Online advanced oxidant preparation system and method

Abstract

The invention belongs to the technical field of oxidant preparation, and particularly relates to an online advanced oxidant preparation system and method, and the system comprises a preparation module, a processing module and a control cabinet; the control cabinet is electrically connected with the preparation module and the processing module and used for controlling operation of the preparation module and the processing module. The preparation module comprises a storage tank, a reaction kettle and a temporary storage tank which are sequentially communicated through a pipeline; a mixing and stirring device and a cleaning assembly are arranged in the reaction kettle, the cleaning assembly comprises a vertical pipe, the vertical pipe is hermetically and slidably assembled on a top cover of the reaction kettle, and a rotary spray head is mounted at the bottom of the vertical pipe; the treatment module comprises an oxidation reaction tank, a sedimentation tank and a solid-liquid separation filter tank which are sequentially communicated through pipelines; the cleaning assembly is arranged to automatically clean the inner wall of the reaction kettle and the surface of the stirring device, so that the manual cleaning cost and the risk caused by non-standard operation are reduced, the service life of the equipment is prolonged, and the cleanliness in the reaction process is kept.

Description

Technical Field

[0001] This invention belongs to the field of oxidant preparation technology, specifically an online advanced oxidant preparation system and method. Background Technology

[0002] With the increasing demands for environmental protection and the expanding applications of advanced oxidants (such as hydroxyl radicals and ozone), the traditional "offline preparation-storage-transportation" oxidant supply model is gradually revealing its limitations. Specifically, some advanced oxidants are chemically unstable and prone to degradation and inactivation during storage, leading to the loss of their effective components. Long-distance transportation also presents safety risks such as leakage and corrosion, while increasing transportation costs. Therefore, online advanced oxidant preparation technology has emerged, enabling an integrated process of "raw material input - immediate preparation - direct application," avoiding problems during storage and transportation, and becoming a core direction for industry development.

[0003] Core equipment in online preparation systems, such as mixers and reactors, typically need to remain completely sealed during long-term operation to ensure raw material purity, prevent oxidants from failing due to contact with air, and avoid leakage of harmful gases. However, after prolonged use, impurities or residual chemical materials (such as catalyst particles and organic raw material deposits) easily accumulate on the inner walls of these devices. Due to the enclosed structure of the equipment, effective cleaning of the reactor interior is difficult, resulting in incomplete removal of impurities. These residues not only affect subsequent mixing processes, reducing oxidant preparation efficiency and reaction purity, but may also trigger secondary reactions, generating harmful byproducts and contaminating the final product.

[0004] Therefore, the present invention provides an online advanced oxidant preparation system and method. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The online advanced oxidant preparation system of the present invention includes a preparation module, a processing module, and a control cabinet; the control cabinet is electrically connected to the preparation module and the processing module respectively, and is used to control the operation of the preparation module and the processing module; The preparation module includes a storage tank, a reaction vessel, and a temporary storage tank connected in sequence by pipes; the reaction vessel is equipped with a mixing and stirring device and a cleaning assembly, the cleaning assembly includes a vertical pipe, the vertical pipe is sealed and slidably assembled on the top cover of the reaction vessel, and a rotating nozzle is installed at the bottom of the vertical pipe; The processing module includes an oxidation reaction tank, a sedimentation tank, and a solid-liquid separation filter tank that are connected in sequence by pipelines; a tubular mixer is provided between the oxidation reaction tank and the reaction vessel, and the two ends of the tubular mixer are respectively sealed to the oxidation reaction tank and the reaction vessel by pipelines.

[0007] Preferably, a main drainage pipe is installed at the bottom of the reactor, and a branch pipe is connected to the main drainage pipe. A gate valve is provided on the branch pipe. The branch pipe is also connected to a detection pipe. A drainage branch pipe is fixedly connected to the side wall of the detection pipe. A detection sensor for monitoring the quality of the drain water is provided inside the detection pipe. The detection end of the detection sensor extends into the detection pipe to determine whether the reactor is clean through water quality data.

[0008] Preferably, the detection tube is provided with a cleaning component for cleaning impurities adhering to the detection end surface of the detection sensor. The cleaning component includes a mounting bracket fixed inside the detection tube. A mounting shaft is rotatably mounted in the middle of the mounting bracket. One end of the mounting shaft extends into the inside of the diverter tube and an impeller is fixed to the end. An L-shaped movable rod is fixed to the other end. A brush is provided on the side wall of the long part of the movable rod.

[0009] Preferably, a sensing sensor is also provided on the side wall of the detection tube, and the sensing sensor and the detection sensor are arranged alternately.

[0010] Preferably, the detection tube is further provided with a stop bar parallel to the long rod portion of the movable rod.

[0011] Preferably, a groove is provided in the middle of the long rod of the movable rod, a slider is slidably disposed in the groove, the brush is fixed on the slider, and a drive component is provided on the movable rod for driving the brush to reciprocate along the length of the long rod.

[0012] Preferably, the drive assembly includes a reciprocating lead screw parallel to the inner side of the long rod of the movable rod, a moving block fixed on the side of the slider away from the brush, the moving block being threaded onto the reciprocating lead screw, an mounting sleeve sleeved on the outer side of the mounting shaft near the movable rod, a gear ring fixed on the inner wall of the mounting sleeve, a rotating shaft rotatably mounted on the short rod of the movable rod, the rotating shaft extending into the mounting sleeve and having a gear fixed at its end, the gear meshing with the gear ring, an installation cavity formed inside the short rod of the movable rod, the ends of the rotating shaft and the reciprocating lead screw near the short rod of the movable rod extending into the installation cavity respectively, and the rotating shaft and the reciprocating lead screw being connected by a transmission belt.

[0013] Preferably, the mounting sleeve is fixedly connected to the mounting bracket via a connecting rod.

[0014] An online advanced oxidant preparation method, applicable to the above-mentioned online advanced oxidant preparation system, includes the following steps: S1. The preparation module is started through the control cabinet, which controls the oxidant preparation raw materials in the storage tank to be transported to the reactor through the pipeline; at the same time, the control cabinet adjusts the mixing and stirring device in the reactor to start, and mixes the raw materials and catalyst to carry out the oxidant preparation reaction; S2. After the reaction in the reactor is completed, the control cabinet controls the material prepared in the reactor to be transported to the temporary storage tank through the pipeline for temporary storage; then the material in the temporary storage tank is controlled to be transported through the tubular mixer. If necessary, the operating parameters of the tubular mixer are adjusted to transport the material to the oxidation reaction tank. S3. An oxidation reaction is carried out in the oxidation reaction tank. After the oxidation reaction is completed, the reacted material is transported through a pipeline to a sedimentation tank for solid-liquid sedimentation and separation. The liquid obtained is the required advanced oxidant. The precipitated material is then transported through a pipeline to a solid-liquid separation filter for deep solid-liquid separation.

[0015] The beneficial effects of this invention are as follows: 1. The online advanced oxidant preparation system and method of the present invention, through the automated control of the entire process by setting up a control cabinet, including preparation, processing and cleaning modules, can efficiently and accurately control the operation of each link, reduce manual intervention, and improve production efficiency and operational accuracy; in addition, by setting up a cleaning component to automatically clean the inner wall of the reactor and the surface of the stirring device, the cost of manual cleaning and the risks caused by non-standard operation are reduced, the service life of the equipment is extended, and the cleanliness of the reaction process is maintained.

[0016] 2. The online advanced oxidant preparation system and method of the present invention monitors the quality of cleaning wastewater by setting up structures such as branch pipes, detection pipes, and detection sensors. The control cabinet determines whether the inside of the reactor is clean through water quality data. Through automated control and data feedback, the cleaning process is precisely managed, reducing the possibility of human intervention and avoiding operational errors, thereby ensuring the efficiency and accuracy of the cleaning process. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the advanced oxidant preparation process in this invention. Figure 2 This is a perspective view of the reaction vessel in this invention; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the internal structure of the detection tube in this invention; Figure 5 yes Figure 3 Enlarged view of point A in the middle; Figure 6 This is a cross-sectional view of the detection tube in this invention; Figure 7 yes Figure 5 Enlarged view at point B in the middle; Figure 8 yes Figure 5 Enlarged view at point C; Figure 9 This is a flowchart of the method of the present invention; Figure 10 This is a schematic diagram of the process between the various devices in the preparation system of the present invention; In the diagram: 1. Reactor; 2. Vertical pipe; 3. Rotary nozzle; 4. Main drainage pipe; 5. Diversion pipe; 6. Gate valve; 7. Detection pipe; 8. Drainage branch pipe; 9. Detection sensor; 10. Induction sensor; 11. Mounting bracket; 12. Mounting cavity; 13. Mounting shaft; 14. Impeller; 15. Movable rod; 16. Brush; 17. Stop bar; 18. Mounting sleeve; 19. Fixed rod; 20. Reciprocating screw; 21. Rotating shaft; 22. Gear; 23. Gear ring; 24. Drive belt; 25. Slide groove; 26. Sliding block; 27. Moving block. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1 to 8 and Figure 10 As shown, the online advanced oxidant preparation system of the present invention includes a preparation module, a processing module, and a control cabinet; the control cabinet is electrically connected to the preparation module and the processing module respectively, and is used to control the operation of the preparation module and the processing module. The preparation module includes a storage tank, a reaction vessel 1, and a temporary storage tank connected in sequence by pipes; the reaction vessel 1 is equipped with a mixing and stirring device and a cleaning assembly. The cleaning assembly includes a vertical pipe 2, which is sealed and slidably mounted on the top cover of the reaction vessel 1. The top of the vertical pipe 2 is connected to an external water source and its lifting and lowering are controlled by a hydraulic cylinder. A rotating nozzle 3 is installed at the bottom of the vertical pipe 2. The processing module includes an oxidation reaction tank, a sedimentation tank, and a solid-liquid separation filter tank that are connected in sequence by pipelines; a tubular mixer is provided between the oxidation reaction tank and the reaction vessel 1, and the two ends of the tubular mixer are respectively sealed to the oxidation reaction tank and the reaction vessel 1 by pipelines; During operation, the preparation module is activated via the control cabinet, and the raw materials for oxidant preparation (such as potassium hydroxide, sodium hypochlorite or calcium hypochlorite, ferric sulfate / ferric chloride / ferric nitrate, water, etc.) and catalyst stored in the storage tank are proportionally transferred to reactor 1. Simultaneously, the control cabinet activates the mixing and stirring device in reactor 1 to stir and mix the raw materials and catalyst, initiating the oxidant preparation reaction. After the reaction is completed, the control cabinet transfers the reaction product to a temporary storage tank for temporary storage. Subsequently, according to processing requirements, the material in the temporary storage tank is transferred to the oxidation reaction tank via a tubular mixer, and the operating parameters of the tubular mixer can be adjusted to optimize the mixing effect. After the oxidation reaction is completed in the oxidation reaction tank, the material sequentially enters the sedimentation tank for preliminary solid-liquid separation, and then enters the solid-liquid separation filter tank for deep separation, ultimately obtaining the target oxidant product (potassium ferrate). After the oxidant preparation and treatment process is completed, the cleaning component is controlled by the control cabinet: water is supplied to the vertical pipe 2 through an external water source, and the vertical pipe 2 is driven to slide along the top cover seal of the reactor 1 by a hydraulic cylinder (not shown in the figure) located on the outside of the reactor 1. The position of the rotating nozzle 3 at the bottom of the vertical pipe 2 is adjusted, and the cleaning medium is introduced into the rotating nozzle 3. The rotating nozzle 3 rotates and sprays the cleaning medium to automatically clean the inner wall of the reactor 1 and the surface of the mixing and stirring device. The rotating nozzle 3 and the hydraulic cylinder are both existing technologies, and their specific structures and working principles are known to those skilled in the art. Therefore, they will not be described in detail here. The automated control of the entire process, including the preparation, processing, and cleaning modules, through the control cabinet, enables efficient and precise control of each step, reducing manual intervention and improving production efficiency and operational accuracy.

[0021] In another embodiment of the present invention, a main drainage pipe 4 is installed at the bottom of the reactor 1, and a branch pipe 5 is connected to the main drainage pipe 4. A gate valve 6 is provided on the branch pipe 5. The branch pipe 5 is also connected to a detection pipe 7. A drainage branch pipe 8 is fixedly connected to the side wall of the detection pipe 7. A detection sensor 9 for monitoring the quality of the drain water is provided inside the detection pipe 7. The detection end of the detection sensor 9 extends into the inside of the detection pipe 7 to determine whether the inside of the reactor 1 is clean through water quality data. During operation, in the cleaning process, the gate valve 6 of the branch pipe 5 on the main drain pipe 4 at the bottom of the reactor 1 is opened, allowing the cleaning wastewater in the reactor 1 to be discharged from the main drain pipe 4. Some of the wastewater flows into the detection pipe 7 through the branch pipe 5 and is discharged from the drain branch pipe 8. The detection sensor 9 in the detection pipe 7 monitors the quality of the cleaning wastewater. The detection sensor 9 can be a turbidity sensor. By illuminating suspended particles in the liquid with a light source, the intensity of the scattered light is used to calculate the turbidity or suspended solids concentration of the liquid. The water quality data is transmitted to the control cabinet. The control cabinet uses the water quality data to determine whether the reactor 1 is clean. If the control cabinet determines that the reactor 1 has been cleaned to the standard, it controls all equipment to stop operating, opens the gate valve 6 of the main drain pipe 4 and the branch pipe 5, and drains the residual liquid in the system, completing this online advanced oxidant preparation process. Through automated control and data feedback, precise management of the cleaning process is achieved, reducing the possibility of human intervention and avoiding operational errors, thereby ensuring the efficiency and accuracy of the cleaning process.

[0022] In another embodiment of the present invention, a cleaning assembly is provided inside the detection tube 7 for cleaning impurities adhering to the detection end surface of the detection sensor 9. The cleaning assembly includes a mounting bracket 11 fixed inside the detection tube 7. A mounting shaft 13 is rotatably mounted in the middle of the mounting bracket 11. One end of the mounting shaft 13 extends into the inside of the diversion tube 5 and an impeller 14 is fixed to the end. An L-shaped movable rod 15 is fixed to the other end. A brush 16 is provided on the side wall of the long part of the movable rod 15. During operation, wastewater flows through the diversion tube 5, and the water flow drives the impeller 14 to rotate, which in turn drives the movable rod 15 to rotate through the mounting shaft 13. The movable rod 15 drives the brush 16 to rotate. When the brush 16 sweeps across the detection end surface of the detection sensor 9, it can effectively clean the impurities adhering to the detection end surface, so as to keep the detection end clean and avoid impurities causing errors in the detection results.

[0023] In another embodiment of the present invention, a sensing sensor 10 is also provided on the side wall of the detection tube 7, and the sensing sensor 10 and the detection sensor 9 are arranged alternately; both the sensing sensor 10 and the detection sensor 9 are electrically connected to the control cabinet. During operation, the sensing sensor 10 can be a proximity sensor. The sensing sensor 10 monitors the position of the movable rod 15. By staggering the sensing sensor 10 and the detection sensor 9, when the long part of the movable rod 15 passes the sensing sensor 10 during rotation, the sensing sensor 10 sends a signal to the control cabinet. The control cabinet activates the detection sensor 9 based on the received signal. At this time, the long part of the movable rod 15 and the detection end of the detection sensor 9 are staggered, preventing obstruction of the detection sensor 9's detection of the turbidity of the wastewater in the detection tube 7. Afterward, the movable rod 15 drives the brush 16 completely past the sensing sensor 10. At this point, the detection sensor 9 pauses its detection process. Furthermore, as the movable rod 15 drives the brush 16 past the detection sensor 9, it simultaneously cleans the impurities adhering to its surface. In addition, the movable rod 15 can agitate the wastewater inside the detection tube 7, making the impurities in the wastewater more evenly distributed, thus making the turbidity detection results more accurate.

[0024] In another embodiment of the present invention, the detection tube 7 is further provided with a stop bar 17 parallel to the long rod portion of the movable rod 15. During operation, the stop bar 17 is positioned on the movement path of the brush 16 to ensure that the brush 16 can contact the stop bar 17 during the synchronous rotation driven by the movable rod 15. When the brush 16 moves along the predetermined path and passes the stop bar 17, the brush 16 is compressed and deformed to a certain extent due to the obstruction of the stop bar 17. After passing the stop bar 17, the brush 16 returns to its initial state. This deformation and recovery process causes the bristles of the brush 16 to oscillate, thereby shaking off the impurities attached to the bristles and achieving the purpose of automatic cleaning, thus ensuring that the brush 16 maintains a good cleaning effect during use.

[0025] In another embodiment of the present invention, a groove 25 is provided in the middle of the long rod portion of the movable rod 15, a slider 26 is slidably disposed in the groove 25, the brush 16 is fixed on the slider 26, and a drive assembly for driving the brush 16 to reciprocate along the length of the long rod portion is provided on the movable rod 15. The drive assembly includes a reciprocating lead screw 20 parallel to the inner side of the long rod portion of the movable rod 15. A moving block 27 is fixed on the side of the slider 26 away from the brush 16. The moving block 27 is threadedly connected to the reciprocating lead screw 20. An mounting sleeve 18 is sleeved on the outer side of the mounting shaft 13 near the movable rod 15. A gear ring 23 is fixed on the inner wall of the mounting sleeve 18. A rotating shaft 21 is rotatably mounted on the short rod portion of the movable rod 15. The rotating shaft 21 extends into the mounting sleeve 18 and a gear 22 is fixed at its end. The gear 22 meshes with the gear ring 23. An installation cavity 12 is opened inside the short rod portion of the movable rod 15. The ends of the rotating shaft 21 and the reciprocating lead screw 20 near the short rod portion of the movable rod 15 extend into the installation cavity 12, and the rotating shaft 21 and the reciprocating lead screw 20 are connected by a transmission belt 24. The mounting sleeve 18 is fixedly connected to the mounting bracket 11 via the connecting rod 19; During operation, the movable rod 15 is driven to rotate by the mounting shaft 13. The movable rod 15 drives the gear 22 to roll along the gear ring 23, which in turn causes the rotating shaft 21 to rotate. Subsequently, the reciprocating screw 20 is driven to rotate by the transmission belt 24. Since the slider 26 is confined within the slide groove 25, the moving block 27 can only move linearly back and forth along the reciprocating screw 20, thereby causing the slider 26 and the brush 16 to change positions along the slide groove 25. In this way, the detection end of the detection sensor 9 will contact different parts of the brush 16, so that the impurities on the detection end are dispersed at different positions of the brush 16, avoiding concentration in one place, thereby reducing the difficulty of automatic cleaning of the brush 16.

[0026] like Figure 9 As shown, an online advanced oxidant preparation method, applicable to the above-mentioned online advanced oxidant preparation system, includes the following steps: S1. The preparation module is started through the control cabinet, and the raw materials for oxidant preparation in the storage tank are transported to the reactor 1 through the pipeline; at the same time, the control cabinet adjusts the mixing and stirring device in the reactor 1 to start, and the raw materials and catalyst are stirred and mixed to carry out the oxidant preparation reaction; S2. After the reaction in reactor 1 is completed, the control cabinet controls the material prepared in reactor 1 to be transported to a temporary storage tank via pipeline for temporary storage; then controls the material in the temporary storage tank to be transported via a tubular mixer, and adjusts the operating parameters of the tubular mixer as necessary to transport the material to the oxidation reaction tank. S3. An oxidation reaction is carried out in the oxidation reaction tank. After the oxidation reaction is completed, the reacted material is transported through a pipeline to a sedimentation tank for solid-liquid sedimentation and separation. The liquid obtained is the required advanced oxidant. The precipitated material is then transported through a pipeline to a solid-liquid separation filter for deep solid-liquid separation.

[0027] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0028] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online advanced oxidant preparation system, characterized in that: It includes a preparation module, a processing module, and a control cabinet; the control cabinet is electrically connected to the preparation module and the processing module respectively, and is used to control the operation of the preparation module and the processing module. The preparation module includes a storage tank, a reaction vessel (1) and a temporary storage tank connected in sequence by pipes; the reaction vessel (1) is equipped with a mixing and stirring device and a cleaning component, the cleaning component includes a vertical pipe (2), the vertical pipe (2) is sealed and slidably assembled on the top cover of the reaction vessel (1), and a rotating nozzle (3) is installed at the bottom of the vertical pipe (2). The processing module includes an oxidation reaction tank, a sedimentation tank and a solid-liquid separation filter tank that are connected in sequence by pipelines; a tubular mixer is provided between the oxidation reaction tank and the reaction vessel (1), and the two ends of the tubular mixer are respectively sealed to the oxidation reaction tank and the reaction vessel (1) by pipelines.

2. The online advanced oxidant preparation system according to claim 1, characterized in that: The bottom of the reactor (1) is equipped with a main drain pipe (4), and a branch pipe (5) is connected to the main drain pipe (4). A gate valve (6) is provided on the branch pipe (5). The branch pipe (5) is also connected to a detection pipe (7). A drain branch pipe (8) is fixedly connected to the side wall of the detection pipe (7). A detection sensor (9) for monitoring the quality of the drain water is provided inside the detection pipe (7). The detection end of the detection sensor (9) extends into the detection pipe (7) to determine whether the reactor (1) is clean through water quality data.

3. The online advanced oxidant preparation system according to claim 2, characterized in that: The detection tube (7) is equipped with a cleaning component for cleaning impurities attached to the detection end surface of the detection sensor (9). The cleaning component includes a mounting bracket (11) fixed inside the detection tube (7). A mounting shaft (13) is rotatably mounted in the middle of the mounting bracket (11). One end of the mounting shaft (13) extends into the inside of the diversion tube (5) and an impeller (14) is fixed on the end. An L-shaped movable rod (15) is fixed on the other end. A brush (16) is provided on the side wall of the long rod of the movable rod (15).

4. The online advanced oxidant preparation system according to claim 3, characterized in that: A sensing sensor (10) is also provided on the side wall of the detection tube (7), and the sensing sensor (10) and the detection sensor (9) are arranged alternately.

5. The online advanced oxidant preparation system according to claim 4, characterized in that: The detection tube (7) is also equipped with a stop bar (17) that is parallel to the long rod of the movable rod (15).

6. The online advanced oxidant preparation system according to claim 5, characterized in that: The movable rod (15) has a groove (25) in the middle of its long rod section. A slider (26) is slidably arranged in the groove (25). The brush (16) is fixed on the slider (26). The movable rod (15) is provided with a drive assembly for driving the brush (16) to reciprocate along the length of the long rod section.

7. The online advanced oxidant preparation system according to claim 6, characterized in that: The drive assembly includes a reciprocating lead screw (20) parallel to the inner side of the long rod of the movable rod (15). A moving block (27) is fixed on the side of the slider (26) away from the brush (16). The moving block (27) is threaded onto the reciprocating lead screw (20). An mounting sleeve (18) is fitted on the outer side of the mounting shaft (13) near the movable rod (15). A toothed ring (23) is fixed on the inner wall of the mounting sleeve (18). A rotating part is rotatably mounted on the short rod of the movable rod (15). Shaft (21), the shaft (21) extends into the mounting sleeve (18) and a gear (22) is fixed at the end. The gear (22) meshes with the gear ring (23). The short rod of the movable rod (15) has an installation cavity (12). The ends of the shaft (21) and the reciprocating screw (20) near the short rod of the movable rod (15) extend into the installation cavity (12) respectively. The shaft (21) and the reciprocating screw (20) are connected by a transmission belt (24).

8. The online advanced oxidant preparation system according to claim 7, characterized in that: The mounting sleeve (18) is fixedly connected to the mounting bracket (11) via a connecting rod (19).

9. An online method for preparing advanced oxidants, applicable to the online advanced oxidant preparation system of claim 8, characterized in that: Includes the following steps: S1. Start the preparation module through the control cabinet to control the oxidant preparation raw materials (including raw materials and catalysts) in the storage tank to be transported to the reactor (1) through the pipeline; at the same time, the control cabinet adjusts the mixing and stirring device in the reactor (1) to stir and mix the raw materials and catalysts to carry out the oxidant preparation reaction; S2. After the reaction in the reactor (1) is completed, the control cabinet controls the material prepared in the reactor (1) to be transported to the temporary storage tank through the pipeline for temporary storage; then controls the material in the temporary storage tank to be transported through the tubular mixer, and adjusts the operating parameters of the tubular mixer (such as water injection to adjust the solid content) when necessary, and transports the material to the oxidation reaction tank. S3. An oxidation reaction is carried out in the oxidation reaction tank. After the oxidation reaction is completed, the reacted material is transported through a pipeline to a sedimentation tank for solid-liquid sedimentation and separation. The liquid obtained is the required advanced oxidant. The precipitated material is then transported through a pipeline to a solid-liquid separation filter for deep solid-liquid separation.

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