Titanium dioxide preparation device and method

Abstract

The invention discloses a titanium dioxide preparation device, and relates to the technical field of chemical engineering. The reaction device is fixed on a lower platform of the movable vertical frame; the washing devices are arranged right above the reaction device at intervals; the drying device is arranged right above the washing device at intervals, and the reaction device, the washing device and the drying device are fixedly connected with the movable vertical frame through fixing clamps; the fixed top cover is fixed at the top of the drying device; the spacing device is arranged among the reaction device, the washing device and the drying device and is fixedly connected with the movable vertical frame; and a lifting adjusting device and a stirring device are also arranged in the reaction device, the washing device and the drying device. According to the invention, integrated arrangement is adopted, mixing reaction, filtering, washing and drying procedures are continuously carried out, so that the preparation process of titanium dioxide is quicker and more convenient, and the preparation efficiency and the product quality are effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of chemical technology, and more specifically, to a titanium dioxide preparation device and method. Background Art

[0002] Titanium dioxide is a common inorganic compound and is widely used in the fields of photocatalysis, electrochemical energy storage, solar cells, etc. At present, the preparation methods of titanium dioxide mainly include sulfuric acid method, chlorination method, sol-gel method, hydrothermal method and thermal decomposition method, etc. The hydrothermal method is to prepare titanium dioxide by mixing titanate, water and acid or alkali under high temperature and high pressure. The titanium dioxide prepared by this method usually has the characteristics of uniform particles and high crystallinity. At present, in the process of preparing titanium dioxide by hydrothermal method, after the reaction is completed, it is necessary to filter and separate, wash and dry. However, the existing preparation device needs to carry out the above-mentioned processes separately, and when the mixture is reacted, it is not fully stirred, resulting in incomplete reaction, causing waste of raw materials, and when washing and drying, the precipitate cannot be effectively dispersed, and it is easy to fail to fully wash due to the accumulation of precipitate, and when drying, it leads to uneven drying, which affects the quality of the prepared titanium dioxide. Therefore, it is necessary to provide a titanium dioxide preparation device and method to solve the problems raised in the above background technology. Summary of the invention

[0003] To achieve the above object, the present invention provides the following technical solution: a titanium dioxide preparation device and method, comprising:

[0004] Mobile stand;

[0005] The reaction device is fixed on the lower platform of the mobile stand and is fixedly connected to the mobile stand via a fixing clamp;

[0006] The washing device is arranged at a distance just above the reaction device and is fixedly connected to the movable stand by a fixing clamp;

[0007] The drying device is arranged at a distance just above the washing device and is fixedly connected to the movable stand by a fixing clamp;

[0008] A fixed top cover is fixed on the top of the drying device;

[0009] A spacer device is arranged between the reaction device, the washing device and the drying device, and the spacer device is fixedly connected to the movable stand;

[0010] A lifting and adjusting device, the bottom of which is fixedly connected to the inner side of the reaction device, and the top of which is fixedly connected to the bottom of the fixed top cover;

[0011] The stirring device is arranged in the reaction device, the washing device and the drying device and is fixedly connected with the fixed top cover.

[0012] Further, preferably, the reaction device comprises:

[0013] Reactor, fixed on the lower platform of the overload mobile stand;

[0014] A bearing bottom plate is arranged inside the reaction kettle;

[0015] A discharge port is arranged at the center of the bearing bottom plate;

[0016] A valve port is fixed at the bottom of the reactor and corresponds to the discharge port;

[0017] The filter cartridge is arranged in the reaction kettle, the bottom of which is in contact with the supporting bottom plate, and the bottom center of the filter cartridge is rotatably connected to the stirring device;

[0018] The protective shell is fixed on the top of the reaction kettle, and the height of the protective shell is higher than the height of the filter cartridge.

[0019] Further, as a preference, the spacing device comprises:

[0020] A first spacer assembly is disposed between the reaction device and the washing device;

[0021] A second spacing component is arranged between the washing device and the drying device;

[0022] The limiting columns are symmetrically distributed with two groups about the mobile stand, and are arranged between the first spacing component and the second spacing component to connect the first spacing component and the second spacing component;

[0023] Two connecting pieces are symmetrically arranged to connect each set of limit columns and the movable frame.

[0024] Further, preferably, the first spacing component comprises:

[0025] The first pushing platform is symmetrically distributed with two groups, located on both sides of the reaction device and fixed at the bottom of the limiting column;

[0026] Two first moving blocks are symmetrically arranged and slidably arranged on the first pushing platform;

[0027] The first spacing semicircular surface is arranged corresponding to the first moving block and fixedly connected to the first moving block. The first spacing semicircular surface corresponds to the interval between the reaction device and the washing device. The two first spacing semicircular surfaces constitute a complete first spacing circular surface.

[0028] Further, preferably, the second spacing component comprises:

[0029] The second pushing platform is symmetrically arranged in two groups, located on both sides of the washing device and fixed on the top of the limiting column;

[0030] The second moving blocks are symmetrically arranged with two of them and are slidably arranged on the second pushing platform;

[0031] The second spacing semicircular surface is arranged corresponding to the second moving block and fixedly connected to the second moving block. The second spacing semicircular surface corresponds to the interval between the washing device and the drying device. The two second spacing semicircular surfaces constitute a complete second spacing circular surface.

[0032] Furthermore, preferably, closed holes and through holes are provided on the first interval semicircular surface and the second interval semicircular surface, and the closed hole is provided at the center of the interval circular surface, corresponding to the stirring device; and two through holes are symmetrically distributed and located at the intersection of the two interval semicircular surfaces, corresponding to the lifting and lowering adjustment device.

[0033] Further, as a preference, the lifting and adjusting device comprises:

[0034] Two lifting rails are symmetrically arranged and vertically arranged between the fixed top cover and the reactor, and the lifting rails correspond to the through holes on the spacing circular surface;

[0035] A sliding block is slidably arranged on the lifting slide rail, and the sliding block is fixedly connected to the top of the filter cylinder;

[0036] The vertical body is slidably arranged in the lifting slide rail and is located below the sliding block. The vertical body is connected to the sliding block through a traction rope, and the length of the traction rope is the same as the height of the filter cartridge.

[0037] Further, as a preference, the stirring device comprises:

[0038] A closing member is rotatably arranged at the bottom of the filter cartridge and corresponds to the discharge port on the bearing bottom plate;

[0039] Multi-section telescopic shaft, the bottom is fixedly connected to the closure;

[0040] A stirring blade is fixed to one end of the multi-section telescopic shaft close to the closing member;

[0041] Two shaft segments are vertically distributed and fixed at the connection of the multi-segment telescopic shaft, and the shaft segments correspond to the closed holes on the spaced semicircular surface;

[0042] The rotating motor is fixed on the fixed top cover and is fixedly connected with the top of the multi-section telescopic shaft.

[0043] A method for preparing titanium dioxide comprises the following steps:

[0044] Step 1: First, sodium titanate and sulfuric acid are mixed in a certain proportion, and then poured into a reactor. Then, the reactor is heated for hydrothermal reaction, and the stirring blade is controlled by a rotating motor to rotate to stir the mixture.

[0045] Step 2: After the hydrothermal reaction is completed, the sliding block slides upward on the lifting rail, thereby driving the filter cartridge to move upward, filtering and separating the generated precipitate, and the residual solution flows out through the discharge port on the bearing bottom plate and is discharged through the valve port;

[0046] Step 3: When the filter cartridge moves to the washing device, the bottom of the filter cartridge is sealed by the first spacer assembly, and then distilled water is injected into the washing device, and the stirring blade rotates to assist washing. After washing, the filter cartridge moves upward and the distilled water is discharged downward, and the process is repeated several times until the impurities in the precipitate are completely removed;

[0047] Step 4: The filter cartridge is then moved to the drying device, the bottom of the filter cartridge is sealed by the second spacer assembly, and then the precipitate is dried by the drying device to obtain a pure titanium dioxide product.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] In the present invention, an integrated setting is adopted to continuously carry out the mixing reaction, filtering washing and drying processes, so that the preparation process of titanium dioxide is faster and more convenient; the mixture is mixed and reacted by the setting of the reaction device, and mixed and stirred by the stirring device to carry out a rapid and sufficient reaction; the precipitate after the reaction is washed and dried in sequence by the setting of the washing device and the drying device, and each working area is distinguished under the action of the spacing device, and under the action of the stirring device, the precipitate is moved and dispersed during the washing and drying process, the washing and drying process is accelerated, and the preparation efficiency and product quality are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the overall structure of a titanium dioxide preparation device and method;

[0051] Figure 2 is a schematic diagram of the structure of the reaction device;

[0052] Figure 3 is a schematic diagram of the structure of the spacer device;

[0053] Figure 4 is a schematic diagram of the structure of the spacer assembly;

[0054] Figure 5 It is a structural schematic diagram of a lifting and lowering regulating device and a stirring device;

[0055] Figure 6 It is a schematic diagram of the structure in the mixture reaction mode;

[0056] Figure 7 It is a structural schematic diagram in the filtering and washing mode;

[0057] Figure 8 It is a schematic diagram of the structure in the drying mode;

[0058] In the figure: 1. mobile stand; 2. reaction device; 3. washing device; 4. drying device; 5. fixed top cover; 6. spacing device; 7. lifting and adjusting device; 8. stirring device; 21. reaction kettle; 22. bearing bottom plate; 23. discharge port; 24. valve port; 25. filter cartridge; 26. protective shell; 61. first spacing component; 62. second spacing component; 63. limiting column; 64. connecting piece; 71. lifting slide rail; 72. sliding block; 73. vertical body; 81. closing piece; 82. multi-section telescopic shaft; 83. stirring blade; 84. shaft section; 85. rotating motor; 611. first pushing platform; 612. first moving block; 613. first spacing semicircular surface; 621. second pushing platform; 622. second moving block; 623. second spacing semicircular surface; 6131. ​​closing hole; 6132. through hole. DETAILED DESCRIPTION

[0059] See also Figures 1 to 8 In an embodiment of the present invention, a titanium dioxide preparation device and method includes:

[0060] Mobile stand 1;

[0061] The reaction device 2 is fixed on the lower platform of the mobile stand 1 and is fixedly connected to the mobile stand 1 through a fixing clamp;

[0062] The washing device 3 is arranged at a distance just above the reaction device 2 and is fixedly connected to the movable stand 1 through a fixing clamp;

[0063] The drying device 4 is spaced apart and arranged just above the washing device 3 and is fixedly connected to the movable stand 1 through a fixing clamp;

[0064] A fixed top cover 5 is fixed on the top of the drying device 4;

[0065] A spacer 6 is disposed between the reaction device 2, the washing device 3 and the drying device 4, and the spacer 6 is fixedly connected to the mobile stand 1;

[0066] A lifting and adjusting device 7, the bottom of which is fixedly connected to the inner side of the reaction device 2, and the top of which is fixedly connected to the bottom of the fixed top cover 5;

[0067] The stirring device 8 is arranged in the reaction device 2 , the washing device 3 and the drying device 4 , and is fixedly connected to the fixed top cover 5 .

[0068] In this embodiment, the reaction device 2 comprises:

[0069] Reactor 21, fixed on the lower platform of overload mobile stand 1;

[0070] The supporting bottom plate 22 is arranged inside the reaction kettle 21;

[0071] The discharge port 23 is arranged at the center of the carrying bottom plate 22;

[0072] The valve port 24 is fixed at the bottom of the reaction vessel 21 and corresponds to the discharge port 23;

[0073] The filter cartridge 25 is disposed in the reaction kettle 21, the bottom of which is in contact with the supporting bottom plate 22, and the bottom center of the filter cartridge 25 is rotatably connected to the stirring device 8;

[0074] The protective shell 26 is fixed on the top of the reaction kettle 21 , and the height of the protective shell 26 is higher than the height of the filter cartridge 25 .

[0075] That is to say, under the action of the lifting and adjusting device 7, the stirring device 8 and the filter cartridge 25 are driven to move downward, and the discharge port 23 on the supporting bottom plate 22 is closed. At the same time, the filter cartridge 25 is fitted with the inner wall of the reactor 21. After the mixed solution of sodium titanate and sulfuric acid is poured into the reactor 21, the reactor 21 is heated to 120°C. Under the stirring of the stirring device 8, the hydrothermal reaction is started. After the hydrothermal reaction is completed, the filter cartridge 25 can be driven upward by the lifting and adjusting device 7 to separate the bottom of the stirring device 8 from the discharge port 23. The residual liquid in the reactor 21 flows to the valve port 24 through the discharge port 23 and is discharged from the reactor 21. The precipitate obtained by the reaction is collected by the filter cartridge 25 to complete the solid-liquid separation. It should be noted that the height of the protective shell 26 here is higher than the height of the filter cartridge 25, so that the filter cartridge 25 can be completely separated from the reactor 21, and the height of the washing device 3 and the drying device 4 is the same as the height of the protective shell 26, ensuring that the filter cartridge 25 can complete the washing and drying work in the washing device 3 and the drying device 4.

[0076] In this embodiment, the spacing device 6 includes:

[0077] A first spacer assembly 61 is disposed between the reaction device 2 and the washing device 3;

[0078] A second spacing component 62 is disposed between the washing device 3 and the drying device 4;

[0079] The limiting posts 63 are symmetrically distributed with two groups about the mobile stand 1, and are arranged between the first spacing component 61 and the second spacing component 62 to connect the first spacing component 61 and the second spacing component 62;

[0080] Two connecting members 64 are symmetrically arranged to connect each group of limiting columns 63 and the movable stand 1 .

[0081] That is to say, under the action of the first spacer component 61, the reaction device 2 and the washing device 3 are separated. When the mixed liquid undergoes a hydrothermal reaction in the reaction device 2, the top of the reaction device 2 can be blocked by the first spacer component 61 to keep the internal temperature of the reaction device 2 constant and continuously heated; when the precipitate is washed, the bottom of the washing device 3 can also be blocked by the first spacer component 61, so that the distilled water can be discharged after fully washing the precipitate in the washing device 3; when the precipitate is dried, the bottom of the drying device 4 can be sealed by the second spacer component 62, so that the drying device 4 is dried in a closed constant temperature environment to obtain a pure titanium dioxide product.

[0082] In this embodiment, the first spacing component 61 includes:

[0083] The first pushing platform 611 is symmetrically provided with two groups, located on both sides of the reaction device 2, and fixed at the bottom of the limiting column 63;

[0084] Two first moving blocks 612 are symmetrically arranged and slidably arranged on the first pushing platform 611;

[0085] The first spacing semicircular surface 613 is arranged corresponding to the first moving block 612, and is fixedly connected to the first moving block 612. The first spacing semicircular surface 613 corresponds to the interval between the reaction device 2 and the washing device 3. The two first spacing semicircular surfaces 613 constitute a complete first spacing circular surface.

[0086] That is to say, under the push of the first moving block 612, the first moving blocks 612 on both sides are driven to move toward the center of the two groups of first pushing platforms 611, and then the first spacing semicircular surface 613 is pushed to move toward the gap between the reaction device 2 and the washing device 3, and the gap between the reaction device 2 and the washing device 3 is closed, so that the mixed liquid can undergo a hydrothermal reaction in the reactor 21. It should be noted that there is a gas flow channel at the connection between the first spacing semicircular surface 613 and the lifting and adjusting device 7 to prevent the internal air pressure of the reaction device 2 from being too high; conversely, under the push of the first moving block 612, the first moving blocks 612 on both sides are driven to move toward the center of the two groups away from the first pushing platform 611, and then the first spacing semicircular surface 613 is pushed to detach from the gap between the reaction device 2 and the washing device 3, so that the reaction device 2 and the washing device 3 are connected, so that the filter cartridge 25 can bring the precipitate to the washing device 3 for washing under the drive of the lifting and adjusting device 7.

[0087] In this embodiment, the second spacing component 62 includes:

[0088] The second pushing platform 621 is symmetrically provided with two groups, located on both sides of the washing device 3, and fixed on the top of the limiting column 63;

[0089] Two second moving blocks 622 are symmetrically arranged and slidably arranged on the second pushing platform 621;

[0090] The second spacing semicircular surface 623 is arranged corresponding to the second moving block 622, and is fixedly connected to the second moving block 622. The second spacing semicircular surface 623 corresponds to the interval between the washing device 3 and the drying device 4. The two second spacing semicircular surfaces 623 constitute a complete second spacing circular surface.

[0091] That is to say, under the push of the second moving block 622, the second moving blocks 622 on both sides are driven to move toward the center of the two groups of second pushing platforms 621, and then the second spacing semicircular surface 623 is pushed to move toward the gap between the washing device 3 and the drying device 4, and the gap between the washing device 3 and the drying device 4 is closed, so that the sediment is dried in a sealed constant temperature environment in the drying device 4; conversely, under the push of the second moving block 622, the second moving blocks 622 on both sides are driven to move toward the center of the two groups away from the second pushing platforms 621, and then the second spacing semicircular surface 623 is pushed to detach from the gap between the washing device 3 and the drying device 4, so that the washing device 3 and the drying device 4 are connected, so that the filter cartridge 25, driven by the lifting and adjusting device 7, can bring the washed sediment to the drying device 4 for drying.

[0092] In this embodiment, closed holes 6131 and through holes 6132 are provided on the first interval semicircular surface 613 and the second interval semicircular surface 623. The closed hole 6131 is provided at the center of the interval circular surface, corresponding to the stirring device 8; two through holes 6132 are symmetrically distributed and located at the intersection of the two interval semicircular surfaces, corresponding to the lifting and lowering adjustment device 7.

[0093] That is to say, under the action of the closed hole 6131, the stirring device 8 is ensured to stir the inside of the reactor 21 while maintaining the closure of the spacing circle to the top of the reactor 2, and the size of the closed hole 6131 is the same as the bottom size of the stirring device 8, so that when the precipitate is washed or dried, the closed hole 6131 can be closed by the stirring device 8; under the action of the through hole 6132, the normal operation of the lifting and adjusting device 7 is maintained. When the reaction device 2 performs a hydrothermal reaction, the gas flow at the through hole 6132 can effectively reduce the internal air pressure of the reactor 21. When the precipitate is washed or dried, the through hole 6132 can be closed by the lifting and adjusting device 7, so that the washing device 3 and the drying device 4 are in a closed state.

[0094] In this embodiment, the lifting and adjusting device 7 includes:

[0095] Two lifting rails 71 are symmetrically arranged and vertically arranged between the fixed top cover 5 and the reactor 21, and the lifting rails 71 correspond to the through holes 6132 on the spacing circular surface;

[0096] A sliding block 72 is slidably disposed on the lifting rail 71, and the sliding block 72 is fixedly connected to the top of the filter cartridge 25;

[0097] The vertical body 73 is slidably disposed in the lifting slide rail 71 and is located below the sliding block 72 . The vertical body 73 is connected to the sliding block 72 via a traction rope. The length of the traction rope is the same as the height of the filter cartridge 25 .

[0098] That is to say, driven by the sliding block 72, the sliding block 72 drives the filter cartridge 25 to slide on the lifting slide rail 71. When the sliding block 72 drives the filter cartridge 25 to move into the washing device 3, the bottom of the stirring device 8 is connected to the closed hole 6131 on the first interval semicircular surface 613. The vertical body 73 is pulled by the traction rope to close the through hole 6132 on the first interval semicircular surface 613, so that the washing device 3 is in a closed state, so that the distilled water can fully wash the sediment, and then the sliding block 72 is again The filter cartridge 25 is then driven upward to discharge the distilled water downward through the closed hole 6131 and the through hole 6132. Similarly, when the sliding block 72 drives the filter cartridge 25 to move into the drying device 4, the bottom of the stirring device 8 is connected to the closed hole 6131 on the second interval semicircular surface 623, and the pituitary body 73 is pulled by the traction rope to close the through hole 6132 on the second interval semicircular surface 623, so that the drying device 4 is in a closed state, and the precipitate is closed and dried at a constant temperature to obtain a pure titanium dioxide product.

[0099] In this embodiment, the stirring device 8 comprises:

[0100] The closing member 81 is rotatably disposed at the bottom of the filter cartridge 25 and corresponds to the discharge port 23 on the bearing bottom plate 22;

[0101] The bottom of the multi-section telescopic shaft 82 is fixedly connected to the closure member 81;

[0102] The stirring blade 83 is fixed to one end of the multi-section telescopic shaft 82 close to the sealing member 81;

[0103] Two shaft segments 84 are vertically distributed and fixed at the connection of the multi-segment telescopic shaft 82, and the shaft segments 84 correspond to the closed holes 6131 on the spaced semicircular surface;

[0104] The rotating motor 85 is fixed on the fixed top cover 5 and is fixedly connected to the top of the multi-section telescopic shaft 82 .

[0105] That is to say, driven by the rotating motor 85, the stirring blade 83 can stir the mixed liquid in the reactor 21 to assist the mixed liquid in hydrothermal reaction, and can also disperse and stir the precipitate in the washing device 3 to make the distilled water and the precipitate fully contact, and can also stir and disperse the precipitate in the drying device 4 to make the precipitate dry evenly; when the sliding block 72 drives the filter cartridge 25 to move upward in sequence, the multi-section telescopic shaft 82 shrinks in sequence, so that the closing member 81 is connected with the body shaft section 84 in sequence to the closing hole 6131 on the first interval semicircular surface 613 and the second interval semicircular surface 623, thereby maintaining the sealing of the washing device 3 and the drying device 4.

[0106] In this embodiment, a method for preparing titanium dioxide is characterized by comprising the following steps:

[0107] Step 1: First, sodium titanate and sulfuric acid are mixed in a certain proportion, poured into the reaction kettle 21 after mixing, and the first spacer component 61 is controlled to seal the top of the reaction device 2, and then the reaction kettle 21 is heated to perform a hydrothermal reaction, and the stirring blade 83 is controlled to rotate by the rotating motor 85 to stir the mixed liquid;

[0108] Step 2: After the hydrothermal reaction is completed, the sliding block 72 slides upward on the lifting rail 71, thereby driving the filter cartridge 25 to move upward, so that the sealing member 81 is separated from the discharge port 23 on the supporting bottom plate 22, and the generated precipitate is filtered and separated, while the residual solution flows out through the discharge port 23 on the supporting bottom plate 22 and is discharged through the valve port 24;

[0109] Step 3: When the filter cartridge 25 moves to the washing device 3, the first spacing component 61 seals the bottom of the filter cartridge 25, the sealing member 81 seals the sealing hole 6131, and the vertical body 73 seals the through hole 6132, and then distilled water is injected into the washing device 3, and the stirring blade 83 rotates to assist in washing. After washing, the filter cartridge 25 moves upward, so that the sealing member 81 is separated from the sealing hole 6131, and the vertical body 73 is separated from the through hole 6132, and the distilled water is discharged downward, and the process is repeated for multiple times until the impurities in the precipitate are completely removed;

[0110] Step 4: The filter cartridge 25 is then moved to the drying device 4, the second spacer assembly 62 seals the bottom of the filter cartridge 25, the sealing member 81 seals the sealing hole 6131, the pituitary body 73 seals the through hole 6132, and then the drying device 4 dries the precipitate under a closed constant temperature state to obtain a pure titanium dioxide product.

[0111] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A titanium dioxide preparation device, characterized in that: include: Mobile stand (1); The reaction device (2) is fixed on the lower platform of the mobile stand (1) and is fixedly connected to the mobile stand (1) via a fixing clamp; A washing device (3) is arranged at a distance just above the reaction device (2) and is fixedly connected to the movable stand (1) via a fixing clamp; A drying device (4) is arranged at a distance just above the washing device (3) and is fixedly connected to the movable stand (1) via a fixing clamp; A fixed top cover (5) fixed on the top of the drying device (4); A spacer device (6) is arranged between the reaction device (2), the washing device (3) and the drying device (4), and the spacer device (6) is fixedly connected to the movable stand (1); A lifting and lowering adjustment device (7), the bottom of which is fixedly connected to the inner side of the reaction device (2), and the top of which is fixedly connected to the bottom of the fixed top cover (5); The stirring device (8) is arranged in the reaction device (2), the washing device (3) and the drying device (4), and is fixedly connected to the fixed top cover (5).

2. A titanium dioxide preparation device according to claim 1, characterized in that: The reaction device (2) comprises: The reaction kettle (21) is fixed on the lower platform of the overload movable stand (1); A bearing bottom plate (22) is arranged inside the reaction kettle (21); A discharge port (23) is arranged at the center of the supporting bottom plate (22); A valve port (24) is fixed at the bottom of the reaction vessel (21) and corresponds to the discharge port (23); A filter cartridge (25) is disposed in the reaction kettle (21), the bottom of which is in contact with the supporting bottom plate (22), and the bottom center of the filter cartridge (25) is rotatably connected to the stirring device (8); The protective shell (26) is fixed on the top of the reaction kettle (21), and the height of the protective shell (26) is higher than the height of the filter cartridge (25).

3. A titanium dioxide preparation device according to claim 2, characterized in that: The spacer (6) comprises: A first spacer assembly (61) is arranged between the reaction device (2) and the washing device (3); A second spacing component (62) is disposed between the washing device (3) and the drying device (4); The limiting columns (63) are provided in two groups symmetrically distributed about the movable stand (1), and are arranged between the first spacing component (61) and the second spacing component (62), connecting the first spacing component (61) and the second spacing component (62); Two connecting members (64) are symmetrically arranged to connect each group of limiting columns (63) and the movable stand (1).

4. A titanium dioxide preparation device according to claim 3, characterized in that: The first spacing component (61) comprises: The first pushing platform (611) is symmetrically distributed in two groups, located on both sides of the reaction device (2) and fixed at the bottom of the limiting column (63); Two first moving blocks (612) are symmetrically arranged and slidably arranged on the first pushing platform (611); The first spacing semicircular surface (613) is arranged corresponding to the first moving block (612) and is fixedly connected to the first moving block (612). The first spacing semicircular surface (613) corresponds to the spacing between the reaction device (2) and the washing device (3). The two first spacing semicircular surfaces (613) constitute a complete first spacing circular surface.

5. A titanium dioxide preparation device according to claim 4, characterized in that: The second spacing component (62) comprises: The second pushing platform (621) is symmetrically arranged in two groups, located on both sides of the washing device (3) and fixed on the top of the limiting column (63); Two second moving blocks (622) are symmetrically arranged and slidably arranged on the second pushing platform (621); The second spacing semicircular surface (623) is arranged corresponding to the second moving block (622) and is fixedly connected to the second moving block (622). The second spacing semicircular surface (623) corresponds to the spacing between the washing device (3) and the drying device (4). The two second spacing semicircular surfaces (623) constitute a complete second spacing circular surface.

6. A titanium dioxide preparation device according to claim 5, characterized in that: A closed hole (6131) and a through hole (6132) are provided on both the first spaced semicircular surface (613) and the second spaced semicircular surface (623); the closed hole (6131) is provided at the center of the spaced semicircular surface, corresponding to the stirring device (8); and two through holes (6132) are symmetrically distributed and located at the intersection of the two spaced semicircular surfaces, corresponding to the lifting and lowering adjustment device (7).

7. A titanium dioxide preparation device according to claim 6, characterized in that: The lifting and lowering adjustment device (7) comprises: Two lifting rails (71) are symmetrically arranged and vertically disposed between the fixed top cover (5) and the reaction kettle (21), and the lifting rails (71) correspond to the through holes (6132) on the spacing circular surface; A sliding block (72) is slidably disposed on the lifting slide rail (71), and the sliding block (72) is fixedly connected to the top of the filter cartridge (25); The vertical body (73) is slidably disposed in the lifting slide rail (71) and is located below the sliding block (72). The vertical body (73) is connected to the sliding block (72) via a traction rope. The length of the traction rope is the same as the height of the filter cartridge (25).

8. A titanium dioxide preparation device according to claim 7, characterized in that: The stirring device (8) comprises: A closing member (81) is rotatably disposed at the bottom of the filter cartridge (25) and corresponds to the discharge port (23) on the supporting bottom plate (22); A multi-section telescopic shaft (82), the bottom of which is fixedly connected to the closing member (81); A stirring blade (83) is fixed to one end of the multi-section telescopic shaft (82) close to the sealing member (81); Two shaft segments (84) are vertically distributed and fixed at the connection of the multi-segment telescopic shaft (82), and the shaft segments (84) correspond to the closed holes (6131) on the spaced semicircular surface; The rotating motor (85) is fixed on the fixed top cover (5) and is fixedly connected to the top of the multi-section telescopic shaft (82).

9. A method for preparing titanium dioxide according to claim 8, characterized in that: The steps include: Step 1: firstly, sodium titanate and sulfuric acid are mixed in a certain proportion, and then poured into a reaction kettle (21), and then the reaction kettle (21) is heated to perform a hydrothermal reaction, and the stirring blade (83) is controlled to rotate by a rotating motor (85) to stir the mixed liquid; Step 2: After the hydrothermal reaction is completed, the sliding block (72) slides upward on the lifting slide rail (71), thereby driving the filter cartridge (25) to move upward, filtering and separating the generated precipitate, and the residual solution flows out through the discharge port (23) on the supporting bottom plate (22) and is discharged through the valve port (24); Step 3: When the filter cartridge (25) moves to the washing device (3), the bottom of the filter cartridge (25) is sealed by the first spacer assembly (61), and then distilled water is injected into the washing device (3). The stirring blade (83) rotates to assist in washing. After washing, the filter cartridge (25) moves upward and the distilled water is discharged downward. This process is repeated multiple times until the impurities in the precipitate are completely removed. Step 4: The filter cartridge (25) is then moved to the drying device (4), the bottom of the filter cartridge (25) is sealed by the second spacer assembly (62), and then the precipitate is dried by the drying device (4) to obtain a pure titanium dioxide product.

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