High-purity quartz sand high-temperature impurity removal device for photovoltaic crucible

Abstract

The application discloses a high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles, which comprises a preheating chamber, a conveying mechanism, a shunt mechanism and a microwave chamber, and a heating element is arranged in the preheating chamber; the conveying mechanism comprises a plurality of conveying belts arranged in the preheating chamber; the shunt mechanism comprises a plurality of shunt grooves arranged at the tail ends of the conveying belts, each shunt groove is arranged at the tail end of a conveying belt in a one-to-one manner, and a plurality of flow guide pipes are arranged at the bottom of each shunt groove; a plurality of refraction plates are arranged in the microwave chamber, the microwave chamber is divided into a plurality of microwave resonance cavities, a plurality of inclined quartz pipes are rotatably arranged on the microwave chamber and respectively penetrate through corresponding microwave resonance cavities, and the flow guide pipes are inserted into the inclined top ends of the quartz pipes. The high-purity quartz sand is preheated and shunted, the microwave chamber is divided into a plurality of microwave resonance cavities, and the rotation of the quartz pipes is matched to form stirring, so that the high-purity quartz sand microwave impurity removal effect is efficient and high in quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quartz production, and particularly relates to a high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles. BACKGROUND

[0002] The main impurities of natural quartz quality are mineral impurities, element impurities and gas-liquid impurities, wherein the content of gas-liquid impurities is a decisive factor affecting many properties of quartz glass and is also the key and difficulty of impurity removal of high-purity quartz. Impurities can be effectively removed by microwave heating. When the quartz sand is heated to 600 DEG C and 900 DEG C by the microwave field, the content of gas-liquid inclusions decreases sharply, and more and wider microcracks are generated on the surface of quartz particles. Most of the gas-liquid inclusions burst and escape along the microcracks under the action of the microwave field, achieving the purpose of impurity removal.

[0003] The existing microwave treatment equipment, for example, Chinese patent 202122958336.7 discloses an efficient quartz sand drying device, which comprises a rack, and a drying box and a motor installed on the rack. At least one quartz glass tube is rotatably arranged on the drying box, and the motor is in transmission connection with the quartz glass tube to drive the quartz glass tube to rotate. One end of the quartz glass tube forms a feeding port, and the other end of the quartz glass tube forms a discharging port. A microwave generator and a plurality of heaters are also installed on the drying box.

[0004] Microwave heating can not only be used for drying of quartz sand, but also for microwave heating and impurity removal of quartz sand. For the above-mentioned prior art, there are still the following problems: under the same treatment amount of quartz sand, the fewer the number of quartz containing tubes, the greater the accumulation thickness of quartz sand in the tubes, and the relatively low rate of microwave penetration and heating of quartz sand, which requires longer containing time. Therefore, in order to improve the impurity removal quality and efficiency, how to improve the efficiency of microwave penetration and heating of quartz sand to the target temperature is a technical problem to be solved. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provides a high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles, which solves the technical problem of how to improve the efficiency of microwave penetration and heating of quartz sand to the target temperature in the prior art.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] The present application provides a high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles, which comprises:

[0008] A preheating chamber is provided with a heating element therein;

[0009] A conveying mechanism comprises a plurality of conveying belts arranged in the preheating chamber;

[0010] A diversion mechanism includes multiple diversion troughs located at the ends of the conveyor line, each trough corresponding to the tail end of the conveyor belt, and several guide pipes at the bottom of each diversion trough; and

[0011] A microwave cavity is provided with several refracting plates that separate the microwave cavity and form multiple microwave resonant cavities. Several inclined quartz tubes are rotatably arranged on the microwave cavity and pass through the corresponding microwave resonant cavities. A guide tube is inserted at the inclined top of the quartz tube. A microwave assembly is also provided on the microwave cavity for generating microwaves in each of the microwave resonant cavities.

[0012] In some embodiments, a feed inlet is provided on one side of the preheating chamber, and multiple conveyor belts are arranged sequentially from top to bottom and all pass through the feed inlet to the outside. A detachable smearing plate is provided on the feed inlet for spreading the quartz sand flat on the conveyor belts for conveying.

[0013] In some embodiments, the diversion channel is provided with a conical cavity corresponding to the guide pipe, for guiding the quartz sand to flow into the guide pipe.

[0014] In some embodiments, a rotation drive is provided on the outside of the microwave cavity to drive the quartz tube to rotate, and a plurality of arc-shaped blades are provided inside the quartz tube to agitate the quartz sand and slow down the sliding speed of the quartz sand.

[0015] In some embodiments, a group of the refracting plates are arranged at equal intervals from top to bottom to separate multiple microwave resonant cavities.

[0016] In some embodiments, a group of the refracting plates are arranged equidistantly from left to right, separating multiple microwave resonant cavities.

[0017] In some embodiments, a group of the refracting plates are arranged equidistantly from front to back, separating a microwave resonant cavity with multiple cells.

[0018] In some embodiments, the microwave assembly includes a microwave generator and a waveguide, wherein the microwave emitting ends of a plurality of microwave generators are respectively connected to a waveguide, and the waveguide extends and is inserted into a corresponding microwave resonant cavity.

[0019] In some embodiments, both the refractive plate and the inner wall of the microwave cavity are made of stainless steel.

[0020] In some embodiments, the heating element is an electric heating plate or a gas-fired heat pipe.

[0021] Compared with the prior art, the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided by the present invention preheats and diverts the high-purity quartz sand, divides the microwave cavity into multiple microwave resonant cavities, and, in conjunction with the rotation of the quartz tube, forms a stirring effect, which has a high efficiency and high quality microwave impurity removal effect for high-purity quartz sand. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided in an embodiment of the present invention;

[0023] Figure 2 This is a front sectional view of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided in this embodiment of the invention;

[0024] Figure 3 This is a three-dimensional diagram of the layered microwave resonant cavity structure of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided in this embodiment of the invention;

[0025] Figure 4 This is a three-dimensional diagram of the layered and segmented microwave resonant cavity structure of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided in this embodiment of the invention;

[0026] Figure 5 This is a cross-sectional view of the layered and segmented microwave resonant cavity of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided in this embodiment of the invention;

[0027] Figure 6 This is a three-dimensional diagram of the layered, segmented, and gridded microwave resonant cavity structure of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles provided in this embodiment of the invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Preheating chamber; 101. Heating element; 102. Feed inlet; 103. Scraping plate;

[0030] 2. Conveying mechanism; 201. Conveyor belt;

[0031] 3. Diverting mechanism; 301. Diverting channel; 302. Guide pipe; 303. Conical cavity;

[0032] 4. Microwave chamber; 401. Refracting plate; 402. Microwave resonant cavity; 403. Quartz tube; 404. Curved blade;

[0033] 5. Microwave components; 51. Microwave generator; 52. Waveguide;

[0034] 6. Rotation drive component. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] To address the technical problem of improving the efficiency of microwave penetration of quartz sand and heating it to the target temperature, this invention provides a high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles, which can improve the efficiency of microwave penetration of quartz sand and heating it to the target temperature.

[0037] It should be noted that the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles described in this invention is used for, but not limited to, quartz sand impurity removal. For ease of explanation, this invention will only use the application of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles to quartz sand impurity removal as an example. The principle of the high-purity quartz sand high-temperature impurity removal device for photovoltaic crucibles in other types of equipment is essentially the same as that in quartz sand impurity removal, and will not be elaborated here.

[0038] Please see Figure 1 and Figure 2A high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles is provided, comprising a preheating chamber 1, a conveying mechanism 2, a diversion mechanism 3, and a microwave chamber 4. The preheating chamber 1 is equipped with a heating element 101 for heating the chamber and the quartz sand entering it. Specifically, the conveying mechanism 2 includes multiple conveyor belts 201 installed within the preheating chamber 1, which transport the quartz sand to the preheating chamber 1 for preheating, thereby raising its temperature. After being fed into the preheating chamber 1, the quartz sand is divided into multiple streams by a diversion mechanism 3, reducing the thickness of the transported quartz sand that can accumulate. The diversion mechanism 3 includes multiple diversion troughs 301 located at the ends of the conveyor lines. Each diversion trough 301 is correspondingly located at the tail end of the conveyor belt 201. The bottom of each diversion trough 301 has several guide pipes 302. The multiple conveyor belts 201 transport the quartz sand in multiple batches, while the multiple diversion troughs 301 and guide pipes 302 divert each batch of quartz sand into multiple streams. The quartz sand is introduced into the quartz tube 403 in the subsequent microwave chamber 4. Several inclined quartz tubes 403 are rotatably arranged on the microwave chamber 4. The guide tube 302 is inserted into the inclined top of the quartz tube 403, serving as a channel for the quartz sand to pass through the microwave chamber 4. As the quartz sand is divided into multiple streams, it enters one by one into multiple quartz tubes 403, reducing the thickness that a single stream of quartz sand can accumulate in the transport channel, allowing microwaves to penetrate and heat efficiently, improving the efficiency of microwave heating, and reducing the required holding time in the microwave chamber 4. Within the microwave cavity 4, several refracting plates 401 are provided, dividing the microwave cavity 4 and forming multiple microwave resonant cavities 402. Quartz tubes 403 pass through the corresponding microwave resonant cavities 402. The microwave cavity 4 is also equipped with microwave components 5, which are used to generate microwaves in each of the microwave resonant cavities 402. Compared to the large, whole microwave cavity 4, dividing it into multiple small microwave resonant cavities 402 not only shortens the distance that microwaves need to travel for refraction, but also forms the back-and-forth reflection of microwaves along the inner wall of the cavity. This repeated reflection generates resonance, allowing microwave energy to be transferred back and forth in the cavity, thereby increasing energy and amplitude, and further improving the efficiency of microwave heating.

[0039] In this embodiment, the quartz sand is first preheated in the preheating chamber 1. At this time, the quartz sand is heated in time during the diversion action before entering the microwave chamber 4, reducing the heating time required for subsequent microwave heating. Then, the quartz sand is diverted into multiple streams by the diversion mechanism 3 in the preheating chamber 1, and the quartz sand is dispersed for the next step to avoid the quartz sand accumulating too thickly when passing through the microwave chamber 4. In the microwave chamber 4, multiple quartz tubes 403 are used to penetrate the quartz sand, and the quartz tubes 403 can rotate to agitate the quartz sand. The entire microwave chamber 4 is divided by a refractive plate 401 to form multiple microwave resonant cavities 402, which provide microwaves to reflect back and forth along the inner wall of the cavity in the resonant cavity, increasing energy and amplitude and improving the efficiency of microwave heating.

[0040] Understandably, the preheating chamber 1, the conveying mechanism 2, the diversion mechanism 3, and the microwave chamber 4 work together to preheat, divert, and stir the quartz sand, and use multiple microwave resonant cavities 402 to perform microwave heating that refines the quartz sand into smaller sections, resulting in a highly efficient and high-quality microwave impurity removal effect for the quartz sand.

[0041] In one embodiment, please refer to Figure 2 To improve the preheating effect during the conveying stage, a feed inlet 102 is provided on one side of the preheating chamber 1. Multiple conveyor belts 201 are arranged sequentially from top to bottom. In this embodiment, there are three conveyor belts 201, all of which pass through the feed inlet 102 to its outside. A detachable sizing plate 103 is provided on the feed inlet 102. The distance between the sizing plate 103 and the upper surface of the conveyor belt 201 is the thickness of the quartz sand to be spread evenly. It is used to spread the quartz sand evenly on the conveyor belt 201 for conveying. When the quartz sand passes through the feed inlet 102, any excessively thick parts will be flattened by the sizing plate 103, which plays a role in spreading the sand evenly and making the thickness of the quartz sand on the conveyor belt 201 controllable, so as to preheat it evenly and quickly.

[0042] In this embodiment, the inner wall of the preheating chamber 1 is made of heat-insulating material to keep the interior of the preheating chamber 1 warm, so as to reduce heat loss when the flow distribution mechanism 3 performs flow distribution.

[0043] In one embodiment, please refer to Figure 2 and Figure 3 In order to effectively divide the quartz sand into multiple streams for subsequent transportation, the diversion trough 301 is provided with conical cavities 303 corresponding to the guide pipes 302, which are used to guide the quartz sand to flow into the guide pipes 302. In this embodiment, there are three diversion troughs 301 corresponding to the conveyor belts 201, arranged from left to right, and there are also three conical cavities 303 and three guide pipes 302 on one diversion trough 301, arranged from front to back.

[0044] In this embodiment, the flat quartz sand is transported to the top of the diversion trough 301 by the conveyor belt 201 and falls into the diversion trough 301. The quartz sand falling into the diversion trough 301 is diverted and slides into the conical cavity 303, and finally flows into the guide pipe 302 from the bottom of the conical cavity 303, thus achieving the purpose of diversion.

[0045] In one embodiment, please refer to Figure 1 and Figure 2 A rotating drive 6 is provided on the outside of the microwave cavity 4 to drive the quartz tube 403 to rotate, thereby agitating the quartz sand. Several arc-shaped blades 404 are provided inside the quartz tube 403 to agitate the quartz sand and slow down the sliding speed of the quartz sand.

[0046] In this embodiment, the rotation drive 6 can use multiple pairs of support rollers, with each pair of support rollers corresponding to one quartz tube 403. The support rollers are supported on the outside of the quartz tube 403 and driven to rotate by a drive motor, thereby driving the quartz tube 403 to rotate. The drive motor can be a single motor, with the support rollers linked by belt drive, or multiple motors can be used, each corresponding to a pair of support rollers for rotation. The above driving methods are all conventional means in this technical field, which can achieve the rotation drive of the quartz tube 403, and will not be described in detail here.

[0047] In one embodiment, please refer to Figure 2 and Figure 3 In order to achieve the basic separation and form multiple microwave resonant cavities 402, a set of refractive plates 401 are arranged equidistantly from top to bottom to separate multiple layers of microwave resonant cavities 402. In this embodiment, there are two refractive plates 401 arranged equidistantly from top to bottom, corresponding to a 3*3 array of quartz tubes 403, which are separated into three microwave resonant cavities 402 distributed from top to bottom.

[0048] In this embodiment, each microwave resonant cavity 402 extends out three waveguides 52.

[0049] Furthermore, for a more detailed description of the distribution of the microwave resonant cavity 402, please refer to [link to relevant documentation]. Figure 4 and Figure 5 A set of the refractive plates 401 are arranged equidistantly from left to right, dividing multiple microwave resonant cavities 402. Based on the refractive plates 401 arranged equidistantly from top to bottom, the number of the refractive plates 401 arranged equidistantly from left to right in a set is three, thereby dividing nine microwave resonant cavities 402.

[0050] Furthermore, for a more detailed description of the distribution of the microwave resonant cavity 402, please refer to [link to relevant documentation]. Figure 6A set of refractive plates 401 are arranged at equal intervals from front to back, dividing the microwave resonant cavity 402 into multiple cells. Based on the refractive plates 401 arranged at equal intervals from top to bottom and from left to right, the number of sets of refractive plates 401 arranged at equal intervals from front to back is two, thereby dividing the microwave resonant cavity 402 into twenty-seven cells.

[0051] The microwave component 5 includes a microwave generator 51 and a waveguide 52. The microwave emitting ends of the plurality of microwave generators 51 are respectively connected to a waveguide 52. The waveguide 52 extends and is inserted into the corresponding microwave resonant cavity 402.

[0052] Understandably, with the increase in the number of microwave resonant cavities 402, the corresponding number of microwave generators 51 and waveguides 52 needs to be increased.

[0053] In any of the above embodiments, the inner walls of the refractive plate 401 and the microwave cavity 4 are both stainless steel plates. The stainless steel inner liner has the characteristics of strong acid and alkali resistance, strong wave guiding performance, and super heat resistance.

[0054] In any of the above embodiments, the heating element 101 is an electric heating plate or a gas heat pipe, which can serve as a preheating effect.

[0055] It is understandable that the heating element 101 can also be heated by the waste heat system in the quartz sand processing system, and this is not limited here.

[0056] To better understand this invention, the following is combined with... Figures 1 to 6 The technical solution of the present invention is described in detail as follows: Multiple conveyor belts 201 arranged from top to bottom transport quartz sand. The quartz sand passes through the feed inlet 102, is spread evenly by a smearing plate 103, and enters the preheating chamber 1 for uniform and rapid preheating. It is then transported to the diversion mechanism 3, where the quartz sand is divided into multiple streams by a diversion trough 301 and a guide pipe 302, and guided into the quartz tube 403 in the subsequent microwave chamber 4. Within the microwave chamber 4, a refractive plate 401 separates the microwave chamber 4 and forms multiple microwave resonant cavities 402. The quartz tube 403 passes through multiple microwave resonant cavities 402 in sequence. Microwaves generated by the microwave component 5 are transmitted into the microwave resonant cavity 402 and reflected back and forth along the inner wall of the cavity. Repeated reflections generate resonance, allowing microwave energy to be transferred back and forth in the cavity, increasing energy and amplitude. The quartz tube 403 is driven to rotate by the rotating drive component 6, and the arc-shaped blades 404 inside it also have the function of stirring and delaying the slippage of quartz sand. The quartz sand that has been heated and purified by microwaves is discharged from the right end of the quartz tube 403.

[0057] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles, characterized in that, include: A preheating chamber, which is equipped with heating elements; The conveying mechanism includes multiple conveyor belts installed within the preheating chamber; The diversion mechanism includes multiple diversion troughs located at the ends of the conveyor lines, each corresponding to a tail end of the conveyor belt. The bottom of each diversion trough has several guide pipes. The mechanism also includes microwave chambers, each containing several refracting plates that separate the chambers and form multiple microwave resonant cavities. Several inclined quartz tubes are rotatably mounted on each microwave chamber, penetrating the corresponding microwave resonant cavities. The guide pipes are inserted into the inclined tops of the quartz tubes. Microwave components are also mounted on the microwave chambers to generate microwaves within each microwave resonant cavity.

2. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 1, characterized in that, The preheating chamber has a feed inlet on one side, and multiple conveyor belts are arranged from top to bottom and all pass through the feed inlet to the outside. A detachable smearing plate is provided on the feed inlet for spreading the quartz sand flat on the conveyor belts for conveying.

3. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 1, characterized in that, The diversion channel is provided with a conical cavity corresponding to the guide pipe, which is used to guide the quartz sand to flow into the guide pipe.

4. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 1, characterized in that, A rotating drive is provided on the outside of the microwave cavity to drive the quartz tube to rotate. Several arc-shaped blades are provided inside the quartz tube to agitate the quartz sand and slow down the sliding speed of the quartz sand.

5. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 1, characterized in that, A set of the aforementioned refracting plates are arranged at equal intervals from top to bottom, separating multiple layers of microwave resonant cavities.

6. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 5, characterized in that, A set of the aforementioned refractive plates are arranged at equal intervals from left to right, separating multiple microwave resonant cavities.

7. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 6, characterized in that, A set of the aforementioned refractive plates are arranged at equal intervals from front to back, separating a microwave resonant cavity with multiple cells.

8. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 7, characterized in that, The microwave assembly includes a microwave generator and a waveguide. The microwave emitting ends of the plurality of microwave generators are respectively connected to a waveguide, and the waveguide extends and is inserted into the corresponding microwave resonant cavity.

9. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 8, characterized in that, The refracting plate and the inner wall of the microwave cavity are both made of stainless steel.

10. The high-temperature impurity removal device for high-purity quartz sand used in photovoltaic crucibles according to claim 1, characterized in that, The heating element is an electric heating plate or a gas-fired heat pipe.

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