Calcination device and method for purifying quartz sand

Abstract

The invention belongs to the technical field of quartz sand purification, and discloses a calcining device and method for purifying quartz sand, the device comprises a calcining furnace, a controller and a stirring mechanism, and comprises a driving assembly and a stirring rod, a supporting rod is slidably mounted on the inner wall of the stirring rod, and a first round rod is arranged on the inner wall of the supporting rod in a sleeving manner; a connecting assembly for driving the stirring rod to move is arranged on the outer wall of the first round rod; a bidirectional screw rod is in threaded connection with the inner wall of the first round rod; the humidity monitoring mechanism comprises a humidity sensor and a supporting plate, and a cooling assembly and a collecting assembly are installed at the two ends of the supporting plate; when the supporting plate moves upwards, the collecting assembly collects gas, the cooling assembly cools the collecting assembly, and the humidity sensor monitors the content of water vapor in the gas at the safe temperature, so that the temperature increasing speed of the calcining furnace is controlled, and the situation that the calcining furnace is broken due to too high temperature or the efficiency is affected due to too low temperature is prevented. The problem that the efficiency of the purification process and the product quality cannot be considered at the same time due to limitation of an existing device in the aspect of water vapor monitoring is solved.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand purification, in particular to a calcining device and a method for purifying quartz sand. Background Art

[0002] Quartz sand is quartz particles made by crushing quartz stone. It is an important industrial mineral raw material and is widely used in glass, casting, ceramics and fireproof materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives, filter materials, etc. In order to improve the utilization rate of quartz sand, quartz sand must be calcined at high temperature to remove volatile components in quartz sand, including hydroxyl groups.

[0003] The Chinese patent disclosed "A quartz sand calcining control system" with application number 201821072385.2, includes a calcining furnace, the bottom of the calcining furnace is fixedly connected to a support leg, the inner wall of the calcining furnace is fixedly connected to a heating plate, the left side of the support leg is fixedly connected to a relay, the top of the calcining furnace is fixedly connected to a cylinder, the top of the calcining furnace is fixedly inlaid with a copper rod, the copper rod is located inside the cylinder, and the bottom of the copper rod passes through and extends to the inside of the calcining furnace, the top of the cylinder is fixedly connected to a box body, the inside of the box body is respectively fixedly connected to a temperature sensor and a wireless transmitter, and the wireless transmitter is located on the left side of the temperature sensor.

[0004] Although the patent can monitor the temperature in the quartz sand calcination and purification process in real time while protecting the temperature sensor, thereby improving the purification effect, it has certain limitations when dealing with hydroxyl groups on the surface of quartz sand and internal moisture. Specifically, the device cannot monitor the amount of water vapor during the calcination of quartz sand, so as to manually or automatically adjust the temperature increase rate. During the calcination process, if the temperature rises too quickly, hydroxyl groups and moisture will evaporate rapidly, which may cause bubbles or cracks to form, thereby affecting the structure of quartz sand and reducing the production and purification quality of quartz sand. On the contrary, if the temperature rises too slowly, the appearance of bubbles and cracks can be effectively avoided, but this will increase the energy consumption of quartz sand purification and limit production. Therefore, how to control the temperature increase rate during the calcination process to take into account both product quality and energy efficiency is still a problem that needs to be solved. Summary of the invention

[0005] The object of the present invention is to provide a calcining device and method for purifying quartz sand. The present invention solves the limitation of the existing device in water vapor monitoring, resulting in the problem that the efficiency of the purification process and the product quality cannot be taken into account at the same time.

[0006] To achieve the above object, the present invention provides the following technical solution: a calcining device for purifying quartz sand, comprising a calcining furnace and a controller, and further comprising: The stirring mechanism comprises a driving assembly and a stirring rod, a support rod is slidably mounted on the inner wall of the stirring rod, a first round rod is sleeved on the inner wall of the support rod, a connecting assembly for driving the stirring rod to move is arranged on the outer wall of the first round rod, a bidirectional screw rod is threadedly connected to the inner wall of the first round rod, and the lower end surface of the bidirectional screw rod is mounted on the supporting rod; the driving assembly drives the supporting rod to rotate, and the stirring rod and the bidirectional screw rod also rotate accordingly, the stirring rod stirs the quartz sand, and at the same time, the bidirectional screw rod drives the stirring rod to reciprocate up and down through the first round rod and the connecting assembly, thereby achieving uniform heating of the quartz sand and improving the purification efficiency; The humidity monitoring mechanism includes a humidity sensor and a support plate installed on the upper end surface of the first round rod, and a cooling component and a collecting component are installed at both ends of the support plate respectively; when the first round rod moves upward, it drives the support plate to move, and the support plate drives the collecting component to collect gas, and the cooling component cools the collecting component at this time. At this time, the humidity sensor monitors the water vapor content in the gas at a safe temperature, thereby controlling the temperature increase speed of the calcining furnace to prevent the temperature from being too fast to cause breakage or too slow to affect efficiency; The cooling assembly comprises a water tank, a first piston is slidably mounted on the inner wall of the water tank, and the outer wall of the water tank is respectively connected to a water tank and a water pipe; The collecting component comprises a cooling tank connected with a water pipe and a water tank, a pipeline is installed at the center of the cooling tank, and a second piston is slidably installed on the inner wall of the pipeline.

[0007] Preferably, the upper end surface of the calcining furnace is provided with a feed port and an exhaust port, and the lower end surface of the calcining furnace is provided with a discharge port.

[0008] Preferably, the driving assembly comprises a servo motor, and the servo motor is fixedly mounted on the lower end surface of the calcining furnace, and the output shaft of the servo motor passes through the calcining furnace and is fixedly connected to the support rod.

[0009] Preferably, the connecting assembly includes a support frame, which is rotatably connected to the first round rod, and a plurality of second round rods are installed on the lower end surface of the support frame. The lower end surface of the second round rods is fixedly connected to the stirring rod, and a scraper is installed on the lower end surface of the stirring rod.

[0010] Preferably, the cooling assembly further comprises a fourth round rod, both ends of which are respectively connected to the support plate and the first piston, and a one-way valve is symmetrically provided on the outer wall of the first piston.

[0011] Preferably, the collecting assembly further comprises a third round rod, the upper end surface of the third round rod is fixedly connected to the support plate, and a retaining ring is installed on the side of the third round rod away from the support plate.

[0012] Preferably, the first round rod is slidably connected to the calcining furnace.

[0013] Preferably, the pipeline is fixedly installed on the upper end surface of the calcining furnace, and the outer wall of the pipeline is provided with air holes.

[0014] Preferably, the calcination method for purifying quartz sand comprises the following steps: Step 1: The driving assembly and the calcining furnace are controlled by the controller. At this time, the driving assembly drives the support rod to rotate, and the support rod drives the bidirectional screw rod and the stirring rod to rotate. At this time, the bidirectional screw rod drives the first round rod to move up and down, and the first round rod drives the stirring rod to move up and down through the connecting assembly, thereby stirring the quartz sand to make it evenly heated and improve the efficiency of purification; Step 2: When the first round rod moves upward, it drives the first piston to rise in the water tank. The first piston squeezes the water in the water tank into the water tank. At the same time, the water in the cooling tank enters the water tank through the water pipe. At this time, the water in the water tank enters the cooling tank, thereby maintaining the flow in the cooling tank. Step 3: When the first round rod moves upward, it drives the second piston to rise in the pipe, and the gas in the calcining furnace will enter the pipe. At this time, due to the flow of water in the cooling tank, the pipe will be cooled down, so that the internal gas will drop to a safe temperature. Then the humidity sensor monitors the moisture in the gas at a safe temperature. When the value fluctuates greatly, the temperature increase rate is reduced; when the value fluctuates slightly, the temperature increase rate is increased, thereby ensuring the quality of quartz sand while improving the purification efficiency.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a stirring mechanism. When the servo motor rotates, it drives the support rod and the bidirectional screw rod to rotate. The support rod drives the stirring rod to rotate. The stirring rod drives the scraper to rotate to turn the quartz sand. At the same time, since the bidirectional screw rod is threadedly connected with the first round rod, the first round rod will reciprocate up and down in the support rod. The first round rod drives the support frame to move up and down. The support frame drives the stirring rod to move up and down through the second round rod, and further stirs the quartz sand evenly, so that it is evenly heated, and the purification efficiency is improved; 2. The present invention is provided with a cooling component and a collecting component. When the support plate rises, the fourth round rod and the third round rod are driven to rise. The fourth round rod drives the first piston to rise in the water tank. At the same time, the water in the water tank enters the cooling tank. The water in the cooling tank enters the water tank through the water pipe. The third round rod drives the second piston to rise in the pipeline. The gas in the calcining furnace will enter the pipeline. At this time, due to the flow of water in the cooling tank, the pipeline will be cooled down to reduce the internal gas to a safe temperature, ensuring that the humidity sensor monitors the moisture in the gas at a safe temperature. When the value fluctuates greatly, the feedback controller automatically or manually reduces the temperature increase speed of the calcining furnace to prevent the quartz sand from breaking. When the value fluctuates slightly, the feedback controller automatically or manually increases the temperature increase speed of the calcining furnace, thereby improving the purification efficiency while ensuring the quality of the quartz sand. 3. The present invention provides a baffle ring. When the gas is collected in the pipeline, the baffle ring seals the bottom of the pipeline to isolate the gas in the pipeline from the gas in the calcining furnace, thereby preventing the gas in the calcining furnace from affecting the gas in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Schematic diagram from another perspective; Figure 3 This is a schematic diagram of the interior of the calcining furnace of the present invention; Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 It is a cross-sectional view of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle.

[0017] In the figure: 1, calcining furnace; 2, supporting legs; 3, feeding port; 4, water tank; 5, discharging port; 6, servo motor; 7, supporting plate; 8, water tank; 9, first round rod; 10, supporting frame; 11, second round rod; 12, stirring rod; 13, scraper; 14, third round rod; 15, retaining ring; 16, humidity sensor; 17, cooling tank; 18, water pipe; 19, supporting rod; 20, two-way screw rod; 21, fourth round rod; 22, first piston; 23, one-way valve; 24, air vent; 25, pipeline; 26, second piston. DETAILED DESCRIPTION

[0018] See also Figures 1 to 6 The present invention provides a technical solution: a calcining device for purifying quartz sand, comprising a calcining furnace 1 and a controller, and further comprising: The stirring mechanism comprises a driving assembly and a stirring rod 12, wherein a support rod 19 is slidably mounted on the inner wall of the stirring rod 12, a first round rod 9 is sleeved on the inner wall of the support rod 19, a connecting assembly driving the stirring rod 12 to move is arranged on the outer wall of the first round rod 9, a bidirectional screw rod 20 is threadedly connected to the inner wall of the first round rod 9, and the lower end surface of the bidirectional screw rod 20 is mounted on the supporting rod 19; the driving assembly drives the supporting rod 19 to rotate, and the stirring rod 12 and the bidirectional screw rod 20 also rotate accordingly, the stirring rod 12 stirs the quartz sand, and at the same time, the bidirectional screw rod 20 drives the stirring rod 12 to reciprocate up and down through the first round rod 9 and the connecting assembly, thereby achieving uniform heating of the quartz sand and improving the purification efficiency; The humidity monitoring mechanism includes a humidity sensor 16 and a support plate 7 installed on the upper end surface of the first round rod 9, and a cooling component and a collecting component are installed at both ends of the support plate 7 respectively; when the first round rod 9 moves upward, it drives the support plate 7 to move, and the support plate 7 drives the collecting component to collect gas. At this time, the cooling component cools the collecting component. At this time, the humidity sensor 16 monitors the water vapor content in the gas at a safe temperature, thereby controlling the temperature increase speed of the calcining furnace 1 to prevent the temperature from being too fast to cause breakage or too slow to affect efficiency; The cooling assembly includes a water tank 8, a first piston 22 is slidably mounted on the inner wall of the water tank 8, and the outer wall of the water tank 8 is respectively connected to the water tank 4 and the water pipe 18; The collecting assembly includes a cooling tank 17 connected to the water pipe 18 and the water tank 4, a pipe 25 is installed at the center of the cooling tank 17, and a second piston 26 is slidably installed on the inner wall of the pipe 25; Further, such as Figure 1 As shown, the upper end surface of the calcining furnace 1 is equipped with a feed port 3 for loading quartz sand and an exhaust port for discharging waste gas generated during calcining of quartz sand, and the lower end surface of the calcining furnace 1 is equipped with a discharge port 5 for discharging purified quartz sand; Further, such as Figure 5 As shown, the driving assembly includes a servo motor 6, which is fixedly mounted on the lower end surface of the calcining furnace 1, and the output shaft of the servo motor 6 passes through the calcining furnace 1 and is fixedly connected to the support rod 19; the servo motor 6 rotates, driving the support rod 19 to rotate; Further, such as Figure 3 As shown, the connection assembly includes a support frame 10, the support frame 10 is rotatably connected to the first round rod 9, a plurality of second round rods 11 are installed on the lower end surface of the support frame 10, the lower end surface of the second round rod 11 is fixedly connected to the stirring rod 12, and a scraper 13 is installed on the lower end surface of the stirring rod 12; The scraper 13 can turn over the quartz sand to make it evenly heated; Further, such as Figure 3 As shown, the lower end surface of the stirring rod 12 is conical to prevent the quartz sand from getting stuck under the stirring rod 12 when descending; Further, such as Figure 6 As shown, the cooling assembly further includes a fourth round rod 21, the two ends of which are respectively connected to the support plate 7 and the first piston 22, and a one-way valve 23 is symmetrically provided on the outer wall of the first piston 22; When the fourth round rod 21 drives the first piston 22 to rise, the one-way valve 23 is closed, and the water in the water tank 8 is discharged into the water tank 4. When the fourth round rod 21 drives the first piston 22 to move downward, the one-way valve 23 is opened, and the first piston 22 does not squeeze the water in the water tank 8, and finally moves to the bottom of the water tank 8; Further, such as Figure 6 As shown, the collecting assembly further comprises a third round rod 14, the upper end surface of the third round rod 14 is fixedly connected to the support plate 7, and a retaining ring 15 is installed on the side of the third round rod 14 away from the support plate 7; The baffle ring 15 can isolate the calcining furnace 1 from the pipeline 25 to prevent the gas to be monitored in the pipeline 25 from being affected; Further, such as Figure 5 As shown, the first round rod 9 is slidably connected to the calcining furnace 1; Furthermore, the pipe 25 is fixedly mounted on the upper end surface of the calcining furnace 1, and an air hole 24 is opened on the outer wall of the pipe 25; When the second piston 26 rises, the gas in the pipeline 25 is discharged from the air vent 24; Further, such as Figure 1 As shown, the water tank 4 is installed on the upper end surface of the calcining furnace 1; Further, such as Figure 4 As shown, the humidity sensor 16 is fixedly mounted on the outer wall of the pipe 25; Further, such as Figure 2 As shown, a plurality of supporting legs 2 are installed on the lower end surface of the calcining furnace 1 .

[0019] In this embodiment, the calcination method for purifying quartz sand comprises the following steps: The first step: put the quartz sand to be purified into the calcining furnace 1 from the feed port 3. At this time, after the controller (not shown in the figure) is connected to an external power supply, the calcining furnace 1 and the servo motor 6 are controlled to work. When the servo motor 6 rotates, it drives the support rod 19 and the bidirectional screw rod 20 to rotate. The support rod 19 drives the stirring rod 12 to rotate. The stirring rod 12 drives the scraper 13 to rotate to turn the quartz sand; At the same time, since the bidirectional screw rod 20 is threadedly connected to the first round rod 9, the first round rod 9 will reciprocate up and down in the support rod 19, the first round rod 9 drives the support frame 10 to move up and down, and the support frame 10 drives the stirring rod 12 to move up and down through the second round rod 11, further stirring the quartz sand evenly, making it evenly heated, and improving the efficiency of purification; Step 2: When the first round rod 9 moves upward, it drives the support plate 7 to move upward. At this time, the support plate 7 drives the fourth round rod 21 and the third round rod 14 to rise. When the fourth round rod 21 rises, it drives the first piston 22 to rise in the water tank 8. At this time, the one-way valve 23 on the first piston 22 is closed, and the first piston 22 squeezes the water above into the water tank 4. At the same time, the water in the water tank 4 will enter the cooling tank 17. The water in the cooling tank 17 enters the water tank 8 through the water pipe 18 and is located below the first piston 22. Step 3: When the third round rod 14 rises, it drives the second piston 26 and the retaining ring 15 to rise. The second piston 26 rises in the pipe 25, and the gas above is discharged from the air vent 24. The gas in the calcining furnace 1 will enter the pipe 25. At this time, due to the flow of water in the cooling tank 17, the pipe 25 will be cooled down to a safe temperature to prevent damage to the humidity sensor 16. When the third round rod 14 rises to the top, the retaining ring 15 closes the bottom of the pipe 25 to isolate the gas in the pipe 25 from the gas in the calcining furnace 1 to prevent the calcining. The gas in the calcining furnace 1 affects the gas in the pipeline 25, ensuring that the humidity sensor 16 monitors the moisture in the gas at a safe temperature. When the value fluctuates greatly, the feedback controller automatically or manually reduces the temperature increase speed of the calcining furnace 1 to prevent the quartz sand from breaking. When the value fluctuates slightly, the feedback controller automatically or manually increases the temperature increase speed of the calcining furnace 1, thereby ensuring the quality of the quartz sand while improving the purification efficiency and maximizing the benefits. After the purification is completed, the exhaust gas can be collected through the exhaust port, and then the quartz sand can be discharged through the discharge port 5; Furthermore, the numerical fluctuation value of the humidity sensor 16 is defined as the absolute difference between each detection value and the last detection value. When the difference is greater than the set threshold, it indicates that the water vapor content is high. On the contrary, when the difference is less than the threshold, it indicates that the water evaporation is relatively stable or the water vapor is basically removed.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A calcining device for purifying quartz sand, comprising a calcining furnace (1) and a controller, characterized in that: Also includes: The stirring mechanism comprises a driving component and a stirring rod (12); a support rod (19) is slidably mounted on the inner wall of the stirring rod (12); a first round rod (9) is sleeved on the inner wall of the support rod (19); a connecting component for driving the stirring rod (12) to move is arranged on the outer wall of the first round rod (9); a bidirectional screw rod (20) is threadedly connected to the inner wall of the first round rod (9); the lower end surface of the bidirectional screw rod (20) is mounted on the support rod (19); the driving component drives the support rod (19) to rotate, and the stirring rod (12) and the bidirectional screw rod (20) also rotate accordingly, the stirring rod (12) stirs the quartz sand, and at the same time, the bidirectional screw rod (20) drives the stirring rod (12) to move up and down through the first round rod (9) and the connecting component, thereby achieving uniform heating of the quartz sand and improving the purification efficiency; The humidity monitoring mechanism comprises a humidity sensor (16) and a support plate (7) mounted on the upper end surface of the first round rod (9), wherein the two ends of the support plate (7) are respectively mounted with a cooling component and a collecting component; when the first round rod (9) moves upward, the support plate (7) is driven to move, and the support plate (7) drives the collecting component to collect gas, and at this time the cooling component cools the collecting component, and at this time the humidity sensor (16) monitors the water vapor content in the gas at a safe temperature, thereby controlling the temperature increase speed of the calcining furnace (1) to prevent the temperature from increasing too fast to cause breakage or too slow to affect efficiency; A cooling assembly comprises a water tank (8), a first piston (22) being slidably mounted on the inner wall of the water tank (8), and an outer wall of the water tank (8) being respectively connected to a water box (4) and a water pipe (18); The collecting assembly comprises a cooling tank (17) connected to a water pipe (18) and a water tank (4), a pipe (25) being installed at the center of the cooling tank (17), and a second piston (26) being slidably installed on the inner wall of the pipe (25).

2. A calcining device for purifying quartz sand according to claim 1, characterized in that: The upper end surface of the calcining furnace (1) is provided with a feed port (3) and an exhaust port, and the lower end surface of the calcining furnace (1) is provided with a discharge port (5).

3. A calcining device for purifying quartz sand according to claim 1, characterized in that: The driving assembly comprises a servo motor (6), the servo motor (6) being fixedly mounted on the lower end surface of the calcining furnace (1), and the output shaft of the servo motor (6) passing through the calcining furnace (1) and being fixedly connected to the support rod (19).

4. A calcining device for purifying quartz sand according to claim 1, characterized in that: The connection assembly comprises a support frame (10), the support frame (10) being rotatably connected to the first round rod (9), a plurality of second round rods (11) being mounted on the lower end surface of the support frame (10), the lower end surface of the second round rods (11) being fixedly connected to the stirring rod (12), and a scraper (13) being mounted on the lower end surface of the stirring rod (12).

5. The calcining device for purifying quartz sand according to claim 1, characterized in that: The cooling assembly further comprises a fourth round rod (21), the two ends of the fourth round rod (21) being respectively connected to the support plate (7) and the first piston (22), and a one-way valve (23) is symmetrically provided on the outer wall of the first piston (22).

6. A calcining device for purifying quartz sand according to claim 1, characterized in that: The collecting assembly further comprises a third round rod (14), the upper end surface of the third round rod (14) being fixedly connected to the support plate (7), and a retaining ring (15) being installed on a side of the third round rod (14) away from the support plate (7).

7. A calcining device for purifying quartz sand according to claim 1, characterized in that: The first round rod (9) is slidably connected to the calcining furnace (1).

8. The calcining device for purifying quartz sand according to claim 1, characterized in that: The pipeline (25) is fixedly mounted on the upper end surface of the calcining furnace (1), and an air hole (24) is provided on the outer wall of the pipeline (25).

9. A calcining method for purifying quartz sand, using the calcining device for purifying quartz sand according to claim 1, characterized in that: The following steps are involved: The first step: controlling the driving assembly and the calcining furnace (1) to work through a controller, wherein the driving assembly drives the support rod (19) to rotate, and the support rod (19) drives the bidirectional screw rod (20) and the stirring rod (12) to rotate, and the bidirectional screw rod (20) drives the first round rod (9) to move up and down, and the first round rod (9) drives the stirring rod (12) to move up and down through the connecting assembly, thereby stirring the quartz sand, making it evenly heated, and improving the purification efficiency; Step 2: When the first round rod (9) moves upward, it drives the first piston (22) to rise in the water tank (8), and the first piston (22) squeezes the water in the water tank (8) into the water tank (4). At the same time, the water in the cooling tank (17) enters the water tank (8) through the water pipe (18). At this time, the water in the water tank (4) enters the cooling tank (17), thereby maintaining the flow in the cooling tank (17); Step 3: When the first round rod (9) moves upward, it drives the second piston (26) to rise in the pipe (25), and the gas in the calcining furnace (1) enters the pipe (25). At this time, due to the flow of water in the cooling tank (17), the pipe (25) is cooled down, so that the internal gas drops to a safe temperature. Then, the humidity sensor (16) monitors the moisture in the gas at a safe temperature. When the value fluctuates greatly, the temperature increase speed is reduced; when the value fluctuates slightly, the temperature increase speed is increased, so that the purification efficiency can be improved while ensuring the quality of the quartz sand.

Images