Reaction kettle

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle. The reaction kettle comprises a kettle body, a stirring device and a cleaning device, the stirring device comprises a stirring shaft and a stirring paddle, the stirring shaft is rotatably mounted on the kettle body along the axis in the vertical direction, the lower end of the stirring shaft extends into a kettle cavity of the kettle body, and the stirring paddle is mounted at the lower end of the stirring shaft; the cleaning device comprises a mounting shaft and a brush, the mounting shaft is rotationally mounted on the kettle body along the axis in the vertical direction, the mounting shaft and the stirring shaft are arranged at an interval, the brush is movably mounted on the mounting shaft in the vertical direction, the brush is in a cleaning state when moving downwards to be flush with the stirring paddle, and the brush is in an avoiding state when moving upwards to be located on the ore pulp liquid level; and in the cleaning state, the brush abuts against the stirring paddle, and the mounting shaft drives the brush to rotate. The blades of the stirring paddle are cleaned through the rotating brush, descaling of the blades of the stirring paddle is achieved, and it is avoided that scaling on the blades of the stirring paddle influences work of the stirring paddle.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a reaction vessel. Background Technology

[0002] Currently, in the hydrometallurgical process for laterite nickel ore, slurry, sulfuric acid, and steam are typically injected into a reactor for leaching nickel and cobalt from the ore. However, during reactor operation, the iron and aluminum ions in the laterite nickel ore hydrolyze, forming scale that accumulates on the reactor walls and the agitator blades inside the reactor. When the scale buildup is significant, timely cleaning is necessary to prevent it from affecting the reactor's operation.

[0003] The prior art provides a reaction vessel with descaling function, including a vessel body, an outer shell fixedly connected to the outer wall of the vessel body, a shock-absorbing spring fixedly connected to the inner wall of the outer shell, a support column fixedly connected to the bottom of the outer shell, a base plate fixedly connected to one end of the support column, a support plate fixedly connected to the outer wall of the support column, a first housing fixedly connected to the top of the support plate, a first motor fixedly connected to the inner bottom wall of the first housing, and a descaling brush fixedly connected to the output shaft of the first motor via a coupling.

[0004] While the aforementioned existing technology can descale the sidewalls of the reactor vessel, it cannot descale the blades of the agitator. When there is a lot of scale buildup on the blades of the agitator, on the one hand, the different scale buildup on each blade results in different weight increases for each blade, causing the agitator to lose its balance and affecting normal operation; on the other hand, the increased weight of the agitator increases the load and affects its service life.

[0005] Therefore, there is an urgent need for a reaction vessel to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a reaction vessel to solve the technical problem that, although the existing technology can descale the side wall of the reaction vessel, it cannot descale the impeller blades. When there is a lot of scale on the impeller blades, on the one hand, the scale on each blade is different, resulting in different weight increases for each blade, which makes it impossible for the impeller to maintain balance and affects normal operation. On the other hand, the increased weight of the impeller increases the load and affects its service life.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] The reaction vessel includes:

[0009] The vessel body;

[0010] A stirring device includes a stirring shaft and a stirring paddle. The stirring shaft is rotatably mounted on the vessel body along a vertical axis, with its lower end extending into the vessel cavity. The stirring paddle is mounted on the lower end of the stirring shaft.

[0011] A cleaning device includes a mounting shaft and a brush. The mounting shaft is rotatably mounted on the vessel body along a vertical axis and spaced apart from the stirring shaft. The brush is movably mounted on the mounting shaft in a vertical direction to switch between a cleaning state and an avoidance state. The brush can abut against the stirring paddle, and the mounting shaft drives the brush to rotate.

[0012] As an optional solution, the cleaning device further includes a first driving component and a second driving component. The first driving component is disposed on the mounting shaft and connected to the brush to drive the brush to move in the vertical direction. The second driving component is connected to the mounting shaft to drive the mounting shaft to rotate.

[0013] As an optional solution, the brush is provided with a plurality of mounting holes spaced apart along the middle of the brush;

[0014] The mounting shaft is hollow and has multiple grooves around its circumference. The grooves penetrate the inner and outer walls of the mounting shaft, and a mounting wall is formed between two adjacent grooves. The mounting wall is adapted to the mounting hole, and the brush is slidably mounted on the mounting wall.

[0015] As an optional solution, the brush is provided with a threaded hole in the middle;

[0016] The first drive assembly includes a lead screw and a first drive motor. The lead screw is rotatably mounted in the mounting shaft along an axis in the vertical direction, and the lead screw is threadedly engaged with the brush. The first drive motor is mounted on the upper end of the mounting shaft, and the main shaft of the first drive motor is connected to the lead screw.

[0017] As an optional embodiment, the second drive assembly includes a driving bevel gear, a driven bevel gear, and a second drive motor. The driving bevel gear is rotatably mounted on the vessel body along a horizontal axis, and the driven bevel gear is mounted on the mounting shaft. The driving bevel gear and the driven bevel gear mesh, and the main shaft of the second drive motor is connected to the driving bevel gear.

[0018] As an optional solution, the stirring shaft is provided with a first flow channel extending in a vertical direction, and the lower end of the first flow channel is provided with a spray hole facing the stirring paddle, so as to spray scale inhibitor onto the stirring paddle through the first flow channel.

[0019] As an optional solution, the cleaning device further includes a liquid storage tank and a valve assembly. The liquid storage tank contains a scale inhibitor, and the liquid storage tank is connected to the upper end of the first flow channel through the valve assembly. The valve assembly is used to open or close the connection between the liquid storage tank and the first flow channel.

[0020] Alternatively, the impeller may include multiple blades, which are spaced apart circumferentially along the stirring shaft.

[0021] As an optional solution, the cleaning device further includes a spray pipe, which is installed on the stirring shaft and located on opposite sides of the blades. The spray pipe is connected to the first flow channel and is provided with a plurality of spray holes spaced apart along its axial direction, with the spray holes facing one side of the blades.

[0022] As an optional solution, the vessel cavity is provided with a plurality of baffles spaced apart along the slurry flow channel, the plurality of baffles dividing the vessel cavity into a plurality of compartments connected on the upper side, and each compartment is provided with the stirring device and the cleaning device.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] The reactor provided by this utility model features a brush mounted vertically on a mounting shaft. In the cleaning state, the brush moves downwards to be flush with the agitator, and in the avoidance state, it moves upwards to be above the slurry surface. In the cleaning state, the brush is in contact with the agitator, and the mounting shaft rotates the brush. During normal operation, the brush moves vertically upwards to the top of the reactor cavity, above the slurry surface, to avoid affecting the reaction inside the reactor. When scale buildup inside the reactor reaches a certain level, requiring shutdown for descaling, the brush moves downwards to be flush with the agitator blades, in contact with the blades. The mounting shaft rotates the brush, and the agitator shaft rotates the agitator. The rotating brush cleans the agitator blades, thus descaling them and preventing excessive scale buildup that could affect the agitator's operation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the reaction vessel provided in an embodiment of the present utility model;

[0027] Figure 2 A partial structural schematic diagram of the stirring device and cleaning device provided in an embodiment of this utility model;

[0028] Figure 3 A schematic diagram of the blades and spray pipe provided in an embodiment of this utility model;

[0029] Figure 4 A cross-sectional view of the reaction vessel provided in an embodiment of this utility model;

[0030] Figure 5 A partial cross-sectional view of the cleaning device provided in an embodiment of this utility model;

[0031] Figure 6 A partial sectional view of the mounting shaft and brush provided in an embodiment of this utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the mounting shaft provided in an embodiment of the present utility model;

[0033] Figure 8 This is a schematic diagram of the structure of the mounting block provided in an embodiment of the present utility model.

[0034] Figure label:

[0035] 1. Kettle body;

[0036] 2. Stirring device; 21. Stirring shaft; 22. Stirring paddle; 221. Blade; 23. First bevel gear; 24. Second bevel gear; 25. Stirring motor; 26. Spray pipe;

[0037] 3. Cleaning device; 31. Mounting shaft; 311. Groove; 312. Mounting wall; 32. Brush; 321. Mounting block; 3211. Mounting hole; 3212. Threaded hole; 322. Brush bristles; 33. First drive assembly; 331. Lead screw; 332. First drive motor; 34. Second drive assembly; 341. Driving bevel gear; 342. Driven bevel gear; 343. Second drive motor; 35. Liquid storage tank; 36. Air source device; 37. Valve assembly;

[0038] 4. Partition. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] like Figure 1 As shown, this embodiment provides a reaction vessel, which is a reaction container used to complete processes such as sulfidation, nitration, hydrogenation, hydrocarbonation, polymerization, and condensation. The reaction vessel includes a vessel body 1, which is used to contain reactants and carry out chemical reactions.

[0046] To ensure the reactants are mixed evenly and to accelerate the reaction rate, such as... Figure 1 and Figure 2 As shown, the reactor also includes a stirring device 2, which includes a stirring motor 25, a stirring shaft 21, and a stirring paddle 22. The stirring shaft 21 is rotatably mounted on the reactor body 1 along a vertical axis, and the lower end of the stirring shaft 21 extends into the reactor cavity of the reactor body 1. The stirring paddle 22 is mounted on the lower end of the stirring shaft 21, and the upper end of the stirring shaft 21 is connected to the main shaft of the stirring motor 25. The stirring motor 25 can drive the stirring shaft 21 to rotate, thereby driving the stirring paddle 22 to rotate, so as to make the reactants mix evenly.

[0047] It is understandable that a bearing and a sealing device are provided at the position where the upper end of the stirring shaft 21 passes through the vessel body 1 to ensure the sealing of the vessel body 1. The bearing and sealing device are existing technologies and will not be described in detail here.

[0048] like Figure 3 As shown, the stirring paddle 22 includes multiple blades 221, which are spaced apart circumferentially along the stirring shaft 21 to improve the stirring effect.

[0049] Specifically, one end of each blade 221 is fixedly installed on the stirring shaft 21, and each blade 221 is inclined to the horizontal direction. A connecting shaft is provided on one side of the blade 221, and the connecting shaft is fixedly connected to the stirring shaft 21. The connecting shaft is gradually inclined upward in the direction away from the stirring shaft 21, so that the blade 221 is inclined to the horizontal direction, and the blade 221 itself is also inclined to the horizontal direction. This arrangement allows the stirring paddle 22 to carry the material to float when it rotates, which can improve the mixing efficiency and promote the reaction process.

[0050] In this embodiment, since the vessel body 1 is a columnar structure extending in the horizontal direction, in order to avoid interference with the vessel body 1, the width of the blade 221 gradually decreases in the direction away from the stirring shaft 21, and the blade 221 is arranged in an arc shape, which is beneficial for stirring.

[0051] After use, scale easily forms on the inner wall of the reactor body 1. For example, in the hydrometallurgical process for laterite nickel ore, ore slurry, sulfuric acid, and steam are typically injected into the reactor for smelting to extract nickel and cobalt from the laterite nickel ore. After operation, scale, mainly composed of iron and aluminum hydrolysis, forms on the inner wall of the reactor body 1 and on the blades 221 of the agitator 22. This scale buildup occurs on the side walls of the reactor body 1 and on the blades 221 of the agitator 22 inside the reactor. When the scale buildup is significant, it needs to be cleaned promptly to avoid affecting the operation of the equipment.

[0052] In the existing technology, only the inner wall of the vessel 1 can be descaled, but the blades 221 of the agitator 22 cannot be descaled. This results in a lot of scale buildup on the blades 221 of the agitator 22. On the one hand, the scale buildup on each blade 221 is different, which causes the weight of each blade 221 to increase differently, making it impossible for the agitator 22 to maintain balance and affecting normal operation. On the other hand, the increased weight of the agitator 22 increases the load and affects its service life.

[0053] To solve the above problems, such as Figure 1 and Figure 4 As shown, the reactor provided in this embodiment also includes a cleaning device 3. The cleaning device 3 includes a mounting shaft 31 and a brush 32. The mounting shaft 31 is rotatably mounted on the reactor body 1 along the vertical axis and is spaced apart from the stirring shaft 21. The brush 32 is movably mounted on the mounting shaft 31 in the vertical direction to switch between a cleaning state and a clearance state. When the brush 32 moves downward to be flush with the stirring paddle 22, it is in the cleaning state. When the brush 32 moves upward to be on the surface of the slurry, it is in the clearance state. In the cleaning state, the brush 32 abuts against the stirring paddle 22, and the mounting shaft 31 drives the brush 32 to rotate.

[0054] It is understandable that the connection between the mounting shaft 31 and the vessel body 1 is also equipped with bearings and sealing devices.

[0055] By vertically mounting the brush 32 to the mounting shaft 31, the brush 32 moves downwards to be flush with the agitator 22 in the cleaning state, and moves upwards to be above the slurry surface in the avoidance state. In the cleaning state, the brush 32 abuts against the agitator 22, and the mounting shaft 31 drives the brush 32 to rotate. When the reactor is in normal use, the brush 32 moves vertically upwards to the top of the reactor cavity, at which point the brush 32 is above the slurry surface to avoid the brush 32 affecting the interior of the reactor. When the scale inside the reactor reaches a certain level and the reactor needs to be shut down for descaling, the brush 32 moves downwards until it is flush with the agitator 22. At this time, the brush 32 comes into contact with the blades 221 of the agitator 22. The mounting shaft 31 drives the brush 32 to rotate, and the agitator shaft 21 drives the agitator 22 to rotate. The rotating brush 32 cleans the blades 221 of the agitator 22, thereby descaling the blades 221 of the agitator 22 and preventing excessive scale buildup on the blades 221 of the agitator 22, which would affect the operation of the agitator 22.

[0056] In this embodiment, the distance between the mounting shaft 31 and the stirring shaft 21 is greater than the radius of the stirring paddle 22 and less than the radius of the brush 32. This arrangement can prevent the mounting shaft 31 from interfering with the rotation of the stirring paddle 22, and also allows the brush 32 to contact the entire blade 221, ensuring that the brush 32 can clean the entire blade 221.

[0057] Understandably, during cleaning, the stirring shaft 21 can rotate in both directions in conjunction with the brush 32, thereby driving the stirring paddle 22 to rotate in both directions. The speed of the stirring shaft 21 is adjustable to ensure that both sides of the blade 221 can contact the brush 32.

[0058] like Figures 4-6 As shown, the brush 32 includes a mounting block 321 and bristles 322 with cloth disposed around the mounting block 321. The mounting block 321 is made of a hard material, and the bristles 322 are made of a flexible material. The mounting block 321 is movably mounted on the mounting shaft 31 in the vertical direction. The bristles 322 are used to contact the blades 221 of the stirring paddle 22 to clean the blades 221.

[0059] Optionally, the cleaning device 3 further includes a first drive assembly 33, which is disposed on the mounting shaft 31 and connected to the brush 32 to drive the brush 32 to move in the vertical direction.

[0060] Specifically, such as Figures 4-8As shown, a threaded hole 3212 is provided in the middle of the mounting block 321. The diameter of the threaded hole 3212 is smaller than the diameter of the hollow part of the mounting shaft 31, so that the threaded hole 3212 is located inside the mounting shaft 31. The first drive assembly 33 includes a lead screw 331 and a first drive motor 332. The lead screw 331 is rotatably mounted inside the mounting shaft 31 along an axis in the vertical direction. The lower end of the lead screw 331 is flush with the mounting shaft 31, and the upper end of the lead screw 331 protrudes from the mounting shaft 31. The upper and lower ends of the lead screw 331 are connected to the mounting shaft 31 by bearings. The shaft is rotatably connected, and a sealing device is provided between the upper end of the mounting shaft 31 and the lead screw 331. A mounting plate is provided at the upper end of the mounting shaft 31. The first drive motor 332 is mounted on the mounting plate, and the main shaft of the first drive motor 332 faces downward and is coaxial with the lead screw 331. The main shaft of the first drive motor 332 is fixedly connected to the upper end of the lead screw 331 through a coupling. When the first drive motor 332 drives the lead screw 331 to rotate, it can drive the brush 32 to slide in the vertical direction, so that the brush 32 can switch between cleaning state and avoidance state.

[0061] Optionally, the cleaning device 3 further includes a second drive assembly 34, the output end of which is connected to the mounting shaft 31 to drive the mounting shaft 31 to rotate, thereby driving the brush 32 to rotate.

[0062] like Figure 4 and Figure 5 As shown, since the upper end of the mounting shaft 31 is provided with the first drive motor 332, in order to avoid interference between the second drive assembly 34 and the first drive motor 332, the second drive assembly 34 includes a driving bevel gear 341, a driven bevel gear 342, and a second drive motor 343. The part of the mounting shaft 31 located inside the vessel body 1 is the first mounting section, and the part of the mounting shaft 31 located outside the vessel cavity is the second mounting section. The driven bevel gear 342 is fixedly installed on the outer periphery of the second mounting section, and the second drive motor 343 is fixedly installed on the outer side of the vessel body 1. The main shaft of the second drive motor 343 extends horizontally, and the main shaft of the second drive motor 343 is fixedly connected to the driving bevel gear 341. The transmission direction can be changed through the cooperation of the driving bevel gear 341 and the driven bevel gear 342 to avoid interference between the second drive motor 343 and the first drive motor 332.

[0063] In this embodiment, the brush 32 can move vertically relative to the mounting shaft 31 and rotate synchronously with the mounting shaft 31. Therefore, circumferential limiting is required between the brush 32 and the mounting shaft 31. Specifically, as follows... Figures 6-8As shown, the mounting block 321 is provided with multiple mounting holes 3211, which are spaced apart along the middle of the mounting block 321. The mounting holes 3211 extend vertically and are arc-shaped. The mounting shaft 31 has a hollow tubular structure. The circumference of the first mounting section of the mounting shaft 31 is provided with multiple grooves 3111. The grooves 3111 penetrate the inner and outer walls of the first mounting section, so that the tube wall between two adjacent grooves 3111 forms a mounting wall 312. The mounting wall 312 is adapted to the size of the mounting hole 3211. The multiple mounting walls 312 correspond one-to-one with the multiple mounting holes 3211. The mounting wall 312 is located inside the mounting hole 3211, so that the mounting block 321 can slide vertically. The limiting fit between the mounting hole 3211 and the mounting wall 312 can restrict the mutual rotation between the mounting block 321 and the mounting shaft 31.

[0064] During normal operation of the reactor, in order to slow down the scaling rate on the surface of the agitator 22, a scale inhibitor can be sprayed into the reactor body 1. In order to accurately spray the scale inhibitor onto the agitator 22, a first flow channel is opened in the middle of the agitator shaft 21. The first flow channel extends upward through the upper end face of the agitator shaft 21 and connects to the storage tank 35 containing the scale inhibitor. A spray hole connected to the first flow channel is provided on the agitator shaft 21 near the agitator 22. The spray hole is set towards the agitator 22, so that the scale inhibitor can be sprayed onto the agitator 22 through the first flow channel and the spray hole. Combined with the brush 32, the cleaning efficiency of the agitator 22 is improved.

[0065] Specifically, such as Figure 3 As shown, the cleaning device 3 also includes a spray pipe 26, which is installed on the stirring shaft 21 and located on opposite sides of the blade 221. The spray pipe 26 is connected to the first flow channel, and the spray pipe 26 is provided with the above-mentioned spray holes, which are arranged facing the side of the blade 221. This arrangement can spray scale inhibitor on both sides of the blade 221 to enhance the cleaning effect.

[0066] Optionally, the number of spray holes is multiple, and the multiple spray holes are spaced apart along the axial direction of the spray pipe 26 to further enhance the cleaning effect.

[0067] The stirring device 2 also includes a first bevel gear 23 and a second bevel gear 24. The first bevel gear 23 is rotatably mounted on the vessel body 1 along the horizontal axis, and the second bevel gear 24 is mounted on the stirring shaft 21. The first bevel gear 23 and the second bevel gear 24 mesh. The main shaft of the stirring motor 25 is connected to the first bevel gear 23. By meshing the first bevel gear 23 and the second bevel gear 24, the transmission direction can be changed to avoid interference between the stirring motor 25 and the pipeline connected to the first flow channel.

[0068] The cleaning device 3 also includes a storage tank 35 and a valve assembly 37. The storage tank 35 contains a scale inhibitor and is connected to the upper end of the first flow channel via the valve assembly 37. In the cleaning state, the storage tank 35 is disconnected from the first flow channel, and in the avoidance state, the storage tank 35 is connected to the first flow channel. When the vessel 1 is working normally, a scale inhibitor can be injected into the vessel 1 to slow down the scaling rate on the surface of the stirring paddle 22. When the vessel 1 is shut down for descaling, descaling is performed by the brush 32 and a high-pressure water gun, without the need to spray the scale inhibitor. Therefore, the valve assembly 37 is provided to control the connection and disconnection between the storage tank 35 and the first flow channel. That is, when the vessel 1 is working normally and the brush 32 is in the avoidance state, the storage tank 35 is connected to the first flow channel, and the scale inhibitor can be continuously injected into the vessel 1. When the vessel 1 is shut down for descaling, the storage tank 35 is disconnected from the first flow channel.

[0069] Optionally, the cleaning device also includes an air source device 36. The liquid storage tank 35 and the air source device 36 are connected to the upper end of the first flow channel through a valve assembly 37. The valve assembly 37 is used to connect the liquid storage tank 35 or the air source device 36 to the first flow channel. In the avoidance state, the air source device 36 and the liquid storage tank 35 are alternately connected to the first flow channel.

[0070] Specifically, the vessel body 1 is a closed, high-pressure environment, requiring the first flow channel to be sealed. During scale inhibition, scale inhibitor is supplied from the first flow channel into the vessel cavity via the storage tank 35. To allow the gas source device 36 and the storage tank 35 to alternately connect to the first flow channel, a first pipe is connected to the upper end of the first flow channel. The storage tank 35 is connected to the first pipe via a second pipe, and the gas source device 36 is connected to the first pipe via a third pipe. A valve assembly 37 is located on the first pipe or on both the second and third pipes, allowing control of the first pipe. The first flow channel is connected to one of the second and third pipes. When it is not necessary to spray the scale inhibitor, the valve assembly 37 controls the connection between the first and third pipes. At this time, the air source device 36 supplies air into the first flow channel to ensure that the pressure in the first flow channel is the same as the pressure in the vessel cavity, thereby achieving a sealing effect. When the scale inhibitor is sprayed, the valve assembly 37 controls the connection between the first and second pipes, and the storage tank 35 supplies the scale inhibitor into the first flow channel. Through the coordinated use of the above components, the scale inhibitor is intermittently injected into the vessel 1 according to the reaction process, reducing the amount of scale inhibitor used.

[0071] Optionally, the first, second, and third pipes are all equipped with check valves.

[0072] Optionally, valve assembly 37 can be a three-way solenoid valve located at the connection of the first pipeline, the second pipeline, and the third pipeline. Alternatively, valve assembly 37 can include a first valve, a second valve, and a third valve, with the first valve located in the first pipeline, the second valve located in the second pipeline, and the third valve located in the third pipeline, achieving the switching purpose through the cooperation of the first valve, the second valve, and the third valve.

[0073] In this embodiment, during the high-pressure leaching reaction of laterite nickel ore, slurry, acid, and high-temperature, high-pressure steam need to be injected into the reactor body 1. The slurry and acid can react, while the high-temperature, high-pressure steam can provide a high-temperature, high-pressure environment for the reaction to increase the reaction rate. Therefore, the gas source device 36 can be the steam source of the plant area. That is to say, the gas source device 36 can deliver high-temperature, high-pressure steam into the reactor cavity through the first flow channel. This setting eliminates the need for additional gas source equipment and reduces energy consumption.

[0074] Optionally, such as Figure 1 As shown, the vessel body 1 is provided with multiple baffles 4 spaced apart along the slurry flow channel. The multiple baffles 4 divide the vessel cavity into multiple compartments connected on the upper side, thereby extending the time of the slurry in the vessel body 1. Each compartment is provided with a stirring device 2 and a cleaning device 3. The stirring device 2 can improve the material mixing rate in each compartment, while the cleaning device 3 can clean the blades 221 of the corresponding stirring device 2.

[0075] For ease of understanding, combined with Figures 1-8 The working process of the reactor is explained as follows:

[0076] 1) When the reactor is working normally, the first drive motor 332 drives the lead screw 331 to rotate, so as to drive the brush 32 to move vertically upward until the brush 32 moves to the top of the reactor cavity and is in a avoidance state;

[0077] 2) Valve assembly 37 controls the liquid storage tank 35 to connect with the first flow channel so as to inject scale inhibitor into the vessel 1 through the liquid spray pipe 26 to slow down the scaling rate of the stirring paddle 22. The stirring motor 25 starts and drives the stirring shaft 21 and the stirring paddle 22 to work through the first bevel gear 23 and the second bevel gear 24.

[0078] 3) When the reactor is shut down for descaling, the material in the reactor body 1 is emptied. The first drive motor 332 drives the brush 32 to move downward until the brush 32 is flush with the stirring paddle 22. At this time, the brush bristles 322 abut against the blades 221. The first drive motor 332 stops working, and the second drive motor 343 starts, driving the mounting shaft 31 and the brush 32 to rotate. The valve assembly 37 controls the liquid storage tank 35 to disconnect from the first flow channel. The stirring device 2 rotates in coordination with the brush 32. The rotating brush 32 completes the descaling of the blades 221. At the same time, the brush 32 can also reciprocate in the vertical direction during rotation, which can brush the side wall of the reactor body 1 that is in contact with the brush 32.

[0079] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0080] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A reaction vessel, characterized in that, include: The vessel body (1); A stirring device (2) includes a stirring shaft (21) and a stirring paddle (22). The stirring shaft (21) is rotatably mounted on the vessel body (1) along a vertical axis, and its lower end extends into the vessel cavity of the vessel body (1). The stirring paddle (22) is mounted on the lower end of the stirring shaft (21). The cleaning device (3) includes a mounting shaft (31) and a brush (32). The mounting shaft (31) is rotatably mounted on the vessel body (1) along the vertical axis and is spaced apart from the stirring shaft (21). The brush (32) is movably mounted on the mounting shaft (31) in the vertical direction to switch between a cleaning state and an avoidance state. The brush (32) can abut against the stirring paddle (22). The mounting shaft (31) drives the brush (32) to rotate.

2. The reaction vessel according to claim 1, characterized in that, The cleaning device (3) further includes a first drive assembly (33) and a second drive assembly (34). The first drive assembly (33) is disposed on the mounting shaft (31) and is connected to the brush (32) to drive the brush (32) to move in the vertical direction. The second drive assembly (34) is connected to the mounting shaft (31) to drive the mounting shaft (31) to rotate.

3. The reaction vessel according to claim 2, characterized in that, The brush (32) is provided with a plurality of mounting holes (3211) spaced apart along the middle of the brush (32); The mounting shaft (31) is hollow, and a plurality of grooves (311) are provided around the circumference of the mounting shaft (31). The grooves (311) penetrate the inner and outer walls of the mounting shaft (31). A mounting wall (312) is formed between two adjacent grooves (311). The mounting wall (312) is adapted to the mounting hole (3211). The brush (32) is slidably mounted on the mounting wall (312).

4. The reaction vessel according to claim 3, characterized in that, The brush (32) has a threaded hole (3212) in the middle; The first drive assembly (33) includes a lead screw (331) and a first drive motor (332). The lead screw (331) is rotatably mounted in the mounting shaft (31) along the vertical axis, and the lead screw (331) is threadedly engaged with the brush (32). The first drive motor (332) is mounted on the upper end of the mounting shaft (31), and the main shaft of the first drive motor (332) is connected to the lead screw (331).

5. The reaction vessel according to claim 2, characterized in that, The second drive assembly (34) includes a driving bevel gear (341), a driven bevel gear (342), and a second drive motor (343). The driving bevel gear (341) is rotatably mounted on the vessel body (1) along a horizontal axis. The driven bevel gear (342) is mounted on the mounting shaft (31). The driving bevel gear (341) and the driven bevel gear (342) mesh. The main shaft of the second drive motor (343) is connected to the driving bevel gear (341).

6. The reaction vessel according to any one of claims 1-5, characterized in that, The stirring shaft (21) is provided with a first flow channel extending in a vertical direction. The lower end of the first flow channel is provided with a spray hole facing the stirring paddle (22) so as to spray scale inhibitor onto the stirring paddle (22) through the first flow channel.

7. The reaction vessel according to claim 6, characterized in that, The cleaning device (3) further includes a liquid storage tank (35) and a valve assembly (37). The liquid storage tank (35) contains a scale inhibitor. The liquid storage tank (35) is connected to the upper end of the first flow channel through the valve assembly (37). The valve assembly (37) is used to connect or disconnect the liquid storage tank (35) from the first flow channel.

8. The reaction vessel according to claim 6, characterized in that, The stirring paddle (22) includes a plurality of blades (221), which are spaced apart circumferentially along the stirring shaft (21).

9. The reaction vessel according to claim 8, characterized in that, The cleaning device (3) further includes a spray pipe (26), which is installed on the stirring shaft (21) and located on opposite sides of the blade (221). The spray pipe (26) is connected to the first flow channel. The spray pipe (26) is provided with a plurality of spray holes spaced apart along its axial direction. The spray holes are arranged facing the side of the blade (221).

10. The reaction vessel according to claim 1, characterized in that, The vessel cavity is provided with a plurality of baffles (4) spaced apart along the slurry flow channel. The plurality of baffles (4) divide the vessel cavity into a plurality of compartments connected on the upper side. Each compartment is provided with the stirring device (2) and the cleaning device (3).

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