceramic membrane microchannel and produces microbubbles with the external water flow. This effectively avoids the blockage problem and further reduces the maintenance frequency.

[0026] The number of dissolved air modules and the size of the array plates can be flexibly adjusted according to actual needs to adapt to different scales of sewage treatment. In addition, by means of controlling the amount of water entering through the regulating valve, adjusting the air pressure through the pressure regulating measurement module, and changing the water flow rate through the frequency conversion regulating water pump, the size and number of microbubbles can be highly controllable to meet the requirements of various application scenarios.

[0027] The use of snap-on connections, union joints and other quick assembly and disassembly designs makes installation easy and quick, while facilitating the inspection and replacement of individual components, reducing downtime.

[0028] Using silicone or EPDM as sealing gaskets ensures good sealing performance and reduces material costs. The transparent window design allows operators to monitor the working status in real time, discover and solve problems in a timely manner, and reduce economic losses caused by potential failures.

[0029] The cyclone flotation system has a compact structure and occupies a small area, which is suitable for installation and use in various site conditions. The system runs smoothly with low noise, which meets the requirements of modern industry for environmental protection and safety.

[0030] In summary, the new tubular ceramic membrane dissolved air device provided by the present invention and the cyclone flotation system constituted by the same have shown obvious advantages in many aspects, not only solving the problems existing in the prior art, but also providing users with a more advanced and reliable choice. This will help to improve the overall level of sewage treatment, promote the construction of a resource-saving society, and contribute to the realization of sustainable development goals. The present invention provides new ideas and technical routes for the field of flotation dissolved air technology, and promotes the progress and development of related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 An overall schematic diagram of a gas dissolving module provided in an embodiment of the present invention;

[0033] Figure 2 A schematic cross-sectional view of an inner tube of a ceramic membrane provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the structure of the lower array plate provided in an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the installation of the upper array plate and the lower array plate provided in an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the principles of an embodiment of the present invention.

[0037] Among them, the reference numerals in the figure are:

[0038] 1. Dissolved air module; 101. Positioning protrusion; 102. Dissolved air water outlet; 103. Outer tube; 104. Ceramic membrane inner tube; 1041. Ceramic membrane inner tube cross section; 1042. Microbubbles; 1043. Microchannel; 105. Water inlet; 106. Air inlet; 2. Lower array plate; 201. Total water inlet; 202. Total dissolved air water outlet; 203. Air inlet pipeline; 204. Air inlet connection port; 205. Fixing hole; 206. Fixed rod; 3. Upper array plate; 301. Positioning hole; 4. Water inlet pipe; 401. Dosing device; 402. Pipe mixer; 403. Tangential inlet; 5. Air inlet pipe; 501. Pressure regulating and measuring module; 502. Circulation pump; 503. Dissolved gas release port; 6. Reactor; 601. Exhaust pipe; 602. Center pipe; 603. Reactor water outlet; 604. Water outlet pipe; 605. Sewage pipe; 7. Dissolved gas device.

[0039] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0042] See also Figure 1-Figure 4 As shown, this embodiment provides a novel tubular ceramic membrane gas dissolving device, comprising a plurality of gas dissolving modules 1 installed between an upper array plate 3 and a lower array plate 2, wherein the gas dissolving module 1 comprises an outer tube 103 and a ceramic membrane inner tube 104. Figure 1 As shown, the outer tube 103 wraps the ceramic membrane inner tube 104, and the ceramic membrane inner tube 104 is provided with an air inlet 106 connected to the air inlet pipeline 203 of the lower array plate 2. The upper and lower ends of the outer tube 103 are respectively provided with a water inlet 105 and a dissolved air water outlet 102. The ceramic membrane inner tube 104 is hollow. From the cross-section 1041 of the ceramic membrane inner tube, it can be seen that a plurality of microchannels 1043 are provided on the tube wall, as shown in FIG. Figure 2 As shown, the water flow of the gas dissolving device 7 does not pass through the ceramic membrane microchannel 1043 and is not easily blocked.

[0043] like Figure 3 ,4 As shown, in order to quickly assemble multiple dissolved air modules 1, the air inlet pipeline 203 in the lower array plate 2 is provided with a plurality of air inlet connectors 204, and the air inlet 106 of the dissolved air module 1 is snap-fitted to the air inlet connector 204, and silicone or EPDM is used as a gasket to assist in sealing. A positioning protrusion 101 is provided on the top of the dissolved air module 1, and a corresponding positioning hole 301 is provided on the upper array plate 3. The dissolved air module 1 is clamped in the positioning hole 301 through the positioning protrusion 101, which is convenient for positioning and fixing. The water inlet 105 of several dissolved air modules 1 is connected to the total water inlet 201, and the dissolved air water outlet 102 is connected to the total dissolved air water outlet 202; the upper array plate 3 and the lower array plate 2 are connected and fixed by a fixing rod 206 and a fixing hole 205, and the upper and lower parts are connected by threads.

[0044] In other embodiments, in order to speed up the water inlet flow rate, the water inlet 105 is set with a bell mouth, and the small end of the bell mouth is tangentially connected to the outer tube 103. The inner wall of the outer tube 103 is provided with a spiral guide groove to guide the water flow from the water inlet 105 to the dissolved air water outlet 102, thereby forming a stable vortex. The bubbles and vortex water flow generated by the ceramic membrane can remove the pollutants adhered to the inside of the dissolved air device 7 and reduce the occurrence of blockage. If blockage occurs, clean water can be introduced and the air volume can be increased to clear it.

[0045] In some embodiments, the outer tube 103 of the dissolved air module 1 is provided with a transparent window, which can be used to observe the water flow state and the dissolved air state, and is convenient for judging whether the working state is normal. The water inlet 105, the dissolved air water outlet 102 and the pipeline connection are connected with a flexible joint, which is convenient for separate disassembly and maintenance.

[0046] The average pore size of the microchannel 1043 of the ceramic membrane inner tube 104 is 10nm-10μm. By controlling the average pore size of the microchannel 1043 of the screened ceramic membrane inner tube 104, the dissolved gas module 1 can mainly produce microbubbles 1042 of different average diameters, such as 5-20μm, 20-50μm, and 50-100μm. By controlling the swirl flow rate, air pressure, and gas-liquid ratio, the average diameter of the output microbubbles 1042 can be adjusted within a certain range. The height of the dissolved gas module 1 is 40cm-80cm, the outer diameter is 7-15cm, and the output of a single dissolved gas module 1 is 0.2-1m3 / h.

[0047] In order to have a more thorough and comprehensive understanding of the disclosure of the present invention, the principle thereof is further explained below in conjunction with the usage method.

[0048] When in use, several dissolved air modules 1 are installed between the upper array plate 3 and the lower array plate 2, the air inlet 106 of the dissolved air module 1 is connected to the air inlet pipeline 203 of the lower array plate 2, the water inlet 105 of several dissolved air modules 1 is connected to the total water inlet 201, and the dissolved air water outlet 102 is connected to the dissolved air water total outlet 202; the upper array plate 3 and the lower array plate 2 are connected and fixed by a fixing rod 206, and the upper and lower array plates are connected by threads. After installation, low-pressure air is introduced into the air inlet pipeline 203, and water is pumped into the total water inlet 201. The air first enters the lower array plate 2 and is divided into the ceramic membrane inner tube 104. The air escapes through the microchannel 1043 on the ceramic membrane under the action of pressure, and forms microbubbles 1042 to form dissolved air water under the shear of the liquid vortex of the outer tube 103. The collected dissolved air water is discharged from the dissolved air water total outlet 202 of the upper array plate 3.

[0049] like Figure 5As shown, this embodiment also discloses a cyclone flotation system, including the novel tubular ceramic membrane gas dissolving device described above, and also including a water inlet pipe 4, a dosing device 401, a pipeline mixer 402, and a reaction tank 6 connected in sequence, including an air inlet pipe 5 and a circulation pump 502, the air inlet pipe 5 is connected to the gas dissolving device 7 and the reaction tank 6 in sequence, and the two ends of the circulation pump 502 are respectively connected to the gas dissolving device 7 and the water outlet pipe 604 of the reaction tank 6. A central pipe 602 is arranged in the reaction tank 6, the bottom of the central pipe 602 is connected to the sewage pipe 605, and an exhaust pipe 601 is arranged on the top of the reaction tank 6. Sewage enters from the water inlet pipe 4, and after the coagulant is added by the dosing device 401, the pipeline mixer 402 mixes the coagulant with the sewage and enters the reaction tank 6. The pollutants in the sewage float to the water surface under the action of the microbubbles 1042 released by the air dissolving device 7, and are enriched to the center of the vortex under the action of the cyclone and discharged from the central pipe 602 through the sewage outlet. The treated sewage is discharged from the water outlet pipe 604 at the bottom of the reaction tank 6. Part of the treated sewage is discharged into the next process section, and part of it is pressurized by the circulating pump 502 as dissolved air water and enters the air dissolving device 7 to produce dissolved air water with the air entering the air dissolving device 7 at the same time, and is released at the bottom of the reaction tank 6. A regulating valve is provided in front of the water inlet 105 of the air dissolving device 7 to control the amount of water entering, thereby controlling the amount of dissolved air water produced. A pressure regulating and measuring module 501 is provided on the air inlet pipe to control the amount of air intake and measure the amount of air, which can regulate the effect of the microbubbles 1042 and the amount of the microbubbles 1042 to a certain extent. The circulating pump 502 adopts a variable frequency regulating water pump, which can adjust the water flow rate by variable frequency, and regulate the size of the generated microbubbles 1042 to a certain extent, and control the amount of dissolved water output by controlling the amount of water entering. The tangential inlet 403 of the reaction tank 6 is arranged above the middle section of the reaction tank 6, and is more than 50 cm away from the reaction tank outlet 603, to prevent the incoming sewage from being sucked into the reaction tank outlet 603 to affect the water quality of the outlet water or affect the dissolved gas module 1. The dissolved gas release port 503 of the reaction tank 6 is more than 5 cm higher than the reaction tank outlet 603, to avoid more microbubbles 1042 from being sucked into the reaction tank outlet 603 to affect the dissolved gas module 1. The dissolved gas release port 503 is evenly arranged on both sides to evenly distribute the microbubbles 1042. The reaction tank outlet 603 is 20-40 cm higher than the bottom of the reaction tank 6 to prevent a small amount of sediment pollutants from entering the reaction tank outlet 603. A sewage outlet is also added to the bottom of the reaction tank 6 for regular discharge of sediments.

[0050] In order to have a more thorough and comprehensive understanding of the disclosure of the present invention, the principle thereof is further explained below in conjunction with the usage method.

[0051] The sewage enters the water inlet pipe 4 after being pressurized by the water inlet pump, and the flocculant is added through the No. 1 dosing port of the dosing device 401, mixed evenly in the pipeline mixer 402, and then the coagulant is added through the No. 2 dosing port. After being accelerated through the bell mouth, it enters the reaction tank 6 through the tangential inlet 403 and forms a vortex, and the coagulant is mixed in this process. The pollutants in the sewage float to the water surface under the action of the microbubbles 1042 released at the bottom, and are enriched to the vortex center under the action of the vortex and discharged from the central pipe 602 through the sewage outlet. The sewage after flotation treatment is discharged from the bottom reactor outlet 603, part of which is discharged into the next stage, and part of which is pressurized as dissolved air water by the circulation pump 502 and enters the ceramic membrane dissolved air device 7, and produces dissolved air water rich in a large number of microbubbles 1042 with the air entering at the same time and is released at the dissolved air release port 503 at the bottom of the reaction tank 6.

[0052] In the gas dissolving device 7, the incoming water and air are first divided into a single gas dissolving module 1. In the single gas dissolving module 1, air enters the hollow ceramic membrane inner tube 104 from the bottom air inlet 106 and escapes through the microchannel 1043 on the ceramic membrane under pressure. Water enters the outer tube 103 from the lower tangential inlet 403 and forms a vortex under the action of the guide groove, cutting away the escaped microbubbles 1042 to form dissolved gas water.

[0053] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the claims above.

[0054] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. The terms "upper end", "lower end", "left side", "right side", "front end", "rear end" and similar expressions used herein are positional relationships with reference to the accompanying drawings.

[0055] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A new type of tubular ceramic membrane dissolved gas device, characterized in that: The invention comprises a plurality of gas dissolving modules (1) installed between an upper array plate (3) and a lower array plate (2), wherein the gas dissolving modules (1) comprise an outer tube (103) and a ceramic membrane inner tube (104), wherein the outer tube (103) wraps the ceramic membrane inner tube (104), wherein the ceramic membrane inner tube (104) is provided with an air inlet (106) connected to an air inlet pipeline (203) of the lower array plate (2), wherein the upper and lower ends of the outer tube (103) are respectively provided with a water inlet (105) and a gas dissolving water outlet (102), and the ceramic membrane inner tube (104) is hollow, and a plurality of microchannels (1043) are provided on the tube wall.

2. A novel tubular ceramic membrane gas dissolving device according to claim 1, characterized in that: The air inlet pipeline (203) in the lower array plate (2) is provided with a plurality of air inlet connection ports (204); the air inlet port (106) of the air dissolving module (1) is snap-connected to the air inlet connection port (204) and sealed with a gasket; a positioning protrusion (101) is provided on the top of the air dissolving module (1); the upper array plate (3) is provided with a corresponding positioning hole (301); the air dissolving module (1) is snap-fitted into the positioning hole (301) via the positioning protrusion (101).

3. A novel tubular ceramic membrane gas dissolving device according to claim 1, characterized in that: The water inlets (105) of the plurality of dissolved air modules (1) are connected to the main water inlet (201), and the dissolved air water outlets (102) are connected to the dissolved air water main outlet (202); the upper array plate (3) and the lower array plate (2) are fixed by means of a fixing rod (206).

4. A novel tubular ceramic membrane gas dissolving device according to claim 1, characterized in that: The water inlet (105) is arranged in a bell-mouth configuration, and the small end of the bell-mouth is connected to the outer tube (103); the inner wall of the outer tube (103) is provided with a spiral guide groove to guide the water flow from the water inlet (105) to the dissolved air water outlet (102).

5. A novel tubular ceramic membrane gas dissolving device according to claim 1, characterized in that: The outer tube (103) of the gas dissolving module (1) is provided with a transparent window.

6. A novel tubular ceramic membrane gas dissolving device according to claim 1, characterized in that: The water inlet (105), the dissolved air water outlet (102) and the pipeline connection are connected using a flexible joint.

7. A novel tubular ceramic membrane gas dissolving device according to claim 1, characterized in that: The average pore size of the microchannel (1043) of the ceramic membrane inner tube (104) is 10 nm-10 μm.

8. A cyclonic flotation system, comprising the novel tubular ceramic membrane gas dissolving device according to any one of claims 1 to 7, characterized in that: The invention comprises a water inlet pipe (4), a dosing device (401), a pipeline mixer (402), and a reaction tank (6) which are connected in sequence, and also comprises an air inlet pipe (5) and a circulation pump (502), wherein the air inlet pipe (5) is connected to the air dissolving device (7) and the reaction tank (6) in sequence, and the two ends of the circulation pump (502) are respectively connected to the air dissolving device (7) and the water outlet pipe (604) of the reaction tank (6); a central pipe (602) is arranged in the reaction tank (6), the bottom of the central pipe (602) is connected to the sewage discharge pipe (605), and the top of the reaction tank (6) is provided with an exhaust pipe (601); sewage enters through the water inlet pipe (4), and is discharged through the central pipe (602) and the sewage discharge pipe (605); After the dosing device (401) adds the drug, the pipeline mixer (402) mixes the drug with the sewage and enters the reaction tank (6). The pollutants in the sewage float to the water surface under the action of the microbubbles (1042) released by the gas dissolving device (7), and are enriched in the vortex center under the action of the cyclone and discharged from the central pipe (602) through the sewage outlet. The treated sewage is discharged from the outlet pipe (604) at the bottom of the reaction tank (6). Part of the treated sewage is discharged into the next process section, and part of it is pressurized by the circulation pump (502) as dissolved air water and enters the gas dissolving device (7), and generates dissolved air water with the air that enters the gas dissolving device (7) at the same time, and is released at the bottom of the reaction tank (6).

9. A cyclone flotation system according to claim 8, characterized in that: A regulating valve is provided in front of the water inlet (105) of the gas dissolving device (7) for controlling the amount of water entering; a pressure regulating and measuring module (501) is provided on the gas inlet pipe for controlling the amount of gas entering and measuring the gas volume; and a variable frequency regulating water pump is used as the circulating pump (502).

10. A cyclone flotation system according to claim 8, characterized in that: The tangential inlet (403) of the reaction tank (6) is arranged above the middle section of the reaction tank (6) and more than 50 cm away from the water outlet (603) of the reaction tank; the dissolved gas release port (503) of the reaction tank (6) is more than 5 cm higher than the water outlet (603) of the reaction tank; the water outlet (603) of the reaction tank is 20-40 cm higher than the bottom of the reaction tank (6); and a sewage outlet is also provided at the bottom of the reaction tank (6) for regularly discharging sediment.

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