Aluminum sulfate reaction kettle

Abstract

The utility model relates to the technical field of chemical reaction equipment, in particular to an aluminum sulfate reaction kettle which comprises a kettle body, a kettle cover detachably connected to the top end of the kettle body and a stirring mechanism used for stirring aluminum sulfate, a self-cleaning assembly used for cleaning the inner wall of the kettle body is arranged on the stirring mechanism, and the self-cleaning assembly is in linkage connection with the stirring mechanism; the stirring mechanism comprises a rotating shaft, a plurality of stirring shafts and a driving motor, the output shaft end of the driving motor is in transmission connection with the end, penetrating through the kettle cover and extending outwards, of the rotating shaft, a mechanical sealing structure is arranged at the joint of the driving motor and the rotating shaft, and the rotating shaft is located on the central axis of the kettle body and is of a hollow structure; the plurality of stirring shafts are arranged on the rotating shaft in an up-down staggered manner. The aluminum sulfate reaction kettle disclosed by the utility model solves the problems that the traditional reaction kettle is easy to corrode, the reaction liquid cannot be discharged and the cleaning efficiency is low, so that the durability, the safety and the cleaning efficiency of the reaction kettle are improved, and the production cost is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical reaction equipment, in particular to an aluminum sulfate reaction kettle. Background Art

[0002] Aluminum sulfate is a white rhombic crystal or powder. In the paper industry, it is used as a precipitant for sizing agents such as rosin size and wax emulsion, as a flocculant in water treatment, and also as an internal agent in foam fire extinguishers; when preparing aluminum sulfate by the sulfuric acid method, bauxite is crushed to a certain particle size, added to a reaction kettle and reacted with sulfuric acid. After the reaction liquid is settled, it becomes a clear liquid, then sulfuric acid is added to the clear liquid to neutralize it to neutral or slightly alkaline, and then it is concentrated to about 115 °C, cooled and solidified, and crushed to obtain the finished product.

[0003] In the production process of aluminum sulfate, its preparation process belongs to an acid-base reaction, and generally a reaction kettle is used as a mixing device. Since the reaction time of aluminum sulfate is short and intense, if the reaction is not properly controlled, phenomena such as incomplete reaction or crystallization are likely to occur. The produced aluminum sulfate crystals and unreacted impurities are likely to settle in the part of the stirring dead angle of the reaction kettle, causing local scaling inside the reaction kettle, and even easily blocking the outlet pipeline of the reaction kettle, resulting in the situation where the reaction liquid cannot be discharged, seriously affecting the quality of the product and the service life of the reaction vessel.

[0004] When cleaning the internal scale of the reaction kettle in the prior art, generally, the kettle cover is manually disassembled to clean the inside of the reaction kettle. This cleaning method not only results in low cleaning efficiency, but also increases production costs and downtime. Summary of the Utility Model

[0005] In order to solve the technical defects proposed in the above background art, the purpose of the utility model is to provide an aluminum sulfate reaction kettle, by combining a stirring mechanism with a self-cleaning component, which can significantly improve its sealing performance and cleaning efficiency while ensuring good anti-corrosion performance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An aluminum sulfate reaction kettle, comprising a kettle body, a kettle cover detachably connected to the top end of the kettle body, and a stirring mechanism for stirring aluminum sulfate, characterized in that a self-cleaning component for cleaning the inner wall of the kettle body is arranged on the stirring mechanism, and the self-cleaning component is linked with the stirring mechanism; the stirring mechanism includes a rotating shaft, a stirring shaft and a driving motor, the output shaft end of the driving motor is in transmission connection with one end of the rotating shaft extending outwards through the kettle cover, and a mechanical seal structure is arranged at the connection of the driving motor and the rotating shaft, the rotating shaft is arranged on the central axis of the kettle body, and the rotating shaft is of a hollow structure, a plurality of stirring shafts are arranged, and the plurality of stirring shafts are arranged in a vertically staggered manner on the rotating shaft;

[0008] The self-cleaning component includes a high-pressure nozzle, a connecting pipe, and a scraping plate. The high-pressure nozzle is arranged at one end of the stirring shaft away from the rotating shaft, and a control valve is arranged at the bottom end of the high-pressure nozzle. The connecting pipe is arranged inside the stirring shaft and the rotating shaft, and one end of the connecting pipe is communicated with the high-pressure nozzle, and the other end extends out of the kettle cover and is externally connected to a water pipe. The scraping plate is inserted into the rotating shaft in a staggered manner, and the scraping plate is arranged along the edge of the inner wall of the kettle body. A scraping brush is arranged at one end of the scraping plate that fits the inside of the kettle body.

[0009] Preferably, the length of the stirring shaft is half of the length of the scraping plate. The stirring shaft is a hollow cylindrical structure, and the scraping plate is a solid plate-like structure.

[0010] Preferably, support frames for fixing and supporting are connected to both sides of the kettle body. A transmission component is connected between the top of the support frame and the kettle body, and a locking part for fixing the transmission component is arranged on the support frame.

[0011] Preferably, the transmission component includes a rotating shaft, a worm gear, and a worm. One end of the rotating shaft is fixed on the outer side wall of the kettle body, and the other end is rotatably connected to the worm gear. The worm gear is in transmission connection with the worm, and one end of the worm is connected to a servo motor, and the other end is connected to a handwheel. The servo motor is fixed on the support frame, and the output end of the servo motor is in transmission connection with the rotating shaft through the worm gear and the worm gear, so that the kettle body swings along the support frame.

[0012] Preferably, the kettle body includes an inner cylinder body and a jacket cylinder body. The top end of the inner cylinder body is welded to the outer side wall of the jacket cylinder body, and an inner cylinder head and a jacket head are respectively arranged at the bottom ends of the inner cylinder body and the jacket cylinder body. Both the inner cylinder head and the jacket head are arranged as inclined bottom arc-shaped structures.

[0013] Specifically, the reaction kettle as a whole adopts a modular design, which is convenient for disassembly and replacement of the inner lining. At the same time, the surface of the kettle body is polished to reduce dirt adhesion and facilitate cleaning.

[0014] Preferably, a water inlet pipe and a water outlet pipe are fixedly installed on the side of the inner cylinder body. Both the water inlet pipe and the water outlet pipe are communicated with the cavity formed between the inner cylinder body and the jacket cylinder body, and the water inlet pipe is located below the water outlet pipe.

[0015] Preferably, a heating pipe for heating aluminum sulfate is further arranged in the cavity, and the heating pipe is arranged around the outer side of the jacket cylinder body.

[0016] Preferably, the kettle cover and the jacket cylinder body are fixedly connected through a sealing flange, and a feed inlet, a liquid inlet, an air inlet, and an exhaust port are circumferentially distributed on the kettle cover.

[0017] In summary, the beneficial effects of the present utility model are:

[0018] By arranging a self-cleaning component inside the kettle body, the utility model makes use of the linkage cooperation between the stirring mechanism and the self-cleaning component, enabling the reaction kettle to quickly self-clean after stirring and fusing aluminum sulfate. Thus, it can effectively scrape and clean the scale adhering to the inner wall of the reaction kettle, solving the problems of easy corrosion, inability to discharge the reaction liquid, and low cleaning efficiency of traditional reaction kettles. Thereby, it improves the durability, safety, and production efficiency of the reaction kettle, reduces the maintenance cost, and also extends the service life of the reaction kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the aluminum sulfate reaction kettle of the utility model;

[0020] Figure 2 is the working state diagram of the aluminum sulfate reaction kettle of the utility model;

[0021] Figure 3 is the cross-sectional view of the aluminum sulfate reaction kettle of the utility model;

[0022] Figure 4 is Figure 3 the enlarged view of the structure at A in

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Kettle body; 11. Inner cylinder body; 12. Jacket cylinder body; 13. Inner cylinder head; 14. Jacket head; 2. Kettle cover; 21. Feed inlet; 22. Liquid inlet; 23. Gas inlet; 24. Exhaust port; 25. Discharge port; 3. Stirring mechanism; 31. Rotating shaft; 32. Stirring shaft; 33. Driving motor; 4. Self-cleaning component; 41. High-pressure spray head; 42. Connecting pipe; 43. Scraping plate; 44. Scraping brush; 45. Control valve; 5. Mechanical seal structure; 6. Support frame; 7. Transmission component; 71. Rotating shaft; 72. Worm gear; 73. Worm; 75. Handwheel; 8. Water inlet pipe; 9. Water outlet pipe; 10. Heating pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art shall fall within the protection scope of the utility model.

[0026] Those skilled in the art should understand that in the disclosure of this utility model, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this utility model.

[0027] In the description of this utility model, if there are words such as "a number of" for description, its meaning is one or more, and the meaning of multiple is two or more. Understanding greater than, less than, exceeding, etc. does not include the base number, and understanding above, below, within, etc. includes the base number. If there is a description of first, second, third, etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0028] The following Figures 1-4 further elaborates on an embodiment of a reaction kettle for aluminum sulfate of this utility model in conjunction with the attached drawings.

[0029] A reaction kettle for aluminum sulfate, as Figures 1 to 3 shown, includes a kettle body 1, a kettle cover 2 detachably connected to the top end of the kettle body 1, and a stirring mechanism 3 for stirring aluminum sulfate. A self-cleaning component 4 for cleaning the inner wall of the kettle body 1 is arranged on the stirring mechanism 3, and the self-cleaning component 4 is linked and connected with the stirring mechanism 3; the stirring mechanism 3 includes a rotating shaft 31, a stirring shaft 32, and a driving motor 33. The output shaft end of the driving motor 33 is in transmission connection with one end of the rotating shaft 31 extending outwards through the kettle cover 2, and a mechanical seal structure 5 is arranged at the connection between the driving motor 33 and the rotating shaft 31. The rotating shaft 31 is arranged on the central axis of the kettle body 1, and the rotating shaft 31 is a hollow structure. A plurality of stirring shafts 32 are provided, and the plurality of stirring shafts 32 are arranged in a vertically staggered manner on the rotating shaft 31.

[0030] Specifically, during the preparation of aluminum sulfate, the bauxite is first crushed into powder and then put into the kettle body 1. At the same time, sulfuric acid is poured into the kettle body 1, and the stirring mechanism 3 is used to stir and mix to form aluminum sulfate. During the operation of the reaction kettle, the stirring mechanism 3 rotates under the action of the driving motor 33. The driving motor 33 is installed on the top of the kettle cover 2, and a mechanical seal structure 5 is provided at the connection between the driving motor 33 and the rotating shaft 31 to prevent the mixed liquid from leaking from this connection during the stirring and mixing process, thereby realizing leak-free operation and further improving the working efficiency of the stirring mechanism 3. In addition, in order to further accelerate the mixing rate, the stirring shafts 32 are arranged in a staggered manner up and down. The purpose of this setting is to make the aluminum sulfate at different height positions in the kettle body 1 mix evenly. In addition, the rotating shaft 31 and the stirring shafts 32 are set as hollow structures, so that the high-pressure nozzles 41 in the self-cleaning component 4 can be connected through the rotating shaft 31 and the stirring shafts 32, which is convenient for cleaning the inner wall of the kettle body 1 in all directions and improving the cleaning efficiency. The mechanical seal structure 5 mainly uses an oil seal, and the principle of the oil seal is prior art and will not be elaborated here.

[0031] In this embodiment, as Figure 4 shown, the self-cleaning component 4 includes a high-pressure nozzle 41, a connecting pipe 42, and a scraping plate 43. The high-pressure nozzle 41 is arranged at one end of the stirring shaft 32 far from the rotating shaft 31, and a control valve 45 is arranged at the bottom end of the high-pressure nozzle 41. The connecting pipe 42 is arranged in the stirring shaft 32 and the rotating shaft 31, and one end of the connecting pipe 42 is communicated with the high-pressure nozzle 41, and the other end extends out of the kettle cover 2 to be connected to an external water source. The scraping plate 43 is inserted into the rotating shaft 31 in a staggered manner, and the scraping plate 43 is arranged along the inner wall of the kettle body 1, and a scraping brush 44 is arranged at one end of the scraping plate 43 that fits the inner part of the kettle body 1.

[0032] Specifically, a high-pressure nozzle 41 is arranged inside the reaction kettle, which can be automatically cleaned during the production gap, can cover the entire inside of the kettle body 1, quickly remove the attachments, reduce the need for manual cleaning, and improve the cleaning efficiency. During the cleaning process of the high-pressure nozzle 41, an external water pipe is connected by the connecting pipe 42 to provide water for it. The connecting pipe 42 is hidden in the stirring shaft 32 and the rotating shaft 31, so as to avoid affecting the operation of the stirring mechanism 3. At the same time, a control valve 45 is arranged between the high-pressure nozzle 41 and the stirring shaft 32 to control the spraying water pressure. When the control valve 45 is installed on the stirring shaft 32, it is assembled with an actuator operated manually or remotely. The actuator controls the movement of the valve rod, changes the position of the valve flap or plug in the valve body, adjusts the water flow pressure or flow rate passing through the connecting pipe 42, thereby changing the fluid pressure downstream of the control valve 4, and finally adjusting the water flow rate. The manually operated actuator has the advantage of low cost, while the remotely operated actuator can conveniently open the water flow automatically when the kettle body 1 needs self-cleaning and close the water flow automatically after the cleaning is completed.

[0033] After the reaction kettle is finished and the aluminum sulfate is mixed, the kettle body 1 starts to automatically perform the self-cleaning function. The opening and closing size of the control valve 45 is adjusted according to the capacity of the aluminum sulfate mixture. When the aluminum sulfate mixture capacity in the kettle body 1 is large or there are many residues sticking to the inner wall of the kettle body 1, the control valve 45 is opened to the maximum water output, and the kettle body 1 is flushed with high-pressure water flow to make the residues sticking to the inner wall of the kettle body 1 fall off, thereby improving the cleaning effect; at the same time, the sprayed water flow can also clean the stirring shaft 32 when it falls, so as to avoid the residual aluminum sulfate from corroding the stirring shaft 32 and reducing its service life. After completing the first cleaning, the remote operation control valve 45 is used to reduce the water flow, and the first cleaning operation is repeated, thereby saving water resources and reducing production costs. After the self-cleaning is completed, the control valve 45 is closed, and the kettle body 1 begins to repeat the stirring work.

[0034] In this embodiment, the length of the stirring shaft 32 is half of the length of the scraper plate 43 , the stirring shaft 32 is a hollow cylindrical structure, and the scraper plate 43 is a solid plate structure.

[0035] Specifically, since the connecting pipe 42 is arranged inside the stirring shaft 32, the stirring shaft 32 is set to a hollow cylindrical structure. At the same time, in order not to affect the operation of the self-cleaning component 4, the length of the stirring shaft 32 is set to half the length of the scraper plate 43, so that when stirring and mixing, the rotation speed of the rotating shaft 31 can be faster, which speeds up the mixing efficiency; the scraper plate 43 is set to a solid plate structure in order to better clean the firm scale attached to the inner wall of the kettle body 1; at the same time, a scraper brush 44 is arranged on the side of the scraper plate 43 along the circumferential direction, and the scraper brush 44 is arranged against the inner wall of the kettle body 1. The hair strips of the scraper brush 44 are made of hard steel material. When the water jet is used for cleaning, the scraper brush 44 can be used to scrape off the residues stubbornly attached to the inner wall of the kettle body 1, further improving the cleaning effect of the kettle body 1.

[0036] In this embodiment, support frames 6 for support are connected to both sides of the kettle body 1, a transmission assembly 7 is connected between the top of the support frame 6 and the kettle body 1, and a locking piece for installing the transmission assembly 7 is provided on the support frame 6; wherein, the transmission assembly 7 includes a rotating shaft 71, a worm gear 72 and a worm 73, one end of the rotating shaft 71 is fixed to the outer wall of the kettle body 1, and the other end is rotationally connected to the worm gear 72, the worm gear 72 is transmission-connected to the worm 73, and one end of the worm 73 is connected to a servo motor, and the other end is connected to a handwheel 75; the servo motor is fixed on the support frame 6, and the output end of the servo motor is transmission-connected to the rotating shaft 71 through the worm gear 72 and the worm 73, so that the kettle body 1 swings around the rotating shaft 71.

[0037] Specifically, the support frame 6 can stably support the reactor, suspending it on the support frame 6, so that it can swing according to production requirements, accelerating the generation of the reaction and improving production efficiency. When the kettle body 1 is installed on the support frame 6, it is erected on the top of the support frame 6 through the rotating shafts 71 connected to both sides of the inner cylinder body 11. The rotating shafts 71 are connected to the inner cylinder body 11 through locking members, and the locking members are composed of a tight hoop and screws. The rotating shafts 71 pass through the tight hoop for locking, which can prevent the reactor from shifting during the swinging process. And during the transmission process, the reactor can swing back and forth under the action of the transmission assembly 7. Among them, the speed and amplitude of the swing are controlled by the servo motor, and the servo motor controls the reciprocating swing of the reactor through forward and reverse rotation, which can accelerate its mixing speed.

[0038] In this embodiment, the kettle body 1 includes an inner cylinder body 11 and a jacket cylinder body 12. The top end of the inner cylinder body 11 is welded to the outer side wall of the jacket cylinder body 12, and an inner cylinder head 13 and a jacket head 14 are respectively arranged at the bottom ends of the inner cylinder body 11 and the jacket cylinder body 12. Both the inner cylinder head 13 and the jacket head 14 are arranged in an inclined bottom arc structure.

[0039] Specifically, the inside of the jacket cylinder body 12 uses a corrosion-resistant alloy material as the inner lining, such as Hastelloy or titanium alloy, and a special anti-corrosion coating is applied on the surface to form a double protection, effectively resisting the erosion of strong corrosive media such as sulfuric acid. At the same time, the inner cylinder body 11 can also effectively isolate the heat transfer of the jacket cylinder body 12, avoiding damage caused by accidental human contact with the jacket cylinder body 12. In addition, in order to further improve the discharging speed and avoid the sticking of aluminum sulfate to the bottom, the inner cylinder head 13 and the jacket head 14 at the bottom ends of the inner cylinder body 11 and the jacket cylinder body 12 are both arranged in an inclined bottom arc structure. The purpose of this setting is to accelerate the discharging speed and avoid the residue of aluminum sulfate solution.

[0040] In order to further improve the reaction speed of aluminum sulfate, a water inlet pipe 8 and a water outlet pipe 9 are fixedly installed on the side of the inner cylinder body 11. Both the water inlet pipe 8 and the water outlet pipe 9 are communicated with the cavity formed between the inner cylinder body 11 and the jacket cylinder body 12, and the water inlet pipe 8 is located below the water outlet pipe 9. A heating pipe 10 for heating aluminum sulfate is also arranged in the cavity, and the heating pipe 10 is arranged around the outside of the jacket cylinder body 12.

[0041] Specifically, when aluminum hydroxide reacts with sulfuric acid, heating with the heating pipe 10 can accelerate the reaction rate and improve the mixing effect at the same time. Cold water is injected into the cavity between the inner cylinder body 11 and the jacket cylinder body 12 through the water inlet pipe 8. Meanwhile, the heating pipe 10 starts to heat the cold water, enabling the aluminum sulfate solution in the kettle body 1 to be quickly stirred and fused. After the heating is completed, the water can be discharged from the water outlet pipe 9. When the mixed aluminum sulfate needs to be cooled and crystallized, cold water or coolant is also injected into the cavity through the water inlet pipe 8, and the heating pipe 10 is turned off, so that the aluminum sulfate solution in the kettle body 1 can be quickly cooled, accelerating its crystallization rate. Under the stirring action of the stirring mechanism 3, the crystallization rate of aluminum sulfate is further accelerated, and the crystal grain size is reduced at the same time. Finally, the generated aluminum sulfate can be discharged from the discharge port 25 at the bottom.

[0042] In this embodiment, the kettle cover 2 and the jacket cylinder body 12 are fixedly connected through a sealing flange. The feeding port 21, the liquid inlet 22, the air inlet 23 and the exhaust port 24 are circumferentially distributed on the kettle cover 2.

[0043] Specifically, to improve the sealing effect between the kettle cover 2 and the kettle body 1, it is fixedly connected by setting a sealing flange. Among them, a sealing ring is provided on the sealing flange. The sealing ring is made of a special material with high temperature resistance and corrosion resistance, such as polytetrafluoroethylene (PTFE) composite material, to ensure a long-term stable working state. And a plurality of locking bolts are circumferentially distributed on the edge of the sealing flange. In this way, during the reaction, the sealing flange can be covered on the top opening of the jacket cylinder body 12, improving the sealing effect at the connection and preventing external air from entering the kettle body 1 to react with aluminum sulfate. At the same time, to facilitate loading and unloading, the feeding port 21 and the liquid inlet 22 are provided on the kettle cover 2, enabling aluminum hydroxide powder and sulfuric acid to be automatically added into the kettle body 1 for reaction. The air inlet 23 and the exhaust port 24 are also provided, allowing filling gas according to production requirements during the reaction or discharging the generated gas.

[0044] The working principle of the present utility model:

[0045] First, inject raw materials into the kettle body 1 through the feed inlet 21. Connect the water inlet pipe 8 to the water supply system, and inject water between the inner cylinder body 11 and the jacket cylinder body 12. Turn on the heating pipe 10 to heat the water, and then transfer the heat to the kettle body 1 to heat the raw materials. Turn on the drive motor 33 to drive the stirring shaft 32 to rotate through the rotating shaft 31 to mix the raw materials. At the same time, turn on the servo motor to drive the transmission component 7 to rotate, and the transmission component 7 drives the kettle body 1 to swing intermittently to improve the reaction rate of aluminum sulfate in the kettle body 1. Until the stirring is completed, the mixed aluminum sulfate flows out from the discharge port 25 at the bottom of the kettle body 1 until it is completely discharged. After that, the stirring mechanism 3 continues to work. The self-cleaning component 4 located on the stirring mechanism 3 will control the high-pressure nozzle 41 to spray water flow. At the same time, the scraping plate 43 will scrape and clean the scale attached to the inner wall of the kettle body 1 through the scraping brush 44. The cleaned sewage also flows out from the discharge port 25; thus improving the convenience of cleaning the reaction kettle.

[0046] In the utility model, by arranging the self-cleaning component 4 in the kettle body 1 and utilizing the linkage cooperation between the stirring mechanism 3 and the self-cleaning component 4, the reaction kettle can be quickly self-cleaned after stirring and fusing aluminum sulfate, so as to effectively scrape and clean the scale attached to the inner wall of the reaction kettle, solve the problems of easy corrosion of the traditional reaction kettle, inability to discharge the reaction liquid, and low cleaning efficiency, thereby improving the durability, safety and production efficiency of the reaction kettle, reducing the maintenance cost, and also increasing the service life of the reaction kettle.

[0047] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same parts are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. An aluminum sulfate reactor, comprising a reactor body, a reactor cover detachably connected to the top end of the reactor body, and a stirring mechanism for stirring aluminum sulfate, characterized in that, A self-cleaning component for cleaning the inner wall of the kettle body is arranged on the stirring mechanism, and the self-cleaning component is linked and connected with the stirring mechanism; the stirring mechanism includes a rotating shaft, a stirring shaft and a driving motor. The output shaft end of the driving motor is in transmission connection with one end of the rotating shaft extending outwards through the kettle cover, and a mechanical seal structure is arranged at the connection between the driving motor and the rotating shaft. The rotating shaft is arranged on the central axis of the kettle body, and the rotating shaft is of a hollow structure. A plurality of stirring shafts are arranged, and the plurality of stirring shafts are arranged in a vertically staggered manner on the rotating shaft; The self-cleaning component includes a high-pressure nozzle, a connecting pipe and a scraping plate. The high-pressure nozzle is arranged at one end of the stirring shaft far away from the rotating shaft, and a control valve is arranged at the bottom end of the high-pressure nozzle. The connecting pipe is arranged in the stirring shaft and the rotating shaft, and one end of the connecting pipe is communicated with the high-pressure nozzle, and the other end extends out of the kettle cover and is externally connected to a water pipe; the scraping plate is inserted on the rotating shaft in a staggered manner, and the scraping plate is arranged along the edge of the inner wall of the kettle body. A scraping brush is arranged at one end of the scraping plate in contact with the inside of the kettle body.

2. The aluminum sulfate reactor according to claim 1, characterized in that, The length of the stirring shaft is half of the length of the scraping plate. The stirring shaft is of a hollow cylindrical structure, and the scraping plate is of a solid plate structure.

3. The aluminum sulfate reactor according to claim 2, characterized in that, Support frames for fixing and supporting are connected to both sides of the kettle body. A transmission component is connected between the top of the support frame and the kettle body, and a locking member for fixing the transmission component is arranged on the support frame.

4. The aluminum sulfate reactor according to claim 3, characterized in that, The transmission component includes a rotating shaft, a worm gear and a worm. One end of the rotating shaft is fixed on the outer side wall of the kettle body, and the other end is rotatably connected with the worm gear. The worm gear is in transmission connection with the worm, and one end of the worm is connected with a servo motor and the other end is connected with a hand wheel; the servo motor is fixed on the support frame, and the output end of the servo motor is in transmission connection with the rotating shaft through the worm gear and the worm gear, so that the kettle body swings along the support frame.

5. The aluminum sulfate reactor according to claim 4, wherein The kettle body includes an inner cylinder body and a jacket cylinder body. The top end of the inner cylinder body is welded on the outer side wall of the jacket cylinder body, and an inner cylinder head and a jacket head are respectively arranged at the bottom ends of the inner cylinder body and the jacket cylinder body. Both the inner cylinder head and the jacket head are arranged in an inclined bottom arc structure.

6. The aluminum sulfate reactor according to claim 5, characterized in that, A water inlet pipe and a water outlet pipe are fixedly installed on the side of the inner cylinder body. Both the water inlet pipe and the water outlet pipe are communicated with the cavity formed between the inner cylinder body and the jacket cylinder body, and the water inlet pipe is located below the water outlet pipe.

7. The aluminum sulfate reactor according to claim 6, wherein A heating pipe for heating aluminum sulfate is further arranged in the cavity, and the heating pipe is arranged around the outer side of the jacket cylinder body.

8. The aluminum sulfate reactor according to claim 7, characterized in that, The kettle cover and the jacket cylinder body are fixedly connected through a sealing flange plate, and a feed inlet, a liquid inlet, a gas inlet and an exhaust port are circumferentially distributed on the kettle cover.

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