High-temperature gasified quartz sand flow control device and control method

Abstract

The invention discloses a high-temperature gasified quartz sand flow control technology and method. A high-temperature gasification device, an outer sleeve, a flow control device, a waste gas treatment device, a discharge pipe and a high-temperature quartz sand cooling device are included. The flow control device is composed of a gate valve with a push-pull rod, a supporting plate and an air sealing device, and the gate valve with the push-pull rod is hung at the lower end of a discharging pipe of a gasification pipe of the high-temperature gasification device through the supporting plate and connected with the outer sleeve through the air sealing device. The amount of quartz sand flowing out of a discharging pipe of a gasification pipe is controlled by adjusting the opening degree of a gate valve which is hung at the lower end of the discharging pipe of the gasification pipe of the high-temperature gasification device and provided with a push-pull rod. Meanwhile, purified gas is utilized to purge the quartz sand flowing out through the gas sealing device, so that high-activity gas wrapped in the quartz sand is separated out, the purified gas and the high-activity gas are collected and treated by the waste gas treatment device together, and the quartz sand flows into the high-temperature quartz sand cooling device through the discharging pipe.

Description

Technical Field

[0001] The invention relates to the technical field of ultrapure quartz sand production, and in particular to a high-temperature gasified quartz sand flow control device and a control method. Background Art

[0002] The high-temperature gasification impurity removal process is to use high-activity gas and quartz sand to react at a high temperature of more than 1000°C in a quartz glass container, so that the alkali metal elements (Li, Na, K) in the quartz lattice are activated and transferred to the gas phase, and discharged together with the gas to achieve the purpose of removing the alkali metal elements in the quartz lattice. The high-temperature gasification impurity removal process is a key technology for the production of ultra-pure quartz sand, because the physical impurity removal process and chemical impurity removal process in the production process of ultra-pure quartz sand cannot remove the alkali metal impurities in the quartz lattice, and the alkali metal impurities have a great influence on the quality of ultra-pure quartz sand. The high content of alkali metal impurities not only reduces the temperature resistance of quartz glass products and affects the performance of quartz glass products, but also the high content of alkali metal elements will diffuse into the ultra-high purity materials (such as metallic silicon) in the quartz glass products at high temperatures, causing pollution to the ultra-high purity materials; the high-temperature gasification impurity removal process is the most effective technology for removing alkali metal elements in the quartz lattice. The main factors that affect the impurity removal effect of the high-temperature gasification process are reaction temperature, reaction time, and the characteristics of the highly active gas (such as the ratio and flow rate of the highly active gas). Once the reaction temperature and the characteristics of the highly active gas are determined, the reaction time becomes the key factor affecting the impurity removal effect of high-temperature gasification. The so-called reaction time is the time that the quartz sand stays in the quartz glass container used for the high-temperature gasification reaction. In the continuous production process, it is the amount of quartz sand flowing out of the quartz glass container. The greater the quartz sand flow rate, the greater the output of ultra-pure quartz sand, but the shorter the quartz sand stays in the quartz glass container, the relatively poorer the high-temperature gasification effect. In the production process of ultra-pure quartz sand, in order to accurately control the high-temperature gasification impurity removal effect and the output of ultra-pure quartz sand, it is necessary to implement safe and pollution-free flow control of the high-temperature gasified quartz sand.

[0003] At present, there is no existing technology related to quartz sand flow control in the market, and there is no technology or device for controlling the flow of quartz sand under the conditions of high temperature and high activity gas participation. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the existing quartz sand flow control, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a high-temperature gasified quartz sand flow control device and control method to solve the problem that there is no technology related to quartz sand flow control in the existing market, and there is no technology or device for flow control of quartz sand under the conditions of high temperature and high activity gas.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-temperature gasified quartz sand flow control device, comprising a high-temperature gasification device, an outer sleeve, a flow control device, an exhaust gas treatment device, a discharge pipe, a baffle pipe and a high-temperature quartz sand cooling device; wherein the high-temperature gasification device comprises a gasification pipe and a heating device; wherein the flow control device comprises a gate valve with a push-pull rod, a support plate, and an air sealing device, and the gate valve with a push-pull rod comprises a gate valve bottom plate, a gate valve side plate, a gate valve hanging plate, a push-pull rod and a handle; wherein the exhaust gas treatment device comprises an exhaust pipe, a water inlet pipe, an exhaust gas treatment device with a fan, and a support plate ... The exhaust pipe is a quartz glass tube arranged at the upper end of the outer sleeve, the water inlet pipe is arranged near the end of the exhaust pipe, and the exhaust hose connects the exhaust pipe and the exhaust neutralization device with a fan; the discharge pipe is arranged at the bottom of the outer sleeve, and the high-temperature gasified quartz sand flowing out of the discharge pipe of the gasification pipe flows into the high-temperature quartz sand cooling device from the discharge pipe after being purged with purified gas for gas sealing; the high-temperature quartz sand cooling device uses a combination of water cooling and air cooling technology to implement pollution-free cooling of the high-temperature quartz sand.

[0008] As a preferred solution of the high-temperature gasification quartz sand flow control device described in the present invention, the gasification tube is a cylindrical quartz glass tube with a feed pipe arranged at the center of the top and a discharge pipe arranged at the center of the bottom, the gasification tube is provided with an air inlet pipe and an air outlet pipe, and the heating device is a high-temperature electric furnace arranged outside the gasification tube.

[0009] As a preferred solution of the high-temperature gasification quartz sand flow control device described in the present invention, the outer sleeve is a quartz glass tube with the same diameter as the gasification tube and is sleeved on the lower part of the gasification tube, and the discharge pipe of the gasification tube is located in the outer sleeve.

[0010] As a preferred solution of the high-temperature gasification quartz sand flow control device described in the present invention, wherein: the gate valve bottom plate is a rectangular quartz glass plate, horizontally arranged below the discharge pipe of the gasification tube, and the narrow side of the rectangle is larger than the diameter of the discharge pipe of the gasification tube; the gate valve side plate is a quartz glass plate vertically arranged on both sides of the long side of the gate valve bottom plate, the bottom end of the gate valve side plate is connected to the gate valve bottom plate, and the upper end is connected to the gate valve hanging plate; the gate valve hanging plate is horizontally arranged on the inner side of the gate valve side plate The gate valve is made of a quartz glass sheet in a narrow strip shape, and one long side of the gate valve hanging plate is connected to the upper end of the gate valve side plate; the push-pull rod is a quartz glass rod, and the push-pull rod is parallel to the long side of the gate valve bottom plate. One end of the push-pull rod is connected to the center of the narrow side of the gate valve bottom plate, and the other end extends to the outside of the outer sleeve and is connected to the handle; the handle is a cross-shaped rod composed of quartz glass rods or a circular plate made of quartz glass plates, and the center of the cross-shaped rod or the circular plate is connected to the push-pull rod.

[0011] As a preferred solution of the high-temperature gasification quartz sand flow control device described in the present invention, wherein: the support plate is a rectangular quartz glass plate as a whole, and is horizontally arranged on the discharge pipe of the gasification tube, the height of the support plate arranged on the discharge pipe is subject to the height of the gate valve side plate, so that the gate valve with a push-pull rod can be hung on the support plate through the gate valve hanging plate, and a certain gap is provided between the gate valve bottom plate and the lower end of the discharge pipe of the gasification tube, the width of the support plate is subject to the width of the gate valve bottom plate, so that the gate valve with a push-pull rod can be hung on the support plate through the gate valve hanging plate, and the discharge pipe of the gasification tube is located between the two gate valve side plates, and the support The length of the plate should be greater than 2 times the length of the gate valve bottom plate, and baffles of a certain height are vertically arranged upward on the two narrow sides of the support plate. The air sealing device includes an air sealing tube and an air inlet pipe. The air sealing tube is parallelly sleeved on the push-pull rod. One end of the air sealing tube is open and passes through the outer sleeve. The air sealing tube is connected to the outer sleeve, and the other end is outside the outer sleeve and partially blocked with a quartz glass sheet. A circular hole larger than the diameter of the push-pull rod is opened in the upper center of the sealing quartz glass sheet, so that there is a slight gap between the push-pull rod and the glass sheet when passing through the blocking glass sheet. The air inlet pipe is connected to the air sealing tube from the outside of the outer sleeve to provide the air sealing tube with purified gas for air sealing.

[0012] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for controlling the flow rate of high-temperature gasified quartz sand, using the above-mentioned high-temperature gasified quartz sand flow rate control device, including the following specific control steps: S1, setting the feed pipe of the high-temperature quartz sand cooling device between the discharge pipe and the baffle pipe; S2, using the exhaust hose to connect the exhaust gas neutralization device with the fan to the exhaust pipe; S3, opening the water supply valve of the cooling water source, supplying water to the water inlet pipe on the exhaust pipe, supplying water to the exhaust gas neutralization device with the fan, and the high-temperature quartz sand cooling device; S4, opening the water supply valve of the cooling water source, supplying water to the water inlet pipe on the exhaust pipe, supplying water to the exhaust gas neutralization device with the fan, and the high-temperature quartz sand cooling device; S5, opening the water supply valve of the cooling water source, supplying water to the water inlet pipe on the exhaust pipe, supplying water to the exhaust gas neutralization device with the fan, and the high-temperature quartz sand cooling device; S6, opening the water supply valve of the cooling water source, supplying water to the water inlet pipe on the exhaust pipe, supplying water to the exhaust gas neutralization device with the fan, and the high-temperature quartz sand cooling device; S7, opening the water supply valve of the cooling water source, supplying water to the high-temperature quartz sand cooling device, and the high-temperature quartz sand cooling device; S8, opening the water supply valve of the cooling water source, supplying water to the high-temperature quartz sand cooling device, and the high-temperature quartz sand cooling device; S9, opening the water supply valve of the cooling water source, supplying water to the high-temperature quartz sand cooling device, and the high-temperature quartz sand cooling device; S10, opening the water supply valve of the cooling water source, supplying water to the high-temperature quartz sand cooling device, and the high-temperature quartz sand cooling device. The device supplies water; S4, opens the purified gas source valve, supplies gas to the air inlet pipe of the gas sealing device and the high-temperature quartz sand cooling device; S5, pushes the handle of the gate valve with a push-pull rod into the outer sleeve, so that the gate valve bottom plate completely blocks the discharge pipe of the gasification pipe of the high-temperature gasification device, and the quartz sand is high-temperature gasified and impurities are removed in the gasification pipe; S6, slowly pulls the handle outward to open the gate valve with a push-pull rod under the discharge pipe of the gasification pipe. After a period of time, as the narrow edge of the gate valve bottom plate passes over the outer diameter of the discharge pipe of the gasification pipe to reach the inner diameter, The high-temperature vaporized quartz sand flows out of the gasification tube from the gap between the discharge pipe of the gasification tube and the bottom plate of the gate valve. As the gate valve with a push-pull rod is pulled outward, the gate valve with a push-pull rod is opened more, the gap between the bottom plate of the gate valve and the discharge pipe of the gasification tube is larger, and the amount of quartz sand flowing out is more; S7, adjust the opening degree of the purified gas source valve to make the flow of purified gas entering the air sealing tube through the air inlet pipe large enough, so that the purified gas can prevent the high-activity gas wrapped in the quartz sand from entering the gap between the push-pull rod and the air sealing tube. On the one hand, the purified gas can flow into the environment through the gap, and on the other hand, it can also enter the outer sleeve through the open end of the air sealing tube and purge the quartz sand from under the bottom plate of the gate valve, so that the high-activity gas wrapped in the quartz sand can be quickly separated from the quartz sand; S8, adjust the fan flow of the exhaust gas neutralization device with a fan, so that the purified gas and high-activity gas in the outer sleeve can be drawn out of the outer sleeve in time, and the exhaust gas can be discharged after being neutralized; S9, the high-temperature quartz sand after gas-solid separation flows into the high-temperature quartz sand cooling device through the discharge pipe for cooling treatment.

[0013] Beneficial effects of the invention: The invention provides a high-temperature gasified quartz sand flow control device and a control method. Compared with the prior art, the high-temperature gasified quartz sand flow control technology and device adopt a suspended, push-pull gate valve process, combined with a gas sealing technology, to implement flow control on the discharge pipe of the gasification pipe of the high-temperature gasification device. At the same time, the purified gas used for the gas seal can also blow out highly active gases from the quartz sand, and the gases are collected and processed by the waste gas treatment device, thereby achieving safe and pollution-free flow control of the high-temperature gasified quartz sand, and providing the possibility of finding a balance between the high-temperature gasification effect and the output of ultra-pure quartz sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0015] Figure 1 This is a schematic diagram of the overall structure of the high-temperature gasified quartz sand flow control device provided by the present invention.

[0016] Figure 2 This is a schematic structural diagram of a gate valve with a push-pull rod in a high-temperature gasified quartz sand flow control device provided by the present invention.

[0017] Figure 3 A method flow chart of the high-temperature gasified quartz sand flow control method provided by the present invention.

[0018] Legend:

[0019] 1. High temperature gasification device——11. Gasification tube; 12. High temperature electric furnace;

[0020] 2. Outer sleeve;

[0021] 3. Flow control device - 31. Gate valve with push-pull rod: 311. Gate valve bottom plate; 312. Gate valve side plate; 313. Gate valve hanging plate; 314. Push-pull rod; 315. Handle; 32. Support plate; 33. Air sealing device: 331. Air sealing pipe; 332. Air inlet pipe;

[0022] 4. Exhaust gas treatment device - 41. Exhaust pipe; 42. Water inlet pipe; 43. Exhaust gas neutralization device with fan; 44. Exhaust gas hose;

[0023] 5. Discharge pipe;

[0024] 6. Baffle tube;

[0025] 7. High temperature quartz sand cooling device. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] At present, there is no existing technology related to quartz sand flow control in the market, and there is no technology or device for controlling the flow of quartz sand under the conditions of high temperature and high activity gas participation.

[0031] Therefore, refer to Figure 1 and Figure 2 The present invention provides a high-temperature gasified quartz sand flow control device, comprising a high-temperature gasification device 1, an outer sleeve 2, a flow control device 3, an exhaust gas treatment device 4, a discharge pipe 5, a baffle pipe 6, and a high-temperature quartz sand cooling device 7;

[0032] The high-temperature gasification device 1 includes a gasification tube 11 and a heating device 12; the gasification tube 11 is a cylindrical quartz glass tube with a feed tube arranged at the top center and a discharge tube arranged at the bottom center, and an air inlet pipe and an air outlet pipe are arranged on the gasification tube; the heating device 12 is a high-temperature electric furnace arranged outside the gasification tube 11;

[0033] The outer sleeve 2 is a quartz glass tube having the same diameter as the gasification tube 11 and sleeved on the lower part of the gasification tube 11. The discharge pipe of the gasification tube 11 of the high-temperature gasification device 1 is located in the outer sleeve 2.

[0034] Flow control device 3( Figure 1 , Figure 2) is composed of a gate valve 31 with a push-pull rod, a support plate 32, and an air sealing device 33. The gate valve 31 with a push-pull rod includes a gate valve bottom plate 311, a gate valve side plate 312, a gate valve hanging plate 313, a push-pull rod 314, and a handle 315; the gate valve bottom plate 311 is a rectangular quartz glass plate, horizontally arranged below the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1, and the narrow side of the rectangle is larger than the diameter of the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1; the gate valve side plate 31 2 is a quartz glass plate vertically arranged on both sides of the long side of the gate valve bottom plate 311, the bottom end of the gate valve side plate 312 is connected to the gate valve bottom plate 311, and the upper end is connected to the gate valve hanging plate 313; the gate valve hanging plate 313 is a narrow strip of quartz glass horizontally arranged on the inner side of the gate valve side plate 312, one long side of the gate valve hanging plate 313 is connected to the upper end of the gate valve side plate 312, and the gate valve 31 with the push-pull rod is hung on the support plate 32 as a whole by the gate valve hanging plate 313 ( Figure 2 ); the push-pull rod 314 is a quartz glass rod, the push-pull rod 314 is parallel to the long side of the gate valve bottom plate 311, one end of the push-pull rod 314 is connected to the center of the narrow side of the gate valve bottom plate 311, and the other end extends to the outside of the outer sleeve 2 and is connected to the handle 315; the handle 315 is a cross-shaped rod composed of quartz glass rods or a circular plate made of quartz glass plates, and the center of the cross-shaped rod or circular plate is connected to the push-pull rod 314 to facilitate pushing and pulling the gate valve 31 with the push-pull rod. The support plate 32 is a rectangular quartz glass plate as a whole, and is horizontally arranged on the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1 ( Figure 2), the height of the support plate 32 set on the discharge pipe (or the height of the support plate 32 from the bottom end of the discharge pipe) is subject to the height of the gate valve side plate 312, so that the gate valve 31 with a push-pull rod can be suspended on the support plate 32 through the gate valve hanging plate 313, and a certain gap is left between the gate valve bottom plate 311 and the lower end of the discharge pipe of the gasification pipe 11; the width of the support plate 32 is subject to the width of the gate valve bottom plate 311, so that the gate valve 31 with a push-pull rod can pass through the gate valve hanging plate 313. The valve hanging plate 313 is suspended on the support plate 32, and the discharge pipe of the gasification pipe 11 is located between the two gate valve side plates 312; the length of the support plate 32 is greater than twice the length of the gate valve bottom plate 311, and baffles of a certain height are vertically arranged on the two narrow sides of the support plate 32 to limit the push-pull range of the gate valve hanging plate 313, and at the same time, the push-pull range of the gate valve 31 with the push-pull rod is also limited. When the gate valve 31 is pushed into the outer sleeve 2 to the top, the gate valve hanging plate 313 hits the baffle plate of the narrow side of the support plate 32 and cannot be pushed inward any further. At this time, the gate valve bottom plate 311 completely blocks the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1, and no quartz sand flows out of the discharge pipe of the gasification pipe 11. When the push-pull rod 314 of the gate valve 31 with the push-pull rod is pulled out of the outer sleeve 2 to the top, the gate valve hanging plate 313 hits the other side of the support plate 32. The narrow-edge baffle cannot be pulled outward any further, and at this time, the gate valve bottom plate 311 will not block the discharge pipe of the gasification pipe 11 at all, and the quartz sand will flow out of the discharge pipe of the gasification pipe 11 at full load. When the push-pull rod 314 of the gate valve 31 with a push-pull rod is pulled to a degree between the above two states, the gate valve bottom plate 311 will partially block the discharge pipe of the gasification pipe 11, thereby achieving the purpose of controlling the flow rate of the discharge pipe of the gasification pipe 11. The air sealing device 33 includes an air sealing tube 331 and an air inlet pipe 332; the air sealing tube 331 is sleeved on the push-pull rod 314 in parallel, one end of the air sealing tube 331 is open and passes into the outer sleeve 2, the air sealing tube 331 is connected to the outer sleeve 2, and the other end of the air sealing tube 331 is outside the outer sleeve 2 and partially blocked with a quartz glass sheet. A circular hole slightly larger than the diameter of the push-pull rod 314 is opened at a position slightly above the center of the blocking quartz glass sheet, so that there is a slight gap between the push-pull rod 314 and the glass sheet when the push-pull rod 314 passes through the blocking glass sheet, which is convenient for the push-pull rod 314 to push and pull back and forth, and the push-pull rod 314 is not located at the center of the air sealing tube 331, but is located at an upper position in the air sealing tube 331, so that most of the purified gas for air sealing is blown into the outer sleeve 2 from the bottom of the push-pull rod 314; the air inlet pipe 332 is connected to the air sealing tube 331 from the outside of the outer sleeve 2 to provide the air sealing purified gas for the air sealing tube 331;

[0035] The exhaust gas treatment device 4 includes an exhaust pipe 41, a water inlet pipe 42, an exhaust gas neutralization device 43 with a fan, and an exhaust gas hose 44. The exhaust pipe 41 is a quartz glass tube arranged at the upper end of the outer sleeve 2 to discharge the purified gas for gas sealing and the highly active gas wrapped by the quartz sand out of the outer sleeve 2; the water inlet pipe 42 is arranged near the end of the exhaust pipe 41 to cool the high-temperature highly active gas and protect the exhaust gas hose 44 connected to the exhaust pipe 41; the exhaust gas neutralization device 43 with a fan mainly collects the exhaust gas through the fan and transports it to the neutralization tank to achieve the purpose of treating the exhaust gas to meet the standards; the exhaust gas hose 44 is used to connect the exhaust pipe 41 and the exhaust gas neutralization device 43 with a fan;

[0036] The discharge pipe 5 is arranged at the bottom of the outer sleeve 2. The high-temperature gasified quartz sand flowing out of the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1 flows into the high-temperature quartz sand cooling device 7 from the discharge pipe 5 after being purged by the gas seal purification gas.

[0037] The high-temperature quartz sand cooling device 7 is a device that uses a combination of water cooling and air cooling to implement pollution-free cooling on high-temperature quartz sand.

[0038] It should be noted that the high-temperature gasification device is a device for removing alkali metal impurities in the quartz lattice. Since the purpose of the present invention is mainly to control the flow of high-temperature quartz sand after being treated by the device, it does not involve the high-temperature gasification and impurity removal process of quartz sand. That is, the high-temperature gasification device in the present invention only exists as a material source for providing high-temperature gasified quartz sand. Therefore, the present invention only makes a simple description of the high-temperature gasification device, and the specific structural features have exceeded the content of the present invention. The high-temperature gasification device includes a gasification tube and a heating device; the gasification tube is a cylindrical quartz glass tube with a feed tube set at the top center and a discharge tube set at the bottom center, and the gasification tube is provided with an air inlet pipe and an air outlet pipe; the heating device is a high-temperature electric furnace arranged outside the gasification tube.

[0039] The outer sleeve is a quartz glass tube with the same diameter as the gasification tube and sleeved on the lower part of the gasification tube. The discharge pipe of the gasification tube of the high-temperature gasification device is located in the outer sleeve.

[0040] The flow control device consists of a gate valve with a push-pull rod, a support plate, and an air seal device. The gate valve with a push-pull rod includes a gate valve bottom plate, a gate valve side plate, a gate valve hanging plate, a push-pull rod, and a handle; the gate valve bottom plate is a rectangular quartz glass plate, horizontally set below the discharge pipe of the high-temperature gasification device gasification tube, and the narrow side of the rectangle is larger than the diameter of the discharge pipe of the high-temperature gasification device gasification tube; the gate valve side plate is a quartz glass plate vertically set on both sides of the long side of the gate valve bottom plate, the bottom end of the gate valve side plate is connected to the gate valve bottom plate, and the upper end is connected to the gate valve hanging plate; the gate valve hanging plate is a narrow strip of quartz glass sheet horizontally set on the inner side of the gate valve side plate, and the gate valve One long side of the hanging plate is connected to the upper end of the gate valve side plate, and the gate valve with a push-pull rod is hung as a whole on the support plate by the gate valve hanging plate; the push-pull rod is a quartz glass rod, the push-pull rod is parallel to the long side of the gate valve bottom plate, one end of the push-pull rod is connected to the center of the narrow side of the gate valve bottom plate, and the other end extends to the outside of the outer sleeve and is connected to the handle; the handle is a cross-shaped rod composed of quartz glass rods or a circular plate made of quartz glass plates, and the center of the cross-shaped rod or the circular plate is connected to the push-pull rod to facilitate pushing and pulling the gate valve with a push-pull rod. The support plate is a rectangular quartz glass plate as a whole, and is horizontally arranged on the discharge pipe of the gasification tube of the high-temperature gasification device. The height of the support plate on the discharge pipe (or the height of the support plate from the bottom end of the discharge pipe) is subject to the height of the gate valve side plate, so that the gate valve with a push-pull rod can be hung on the support plate through the gate valve hanging plate, and a certain gap is made between the gate valve bottom plate and the lower end of the discharge pipe of the gasification tube; the width of the support plate is subject to the width of the gate valve bottom plate, so that the gate valve with a push-pull rod can be hung on the support plate through the gate valve hanging plate, and the discharge pipe of the gasification tube is located between the two gate valve side plates; the length of the support plate is greater than 2 times the length of the gate valve bottom plate, and baffles of a certain height are vertically arranged upward on the two narrow sides of the support plate to limit the push-pull amplitude of the gate valve hanging plate, and at the same time, the push-pull of the gate valve with a push-pull rod is also limited. When the push-pull rod of the gate valve with a push-pull rod is pushed into the outer sleeve to the top end, the gate valve hanging plate hits the baffle on the narrow side of the support plate and cannot continue to push inward. At this time, the gate valve bottom plate completely blocks the discharge pipe of the gasification pipe of the high-temperature gasification device, and no quartz sand flows out of the discharge pipe of the gasification pipe. When the push-pull rod of the gate valve with a push-pull rod is pulled out of the outer sleeve to the top end, the gate valve hanging plate hits the baffle on the narrow side of the other side of the support plate and cannot continue to be pulled outward. At this time, the gate valve bottom plate does not block the discharge pipe of the gasification pipe at all, and quartz sand flows out of the discharge pipe of the gasification pipe at full load. When the push-pull rod of the gate valve with a push-pull rod is pulled between the above two states, the gate valve bottom plate partially blocks the discharge pipe of the gasification pipe, thereby achieving the purpose of controlling the flow rate of the discharge pipe of the gasification pipe.The air-sealing device comprises an air-sealing tube and an air inlet pipe; the air-sealing tube is sleeved on the push-pull rod in parallel, one end of the air-sealing tube is open and passes into the outer sleeve, the air-sealing tube is connected to the outer sleeve, and the other end of the air-sealing tube is outside the outer sleeve and partially blocked with a quartz glass sheet, and a circular hole slightly larger than the diameter of the push-pull rod is opened at a position slightly above the center of the blocking quartz glass sheet, so that there is a slight gap between the push-pull rod and the glass sheet when the push-pull rod passes through the blocking glass sheet, which is convenient for the push-pull rod to push and pull back and forth, and the push-pull rod is not located in the center of the air-sealing tube, but is located at an upper position in the air-sealing tube, so that most of the purified gas for air sealing is blown into the outer sleeve from below the push-pull rod, so that the purified gas can purge the quartz sand from below the bottom plate of the gate valve; the air inlet pipe is connected to the air-sealing tube from outside the outer sleeve to provide the air-sealing tube with purified gas for air sealing.

[0041] The exhaust gas treatment device includes an exhaust pipe, a water inlet pipe, an exhaust gas neutralization device with a fan, and an exhaust gas hose. The exhaust pipe is a quartz glass tube arranged at the upper end of the outer sleeve to discharge the purified gas for gas sealing and the high-activity gas wrapped by the quartz sand out of the outer sleeve; the water inlet pipe is arranged near the end of the exhaust pipe to cool the high-temperature high-activity gas and protect the exhaust gas hose connected to the exhaust pipe; the exhaust gas neutralization device with a fan mainly collects the exhaust gas through the fan and transports it to the neutralization tank to achieve the purpose of treating the exhaust gas to meet the standards. As for how the exhaust gas neutralization device with a fan collects the exhaust gas and how to neutralize the exhaust gas, it has exceeded the scope of the present invention and is not described in detail in the present invention. The present invention only uses the existing technology to treat the exhaust gas involved in the present invention to meet the standards; the exhaust gas hose is used to connect the exhaust pipe and the exhaust gas neutralization device with a fan.

[0042] The discharge pipe is arranged at the bottom of the outer sleeve. The high-temperature gasified quartz sand flowing out from the discharge pipe of the gasification pipe of the high-temperature gasification device flows into the high-temperature quartz sand cooling device from the discharge pipe after being purged with purified gas for gas sealing.

[0043] The high-temperature quartz sand cooling device is a device that uses a combination of water cooling and air cooling technology to implement pollution-free cooling of high-temperature quartz sand. The present invention only uses the existing technology to implement pollution-free cooling of the high-temperature quartz sand involved in the present invention. As for how the device implements pollution-free cooling of the high-temperature quartz sand, it is beyond the scope of the present invention and is not described in detail.

[0044] The exhaust pipe is not directly connected to the exhaust hose after being extended horizontally, but is extended horizontally for a certain distance, then bent downward, extended for a certain distance, and then bent horizontally. Before being connected to the exhaust hose, a water inlet pipe is arranged on the exhaust pipe so that the cooling water flowing into the exhaust pipe through the water inlet pipe can cool and reduce the temperature of the high-temperature and highly active gas and protect the exhaust hose. At the same time, the cooling water will not flow back into the outer casing through the exhaust pipe and cause pollution to the quartz sand.

[0045] The present invention arranges a baffle tube outside the discharge tube so that the feed tube of the high-temperature quartz sand cooling device connected to the discharge tube is covered in the baffle tube to prevent dust from entering the high-temperature quartz sand cooling device through the gap between the discharge tube and the feed tube of the high-temperature quartz sand cooling device.

[0046] See also Figure 3 The present invention also provides a high-temperature gasified quartz sand flow control technology, using the high-temperature gasified quartz sand flow control device, including the following steps:

[0047] S1, setting the feed pipe of the high-temperature quartz sand cooling device 7 between the discharge pipe 5 and the baffle pipe 6;

[0048] S2. Connect the exhaust gas neutralization device 43 with a blower to the exhaust pipe 41 using an exhaust gas hose 44;

[0049] S3. Open the water supply valve of the cooling water source to supply water to the water inlet pipe 42 on the exhaust pipe 41, to the exhaust gas neutralization device 43 with a fan, and to the high-temperature quartz sand cooling device 7;

[0050] S4, open the valve of the purified gas source to supply gas to the air inlet pipe 332 of the gas sealing device 33 and to the high-temperature quartz sand cooling device 7;

[0051] S5, push the handle 315 of the gate valve 31 with the push-pull rod into the outer sleeve 2, so that the gate valve bottom plate 311 completely blocks the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1, and the quartz sand is high-temperature gasified and impurities are removed in the gasification pipe 11 of the high-temperature gasification device 1;

[0052] S6. Slowly pull out the handle 315 of the gate valve 31 with a push-pull rod to open the gate valve 31 with a push-pull rod below the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1. As the narrow side of the gate valve bottom plate 311 passes over the outer diameter of the discharge pipe of the gasification pipe 11 and reaches the inner diameter, after a period of time, the high-temperature vaporized quartz sand flows out of the gasification pipe 11 from the gap between the discharge pipe of the gasification pipe 11 and the gate valve bottom plate 311. Moreover, the more the gate valve 31 with a push-pull rod is pulled outward, the greater the gate valve 31 with a push-pull rod is opened, and the gate valve bottom plate 311 is opened. The larger the gap between the outlet pipe 1 and the gasification pipe 11, the more quartz sand will flow out; according to the quality requirements of quartz sand, the opening degree of the gate valve 31 with a push-pull rod can be controlled to control the quartz sand flow rate of the outlet pipe of the gasification pipe 11 of the high-temperature gasification device 1, thereby controlling the residence time of the quartz sand in the gasification pipe 11, that is, controlling the high-temperature gasification time of the quartz sand, and controlling the high-temperature gasification effect of the quartz sand; and the balance between the high-temperature gasification effect and the output of ultra-pure quartz sand can be adjusted at any time according to the needs;

[0053] S7, adjust the opening degree of the purge gas source valve, so that the purge gas flow rate entering the gas sealing tube 331 through the gas inlet pipe 332 of the gas sealing device 33 is large enough, so that the purge gas can prevent the high-activity gas wrapped in the quartz sand from flowing into the environment from the gap between the push-pull rod 314 and the gas sealing tube 331, and on the other hand, the purge gas can also enter the outer sleeve 2 through the open end of the gas sealing tube 331, and purge the quartz sand from the bottom of the gate valve 311, so that the high-activity gas wrapped in the quartz sand is quickly separated from the quartz sand;

[0054] S8, adjusting the fan flow rate of the exhaust gas neutralization device 43 with a fan, so that the purified gas and the highly active gas in the outer casing 2 can be drawn out of the outer casing 2 in time, and the exhaust gas is discharged after being neutralized;

[0055] S9. After gas-solid separation, the high-temperature quartz sand flows into the high-temperature quartz sand cooling device 7 through the discharge pipe 5 for cooling treatment.

[0056] Embodiment 1:

[0057] The embodiments will demonstrate the effect of the high-temperature gasified quartz sand flow control technology and device of the present invention on the high-temperature gasified quartz sand flow control, but the present invention is not limited thereto.

[0058] Processing and manufacturing of high temperature gasified quartz sand flow control device.

[0059] First, consider the production of the high-temperature gasification device 1. The high-temperature gasification device 1 includes a gasification tube 11 and a heating device 12, which is mainly used to remove alkali metal impurities in the quartz lattice. Since the purpose of the present invention is mainly to control the flow rate of high-temperature quartz sand after being treated by the device, it does not involve the technology and device of the high-temperature gasification process of quartz sand, that is, the high-temperature gasification device 1 in the present invention only exists as a material source for providing high-temperature gasified quartz sand. Therefore, the present invention only makes a simple description of the high-temperature gasification device 1, and the specific structure has exceeded the content of the present invention. The gasification tube 11 is a cylindrical quartz glass tube, a feed pipe is arranged at the top center of the gasification tube 11, and an air outlet pipe is arranged at the top edge; in order to facilitate the clean discharge of the quartz sand in the gasification tube without residual quartz sand, the bottom of the gasification tube 11 is arranged in a conical shape, a discharge pipe is arranged in the center of the conical bottom, and an air inlet pipe is arranged at the lower part of the gasification tube 11; the present invention selects a quartz glass tube with a length of 2000mm-4000mm, a diameter of 250mm-500mm, and a thickness of 7mm-12mm to make the gasification tube 11. As a preferred embodiment, the present invention selects a quartz glass tube with a length of 3000mm, a diameter of 450mm, and a thickness of 12mm to make the gasification tube 11, and the discharge pipe of the gasification tube 11 is selected from a quartz glass tube with a length of 100mm, a diameter of 80mm, and a thickness of 12mm; the heating device 12 is a high-temperature electric furnace arranged outside the gasification tube 11, and the maximum operating temperature of the electric furnace is 1300°C.

[0060] Next, consider the production of the outer sleeve 2. The outer sleeve 2 is a quartz glass tube with the same diameter as the gasification tube 11 and is sleeved on the lower part of the gasification tube 11. The discharge pipe of the gasification tube 11 of the high-temperature gasification device 1 is located in the outer sleeve 2. The present invention selects a quartz glass tube with a length of 1000mm-1500mm, a diameter of 250mm-500mm, and a thickness of 5mm-10mm to make the outer sleeve 2. As a preferred solution, the present invention selects a quartz glass tube with a length of 1000mm, a diameter of 450mm, and a thickness of 10mm to make the outer sleeve 2.

[0061] Third, consider the production of the flow control device 3. The flow control device 3 ( Figure 1 , Figure 2 ) is composed of a gate valve 31 with a push-pull rod, a support plate 32, and an air sealing device 33. The gate valve 31 with a push-pull rod includes a gate valve bottom plate 311, a gate valve side plate 312, a gate valve hanging plate 313, a push-pull rod 314, and a handle 315; the gate valve bottom plate 311 is a rectangular quartz glass plate, horizontally arranged below the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1, and the narrow side of the rectangle is larger than the diameter of the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1. The present invention selects a quartz glass plate with a length of 90mm-150mm, a width of 80mm-140mm, and a thickness of 7mm-12mm to make the gate valve bottom plate 311. As a preferred solution, the present invention selects a quartz glass plate with a length of 120mm, a width of 110mm, and a thickness of 8mm to make the gate valve bottom plate 311. The gate valve bottom plate 311 is made of a quartz glass plate vertically arranged on the two sides of the long side of the gate valve bottom plate 311. The lower end of the gate valve side plate 312 is connected to the gate valve bottom plate 311, and the upper end is connected to the gate valve hanging plate 313. The present invention selects a quartz glass plate with a length of 120 mm, a width (or height) of 75 mm, and a thickness of 8 mm to make the gate valve side plate 312; the gate valve hanging plate 313 is a narrow strip of quartz glass sheet horizontally arranged on the inner side of the gate valve side plate 312. One side of the long side of the gate valve hanging plate 313 is connected to the upper end of the gate valve side plate 312. The gate valve 31 with a push-pull rod is hung on the support plate 32 as a whole by using the gate valve hanging plate 313 ( Figure 2), the present invention uses a quartz glass sheet with a length of 120mm, a width of 13mm, and a thickness of 8mm to make the gate valve hanging plate 313; in this way, a gate valve with an external dimension of 120mm in length, 126mm in width, and 75mm in height is manufactured, and the internal dimension of the gate valve is 120mm in length, 110mm in width, and 59mm in height. The spacing between the two gate valve hanging plates is 84mm; the push-pull rod 314 is a quartz glass rod, and the push-pull rod 314 is parallel to the long side of the gate valve bottom plate 311, and one end of the push-pull rod 314 is in contact with the gate valve bottom plate 311. The center of the narrow side is connected, and the other end extends to the outside of the outer sleeve 2 and is connected to the handle 315. The present invention uses a quartz glass rod with a length of 300mm and a diameter of 12mm to make the push-pull rod 314; the handle 315 is a cross-shaped rod composed of quartz glass rods or a circular plate made of quartz glass plates. The center of the cross-shaped rod or circular plate is connected to the push-pull rod 314 to facilitate the push-pull of the gate valve 31 with a push-pull rod. The present invention uses two quartz glass rods with a length of 60mm and a diameter of 10mm to make the cross-shaped handle 315. The support plate 32 is a rectangular quartz glass plate as a whole, and is horizontally arranged on the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1 ( Figure 1 , Figure 2), the height of the support plate 32 set on the discharge pipe (or the height of the support plate 32 from the bottom end of the discharge pipe) is subject to the height of the gate valve side plate 312, so that the gate valve 31 with a push-pull rod can be hung on the support plate 32 through the gate valve hanging plate 313, and a certain gap is left between the gate valve bottom plate 311 and the lower end of the discharge pipe of the gasification pipe 11; the width of the support plate 32 is subject to the width of the gate valve bottom plate 311, so that the gate valve 31 with a push-pull rod can be hung on the support plate 32 through the gate valve hanging plate 313, and the discharge pipe of the gasification pipe 11 is located between the two gate valve side plates 312; the support plate 3 The length of 2 is greater than twice the length of the gate valve bottom plate 311, and baffles of a certain height are vertically arranged on the two narrow sides of the support plate 32 to limit the push-pull range of the gate valve hanging plate 313, and at the same time, the push-pull range of the gate valve 31 with a push-pull rod is limited. When the push-pull rod 314 of the gate valve 31 with a push-pull rod is pushed into the outer sleeve 2 to the top, the gate valve hanging plate 313 hits the baffle of the narrow side of the support plate 32 and cannot continue to push inward. At this time, the gate valve bottom plate 311 completely blocks the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1, and the discharge pipe of the gasification pipe 11 has no quartz The sand flows out, and when the push-pull rod 314 of the gate valve 31 with a push-pull rod is pulled out of the outer sleeve 2 to the top, the gate valve hanging plate 313 contacts the baffle plate on the narrow side of the other side of the support plate 32 and cannot be pulled out further. At this time, the gate valve bottom plate 311 will not block the discharge pipe of the gasification pipe 11 at all, and the quartz sand will flow out of the discharge pipe of the gasification pipe 11 at full load. The present invention uses a glass plate with a length of 245 mm, a width of 106 mm, and a thickness of 10 mm to make the support plate 32, and welds the glass plate to the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1, so that the discharge pipe of the gasification pipe 11 is 1.5 meters away from the discharge pipe of the gasification pipe 11. The distance between the two long sides of the glass plate and the narrow side is 13mm and 22.5mm respectively. At the same time, the bottom surface of the glass support plate 32 is 45mm away from the bottom end of the discharge pipe of the vaporization tube 11. In this way, there is a 4mm gap between the bottom end of the discharge pipe of the vaporization tube 11 and the gate valve bottom plate 311 of the gate valve 31 with a push-pull rod. Finally, a glass sheet with a length of 106mm, a width of 20mm and a thickness of 10mm is selected to weld a baffle at each end of the two narrow sides of the glass support plate 32 to complete the production of the support plate 32. The spacing between the two baffles of the support plate 32 is 245mm and the height of the baffle is 20mm.The air sealing device 33 includes an air sealing tube 331 and an air inlet pipe 332; the air sealing tube 331 is parallelly sleeved on the push-pull rod 314, one end of the air sealing tube 331 is open and passes into the outer sleeve 2, the air sealing tube 331 is connected to the outer sleeve 2, and the other end of the air sealing tube 331 is outside the outer sleeve 2 and is partially blocked with a quartz glass sheet. A circular hole slightly larger than the diameter of the push-pull rod 314 is opened at a position slightly above the center of the blocking quartz glass sheet, so that there is a slight gap between the push-pull rod 314 and the glass sheet when the push-pull rod 314 passes through the blocking glass sheet, which is convenient for the push-pull rod 314 to push and pull back and forth, and the push-pull rod 314 is not in the center of the air sealing tube 331, but in the air sealing tube 331. The upper position of the sealing tube 331 allows most of the purified gas for air sealing to be blown into the outer sleeve 2 from below the push-pull rod 314. The present invention uses a quartz glass tube with a length of 100 mm, a diameter of 35 mm, and a thickness of 5 mm to make the sealing tube 331. The sealing tube 331 extends 20 mm into the outer sleeve 2. The push-pull rod 314 of the gate valve 31 with a push-pull rod is 3 mm away from the upper inner wall of the sealing tube 331. The air inlet pipe 332 is connected to the sealing tube 331 from the outside of the outer sleeve 2. The present invention uses a quartz glass tube with a diameter of 35 mm and a thickness of 5 mm to make the air inlet pipe 332. After extending vertically downward by 100 mm, it is bent into a horizontal extension of 70 mm. The gate valve 31 with a push-pull rod of the flow control device 3 is suspended on the support plate 32 through the gate valve hanging plate 313, and the push-pull rod 314 of the gate valve 31 with a push-pull rod extends to the outside of the outer sleeve 2 through the air sealing tube 331 of the air sealing device 33, and the air sealing tube 331 is connected to the outer sleeve 2.

[0062] Fourth, consider the manufacture of the exhaust gas treatment device. The exhaust gas treatment device 4 includes an exhaust pipe 41, a water inlet pipe 42, an exhaust gas neutralization device 43 with a fan, and an exhaust gas hose 44. The exhaust pipe 41 is a quartz glass tube arranged at the upper end of the outer sleeve 2 to discharge the purified gas for gas sealing and the highly active gas wrapped by the quartz sand out of the outer sleeve 2. The present invention uses a quartz glass tube with a diameter of 40 mm and a thickness of 5 mm to manufacture the exhaust pipe 41. The exhaust pipe 41 connected to the upper end of the outer sleeve 2 first extends horizontally by 250 mm, then bends downward and extends 250 mm, and finally bends and extends horizontally by 150 mm; the water inlet pipe 42 is arranged near the end of the exhaust pipe 41, which is used to cool the high-temperature highly active gas and protect the exhaust gas hose 44 connected to the exhaust pipe 41. The present invention uses a quartz glass tube with a length of 80 mm, a diameter of 25 mm, and a thickness of 3 mm to make the water inlet pipe 42, and the water inlet pipe 42 is welded to the end of the exhaust pipe 41 and a 150 mm long horizontal extension pipe; the exhaust gas neutralization device 43 with a fan mainly collects the exhaust gas through the fan and transports it to the neutralization tank, so as to achieve the purpose of treating the exhaust gas to meet the standards. The present invention uses PP plastic material to make the exhaust gas neutralization device 43 with a fan; the exhaust gas hose 44 is used to connect the exhaust pipe 41 and the exhaust gas neutralization device 43 with a fan. The present invention uses a plastic hose with appropriate specifications as the exhaust gas hose 44.

[0063] The discharge pipe 5 is arranged at the bottom of the outer sleeve 2. The high-temperature gasified quartz sand flowing out of the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1 flows into the high-temperature quartz sand cooling device 7 from the discharge pipe 5 after being purged with the gas seal purification gas. In order to prevent the quartz sand from remaining in the outer sleeve 2, the present invention sets the bottom of the outer sleeve 2 into a cone shape, and sets the discharge pipe 5 at the center of the cone. The present invention selects a quartz glass tube with a length of 150 mm, a diameter of 80 mm, and a thickness of 10 mm to make the discharge pipe 5. In addition, in order to prevent dust from entering the high-temperature quartz sand cooling device 7 through the gap between the discharge pipe 5 and the feed pipe of the high-temperature quartz sand cooling device 7, the present invention sets a baffle tube 6 on the discharge pipe 5, so that the feed pipe of the high-temperature quartz sand cooling device 7 connected to the discharge pipe 5 is covered in the baffle tube 6. The present invention selects a quartz glass tube with a length of 80 mm, a diameter of 150 mm, and a thickness of 5 mm to make the baffle tube 6, and the bottom end of the baffle tube 6 is 30 mm higher than the bottom end of the discharge pipe 5.

[0064] The high-temperature quartz sand cooling device 7 is a device that uses a combination of water cooling and air cooling technology to implement pollution-free cooling of high-temperature quartz sand. The present invention uses quartz glass material to make the high-temperature quartz sand cooling device 7. The feed pipe of the high-temperature quartz sand cooling device 7 has a diameter of 120 mm and a thickness of 5 mm, so that it can be arranged between the discharge pipe 5 and the baffle pipe 6.

[0065] After the processing and manufacturing of the above-mentioned high-temperature gasified quartz sand flow control device is completed, the connection of each component is considered. First, the feed pipe of the high-temperature quartz sand cooling device 7 is set between the discharge pipe 5 and the baffle pipe 6, and the exhaust pipe 41 is connected to the exhaust gas neutralization device 43 to the fan by using the exhaust hose 44; then, the gas source of the purified gas is connected to the air inlet pipe 332 of the gas sealing device 33 and the air inlet pipe of the high-temperature quartz sand cooling device 7 respectively, and the cooling water source is connected to the water inlet pipe of the high-temperature quartz sand cooling device 7 and the water inlet pipe 42 of the exhaust gas treatment device 4, and the water inlet pipe of the exhaust gas neutralization device 43 with the fan.

[0066] After the above supporting work is completed, the specific operation of this embodiment begins.

[0067] First, close the high-temperature gasification quartz sand flow control device. Push the handle 315 of the gate valve 31 with a push-pull rod into the outer sleeve 2, so that the gate valve bottom plate 311 of the gate valve 31 with a push-pull rod completely blocks the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1; add the quartz sand treated by the physical impurity removal process and the chemical impurity removal process into the high-temperature gasification device 1, and perform the high-temperature gasification impurity removal process on the quartz sand in the gasification pipe 11 of the high-temperature gasification device 1; in this embodiment, the contents of alkali metal elements in the quartz sand subjected to high-temperature gasification are: Li 1.64ppm, Na 5.20ppm, K 3.77ppm.

[0068] Then, open the water supply valve of the cooling water source to supply water to the water inlet pipe 42 of the exhaust gas treatment device 4 , to the exhaust gas neutralization device 43 with a fan, and to the high-temperature quartz sand cooling device 7 .

[0069] Then open the valve of the purified gas source to supply gas to the air inlet pipe 332 of the gas sealing device 33 and to the high-temperature quartz sand cooling device 7 .

[0070] Finally, the high-temperature gasified quartz sand flow control device is opened. The handle 315 of the gate valve 31 with a push-pull rod is slowly pulled outward from the outer sleeve 2 to open the gate valve 31 with a push-pull rod below the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1. As the narrow side of the gate valve bottom plate 311 passes over the outer diameter of the discharge pipe of the gasification pipe 11 and reaches the inner diameter, after a period of time, the high-temperature gasified quartz sand flows out of the gasification pipe 11 from the gap between the discharge pipe of the gasification pipe 11 and the gate valve bottom plate 311.

[0071] In this embodiment, since the volume of the gasification tube 11 of the high-temperature gasification device 1 and the temperature of the high-temperature gasification are fixed, the main factor determining the high-temperature gasification effect of the quartz sand is the gasification time of the quartz sand in the gasification tube 11 of the high-temperature gasification device 1, and the opening degree of the flow control device 3 determines the time the quartz sand stays in the gasification tube 11; in this embodiment, the gate valve 31 with a push-pull rod of the flow control device 3 is opened by one eighth, that is, the discharge pipe of the gasification tube 11 of the high-temperature gasification device 1 is blocked by 87.5%. At this time, the flow rate of the quartz sand is about 200 kg / h, and it takes about 1.5 hours for the quartz sand to enter the gasification tube 11 of the high-temperature gasification device 1 and flow out of the gasification tube 11. That is, the quartz sand has undergone about 1.5 hours of high-temperature gasification treatment in the high-temperature gasification device 1; the opening degree of the purified gas source valve is adjusted so that the purified gas can prevent the high-activity gas wrapped in the quartz sand from flowing into the environment from the gap between the push-pull rod 314 and the gas sealing tube 331 on the one hand, and the purified gas can also purge the quartz sand on the other hand, so that the high-activity gas wrapped in the quartz sand can be quickly separated from the quartz sand; the fan flow of the exhaust gas treatment device is adjusted so that the purified gas and high-activity gas in the outer sleeve 2 can be timely drawn out of the outer sleeve 2, and the exhaust gas is discharged after being neutralized; the high-temperature quartz sand after gas-solid separation flows into the high-temperature quartz sand cooling device 7 through the discharge pipe 5 for cooling treatment.

[0072] The quartz sand after cooling was sampled and tested, and the contents of alkali metal elements in the product quartz sand were: Li 0.82ppm, Na 0.46ppm, K 0.73ppm, reaching the internationally recognized high-purity (ultra-pure) quartz sand standard (in the internationally recognized ultra-pure quartz sand standard, the content of alkali metal elements is less than 1ppm).

[0073] Embodiment 2:

[0074] The same high-temperature gasification quartz sand flow control technology and device as those in Example 1 are used, and the various parameters of the quartz sand that needs to be gasified at high temperature are also the same as those in Example 1. The difference from Example 1 is the opening degree of the gate valve 31 with a push-pull rod in the flow control device 3. Compared with Example 1, the opening degree of the gate valve 31 with a push-pull rod in this embodiment is increased from one-eighth to one-fifth, that is, the blocking degree of the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1 is reduced from 87.5% to 80%.

[0075] The same operation process as in the first embodiment is adopted, except that the gate valve 31 with a push-pull rod is opened by one fifth, that is, the discharge pipe of the gasification pipe 11 of the high-temperature gasification device 1 is blocked by 80%. Under this condition, the flow rate of the high-temperature gasified quartz sand increases from about 200kg / h to about 320kg / h, and the high-temperature gasification treatment time of the quartz sand in the high-temperature gasification device 1 is reduced from 1.5 hours to about 1 hour. The quartz sand after cooling is sampled and tested, and the alkali metal element content in the product quartz sand is respectively: Li 1.05ppm, Na 1.87ppm, K 1.19ppm, which meets the internationally recognized high-purity (ultra-pure) quartz sand standard.

[0076] The present invention adopts a suspended, push-pull gate valve process, combined with gas sealing technology, to implement flow control on the discharge pipe of the gasification pipe of the high-temperature gasification device. At the same time, the purified gas used for gas sealing can also separate highly active gases from quartz sand, which are collected and processed by the exhaust gas treatment device, thereby achieving safe and pollution-free flow control of high-temperature gasified quartz sand.

[0077] When the present invention utilizes a high-temperature gasification process to remove alkali metal impurities in the quartz lattice, in order to obtain an ideal high-temperature gasification effect, it is necessary to accurately control the residence time of the quartz sand in the high-temperature gasification equipment, that is, to control the discharge amount of the high-temperature gasification equipment. Therefore, the present invention adopts a flow control device at the pipe mouth of the discharge pipe of the high-temperature gasification equipment; and in order to facilitate the control of the flow control device at high temperature, the present invention adopts a push-pull gate valve control technology, and the push-pull rod of the push-pull gate valve extends outside the equipment, that is, the opening degree of the push-pull gate valve is controlled outside the high-temperature gasification related equipment to avoid High temperature facilitates operation. At the same time, in order to prevent the highly active gas trapped by the quartz sand from escaping from the gap between the push-pull rod and the equipment to the outside of the equipment, the present invention arranges a gas sealing device at the connection between the push-pull rod and the equipment; in addition, in order to prevent the quartz sand from clogging the push-pull shaft (support shaft) of the push-pull gate valve, the present invention designs the push-pull gate valve into a suspended structure, and the support shaft of the push-pull gate valve does not support the push-pull gate valve from the bottom. In this way, during the opening process of the push-pull gate valve, the quartz sand cannot enter the support shaft of the push-pull gate valve, and the support shaft cannot be blocked, thereby achieving safe and pollution-free flow control of high-temperature gasified quartz sand.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high temperature gasified quartz sand flow control device, characterized in that: It comprises a high-temperature gasification device (1), an outer sleeve (2), a flow control device (3), an exhaust gas treatment device (4), a discharge pipe (5), a baffle pipe (6) and a high-temperature quartz sand cooling device (7); Wherein, the high-temperature gasification device (1) comprises a gasification tube (11) and a heating device (12); The flow control device (3) comprises a gate valve (31) with a push-pull rod, a support plate (32), and an air sealing device (33); the gate valve (31) with a push-pull rod comprises a gate valve bottom plate (311), a gate valve side plate (312), a gate valve hanging plate (313), a push-pull rod (314), and a handle (315); The exhaust gas treatment device (4) comprises an exhaust pipe (41), a water inlet pipe (42), an exhaust gas neutralization device with a fan (43) and an exhaust gas hose (44); the exhaust pipe (41) is a quartz glass tube arranged at the upper end of the outer sleeve (2); the water inlet pipe (42) is arranged at a position close to the end of the exhaust pipe (41); and the exhaust gas hose (44) connects the exhaust pipe (41) and the exhaust gas neutralization device with a fan (43); The discharge pipe (5) is arranged at the bottom of the outer sleeve (2); the high-temperature gasified quartz sand flowing out of the discharge pipe of the gasification pipe (11) flows into the high-temperature quartz sand cooling device (7) from the discharge pipe (5) after being purged with the purified gas for gas sealing; The high-temperature quartz sand cooling device (7) utilizes a technology combining water cooling and air cooling to implement pollution-free cooling of the high-temperature quartz sand.

2. The high temperature gasified quartz sand flow control device according to claim 1, characterized in that: The gasification tube (11) is a cylindrical quartz glass tube with a feed tube arranged at the center of the top and a discharge tube arranged at the center of the bottom. The gasification tube (11) is provided with an air inlet pipe and an air outlet pipe. The heating device (12) is a high-temperature electric furnace arranged outside the gasification tube (11).

3. The high temperature gasified quartz sand flow control device according to claim 2, characterized in that: The outer sleeve (2) is a quartz glass tube having the same diameter as the vaporization tube (11) and is sleeved on the lower part of the vaporization tube (11); the discharge pipe of the vaporization tube (11) is located inside the outer sleeve (2).

4. The high temperature gasified quartz sand flow control device according to claim 3, characterized in that: The gate valve bottom plate (311) is a rectangular quartz glass plate, horizontally arranged below the discharge pipe of the gasification tube (11), and the narrow side of the rectangle is larger than the diameter of the discharge pipe of the gasification tube (11); the gate valve side plate (312) is a quartz glass plate vertically arranged on both sides of the long side of the gate valve bottom plate (311), the bottom end of the gate valve side plate (312) is connected to the gate valve bottom plate (311), and the upper end is connected to the gate valve hanging plate (313); the gate valve hanging plate (313) is a narrow strip of quartz glass sheet horizontally arranged on the inner side of the gate valve side plate (312), and the gate valve hanging plate (313) is connected to the gate valve bottom plate (311). The long side of one side of the gate valve (313) is connected to the upper end of the gate valve side plate (312); the push-pull rod (314) is a quartz glass rod, the push-pull rod (314) is parallel to the long side of the gate valve bottom plate (311), one end of the push-pull rod (314) is connected to the center of the narrow side of the gate valve bottom plate (311), and the other end extends to the outside of the outer sleeve (2) and is connected to the handle (315); the handle (315) is a cross-shaped rod composed of a quartz glass rod or a circular plate made of a quartz glass plate, and the center of the cross-shaped rod or the circular plate is connected to the push-pull rod (314).

5. The high temperature gasified quartz sand flow control device according to claim 4, characterized in that: The support plate (32) is a rectangular quartz glass plate as a whole and is horizontally arranged on the discharge pipe of the vaporization tube (11). The height of the support plate (32) on the discharge pipe is subject to the height of the gate valve side plate (312), so that the gate valve (31) with a push-pull rod can be suspended on the support plate (32) through the gate valve hanging plate (313), and a certain gap is provided between the gate valve bottom plate (311) and the lower end of the discharge pipe of the vaporization tube (11). The width of the support plate (32) is subject to the width of the gate valve bottom plate (311), so that the gate valve (31) with a push-pull rod can be suspended on the support plate (32) through the gate valve hanging plate (313), and the discharge pipe of the vaporization tube (11) is located between the two gate valve side plates (312). The length of the support plate (32) is greater than twice the length of the gate valve bottom plate (311). 1) length, and baffles of a certain height are vertically arranged upward on the two narrow sides of the support plate (32), the air sealing device (33) comprises an air sealing tube (331) and an air inlet pipe (332), the air sealing tube (331) is parallelly sleeved on the push-pull rod (314), one end of the air sealing tube (331) is open and passes into the outer sleeve (2), the air sealing tube (331) is connected to the outer sleeve (2), and the other end is outside the outer sleeve (2) and is partially blocked by a quartz glass sheet, a circular hole larger than the diameter of the push-pull rod (314) is opened at a position slightly above the center of the blocking quartz glass sheet, so that there is a slight gap between the push-pull rod (314) and the glass sheet when the push-pull rod (314) passes through the blocking glass sheet, the air inlet pipe (332) is connected to the air sealing tube (331) from the outside of the outer sleeve (2), and provides the air sealing tube (331) with purified gas for air sealing.

6. A method for controlling the flow rate of high-temperature gasified quartz sand, using the high-temperature gasified quartz sand flow rate control device according to any one of claims 1 to 5, characterized in that: The specific control steps include the following: S1. The feed pipe of the high-temperature quartz sand cooling device (7) is arranged between the discharge pipe (5) and the baffle pipe (6); S2, connecting the exhaust gas neutralization device (43) with the fan to the exhaust pipe (41) using an exhaust gas hose (44); S3, opening the water supply valve of the cooling water source, supplying water to the water inlet pipe (42) on the exhaust pipe (41), supplying water to the exhaust gas neutralization device (43) with a fan, and supplying water to the high-temperature quartz sand cooling device (7); S4, opening the valve of the purified gas source to supply gas to the gas inlet pipe (332) of the gas sealing device (33) and to the high-temperature quartz sand cooling device (7); S5. Push the handle (315) of the gate valve (31) with the push-pull rod into the outer sleeve (2), so that the gate valve bottom plate (311) completely blocks the discharge pipe of the gasification pipe (11) of the high-temperature gasification device (1), and the quartz sand is high-temperature gasified and impurities are removed in the gasification pipe (11); S6, slowly pulling out the handle (315) to open the gate valve (31) with a push-pull rod below the discharge pipe of the gasification pipe (11); as the narrow side of the gate valve bottom plate (311) passes over the outer diameter of the discharge pipe of the gasification pipe (11) to reach the inner diameter, the quartz sand vaporized at high temperature after a period of time flows out of the gasification pipe (11) from the gap between the discharge pipe of the gasification pipe (11) and the gate valve bottom plate (311); as the gate valve (31) with a push-pull rod is pulled outward, the gate valve (31) with a push-pull rod is opened more, the gap between the gate valve bottom plate (311) and the discharge pipe of the gasification pipe (11) is larger, and the amount of quartz sand flowing out is larger; S7, adjusting the opening degree of the purge gas source valve so that the flow rate of the purge gas entering the air sealing tube (331) through the air inlet pipe (332) is large enough, so that the purge gas can prevent the high-activity gas trapped by the quartz sand from flowing into the environment from the gap between the push-pull rod (314) and the air sealing tube (331), and on the other hand, the purge gas can also enter the outer sleeve (2) through the open end of the air sealing tube (331) and purge the quartz sand from below the gate valve bottom plate (311), so that the high-activity gas trapped by the quartz sand is quickly separated from the quartz sand; S8, adjusting the fan flow rate of the exhaust gas neutralization device (43) with a fan so that the purified gas and the highly active gas in the outer casing (2) can be drawn out of the outer casing (2) in a timely manner, and the exhaust gas is discharged after being neutralized; S9. After gas-solid separation, the high-temperature quartz sand flows into the high-temperature quartz sand cooling device (7) through the discharge pipe (5) for cooling treatment.

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