Uniform spraying function of a reaction kettle with anti-blocking wear-resistant submerged pump

Abstract

The application discloses a kind of anti-blocking wear-resistant liquid submerged pumps with uniform spraying function for reaction kettle, including the liquid submerged pump main body immersed in reaction kettle, the liquid submerged pump main body includes pump body, impeller, pump shaft, the pump body front end is provided with pump body inlet, the flow channel of the pump body adopts annular water compression chamber, the impeller is placed in water compression chamber side and is installed on the pump shaft, the pump body water compression chamber forms bladeless cavity, the pump body is provided with tangential outlet flow channel at water compression chamber, the tangential outlet flow channel is communicated with the outlet spraying pipeline along the axial direction of reaction kettle in reaction kettle, nozzle is installed on the outlet spraying pipeline.The characteristics of the present application are: it can realize the efficient pumping of the catalyst deposited at the bottom of the reaction kettle, the low-wear conveying of the solid-liquid two-phase medium, and the uniform dispersion and spraying of the catalyst in the reaction kettle, greatly improving the catalytic reaction efficiency, with the characteristics of no leakage, long-period operation and high reliability.

Description

Technical Field

[0001] This invention relates to the technical field of chemical fluid machinery and related equipment, specifically to an anti-clogging and wear-resistant submersible pump with uniform spraying function for conveying solid-liquid two-phase media containing high-density solid catalysts. It can be widely used in the self-circulation of materials and catalytic reaction conditions inside reactors in industries such as petrochemicals, fine chemicals, pharmaceuticals, and new energy material synthesis. Background Technology

[0002] Stirred reactors are widely used in petrochemical, fine chemical, pharmaceutical, dye, and new material preparation industries. Many reaction processes involve the mixing and catalytic reaction of solid and liquid two-phase media. For example, in hydrogenation, oxidation, and esterification reactions, solid catalysts (such as Raney nickel, molecular sieves, and noble metal supported catalysts) are often suspended in the liquid medium to participate in the reaction. However, since the specific gravity of solid catalysts is usually much greater than that of liquid media, they are prone to agglomerate at the bottom of the reactor under gravity, leading to uneven catalyst distribution, excessively high local concentrations, decreased reaction efficiency, and even side reactions or catalyst deactivation.

[0003] Traditional solutions to the above problems include: installing a mechanical agitator inside the reactor, using an external circulation pipeline, or employing a bottom-suction circulation pump. However, mechanical agitation has limited ability to disturb the catalyst settling at the bottom, and for reactors with a large height-to-diameter ratio, an excessively long agitator shaft can easily cause vibration and seal leakage risks. Although external circulation pipelines can force circulation, catalyst is prone to depositing and clogging at pipe bends and valves, and long-distance transport causes severe particle wear. When conventional centrifugal pumps transport solid-liquid two-phase media, the high-speed impact of solid catalyst particles on the impeller causes rapid blade wear, and particles easily clog the flow channels, resulting in a sharp drop in pump efficiency.

[0004] Currently, it is impossible to simultaneously meet the multiple requirements of "efficient catalyst extraction from the bottom of the reactor, anti-clogging, wear-resistant, and long-term operation". Therefore, there is an urgent need to develop a special pump device that is suitable for the solid-liquid medium working conditions of the reactor containing catalyst. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an anti-clogging and wear-resistant submersible pump for a reaction vessel with uniform spraying function.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned objective is as follows: a clogging-resistant and wear-resistant submersible pump for a reactor with uniform spraying function, comprising a submersible pump body immersed in the reactor, the submersible pump body comprising a pump body, an impeller, and a pump shaft, the pump body having a pump body inlet at the front end, the pump body having an annular pressure chamber for the flow channel, the impeller being placed on the side of the pressure chamber and mounted on the pump shaft, the pressure chamber of the pump body forming a bladeless cavity, the pump body having a tangential outlet flow channel at the pressure chamber, the tangential outlet flow channel being connected to an outlet spray pipe arranged along the axial direction of the reactor within the reactor, and a nozzle being installed on the outlet spray pipe.

[0007] The impeller is a fully open swirl impeller, the blades of the impeller are swept blades, the working surface of the blades is machined with a radius of R3-R6 at the inlet, the thickness of the blades is 1.5-2 times the theoretical thickness calculated for strength, the inlet installation angle of the blades is 10°-30°, and the inclination angle of the blades is 10°-20°.

[0008] The pump body inlet is equipped with an inlet collection section, which adopts an inward-expanding flared mouth structure. The flared mouth expansion angle of the inlet collection section is 60°-75°, the inlet diameter of the flared mouth of the inlet collection section is 3-5 times the nominal diameter of the pump body inlet, and the distance between the flared mouth inlet end of the inlet collection section and the bottom of the reactor is 0.2-0.4 times the diameter of the pump body inlet.

[0009] The tangential outlet flow channel is connected to the outlet spray pipeline in sequence through a straight pipe section and a 90° elbow. The tongue of the tangential outlet flow channel is machined with a rounded corner of R8-R16.

[0010] The outlet spray pipeline includes a steel pipe with a cap fixed at one end and the other end connected to the tangential outlet flow channel via a flange. A layer of nozzles is arranged along the axial direction at intervals of 0.2-0.4m on the outlet spray pipeline.

[0011] The nozzle is at a 90° angle to the outlet spray pipe. The nozzle includes an outer substrate and an inner bushing, which are fitted together and welded into one piece. The outer substrate is connected to the outlet spray pipe through a threaded structure. The flow channel of the inner bushing adopts a conical inward and outward expansion structure.

[0012] The pump shaft is driven by a magnetic drive mechanism located in the non-immersion zone of the reactor. The magnetic drive mechanism includes an outer magnetic rotor, an isolation sleeve, and an inner magnetic rotor that are sequentially mounted. The outer magnetic rotor is directly connected to the drive motor, and the inner magnetic rotor is directly connected to the pump shaft. When the drive motor drives the outer magnetic rotor to rotate, the rotating magnetic field generated penetrates the isolation sleeve and drives the inner magnetic rotor to rotate synchronously.

[0013] The pump shaft is fitted with a double bearing support structure between the magnetic drive mechanism and the reactor. The double bearing support structure is connected to a nitrogen sealing system. The double bearing support structure includes a bearing housing. The two ends of the bearing housing are respectively connected to the magnetic drive mechanism and the reactor. A cylindrical roller bearing is installed in the bearing housing near the magnetic drive mechanism, and an angular contact ball bearing is installed in the bearing housing near the reactor.

[0014] The present invention is characterized by: efficient suction of catalyst deposited at the bottom of the reactor, non-clogging and low-wear transportation of solid-liquid two-phase media, and uniform dispersion and spraying of catalyst in the reactor, which greatly improves the efficiency of catalytic reaction and features leak-free operation, long cycle operation and high reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram illustrating the working principle of the present invention; Figure 3 This is a schematic diagram of the pump body structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the pump body structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the impeller structure of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the impeller structure of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the structure at the inlet collection section of the present invention; Figure 8 This is a schematic diagram of the outlet spray pipe structure of the present invention; Figure 9 This is a schematic diagram of the spray principle of the outlet spray pipe of the present invention; Figure 10 This is a schematic diagram of the nozzle structure of the present invention.

[0016] The components include: 1. Reactor; 2. Pump body; 21. Pump inlet; 22. Pressure chamber; 23. Front wall; 24. Tangential outlet flow channel; 25. Straight pipe section; 26. 90° elbow; 27. Tongue; 3. Impeller; 31. Blade; 4. Pump shaft; 41. Shell; 5. Inlet collection section; 6. Outlet spray pipeline; 61. Steel pipe; 62. End cap; 63. Flange; 64. Fixed bracket; 7. Nozzle; 71. Outer substrate; 72. Inner bushing; 8. Magnetic drive mechanism; 81. Outer magnetic rotor; 82. Isolation sleeve; 83. Inner magnetic rotor; 84. Drive motor; 9. Double bearing support structure; 91. Bearing seat; 92. Cylindrical roller bearing; 93. Angular contact ball bearing; 10. Nitrogen sealing system. Detailed Implementation

[0017] like Figure 1-10 As shown, this invention is an anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function. It includes a submersible pump body immersed in the reactor 1. The submersible pump body includes a pump body 2, an impeller 3, and a pump shaft 4. The pump body 2 has a pump inlet 21 at its front end, which is vertically downwards and directly opposite the bottom of the reactor 1, allowing direct suction of catalyst particles settled at the bottom of the reactor, preventing material accumulation. The flow channel of the pump body 2 adopts an annular pressure chamber 22, and the impeller 3 is retracted. The impeller 3 is placed on the side of the pressure chamber 22 and mounted on the pump shaft 4. The pressure chamber 22 of the pump body 2, i.e., the front end of the impeller 3, forms a bladeless cavity between the front wall 23 of the pump body 2. The front wall 23 of the pump body 2 has a planar structure with no dead corners or grooves, which can completely avoid catalyst accumulation. The width of the bladeless cavity is 1.1-1.5 times the width of the impeller 3, ensuring that the catalyst particles form a high-speed swirling flow in the bladeless cavity, realizing strong mixing of the solid and liquid phases, and simultaneously completing the premixing reaction during the transportation process. Simultaneously, the swirling flow field allows large-diameter catalyst particles to move close to the front wall 23 of the pump body 2. The cross-section of the flow channel of the pump body 2 adopts a fully circular structure, with a consistent channel width throughout, without contraction sections or sharp angles, which can effectively reduce turbulent wear within the channel. When the impeller 3 rotates, it can form a forced circulating swirling flow in the bladeless cavity. A low-pressure zone is formed in the middle of the circulating swirling flow. High-density catalyst particles enter this zone under the action of gravity and pressure difference and flow out directly with the circulating swirling flow, so that most of the solid catalyst does not pass through the impeller 3 channel, reducing the impact wear between particles and impeller 3 from the source, and completely avoiding channel blockage. The submersible pump is designed to have a flow rate of 5-10 times the volume of the reactor 1 per hour to ensure the catalytic reaction rate of the medium in the reactor 1. The submersible pump is designed to have a head of (reactor height + reactor diameter) × 1.5 to ensure that the spray catalytic effect meets expectations. The submersible pump speed is designed to be 300-500 r / min to reduce wear on the impeller 3 and the pump body 2.

[0018] The pump body 2 has 4-6 tangential outlet channels 24 located in the pressure chamber 22. The tangential outlet channels 24 are tangentially led out along the swirling direction, which can adapt to the swirling state of the medium and reduce flow resistance and particle impact wear. The tongue 27 of the tangential outlet channels 24 is machined with a radius of R8-R16 to alleviate turbulence and particle impact wear at the tongue 27. The tangential outlet channels 24 are connected to the outlet spray pipe 6 arranged along the axial direction of the reactor 1 in the reactor 1 through a straight pipe section 25 and a 90° bend 26 in sequence. The straight pipe section 25 connected to the tangential outlet channels 24 adopts the shortest path design and has no sudden diameter change structure. The outlet bend adopts a 90° bend 26 structure that is tangential to the straight pipe section 25, which can minimize the impact wear of solid catalyst particles and maintain the mixing state of the solid and liquid phases, providing a basis for subsequent uniform spraying.

[0019] The impeller 3 is a fully open swirl impeller, and the blades 31 of the impeller 3 are swept blades, with 4-6 blades in total. The swept blade structure optimizes the inlet flow field of the impeller 3, reduces inlet impact loss of the blades 31, improves the pump's anti-cavitation performance and hydraulic efficiency, and simultaneously reduces the impact angle between solid catalyst particles and the blades 31, significantly reducing impact wear of the blades 31. The working surface of the blades 31 is machined with a rounded corner structure of R3-R6 at the inlet, which can effectively alleviate turbulent erosion at the inlet edge while maintaining hydraulic efficiency. The blades 31 are thickened and wear-resistant, with a thickness of 1.5-2 times the theoretical thickness calculated for strength. The impeller 3 has a service life of 10°-30° with a sufficient wear resistance margin. The inlet placement angle θ of the blade 31 is about 10°-30° and the tilt angle φ of the blade 31 is about 10°-20°. This combination of parameters can maximize the passability of the solid catalyst and the wear resistance of the impeller 3 while ensuring the hydraulic efficiency of the impeller 3, making it suitable for conveying high specific gravity solid-liquid two-phase media.

[0020] The pump inlet 21 is equipped with an inlet collection section 5 to address the issues of high-density catalysts easily settling and stratifying, and the potential for eddies, gas binding, and blockages during pump intake. This ensures priority suction of the dense-phase catalyst at the bottom, preventing the pump from only drawing the upper clear liquid, guaranteeing uniform entry of both solid and liquid phases into the pump chamber, and improving catalytic reaction efficiency. The inlet collection section 5 adopts an inward-expanding horn-shaped structure and can be equipped with a flow stabilizer. After radial suction, the medium transitions to axial entry into the pump body 2 cavity. The horn-shaped expansion angle of the inlet collection section 5 is 60°-75°. The inlet diameter is 3-5 times the nominal diameter of the pump body inlet 21, which can greatly expand the suction range and achieve efficient suction of the catalyst in the entire bottom area of ​​the reactor. The distance between the funnel-shaped inlet end of the inlet collection section 5 and the bottom of the reactor 1 is 0.2-0.4 times the diameter of the pump body inlet 21. The smaller the distance, the stronger the inlet suction. Through this structural design, the medium flow rate at the inlet of the suction section can be controlled in the optimal range of 1.5-2.5 m / s, ensuring that the settled solid catalyst can be fully mixed with the medium and stably enter the pump, avoiding the problems of solid-liquid stratification and inlet blockage.

[0021] The number of outlet spray pipes 6 is consistent with the number of tangential outlet channels 24 of pump body 2, which is 4 to 6 sets. Each set of outlet spray pipes 6 includes a steel pipe 61. The steel pipe 61 is arranged along the axial direction of the reactor 1 and fixed to the housing 41 outside the pump shaft 4 by a fixing bracket 64. One end of the steel pipe 61 is fixed with a cap 62, and the other end is connected to the flange of the 90° elbow 26 through a flange 63. Each set of steel pipes 61 is provided with a layer of nozzles 7 at axial intervals of 0.2-0.4m. The spray angle of each layer of nozzles 7 is designed to match the radial cross-sectional area of ​​the reactor 1, the number of outlet spray pipes 6, and the number of nozzles 7 in a single set of outlet spray pipes 6. This ensures that the medium containing the catalyst can be uniformly sprayed into the medium inside the reactor in layers along the axial direction and with full radial coverage, so that the catalyst and the reaction medium can fully contact each other and the catalytic reaction efficiency can be greatly improved.

[0022] The nozzle 7 forms a 90° angle with the outlet spray pipe 6. During the spraying process, the medium containing the catalyst in the reactor 1 changes in flow velocity and direction, causing rapid wear at the nozzle 7. Therefore, the nozzle 7 adopts a split wear-resistant structure to solve the problem of nozzle 7 erosion and wear when high-solids content medium passes through at high speed, while optimizing the spraying effect. The nozzle 7 includes an outer substrate 71 and an inner bushing 72, which are fitted together and welded into one piece. The outer substrate 71 is a metal substrate and is connected to the outlet spray pipe 6 through a threaded structure for easy disassembly and replacement. The inner bushing 72 is made of pressureless sintered silicon carbide with a Rockwell hardness of HRA≥90, which has extremely high wear resistance and erosion resistance, and can significantly extend the service life of the nozzle 7. The flow channel of the inner bushing 72 adopts a conical inward and outward expansion structure, which can make the sprayed medium form a stable fan-shaped atomized spray pattern, greatly increasing the contact area between the catalyst and the reaction medium, and further enhancing the catalytic reaction effect.

[0023] The submersible pump integrates a magnetic drive mechanism 8, a nitrogen sealing system 10, and a double-bearing support structure on its upper side. It is integrally positioned in the non-submerged area at the top of the reactor 1, completely resolving issues of media leakage and bearing reliability. The pump shaft 4 is driven by the magnetic drive mechanism 8, which is located in the non-submerged area of ​​the reactor 1. The magnetic drive mechanism 8 includes an outer magnetic rotor 81, an isolation sleeve 82, and an inner magnetic rotor 83, which are sequentially mounted. The outer magnetic rotor 81 is directly connected to a drive motor 84, and the inner magnetic rotor 83 is directly connected to the pump shaft 4. The rotation generated when the drive motor 84 drives the outer magnetic rotor 81 to rotate... The rotating magnetic field penetrates the isolation sleeve 82, driving the inner magnetic rotor 83 to rotate synchronously, achieving contactless torque transmission. The isolation sleeve 82 completely seals the medium inside the reactor 1, eliminating the problem of medium leakage at the source. The isolation sleeve 82 is made of zirconium dioxide non-metallic material, which has excellent corrosion resistance, high resistivity, low thermal expansion coefficient and high structural strength. Compared with conventional metal isolation sleeves, zirconium dioxide isolation sleeves do not generate magnetic eddy current losses in alternating magnetic fields, which can effectively improve the operating efficiency of the pump and avoid the medium temperature rise problem caused by magnetic eddy currents, making it suitable for temperature-sensitive catalytic reaction conditions.

[0024] A double-bearing support structure 9 is fitted between the magnetic drive mechanism 8 and the reactor 1, located on the pump shaft 4. The double-bearing support structure 9 is connected to a nitrogen sealing system 10. The bearings of the double-bearing support structure 9 are entirely housed within a nitrogen-sealed cavity outside the reactor 1, unaffected by the temperature of the medium inside the reactor or solid catalyst particles. Connected to the nitrogen sealing system 10, a slightly positive pressure nitrogen atmosphere completely isolates the medium inside the reactor 1 from the bearing cavity, preventing catalyst particles and volatile components in the medium from contaminating the bearing grease and ensuring long-term stable operation of the bearing. The double-bearing support structure 9 includes a shaft... The bearing housing 91 is connected at both ends to the magnetic drive mechanism 8 and the reactor 1, respectively. A cylindrical roller bearing 92 is installed in the bearing housing 91 near the magnetic drive mechanism 8, which can withstand the large radial load generated during pump operation. An angular contact ball bearing 93 is installed in the bearing housing 91 near the reactor 1, and a cylindrical roller bearing 92 is used near the impeller 3, which can withstand bidirectional axial loads and ensure the running stability of the pump shaft 4. The bearings are grease lubricated. The bearing housing 91 is provided with grease filling holes and grease drain holes, which can realize the replenishment of grease without stopping the machine. The grease replenishment cycle is 3 to 4 months, and maintenance is convenient.

[0025] The present invention provides a clog-resistant and wear-resistant submersible pump with uniform spraying function for a reaction vessel 1, which achieves at least the following beneficial effects: 1. Solve the problem of catalyst aggregation and significantly improve catalytic reaction efficiency. This invention employs a submerged structure with the inlet vertically downwards facing the bottom of the reactor, combined with a large-diameter funnel-shaped flow-stabilizing suction structure. This allows for the direct and efficient suction of concentrated catalyst settled at the bottom of the reactor, preventing material accumulation at the bottom from the source. Simultaneously, through a multi-layered uniform spray pipeline, the catalyst is uniformly sprayed into the medium in layers along the axial direction and in full radial coverage along the reactor 1, significantly increasing the contact area between the catalyst and the reaction medium. Actual measurements show that this can improve the catalytic reaction efficiency by more than 30% and significantly reduce catalyst consumption. 2. Excellent anti-clogging and wear-resistant properties significantly extend the equipment's operating cycle. This invention employs a fully open vortex pump hydraulic structure, with over 80% of solid catalyst particles being transported through a bladeless cavity, bypassing the impeller flow channel. This reduces impact wear between particles and the impeller at the source and completely avoids flow channel blockage. Combined with a swept-back, thickened, wear-resistant impeller, a uniformly wide, circular flow channel without sharp angles, a large rounded corner tongue, and a tangential elbow structure, it can minimize wear on flow components. The nozzle uses a high-hardness silicon carbide bushing, and the impeller has sufficient wear-resistant margin, which can extend the continuous operation cycle of the equipment from the conventional 1 month to more than 12 months, significantly reducing maintenance costs. 3. High efficiency and energy saving, suitable for heat-sensitive catalytic reaction conditions. The magnetic drive mechanism of this invention uses a zirconium dioxide non-metallic isolation sleeve, which eliminates the magnetic eddy current loss of conventional metal isolation sleeves. Compared with conventional magnetic pumps of the same specifications, the operating efficiency is improved by 10% to 15%, and the annual power saving effect is significant. At the same time, it avoids the problem of medium temperature rise caused by magnetic eddy current, and the temperature rise is controlled within 1°C, which can perfectly adapt to the temperature-sensitive fine catalytic reaction conditions. 4. Leak-free, with excellent safety and environmental performance. This invention adopts a magnetically driven contactless transmission structure, which completely seals the medium inside the vessel with a zirconium dioxide isolation sleeve, thus eliminating the risk of leakage from the mechanical seal. It can safely transport flammable, explosive, toxic and harmful chemical media, meeting stringent safety and environmental protection requirements. Combined with a micro-positive pressure nitrogen sealing system, it can completely prevent the medium components from contaminating the bearing grease, while preventing the leakage of volatile components of the medium, further improving the safety performance of the equipment. 5. High reliability and easy maintenance The bearing assembly of this invention is entirely housed in a room-temperature nitrogen-sealed cavity outside the reactor, completely unaffected by the temperature of the medium inside the reactor or solid catalyst particles. Combined with the support structure of cylindrical roller bearings and paired angular contact ball bearings, it can withstand large radial and axial loads, exhibiting excellent operational stability. The bearings are grease-lubricated, allowing for grease replenishment without stopping the machine, with a maintenance cycle of up to 3-4 months. Maintenance is convenient and can meet the needs of long-term continuous operation of chemical plants. 6. Integrated design significantly reduces system costs. This invention integrates multiple functions such as "catalyst suction at the bottom of the reactor, solid-liquid two-phase anti-clogging and wear-resistant conveying, medium stirring and mixing, and uniform spraying throughout the reactor to enhance the reaction," replacing the conventional combination system of "stirrer + delivery pump." This significantly simplifies the structure of the supporting equipment for reactor 1 and reduces equipment investment, installation costs, and floor space.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A clog-resistant and wear-resistant submersible pump for a reaction vessel with uniform spraying function, characterized in that: The system includes a submersible pump body immersed in a reactor. The submersible pump body comprises a pump body, an impeller, and a pump shaft. The pump body has a pump body inlet at its front end. The flow channel of the pump body adopts an annular pressure chamber. The impeller is placed on the side of the pressure chamber and mounted on the pump shaft. The pressure chamber of the pump body is located between the front end of the impeller and the front wall of the pump body, forming a bladeless cavity. The pump body has a tangential outlet flow channel at the pressure chamber. The tangential outlet flow channel is connected to an outlet spray pipe arranged along the axial direction of the reactor in the reactor through a straight pipe section and a 90° elbow. The outlet spray pipe is equipped with nozzles.

2. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 1, characterized in that: The impeller is a fully open swirl impeller, the blades of the impeller are swept blades, the working surface of the blades is machined with a radius of R3-R6 at the inlet, the thickness of the blades is 1.5-2 times the theoretical thickness calculated for strength, the inlet installation angle of the blades is 10°-30°, and the inclination angle of the blades is 10°-20°.

3. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 1, characterized in that: The pump body inlet is equipped with an inlet collection section, which adopts an inward-expanding flared mouth structure. The flared mouth expansion angle of the inlet collection section is 60°-75°, the inlet diameter of the flared mouth of the inlet collection section is 3-5 times the nominal diameter of the pump body inlet, and the distance between the flared mouth inlet end of the inlet collection section and the bottom of the reactor is 0.2-0.4 times the diameter of the pump body inlet.

4. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 1, characterized in that: The tongue of the tangential outlet channel is machined with a radius of R8-R16.

5. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 1, characterized in that: The outlet spray pipeline includes a steel pipe with a cap fixed at one end and the other end connected to the tangential outlet flow channel via a flange. A layer of nozzles is arranged along the axial direction at intervals of 0.2-0.4m on the outlet spray pipeline.

6. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 1, characterized in that: The nozzle is at a 90° angle to the outlet spray pipe. The nozzle includes an outer substrate and an inner bushing, which are fitted together and welded into one piece. The outer substrate is connected to the outlet spray pipe through a threaded structure. The flow channel of the inner bushing adopts a conical inward and outward expansion structure.

7. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 1, characterized in that: The pump shaft is driven by a magnetic drive mechanism located in the non-immersion zone of the reactor. The magnetic drive mechanism includes an outer magnetic rotor, an isolation sleeve, and an inner magnetic rotor that are sequentially mounted. The outer magnetic rotor is directly connected to the drive motor, and the inner magnetic rotor is directly connected to the pump shaft. When the drive motor drives the outer magnetic rotor to rotate, the rotating magnetic field generated penetrates the isolation sleeve and drives the inner magnetic rotor to rotate synchronously.

8. The anti-clogging and wear-resistant submersible pump for a reactor with uniform spraying function as described in claim 7, characterized in that: The pump shaft is fitted with a double bearing support structure between the magnetic drive mechanism and the reactor. The double bearing support structure is connected to a nitrogen sealing system. The double bearing support structure includes a bearing housing. The two ends of the bearing housing are respectively connected to the magnetic drive mechanism and the reactor. A cylindrical roller bearing is installed in the bearing housing near the magnetic drive mechanism, and an angular contact ball bearing is installed in the bearing housing near the reactor.

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