Microwave heating device and horizontal quartz sand high-temperature gasification purification device

Abstract

The utility model discloses a microwave heating device and a horizontal quartz sand high-temperature gasification purification device. The microwave heating device comprises a microwave cavity, at least one microwave emission head, a feeding pipe, a discharging pipe, an air inlet pipe and an air outlet pipe, at least one microwave emission head is connected with the microwave cavity and is used for performing microwave heating on the interior of the microwave cavity; the feeding pipe and the air outlet pipe are respectively arranged at the top of the microwave cavity; and the discharge pipe and the air inlet pipe are respectively arranged at the bottom of the microwave cavity. The microwave heating device integrates calcination and cooling, quartz sand and reaction gas are calcined under microwave high temperature, gas inclusion, fluid impurities and element impurities in the quartz sand are removed, the reaction gas enters the microwave cavity from the bottom, the gas is discharged from the top after reaction, the reaction gas and the quartz sand fully react, no dead angle exists, and the reaction effect is good. The reaction time is easy to control. The microwave heating device is arranged in a static mode, does not need to rotate, and does not leak toxic gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of quartz sand purification, in particular to a microwave heating device and a horizontal quartz sand high-temperature gasification purification device. Background Art

[0002] High-purity quartz sand is a high-purity non-metallic mineral raw material with a particle size concentrated in the range of 0.1-0.45 mm, which is produced from natural quartz minerals through a series of physical and chemical purification technologies. The internationally recognized high-purity quartz sand is a high-tech product that exceeds the IOTA-CG standard of the United States Unimin Company, and the content of twelve element impurities (Al, K, Na, Li, Ca, Mg, Fe, Mn, Cu, Cr, Ni, B) is less than 20ppm, and the alkali metals (K, Na, Li) are less than 1ppm respectively.

[0003] High-purity quartz sand is the main raw material for producing high-purity quartz glass tubes / rods and quartz glass crucibles. Quartz glass is a single-component glass of silicon dioxide. This glass has high hardness, up to mode 7, and has a series of excellent physical and chemical properties such as high temperature resistance, low expansion coefficient, thermal shock resistance, corrosion resistance, good insulation, and high light transmittance. Therefore, quartz glass is widely used in high-end electric light sources, large-scale and ultra-large-scale integrated circuits, solar cells, optical fibers, lasers, aerospace, military and other industries.

[0004] The raw material of high-purity quartz sand is natural quartz ore. In addition to quartz, quartz ore usually contains a variety of impurity minerals, such as mica, feldspar, iron-titanium oxide, etc. Quartz itself often contains some metal or non-metallic element impurities and fluid impurities due to crystal structure defects or fine cracks. Most impurities can be removed by flotation, magnetic separation, gravity separation, acid leaching, calcination and other means, but it is difficult to achieve the standard of less than 1ppm for some elements in high-purity quartz sand.

[0005] In the prior art, the quartz sand high temperature gasification purification device needs to calcine and cool the quartz sand before feeding, so as to remove the gas inclusions, fluid impurities and element impurities inside the quartz sand, and then enter the quartz sand high temperature gasification purification device for further purification. However, the above-mentioned pre-treatment steps in the prior art are relatively complicated and need to be simplified. Utility Model Content

[0006] The utility model provides a microwave heating device and a horizontal quartz sand high temperature gasification purification device to solve the problems raised in the background technology.

[0007] In order to achieve the above objectives, the utility model provides a microwave heating device, including a microwave cavity, at least one microwave launch head, a feed pipe, a discharge pipe, an air inlet pipe and an air outlet pipe;

[0008] At least one of the microwave transmitting heads is connected to the microwave cavity to perform microwave heating on the interior of the microwave cavity;

[0009] The feed pipe and the air outlet pipe are respectively arranged at the top of the microwave cavity;

[0010] The material discharge pipe and the air inlet pipe are respectively arranged at the bottom of the microwave cavity.

[0011] Preferably, it also includes a cooling layer, which is arranged around the microwave cavity.

[0012] Preferably, it also includes a microwave leakage prevention device, which is arranged at the top and bottom of the microwave cavity.

[0013] On the other hand, the utility model provides a horizontal quartz sand high-temperature gasification and purification device, comprising the above-mentioned microwave heating device, wherein the microwave heating device is arranged at the feeding position of the horizontal quartz sand high-temperature gasification and purification device.

[0014] Preferably, it also includes a gasification treatment system, which includes at least two quartz glass tubes, both ends of which are connected to the transmission structure; the quartz glass tubes are arranged in a heating system; the heating system is provided with four hot zones; the hot zones are distributed along the axial direction of the quartz glass tube; the upper end and the lower end of the quartz glass tube are respectively provided with a feeding position and a discharging position; the gasification treatment system, the heating system and the vibrating feeder are all inclined at the same angle toward the discharging position.

[0015] Preferably, the lower end of the quartz glass tube is gradually converged, and a discharge position is set at its tail end.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] The microwave heating device of the utility model integrates calcination and cooling. The discharge pipe of the microwave heating device is designed to be open, which can ensure complete and rapid discharge. Quartz sand and reaction gas are calcined at high microwave temperature to remove gas inclusions, fluid impurities and element impurities inside the quartz sand. The reaction gas enters the microwave cavity from the bottom and the gas is discharged from the top after the reaction. The reaction gas and quartz sand react fully without dead corners, and the reaction time is easy to control. The microwave heating device of the utility model adopts a static setting, does not need to rotate, and will not leak toxic gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are an embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0019] Figure 1 It is a schematic structural diagram of a microwave heating device disclosed in an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a horizontal quartz sand high-temperature gasification and purification device disclosed in an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a heating system of a horizontal quartz sand high-temperature gasification and purification device disclosed in an embodiment of the utility model;

[0022] In the figure: a microwave heating device 100, a microwave cavity 110, a microwave launch head 120, a feed pipe 130, a discharge pipe 140, an air inlet pipe 150, an air outlet pipe 160, a cooling layer 170, a microwave leakage prevention device 180, a feed position 210, a gasification treatment system 220, a quartz glass tube 230, a transmission structure 240, a heating system 250, a discharge position 260, a thermal sensing element 270, a heating element 280, and a furnace 290. DETAILED DESCRIPTION

[0023] The scheme proposed by the utility model is further described in detail below in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0024] Figure 1The schematic diagram of the structure of the microwave heating device 100 disclosed in the embodiment of the utility model is shown. The microwave heating device 100 includes a microwave cavity 110, at least one microwave launch head 120, a feed pipe 130, a discharge pipe 140, an air inlet pipe 150 and an air outlet pipe 160; at least one microwave launch head 120 is connected to the microwave cavity 110 to perform microwave heating on the inside of the microwave cavity 110, and one or more microwave launch heads 120 can be provided as needed. The feed pipe 130 and the air outlet pipe 160 are respectively arranged at the top of the microwave cavity 110, and the discharge pipe 140 and the air inlet pipe 150 are respectively arranged at the bottom of the microwave cavity 110. The discharge pipe 140 of the microwave heating device 100 is designed to be open, which can ensure complete and rapid discharge.

[0025] The microwave heating device 100 is provided with a cooling layer 170 , and the cooling layer 170 is arranged around the microwave cavity 110 .

[0026] The microwave heating device 100 is provided with a microwave leakage prevention device 180 , and the microwave leakage prevention device 180 is provided at the top and the bottom of the microwave cavity 110 .

[0027] The microwave heating device 100 of the utility model integrates calcination and cooling, and calcines quartz sand and reacts with gas at microwave high temperature. The gas reaction can be oxygen, nitrogen, hydrogen chloride, etc. The gas inclusions, fluid impurities and element impurities inside the quartz sand are removed. The reaction gas enters the microwave cavity 110 from the air inlet pipe 150, and the gas after the reaction is discharged from the air outlet pipe 160 at the top. The reaction gas and the quartz sand react fully, there is no dead angle, and the reaction time is easy to control. The design temperature of the feed pipe 130 of the microwave heating device 100 is 1800°C, the operating temperature is 1350°C according to the heating temperature of the product, and the temperature of the product after cooling is 280°C, which mainly removes lithium, titanium and gas inclusions in the quartz sand. The microwave heating device 100 adopts a static setting, does not need to rotate, and is provided with a microwave anti-leakage device 180, which will not leak toxic gases.

[0028] Figure 2 and Figure 3 The schematic diagram of the structure of the horizontal quartz sand high temperature gasification purification device disclosed in the embodiment of the utility model is shown. The horizontal quartz sand high temperature gasification purification device includes the microwave heating device 100 disclosed in this embodiment. The microwave heating device 100 is arranged at the feed position 210 of the quartz sand high temperature gasification purification device. Figure 2 After being purified by the microwave heating device 100 disclosed in the embodiment of the utility model, the quartz sand enters the horizontal quartz sand high-temperature gasification purification device for further purification.

[0029] The horizontal quartz sand high-temperature gasification purification device also includes a gasification treatment system 220, which includes at least two quartz glass tubes 230, both ends of which are connected to the transmission structure 240, so that the quartz glass tubes 230 can rotate synchronously at a constant speed.

[0030] The quartz glass tube 230 is arranged in the heating system 250. The heating system 250 is provided with four hot zones, which are distributed along the axial direction of the quartz glass tube 230, so that the material in the quartz glass tube 230 can be fully and evenly heated. The upper end and the lower end of the quartz glass tube 230 are respectively provided with a feeding position 210 and a discharging position 260. The discharging position 260 is connected to the cooling device through an intermediate transition hopper, so that the processed material can be cooled for packaging. The gasification processing system 220 and the heating system 250 are both inclined at the same angle toward the discharging position 260 to facilitate the flow of materials. The inclination angle can be adjusted according to the use requirements.

[0031] The transmission structure 240 includes a plurality of furnace tube clamps and a plurality of transmission wheel groups connected by chains. The furnace tube clamps are respectively clamped at both ends of the quartz glass tube 230 and are connected to the transmission wheel group through load-bearing wheels, so that the quartz glass tube 230 is placed in the transmission wheel group; the transmission wheel group realizes transmission by meshing the transmission gear of the chain and the continuously variable speed reducer.

[0032] Each hot zone is provided with a heat sensing element 270 and a heating element 280 to heat the furnace 290 and detect the temperature therein. The top of the hot zone is made of high temperature resistant ceramic fiber modules, the furnace mouth is made of high temperature resistant mullite bricks, and the inner wall of the furnace body and the inner insulation are backed by ceramic fiberboard.

[0033] The feeding position 210 is a flange ring, and the discharging position 260 is a cone, which is convenient for the material to be fed in and out. Alternatively, the lower end of the quartz glass tube 230 can be closed, and the discharging position 260 can be set below the center line thereof.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. In addition, the term "connection" herein means that A and B are directly connected, or that A and B are indirectly connected, such as A and B are connected through C, or even through more components such as C and D, and A and B can be connected in one piece, or in separate pieces, or removable or fixed. The term "optional" herein means that the technical feature can be combined or not combined with any feature in the text.

[0035] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A microwave heating device, characterized in that: It includes a microwave cavity, at least one microwave emitting head, a feed pipe, a discharge pipe, an air inlet pipe and an air outlet pipe; At least one of the microwave transmitting heads is connected to the microwave cavity to perform microwave heating on the interior of the microwave cavity; The feed pipe and the air outlet pipe are respectively arranged at the top of the microwave cavity; The material discharge pipe and the air inlet pipe are respectively arranged at the bottom of the microwave cavity.

2. The microwave heating device according to claim 1, characterized in that: It also includes a cooling layer, which is arranged around the microwave cavity.

3. The microwave heating device according to claim 1, characterized in that: It also includes a microwave leakage prevention device, which is arranged on the top and bottom of the microwave cavity.

4. A horizontal quartz sand high temperature gasification purification device, characterized in that: It comprises the microwave heating device as described in any one of claims 1 to 3, wherein the microwave heating device is arranged at the feeding position of a horizontal quartz sand high-temperature gasification and purification device.

5. The horizontal quartz sand high temperature gasification purification device according to claim 4, characterized in that: It also includes a gasification processing system, which includes at least two quartz glass tubes, both ends of which are connected to the transmission structure; the quartz glass tubes are arranged in a heating system; the heating system is provided with four hot zones; the hot zones are distributed along the axial direction of the quartz glass tube; the upper end and the lower end of the quartz glass tube are respectively provided with a feeding position and a discharging position; the gasification processing system, the heating system and the vibrating feeder are all inclined at the same angle toward the discharging position.

6. The horizontal quartz sand high temperature gasification purification device according to claim 5, characterized in that: The lower end of the quartz glass tube is gradually converged, and a discharge position is arranged at the tail end thereof.

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