Reaction kettle for preparing quartz sand by hydrolyzing TEOS (tetraethyl orthosilicate)

Abstract

The invention relates to a reaction kettle for preparing quartz sand by hydrolyzing TEOS (tetraethyl orthosilicate), which relates to the field of quartz sand preparation, and comprises a reaction kettle body, a stirring device, a heating device, a feed port and a discharge port, the reaction kettle body is of a double-layer structure and comprises an outer barrel and an inner barrel, the heating device is arranged between the outer barrel and the inner barrel, a feeding port is formed in the upper portion of the reaction kettle body, and a discharging port is formed in the lower portion of the reaction kettle body. The stirring device comprises a driving motor and a stirring shaft; the driving motor is mounted at the upper part of the reaction kettle body and drives the stirring shaft to rotate, and the stirring shaft is positioned in the inner barrel; the heating device comprises a heating ring frame and an electric heating pipe, the heating ring frame is rotatably mounted on the outer side of the inner barrel, the heating ring frame is connected with the stirring shaft through a transmission mechanism, and the electric heating pipe is mounted on the heating ring frame; when the driving motor drives the stirring shaft to rotate, the transmission mechanism drives the heating ring frame to rotate, so that the phenomenon that the inner barrel is heated unevenly due to fixed-point heating of the electric heating pipe is avoided.

Description

Technical Field

[0001] The invention relates to the field of quartz sand preparation, and in particular to a reaction kettle for preparing quartz sand by hydrolyzing TEOS. Background Art

[0002] Quartz sand is an important inorganic non-metallic material, widely used in optics, electronics, building materials and other fields; the traditional method of preparing quartz sand mainly relies on high-purity quartz ore. With the increasing depletion of quartz ore resources, it is urgent to find a new preparation method; the commonly used preparation methods currently have defects such as low product purity and high energy consumption, which are difficult to meet the strict requirements of high-end application fields for the purity of quartz sand; Preparation of quartz sand by hydrolysis of tetraethyl orthosilicate (TEOS) is an emerging synthesis method, the principle of which is to utilize TEOS to react with water to generate SiO2 and ethanol, and then obtain high-purity quartz sand through aging, drying, grinding, calcination and other steps; this method does not rely on quartz mineral resources, the raw materials are easy to obtain, the process route is clean and environmentally friendly, the product purity is high, and it can meet the high purity requirements of raw material quartz sand for pan-semiconductors, photovoltaics, quartz parts, etc.; the existing reactor for preparing quartz sand by hydrolysis of TEOS heats the reaction tank through an electric heating tube, and the electric heating tube cannot ensure completely uniform distribution on the outside of the reaction tank, which can easily cause uneven heating of the reaction tank during the heating process, affecting the reaction quality of the product. Summary of the invention

[0003] The present invention aims to overcome the problem that the existing reactor for preparing quartz sand by hydrolyzing TEOS heats the reaction liner by electric auxiliary heating, and the electric heating wire cannot be guaranteed to be completely evenly distributed outside the reaction liner, which easily causes uneven heating of the reaction liner during the heating process. The purpose of the present invention is to provide a reactor for preparing quartz sand by hydrolyzing TEOS.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: A reactor for preparing quartz sand by hydrolyzing TEOS, comprising: a reactor body, a stirring device, a heating device, a feed inlet, and a discharge port; The reactor body is a double-layer structure, which includes an outer cylinder and an inner cylinder. The heating device is arranged between the outer cylinder and the inner cylinder. The upper part of the reactor body is provided with a feed inlet, and the lower part is provided with a discharge port. The stirring device comprises a driving motor and a stirring shaft; the driving motor is installed on the upper part of the reaction kettle body, the driving motor drives the stirring shaft to rotate, and the stirring shaft is located inside the inner cylinder; The heating device comprises a heating ring frame and an electric heating tube. The heating ring frame is rotatably mounted on the outside of the inner cylinder. The heating ring frame is connected to the stirring shaft through a transmission mechanism. The electric heating tube is mounted on the heating ring frame. The transmission mechanism comprises a bevel gear set, a transmission shaft, and a transmission gear ring. The stirring shaft and the transmission shaft are driven by the bevel gear set. The transmission shaft is connected to the transmission gear ring through a gear. The transmission gear ring is installed on the heating ring frame.

[0005] Furthermore, the transmission mechanism also includes a transmission frame and a driving shaft. The transmission frame is fixedly mounted on the upper part of the inner cylinder, and the driving shaft is coaxially rotatably mounted on the transmission frame with the transmission shaft. The bevel gear set includes a first bevel gear, a second bevel gear, and a third bevel gear. The first bevel gear is mounted on the driving shaft, and the second bevel gear is mounted on the transmission shaft. The stirring shaft is rotatably mounted on the transmission frame, and the third bevel gear is mounted on the stirring shaft. The third bevel gear is between the first bevel gear and the second bevel gear, and meshes with the first bevel gear and the second bevel gear. The driving shaft is connected to the output shaft of the driving motor by gear meshing.

[0006] Furthermore, a support tube is installed in the reactor body, the interior of the support tube is hollow, the lower end of the support tube is provided with an air guide hole, the upper end of the support tube is connected to the exhaust pipe through a pipeline, the exhaust pipe is provided with an exhaust valve, and a sealing plug is provided between the outer side of the support tube and the inner wall of the inner cylinder body. The sealing plug divides the inner cylinder body into two cavities, the upper part is a retention cavity, and the lower part is a reaction cavity. The air guide hole is located in the reaction cavity, and a ventilation pipe is provided on the upper part of the retention cavity.

[0007] Furthermore, a stirring sub-shaft is rotatably installed on the stirring shaft, and the stirring sub-shaft is coaxially arranged with the stirring shaft. The upper end of the stirring sub-shaft is rotatably installed on the transmission frame, and a fourth bevel gear is installed on the stirring sub-shaft. The fourth bevel gear meshes with the first bevel gear and the second bevel gear. The lower end of the stirring sub-shaft passes through the stirring shaft, and stirring blades are respectively provided at the lower part of the stirring shaft and the lower part of the stirring sub-shaft.

[0008] Furthermore, a first connecting frame is slidably provided on the stirring shaft, the first connecting frame is rotatably connected to the sealing plug, a second connecting frame is provided on the stirring sub-shaft, the second connecting frame is rotatably connected to the first connecting frame, a first receiving plate is provided on the first connecting frame, the first receiving plate is located at the lower part of the stirring shaft, and a second connecting frame is provided on the second receiving plate, the second receiving plate is located at the lower part of the stirring sub-shaft.

[0009] Furthermore, a positioning shaft is installed at the bottom of the inner cylinder, and the positioning shaft is rotatably inserted into the stirring auxiliary shaft.

[0010] Furthermore, a reciprocating screw is installed on the stirring blade, a scraper is provided on the moving part of the reciprocating screw, the scraper contacts the outer side of the stirring blade, a one-way ratchet is installed at one end of the reciprocating screw, the outer ring of the one-way ratchet is provided with a linkage gear ring, support slides are respectively installed inside the stirring sub-shaft and the stirring shaft, a linkage rack is slidably installed on the support slide, the linkage rack meshes with the linkage gear ring, the stirring sub-shaft and the positioning shaft are respectively provided with linkage mechanisms, the linkage mechanism on the stirring sub-shaft drives the linkage rack on the stirring shaft to reciprocate, and the linkage mechanism on the positioning shaft drives the linkage rack on the stirring sub-shaft to reciprocate.

[0011] Furthermore, the linkage mechanism includes a central shaft, a first connecting plate, a second connecting plate, a deflection shaft, a deflection ring, and a pressure rod. The first connecting plate and the second connecting plate are fixedly mounted on the central shaft, the deflection shaft is rotatably mounted on the central shaft, both ends of the deflection shaft are connected to the deflection ring, the outer ring of the deflection ring is provided with a guide ring groove, the linkage rack is provided with a connecting block, the connecting block is located in the guide ring groove, a pressure rod is slidably mounted on the second connecting plate, the upper end of the pressure rod is hinged to the side of the deflection ring, a universal wheel is installed at the lower end of the pressure rod, an extrusion spring is provided between the universal wheel and the second connecting plate, the universal wheel in the linkage mechanism on the stirring sub-shaft contacts the first receiving plate, and the universal wheel in the linkage mechanism on the positioning shaft contacts the second receiving plate.

[0012] Furthermore, the stirring shaft, the stirring sub-shaft, the positioning shaft, the first connecting plate, and the second connecting plate are all coaxially arranged.

[0013] The beneficial effects of the present invention are: The driving motor in the stirring device is used to drive the stirring shaft to rotate. While the reactants in the reactor are stirred and mixed, the heating ring frame is driven to rotate through the transmission mechanism, and the heating ring frame is used to drive the electric heating tube to rotate around the inner cylinder, thereby avoiding the phenomenon of uneven heating of the inner cylinder due to fixed-point heating of the electric heating tube; The driving motor drives the driving shaft to rotate, and the driving shaft drives the third bevel gear and the fourth bevel gear to rotate in opposite directions respectively through the first bevel gear, thereby causing the stirring shaft connected to the third bevel gear and the stirring sub-shaft connected to the fourth bevel gear to rotate coaxially in opposite directions. Due to the reverse rotation of the stirring sub-shaft and the stirring shaft, the stirring blades are driven to move inside the inner cylinder, which is beneficial to promoting the mixing of the upper and lower layers of reactants in the inner cylinder; The up and down movement of the sealing plug drives the deflection ring in the linkage mechanism on the stirring sub-shaft and the positioning shaft to deflect. The rotation rate of the reciprocating screw is adjusted according to the moving distance of the sealing plug. As the reaction ethanol gas evaporates, the moving speed of the scraper on the stirring blade is changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic cross-sectional view of a reaction kettle body of the present invention; Figure 2 It is a schematic diagram of the transmission mechanism structure of the present invention; Figure 3 This is a schematic diagram of the installation of the sealing plug of the present invention; Figure 4 It is a schematic diagram of the installation of the first connecting frame and the second connecting frame of the present invention; Figure 5 It is a schematic diagram of the linkage mechanism structure of the present invention; Figure 6 The linkage mechanism of the present invention is arranged at the stirring shaft and the stirring auxiliary shaft, and the structural schematic diagram; Figure 7 The linkage mechanism of the present invention is arranged at the stirring shaft and the stirring auxiliary shaft, and the schematic diagram of the connection between the connecting block and the deflection ring; Figure 8 The linkage mechanism of the present invention is arranged at the stirring auxiliary shaft and the positioning shaft, and the structural schematic diagram; Fig. 9 The linkage mechanism of the present invention is arranged at the stirring secondary shaft and the positioning shaft, and the schematic diagram of the connection between the connecting block and the deflection ring; In the figure: 1, reactor body; 2, stirring device; 3, heating device; 4, feed port; 5, discharge port; 12, outer cylinder; 13, inner cylinder; 14, drive motor; 15, stirring shaft; 16, heating ring frame; 17, electric heating tube; 18, transmission mechanism; 21, transmission frame; 22, driving shaft; 23, transmission shaft; 24, transmission gear ring; 25, first bevel gear; 26, second bevel gear; 27, third bevel gear; 28, stirring sub-shaft; 29, fourth bevel gear; 30, stirring blade; 41, support cylinder; 42, air guide hole; 43, exhaust pipe; 44 , exhaust valve; 45, sealing plug; 46, ventilation pipe; 47, first connecting frame; 48, second connecting frame; 49, first receiving plate; 50, second receiving plate; 51, positioning shaft; 61, reciprocating screw; 62, scraper; 63, one-way ratchet; 64, linkage gear ring; 65, supporting slide; 66, linkage rack; 67, linkage mechanism; 68, central axis; 69, first connecting plate; 70, second connecting plate; 71, deflection shaft; 72, deflection ring; 73, pressure rod; 74, guide ring groove; 75, connecting block; 76, universal wheel; 77, extrusion spring. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0016] Example 1

[0017] like Figure 1As shown, a reactor for preparing quartz sand by hydrolyzing TEOS comprises: a reactor body 1, a stirring device 2, a heating device 3, a feed port 4, and a discharge port 5; The reactor body 1 is a double-layer structure, which includes an outer cylinder 12 and an inner cylinder 13. The heating device 3 is arranged between the outer cylinder 12 and the inner cylinder 13. The upper part of the reactor body 1 is provided with a feed inlet 4, and the lower part is provided with a discharge port 5. The stirring device 2 includes a driving motor 14 and a stirring shaft 15; the driving motor 14 is installed on the upper part of the reaction kettle body 1, and the driving motor 14 drives the stirring shaft 15 to rotate, and the stirring shaft 15 is located inside the inner cylinder 13; The heating device 3 includes a heating ring frame 16 and an electric heating tube 17. The heating ring frame 16 is rotatably mounted on the outer side of the inner cylinder 13. The heating ring frame 16 is connected to the stirring shaft 15 through a transmission mechanism 18. The electric heating tube 17 is mounted on the heating ring frame 16. The transmission mechanism 18 includes a bevel gear set, a transmission shaft 23, and a transmission gear ring 24. The stirring shaft 15 and the transmission shaft 23 are driven by the bevel gear set. The transmission shaft 23 is connected to the transmission gear ring 24 through a gear. The transmission gear ring 24 is installed on the heating ring frame 16. The driving motor 14 in the stirring device 2 is used to drive the stirring shaft 15 to rotate. The stirring shaft 15 drives the transmission shaft 23 to rotate through the bevel gear set. The rotation of the transmission shaft 23 drives the transmission gear ring 24 to rotate, thereby driving the heating ring frame 16 to rotate around the inner cylinder 13. While completing the stirring and mixing of the reactants in the reactor body 1, the heating ring frame 16 is driven to rotate through the transmission mechanism 18, and the heating ring frame 16 drives the electric heating tube 17 to rotate around the inner cylinder 13, thereby avoiding the fixed-point heating of the electric heating tube 17, which causes the inner cylinder 13 to be heated unevenly.

[0018] Example 2

[0019] On the basis of Example 1, Figure 1-3 As shown, the transmission mechanism 18 also includes a transmission frame 21 and a drive shaft 22. The transmission frame 21 is fixedly mounted on the upper part of the inner cylinder 13. The drive shaft 22 is coaxially rotatably mounted on the transmission frame 21 with the transmission shaft 23. The bevel gear set includes a first bevel gear 25, a second bevel gear 26, and a third bevel gear 27. The first bevel gear 25 is mounted on the drive shaft 22, and the second bevel gear 26 is mounted on the transmission shaft 23. The stirring shaft 15 is rotatably mounted on the transmission frame 21, and the third bevel gear 27 is mounted on the stirring shaft 15. The third bevel gear 27 is between the first bevel gear 25 and the second bevel gear 26, and meshes with the first bevel gear 25 and the second bevel gear 26. The drive shaft 22 is connected to the output shaft of the drive motor 14 by gear meshing. A stirring sub-shaft 28 is rotatably mounted on the stirring shaft 15. The stirring sub-shaft 28 is coaxially arranged with the stirring shaft 15. The upper end of the stirring sub-shaft 28 is rotatably mounted on the transmission frame 21. A fourth bevel gear 29 is mounted on the stirring sub-shaft 28. The fourth bevel gear 29 meshes with the first bevel gear 25 and the second bevel gear 26. The lower end of the stirring sub-shaft 28 passes through the stirring shaft 15. Stirring blades 30 are respectively provided at the lower part of the stirring shaft 15 and the lower part of the stirring sub-shaft 28. The driving motor drives the driving shaft 22 to rotate, and the driving shaft 22 drives the third bevel gear 27 and the fourth bevel gear 29 to rotate in opposite directions respectively through the first bevel gear 25, so that the stirring shaft 15 connected to the third bevel gear 27 and the stirring sub-shaft 28 connected to the fourth bevel gear 29 produce the phenomenon of coaxial reverse rotation. Due to the reverse rotation of the stirring sub-shaft 28 and the stirring shaft 15, the stirring blade 30 is driven to move inside the inner cylinder 13, which is beneficial to promote the mixing of the upper and lower layers of reactants in the inner cylinder 13 and improve the reaction effect; the symmetrical layout structure formed by the first bevel gear 25, the second bevel gear 26, the third bevel gear 27 and the fourth bevel gear 29 enables the load borne by each gear to be evenly distributed, avoiding the instability caused by the load concentrated on one or several gears.

[0020] Example 3

[0021] On the basis of Example 1, Figure 1-3 As shown, a support cylinder 41 is installed in the reactor body 1, and the interior of the support cylinder 41 is hollow. An air guide hole 42 is provided at the lower end of the support cylinder 41, and an exhaust pipe 43 is connected to the upper end of the support cylinder 41 through a pipeline. An exhaust valve 44 is provided on the exhaust pipe 43. A sealing plug 45 is provided between the outer side of the support cylinder 41 and the inner side wall of the inner cylinder body 13. The sealing plug 45 divides the inner cylinder body 13 into two cavities, the upper part is a retention cavity, and the lower part is a reaction cavity. The air guide hole 42 is located in the reaction cavity, and a ventilation pipe 46 is provided at the upper part of the retention cavity. A valve is provided on the ventilation pipe 46. When the reactor body 1 is charged, the valve on the ventilation pipe 46 and the exhaust valve 44 on the exhaust pipe 43 are opened. At this time, the air pressure in the retention cavity and the reaction cavity in the inner cylinder 13 are connected to the outside. The sealing plug 45 in the inner cylinder 13 moves downward to the lower part of the support cylinder 41 under the action of gravity. The raw materials to be reacted are added to the reactor body 1 through the feed port 4. The reaction raw materials are introduced into the reaction chamber through the conduit at the feed port 4. After the charging is completed, the exhaust valve 44 on the exhaust pipe 43 is closed, and the driving motor 14 is turned on to drive the stirring shaft 15 and the heating ring frame 16 to rotate. The heating ring frame 1 The electric heating tube 17 on 6 heats the inner cylinder 13, and the reaction raw materials react in the reaction chamber. In the first stage of the reaction, TEOS undergoes reversible hydrolysis under the heating environment and the action of the catalyst to produce silanol (Si-OH) and ethanol. In the heating environment, ethanol volatilizes to form a gas mixed with ethanol and steam. As the gas is generated, the pressure in the reaction chamber increases. The pressure will push the sealing plug 45 to move upward to maintain the gas pressure in the reaction chamber stable, and the ethanol gas generated by the reaction is retained in the reaction chamber. In the reversible reaction of TEOS hydrolysis, it is easy to control the rate of TEOS hydrolysis; Example 4

[0022] On the basis of Example 3, as the ethanol gas evaporates, more silanol (Si-OH) is produced in the reaction solution, and thus the reaction enters the second stage. The silanol (Si-OH) is unstable and undergoes polycondensation, and eventually forms silicon dioxide and water. In this stage, silicon dioxide powder particles are produced in the solution, and the precipitated powder particles adhere to the stirring blade 30, thereby increasing the load of the stirring blade 30. Long-term accumulation can easily cause the stirring blade 30 to break. Therefore, in order to solve the above problem, as Figure 4-9 As shown, a first connecting frame 47 is slidably provided on the stirring shaft 15, the first connecting frame 47 is rotatably connected to the sealing plug 45, a second connecting frame 48 is provided on the stirring secondary shaft 28, the second connecting frame 48 is rotatably connected to the first connecting frame 47, a first receiving plate 49 is provided on the first connecting frame 47, the first receiving plate 49 is located at the lower part of the stirring shaft 15, and a second receiving plate 50 is provided on the second connecting frame 48, and the second receiving plate 50 is located at the lower part of the stirring secondary shaft 28; A positioning shaft 51 is installed at the bottom of the inner cylinder 13, and the positioning shaft 51 is rotated and inserted into the stirring auxiliary shaft 28; A reciprocating screw 61 is installed on the stirring blade 30, and a scraper 62 is provided on the moving part of the reciprocating screw 61, and the scraper 62 contacts the outer side of the stirring blade 30. A one-way ratchet 63 is installed at one end of the reciprocating screw 61, and a linkage gear ring 64 is provided on the outer ring of the one-way ratchet 63. Support slides 65 are respectively installed inside the stirring sub-shaft 28 and the stirring shaft 15, and a linkage rack 66 is slidably installed on the support slide 65. The linkage rack 66 meshes with the linkage gear ring 64. The stirring sub-shaft 28 and the positioning shaft 51 are respectively provided with a linkage mechanism 67. The linkage mechanism 67 on the stirring sub-shaft 28 drives the linkage rack 66 on the stirring shaft 15 to reciprocate, and the linkage mechanism 67 on the positioning shaft 51 drives the linkage rack 66 on the stirring sub-shaft 28 to reciprocate. The linkage mechanism 67 drives the linkage rack 66 to rotate, and the linkage rack 66 drives the linkage gear ring 64 to rotate, and cooperates with the one-way ratchet 63 to drive the reciprocating screw 61 to rotate in one direction. When the reciprocating screw 61 rotates, the moving part on it drives the scraper 62 to move along the surface of the stirring blade 30. When the scraper 62 moves, it can clean the silicon dioxide particles adsorbed on the surface of the stirring blade 30; The linkage mechanism 67 includes a central shaft 68, a first connecting plate 69, a second connecting plate 70, a deflection shaft 71, a deflection ring 72, and a pressure rod 73. The first connecting plate 69 and the second connecting plate 70 are fixedly mounted on the central shaft 68, the deflection shaft 71 is rotatably mounted on the central shaft 68, the two ends of the deflection shaft 71 are connected to the deflection ring 72, the outer ring of the deflection ring 72 is provided with a guide ring groove 74, the linkage rack 66 is provided with a connecting block 75, the connecting block 75 is located in the guide ring groove 74, the second connecting plate 70 is slidably mounted with a pressure rod 73, the upper end of the pressure rod 73 is hinged to the side of the deflection ring 72, the lower end of the pressure rod 73 is installed with a universal wheel 76, an extrusion spring 77 is provided between the universal wheel 76 and the second connecting plate 70, the universal wheel 76 in the linkage mechanism 67 on the stirring auxiliary shaft 28 contacts the first receiving plate 49, and the universal wheel 76 in the linkage mechanism 67 on the positioning shaft 51 contacts the second receiving plate 50; The surface formed by the radius line passing through the hinge point of the top pressure rod 73 on the deflection ring 72 and the axis of the top pressure rod 73 is perpendicular to the deflection axis 71; The stirring shaft 15, the stirring auxiliary shaft 28, the positioning shaft 51, the first connecting plate 69, and the second connecting plate 70 are all coaxially arranged; Before adding the reaction raw materials into the reaction chamber, the sealing plug 45 moves downward to the lower part of the support tube 41 under the action of gravity, and the sealing plug 45 drives the first connecting frame 47 and the second connecting frame 48 to move downward, thereby driving the first receiving plate 49 and the second receiving plate 50 to move downward. When the first receiving plate 49 and the second receiving plate 50 move to the bottom of their respective strokes, the universal wheel 76 contacted by the two will also move downward under the action of the extrusion spring 77, and the universal wheel 76 drives the push rod 73 to move downward, and the push rod 73 pulls the deflection ring 72 to deflect to a horizontal state; As the amount of ethanol gas volatilized in the reaction chamber increases, the sealing plug 45 is driven to move upward. When the sealing plug 45 moves upward, it drives the first connecting frame 47 and the second connecting frame 48 to move upward. The first connecting frame 47 drives the first receiving plate 49 to move upward, and the second connecting frame 48 drives the second receiving plate 50 to move upward. As the first receiving plate 49 and the second receiving plate 50 move upward, the first receiving plate 49 lifts the universal wheel 76 in the linkage mechanism 67 on the stirring sub-shaft 28 upward, and the second receiving plate 50 lifts the universal wheel 76 in the linkage mechanism 67 on the positioning shaft 51 upward, thereby driving the linkage mechanism 67 on the stirring sub-shaft 28 and the positioning shaft 51 to move; When the universal wheel 76 is subjected to an upward thrust, it pushes the push rod 73 to move upward, and as the push rod 73 moves upward, the deflection ring 72 is driven to rotate around the deflection shaft 71; When the linkage mechanism 67 is arranged on the stirring secondary shaft 28, as shown in FIG. Figure 6-7 As shown, the stirring sub-shaft 28 serves as the central shaft 68, and the first connecting plate 69, the second connecting plate 70 and the deflection shaft 71 are all arranged on the stirring sub-shaft 28. Since the stirring sub-shaft 28 and the stirring shaft 15 rotate in opposite directions, there is relative rotation between the stirring sub-shaft 28 and the stirring shaft 15, and the stirring shaft 15 drives the linkage rack 66 to move, and the connecting block 75 on the linkage rack 66 is restricted by the guide ring groove 74 of the outer ring of the deflection ring 72 and moves along the guide ring groove 74. When the deflection ring 72 deflects, the guide ring groove 74 pushes the connecting block 75 to move up and down within the deflection range of the deflection ring 72, thereby pushing the linkage rack 66 to reciprocate up and down, and when the deflection ring 72 does not deflect, the connecting block 75 is restricted by the guide ring groove 74 to move only on the same horizontal plane, and at this time the linkage rack 66 will remain stationary in the axial direction, and the linkage rack 66 will not generate up and down movement; When the linkage mechanism 67 is arranged on the positioning shaft 51, as shown in FIG. Figure 8-9 As shown, the positioning shaft 51 serves as the central shaft 68. At this time, the first connecting plate 69, the second connecting plate 70 and the deflection shaft 71 are all arranged on the stirring sub-shaft 28; the positioning shaft 51 is fixed to the bottom of the inner cylinder 13, and the stirring sub-shaft 28 can rotate, so that there is also relative rotation between the stirring sub-shaft 28 and the positioning shaft 51. When the stirring sub-shaft 28 rotates, the linkage rack 66 thereon is driven to move, and the connecting block 75 on the linkage rack 66 is restricted by the guide ring groove 74 of the outer ring of the deflection ring 72 on the positioning shaft 51. When the deflection ring 72 deflects, it will also drive the linkage rack 66 to reciprocate up and down. When the deflection ring 72 is horizontal, the linkage rack 66 on the stirring sub-shaft 28 will also be in a stationary state; Thus, the up and down movement of the sealing plug 45 drives the deflection ring 72 in the linkage mechanism 67 on the stirring auxiliary shaft 28 and the positioning shaft 51 to deflect. According to the movement distance of the sealing plug 45, the deflection angle of the deflection ring 72 is dynamically changed, thereby changing the reciprocating stroke of the linkage rack 66. When the rotation frequency of the stirring shaft 15 and the stirring auxiliary shaft 28 remains unchanged, the change in the reciprocating stroke of the linkage rack 66 can bring about a change in the rotation speed of the reciprocating screw 61. As the movement stroke of the linkage rack 66 increases, the rotation speed of the reciprocating screw 61 will also increase. In the first stage of the reaction, the amount of ethanol gas generated in this stage is small, so the floating distance of the sealing plug 45 is small, and the amount of silicon dioxide powder particles precipitated is small. Therefore, controlling the scraper 62 to move slowly on the stirring blade 30 can reduce the wear of the scraper 62 on the stirring blade 30. As the reaction enters the second stage, a large amount of ethanol gas evaporates, the amount of silicon dioxide powder particles precipitated increases, and the air pressure causes the sealing plug 45 to float a large distance. The floating of the sealing plug 45 accelerates the rotation speed of the reciprocating screw 61 on the stirring blade 30, thereby increasing the scraping rate of the scraper 62 on the surface of the stirring blade 30. The moving speed of the scraper 62 on the stirring blade 30 is adaptively correlated with the reaction stage. In the stage where less silicon dioxide powder particles are precipitated, the scraping frequency between the scraper 62 and the stirring blade 30 is reduced, the wear of the scraper 62 is reduced, and the service life of the scraper 62 is increased.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A reactor for preparing quartz sand by hydrolysis of TEOS, characterized in that: include: Reactor body, stirring device, heating device, feed inlet, and discharge port; The reactor body is a double-layer structure, which includes an outer cylinder and an inner cylinder. The heating device is arranged between the outer cylinder and the inner cylinder. The upper part of the reactor body is provided with a feed inlet, and the lower part is provided with a discharge outlet. The stirring device comprises a driving motor and a stirring shaft; the driving motor is installed on the upper part of the reaction kettle body, the driving motor drives the stirring shaft to rotate, and the stirring shaft is located inside the inner cylinder; The heating device comprises a heating ring frame and an electric heating tube. The heating ring frame is rotatably mounted on the outside of the inner cylinder. The heating ring frame is connected to the stirring shaft through a transmission mechanism. The electric heating tube is mounted on the heating ring frame. The transmission mechanism comprises a bevel gear set, a transmission shaft, and a transmission gear ring. The stirring shaft and the transmission shaft are driven by the bevel gear set. The transmission shaft is connected to the transmission gear ring through a gear. The transmission gear ring is installed on the heating ring frame.

2. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 1, characterized in that: The transmission mechanism also includes a transmission frame and a driving shaft. The transmission frame is fixedly mounted on the upper part of the inner cylinder. The driving shaft is coaxially rotatably mounted on the transmission frame with the transmission shaft. The bevel gear set includes a first bevel gear, a second bevel gear, and a third bevel gear. The first bevel gear is mounted on the driving shaft, and the second bevel gear is mounted on the transmission shaft. The stirring shaft is rotatably mounted on the transmission frame, and the third bevel gear is mounted on the stirring shaft. The third bevel gear is between the first bevel gear and the second bevel gear and meshes with the first bevel gear and the second bevel gear. The driving shaft is connected to the output shaft of the driving motor by gear meshing.

3. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 2, characterized in that: A support tube is installed in the reactor body, the interior of the support tube is hollow, the lower end of the support tube is provided with an air guide hole, the upper end of the support tube is connected to the exhaust pipe through a pipeline, the exhaust pipe is provided with an exhaust valve, a sealing plug is provided between the outer side of the support tube and the inner wall of the inner cylinder body, the sealing plug divides the inner cylinder body into two cavities, the upper part is a retention cavity, and the lower part is a reaction cavity, the air guide hole is located in the reaction cavity, and the upper part of the retention cavity is provided with a ventilation pipe.

4. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 3, characterized in that: A stirring sub-shaft is rotatably mounted on the stirring shaft, and the stirring sub-shaft is coaxially arranged with the stirring shaft. The upper end of the stirring sub-shaft is rotatably mounted on the transmission frame, and a fourth bevel gear is mounted on the stirring sub-shaft, and the fourth bevel gear meshes with the first bevel gear and the second bevel gear. The lower end of the stirring sub-shaft passes through the stirring shaft, and stirring blades are respectively provided at the lower part of the stirring shaft and the lower part of the stirring sub-shaft.

5. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 4, characterized in that: A first connecting frame is slidably provided on the stirring shaft, and the first connecting frame is rotatably connected to the sealing plug. A second connecting frame is provided on the stirring sub-shaft, and the second connecting frame is rotatably connected to the first connecting frame. A first receiving plate is provided on the first connecting frame, and the first receiving plate is located at the lower part of the stirring shaft. A second connecting frame is provided on the second receiving plate, and the second receiving plate is located at the lower part of the stirring sub-shaft.

6. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 5, characterized in that: A positioning shaft is installed at the bottom of the inner cylinder, and the positioning shaft is rotatably inserted into the stirring auxiliary shaft.

7. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 6, characterized in that: The stirring blade is provided with a reciprocating screw, and the moving part of the reciprocating screw is provided with a scraper, and the scraper contacts the outer side surface of the stirring blade. A one-way ratchet is provided at one end of the reciprocating screw, and the outer ring of the one-way ratchet is provided with a linkage gear ring. Support slides are respectively installed inside the stirring sub-shaft and the stirring shaft, and a linkage rack is slidably installed on the support slide, and the linkage rack meshes with the linkage gear ring. The stirring sub-shaft and the positioning shaft are respectively provided with linkage mechanisms, and the linkage mechanism on the stirring sub-shaft drives the linkage rack on the stirring shaft to reciprocate, and the linkage mechanism on the positioning shaft drives the linkage rack on the stirring sub-shaft to reciprocate.

8. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 7, characterized in that: The linkage mechanism includes a central shaft, a first connecting plate, a second connecting plate, a deflection shaft, a deflection ring, and a pressure rod. The first connecting plate and the second connecting plate are fixedly mounted on the central shaft, the deflection shaft is rotatably mounted on the central shaft, both ends of the deflection shaft are connected to the deflection ring, the outer ring of the deflection ring is provided with a guide ring groove, the linkage rack is provided with a connecting block, the connecting block is located in the guide ring groove, a pressure rod is slidably mounted on the second connecting plate, the upper end of the pressure rod is hinged to the side of the deflection ring, a universal wheel is installed at the lower end of the pressure rod, an extrusion spring is provided between the universal wheel and the second connecting plate, the universal wheel in the linkage mechanism on the stirring sub-shaft contacts the first receiving plate, and the universal wheel in the linkage mechanism on the positioning shaft contacts the second receiving plate.

9. The reactor for preparing quartz sand by hydrolyzing TEOS according to claim 8, characterized in that: The stirring shaft, the stirring sub-shaft, the positioning shaft, the first connecting plate and the second connecting plate are all coaxially arranged.

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