Micro-nano air flotation purification test equipment for sewage

Abstract

The invention provides sewage micro-nano air flotation purification test equipment which comprises a water tank, a plurality of center shafts capable of independently rotating are mounted on the inner side of the water tank, different types of aeration devices are arranged on the outer sides of the center shafts respectively, and the aeration devices comprise a water jet aeration device, an MABR membrane aeration device and a ceramic disc aeration device. According to the sewage micro-nano air flotation purification test equipment, the influence of different aeration modes, hydrodynamic driving modes and partition plate angles on the air flotation removal efficiency can be conveniently tested; state data of air floats under any combination of different types of impellers, different types of aeration devices and different-angle partition plates are obtained through a test data detection device, the aeration mode and the partition plate angle can be continuously optimized based on the air flotation removal efficiency, and proper hydrodynamic force driving parameters are found; and sufficient test data is provided as a basis for a sewage micro-nano air flotation purification mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage purification, in particular to a sewage micro-nano flotation purification test device. Background Art

[0002] In the fields of aquaculture effluent treatment, industrial and agricultural wastewater purification, etc., micro-nano flotation technology is usually required to remove suspended particulate matter and dissolved organic matter in sewage. The rotating ceramic membrane uses the rotational kinetic energy of the ceramic disk to evenly mix the gas and sewage and produce micro-nano bubbles; MABR combines biological treatment and membrane separation technology, and disperses bubbles through membrane components; cutting water jet aeration technology uses high-speed jet cutting liquid to complete gas-liquid mixing and produce micro-nano bubbles. The micro-nano bubbles adsorb suspended particulate matter and dissolved organic matter in the sewage, causing them to float to form a flotation layer to separate pollutants in the water.

[0003] Existing micro-nano flotation devices usually use a single aeration method and water drive method, and the sewage holding space in the device is fixed. Because there are significant differences in the sewage treatment effects under different aeration, water drive methods and sewage holding spaces when treating different types of sewage, the device has problems such as poor gas-liquid mixing, low mass transfer efficiency, high energy consumption, large bubbles and insufficient contact with pollutants when in use. If optimization based on flotation removal efficiency is required, the corresponding components in the device need to be repeatedly replaced. In addition, the device cannot compare the flotation separation effects under different aeration methods by monitoring and controlling operating parameters, and determine the design parameters of the high-efficiency and low-consumption flotation test device.

[0004] Therefore, in order to solve the above problems, the present invention proposes a sewage micro-nano flotation purification test equipment with different types of aeration and water drive modes, adjustable sewage holding space, and the ability to monitor flotation separation effects. Summary of the Invention

[0005] In order to solve the technical problems existing in the use of the above-mentioned existing micro-nano flotation devices, the present invention provides a sewage micro-nano flotation purification test equipment.

[0006] According to one purpose of the present invention, the present invention provides a sewage micro-nano flotation purification test device, comprising:

[0007] A water tank, wherein a plurality of independently rotatable central shafts are installed on the inner side of the water tank, and a different type of aeration device is respectively provided on the outer side of each central shaft, including a water jet aeration device, a MABR membrane aeration device and a ceramic disc aeration device;

[0008] The water tank is provided with a movable hydrodynamic support, and the hydrodynamic support is provided with several different types of impellers that can be individually controlled to start and stop, including C-MIX stirring rods, GT impellers and inverted umbrella impellers;

[0009] A partition is provided at the bottom of the inner side of the water tank, and an adjustable angle is provided between the partition and the inner bottom surface of the water tank;

[0010] A test data detection device is provided on the top of the water tank, and the test data detection device is configured to obtain status data of air floating matter in the water tank under any combination of different types of impellers, different types of aeration devices and partitions at different angles.

[0011] Preferably, the number of the aeration devices is three, namely a water jet aeration device, a MABR membrane aeration device and a ceramic disc aeration device, the central axes corresponding to the water jet aeration device, the MABR membrane aeration device and the ceramic disc aeration device are coaxially arranged, and the central axes corresponding to the water jet aeration device, the MABR membrane aeration device and the ceramic disc aeration device are sequentially arranged along the axial direction;

[0012] wherein the central axis corresponding to the ceramic disc aeration device is configured to supply air to the ceramic discs in the ceramic disc aeration device;

[0013] The MABR membrane aeration device includes a paddle-shaped base and an MABR membrane. The base is installed on the outside of the central axis, and the MABR membrane is wound and fixed on the base.

[0014] Preferably, a sliding guide rail is provided on the water tank, and the impeller is movably mounted on the sliding guide rail through the hydrodynamic support, and the impeller can move in any horizontal and vertical direction through the hydrodynamic support and the sliding guide rail;

[0015] There are three impellers, namely a C-MIX stirring rod, a GT impeller and an inverted umbrella impeller. The C-MIX stirring rod, the GT impeller and the inverted umbrella impeller are arranged in sequence along one horizontal direction.

[0016] Preferably, a mounting hole is provided on the side wall of the water tank, the arc-shaped slide is movably mounted on the inner side of the mounting hole, the partition is mounted on the side of the arc-shaped slide facing the inside of the water tank, the partition is arranged along the radial direction of the arc-shaped slide, and a driving member is provided on the side of the arc-shaped slide facing the outside of the water tank;

[0017] A shielding cover is provided on the side of the assembly hole facing the outside of the water tank, and a sealing strip is provided between the arc-shaped slide plate and the assembly hole.

[0018] Preferably, the sewage micro-nano flotation purification test equipment further comprises:

[0019] The froth extrusion device includes a reduction motor, a screw rod and an extrusion channel. The extrusion channel connects the inside and outside of the water tank. The extrusion channel is located on the inner side of the water tank and is provided with the screw rod. The screw rod is driven by the reduction motor.

[0020] Preferably, the sewage micro-nano flotation purification test equipment further comprises:

[0021] A supply and drainage device, comprising an air supply device, a water supply device and a drainage device;

[0022] The gas supply device includes an ozone generator, a gas storage tank and an air compressor, the ozone generator and the air compressor are respectively connected to the input end of the gas storage tank, and the output end of the gas storage tank is connected to the aeration device;

[0023] The water supply device includes a water supply pump, a mixing chamber and a medicine box, wherein the water supply pump is configured to pump tail water, the medicine box is configured to deliver flocculant to the tail water, the mixing chamber is configured to mix the tail water and the flocculant, and the mixing chamber is connected to the water tank;

[0024] The drainage device includes a drainage pump and a drainage pipe, and the drainage pump is connected to the water tank through the drainage pipe.

[0025] Preferably, the control device is configured to control the dynamic balance of the water in the water tank, wherein the control method of the control device comprises the following steps:

[0026] S1. Start the water supply device to supply water to the water tank;

[0027] S2 determines whether the water level in the water tank reaches the height of the partition. If so, the water supply device stops supplying water. If not, repeat step S1;

[0028] S3. Start the aeration device, the air supply device supplies air to the aeration device;

[0029] S4. Determine whether the air floating matter in the water tank meets the standard. If yes, proceed to the subsequent steps. If not, repeat step S3;

[0030] S5. The water supply device secondary water supply;

[0031] S6. Determine whether the water level in the water tank reaches the height of the partition. If yes, drain the water through the drainage device. If no, repeat step S5.

[0032] Preferably, the test data detection device includes a three-dimensional PIV particle measurement component, and the three-dimensional PIV particle measurement component includes a first detection bracket, a YAG laser, an optical arm and an industrial high-speed camera. The first detection bracket is installed on the sliding guide rail, and the top of the first detection bracket is installed with the YAG laser through the optical arm. The industrial high-speed camera is fixed above the water tank through a fixed bracket.

[0033] Preferably, the test data detection device also includes: a non-contact flow velocity detection component, the non-contact flow velocity detection component includes a second detection bracket, a rotating joint and a radar flow meter, the second detection bracket is installed on the sliding guide rail, and the upper end of the second detection bracket is connected to the radar flow meter through the rotating joint.

[0034] Preferably, the test data detection device further includes:

[0035] an infrared imaging camera assembly, the infrared imaging camera assembly being disposed below the first detection bracket, the infrared imaging camera assembly being disposed opposite the baffle, and the infrared imaging camera assembly being configured to detect the movement state of the air-floating matter in the water tank when the baffle is at different angles;

[0036] An ozone content detector is arranged below the hydrodynamic support and is adapted to detect the ozone content in the air in the water tank.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] This sewage micro-nano flotation purification test equipment can conveniently test the effects of different aeration methods, hydrodynamic drive methods, and baffle angles on flotation removal efficiency. Through a test data detection device, the state data of airborne matter under any combination of different types of impellers, different types of aeration devices, and baffles at different angles can be obtained. Based on the flotation removal efficiency, the aeration method and baffle angle can be continuously optimized to find suitable hydrodynamic drive parameters, providing sufficient test data as a basis for the sewage micro-nano flotation purification mechanism.

[0039] Among them, different types of micro-nano aeration methods can be used to carry out single control experiments, systematically comparing the differences in flotation removal efficiency between membrane aeration, membrane and water jet aeration technologies, revealing the mechanism of action and performance characteristics of each aeration method. Multiple micro-nano aeration methods can be combined to analyze the differences and advantages and disadvantages of different experimental schemes by comparing with a single aeration scheme. Furthermore, different types of micro-nano aeration methods can be configured to rotate through the central axis. By adjusting the speed of the central axis, a variety of micro-nano bubble diffusion forms can be generated, thereby regulating the flotation efficiency of the aeration device.

[0040] The impeller can be moved through the hydrodynamic support to achieve flexible adjustment of its spatial position. By fine-tuning the impeller in multiple dimensions, it is used to study the effects of different driving positions on the hydrodynamic characteristics and the movement patterns of particle matter. Furthermore, multiple groups of control studies are conducted using multiple types of impellers.

[0041] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is an overall schematic diagram of a sewage micro-nano flotation purification test device according to the present invention;

[0043] Figure 2 This is a schematic diagram of a ceramic disc aeration device in a sewage micro-nano flotation purification test equipment according to the present invention;

[0044] Figure 3 This is a schematic diagram of the MABR membrane aeration device in the sewage micro-nano flotation purification test equipment of the present invention;

[0045] Figure 4 This is a schematic diagram of a rotating device in a sewage micro-nano flotation purification test device according to the present invention;

[0046] Figure 5 This is a schematic diagram of a water power drive device in a sewage micro-nano flotation purification test device according to the present invention;

[0047] Figure 6 This is a schematic diagram of the connection between the water power support and the motor in the sewage micro-nano flotation purification test equipment of the present invention;

[0048] Figure 7 This is a schematic diagram of a three-dimensional PIV particle measurement component in a wastewater micro-nano flotation purification test device according to the present invention;

[0049] Figure 8 This is a schematic diagram of a non-contact flow velocity detection component in a sewage micro-nano flotation purification test device according to the present invention;

[0050] Figure 9 This is a schematic diagram of an infrared imaging camera assembly in a sewage micro-nano flotation purification test equipment according to the present invention;

[0051] Figure 10 This is a schematic diagram of an ozone content detector in a wastewater micro-nano flotation purification test device according to the present invention;

[0052] Figure 11 This is a schematic diagram of the working process of the ozone content detector in the sewage micro-nano flotation purification test equipment described in the present invention;

[0053] Figure 12This is a schematic diagram of a froth extrusion device in a wastewater micro-nano flotation purification test device according to the present invention;

[0054] Figure 13 This is a schematic diagram of the air supply device in the sewage micro-nano flotation purification test equipment of the present invention;

[0055] Figure 14 This is a schematic diagram of a water supply device in a wastewater micro-nano flotation purification test device according to the present invention;

[0056] Figure 15 This is a schematic diagram of a drainage device in a sewage micro-nano flotation purification test device according to the present invention;

[0057] Figure 16 This is a schematic diagram of a control method for a control device in a sewage micro-nano flotation purification test device according to the present invention. DETAILED DESCRIPTION

[0058] The following description is intended to fully illustrate the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are intended to be exemplary only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0059] See also Figure 1-16 The present invention provides a technical solution: a sewage micro-nano flotation purification test device, comprising an aeration device, a rotating device 5, a hydrodynamic drive device, a test data detection device, a froth extrusion device, and a supply and discharge device 10, which are mounted on a water tank 1. The water tank 1 is provided with a reaction zone, a static zone, and a froth collection zone;

[0060] The inner side of the water tank 1 is provided with a plurality of independently rotatable central shafts 24, and the outer sides of each central shaft 24 are provided with different types of aeration devices, the aeration devices including a water jet aeration device 2, a MABR membrane aeration device 3 and a ceramic disc aeration device 4. The central shafts 24 corresponding to the water jet aeration device 2, the MABR membrane aeration device 3 and the ceramic disc aeration device 4 are coaxially arranged, and the central shafts 24 corresponding to the water jet aeration device 2, the MABR membrane aeration device 3 and the ceramic disc aeration device 4 are sequentially arranged along the axial direction, respectively. Figure 1 、 23, wherein the ceramic disc 26 of the ceramic disc aeration device 4 is mounted on the outside of the central shaft 24 through a shaft clamp 23, and the central shaft 24 is configured to supply air to the ceramic disc 26. When in use, the central shaft 24 supplies air to the ceramic disc 26, and the gas diffuses outward through the ceramic disc 26 with fine pores to form micro-nano bubbles;

[0061] The MABR membrane aeration device 3 includes a paddle-shaped base 28 and a MABR membrane 27 wound and fixed to the outside of the base 28. When in use, when the central shaft 24 rotates, the MABR membrane 27 rotates along with the transmission shaft and emits bubbles outward.

[0062] The water jet aeration device 2 is different from the conventional water jet device in that it can swing along with the central axis 24. Specifically, the central axis 24 of the water jet aeration device 2 can drive the water jet aeration device 2 to reciprocate in the circumferential direction.

[0063] The central shaft 24 is driven and connected by a driving member. In this embodiment, the driving member is a torque motor 25. The aeration device can rotate under the action of the torque motor 25. The water jet aeration device 2, the MABR membrane aeration device 3 and the ceramic disc aeration device 4 in the aeration device can be multiple combinations or single settings. In addition, the aeration device can be combined with the hydrodynamic drive device.

[0064] like Figure 5 and 6 As shown, the hydrodynamic drive device includes a sliding guide rail 8, a hydrodynamic bracket 7, a motor 43 and an impeller. The sliding guide rail 8 is provided on the water tank 1. The impeller is movably mounted on the sliding guide rail 8 through the hydrodynamic bracket 7. The impeller is driven and connected by the motor 43. Figure 6 As shown, the impeller can move in any horizontal and vertical direction through the hydrodynamic support 7 and the sliding guide rail 8. The impeller plays a role in accelerating the flotation of particles in the test device through the hydrodynamic support 7. Specifically, the hydrodynamic support 7 is provided with a first vertical support 37 that can slide in the horizontal direction. The moving directions of the first vertical support 37 and the hydrodynamic support 7 on the horizontal plane are perpendicular to each other. The outer side of the first vertical support 37 is movably connected to the second vertical support 38 in a vertical direction. The impeller and the motor 43 are installed on the second vertical support 38.

[0065] In this embodiment, the number of blades is set to be multiple, and the impellers are of different types, including a C-MIX stirring rod 40, a GT impeller 42 and an inverted umbrella impeller 41. The three different types of impellers can be individually controlled to start and stop to conduct multiple groups of control studies.

[0066] like Figure 4 As shown, the rotating device 5 includes a curved slide 35, a partition 30, a frameless torque motor 36, a bolt 32, a sealing strip 31 and a shielding cover 33, wherein an adjustable angle is set between the partition 30 and the inner bottom surface of the water tank 1. Specifically, an assembly hole connecting the inside and the outside is opened on the side wall 34 of the water tank 1, the curved slide 35 is movably installed on the inner side of the assembly hole, and a sealing strip 31 is sealed between the curved slide 35 and the assembly hole. The partition 30 is installed on the curved slide 35 by the bolt 32, and the partition 30 is radially installed on the side of the curved slide 35 facing the inside of the water tank 1. The partition 30 is arranged at the inner bottom of the water tank 1, the frameless torque motor 36 is arranged on the outside of the curved slide 35, and the shielding cover 33 is arranged on the side of the assembly hole facing the outside of the water tank 1 On one side, in the rotating device 5, a sealing strip 31 is installed on the inner side of the arc-shaped skateboard 35 and cooperates with the side wall 34 of the water tank 1. The arc-shaped skateboard 35 and the partition 30 are fixed to the water tank 1 by bolts 32. Under the joint tightening action of the arc-shaped skateboard 35 and the sealing strip 31, the test device is ensured to be watertight. A frameless torque motor 36 is provided on the outer side of the arc-shaped skateboard 35. If it is necessary to adjust the angle between the partition 30 and the inner bottom surface of the water tank 1, it can be driven by the frameless torque motor 36, wherein the shielding cover 33 isolates the above components from the outside world. Compared with the existing aeration tank test device, the partition 30 is fixed. The test device can simplify the test steps and reduce the difficulty of the test. The partition can adjust its relative angle with the inside of the water tank 1, and indirectly change the geometric structure of the pool type in the water tank 1 through angle adjustment. The adjustment process does not require disassembly of the equipment and has waterproof performance.

[0067] like Figure 1 and 12 As shown, the froth extrusion device includes a reduction motor 48, a screw rod 19 and an extrusion channel 20. The extrusion channel 20 connects the inside and outside of the water tank 1. The extrusion channel 20 is located on the inner side of the water tank 1 and is provided with the screw rod 19. The screw rod 19 is driven by the reduction motor 48. When in use, the reduction motor 48 generates power, the screw rod 19 squeezes the froth in the water tank 1 to form slag, and the slag is transferred to the relevant container through the extrusion channel 20 for subsequent processing.

[0068] like Figure 13 、 14 As shown in FIG15 , the supply and drainage device 10 includes: an air supply device, a water supply device, and a drainage device;

[0069] The air supply device includes an ozone generator 49, a gas tank 50, an air compressor 51 and gas pipes 52, 53, and 54. The ozone generator 49 and the air compressor 51 are respectively connected to the input end of the gas tank 50, and the output end of the gas tank 50 is connected to the aeration device. Specifically, the output end of the gas tank 50 is connected to the central axis 24. The ozone generator 49 and the gas tank 50, the air compressor 51 and the gas tank 50, and the gas tank 50 and the aeration device are all connected through the gas pipes 52, 53, and 54. When in use, the ozone generator 49 produces ozone and transports it to the gas tank 50, and the air compressor 51 transports air to the gas tank 50. The air and ozone are mixed in the gas tank 50 and then transported to the aeration device at a certain concentration.

[0070] The water supply device includes a water supply pump 55, a mixing chamber 56 and a medicine box 57. The water supply pump 55 is configured to suck tail water, the medicine box 57 is configured to deliver flocculant to the tail water, the mixing chamber 56 is configured to mix the tail water and the flocculant, and the mixing chamber 56 is connected to the reaction zone of the water tank 1. When in use, the water supply pump 55 sucks the tail water, and the medicine box 57 delivers the flocculant to the tail water. The tail water and the flocculant are mixed in the mixing chamber 56 and then injected into the reaction zone of the water tank 1.

[0071] The drainage device is responsible for draining the static area in the water tank 1 . The drainage device includes a drainage pump 60 and a drainage pipe 61 . The drainage pump 60 is connected to the static area of ​​the water tank 1 through the drainage pipe 61 .

[0072] like Figure 1 and 16 As shown, the supply and discharge device 10 is automatically controlled by the control device 9, and the control device 9 is configured to control the dynamic balance of the water body in the water tank 1, wherein the control method of the control device 9 includes the following steps:

[0073] S1. Supply water to the water tank 1 through the water supply device;

[0074] S2 determines whether the water level in the water tank 1 reaches the height of the partition 30. If so, the water supply device stops supplying water. If not, repeat step S1;

[0075] S3. Start the aeration device, the air supply device supplies air to the aeration device;

[0076] S4. Determine whether the air-floating matter in the water tank 1 meets the standard. If yes, proceed to the subsequent steps. If not, repeat step S3;

[0077] S5. The water supply device secondary water supply;

[0078] S6. Determine whether the water level in the water tank 1 reaches the height of the partition 30. If yes, drain the water through the drainage device. If not, repeat step S5.

[0079] The control device 9 is used to realize automatic coordination of the supply and discharge device 10, ensure the dynamic balance of water and gas in the test device, and ensure the safety of the test.

[0080] See also Figure 1 、 7 , 8, 9 and 10, the test data detection device is configured to obtain the state data of the air-suspended matter in the water tank 1 under any combination of different types of impellers, different types of aeration devices and different angles of the baffles 30, and the test data detection device includes a three-dimensional PIV particle measurement component 11, a non-contact flow rate detection component, an infrared imaging camera component 13 and an ozone content detector 39;

[0081] The three-dimensional PIV particle measurement component 11 includes a first detection bracket 14, a YAG laser, an optical arm 12 and an industrial high-speed camera 21. The first detection bracket 14 is installed on the sliding guide rail 8. The YAG laser is installed on the top of the first detection bracket 14 through the optical arm 12. The YAG laser generates a laser beam, and the optical arm 12 transmits and adjusts the laser beam to hit the water body. The first detection bracket 14 controls the movement of the test data detection component as a whole in the Y-axis direction. The industrial high-speed camera 21 is fixedly arranged above the water tank 1 through a fixed bracket, and image detection and generation can be performed by the industrial high-speed camera 21. The three-dimensional PIV particle measurement component 11 is based on non-contact measurement, breaking through the limitations of single-point measurement and realizing transient measurement of the entire flow field. The three-dimensional PIV particle measurement component 11 can interact with the hydrodynamic drive device to realize direct connection between detection and execution, thereby ensuring the timeliness of flotation removal;

[0082] The non-contact flow velocity detection component includes a second detection bracket 17, a rotary joint 16 and a radar velocity meter 18. The second detection bracket 17 is installed on the sliding guide rail 8. The second detection bracket 17 controls the movement of the non-contact flow velocity detection component as a whole in the X-axis direction. The upper end of the second detection bracket 17 is connected to the radar velocity meter 18 through the rotary joint 16. The radar velocity meter 18 is configured to be suitable for rotating around the Z-axis through the rotary joint 16. The rotary joint 16 can enable the camera to rotate along the Z-axis, which enables the measuring instrument to accurately measure the measurement data at any position in the pool, reducing manual participation. The three-dimensional PIV particle measurement component 11 cooperates with the radar velocity meter 18 to infer physical quantities such as pressure field and vortex field through complete vector information, broaden the dimension of flow field analysis, and obtain original data that is closer to the real physical quantity;

[0083] See also Figure 7 and9 The infrared imaging camera assembly 13 is fixed and is arranged below the first detection bracket 14. The infrared imaging camera assembly 13 and the partition 30 are arranged opposite to each other. The infrared imaging camera assembly 13 is configured to detect the movement state of the air-suspended matter in the water tank 1 when the partition 30 is at different angles, providing test data for optimizing the angle of the partition 30;

[0084] See also Figure 6 and 11 The ozone content detector 39 is arranged below the hydrodynamic support 7. The working process of the ozone content detector 39 is as follows: Figure 11 As shown;

[0085] By setting up a bracket with multi-dimensional motion function, multi-directional observation of the test device can be achieved, and accurate detection of the overall status of the aeration tank can be achieved.

[0086] Furthermore, the water tank 1 adopts a transparent bottom, and the transparent bottom is installed with a light board 22 to provide sufficient light source for the measuring instrument, thereby improving the accuracy of the measurement data. The light boards 22 are provided in multiple groups, and the light boards 22 are arranged in a regular pattern, so as to play the role of marking the movement position of the particles in the experiment of studying the movement trajectory of the particles.

[0087] In summary, the sewage micro-nano flotation purification test equipment can conveniently test the effects of different aeration methods, hydrodynamic drive methods, and baffle angles on flotation removal efficiency. The test data detection device can obtain the state data of air-floating matter under any combination of different types of impellers, different types of aeration devices, and baffles at different angles. Based on the flotation removal efficiency, the aeration method and baffle angle can be continuously optimized to find the appropriate hydrodynamic drive parameters, providing sufficient test data as a basis for the sewage micro-nano flotation purification mechanism.

[0088] Among them, different types of micro-nano aeration methods can be used to carry out single control experiments, systematically comparing the differences in flotation removal efficiency between membrane aeration, membrane and water jet aeration technologies, revealing the mechanism of action and performance characteristics of each aeration method. Multiple micro-nano aeration methods can be combined to analyze the differences and advantages and disadvantages of different experimental schemes by comparing with a single aeration scheme. Furthermore, different types of micro-nano aeration methods can be configured to rotate through the central axis. By adjusting the speed of the central axis, a variety of micro-nano bubble diffusion forms can be generated, thereby regulating the flotation efficiency of the aeration device.

[0089] The impeller can be moved through the hydrodynamic support to achieve flexible spatial adjustment. The multi-dimensional fine adjustment of the impeller is used to study the effects of different drive positions on the hydrodynamic characteristics and particle movement patterns. Furthermore, multiple groups of controlled studies are conducted using multiple types of impellers.

[0090] In addition, a light panel is arranged on the bottom of the water tank to provide sufficient lighting for the measurement process and to mark the movement and aggregation status of the suspended particles.

[0091] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The scope of the patent application of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A sewage micro-nano flotation purification test equipment, characterized in that: include: A water tank (1), wherein a plurality of independently rotatable central shafts (24) are installed on the inner side of the water tank (1), and different types of aeration devices are respectively provided on the outer sides of the central shafts (24), wherein the aeration devices include a water jet aeration device (2), a MABR membrane aeration device (3) and a ceramic disc aeration device (4); The water tank (1) is provided with a movable hydrodynamic support (7), and the hydrodynamic support (7) is provided with a plurality of different types of impellers that can be individually controlled to start and stop, the impellers including a C-MIX stirring rod (40), a GT impeller (42) and an inverted umbrella impeller (41); A partition (30) is provided at the bottom of the inner side of the water tank (1), and an adjustable angle is provided between the partition (30) and the inner bottom surface of the water tank (1); A test data detection device is provided on the top of the water tank (1), and the test data detection device is configured to obtain status data of air-floating matter in the water tank (1) under any combination of different types of impellers, different types of aeration devices, and different angles of the baffles (30).

2. A sewage micro-nano flotation purification test equipment according to claim 1, characterized in that: The number of the aeration devices is three, namely a water jet aeration device (2), a MABR membrane aeration device (3) and a ceramic disc aeration device (4); the central axes (24) corresponding to the water jet aeration device (2), the MABR membrane aeration device (3) and the ceramic disc aeration device (4) are coaxially arranged, and the central axes (24) corresponding to the water jet aeration device (2), the MABR membrane aeration device (3) and the ceramic disc aeration device (4) are sequentially arranged along the axial direction; wherein the central axis (24) corresponding to the ceramic disc aeration device (4) is configured to supply air to the ceramic disc (26) in the ceramic disc aeration device (4); The MABR membrane aeration device (3) includes a paddle-shaped base (28) and an MABR membrane (27), wherein the base (28) is installed on the outside of the central shaft (24), and the MABR membrane (27) is wound and fixed on the base (28).

3. A sewage micro-nano flotation purification test equipment according to claim 1, characterized in that: The water tank (1) is provided with a sliding guide rail (8), and the impeller is movably mounted on the sliding guide rail (8) via the hydrodynamic support (7). The impeller can move in any horizontal and vertical direction via the hydrodynamic support (7) and the sliding guide rail (8); There are three impellers, namely a C-MIX stirring rod (40), a GT impeller (42) and an inverted umbrella impeller (41). The C-MIX stirring rod (40), the GT impeller (42) and the inverted umbrella impeller (41) are arranged in sequence along one horizontal direction.

4. A sewage micro-nano flotation purification test equipment according to claim 1, characterized in that: An assembly hole is provided on the side wall (34) of the water tank (1), and the arc-shaped slide (35) is movably installed inside the assembly hole. The partition (30) is installed on the side of the arc-shaped slide (35) facing the inside of the water tank (1). The partition (30) is arranged along the radial direction of the arc-shaped slide (35), and a driving member is provided on the side of the arc-shaped slide (35) facing the outside of the water tank (1). A shielding cover (33) is provided on the side of the assembly hole facing the outside of the water tank (1), and a sealing strip (31) is provided between the arc-shaped slide plate (35) and the assembly hole.

5. The sewage micro-nano flotation purification test equipment according to claim 1, characterized in that: The sewage micro-nano flotation purification test equipment also includes: A froth extrusion device comprises a reduction motor (48), a screw rod (19) and an extrusion channel (20); the extrusion channel (20) communicates with the inside and outside of the water tank (1); the extrusion channel (20) is located on the inner side of the water tank (1) and is provided with the screw rod (19); the screw rod (19) is driven by the reduction motor (48).

6. A sewage micro-nano flotation purification test equipment according to claim 1, characterized in that: The sewage micro-nano flotation purification test equipment also includes: A supply and drainage device (10), the supply and drainage device (10) comprising an air supply device, a water supply device and a drainage device; The air supply device includes an ozone generator (49), a gas storage tank (50) and an air compressor (51), wherein the ozone generator (49) and the air compressor (51) are respectively connected to the input end of the gas storage tank (50), and the output end of the gas storage tank (50) is connected to the aeration device; The water supply device comprises a water supply pump (55), a mixing chamber (56) and a medicine box (57), wherein the water supply pump (55) is configured to pump tail water, the medicine box (57) is configured to deliver flocculant to the tail water, the mixing chamber (56) is configured to mix the tail water and the flocculant, and the mixing chamber (56) is connected to the water tank (1); The drainage device comprises a drainage pump (60) and a drainage pipe (61), and the drainage pump (60) is connected to the water tank (1) through the drainage pipe (61).

7. A sewage micro-nano flotation purification test equipment according to claim 6, characterized in that: The control device (9) is configured to control the dynamic balance of the water body in the water tank (1), wherein the control method of the control device (9) comprises the following steps: S1. Start the water supply device to supply water to the water tank (1); S2. Determine whether the water level in the water tank (1) reaches the height of the partition (30). If so, the water supply device stops supplying water. If not, repeat step S1; S3. Start the aeration device, the air supply device supplies air to the aeration device; S4. Determine whether the air-floating matter in the water tank (1) meets the standard. If yes, proceed to the subsequent steps. If not, repeat step S3; S5. The water supply device secondary water supply; S6. Determine whether the water level in the water tank (1) reaches the height of the partition (30). If yes, drain the water through the drainage device. If no, repeat step S5.

8. The sewage micro-nano flotation purification test equipment according to claim 3, characterized in that: The test data detection device includes a three-dimensional PIV particle measurement component (11), and the three-dimensional PIV particle measurement component (11) includes a first detection bracket (14), a YAG laser, an optical arm (12) and an industrial high-speed camera (21). The first detection bracket (14) is installed on the sliding guide rail (8), and the top of the first detection bracket (14) is installed with the YAG laser through the optical arm (12). The industrial high-speed camera (21) is fixed above the water tank (1) through a fixed bracket.

9. The sewage micro-nano flotation purification test equipment according to claim 3, characterized in that: The test data detection device further comprises: a non-contact flow velocity detection component, the non-contact flow velocity detection component comprising a second detection bracket (17), a rotary joint (16) and a radar flow meter (18), the second detection bracket (17) being mounted on the sliding guide rail (8), and the upper end of the second detection bracket (17) being connected to the radar flow meter (18) via the rotary joint (16).

10. The sewage micro-nano flotation purification test equipment according to claim 8, characterized in that: The test data detection device also includes: an infrared imaging camera assembly (13), the infrared imaging camera assembly (13) being arranged below the first detection bracket (14), the infrared imaging camera assembly (13) and the partition (30) being arranged relative to each other, and the infrared imaging camera assembly (13) being adapted to detect the movement state of the air-floating matter in the water tank (1) when the partition (30) is at different angles; An ozone content detector (39) is provided below the hydrodynamic support (7), and the ozone content detector (39) is adapted to detect the ozone content in the air in the water tank (1).

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