Catalytic oxidation reactor for treating wastewater containing antibiotics

Abstract

The present application relates to the field of catalytic oxidation reactor, disclose a kind of catalytic oxidation reactor for antibiotic-containing wastewater treatment, including tank body, the inside of tank body is sleeved with the net disc cover of inclined arrangement, the inside of net disc cover is filled with catalytic oxidation particle;The inside of tank body is slidably sleeved with filter screen disc below net disc cover, driving mechanism is arranged on tank body, driving mechanism is used to drive net disc cover and filter screen disc rotation and move up and down;Tank body is equipped with at least one group of communication pipe outside.This application separates and collects the large particles generated by catalytic oxidation loss by particle screening mechanism and extraction mechanism and sends into pretreatment mechanism, avoids catalyst loss waste, pretreatment mechanism uses the collected large particles to pretreat the wastewater to be treated, recycling and reuse and reduce the load of main reactor;At the same time, through the rotation and up and down movement of the driving mechanism of the alternately inclined net disc cover, dynamic disturbance catalytic layer and centrifugal gathering particles, it is convenient to concentrate and extract, prevent tank bulk plug.

Description

Technical Field

[0001] This invention relates to the field of catalytic oxidation reactor technology, and more specifically, to a catalytic oxidation reactor for treating antibiotic-containing wastewater. Background Technology

[0002] For the treatment of antibiotic-containing wastewater, traditional biological methods are inefficient due to the antibacterial properties of antibiotics. Therefore, advanced oxidation technologies based on catalytic oxidation have become the core solution. The background is that antibiotics are chemically stable and persistent in the environment, inducing drug-resistant bacteria and genes, posing a serious threat to ecology and human health. Conventional physicochemical methods such as adsorption and precipitation can only achieve phase transfer and cannot effectively mineralize pollutants. Therefore, it is necessary to utilize highly reactive free radicals (such as hydroxyl radicals and sulfate radicals) or non-radical reactive species (such as singlet oxygen) generated by catalytic oxidation reactions to destroy the molecular structure of antibiotics through strong oxidation.

[0003] In existing catalytic oxidation equipment, when using heterogeneous catalytic technologies such as persulfate activation (SR-AOPs) and Fenton-like oxidation to treat antibiotic wastewater, the problem of insufficient catalyst layer stability is faced. Specifically, as the wastewater continuously and dynamically flows through the reactor, the catalytic oxidation layer will undergo physical wear or structural disintegration under long-term hydraulic scouring and chemical reaction, constantly generating fine particles. These particles will be discharged from the system along with the treated effluent, which not only causes continuous loss and depletion of catalyst and increases operating costs, but may also introduce secondary solid particulate pollution. Summary of the Invention

[0004] This invention provides a catalytic oxidation reactor for treating antibiotic-containing wastewater, solving the technical problem of waste caused by the discharge of catalytic oxidation particles in related technologies.

[0005] This invention provides a catalytic oxidation reactor for treating antibiotic-containing wastewater, comprising a tank, an inclined mesh cover being fitted inside the tank, and catalytic oxidation particles being contained inside the mesh cover; The tank body has a sliding sleeve with a filter screen located below the screen cover. The tank body is equipped with a drive mechanism for driving the screen cover and the filter screen to rotate and move up and down. The outer side of the tank is provided with at least one set of connecting pipes, which are connected to the inside of the tank. The connecting pipe is equipped with a particle screening mechanism, which is connected to an extraction mechanism. The extraction mechanism is used to extract particulate matter generated in the tank due to particle loss during catalytic oxidation through the connecting pipe. The discharge end of the extraction mechanism is connected to a pretreatment mechanism, which is used to collect relatively large particles from the extracted particulate matter and use these particles to pretreat the antibiotic wastewater to be introduced into the tank.

[0006] As a further optimization of the present invention, the driving mechanism includes a drive motor, a rotating tube, a linear actuator, and a drive rod. The drive motor is installed on the top of the tank. The rotating tube is fixedly fitted with the screen cover and the filter screen. The linear actuator is installed at the bottom of the tank, and its output end is rotatably connected to the rotating tube. The drive rod is connected to the output end of the drive motor and slides into the interior of the rotating tube. The rotating tube is provided with a groove adapted to the drive rod.

[0007] As a further optimization of the present invention, the number of mesh covers is three, wherein the mesh covers located at the top and bottom are arranged in parallel and inclined directions, and the mesh cover located in the middle is inclined in the opposite direction to the mesh covers at the top and bottom.

[0008] As a further optimization of the present invention, a connecting pipe is disposed in the area between the mesh cover and the filter screen. A valve one and a valve two are respectively provided on both sides of the particle screening mechanism on the connecting pipe. The particle screening mechanism includes a screen cylinder and a partition. The partition is fixedly installed inside the connecting pipe, and the screen cylinder is movably disposed inside the connecting pipe. One end of the screen cylinder is a gradually narrowing smaller diameter end. The mesh diameter of this smaller diameter end is larger than the mesh diameter of other areas of the screen cylinder, so that particles with relatively large surface areas are trapped outside the screen cylinder.

[0009] As a further optimization of the present invention, the particle screening mechanism also includes a return component, which includes a guide rod, a return spring, and a connecting plate. The connecting plate is fixed inside the connecting pipe. One end of the guide rod is connected to the screen cylinder, and the other end slides through the connecting plate. The return spring is sleeved on the guide rod and connected between the connecting plate and the screen cylinder.

[0010] As a further optimization of the present invention, the extraction mechanism includes an extraction pump and a manifold, the manifold being connected to a connecting pipe, the suction end of the extraction pump being connected to the manifold, and the discharge end of the extraction pump being connected to the pretreatment mechanism.

[0011] As a further optimization of the present invention, the pretreatment mechanism includes a sleeve, an inlet hopper, and an auger. The sleeve is connected to the discharge end of the extraction pump. The inlet hopper is fixedly installed inside the sleeve. The auger is installed inside the sleeve and connected to the inlet hopper. The auger has a hollow structure and has through holes for storing relatively large particles that have been screened out, and for contacting the antibiotic wastewater entering the sleeve with the particles for pretreatment.

[0012] As a further optimization of the present invention, a discharge valve is connected between the partition and the valve on the connecting pipe for discharging smaller particles and sediments collected inside the screen cylinder.

[0013] As a further optimization of the present invention, an axial flow blade is rotatably provided at the smaller diameter end of the screen cylinder, and a brush for agitating the end of the screen cylinder is connected to the axial flow blade.

[0014] As a further optimization of the present invention, a drain valve is connected to the bottom of the tank.

[0015] The beneficial effects of this invention are as follows: 1. The catalytic oxidation reactor for treating antibiotic-containing wastewater described in this invention, by setting up a particle screening mechanism and an extraction mechanism, can effectively extract and screen the particulate matter generated by the long-term use and wear of catalytic oxidation particles in the tank. Among them, the particles with larger surface areas are separated, collected and sent to the pretreatment mechanism, which avoids the direct loss of these particles that still have catalytic activity with the effluent, thereby reducing the waste of catalyst and lowering the operating cost.

[0016] 2. The catalytic oxidation reactor for treating antibiotic wastewater described in this invention, by setting up a pretreatment mechanism, stores relatively large catalyst particles that have been screened in an auger, and uses these particles to pretreat the fresh antibiotic wastewater to be introduced into the tank, so that the wastewater comes into contact with the catalyst particles before entering the main reactor and undergoes a preliminary oxidation reaction, thereby realizing the resource reuse of the lost particles, reducing the treatment load of the main reactor, and improving the overall treatment efficiency.

[0017] 3. The catalytic oxidation reactor for treating antibiotic-containing wastewater described in this invention, by setting three screen covers with alternating opposite tilt directions and combining them with a drive mechanism to drive the screen covers and filter screens to rotate and move up and down, can generate dynamic disturbance to the catalytic oxidation layer during wastewater treatment, prompting small particles generated by wear to separate from the screen covers in a timely manner. At the same time, the centrifugal effect of the filter screens is used to gather particles and sediments to the inner peripheral wall of the tank, making it easier for the subsequent extraction mechanism to extract them in a concentrated manner, effectively solving the problem of particle accumulation and blockage inside the tank.

[0018] 4. The catalytic oxidation reactor for treating antibiotic-containing wastewater described in this invention, by setting a discharge valve, can periodically discharge smaller particles and sediments collected inside the screen cylinder from the system, avoiding long-term accumulation of fine particles in the screen cylinder and causing blockage, thus ensuring the long-term stable operation of the particle screening mechanism; at the same time, by setting axial flow blades and bristles at the smaller diameter end of the screen cylinder, the liquid flow drives the bristles to continuously brush the end of the screen cylinder, further improving the anti-clogging ability and screening smoothness. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a catalytic oxidation reactor for treating antibiotic-containing wastewater proposed in this invention.

[0020] Figure 2 This is a schematic diagram of the structure of a catalytic oxidation reactor for treating antibiotic-containing wastewater, proposed in this invention, from another perspective.

[0021] Figure 3 This is a schematic diagram of the internal structure of the tank in a catalytic oxidation reactor for treating antibiotic-containing wastewater proposed in this invention.

[0022] Figure 4 This is a schematic diagram of the distribution of filter screens in a catalytic oxidation reactor for treating antibiotic-containing wastewater, as proposed in this invention.

[0023] Figure 5 for Figure 4 An enlarged structural diagram of point A in the diagram.

[0024] Figure 6 This is a schematic diagram of the internal structure of the casing in a catalytic oxidation reactor for treating antibiotic-containing wastewater proposed in this invention.

[0025] Figure 7 This is a schematic diagram of the axial flow blades in a catalytic oxidation reactor for treating antibiotic-containing wastewater, as proposed in this invention.

[0026] In the picture: 1. Tank body; 2. Network disk cover; 3. Filter tray; 4. Drive mechanism; 41. Drive motor; 42. Rotary tube; 421. Slide; 43. Linear actuator; 44. Drive rod; 5. Connecting pipe; 6. Particle screening mechanism; 61. Screen cylinder; 62. Baffle plate; 63. Guide rod; 64. Return spring; 65. Connecting plate; 7. Extraction mechanism; 71. Extraction pump; 72. Manifold; 8. Pretreatment mechanism; 81. Sleeve; 82. Liquid inlet hopper; 83. Screwdriver; 9. Valve 1; 10. Valve 2; 11. Discharge valve; 12. Axial flow blades; 13. Brush bristles; 14. Drain valve. Detailed Implementation

[0027] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0028] Example 1 Please see Figures 1 to 7 Embodiment 1 of the present invention provides a catalytic oxidation reactor for treating antibiotic-containing wastewater, including a tank 1, which has an upward opening and an internal treatment chamber. like Figure 1 and Figure 3 As shown, the tank 1 is fitted with an inclined mesh cover 2, which contains catalytic oxidation particles. The mesh cover 2 is used to contain catalytic oxidation particles (such as supported transition metal oxides, carbon-based composite materials or MOF-derived materials) for heterogeneous catalytic oxidation treatment of antibiotic-containing wastewater.

[0029] In this embodiment, there are three mesh screens 2. The mesh screens 2 located at the top and bottom are arranged in parallel and inclined directions, while the mesh screen 2 located in the middle is inclined in the opposite direction to the mesh screens 2 located at the top and bottom. This inclined arrangement of "parallel top and bottom, opposite direction in the middle" can generate a turbulent effect in the wastewater when rotating, increasing the contact time and contact area between the wastewater and the catalytic oxidation particles, thereby improving the catalytic oxidation efficiency.

[0030] Inside the tank body 1, a filter screen 3 is also slidably mounted below the mesh screen cover 2. The filter screen 3 is also inclined. The filter screen 3 is used to receive and initially separate the fine catalyst particles that fall off from the mesh screen cover 2 above and the precipitates generated by the reaction.

[0031] The tank 1 is equipped with a drive mechanism 4, which is used to drive the mesh cover 2 and the filter screen 3 to rotate and move up and down simultaneously.

[0032] In this embodiment, the drive mechanism 4 includes a drive motor 41, a rotating tube 42, a linear actuator 43, and a drive rod 44. The drive motor 41 is fixedly mounted on the top of the tank 1 via a mounting bracket. The rotating tube 42 is arranged along the axial direction of the tank 1 and is fixedly fitted to the middle of the mesh cover 2 and the filter screen 3. The linear actuator 43 is installed at the bottom of the tank 1. The linear actuator 43 can be a hydraulic cylinder or a pneumatic cylinder, and its output end slides into the interior of the tank 1 and is rotatably connected to the lower end of the rotating tube 42 (i.e., the linear actuator 43 can push the rotating tube 42 up and down, but does not restrict the rotation of the rotating tube 42). The drive rod 44 is axially connected to the output end of the drive motor 41 via a coupling. The drive rod 44 has protruding ribs on both sides and slides into the interior of the rotating tube 42. The rotating tube 42 has grooves 421 on both sides that are adapted to the protruding ribs.

[0033] Through the aforementioned driving mechanism 4, the drive motor 41 drives the drive rod 44 to rotate. The drive rod 44, through the cooperation of the protrusion and the sliding groove 421, drives the rotating tube 42 to rotate, thereby driving the screen cover 2 and the filter screen 3 to rotate synchronously. At the same time, the linear actuator 43 can drive the rotating tube 42 to move up and down along the axial direction, so that the screen cover 2 and the filter screen 3 can move up and down while rotating. When the tank 1 is full of wastewater, the rotation and up and down movement of the screen cover 2 and the filter screen 3 can disturb the catalyst layer, causing small particles generated by the loss of catalytic oxidation particles and the precipitates generated by the reaction to separate from the screen cover 2 and move downward with the water flow. At the same time, under the action of centrifugal force, the filter screen 3 can gather these small particles and precipitates to the inner peripheral wall of the tank 1, which is convenient for subsequent centralized extraction.

[0034] A connecting pipe 5 is provided on one side of the outer periphery of the tank body 1 in the area between each set of mesh cover 2 and filter screen 3. The connecting pipe 5 is connected to the inside of the tank body 1. A valve 9 and a valve 10 are respectively installed at both ends of the connecting pipe 5 to control the opening and closing of the connecting pipe 5 and the flow direction.

[0035] The internal part of the connecting pipe 5 is equipped with a particle screening mechanism 6, which is used to screen the catalyst particles and precipitates extracted from the tank 1 by particle size, and to distinguish relatively large particles (large surface area, still with high catalytic activity) and relatively small particles (fine powder generated by wear or precipitates from antibiotic wastewater oxidation).

[0036] In this embodiment, the particle screening mechanism 6 includes a screen cylinder 61, a partition 62, and a return member. The partition 62 is fixedly fitted inside the connecting pipe 5 and located between valve 9 and valve 10. The screen cylinder 61 is cylindrical in shape, with its outer circumference gradually tapering to one side to form a circular surface with a diameter smaller than the other side of the screen cylinder 61 (i.e., the screen cylinder 61 has a smaller diameter end and a larger diameter main body end). The partition 62 has an opening in the middle that matches the smaller diameter side of the screen cylinder 61, and the screen cylinder 61 is movably connected to the connecting pipe 5 via the return member.

[0037] In this design, the mesh diameter at the smaller diameter end of the screen cylinder 61 is larger than the mesh diameter in other areas of the screen cylinder 61 (where the mesh diameter in other areas is smaller than that of the precipitate after catalytic oxidation of antibiotic wastewater). This differentiated mesh design means that when liquid containing particles enters from the smaller diameter end of the screen cylinder 61 (i.e., the precipitate after catalytic oxidation of antibiotic wastewater and relatively small diameter catalytic oxide particles enter), relatively large particles cannot pass through the mesh at this end (because the precipitate after catalytic oxidation of antibiotic wastewater is relatively small and enters the screen cylinder 61 for collection), but are intercepted outside the screen cylinder 61 (i.e., between the partition 62 and the valve 9), while relatively small particles and liquid can pass through the smaller diameter side of the screen cylinder 61 and enter the interior of the screen cylinder 61.

[0038] The return mechanism includes a guide rod 63, a return spring 64, and a connecting plate 65. The connecting plate 65 is fixedly installed inside the connecting pipe 5. One end of the guide rod 63 is fixedly connected to the screen cylinder 61, and the other end slides through the connecting plate 65. The return spring 64 is movably sleeved on the outer periphery of the guide rod 63 and connected between the connecting plate 65 and the screen cylinder 61. This return mechanism allows the screen cylinder 61 to move within a certain range along the axial direction of the connecting pipe 5 and automatically resets after the external force disappears.

[0039] The particle screening mechanism 6 is connected to the extraction mechanism 7, which includes an extraction pump 71 and a manifold 72. The manifold 72 is connected to the connecting pipe 5 (specifically located in the area between the particle screening mechanism 6 and the valve 10). The suction end of the extraction pump 71 is connected to the manifold 72, and the discharge end of the extraction pump 71 is connected to the pretreatment mechanism 8.

[0040] When it is necessary to recover the catalyst loss particles accumulated in the tank 1, first stop the drive mechanism 4, so that the filter screen 3 tilts towards the connecting pipe 5 under the action of gravity. Then, valve 9 and valve 10 are opened, and pump 71 is started. Under the negative pressure of pump 71, untreated antibiotic wastewater is drawn through the bottom of manifold 72. The loss particles and sediments accumulated on the filter screen 3 in tank 1 are sucked into the connecting pipe 5 and first pass through the smaller diameter end of screen cylinder 61. As mentioned above, relatively large particles are trapped outside screen cylinder 61 (the space between valve 9 and screen cylinder 61), while relatively small particles, precipitates after antibiotic catalytic oxidation, and liquid enter the inside of screen cylinder 61. As pump 71 continues to draw, the number of large particles trapped outside screen cylinder 61 increases, the liquid flow resistance increases, and the screen cylinder 61 is pushed away from the partition 62 (compression of return spring 64). At this time, an annular passage space is formed between the opening of partition 62 and screen cylinder 61, allowing the trapped large particles to pass through this space into manifold 72 and finally be sent to pretreatment mechanism 8. After extraction is completed, valve 9 and valve 10 are closed, and the return spring 64 pushes the screen cylinder 61 to reset.

[0041] The pretreatment unit 8 is used to collect relatively large particles (with large surface area and still catalytic activity) from the extracted particulate matter, and to use these particles to pretreat the fresh antibiotic wastewater to be introduced into the tank 1, thereby realizing the resource reuse of catalyst particles.

[0042] It should be noted that antibiotic wastewater that is usually fed into catalytic oxidation equipment has undergone multiple processes such as filtration and addition of reagents, and the particles and impurities have been treated. When it is fed into catalytic oxidation equipment, the antibiotics are usually treated. In this embodiment, the pretreatment mechanism 8 includes a sleeve 81, an inlet hopper 82, and an auger 83. The sleeve 81 is threadedly connected to the discharge end of the extraction pump 71. The inlet hopper 82 is fixedly fitted inside the sleeve 81 and is funnel-shaped. The auger 83 is installed inside the sleeve 81 and is a hollow structure. The auger 83 has multiple through holes, and its inlet end is connected to the outlet end of the inlet hopper 82. This allows the large particles screened by the manifold 72 to enter the hollow interior of the auger 83 for storage via the inlet hopper 82. Simultaneously, the antibiotic wastewater to be treated enters the sleeve 81 and comes into contact with the large-particle catalyst in the auger 83. The residual catalytic activity of these particles is used to perform preliminary oxidation pretreatment on the wastewater (e.g., decomposing some pollutants or enhancing subsequent biodegradability). The through holes on the auger 83 promote the contact between the wastewater and the particles and also serve as a water distribution mechanism.

[0043] The bottom of tank 1 is connected to a drain valve 14, which is used to discharge the purified wastewater after treatment is completed.

[0044] Regarding the discharge of wastewater from tank 1, wastewater to be treated can be continuously added to the inside of tank 1 through sleeve 81, and then submerged to the top mesh cover 2, and continuously discharged through drain valve 14.

[0045] Example 2 Based on Embodiment 1, in order to allow smaller particles and sediments collected inside the screen cylinder 61 to be discharged periodically and reduce clogging, this embodiment has a discharge valve 11 connected to the connecting pipe 5 between the partition 62 and the valve 9.

[0046] like Figure 5 As shown, the outlet end of the discharge valve 11 can be connected to an external extraction pump (not shown in the figure). When it is necessary to clean the fine particles accumulated inside the screen cylinder 61, close valve 9, keep valve 10 open, start the external extraction pump or use the liquid in the manifold 72 for back suction, and the smaller particles and sediments collected inside the screen cylinder 61 can be extracted from the system through the discharge valve 11 to achieve regular maintenance.

[0047] Example 3 Based on Embodiment 2, in order to further prevent clogging at the smaller diameter end of the screen cylinder 61 and improve the smoothness of particle screening, this embodiment has an axial flow blade 12 rotatably provided at the smaller diameter end of the screen cylinder 61, and brush bristles 13 are connected to the axial flow blade 12.

[0048] like Figure 7As shown, when the liquid (wastewater or backwash liquid) flows through the smaller diameter end of the screen cylinder 61, the liquid drives the axial flow blades 12 to rotate, and the axial flow blades 12 drive the brush bristles 13 to rotate synchronously, continuously brushing the smaller diameter end face of the screen cylinder 61, reducing the adhesion and accumulation of particles at that point, and improving the permeability and screening efficiency of the screen cylinder 61.

[0049] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A catalytic oxidation reactor for treating antibiotic-containing wastewater, comprising a tank (1), characterized in that: The tank (1) is fitted with an inclined mesh cover (2), and the mesh cover (2) contains catalytic oxidation particles. The tank (1) has a sliding sleeve with a filter screen (3) located below the mesh screen cover (2). The tank (1) is equipped with a drive mechanism (4), which is used to drive the mesh screen cover (2) and the filter screen (3) to rotate and move up and down. At least one set of connecting pipes (5) is provided on the outside of the tank (1), and the connecting pipes (5) are connected to the inside of the tank (1); The connecting pipe (5) is equipped with a particle screening mechanism (6), and the particle screening mechanism (6) is connected to an extraction mechanism (7). The extraction mechanism (7) is used to extract the particulate matter generated in the tank (1) due to the loss of catalytic oxidation particles through the connecting pipe (5). The discharge end of the extraction mechanism (7) is connected to a pretreatment mechanism (8), which is used to collect relatively large particles from the extracted particulate matter and use these particles to pretreat the antibiotic wastewater to be introduced into the tank (1).

2. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 1, characterized in that: The drive mechanism (4) includes a drive motor (41), a rotating tube (42), a linear actuator (43), and a drive rod (44). The drive motor (41) is installed on the top of the tank (1). The rotating tube (42) is fixedly fitted with the screen cover (2) and the filter screen (3). The linear actuator (43) is installed at the bottom of the tank (1), and its output end is rotatably connected to the rotating tube (42). The drive rod (44) is connected to the output end of the drive motor (41) and slides into the rotating tube (42). The rotating tube (42) is provided with a groove (421) that is adapted to the drive rod (44).

3. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 1, characterized in that: There are three mesh covers (2), with the top and bottom mesh covers (2) arranged in parallel and inclined directions, and the middle mesh cover (2) in the opposite direction to the top and bottom mesh covers (2).

4. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 1, characterized in that: The connecting pipe (5) is located in the area between the screen cover (2) and the filter screen (3). On the connecting pipe (5), valve one (9) and valve two (10) are respectively located on both sides of the particle screening mechanism (6). The particle screening mechanism (6) includes a screen cylinder (61) and a partition (62). The partition (62) is fixedly installed in the connecting pipe (5). The screen cylinder (61) is movably installed in the connecting pipe (5). One end of the screen cylinder (61) is a gradually shrinking smaller diameter end. The mesh diameter of this smaller diameter end is larger than the mesh diameter of other areas of the screen cylinder (61), so that particles with relatively large surface areas are trapped outside the screen cylinder (61).

5. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 4, characterized in that: The particle screening mechanism (6) also includes a return component, which includes a guide rod (63), a return spring (64) and a connecting plate (65). The connecting plate (65) is fixed inside the connecting pipe (5). One end of the guide rod (63) is connected to the screen cylinder (61), and the other end slides through the connecting plate (65). The return spring (64) is sleeved on the guide rod (63) and connected between the connecting plate (65) and the screen cylinder (61).

6. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 4, characterized in that: The extraction mechanism (7) includes an extraction pump (71) and a manifold (72). The manifold (72) is connected to the connecting pipe (5). The suction end of the extraction pump (71) is connected to the manifold (72), and the discharge end of the extraction pump (71) is connected to the pretreatment mechanism (8).

7. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 6, characterized in that: The pretreatment mechanism (8) includes a sleeve (81), an inlet hopper (82), and an auger (83). The sleeve (81) is connected to the discharge end of the extraction pump (71). The inlet hopper (82) is fixedly installed inside the sleeve (81). The auger (83) is installed inside the sleeve (81) and is connected to the inlet hopper (82). The auger (83) has a hollow structure and has through holes for storing relatively large particles that have been screened out, and for contacting the antibiotic wastewater entering the sleeve (81) with the particles for pretreatment.

8. The catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 4, characterized in that: A discharge valve (11) is connected between the partition (62) and the valve (9) on the connecting pipe (5) for discharging smaller particles and sediments collected inside the screen cylinder (61).

9. A catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 4, characterized in that: An axial flow blade (12) is rotatably provided at the smaller diameter end of the screen cylinder (61), and a brush (13) for agitating the end of the screen cylinder (61) is connected to the axial flow blade (12).

10. A catalytic oxidation reactor for treating antibiotic-containing wastewater according to claim 1, characterized in that: The bottom of the tank (1) is connected to a drain valve (14).

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