High-purity quartz sand microwave chlorination device
By designing a dispersing and stirring mechanism, the problems of uneven distribution of quartz sand and material blockage in the microwave chlorination device were solved, achieving uniform contact and full mixing of quartz sand and chlorine gas, thereby improving the efficiency of the chlorination reaction and the purity of the product.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG MEIBAO IND TECH CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
AI Technical Summary
The existing microwave chlorination equipment suffers from problems such as uneven distribution of quartz sand, material blockage, and insufficient mixing, which lead to incomplete reaction and affect product purity and purification efficiency.
The mixing mechanism and auxiliary feeding components work together with the stirring mechanism to disperse the quartz sand through a vibrating ring and a hard brush. Combined with the rotation of the stirring rod and stirring blades, this ensures that the quartz sand and chlorine gas are in uniform contact and fully mixed.
This process achieves uniform contact and thorough mixing of quartz sand and chlorine gas, improving the efficiency of the chlorination reaction and the purity of the product, preventing material agglomeration and feed blockage, and ensuring the continuity and stability of the reaction.
Smart Images
Figure CN224524738U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of chlorination equipment, specifically referring to a microwave chlorination device for high-purity quartz sand. Background Technology
[0002] In high-tech fields such as semiconductors, photovoltaics, and fiber optic communications, high-purity silica sand is a key basic material, and its purity directly affects device performance and product quality. Among them, semiconductor-grade silica sand has extremely stringent requirements for impurity content, and the advancement of purification processes has become a core factor restricting its application.
[0003] Current mainstream purification technologies, such as chlorination roasting, can remove some impurities, but they have insurmountable technical bottlenecks: First, the reaction needs to be carried out at high temperatures, which can easily cause quartz sand particles to fuse and form a solid solution, reducing not only the porosity of the material but also shrinking the contact interface between impurities and the reaction medium, significantly weakening the reactivity; Second, the removal effect is poor for impurities such as Al and Ti, which have a strong ability to combine with oxygen, making it difficult to meet the requirements for high-purity quartz sand; Third, the high-temperature reaction mode consumes a lot of energy and has a long process flow, resulting in low production efficiency and high costs.
[0004] Microwave chlorination technology, with its unique heating characteristics, offers a novel approach to the purification of high-purity quartz sand. This technology utilizes the selective heating effect of microwaves on polar components and impurity ions in the material, achieving rapid heating and concentrated energy utilization. Simultaneously, it significantly enhances the reactivity of chlorine with impurities, promoting the efficient removal of impurities by converting them into volatile substances or elemental metals. Furthermore, the thermal explosion effect generated by microwaves can break down the inclusion structure in the quartz sand, accelerating impurity migration and further improving the purification effect.
[0005] However, existing microwave chlorination devices still have structural defects in practical applications: during the feeding process, quartz sand raw materials are prone to agglomeration due to electrostatic adsorption or humidity, resulting in uneven distribution of materials in the reaction tank. This reduces the effective contact area with chlorine gas and prevents microwave energy from being evenly applied to each particle, causing incomplete local reactions. Traditional feeding structures often experience blockages due to material agglomeration, leading to material interruptions or fluctuations in the feeding rate, which seriously affects the continuity of the reaction. At the same time, the lack of an efficient stirring mechanism in the reaction tank causes quartz sand to accumulate at the bottom and corners, resulting in insufficient mixing of materials with chlorine gas and microwaves, ultimately causing problems such as fluctuations in product purity and low purification efficiency. Utility Model Content
[0006] To address the problems of uneven quartz sand distribution, material blockage, and insufficient mixing in the prior art, this invention provides a microwave chlorination device for high-purity quartz sand.
[0007] To achieve the above functions, the technical solution adopted by this utility model is as follows: a microwave chlorination device for high-purity quartz sand, comprising a reaction tank, a microwave generator, and a chlorine gas delivery assembly; the microwave generator is disposed on the side of the reaction tank, and its waveguide port extends into the interior of the reaction tank; The chlorine delivery assembly includes a gas storage tank, a gas flow controller, and a gas pipe. The gas flow controller is installed on the gas storage tank. One end of the gas pipe is connected to the gas flow controller, and the other end passes through the top of the reaction tank and extends into the interior. The reaction vessel is equipped with a dispersing mechanism inside, and an auxiliary feeding component that works with the dispersing mechanism to discharge materials is provided on the top of the reaction vessel; a stirring mechanism is provided on the reaction vessel.
[0008] Furthermore, the dispersing mechanism includes a supporting ring, a vibrating ring, a shock-absorbing assembly, a vibrating motor, and a strainer. The outer edge of the supporting ring is fixedly connected to the inner wall of the reaction vessel. The vibrating ring is movably disposed on the inner side of the supporting ring. The vibrating motor is installed on the outer wall of the vibrating ring. The supporting ring and the vibrating ring are connected by the shock-absorbing assembly. The strainer is fixedly installed on the inner wall of the vibrating ring.
[0009] Furthermore, the shock absorption assembly includes shock absorption damping and shock absorption springs. Multiple sets of shock absorption damping are evenly distributed along the top of the support ring, with their bottoms fixed to the top of the support ring and their top movable ends fixed to the outer wall of the vibration ring. The shock absorption springs are sleeved on the outside of the shock absorption damping.
[0010] Furthermore, the auxiliary feeding assembly includes a stirring motor and an auxiliary rod. The stirring motor is fixed to the top of the reaction tank, and its output shaft passes through the top of the reaction tank and is fixedly connected to the auxiliary rod. The auxiliary rod is rotatably located inside the vibrating ring.
[0011] Furthermore, the bottom of the auxiliary rod is evenly provided with hard bristles, and the hard bristles are located above the stencil.
[0012] Furthermore, a support plate is provided inside the reaction vessel; The stirring mechanism includes a drive motor, a first bevel gear, a second bevel gear, a stirring rod, and stirring blades. The drive motor is fixedly mounted on the outside of the reaction tank, and its output shaft passes through the side of the reaction tank and extends into the inside of the reaction tank. The output shaft is connected to the first bevel gear. The stirring rod rotates through a support plate, and its top end is connected to the second bevel gear. Two sets of stirring blades are symmetrically arranged and located on both sides of the stirring rod. The first bevel gear and the second bevel gear are meshed together. A protective cover is provided on the support plate, and the first and second bevel gears are located inside the protective cover.
[0013] Furthermore, the stirring rod extends through the support plate and to the bottom of the reaction vessel; The top of the reaction vessel is cylindrical and the bottom is conical, and the shape of the stirring blades is adapted to the outline of the reaction vessel.
[0014] Furthermore, the top of the reaction tank is connected to a feed hopper with a sealing valve and a tail gas treatment pipe, and the bottom of the reaction tank is connected to a discharge pipe with a sealing valve. Support columns are evenly installed at the bottom of the reaction tank and the gas storage tank, respectively.
[0015] Compared with the prior art, the present invention achieves the following beneficial effects by adopting the above structure: 1. Through the coordinated design of the dispersing mechanism and auxiliary feeding components, the vibrating ring drives the perforated plate to achieve initial dispersion of quartz sand. Simultaneously, the hard brush at the bottom of the auxiliary rod further disperses and cleans the material on the perforated plate surface, effectively preventing material clumping and ensuring the quartz sand falls in a uniformly dispersed state. This synergistic effect significantly increases the contact area and contact time between the quartz sand and the downward-diffusing chlorine gas, while also allowing microwave energy to act more evenly on each particle, laying the foundation for improving the efficiency of the gas-solid reaction.
[0016] 2. Through the coordinated design of the stirring mechanism, the driving motor, via bevel gear transmission, rotates the stirring rod and blades, thoroughly agitating and tumbling the quartz sand falling into the reaction zone. This prevents material accumulation within the tank, further promoting comprehensive mixing of the quartz sand, microwave energy, and chlorine gas, ensuring the chlorination reaction proceeds efficiently under uniform conditions, and significantly improving the purification effect of the quartz sand. Attached Figure Description
[0017] Figure 1 A schematic diagram of the overall structure of a microwave chlorination device for high-purity quartz sand proposed in this utility model. Figure 1 ; Figure 2 A schematic diagram of the overall structure of a microwave chlorination device for high-purity quartz sand proposed in this utility model. Figure 2 ; Figure 3 This is a cross-sectional view of a microwave chlorination device for high-purity quartz sand proposed in this utility model; Figure 4 This is a schematic diagram of the overall structure of the stirring mechanism proposed in this utility model; Figure 5 This is a schematic diagram of the overall structure of the dispersing mechanism and auxiliary feeding assembly proposed in this utility model; Figure 6 for Figure 5 Enlarged view of section A in the image; Figure 7This is a schematic diagram of the overall structure of the auxiliary feeding component proposed in this utility model.
[0018] The components include: 1. Reaction tank; 2. Microwave generator; 3. Chlorine conveying assembly; 31. Gas storage tank; 32. Gas flow controller; 33. Gas pipe; 4. Dispersing mechanism; 41. Support ring; 42. Vibrating ring; 43. Shock absorption assembly; 431. Shock absorption damping; 432. Shock absorption spring; 44. Vibration motor; 45. Slot plate; 5. Auxiliary feeding assembly; 51. Stirring motor; 52. Auxiliary rod; 6. Stirring mechanism; 61. Drive motor; 62. Straight bevel gear one; 63. Straight bevel gear two; 64. Stirring rod; 65. Stirring blade; 7. Protective cover; 8. Support plate; 9. Feed hopper; 10. Tail gas treatment pipe; 11. Discharge pipe; 12. Support column. Detailed Implementation
[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention will be further described in detail below with reference to the accompanying drawings.
[0022] like Figure 1-7As shown, the present invention provides a microwave chlorination device for high-purity quartz sand, including a reaction tank 1, a microwave generator 2, and a chlorine gas delivery assembly 3; the microwave generator 2 is disposed on the side of the reaction tank 1, and its waveguide port extends into the interior of the reaction tank 1, and microwaves are introduced into the interior of the reaction tank 1 through the waveguide port. The microwaves selectively excite the polar molecules in the quartz sand through the dielectric heating effect, causing it to heat up rapidly. The chlorine delivery assembly 3 includes a gas storage tank 31, a gas flow controller 32, and a gas pipe 33. The gas flow controller 32 is installed on the gas storage tank 31. One end of the gas pipe 33 is connected to the gas flow controller 32, and the other end passes through the top of the reaction tank 1 and extends into the interior. The gas storage tank 31 provides high-purity chlorine gas, and the gas flow controller 32 precisely regulates the chlorine gas input to ensure a stable chlorine gas concentration during the reaction process. The chlorine gas is introduced from the top of the reaction tank 1 through the gas pipe 33, diffuses from top to bottom, and fully contacts the quartz sand to improve the gas-solid reaction efficiency. The reaction tank 1 is equipped with a dispersing mechanism 4 inside, and an auxiliary feeding component 5 is installed on the top of the reaction tank 1 to cooperate with the dispersing mechanism 4 to achieve material feeding. A stirring mechanism 6 is installed on the reaction tank 1. The dispersing mechanism 4 is used to disperse the material feeding, and together with the auxiliary feeding component 5 on the top, it can disperse the quartz sand feeding, which can increase the reaction contact time between the quartz sand and chlorine gas and improve the reaction efficiency. The stirring mechanism 6 can fully stir the quartz sand after feeding, further promote the full mixing of materials, microwave and chlorine gas, and ensure that the chlorination reaction is uniform and efficient.
[0023] like Figure 3 , 5 As shown in Figure 7, the dispersing mechanism 4 includes a supporting ring 41, a vibrating ring 42, a shock-absorbing component 43, a vibrating motor 44, and a perforated plate 45. The outer edge of the supporting ring 41 is fixedly connected to the inner wall of the reaction tank 1. The vibrating ring 42 is movably disposed on the inner side of the supporting ring 41. The vibrating motor 44 is installed on the outer wall of the vibrating ring 42. The supporting ring 41 and the vibrating ring 42 are connected by the shock-absorbing component 43. The perforated plate 45 is fixedly installed on the inner wall of the vibrating ring 42. During operation, the vibrating motor 44 generates vibration and drives the vibrating ring 42 to vibrate, thereby causing the perforated plate 45 fixed on the inner side of the vibrating ring 42 to vibrate synchronously. The quartz sand material falls onto the perforated plate 45, is dispersed under the action of vibration, and falls through the holes of the perforated plate 45 to achieve the initial dispersion of the material.
[0024] like Figure 3 , 5As shown in Figure 6, the shock absorption assembly 43 includes a shock absorption damper 431 and a shock absorption spring 432. Multiple sets of shock absorption dampers 431 are evenly distributed along the top of the support ring 41. The bottom of the damper 431 is fixed to the top of the support ring 41, and the movable end of the top is fixed to the outer wall of the vibrating ring 42. The shock absorption spring 432 is sleeved on the outside of the shock absorption damper 431. The shock absorption damper 431 can effectively buffer the impact force caused by the vibration of the vibrating ring 42 on the support ring 41, while the shock absorption spring 432 further enhances the shock absorption effect. The two work together to stabilize the amplitude of the vibrating ring 42 and significantly suppress the transmission of vibration to the support ring 41, thereby reducing the impact on the support ring 41 and the overall structure of the reaction vessel 1.
[0025] like Figure 1-3 As shown in Figures 5 and 7, the auxiliary feeding assembly 5 includes a stirring motor 51 and an auxiliary rod 52. The stirring motor 51 is fixed to the top of the reaction tank 1, and its output shaft passes through the top of the reaction tank 1 and is fixedly connected to the auxiliary rod 52. The auxiliary rod 52 is rotatably located inside the vibrating ring 42. Hard brushes are evenly distributed at the bottom of the auxiliary rod 52, and the hard brushes are located above the sluice plate 45. When the stirring motor 51 is started, its output shaft rotates and drives the auxiliary rod 52 to rotate. The hard brushes rotate accordingly, which can clean the surface of the sluice plate 45 to prevent quartz sand from clogging the holes of the sluice plate 45, and can also further disperse the material on the sluice plate 45 to make the material particles more uniform, improve the contact effect with chlorine gas, and ensure the continuity and stability of the feeding process.
[0026] like Figure 1-4As shown, a support plate 8 is installed inside the reaction tank 1; the stirring mechanism 6 includes a drive motor 61, a first bevel gear 62, a second bevel gear 63, a stirring rod 64, and stirring blades 65. The drive motor 61 is fixedly installed on the outside of the reaction tank 1, and its output shaft passes through the side of the reaction tank 1 and extends into the inside of the reaction tank 1, and the output shaft is connected to the first bevel gear 62; the stirring rod 64 rotates through the support plate 8, and its top end is connected to the second bevel gear 63. Two sets of stirring blades 65 are symmetrically arranged and located on both sides of the stirring rod 64. The first bevel gear 62 and the second bevel gear 63 are meshed. When the drive motor 61 is started, its output shaft rotates, driving the first bevel gear 62 to rotate. Through the meshing transmission of the first bevel gear 62 and the second bevel gear 63, the horizontal rotational power is converted into stirring power. The vertical rotation of rod 64 causes the stirring blade 65 to rotate with it, stirring the surrounding quartz sand and allowing the material to flow within the reaction tank 1, preventing local accumulation and ensuring sufficient contact and reaction between the quartz sand and chlorine gas. A protective cover 7 is installed on the support plate 8, with bevel gear 1 62 and bevel gear 2 63 located inside the protective cover 7 to prevent falling quartz sand from entering the gear meshing point and affecting transmission, ensuring stable operation of the stirring mechanism 6. The stirring rod 64 extends through the support plate 8 to the bottom of the reaction tank 1. The top of the reaction tank 1 is cylindrical, and the bottom is conical. The shape of the stirring blade 65 is adapted to the contour of the reaction tank 1. The cylindrical design at the top facilitates feeding and gas distribution, while the conical structure at the bottom facilitates the concentrated discharge of materials after reaction and, in conjunction with the shape of the stirring blade 65, prevents material accumulation.
[0027] like Figure 1-3 As shown, the top of the reaction tank 1 is connected to a feed hopper 9 with a sealing valve and a tail gas treatment pipe 10. The feed hopper 9 is used to add quartz sand raw material; the tail gas treatment pipe 10 is used to discharge reaction byproducts (such as moisture or volatile impurities) and is connected to an external purification system; the bottom of the reaction tank 1 is connected to a discharge pipe 11 with a sealing valve to facilitate the collection of quartz sand after the reaction is completed; support columns 12 are evenly installed at the bottom of the reaction tank 1 and the gas storage tank 31 to provide stable support for the reaction tank 1 and the gas storage tank 31.
[0028] The specific usage method is as follows: First, add quartz sand raw material through the feed hopper 9 and close the sealing valve of the feed hopper 9. Then, turn on the gas flow controller 32 of the gas storage tank 31 and introduce high-purity chlorine gas through the gas pipe 33 from the top of the reaction tank 1, adjusting the flow rate to maintain a stable chlorine atmosphere. Start the microwave generator 2, and introduce microwaves into the interior of the reaction tank 1 through the waveguide port to heat the material. At the same time, start the stirring motor 51 and the vibration motor 44. The stirring motor 51 drives the auxiliary rod 52 to rotate, and its bottom hard brush cleans the filter plate 45 and disperses the material a second time. The vibration motor 44 drives the vibrating ring 42 and the filter plate 45 to vibrate, so that the quartz sand falls evenly. Then, start the drive motor 61, which drives the stirring rod 64 and the stirring blade 65 to rotate through gear transmission, fully stirring the falling quartz sand to ensure that it fully contacts and reacts with chlorine gas and microwaves. The by-products produced by the reaction are discharged through the tail gas treatment pipe 10. After the reaction is completed, turn off all equipment and open the sealing valve of the bottom discharge pipe 11 to collect the purified quartz sand.
[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A microwave chlorination device for high-purity quartz sand, comprising a reaction vessel (1), a microwave generator (2), and a chlorine gas delivery assembly (3), characterized in that: The microwave generator (2) is located on the side of the reaction vessel (1), and its waveguide port extends into the interior of the reaction vessel (1); The chlorine delivery assembly (3) includes a gas storage tank (31), a gas flow controller (32), and a gas pipe (33). The gas flow controller (32) is installed on the gas storage tank (31). One end of the gas pipe (33) is connected to the gas flow controller (32), and the other end passes through the top of the reaction tank (1) and extends into the interior. The reaction tank (1) is equipped with a dispersing mechanism (4) inside, and an auxiliary feeding component (5) is provided on the top of the reaction tank (1) to cooperate with the dispersing mechanism (4) to achieve feeding; a stirring mechanism (6) is provided on the reaction tank (1).
2. The microwave chlorination device for high-purity quartz sand according to claim 1, characterized in that: The dispersing mechanism (4) includes a support ring (41), a vibrating ring (42), a shock-absorbing component (43), a vibration motor (44), and a sluice plate (45). The outer edge of the support ring (41) is fixedly connected to the inner wall of the reaction vessel (1). The vibrating ring (42) is movably disposed on the inner side of the support ring (41). The vibration motor (44) is installed on the outer wall of the vibrating ring (42). The support ring (41) and the vibrating ring (42) are connected by the shock-absorbing component (43). The sluice plate (45) is fixedly installed on the inner wall of the vibrating ring (42).
3. The microwave chlorination device for high-purity quartz sand according to claim 2, characterized in that: The shock absorption assembly (43) includes a shock absorption damper (431) and a shock absorption spring (432). The shock absorption damper (431) is evenly distributed in multiple sets along the top of the support ring (41). Its bottom is fixed to the top of the support ring (41), and its top movable end is fixed to the outer wall of the vibration ring (42). The shock absorption spring (432) is sleeved on the outside of the shock absorption damper (431).
4. The microwave chlorination device for high-purity quartz sand according to claim 2, characterized in that: The auxiliary feeding assembly (5) includes a stirring motor (51) and an auxiliary rod (52). The stirring motor (51) is fixed to the top of the reaction tank (1), and its output shaft passes through the top of the reaction tank (1) and is fixedly connected to the auxiliary rod (52). The auxiliary rod (52) is rotatably located inside the vibrating ring (42).
5. The microwave chlorination device for high-purity quartz sand according to claim 4, characterized in that: The bottom of the auxiliary rod (52) is evenly provided with hard brushes, and the hard brushes are located above the sprue plate (45).
6. The microwave chlorination device for high-purity quartz sand according to claim 1, characterized in that: The reaction vessel (1) is equipped with a support plate (8); The stirring mechanism (6) includes a drive motor (61), a first bevel gear (62), a second bevel gear (63), a stirring rod (64), and stirring blades (65). The drive motor (61) is fixedly installed on the outside of the reaction tank (1), and its output shaft passes through the side of the reaction tank (1) and extends into the inside of the reaction tank (1). The output shaft is connected to the first bevel gear (62). The stirring rod (64) rotates through the support plate (8), and its top end is connected to the second bevel gear (63). Two sets of stirring blades (65) are symmetrically arranged and located on both sides of the stirring rod (64). The first bevel gear (62) and the second bevel gear (63) are meshed. A protective cover (7) is provided on the support plate (8), and the first bevel gear (62) and the second bevel gear (63) are located inside the protective cover (7).
7. The microwave chlorination device for high-purity quartz sand according to claim 6, characterized in that: The stirring rod (64) passes through the support plate (8) and extends to the bottom of the reaction vessel (1); The top of the reaction vessel (1) is cylindrical and the bottom is conical. The shape of the stirring blade (65) is adapted to the outline of the reaction vessel (1).
8. The microwave chlorination device for high-purity quartz sand according to claim 1, characterized in that: The top of the reaction tank (1) is connected to a feed hopper (9) with a sealing valve and a tail gas treatment pipe (10), and the bottom of the reaction tank (1) is connected to a discharge pipe (11) with a sealing valve. Support columns (12) are evenly installed at the bottom of the reaction tank (1) and the gas storage tank (31).