Three-stage chlorination refining furnace for quartz sand processing

Abstract

The application relates to the technical field of quartz sand processing equipment, and discloses a three-section chlorination purification furnace for quartz sand processing, which comprises a furnace body, a quartz sand conveying mechanism and a waste heat recovery assembly. The inside of the furnace body is provided with two heat insulation partitions. The inside of the furnace body is sequentially divided into a preheating section, a chlorination reaction section and a cooling section along the quartz sand conveying direction, and the three-section furnace cavities are separated through the heat insulation partitions. In the utility model, the granular aggregation is broken, and uniform heating is realized through the alternate cooperation and rotation of the spiral belt in the conveying pipe and the material stirring plate. Relying on the cooperation of the sectional furnace cavities and the spiral belt conveying, the quartz sand residence time in each section is accurately controlled, sufficient preheating, reaction and cooling are ensured, the metal impurities such as iron and aluminum are effectively removed, the purification is not incomplete, the high-purity quartz sand is stably produced, and the needs of the fields such as glass and ceramics are met.

Description

Technical Field

[0001] This application relates to the technical field of quartz sand processing equipment, and in particular to a three-stage chlorination purification furnace for quartz sand processing. Background Technology

[0002] Quartz sand, as an important industrial raw material, is widely used in glass, ceramics, electronics, photovoltaics and other fields. Purification is a key step in the processing of quartz sand. Among them, chlorination purification method has become one of the commonly used purification processes because it can effectively remove metal impurities such as iron, aluminum, calcium and magnesium from quartz sand. In existing horizontal quartz sand purification equipment, the quartz glass tube is a simple hollow cylindrical structure. During the rotation of the quartz glass tube, the quartz sand particles are subject to gravity and remain at the bottom of the tube, resulting in uneven heating and a short residence time within the tube, which affects the purification effect. Therefore, a three-stage chlorination purification furnace for quartz sand processing is proposed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a three-stage chlorination purification furnace for quartz sand processing, so as to solve the problems mentioned in the background art.

[0004] The technical solution provided in this application for a three-stage chlorination purification furnace for quartz sand processing is as follows: A three-stage chlorination purification furnace for quartz sand processing includes a furnace body, a quartz sand conveying mechanism, and a waste heat recovery component. The furnace body is equipped with two heat insulation partitions. The interior of the furnace body is divided into a preheating section, a chlorination reaction section, and a cooling section along the quartz sand conveying direction. The three furnace sections are separated by heat insulation partitions. The heat insulation partitions have channels for the quartz sand conveying mechanism to pass through. The quartz sand conveying mechanism includes a high-temperature resistant conveying pipe, a spiral belt, and a material-pushing plate. The two ends of the high-temperature resistant conveying pipe penetrate the furnace body and are rotatably connected to the two ends of the furnace body. Multiple spiral belts are fixedly connected inside the high-temperature resistant conveying pipe, and multiple material-pushing plates are arranged in a circumferential array at equal intervals on the inner wall of the high-temperature resistant conveying pipe.

[0005] Preferably, two guide wheels are rotatably connected to the outer walls of both ends of the furnace body, and multiple guide wheels are rollingly connected to the edges of both ends of the high-temperature resistant conveying pipe.

[0006] Preferably, a servo motor is fixedly installed on the outer wall of one end of the furnace body, and the output shaft of the servo motor is fixedly connected to the axis of one of the guide wheels.

[0007] Preferably, an electric heating wire is installed on the inner wall of the furnace body located inside the preheating section, and an electromagnetic heating coil is installed on the inner wall of the furnace body located inside the chlorination reaction section.

[0008] Preferably, the waste heat recovery assembly includes a heat-conducting plate, a cooling pipe, and an insulation plate. The heat-conducting plate and the insulation plate are disposed inside the furnace body in the cooling section and are wrapped around the outer wall of the high-temperature resistant conveying pipe. The cooling pipe is wound between the heat-conducting plate and the insulation plate, and both ends of the cooling pipe pass through the insulation plate and extend out of the furnace body.

[0009] Preferably, the waste heat recovery assembly further includes a water tank and a water pump. The water tank is fixedly connected to the outside of the furnace body, and the water pump is fixedly installed on the top outer wall of the water tank. Its suction end extends into the bottom inner cavity of the water tank, and its water delivery end is connected to one end of a cooling pipe. The other end of the cooling pipe is connected to the inner cavity of the water tank.

[0010] In summary, this application includes the following beneficial technical effects: This device breaks up particle aggregation and achieves uniform heating by alternating rotation and tumbling of the spiral belt and the material-pulling plate inside the conveying pipe. Relying on the synergy between the segmented furnace chamber and the spiral belt conveyor, it precisely controls the residence time of quartz sand in each segment to ensure sufficient preheating, reaction and cooling, and ultimately effectively removes metal impurities such as iron and aluminum, avoiding incomplete purification and ensuring a stable output of high-purity quartz sand to meet the needs of glass, ceramics and other fields. Attached Figure Description

[0011] Figure 1 This is an overall schematic diagram of an embodiment of the application; Figure 2 This is a schematic diagram of the interior of the furnace body in the embodiment of the application; Figure 3 This is a partial cross-sectional view of an embodiment of the application; Figure 4 This is an exploded schematic diagram of the high-temperature resistant conveying pipe in the embodiment of the application.

[0012] Explanation of reference numerals in the attached drawings: 1. Furnace body; 2. Insulating partition; 3. High-temperature resistant conveying pipe; 4. Spiral belt; 5. Feeding plate; 6. Guide wheel; 7. Servo motor; 8. Electric heating wire; 9. Electromagnetic heating coil; 10. Heat-conducting plate; 11. Cooling pipe; 12. Insulation board; 13. Water tank; 14. Water pump. Detailed Implementation

[0013] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0014] This application discloses a three-stage chlorination purification furnace for quartz sand processing. (Refer to...) Figure 1-4 A three-stage chlorination purification furnace for quartz sand processing includes a furnace body 1, a quartz sand conveying mechanism, and a waste heat recovery component. The furnace body 1 is a rectangular structure with openings at both ends. Two heat-insulating baffles 2 are fixedly installed inside the furnace body 1. The two heat-insulating baffles 2 are distributed at intervals along the axial direction of the furnace body 1, dividing the interior of the furnace body 1 into three independent chambers. Along the direction of quartz sand conveying, they are the preheating section, the chlorination reaction section and the cooling section. Each heat-insulating baffle 2 has a channel at its center. The size of the channel is adapted to the outer wall of the high-temperature resistant conveying pipe 3 in the quartz sand conveying mechanism, ensuring that the high-temperature resistant conveying pipe 3 can pass through smoothly and reducing heat exchange between the chambers.

[0015] The quartz sand conveying mechanism includes a high-temperature resistant conveying pipe 3, a spiral belt 4, and a material-pulling plate 5. The high-temperature resistant conveying pipe 3 is a tubular structure with open ends, which runs through the furnace body 1 along the axial direction of the furnace body 1. The two ends of the high-temperature resistant conveying pipe 3 are rotatably connected to the two ends of the furnace body 1 through bearings, so as to ensure that the high-temperature resistant conveying pipe 3 can rotate stably around its own axis. Multiple spiral strips 4 are fixedly connected to the inner wall of the high-temperature resistant conveying pipe 3 and are distributed at intervals along the axial direction of the high-temperature resistant conveying pipe 3. The edges of the spiral strips 4 are tightly attached to the inner wall of the high-temperature resistant conveying pipe 3 to push the quartz sand to move along the axial direction. Multiple material-pushing plates 5 are fixedly arranged on the inner wall of the high-temperature resistant conveying pipe 3, distributed in an equal circumferential array and arranged at equal intervals along the axial direction of the high-temperature resistant conveying pipe 3. At the same time, the material-pushing plates 5 and the spiral belt 4 are alternately arranged along the axial direction of the high-temperature resistant conveying pipe 3 to turn the material during the conveying of quartz sand and avoid material accumulation.

[0016] Two guide wheels 6 are rotatably connected to the outer walls of the furnace body 1 at both ends, corresponding to the positions of the high-temperature resistant conveying pipe 3. The two guide wheels 6 at the same end are symmetrically distributed about the axis of the high-temperature resistant conveying pipe 3, and the wheel surface of the guide wheel 6 rolls and fits against the outer wall edges at both ends of the high-temperature resistant conveying pipe 3, which supports and guides the rotation of the high-temperature resistant conveying pipe 3 and prevents it from deviating during the rotation.

[0017] A servo motor 7 is fixedly installed on the outer wall of one end of the furnace body 1. The output shaft of the servo motor 7 is fixedly connected to the shaft of one of the guide wheels 6 through a coupling to form a drive transmission structure. The servo motor 7 drives the guide wheel 6 to rotate, and then, with the help of the rolling cooperation between the guide wheel 6 and the high-temperature resistant conveying pipe 3, the high-temperature resistant conveying pipe 3 is driven to rotate around its own axis.

[0018] An electric heating wire 8 is fixedly installed on the inner wall of the furnace body 1 in the preheating section. The electric heating wire 8 maintains a certain distance from the outer wall of the high-temperature resistant conveying pipe 3 to avoid direct contact between the electric heating wire 8 and the high-temperature resistant conveying pipe 3, which could cause local overheating. An electromagnetic heating coil 9 is fixedly installed on the inner wall of the furnace body 1 in the chlorination reaction section. The electromagnetic heating coil 9 is coaxially arranged with the high-temperature conveying pipe 3. The inner diameter of the electromagnetic heating coil 9 is larger than the outer diameter of the high-temperature conveying pipe 3, and a heating gap is formed between them to ensure that the magnetic field generated by the electromagnetic heating coil 9 can be uniformly applied to the high-temperature conveying pipe 3 to achieve uniform heating of the quartz sand in the pipe.

[0019] The waste heat recovery assembly includes a heat-conducting plate 10, a cooling pipe 11, an insulation plate 12, a water tank 13, and a water pump 14. The heat-conducting plate 10 and the insulation plate 12 are both fixedly installed inside the cooling section of the furnace body 1. Both are annular structures and are adapted to the outer wall of the high-temperature resistant conveying pipe 3, together covering the outer wall of the high-temperature resistant conveying pipe 3. The inner side wall of the heat-conducting plate 10 is tightly attached to the outer wall of the high-temperature resistant conveying pipe 3 to quickly conduct the heat of the high-temperature resistant conveying pipe 3. The insulation plate 12 is fixed on the outer side wall of the heat-conducting plate 10 to reduce the loss of heat to the outside of the cooling section. The cooling pipe 11 is spirally wound between the heat-conducting plate 10 and the insulation plate 12. Both ends of the cooling pipe 11 pass through the insulation plate 12 radially and extend to the outside of the furnace body 1 to form a heat exchange channel. The water tank 13 is fixedly connected to the outside of the furnace body 1 by a bracket. The inside of the water tank 13 is used to store the heat transfer medium. The water pump 14 is fixedly installed on the top outer wall of the water tank 13 by bolts. The suction end of the water pump 14 extends to the bottom inner cavity of the water tank 13 through a water suction pipe. The water delivery end of the water pump 14 is connected to one end of the cooling pipe 11 through a water delivery pipe. The other end of the cooling pipe 11 is connected to the top inner cavity of the water tank 13 through a return water pipe, thus forming a closed heat transfer medium circulation loop.

[0020] The furnace body 1 is made of high-temperature resistant metal material, which has good structural strength and heat insulation performance and can withstand the working temperature of each section of the chamber. The high-temperature resistant conveying pipe 3 is made of quartz glass, which has the characteristics of high temperature resistance and corrosion resistance, thus avoiding secondary pollution of quartz sand during the conveying process; The heat insulation partition 2 is made of high-temperature resistant heat insulation material, which effectively blocks the heat transfer between the chambers and ensures the temperature stability of each section. Both the spiral belt 4 and the feeding plate 5 are made of high-temperature resistant metal material and have been treated with anti-corrosion to extend their service life. The heat-conducting plate 10 is made of a metal sheet with a high thermal conductivity to ensure rapid heat conduction; the insulation plate 12 is made of a material with excellent thermal insulation performance to reduce heat loss. Cooling pipe 11 is made of corrosion-resistant metal tubing to ensure that no leakage occurs during the circulation of heat transfer medium; water tank 13 is made of impact-resistant plastic material, which is lightweight and easy to observe the internal heat transfer medium storage.

[0021] The implementation principle of a three-stage chlorination purification furnace for quartz sand processing in this application embodiment is as follows: the electric heating wire 8 is started, the electric heating wire 8 generates heat and heats the preheating section of the furnace body 1, the heat is conducted to the high-temperature resistant conveying pipe 3 through the air, the quartz sand to be purified is put into one end of the high-temperature resistant conveying pipe 3, the servo motor 7 is started, the servo motor 7 drives the guide wheel 6 to rotate, and the guide wheel 6 drives the high-temperature resistant conveying pipe 3 to rotate around its own axis through rolling cooperation; During the rotation of the high-temperature resistant conveying pipe 3, the internal spiral belt 4 pushes the quartz sand to move along the axial direction, while the material feeding plate 5 flips the quartz sand, so that the quartz sand is evenly in contact with the inner wall of the high-temperature resistant conveying pipe 3 and fully absorbs heat to complete the preheating. The preheated quartz sand enters the chlorination reaction section of the furnace body 1 as the high-temperature resistant conveying pipe 3 rotates. The electromagnetic heating coil 9 is activated, and the electromagnetic heating coil 9 generates a magnetic field that acts on the high-temperature resistant conveying pipe 3, causing the high-temperature resistant conveying pipe 3 to heat up and transfer the heat to the internal quartz sand. In the chlorination reaction section, the quartz sand is continuously turned over by the feed plate 5 to ensure that the quartz sand is heated evenly and at the same time, it comes into full contact with the introduced chlorinating agent to undergo a chlorination reaction to remove impurities. Throughout the chlorination reaction process, the heat insulation partition 2 blocks the heat transfer between the preheating section and the cooling section, ensuring the temperature stability of the chlorination reaction section; The quartz sand that has completed the chlorination reaction enters the cooling section of the furnace body 1 as the high-temperature resistant conveying pipe 3 rotates. At this time, the heat carried by the high-temperature resistant conveying pipe 3 is transferred to the cooling pipe 11 through the heat-conducting plate 10. Start the water pump 14. The water pump 14 extracts the heat transfer medium in the water tank 13 and sends it into the cooling pipe 11 through the water supply pipe. The heat transfer medium absorbs heat during the flow in the cooling pipe 11 and then flows back to the water tank 13 through the return pipe to form a cycle. The heat absorbed by the cooling pipe 11 is carried back to the water tank 13 through the circulation of the heat transfer medium, and can be used for other subsequent processes that require heating, thus realizing waste heat recovery. The cooled quartz sand is pushed by the spiral belt 4 and discharged from the other end of the high-temperature conveying pipe 3, completing the entire purification process.

[0022] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A three-stage chlorination purification furnace for quartz sand processing, characterized in that: The furnace includes a furnace body (1), a quartz sand conveying mechanism and a waste heat recovery assembly. The furnace body (1) is equipped with two heat insulation partitions (2). The interior of the furnace body (1) is divided into a preheating section, a chlorination reaction section and a cooling section along the quartz sand conveying direction. The three furnace chambers are separated by heat insulation partitions (2). The heat insulation partitions (2) have channels for the quartz sand conveying mechanism to pass through. The quartz sand conveying mechanism includes a high-temperature resistant conveying pipe (3), a spiral belt (4), and a material-pushing plate (5). The two ends of the high-temperature resistant conveying pipe (3) penetrate the furnace body (1) and are rotatably connected to the two ends of the furnace body (1). Multiple spiral belts (4) are fixedly connected inside the high-temperature resistant conveying pipe (3), and multiple material-pushing plates (5) are arranged in a circumferential array at equal intervals on the inner wall of the high-temperature resistant conveying pipe (3).

2. The three-stage chlorination purification furnace for quartz sand processing according to claim 1, characterized in that: Two guide wheels (6) are rotatably connected to the outer walls of both ends of the furnace body (1), and multiple guide wheels (6) are rollingly connected to the edges of both ends of the high-temperature conveying pipe (3).

3. The three-stage chlorination purification furnace for quartz sand processing according to claim 2, characterized in that: A servo motor (7) is fixedly installed on the outer wall of one end of the furnace body (1), and the output shaft of the servo motor (7) is fixedly connected to the axis of one of the guide wheels (6).

4. The three-stage chlorination purification furnace for quartz sand processing according to claim 1, characterized in that: The furnace body (1) has an electric heating wire (8) installed on the inner wall inside the preheating section, and an electromagnetic heating coil (9) installed on the inner wall inside the chlorination reaction section.

5. A three-stage chlorination purification furnace for quartz sand processing according to claim 1, characterized in that: The waste heat recovery assembly includes a heat-conducting plate (10), a cooling pipe (11), and an insulation plate (12). The heat-conducting plate (10) and the insulation plate (12) are located inside the cooling section of the furnace body (1) and are wrapped around the outer wall of the high-temperature conveying pipe (3). The cooling pipe (11) is wound between the heat-conducting plate (10) and the insulation plate (12), and both ends of the cooling pipe pass through the insulation plate (12) and extend out of the furnace body (1).

6. A three-stage chlorination purification furnace for quartz sand processing according to claim 5, characterized in that: The waste heat recovery assembly also includes a water tank (13) and a water pump (14). The water tank (13) is fixedly connected to the outside of the furnace body (1). The water pump (14) is fixedly installed on the top outer wall of the water tank (13). Its suction end extends into the bottom inner cavity of the water tank (13), and its water delivery end is connected to one end of the cooling pipe (11). The other end of the cooling pipe (11) is connected to the inner cavity of the water tank (13).

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