High-pressure reaction container for preparing silicon dioxide catalyst

Abstract

The invention relates to the technical field of silicon dioxide preparation, and discloses a high-pressure reaction container for preparing a silicon dioxide catalyst, which comprises a kettle body, a kettle cover and a mixing and cleaning assembly, the mixing and cleaning assembly comprises a stirring shaft, a blade assembly and a power assembly, one end of the stirring shaft extends into the kettle body and is connected with the blade assembly, the other end of the stirring shaft is connected with the power assembly, and the power assembly is used for driving the stirring shaft to move in the vertical direction and driving the stirring shaft to rotate; the blade assembly comprises a plurality of blade bodies, mounting cavities are formed in the blade bodies, connecting blades are slidably connected into the mounting cavities, elastic parts are arranged between one ends of the connecting blades and the cavity bottoms of the mounting cavities, and arc-shaped scraping plates making contact with the inner wall of the kettle body are arranged at the other ends of the connecting blades. According to the present invention, the circumferential and axial mixing can be simultaneously performed on the mixture raw material, and the arc-shaped scraping plate can be used to clean the cylindrical inner wall of the kettle body and the part of the inner wall of the bottom arc-shaped structure.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon dioxide preparation, and more particularly to a high-pressure reaction container for preparing a silicon dioxide catalyst. Background Art

[0002] Silicon dioxide is a professional chemical term with the chemical formula SiO2. Usually, silicon dioxide is divided into two forms: crystalline silicon dioxide and amorphous silicon dioxide. Due to its particularity, silicon dioxide has a wide range of uses and is often used in glassmaking, water glass, pottery, enamel, etc., and a silicon dioxide reactor is a device for chemical reaction treatment of silicon dioxide.

[0003] In the related technology, the utility model patent with authorization announcement number CN222093357U discloses "a silica reactor, the reactor is arranged in a cylindrical shape, and the top of the reactor is open, support legs are arranged around the bottom of the reactor, a cover plate is arranged on the top of the reactor, and fixed blocks are arranged on the tops of the left and right sides of the reactor, and bolts are arranged between the fixed blocks and the bottom sides of the cover plate; when working, the motor drives the transmission shaft to rotate through the fixed plate through the cooperation of the motor shaft and the connecting plate, and when the transmission shaft rotates, the arc scraper is driven to rotate in accordance with the inner wall of the inner cavity of the reactor through the cooperation of the stirring rod and the connecting block, so that the rotating arc scraper during stirring can achieve the effect of self-descaling, thereby reducing the accumulation of alkali scale, and the connecting plate and the fixed plate are connected by fixing bolts, so they can be disassembled, and the transmission shaft and the stirring rod can be carefully cleaned separately during disassembly."

[0004] Although the above solution can remove the attachments on the inner wall of the reactor to a certain extent, it requires the installation of multiple stirring rods. Too many stirring rods may cause local turbulence to offset each other, affecting the efficiency of mixing the mixture and raw materials. Moreover, the arc scraper can only clean the inner wall of the reactor on the horizontal plane, and the cleaning area is limited. Summary of the Invention

[0005] The present invention provides a high-pressure reaction vessel for preparing silica catalysts, which solves the technical problems in related technologies that excessive stirring rods may cause local turbulence to offset each other, affecting the efficiency of mixing the mixture and raw materials, and that the arc-shaped scraper can only clean the inner wall of the reactor on the horizontal plane, resulting in a limited cleaning area.

[0006] The present invention provides a high-pressure reaction vessel for the preparation of a silica catalyst, comprising a kettle body and a kettle cover. The high-pressure reaction vessel further comprises a mixing and cleaning component, which includes a stirring shaft, a blade component and a power component. The stirring shaft vertically penetrates the kettle cover, one end of which extends into the kettle body and is connected to the blade component, and the other end of which is connected to the power component. The power component is arranged on the kettle body and is used to drive the stirring shaft to move in the vertical direction and drive the stirring shaft to rotate. The blade component includes a plurality of blade bodies, and all the blade bodies are connected to one end of the stirring shaft. An installation cavity is axially formed in the blade body along the radial direction of the stirring shaft. A connecting blade is slidably connected in the installation cavity. An elastic member is arranged between one end of the connecting blade and the bottom of the installation cavity. The other end of the connecting blade is provided with an arc-shaped scraping plate that contacts the inner wall of the kettle body.

[0007] As a further improvement of the present invention, the power component includes an installation frame with a U-shaped structure whose opening faces the kettle body. One end of the installation frame is connected to the kettle body. A lead screw with an axis direction in the vertical direction is rotatably connected between two side arms of the installation frame. One end of the lead screw penetrates the installation frame and is fixedly connected to a first motor. A nut seat is threadedly connected to the lead screw. A connecting rod is fixedly connected to the nut seat. The free end of the connecting rod is fixedly connected to a machine frame. A second motor is fixedly connected to the machine frame. The output end of the second motor is fixedly connected to a speed reducer. The output end of the speed reducer is fixedly connected to the other end of the stirring shaft.

[0008] As a further improvement of the present invention, a guiding hole is axially formed in the installation frame along the axial direction of the lead screw. A guiding rod is fixedly connected to the nut seat. The guiding rod is slidably connected to the guiding hole.

[0009] As a further improvement of the present invention, the number of the blade bodies is 2-4, and the plurality of blade bodies are annularly arrayed about the axis of the stirring shaft.

[0010] As a further improvement of the present invention, in the vertical direction, first chamfers are arranged at both the top and the bottom of the arc-shaped scraping plate, and the directions of the first chamfers are inclined from the edge of the arc-shaped scraping plate towards the middle of the arc-shaped scraping plate.

[0011] As a further improvement of the present invention, in the horizontal direction, second chamfers are arranged on both sides of the arc-shaped scraping plate, and the directions of the second chamfers are inclined from the edge of the arc-shaped scraping plate towards the middle of the arc-shaped scraping plate.

[0012] As a further improvement of the present invention, the circular angle range corresponding to the arc-shaped scraping plate is 5°-30°.

[0013] As a further improvement of the present invention, in the radial direction of the stirring shaft, the cross-sectional shape of the blade body is a cross-shaped structure with a circular ring in the middle and semi-elliptical structures on both sides; in the radial direction of the stirring shaft, the cross-sectional shape of the connecting blade is also a cross-shaped structure with a circular ring in the middle and semi-elliptical structures on both sides.

[0014] As a further improvement of the present invention, the inner top of the kettle cover is fixedly connected to an external gold-plated electromagnet, and the electromagnet is selectively magnetically connected to a scraper assembly, and the scraper assembly includes: an annular scraper in contact with the inner wall of the kettle body, a support rod and a gold-plated iron connecting seat, the two ends of the support rod are respectively fixedly connected to the annular scraper and the connecting seat, and the electromagnet is selectively magnetically connected to the connecting seat.

[0015] As a further improvement of the present invention, a flow channel is opened inside the stirring shaft along its axial direction, a water inlet hole connected to the flow channel is opened on the side of the stirring shaft close to the reducer, and a plurality of water outlet holes connected to the flow channel are opened on the end of the stirring shaft away from the reducer, and the direction of the water outlet holes is toward the cylindrical inner wall of the kettle body, and a one-way valve is provided at the water outlet hole, and the conduction direction of the one-way valve is from the flow channel to the outside.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention provides a power assembly that can drive the stirring shaft to rotate and move the stirring shaft in the vertical direction at the same time. A blade assembly is provided at one end of the stirring shaft extending into the interior of the kettle body. The blade body of the blade assembly is slidably connected to one end of the connecting blade, and the other end of the connecting blade is fixedly connected to an arc-shaped scraper that cooperates with the inner wall of the kettle body. In this way, under the drive of the stirring shaft, the spiral movement of the blade assembly can not only mix the mixture raw materials circumferentially, but also mix the mixture raw materials axially. In addition, while being conducive to the full mixing of the mixture raw materials, the arc scraper can be used to clean the cylindrical inner wall of the kettle body and part of the inner wall of the bottom arc structure, so that the cleaning is more comprehensive, thereby reducing the adhesion of the mixture raw materials or the prepared silica on the inner wall of the kettle body.

[0018] 2. The present invention arranges a scraper assembly on the upper side of the kettle body and uses an electromagnet to selectively attract the scraper assembly. After the preparation of silicon dioxide is completed, the electromagnet is turned off, and the annular scraper in the scraper assembly can clean the cylindrical inner wall of the kettle body under the action of gravity, thereby further cleaning the cylindrical inner wall of the kettle body, and the cleaning effect is better. After cleaning, the power assembly and the blade assembly cooperate to bring the scraper assembly back to the upper side of the kettle body and energize the electromagnet. The scraper assembly is attracted, thereby facilitating the next preparation of silicon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of a first three-dimensional structure of a high-pressure reaction vessel for preparing a silicon dioxide catalyst according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a second three-dimensional structure of a high-pressure reaction vessel for preparing a silicon dioxide catalyst according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the main structure of a high-pressure reaction vessel for preparing a silica catalyst according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of a first main cross-sectional structure of a high-pressure reaction vessel for preparing a silicon dioxide catalyst according to an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 yes Figure 4 Enlarged view of point B in the middle;

[0025] Figure 7 A schematic diagram of a second front cross-sectional structure of a high-pressure reaction vessel for preparing a silicon dioxide catalyst according to an embodiment of the present invention;

[0026] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0027] Figure 9 This is a schematic top-view cross-sectional perspective structural diagram of a high-pressure reaction vessel for preparing a silica catalyst according to an embodiment of the present invention;

[0028] Figure 10 The figure is a schematic top view of the cross-sectional structure of a high-pressure reaction vessel for preparing a silicon dioxide catalyst according to an embodiment of the present invention.

[0029] In the figure: 1. kettle body; 2. kettle cover; 3. mixing and cleaning assembly; 31. stirring shaft; 311. flow channel; 312. water inlet hole; 313. water outlet hole; 32. blade assembly; 321. blade body; 3211. mounting cavity; 322. connecting blade; 323. elastic member; 324. arc scraper; 3241. first chamfer; 3242. second chamfer; 33. power assembly; 331. mounting frame; 3311. guide hole; 332. screw rod; 333. first motor; 334. nut seat; 3341. guide rod; 335. connecting rod; 336. frame; 337. second motor; 338. reducer; 4. electromagnet; 5. scraper assembly; 51. annular scraper; 52. support rod; 53. connecting seat. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0031] like Figures 1-10 As shown, a high-pressure reaction vessel for the preparation of silica catalyst includes a kettle body 1, a kettle cover 2 and a mixing and cleaning component 3, wherein the kettle body 1 and the kettle cover 2 are both of the prior art, and the kettle body 1 includes a cylindrical structure located on the upper side and a hemispherical structure located on the lower side. A jacket is provided on the outer side of the kettle body 1, a discharge port is provided on the bottom of the kettle body 1, and a feed hole, a visual hole and an air inlet are provided on the kettle cover 2. The mixing and cleaning component 3 is mainly used to stir and mix the mixture raw materials put into the kettle body 1 to make the mixing and reaction more sufficient, and can clean the inner wall of the kettle body 1 while stirring the mixture raw materials to reduce the adhesion of the mixture raw materials on the inner wall of the kettle body 1.

[0032] Specifically, if Figure 1 、 Figure 4-10 As shown, the mixing and cleaning assembly 3 includes an agitator shaft 31, a blade assembly 32, and a power assembly 33. The agitator shaft 31 primarily functions as a transmission mechanism. The blade assembly 32 is primarily used to move the mixture, ensuring thorough mixing and reaction, and to clean the inner wall of the kettle 1. The power assembly 33 primarily provides power for the movement of the agitator shaft 31 and blade assembly 32.

[0033] Among them, the stirring shaft 31 vertically passes through the kettle cover 2, that is, the stirring shaft 31 is slidably connected to the kettle cover 2. One end of the stirring shaft 31 extends into the interior of the kettle body 1 and is connected to the blade assembly 32, and the other end of the stirring shaft 31 is connected to the power assembly 33. The power assembly 33 is arranged on the kettle body 1 and is used to drive the stirring shaft 31 to move in the vertical direction and drive the stirring shaft 31 to rotate. When in use, the power assembly 33 can drive the stirring shaft 31 to move in the vertical direction, and the power assembly 33 can also drive the stirring shaft 31 to rotate, that is, the stirring shaft 31 can rotate while moving in the vertical direction. Since the blade assembly 32 is connected to one end of the stirring shaft 31, the blade assembly 32 can also rotate while moving in the vertical direction. In this way, the blade assembly 32 can not only drive the mixture raw materials to mix in the circumferential direction, but also drive the mixture raw materials to mix in the vertical direction, thereby facilitating the full mixing of the mixture raw materials.

[0034] In addition, if Figure 5 and Figure 9 As shown, the blade assembly 32 includes a plurality of blade bodies 321, and the blade bodies 321 mainly function to drive the movement of the mixture raw materials. The plurality of blade bodies 321 are all fixedly connected to one end of the stirring shaft 31. An installation cavity 3211 is axially formed in the blade body 321 along the radial direction of the stirring shaft 31, and the end of the installation cavity 3211 far from the stirring shaft 31 is communicated with the space inside the kettle body 1. A connecting blade 322 is slidably connected in the installation cavity 3211. An elastic member 323 is provided between one end of the connecting blade 322 and the cavity bottom of the installation cavity 3211. The other end of the connecting blade 322 is fixedly connected with an arc-shaped scraping plate 324 that contacts the inner wall of the kettle body 1. The elastic member 323 can be a spring or other suitable components.

[0035] In the initial state, one side wall of the arc-shaped scraping plate 324 contacts the cylindrical inner wall on the upper side of the kettle body 1. When the arc-shaped scraping plate 324 moves to the hemispherical structure position at the bottom of the kettle body 1 under the drive of the stirring shaft 31, at this time, due to the gradually decreasing radius of the bottom of the kettle body 1, the inner wall of the hemispherical structure on the lower side of the kettle body 1 will squeeze the arc-shaped scraping plate 324. At this time, the end of the arc-shaped pressing plate located in the installation cavity 3211 will compress the spring, so as to keep the arc-shaped scraping plate 324 in contact with the inner wall of the hemispherical structure on the lower side of the kettle body 1, and thus the inner wall of the kettle body 1 can be cleaned more comprehensively.

[0036] In addition, as Figures 1-4 shown, the power assembly 33 includes an installation frame 331 with a U-shaped structure facing the kettle body 1. The installation frame 331 includes two parallel side arms. One end of the installation frame 331 is fixedly connected to the outer wall of the kettle body 1. A lead screw 332 with a vertical axis direction is rotatably connected between the two side arms of the installation frame 331. One end of the lead screw 332 passes through the installation frame 331 and is fixedly connected to a first motor 333. The first motor 333 is fixedly connected to the bottom of the installation frame 331, which is convenient for installing the first motor 333 and can reduce the center of gravity of the whole device, making the device more stable during use. A nut seat 334 is threadedly connected to the lead screw 332. A connecting rod 335 is fixedly connected to the nut seat 334. The free end of the connecting rod 335 is fixedly connected to a machine frame 336. A second motor 337 is fixedly connected to the machine frame 336. The output end of the second motor 337 is fixedly connected to a speed reducer 338. The output end of the speed reducer 338 is fixedly connected to the other end of the stirring shaft 31.

[0037] During use, the raw material mixture is first fed into the kettle body 1 through the feed hole on the kettle cover 2. Then, the first motor 333 and the second motor 337 are simultaneously activated. The second motor 337, via the reducer 338 and the stirring shaft 31, directly drives the blade assembly 32 to rotate, thereby circumferentially mixing the raw material mixture within the kettle body 1. The rotation of the first motor 333 drives the screw 332 to rotate, which in turn drives the nut holder 334 to move axially along the screw 332. The movement of the nut holder 334, through the connecting rod 335 and the frame 336, drives the second motor 337 in a vertical direction. This, in turn, drives the blade assembly 32 to rotate and move vertically, thereby axially mixing the raw material mixture. As the curved scraper 324 in the blade assembly 32 moves vertically, it cleans the inner wall of the kettle body 1, thereby reducing the adhesion of the raw material mixture and the prepared silica to the inner wall of the kettle body 1. Of course, the start timings of the first motor 333 and the second motor 337 may also be selected separately according to actual working conditions, which makes the use more flexible.

[0038] Further, if Figure 1 As shown, the mounting frame 331 is provided with a guide hole 3311 along the axial direction of the screw rod 332, and a guide rod 3341 is fixedly connected to the nut seat 334, which is slidably connected to the guide hole 3311. The guide hole 3311 and the guide rod 3341 both serve as guides and limiters. The sliding connection between the guide rod 3341 and the guide hole 3311 prevents the nut seat 334 from rotating with the screw rod 332, thereby making the vertical movement of the nut seat 334 more stable. This in turn makes the vertical movement of the blade assembly 32 more stable, allowing for better mixing of the mixture and cleaning of the inner wall of the kettle body 1.

[0039] As an optional embodiment, Figure 9 As shown, the number of blade bodies 321 is 2-4, and the multiple blade bodies 321 are distributed in a circular array about the axis of the stirring shaft 31. Among them, the number of blade bodies 321 is greater than or equal to two, which can increase the contact area between the blade body 321 and the mixture raw material, thereby better driving the mixture raw material to mix. The number of blade bodies 321 is less than or equal to four, which can avoid the local turbulence that may offset each other due to too many blade bodies 321, affecting the efficiency of mixing the mixture raw materials. The multiple blade bodies 321 are distributed in a circular array about the axis of the stirring shaft 31, which can make the distribution of the blade bodies 321 more comprehensive, thereby better mixing the mixture raw materials.

[0040] In addition, if Figure 6As shown, in the vertical direction, the top and bottom of the curved scraper 324 are both provided with first chamfers 3241, and the first chamfers 3241 are inclined from the edge of the curved scraper 324 toward the center of the curved scraper 324. The provision of the first chamfers 3241 facilitates the removal of debris from the inner wall of the kettle body 1 and reduces the adhesion of the removed debris to the curved scraper 324. When the curved scraper 324 moves upward in the vertical direction, the upper first chamfer 3241 conforms to the inner wall of the kettle body 1 to clean the debris adhered thereto. The cleaned debris falls along the surface of the first chamfer 3241 to the bottom of the kettle body 1. When the curved scraper 324 moves downward in the vertical direction, the lower first chamfer 3241 conforms to the inner wall of the kettle body 1 to clean the debris adhered thereto. The cleaned debris falls directly to the bottom of the kettle body 1.

[0041] Further, if Figure 6 As shown, horizontally, both sides of the curved scraper 324 are provided with second chamfers 3242, and the direction of the second chamfers 3242 is inclined from the edge of the curved scraper 324 toward the center of the curved scraper 324. The second chamfers 3242 are primarily used to remove debris adhering to the inner wall of the kettle body 1. When the first motor 333 and the second motor 337 are activated simultaneously, the curved scraper 324 ascends and descends in a spiral within the kettle body 1, i.e., the curved scraper 324 moves both horizontally and vertically. Therefore, the second chamfers 3242 can horizontally remove debris adhering to the inner wall of the kettle body 1.

[0042] As an optional embodiment, the circular angle corresponding to the curved scraper 324 ranges from 5° to 30°. In other words, the central angle corresponding to the curved scraper 324 is preferably between 5° and 30°. A central angle greater than 5° maximizes the contact area between the curved scraper 324 and the inner wall of the kettle body 1, thereby accelerating the cleaning of debris attached to the inner wall of the kettle body 1. A central angle less than 30° minimizes interference between the curved scraper 324 and the bottom of the kettle body 1, as the radius of the bottom of the kettle body 1 gradually decreases. This allows the curved scraper 324 to better clean debris attached to the bottom of the kettle body 1.

[0043] In addition, if Figure 5As shown, in the radial direction of the stirring shaft 31, the cross-sectional shape of the blade body 321 is a cross-shaped structure with a circular center and semi-elliptical structures on both sides. In other words, in the radial direction of the stirring shaft 31, the blade body 321 is composed of three parts. This increases the contact area between the blade body 321 and the raw material mixture, facilitating mixing of the raw material mixture. In addition, the outer surface of the blade body 321 has an arc-shaped structure, which reduces the resistance between the blade body 321 and the raw material mixture and reduces the adhesion of the raw material mixture and the prepared silica to the blade body 321.

[0044] Similarly, in the radial direction of the stirring shaft 31, the cross-sectional shape of the connecting blade 322 is also a cross-shaped structure with a circular ring in the middle and semi-elliptical structures on both sides. In other words, in the radial direction of the stirring shaft 31, the connecting blade 322 is also composed of three parts. This can increase the contact area between the connecting blade 322 and the mixture raw material, which is beneficial for mixing the mixture raw material. In addition, the outer surface of the connecting blade 322 has an arc-shaped structure, which can reduce the resistance between the connecting blade 322 and the mixture raw material and reduce the adhesion of the mixture raw material and the prepared silica to the connecting blade 322. It can also be adapted to the shape of the blade body 321.

[0045] In addition, if Figure 4 and Figure 7 As shown, the inner top of the kettle cover 2 is fixedly connected to an electromagnet 4 with an external gold plating. It should be noted that the gold plating on the outside of the electromagnet 4 is mainly to reduce the corrosion and influence of the mixture raw materials on the electromagnet 4. The thickness of the gold plating can be set according to the actual working conditions, mainly so as not to affect the magnetism of the electromagnet 4. The electromagnet 4 is selectively magnetically connected to the scraper assembly 5, that is, when the electromagnet 4 is energized, the electromagnet 4 can be magnetically connected to the scraper assembly 5, and the scraper assembly 5 is initially located on the upper side of the kettle body 1. When the electromagnet 4 is powered off, the scraper assembly 5 will move downward under the action of gravity, so that the inner wall of the kettle body 1 can be cleaned. It should be noted that the reaction of the mixture raw materials is carried out below the initial position of the scraper assembly 5, and the scraper assembly 5 will not interfere with the reaction and mixing of the mixture raw materials.

[0046] Specifically, if Figure 4 and Figure 7As shown, the scraper assembly 5 includes an annular scraper 51 in contact with the inner wall of the kettle body 1, a support rod 52 and a gold-plated iron connecting seat 53. The connecting seat 53 is arranged inside the annular scraper 51 and is concentric with the annular scraper 51. The gold plating on the outside of the connecting seat 53 is mainly to reduce the corrosion and influence of the mixed raw materials on the connecting seat 53. The thickness of the gold plating can be set according to the actual working conditions, mainly so as not to affect the magnetism of the connecting seat 53. The two ends of the support rod 52 are fixedly connected to the annular scraper 51 and the connecting seat 53 respectively. A plurality of support rods 52 can be provided, so that the connection between the annular scraper 51 and the connecting seat 53 can be more stable. The electromagnet 4 is selectively magnetically connected to the connecting seat 53. During use, after the silica is prepared and discharged from the discharge port, the electromagnet 4 is de-energized. After this de-energization, the scraper assembly 5 moves downward under the action of gravity, wherein the annular scraper 51 descends along the inner wall of the kettle body 1, thereby scraping off any debris adhering to the inner wall of the kettle body 1 and dropping it to the bottom of the kettle body 1, facilitating the discharge of the cleaned material. When cleaning is complete, the power assembly 33 is activated to move the blade assembly 32 upward. During this upward movement, the blade assembly 32 drives the scraper assembly 5 upward. When the scraper assembly 5 moves close to the electromagnet 4, the electromagnet 4 is energized, causing the scraper assembly 5 to be attracted by the attraction of the electromagnet 4, thereby facilitating the next round of mixing of the raw materials.

[0047] As an optional embodiment, Figure 2 、 Figure 7 and Figure 10 As shown, a flow channel 311 is provided inside the stirring shaft 31 along its axial direction, wherein the flow channel 311 mainly serves as a drainage. A water inlet 312 connected to the flow channel 311 is provided on the side of the stirring shaft 31 close to the reducer 338. It should be noted that the water inlet 312 is arranged on the side close to the reducer 338 so as to reduce the interference between the water inlet 312 and the mixture raw material. The water inlet 312 can be connected to an external water source. It should be noted that the water inlet 312 is connected to the external water source after the preparation of silica is completed. A plurality of water outlets 313 connected to the flow channel 311 are provided on the end of the stirring shaft 31 away from the reducer 338, and the direction of the water outlet 313 is toward the inner wall of the kettle body 1. A one-way valve is fixedly installed at the water outlet 313, and the conduction direction of the one-way valve is from the flow channel 311 to the outside.

[0048] It should be noted that the water outlet 313 is oriented toward the cylindrical inner wall of the kettle body 1. Specifically, the water outlet 313 can be oriented toward the inner wall of the upper cylindrical structure of the kettle body 1. Due to the size limitations of the blade assembly 32, the curved scraper 324 in the blade assembly 32 cannot completely clean the inner wall of the hemispherical structure on the lower side of the kettle body 1. In this case, the inner wall of the upper cylindrical structure can be cleaned by spraying water. The cleaned water will flow into the curved bottom of the lower side of the kettle body 1 under the action of gravity, thereby cleaning the curved bottom of the lower side of the kettle body 1. The one-way valve is provided to prevent the mixed raw materials or prepared silica from entering the flow channel 311.

[0049] The above describes the embodiments of this embodiment, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A high-pressure reaction vessel for preparing a silica catalyst, comprising: A kettle body (1) and a kettle lid (2), and it is characterized in that the high-pressure reaction vessel further comprises: A mixing and cleaning component (3), which comprises: a stirring shaft (31), a blade component (32) and a power component (33). The stirring shaft (31) vertically penetrates through the kettle lid (2), one end of which extends into the interior of the kettle body (1) and is connected to the blade component (32), and the other end of which is connected to the power component (33). The power component (33) is arranged on the kettle body (1) and is used for driving the stirring shaft (31) to move in the vertical direction and driving the stirring shaft (31) to rotate; The blade component (32) comprises: a plurality of blade bodies (321). The plurality of blade bodies (321) are all connected to one end of the stirring shaft (31). An installation cavity (3211) is axially formed in the blade body (321) along the radial direction of the stirring shaft (31). A connecting blade (322) is slidably connected in the installation cavity (3211). An elastic member (323) is arranged between one end of the connecting blade (322) and the cavity bottom of the installation cavity (3211). The other end of the connecting blade (322) is provided with an arc-shaped scraping plate (324) that contacts the inner wall of the kettle body (1).

2. A high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that: The power component (33) comprises: a mounting frame (331) with a U-shaped structure whose opening faces the kettle body (1). One end of the mounting frame (331) is connected to the kettle body (1). A lead screw (332) with an axial direction in the vertical direction is rotatably connected between the two side arms of the mounting frame (331). One end of the lead screw (332) penetrates through the mounting frame (331) and is fixedly connected to a first motor (333). A nut seat (334) is threadedly connected to the lead screw (332). A connecting rod (335) is fixedly connected to the nut seat (334). The free end of the connecting rod (335) is fixedly connected to a machine frame (336). A second motor (337) is fixedly connected to the machine frame (336). The output end of the second motor (337) is fixedly connected to a speed reducer (338). The output end of the speed reducer (338) is fixedly connected to the other end of the stirring shaft (31).

3. A high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 2, characterized in that: The mounting frame (331) is axially provided with a guiding hole (3311) along the lead screw (332). A guiding rod (3341) is fixedly connected to the nut seat (334). The guiding rod (3341) is slidably connected to the guiding hole (3311).

4. A high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that:

5. The high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that: The number of the blade bodies (321) is 2 - 4, and the plurality of blade bodies (321) are annularly arrayed about the axis of the stirring shaft (31).

6. A high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that: Vertically, first chamfers (3241) are arranged at both the top and the bottom of the arc-shaped scraping plate (324), and the directions of the first chamfers (3241) are both inclined from the edge of the arc-shaped scraping plate (324) towards the middle of the arc-shaped scraping plate (324). Horizontally, second chamfers (3242) are arranged on both sides of the arc-shaped scraping plate (324), and the directions of the second chamfers (3242) are both inclined from the edge of the arc-shaped scraping plate (324) towards the middle of the arc-shaped scraping plate (324).

7. A high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that: The circular angle corresponding to the arc-shaped scraper (324) is in the range of 5°-30°.

8. The high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that: In the radial direction of the stirring shaft (31), the cross-sectional shape of the blade body (321) is a cross-shaped structure with a circular ring in the middle and semi-elliptical structures on both sides; In the radial direction of the stirring shaft (31), the cross-sectional shape of the connecting blade (322) is also a cross-shaped structure with a circular ring in the middle and semi-elliptical structures on both sides.

9. The high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 1, characterized in that: The inner top of the kettle cover (2) is fixedly connected to an electromagnet (4) with an external gold plating, and the electromagnet (4) is selectively magnetically connected to a scraper assembly (5), and the scraper assembly (5) comprises: an annular scraper (51) in contact with the inner wall of the kettle body (1), a support rod (52) and a gold-plated iron connecting seat (53), the two ends of the support rod (52) are respectively fixedly connected to the annular scraper (51) and the connecting seat (53), and the electromagnet (4) is selectively magnetically connected to the connecting seat (53).

10. The high-pressure reaction vessel for preparing a silicon dioxide catalyst according to claim 2, characterized in that: A flow channel (311) is provided inside the stirring shaft (31) along its axial direction. A water inlet (312) communicating with the flow channel (311) is provided on a side of the stirring shaft (31) close to the reducer (338). A plurality of water outlet holes (313) communicating with the flow channel (311) are provided on an end of the stirring shaft (311) away from the reducer (338). The water outlet holes (313) are oriented toward the cylindrical inner wall of the kettle body (1). A one-way valve is provided at the water outlet hole (313). The conduction direction of the one-way valve is from the flow channel (311) to the outside.

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