A catalytic oxidation device for removing organic pollutants from industrial wastewater

Abstract

This invention discloses a catalytic oxidation device for removing organic pollutants from industrial wastewater, comprising an oxidation tank with an exhaust pipe and an inlet pipe at the top and an outlet pipe at the bottom. The oxidation tank contains an aeration mechanism and a stirring mechanism. The aeration mechanism transmits ozone for aeration, and the stirring mechanism breaks up the bubbles generated during aeration, ensuring they are fully dissolved in the wastewater, thus improving the contact and reaction effects with the organic matter in the wastewater. The top of the oxidation tank is equipped with a bolt-fixed cover plate, and the bottom of the oxidation tank is equipped with a bolt-fixed base. This invention, through the stirring and cutting mechanisms, can significantly pulverize and break up aeration bubbles, increasing the contact time and contact area between ozone and wastewater, thereby improving the oxidation quality and efficiency.

Description

Technical Field

[0001] This invention belongs to the field of industrial wastewater treatment technology, and specifically relates to a catalytic oxidation device for removing organic pollutants from industrial wastewater. Background Technology

[0002] Industrial wastewater contains various impurities and pollutants and needs to be treated before it can be discharged. Industrial wastewater includes general wastewater and organic wastewater. Organic wastewater includes pharmaceutical wastewater, pharmaceutical chemical wastewater, printing and dyeing wastewater, coking wastewater, etc.

[0003] The treatment of organic wastewater is quite complex, requiring multiple treatment processes to work together. These include pretreatment processes such as bar filtration and coagulation sedimentation, catalytic oxidation, and post-treatment processes such as sludge dewatering. Appropriate processes need to be selected based on the type of wastewater. Among these processes, ozone catalytic oxidation can break down the molecular structure of organic matter, converting recalcitrant substances into biodegradable small molecules, reducing COD, decolorizing, and improving the biodegradability of wastewater.

[0004] Regarding the application of catalytic oxidation technology, a specific application method is provided in a technical patent for a catalytic oxidation device for removing organic pollutants from industrial wastewater, with announcement number CN224548182U. In the specific scheme, the radial position between the shearing shaft and the aeration shaft changes continuously while they rotate. This ensures the dissolution of ozone in the wastewater inside the treatment tank and effectively shears the ozone bubbles sprayed from the aeration cylinder, thereby enabling smaller ozone bubbles to catalytically oxidize the organic pollutants in the industrial wastewater, greatly improving the treatment quality.

[0005] However, the shearing position of the shearing shaft and shearing blades can only move within the limiting groove on the U-shaped frame, which greatly restricts the shearing range. Aeration bubbles in other directions of the aeration cylinder cannot be sheared, and the aeration water area that cannot be sheared occupies most of the water area in the treatment tank. More than half of the bubbles will float to the surface naturally and cannot come into contact with the shearing. Therefore, if this scheme is applied to the oxidation treatment step of dyeing and printing wastewater, the oxidation effect it wants to achieve will be greatly reduced.

[0006] Therefore, based on the above problems and existing technology, the applicant provides another catalytic oxidation device that can break up aeration bubbles more uniformly and improve oxidation quality. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a catalytic oxidation device for removing organic pollutants from industrial wastewater. Through the stirring mechanism and the cutting mechanism, the aeration bubbles can be greatly crushed and broken, thereby increasing the contact time and contact area between ozone and wastewater, and thus increasing the catalytic oxidation reaction rate.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A catalytic oxidation device for removing organic pollutants from industrial wastewater includes an oxidation tank. The top of the oxidation tank is equipped with an exhaust pipe and a water inlet pipe, and the bottom of the oxidation tank is equipped with a water outlet pipe. The oxidation tank is equipped with an aeration mechanism and a stirring mechanism. The aeration mechanism transmits ozone for aeration, and the stirring mechanism breaks up the bubbles generated by aeration to make them fully dissolve in the wastewater, thereby improving the contact and reaction effects with organic matter in the wastewater.

[0010] The oxidation tank is equipped with a bolted cover plate at the top and a bolted base at the bottom.

[0011] The aeration mechanism includes an air inlet pipe, a diversion pipe, and an aeration pipe; the diversion pipe is fixed to the bottom of the oxidation tank, with one end inside the oxidation tank and the other end outside the oxidation tank; one end of the air inlet pipe is connected to the diversion pipe, and the other end is connected to an ozone generator installed externally; one end of the aeration pipe is connected to the diversion pipe; the aeration pipes are connected to each other through a ring pipe to improve ventilation and aeration efficiency.

[0012] The diversion pipe is also equipped with an aeration cylinder, one end of which is connected to the diversion pipe. Inside the aeration cylinder are a lead screw and a sealing tank, with the sealing tank threadedly connected to the lead screw. The two ends of the lead screw are rotatably connected to the top of the aeration cylinder and the bottom of the diversion pipe via bearings. A fixed first motor is also provided outside the diversion pipe, with the rear end of the first motor connected to one end of the lead screw. A first keyway is provided on the inner wall of the aeration cylinder. A first key block is provided on the sealing tank, and the first key block fits into the first keyway. The lead screw drives the sealing tank to move up and down to seal the aeration holes on the aeration cylinder, thereby controlling the usable range and aeration height of the aeration holes on the aeration cylinder.

[0013] Furthermore, the sealing tank is provided with a snap-fit ​​rubber gasket on the outside to improve the fit between the sealing tank and the inner wall of the aeration cylinder and the sealing effect; the outer wall of the sealing tank is provided with a groove; the inner wall of the rubber gasket is provided with a block, and the block fits into the groove to make the rubber gasket firmly installed.

[0014] Furthermore, the sealing tank is equipped with bolt-fixed pressure plates at both ends, which press and cover both ends of the rubber gasket to improve the firmness of the rubber gasket and prevent the rubber gasket from being pushed or wrinkled during the up and down movement.

[0015] The stirring mechanism includes a second motor, a drive shaft, a first stirring shaft, a second stirring shaft, a support plate, a spline sleeve, a third motor, a chain, a drive sprocket, and a mounting base. The support plate is fixedly connected to the inner wall of the oxidation tank. The first and second stirring shafts are spaced apart. An L-shaped plate is provided on the support plate. The drive sprocket is located between the first and second stirring shafts, and the central shaft on the drive sprocket is rotatably connected to the L-shaped plate and the support plate. Stirring rods are provided on the first and second stirring shafts, and the stirring rods are distributed from top to bottom on the stirring shafts in a spiral pattern. The support plate and the mounting base are rotatably connected to both ends of the first stirring shaft, and the mounting base is fixed to the inner wall of the oxidation tank. A sprocket is provided at the end of the first stirring shaft.

[0016] The spline sleeve is rotatably connected to an L-shaped plate and a support plate at both ends. A sprocket is provided on the spline sleeve. One end of the second stirring shaft is movably connected to a mounting base, allowing for both sliding and rotation between the second stirring shaft and the mounting base. The other end is slidably connected to the spline sleeve. A key block on the second stirring shaft fits into the spline sleeve to form a spline structure. A limiting plate, a top plate, and a spring that fits onto the second stirring shaft are provided at the top of the second stirring shaft. The spring contacts the cover plate and the limiting plate. The third motor is fixed to the cover plate via a motor mount. A cam is provided at the end of the third motor shaft. The cam presses against the top plate and, in conjunction with the spring's push, enables the second stirring shaft to slide up and down, thereby changing the height of the stirring area. The chain connects the transmission sprocket and the sprockets on the first stirring shaft and the spline sleeve.

[0017] The second motor is fixed to the outer wall of the oxidation tank by a mounting bracket, and the shaft end of the second motor is provided with a bevel gear; the transmission shaft is rotatably connected to the outer wall of the oxidation tank, and both ends of the transmission shaft are provided with bevel gears, one end of which meshes with the bevel gear at the shaft end of the second motor; one set of the first stirring shaft is provided with a bevel gear at its end and meshes with the bevel gear at one end of the transmission shaft.

[0018] To improve the installation stability of the drive shaft, a support is provided on the inner wall of the oxidation tank. The drive shaft is rotatably connected to the support to improve the support and stability.

[0019] Furthermore, a cutting mechanism is also provided on the inner wall of the oxidation tank, which is located between the stirring mechanism and the aeration pipe. The cutting mechanism includes a ring frame and a slice fixed on the ring frame. The ring frame is fixedly connected to the inner wall of the oxidation tank by bolts. The slice is located directly above the aeration pipe and aligned with the aeration holes on the aeration pipe. The bubbles generated by the aeration of the aeration holes are broken and dispersed in the first instance.

[0020] Furthermore, an observation window is provided on the side wall of the oxidation tank for observing the level of wastewater inside the tank.

[0021] The advantages of this invention compared to existing technologies are as follows:

[0022] 1) This solution includes a stirring mechanism to break up the bubbles aerated from the aeration pipes and aeration cylinders over a large area. During the breaking up process, the rising speed of the bubbles is delayed, which increases the contact time and contact area between ozone and wastewater, thereby improving the quality and efficiency of ozone oxidation.

[0023] The stirring rods on the first and second stirring shafts are arranged in a spiral trajectory, thus ensuring that the stirring rods are evenly distributed within a 360° range (see attached diagram). Figure 7 As shown in the figure, this allows the bubbles to be broken up sequentially and orderly by the stirring rod as they rise; it can greatly avoid the omission of bubbles during the rising process, and can also break up bubbles multiple times, especially bubbles that rise vertically from the same position, which is more obvious.

[0024] Furthermore, the second stirring shaft, in cooperation with the spring and the cam at the end of the third motor shaft, can reciprocate up and down, achieving a crushing effect on water at different heights of the stirring rod, thus making the crushing more uniform.

[0025] 2) The aeration mechanism also includes an aeration cylinder connected to a distribution pipe. The first motor drives the lead screw to rotate, causing the sealing tank to move up and down inside the aeration cylinder. During the up-and-down movement of the sealing tank, a portion of the aeration holes on the aeration cylinder are blocked, thereby preventing the upward transmission of ozone gas. This controls the ozone aeration range to the aeration cylinder section below the sealing tank, thus adapting the aeration range and height to the liquid level of the wastewater inside the oxidation tank. This avoids wasted aeration work above the wastewater surface when the aeration cylinder is fully open, improving and ensuring the utilization rate of ozone. Attached Figure Description

[0026] Appendix Figure 1 This is a schematic diagram of the catalytic oxidation device for removing organic pollutants from industrial wastewater according to the present invention. Figure 1 ;

[0027] Appendix Figure 2 This is a schematic diagram of the catalytic oxidation device for removing organic pollutants from industrial wastewater according to the present invention. Figure 2 ;

[0028] Appendix Figure 3 This is a schematic diagram of the internal structure of the oxidation tank;

[0029] Appendix Figure 4 This is a schematic diagram of the stirring mechanism;

[0030] Appendix Figure 5 This is a schematic diagram of the second stirring shaft and stirring rod. Figure 1 ;

[0031] Appendix Figure 6 This is a schematic diagram of the second stirring shaft and stirring rod. Figure 2;

[0032] Appendix Figure 7 This is a top view of the second stirring rod;

[0033] Appendix Figure 8 This is a schematic diagram of the aeration pipe.

[0034] Appendix Figure 9 This is a schematic diagram of the aeration pipe and the cutting mechanism;

[0035] Appendix Figure 10 This is a schematic diagram of the internal structure of the aeration cylinder;

[0036] Appendix Figure 11 This is a schematic diagram of the sealing tank;

[0037] Appendix Figure 12 This is a schematic diagram of the exploded structure of the sealing tank;

[0038] In the diagram: 1. Oxidation tank; 11. Cover plate; 12. Base; 13. Observation window; 2. Inlet pipe; 3. Outlet pipe; 4. Exhaust pipe; 5. Aeration mechanism; 51. Air inlet pipe; 52. Diverter pipe; 53. Aeration pipe; 54. Aeration cylinder; 541. First keyway; 55. First motor; 56. Sealing tank; 562. First key block; 563. Insert groove; 564. Rubber gasket; 5641. Insert block; 565. Pressure plate; 57. Lead screw; 6. Cutting Mechanism; 61. Ring frame; 62. Slice; 7. Stirring mechanism; 71. Second motor; 72. Drive shaft; 721. Support; 73. First stirring shaft; 74. Second stirring shaft; 741. Limiting plate; 742. Top plate; 743. Spring; 75. Support plate; 751. L-shaped plate; 76. Spline sleeve; 77. Third motor; 771. Cam; 78. Chain; 79. Drive sprocket; 8. Stirring rod; 81. Helix; 9. Mounting base. Detailed Implementation

[0039] To facilitate understanding by those skilled in the art, the following is in conjunction with the appendix. Figure 1-12 The technical solution of the present invention will be further described in detail below.

[0040] A catalytic oxidation device for removing organic pollutants from industrial wastewater includes an oxidation tank 1. The top of the oxidation tank 1 is equipped with an exhaust pipe 4 and a water inlet pipe 2, and the bottom of the oxidation tank 1 is equipped with a water outlet pipe 3. The oxidation tank 1 is equipped with an aeration mechanism 5 and a stirring mechanism 7. The aeration mechanism 5 transmits ozone for aeration, and the stirring mechanism 7 breaks up the bubbles generated by aeration so that they are fully dissolved in the wastewater, thereby improving the contact effect and reaction effect with the organic matter in the wastewater.

[0041] The oxidation tank 1 is provided with a bolted cover plate 11 at the top and a bolted base 12 at the bottom.

[0042] The aeration mechanism 5 includes an air inlet pipe 51, a diversion pipe 52, and an aeration pipe 53. The diversion pipe 52 is fixed to the bottom of the oxidation tank 1, with one end inside the oxidation tank 1 and the other end outside the oxidation tank 1. One end of the air inlet pipe 51 is connected to the diversion pipe 52, and the other end is connected to an ozone generator installed outside the tank. One end of the aeration pipe 53 is connected to the diversion pipe 52. The aeration pipes 53 are connected to each other through a ring pipe to improve ventilation and aeration efficiency.

[0043] The diversion pipe 52 is also equipped with an aeration cylinder 54, one end of which is connected to the diversion pipe 52. Inside the aeration cylinder 54, there is a lead screw 57 and a sealing tank 56, with the sealing tank 56 threadedly connected to the lead screw 57. The two ends of the lead screw 57 are rotatably connected to the top of the aeration cylinder 54 and the bottom of the diversion pipe 52 respectively through bearings. A fixed first motor 55 is also provided outside the diversion pipe 52, with the rear end of the first motor 55 connected to one end of the lead screw 57. A first keyway 541 is provided on the inner wall of the aeration cylinder 54. A first key block 562 is provided on the sealing tank 56, which fits into the first keyway 541. The lead screw 57 drives the sealing tank 56 to move up and down to seal the aeration holes on the aeration cylinder 54, thereby controlling the usable range and aeration height of the aeration holes on the aeration cylinder 54.

[0044] Furthermore, the sealing tank 56 is provided with a snap-fit ​​rubber gasket 564 on the outside to improve the fit between the sealing tank 56 and the inner wall of the aeration cylinder 54 and the sealing effect; the outer wall of the sealing tank 56 is provided with a groove 563; the inner wall of the rubber gasket 564 is provided with a block 5641, which fits into the groove 563 to make the rubber gasket 564 securely installed.

[0045] Furthermore, the sealing tank 56 is equipped with bolt-fixed pressure plates 565 at both ends. The pressure plates 565 press down on both ends of the rubber gasket 564 to improve the firmness of the rubber gasket 564 and prevent the rubber gasket from being pushed or wrinkled during the up and down movement.

[0046] The stirring mechanism 7 includes a second motor 71, a drive shaft 72, a first stirring shaft 73, a second stirring shaft 74, a support plate 75, a spline sleeve 76, a third motor 77, a chain 78, a drive sprocket 79, and a mounting base 9. The support plate 75 is fixedly connected to the inner wall of the oxidation tank 1. The first stirring shaft 73 and the second stirring shaft 74 are spaced apart. An L-shaped plate 751 is provided on the support plate 75. The drive sprocket 79 is located between the first stirring shaft 73 and the second stirring shaft 74, and the central shaft on the drive sprocket 79 is rotatably connected to the L-shaped plate 751 and the support plate 75. Stirring rods 8 are provided on the first stirring shaft 73 and the second stirring shaft 74. The stirring rods 8 are distributed from top to bottom on the stirring shaft in the form of a spiral 81. The two ends of the first stirring shaft 73 are rotatably connected to the support plate 75 and the mounting base 9, respectively. The mounting base 9 is fixed to the inner wall of the oxidation tank 1. A sprocket is provided at the end of the first stirring shaft 73.

[0047] The spline sleeve 76 is rotatably connected to the L-shaped plate 751 and the support plate 75 at both ends. The spline sleeve 76 is equipped with a sprocket. One end of the second stirring shaft 74 is movably connected to the mounting base 9. The second stirring shaft 74 and the mounting base 9 can both slide and rotate. The other end is slidably connected to the spline sleeve 76. The second stirring shaft 74 is equipped with a key block that fits into the spline sleeve 76 to form a spline structure. The top end of the second stirring shaft 74 is equipped with a limiting plate 741, a top plate 742, and a spring 743 that fits onto the second stirring shaft 74. The spring 743 touches the cover plate 11 and the limiting plate 741. The third motor 77 is fixed to the cover plate 11 through a motor base. The shaft end of the third motor 77 is equipped with a cam 771. The cam 771 presses against the top plate 742 and cooperates with the push of the spring 743 to realize the up and down sliding of the second stirring shaft 74, thereby realizing the change of the stirring area height of the stirring rod 8. The chain 78 connects the transmission sprocket 79 and the sprockets on the first stirring shaft 73 and the spline sleeve 76.

[0048] The second motor 71 is fixed to the outer wall of the oxidation tank 1 by a fixed base, and the shaft end of the second motor 71 is provided with a bevel gear; the transmission shaft 72 is rotatably connected to the outer wall of the oxidation tank 1, and the two ends of the transmission shaft 72 are provided with bevel gears, one end of which meshes with the bevel gear at the shaft end of the second motor 71; the end of the first stirring shaft 73 is provided with a bevel gear and meshes with the bevel gear at one end of the transmission shaft 72.

[0049] To improve the installation stability of the drive shaft 72, a support 721 is provided on the inner wall of the oxidation tank 1. The drive shaft 72 is rotatably connected to the support 721 to improve the support and stability effect.

[0050] Furthermore, a cutting mechanism 6 is also provided on the inner wall of the oxidation tank 1. The cutting mechanism 6 is located between the stirring mechanism 7 and the aeration pipe 53. The cutting mechanism 6 includes a ring frame 61 and a slice 62 fixed on the ring frame 61. The ring frame 61 is fixedly connected to the inner wall of the oxidation tank 1 by bolts. The slice 62 is located directly above the aeration pipe 53 and aligned with the aeration holes on the aeration pipe 53. The bubbles generated by the aeration of the aeration holes are broken and dispersed in the first time.

[0051] Furthermore, an observation window 13 is provided on the side wall of the oxidation tank 1 for observing the level of wastewater inside the tank.

[0052] A catalytic oxidation device for removing organic pollutants from industrial wastewater operates as follows:

[0053] This device is powered by an external power source and achieves coordinated operation between various mechanical components based on existing PLC controllers and adapted control programs and programming logic sequences, as detailed below:

[0054] It is important to emphasize that the wastewater entering oxidation tank 1 has undergone pre-filtration treatment (including bar filtration, coagulation sedimentation, etc.). The wastewater in oxidation tank 1 enters through inlet pipe 2 and exits through outlet pipe 3. Ozone gas is transmitted through inlet pipe 51 into diversion pipe 52, and then dispersed into aeration pipe 53 and aeration cylinder 54 before being discharged for aeration. During this process, the first motor 55 drives the lead screw 57 to rotate, causing the sealing tank 56 to move up and down inside the aeration cylinder 54. The cooperation of the first key block 562 and the first keyway 541 can prevent the sealing tank 56 from rotating on its own. During the up and down movement of the sealing tank 56, it can block part of the aeration holes on the aeration cylinder 54, thereby preventing the upward transmission of ozone gas. This controls the ozone aeration range to the part of the aeration cylinder 54 below the sealing tank 56, thus adapting the aeration range and aeration height to the liquid level of the wastewater inside oxidation tank 1. This avoids the wastewater above the liquid level being aerated in vain when the aeration cylinder 54 is fully open.

[0055] At the same time, the bubbles generated after aeration by aeration pipe 53 are cut and broken by the slice 62 in the cutting mechanism 6 in the first moment, and then stirred by the stirring mechanism 7. The large number of bubbles generated by aeration are broken, so that ozone and organic matter in wastewater can come into contact and react to the greatest extent.

[0056] During the operation of the stirring mechanism 7, the second motor 71 drives the transmission shaft 72 to rotate, which, in conjunction with the chain 78, drives the first stirring shaft 73 and the second stirring shaft 74 to rotate simultaneously. Since the stirring rods 8 are arranged in a spiral pattern on the first stirring shaft 73 and the second stirring shaft 74, when viewed from below, the stirring rods 8 appear evenly distributed within a 360° range (e.g., ...). Figure 7 As shown in the figure, during the process of the bubbles rising after passing through the cutting mechanism 6, the bubbles that rise vertically at the same position will be broken up by multiple sets of stirring rods 8 from bottom to top, which can greatly avoid the leakage of bubbles.

[0057] Furthermore, the second stirring shaft 74 moves upward under the push of the spring 743, and then slides downward under the push of the cam 771 at the shaft end of the third motor 77. The two work together to make the second stirring shaft 74 slide up and down repeatedly, thereby making the height of the water layer stirred by the stirring rod 8 change continuously, and improving the turbulence and breaking effect.

[0058] Finally, the excess ozone in oxidation tank 1 will be discharged along exhaust pipe 4.

[0059] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting. Movable connection methods include, but are not limited to, sliding connection, rotating connection, and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution. Washers are provided in the connection process of the bolts, fixing bolts, studs and nuts. At the same time, the connection of the bolts, fixing bolts, studs and nuts is fixed by thread locking.

[0061] In summary, the electronic or electrical components, including but not limited to motors and controllers, are existing components that are custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this invention. The coordinated operation between these components is achieved based on existing controllers and adapted control programs and programming logic sequences. However, the aforementioned control programs are not within the scope of protection of this invention.

[0062] In summary, including but not limited to motors, controllers, and other power systems, as well as the transmission systems output by their respective power systems, protective covers should be provided according to the actual installation location if necessary, and sealing rings should be provided at the relative rotating connections to prevent wear or damage to the power system and transmission system caused by the external environment, and to further ensure the normal operation of the power system and transmission system.

[0063] The "automation" created by this invention does not rely on sensors, but is based on mechanical timing or stroke control. The actions of each mechanism can be automatically executed by the programmable controller and programming logic in a pre-set time sequence. Those skilled in the art know that this control method based on timing and stroke position switches is a mature automation technology, and the automated operation created by this invention can be achieved without sensors.

[0064] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A catalytic oxidation device for removing organic pollutants from industrial wastewater, comprising an oxidation tank, characterized in that... The oxidation tank is equipped with an exhaust pipe and a water inlet pipe at the top, and an outlet pipe at the bottom. The oxidation tank is equipped with an aeration mechanism and a stirring mechanism inside. The aeration mechanism transmits ozone for aeration, and the stirring mechanism breaks up the bubbles generated by aeration to ensure that they are fully dissolved in the wastewater, thereby improving the contact and reaction effects with organic matter in the wastewater. The oxidation tank is equipped with a bolt-fixed cover plate at the top and a bolt-fixed base at the bottom. The aeration mechanism includes an air inlet pipe, a diversion pipe, and an aeration pipe; the diversion pipe is fixed to the bottom of the oxidation tank, with one end inside the oxidation tank and the other end outside the oxidation tank; one end of the air inlet pipe is connected to the diversion pipe, and the other end is connected to an externally installed ozone generator; one end of the aeration pipe is connected to the diversion pipe; the aeration pipes are connected to each other through a ring pipe to improve ventilation and aeration efficiency; The diversion pipe is also equipped with an aeration cylinder, one end of which is connected to the diversion pipe. Inside the aeration cylinder are a lead screw and a sealing tank, with the sealing tank threadedly connected to the lead screw. The two ends of the lead screw are rotatably connected to the top of the aeration cylinder and the bottom of the diversion pipe via bearings. A fixed first motor is also provided outside the diversion pipe, with the rear end of the first motor connected to one end of the lead screw. A first keyway is provided on the inner wall of the aeration cylinder. A first key block is provided on the sealing tank, and the first key block fits into the first keyway. The lead screw drives the sealing tank to move up and down to seal the aeration holes on the aeration cylinder, thereby controlling the usable range and aeration height of the aeration holes on the aeration cylinder.

2. The catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 1, characterized in that... The sealing tank has a snap-fit ​​rubber pad on its outside to improve the fit between the sealing tank and the inner wall of the aeration cylinder and the sealing effect; the outer wall of the sealing tank has a groove; the inner wall of the rubber pad has a block, and the block fits into the groove to make the rubber pad firmly installed.

3. The catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 2, characterized in that... The sealing tank has bolt-fixed pressure plates at both ends. The pressure plates press down on both ends of the rubber gasket to improve the firmness of the gasket and prevent the gasket from being pushed or wrinkled during the up and down movement.

4. The catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 1, characterized in that... The stirring mechanism includes a second motor, a drive shaft, a first stirring shaft, a second stirring shaft, a support plate, a spline sleeve, a third motor, a chain, a drive sprocket, and a mounting base. The support plate is fixedly connected to the inner wall of the oxidation tank. The first and second stirring shafts are spaced apart. An L-shaped plate is provided on the support plate. The drive sprocket is located between the first and second stirring shafts, and its central shaft rotatably connects the L-shaped plate and the support plate. Stirring rods are provided on the first and second stirring shafts, and these rods are arranged in a spiral pattern from top to bottom on the stirring shafts. The support plate and the mounting base are rotatably connected to both ends of the first stirring shaft, and the mounting base is fixed to the inner wall of the oxidation tank. A sprocket is provided at the end of the first stirring shaft. The spline sleeve is rotatably connected to an L-shaped plate and a support plate at both ends. A sprocket is provided on the spline sleeve. One end of the second stirring shaft is movably connected to a mounting base, allowing for both sliding and rotation between the second stirring shaft and the mounting base. The other end is slidably connected to the spline sleeve. A key block on the second stirring shaft fits into the spline sleeve to form a spline structure. A limiting plate, a top plate, and a spring that fits onto the second stirring shaft are provided at the top of the second stirring shaft. The spring contacts the cover plate and the limiting plate. The third motor is fixed to the cover plate via a motor mount. A cam is provided at the end of the third motor shaft. The cam presses against the top plate and, in conjunction with the spring's push, enables the second stirring shaft to slide up and down, thereby changing the height of the stirring area. The chain connects the transmission sprocket and the sprockets on the first stirring shaft and the spline sleeve.

5. A catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 4, characterized in that... The second motor is fixed to the outer wall of the oxidation tank by a mounting bracket, and the shaft end of the second motor is provided with a bevel gear; the transmission shaft is rotatably connected to the outer wall of the oxidation tank, and both ends of the transmission shaft are provided with bevel gears, one end of which meshes with the bevel gear at the shaft end of the second motor; one set of the first stirring shaft is provided with a bevel gear at its end and meshes with the bevel gear at one end of the transmission shaft.

6. A catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 5, characterized in that... The inner wall of the oxidation tank is equipped with supports, and the drive shaft is rotatably connected to the supports to improve the support and stability.

7. The catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 1, characterized in that... The inner wall of the oxidation tank is also equipped with a cutting mechanism, which is located between the stirring mechanism and the aeration pipe. The cutting mechanism includes a ring frame and a slice fixed on the ring frame. The ring frame is fixedly connected to the inner wall of the oxidation tank by bolts. The slice is located directly above the aeration pipe and aligned with the aeration holes on the aeration pipe. The bubbles generated by the aeration of the aeration holes are broken and dispersed in the first instance.

8. The catalytic oxidation device for removing organic pollutants from industrial wastewater according to claim 1, characterized in that... An observation window is provided on the side wall of the oxidation tank for observing the level of wastewater inside the tank.

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