Quartz sand deep drying device

Abstract

The utility model discloses a deep drying device for quartz sand, and belongs to the field of quartz sand processing equipment. The bottom of the crushing device is provided with a stirring and drying device which is fixedly connected with the rack; a double-helix material turning device is rotatably connected in the stirring and drying device; the bottom of the stirring and drying device is provided with a heating mechanism; the tail part of the stirring and drying device is communicated with an air heat exchanger through an air outlet pipeline; a second pipeline exhaust fan is installed on the air outlet pipeline, a clean air outlet of the air heat exchanger is communicated with a waste heat recovery pipe, the other end of the waste heat recovery pipe is communicated with the middle of the smashing device, and a first pipeline exhaust fan is installed on the waste heat recovery pipe. According to the stirring and drying device disclosed by the utility model, the double-helix material turning device is arranged in the stirring and drying device, and quartz sand at the bottom can be stirred out by the double-helix material turning device, so that all the quartz sand can be subjected to sufficient heat exchange with hot air, and rapid and deep drying treatment of the quartz sand is realized.

Description

Technical Field

[0001] This utility model belongs to the field of quartz sand processing equipment, and more specifically, it relates to a quartz sand deep drying device. Background Technology

[0002] Quartz sand is an important industrial mineral raw material with a wide range of applications. Quartz sand typically requires drying before use. Wet quartz sand is prone to agglomeration. When quartz sand particles absorb moisture, they attract each other through the surface tension of water molecules, forming aggregates. This alters the original particle size distribution of the quartz sand. Drying effectively prevents this agglomeration, ensuring that the particle size of the quartz sand meets specific industrial requirements.

[0003] Patent CN221570971U discloses a high-purity quartz sand drying device, comprising a frame, a crushing barrel fixedly welded to the frame via a fixing bracket, a rotating shaft connected to the output shaft of a micro motor via a coupling and disposed inside the crushing barrel, several crushing blades fixedly welded to the outside of the rotating shaft, a material leakage hole on the surface of the crushing barrel, a drying barrel body rotatably connected to the outside of the crushing barrel via a coupling, a stirring blade fixedly welded to one end of the inner side of the drying barrel body, and a heating block fixedly welded to the inner side of the drying barrel body. This device, by setting up the crushing barrel, cuts and crushes the quartz sand, which falls into the drying barrel. Through the interaction between the crushing barrel and the stirring blades, the quartz sand inside the drying barrel can be dried, resulting in a good drying effect.

[0004] Although the above-mentioned device solves the problem of quartz sand drying, the following problems still exist: 1. The steam after drying has high heat energy, and direct discharge leads to serious heat waste; 2. Quartz sand is easily squeezed to the bottom of the drying barrel under the action of gravity, and the drying is carried out by turning the drying barrel, which leads to uneven turning and low quartz sand drying efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a deep drying device for quartz sand. The device has a turning and drying device at the bottom of the crushing device, and a double spiral turner is installed in the turning and drying device. The double spiral turner can turn out the quartz sand at the bottom, which speeds up the turning efficiency of the quartz sand and allows all the quartz sand to fully exchange heat with the hot air, thereby realizing the rapid deep drying treatment of quartz sand.

[0006] The aforementioned quartz sand deep drying device includes a frame, on which a crushing device is fixedly connected. Two sets of opposing crushing rollers are rotatably connected within the crushing device. A turning and drying device, fixedly connected to the frame, is located at the bottom of the crushing device. A rectangular discharge pipe, communicating with the turning and drying device, is located at the bottom of the crushing device. A discharge adjustment mechanism is located within the rectangular discharge pipe. A double-spiral turner is rotatably connected within the turning and drying device. A heating mechanism is located at the bottom of the turning and drying device. An air heat exchanger is connected to the tail end of the turning and drying device via an air outlet pipe. A second pipe exhaust fan is installed on the air outlet pipe. The clean air outlet of the air heat exchanger is connected to a waste heat recovery pipe. The other end of the waste heat recovery pipe is connected to the middle of the crushing device. A first pipe exhaust fan is installed on the waste heat recovery pipe.

[0007] Preferably, the crushing device includes a crushing box, a sealing cover is fixedly connected to the upper part of the crushing box, a feeding mechanism is connected to the sealing cover, a cover plate is rotatably connected to one side of the top of the feeding mechanism, a filter screen is fixedly connected inside the crushing box, the filter screen is fixedly connected to the side wall of the crushing box on all four sides, and the bottom of the filter screen cooperates with two crushing rollers.

[0008] Preferably, the crushing roller includes a rotating shaft, with both ends of the rotating shaft rotatably connected to the crushing box. A roller body is fixed on the rotating shaft, and multiple sets of crushing block groups are evenly distributed on the outer peripheral wall of the roller body. Each set of crushing block groups includes multiple evenly distributed crushing blocks. A scraper plate that cooperates with the side wall of the filter screen is provided between adjacent crushing block groups. The scraper plate and the crushing block group are arranged along the axial direction of the roller body.

[0009] Preferably, a drive mechanism for driving the crushing roller and the double helix turning material is fixedly connected to the frame. The output end of the drive mechanism is connected to the shaft of one of the crushing rollers through a coupling. A drive wheel is fixedly connected to the shaft of the other crushing roller, and a driven wheel is fixedly connected to the shaft of the other crushing roller. Both the drive wheel and the driven wheel are gears, and the drive wheel meshes with the driven wheel.

[0010] Preferably, a small transmission wheel is fixedly connected to the end of any of the rotating shafts away from the drive mechanism, and a large transmission wheel is fixedly connected to the double spiral material turner. The large transmission wheel and the small transmission wheel are connected by a transmission assembly.

[0011] Preferably, the discharge adjustment mechanism includes a discharge plate and at least one cylinder. The cylinder is fixedly connected to the frame, and the extended end of the cylinder is connected to the discharge plate. An adjustment groove that cooperates with the discharge plate is opened on the rectangular discharge pipe. Limiting blocks are respectively provided at the upper and lower ends of the adjustment groove. The limiting blocks are fixedly connected to the inner wall of the rectangular discharge pipe, and the two limiting blocks provided at the upper and lower ends cooperate with the upper and lower end faces of the discharge plate, respectively.

[0012] Preferably, the turning and drying device includes an inner turning chamber and an outer turning chamber. The longitudinal section of the inner turning chamber is U-shaped. The bottom of the inner turning chamber is in contact with the stirring blades of the double spiral turning device. The heating mechanism is located at the bottom of the inner turning chamber. There is a gap between the outer turning chamber and the heating mechanism. The outer turning chamber includes an inner shell and an outer shell. An insulation layer is filled between the outer shell and the inner shell.

[0013] Preferably, the heating mechanism includes multiple evenly distributed heating rods, and side plates are fixedly connected to both ends of the stirring inner box, with the two ends of the heating rods connected to the side plates respectively.

[0014] Preferably, the top of the turning and drying device is sealed with a box cover, the bottom of the rectangular discharge pipe is connected to the box cover, one end of the box cover is provided with an air inlet, an air filter is fixedly connected inside the air inlet, and the end of the turning box away from the air inlet is connected to the air outlet pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. A turning and drying device is installed at the bottom of the crushing unit. The crushing unit uses two relatively rotating crushing rollers with filter screens at the bottom of the two crushing rollers to fully crush the quartz sand, which facilitates the subsequent deep drying of the quartz sand. The crushing rollers can crush large pieces of quartz sand into smaller pieces, and the crushed pieces on the crushing rollers can further compress and crush the quartz sand. Quartz sand that meets the requirements can pass directly through the filter screen, while larger quartz sand particles will be crushed again as the scraper rotates until they are crushed to the required size.

[0017] 2. The turning and drying device is equipped with a double spiral turner, which can turn the quartz sand at the bottom out, speeding up the turning efficiency of the quartz sand and allowing all the quartz sand to fully exchange heat with the hot air, thus realizing the rapid and deep drying treatment of the quartz sand.

[0018] 3. Add an air heat exchanger so that the high-temperature steam after the quartz sand is dried can be recovered and reused. The clean air after heat exchange is also warm and can enter the turning and drying device with less cold air, thereby reducing energy consumption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the internal structure of the mixing and drying device and the pulverizing device;

[0022] Figure 4 This is a schematic diagram of the crushing roller structure;

[0023] Figure 5 This is a schematic diagram showing the coordination of the crushing device, the second duct exhaust fan, and the air heat exchanger.

[0024] Figure 6 This is a schematic diagram showing the connection between the pulverizing chamber and the filter screen.

[0025] Figure 7 This is a schematic diagram of the external structure of the crushing device;

[0026] Figure 8 for Figure 7 A magnified view of part A in the middle;

[0027] Figure 9 This is a schematic diagram showing the coordination between the inner mixing chamber and the outer mixing chamber.

[0028] In the diagram, 1. Tumbling and drying device; 101. Tumbling inner box; 102. Heating rod; 103. Air inlet; 104. Inner shell; 105. Insulation layer; 106. Outer shell; 2. Crushing device; 201. Crushing box; 202. Filter screen; 203. Rectangular discharge pipe; 204. Adjustment trough; 3. Feeding mechanism; 301. Cover plate; 4. Drive mechanism; 401. Drive wheel; 402. Driven wheel; 40 3. Small transmission wheel; 404. Large transmission wheel; 5. Discharge adjustment mechanism; 501. Discharge plate; 502. Limit block; 503. Cylinder; 6. Air heat exchanger; 7. Waste heat recovery pipe; 8. First pipeline exhaust fan; 9. Filter; 10. Second pipeline exhaust fan; 11. Crushing roller; 1101. Rotating shaft; 1102. Roller body; 1103. Crushed block; 1104. Scraper; 12. Double spiral turning device. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] like Figures 1 to 9As shown, a deep drying device for quartz sand includes a frame, on which a crushing device 2 is fixedly connected. Two sets of opposing crushing rollers 11 are rotatably connected within the crushing device 2. The crushing device 2, through the two opposing crushing rollers 11, can fully crush the quartz sand, facilitating subsequent deep drying. A turning and drying device 1, fixedly connected to the frame, is located at the bottom of the crushing device 2. A discharge port with a discharge valve is located at one end of the bottom of the turning and drying device 1. A rectangular discharge pipe 203, communicating with the turning and drying device 1, is located at the bottom of the crushing device 2. A discharge adjustment mechanism 5 is located within the rectangular discharge pipe 203, which is positioned in the middle of the turning and drying device 1.

[0032] A double-spiral turner 12 is rotatably connected inside the turning and drying device 1. The double-spiral turner 12 accelerates the turning efficiency of the quartz sand and enables thorough turning, thereby achieving rapid and deep drying of the quartz sand. A heating mechanism is provided at the bottom of the turning and drying device 1 to heat the inside of the device, thereby assisting in the drying of the quartz sand. The tail of the turning and drying device 1 is connected to an air heat exchanger 6 through an air outlet pipe. A second pipe exhaust fan 10 is installed on the air outlet pipe. The air heat exchanger 6 is preferably a gas-to-gas heat exchanger. The clean air outlet of the air heat exchanger 6 is connected to a waste heat recovery pipe 7. The other end of the waste heat recovery pipe 7 is connected to the middle of the crushing device 2. A first pipe exhaust fan 8 is installed on the waste heat recovery pipe 7.

[0033] The air heat exchanger 6 is existing technology, which allows the high-temperature steam after the quartz sand is dried to exchange heat with clean air. The clean air after heat exchange is then directed towards the quartz sand falling through the rectangular discharge pipe 203 for preliminary drying. The clean air after heat exchange is also heated, and its entry into the stirring and drying device 1 can reduce the entry of cold air, thereby reducing energy consumption.

[0034] The crushing device 2 includes a crushing chamber 201. A sealing cover is fixedly connected to the upper part of the crushing chamber 201. A feeding mechanism 3 is connected to the sealing cover. A cover plate 301 is rotatably connected to one side of the top of the feeding mechanism 3 via a hinge. The cover plate 301 closes the feed inlet of the feeding mechanism 3 during material crushing, thereby preventing dust from overflowing. Figure 6 As shown, a filter screen 202 is fixedly connected inside the crushing box 201. The filter screen 202 is fixedly connected to the side wall of the crushing box 201 on all four sides, and the bottom of the filter screen 202 cooperates with two crushing rollers 11. That is, the longitudinal section of the filter screen 202 is W-shaped, and the bottom of the filter screen 202 is smoothly transitioned. The bottom of the crushing box 201 is inclined towards the rectangular discharge pipe 203, so that the filtered quartz sand can automatically slide into the rectangular discharge pipe 203 under the action of gravity.

[0035] like Figure 4As shown, the crushing roller 11 includes a rotating shaft 1101, with both ends of the rotating shaft 1101 extending out of the crushing box 201 and rotatably connected to the crushing box 201 via bearings. A roller body 1102 is fixed on the rotating shaft 1101, and multiple sets of crushing block groups are evenly distributed on the outer peripheral wall of the roller body 1102. Each set of crushing block groups includes multiple evenly distributed crushing blocks 1103. During the relative rotation of the two sets of crushing rollers 11, large pieces of quartz sand can be crushed into small pieces. The corresponding crushing blocks 1103 on the two sets of crushing rollers 11 cooperate to further compress and crush the quartz sand. A scraper plate 1104 is provided between adjacent crushing block groups and is attached to the side wall of the filter screen 202. The scraper plate 1104 and the crushing block groups are arranged along the axial direction of the roller body 1102. The scraper 1104 can move the quartz sand on the filter screen 202, so that the quartz sand that meets the requirements can pass through the filter screen 202 and fall into the bottom of the crushing box 201. The larger quartz sand particles are crushed again as the scraper 1104 rotates until they are crushed to the required size.

[0036] like Figure 1 and Figure 2 As shown, a drive mechanism 4 for driving the crushing roller 11 and the double-spiral turner 12 to rotate is fixedly connected to the frame. The drive mechanism 4 is preferably a geared motor. The output end of the drive mechanism 4 is connected to the rotating shaft 1101 of one of the crushing rollers 11 via a coupling. A drive wheel 401 is fixedly connected to the rotating shaft 1101 of the other crushing roller 11, and a driven wheel 402 is fixedly connected to the rotating shaft 1101 of the other crushing roller 11. Both the drive wheel 401 and the driven wheel 402 are gears, and the drive wheel 401 and the driven wheel 402 mesh with each other. When the drive mechanism 4 is started, the two crushing rollers 11 can be driven to rotate relative to each other through the drive wheel 401 and the driven wheel 402.

[0037] A small transmission wheel 403 is fixedly connected to the end of any rotating shaft 1101 away from the drive mechanism 4, and a large transmission wheel 404 is fixedly connected to the double spiral material turner 12. The large transmission wheel 404 and the small transmission wheel 403 are connected by a transmission assembly. In this embodiment, both the large transmission wheel 404 and the small transmission wheel 403 are pulleys, and the transmission assembly is a belt. The large transmission wheel 404 has a further deceleration function while performing transmission.

[0038] like Figure 7 and Figure 8As shown, the discharge adjustment mechanism 5 includes a discharge plate 501 and two cylinders 503. The cylinders 503 are fixedly connected to the frame, and their extended ends are movably connected to the discharge plate 501. An adjustment groove 204 is provided on the rectangular discharge pipe 203 to cooperate with the discharge plate 501. The discharge plate 501 is slidably disposed within the adjustment groove 204 to adjust the opening and closing of the rectangular discharge pipe 203 and the size of the discharge port. Limiting blocks 502 are respectively provided at the upper and lower ends of both sides of the adjustment groove 204. The limiting blocks 502 are fixedly connected to the inner wall of the rectangular discharge pipe 203, and the two limiting blocks 502 respectively cooperate with the upper and lower end faces of the discharge plate 501. During the sliding process of the discharge plate 501, the two limiting blocks 502 serve as guides.

[0039] like Figure 9 As shown, the turning and drying device 1 includes an inner turning chamber 101 and an outer turning chamber. The inner turning chamber 101 is fixedly installed inside the outer turning chamber. The longitudinal section of the inner turning chamber 101 is a U-shaped structure that opens outwards at the top. The bottom of the inner turning chamber 101 is in contact with the stirring blades of the double spiral turner 12. The heating mechanism is located at the bottom of the inner turning chamber 101. Specifically, the heating mechanism includes multiple evenly distributed heating rods 102. Side plates are fixedly connected to both ends of the inner turning chamber 101, and both ends of the heating rods 102 are connected to the side plates. A certain gap is provided between the outer turning chamber and the heating mechanism to prevent the heating rods 102 from contacting the outer turning chamber. The outer turning chamber includes an inner shell 104, and an outer shell 106 is provided outside the inner shell 104. An insulation layer 105 is filled between the outer shell 106 and the inner shell 104. The outer turning chamber has a heat preservation function, thereby effectively preventing heat loss inside the turning and drying device 1.

[0040] like Figure 7 As shown, the top of the turning and drying device 1 is sealed with a box cover. The bottom of the rectangular discharge pipe 203 is connected to the box cover. One end of the box cover is provided with an air inlet 103. The air inlet 103 can effectively maintain the air pressure balance inside the turning and drying device 1. An air filter screen is fixedly connected inside the air inlet 103. The air filter screen prevents impurities from entering the turning and drying device 1. The end of the turning inner box 101 away from the air inlet 103 is connected to the air outlet pipe, so that the turning and drying device 1 can take in air at the front and exhaust air at the rear, realizing gas circulation.

[0041] In use, the cover plate 301 is opened, and the quartz sand raw material is fed into the crushing box 201 through the feeding mechanism 3. The drive mechanism 4 is started, and the drive mechanism 4 drives the two crushing rollers 11 to rotate relative to each other through the meshing drive wheel 401 and driven wheel 402. During the rotation, the crushing rollers 11 crush large pieces of quartz sand into smaller pieces. Then, through the corresponding crushing blocks 1103 on the two sets of crushing rollers 11, the smaller pieces of quartz sand are further crushed. The crushed quartz sand particles fall into the bottom of the filter screen 202 under the action of gravity. When the crushing rollers 11 rotate, the scraper plate 1104 moves the quartz sand on the filter screen 202. Among them, the quartz sand particles that meet the requirements pass through the filter screen 202 and fall into the bottom of the crushing box 201, and enter the turning and drying device 1 through the rectangular discharge pipe 203 for drying. Another part of the larger quartz sand particles are lifted up with the rotation of the scraper plate 1104, and are crushed again until all the quartz sand raw materials are crushed to the qualified level.

[0042] Starting cylinder 503 adjusts the position of discharge plate 501, thereby controlling the discharge speed of crushing device 2. Inside crushing device 2, heating rod 102 is energized and heated. Double spiral turner 12 rotates under the transmission of small drive wheel 403 and large drive wheel 404. The stirring blades of double spiral turner 12 are tightly fitted with the bottom of the inner mixing chamber 101, which can fully stir up the quartz sand at the bottom, so that all the quartz sand can fully contact the hot air in the inner mixing chamber 101 for deep drying. After drying, high-temperature steam is generated in the inner mixing chamber 101. The first pipe exhaust fan 8 and the second pipe exhaust fan 10 are started. The second pipe exhaust fan 10 draws the high-temperature steam into the air heat exchanger 6. In the air heat exchanger 6, the high-temperature steam exchanges heat with clean air, thereby absorbing the heat of the high-temperature steam. The clean air after heat exchange is sent back into the inner mixing chamber 101 for heating and drying under the action of the first pipe exhaust fan 8. This can save energy. The high-temperature steam after heat exchange is discharged after being filtered by the filter 9 for dust removal. The deeply dried quartz sand is discharged through the discharge port.

[0043] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A deep drying device for quartz sand, comprising a frame, characterized in that: A crushing device (2) is fixedly connected to the frame. Two sets of crushing rollers (11) are rotatably connected inside the crushing device (2). A turning and drying device (1) is fixedly connected to the frame at the bottom of the crushing device (2). A rectangular discharge pipe (203) is connected to the turning and drying device (1) at the bottom of the crushing device (2). A discharge adjustment mechanism (5) is provided inside the rectangular discharge pipe (203). A double spiral turner (12) is rotatably connected inside the turning and drying device (1). A heating mechanism is provided at the bottom of the turning and drying device (1). An air heat exchanger (6) is connected to the tail of the turning and drying device (1) through an air outlet pipe. A second pipe exhaust fan (10) is installed on the air outlet pipe. The clean air outlet of the air heat exchanger (6) is connected to the waste heat recovery pipe (7). The other end of the waste heat recovery pipe (7) is connected to the middle of the crushing device (2). A first pipe exhaust fan (8) is installed on the waste heat recovery pipe (7).

2. The quartz sand deep drying device according to claim 1, characterized in that: The crushing device (2) includes a crushing box (201), a sealing cover is fixedly connected to the upper part of the crushing box (201), a feeding mechanism (3) is connected to the sealing cover, a cover plate (301) is rotatably connected to the top side of the feeding mechanism (3), a filter screen (202) is fixedly connected inside the crushing box (201), the four sides of the filter screen (202) are fixedly connected to the side wall of the crushing box (201), and the bottom of the filter screen (202) cooperates with two crushing rollers (11).

3. The quartz sand deep drying device according to claim 2, characterized in that: The crushing roller (11) includes a rotating shaft (1101), the two ends of which are rotatably connected to the crushing box (201). A roller body (1102) is fixed on the rotating shaft (1101). Multiple sets of crushing blocks are evenly distributed on the outer peripheral wall of the roller body (1102). Each set of crushing blocks includes multiple evenly distributed crushing blocks (1103). A scraper (1104) that cooperates with the side wall of the filter screen (202) is provided between adjacent sets of crushing blocks. The scraper (1104) and the crushing block sets are arranged along the axial direction of the roller body (1102).

4. The quartz sand deep drying device according to claim 3, characterized in that: The frame is fixedly connected to a drive mechanism (4) for driving the crushing roller (11) and the double spiral feeder (12) to rotate. The output end of the drive mechanism (4) is connected to the shaft (1101) of one of the crushing rollers (11) through a coupling. A drive wheel (401) is fixedly connected to the shaft (1101), and a driven wheel (402) is fixedly connected to the shaft (1101) of the other crushing roller (11). Both the drive wheel (401) and the driven wheel (402) are gears, and the drive wheel (401) meshes with the driven wheel (402).

5. The quartz sand deep drying device according to claim 4, characterized in that: A small transmission wheel (403) is fixedly connected to one end of any of the rotating shafts (1101) away from the drive mechanism (4), and a large transmission wheel (404) is fixedly connected to the double spiral material turner (12). The large transmission wheel (404) and the small transmission wheel (403) are connected by a transmission assembly.

6. The quartz sand deep drying device according to claim 1, characterized in that: The discharge adjustment mechanism (5) includes a discharge plate (501) and at least one cylinder (503). The cylinder (503) is fixedly connected to the frame, and the extended end of the cylinder (503) is connected to the discharge plate (501). An adjustment groove (204) that cooperates with the discharge plate (501) is provided on the rectangular discharge pipe (203). Limiting blocks (502) are provided at the upper and lower ends of both sides of the adjustment groove (204). The limiting blocks (502) are fixedly connected to the inner wall of the rectangular discharge pipe (203), and the two limiting blocks (502) provided at the upper and lower ends cooperate with the upper and lower end faces of the discharge plate (501).

7. The quartz sand deep drying device according to claim 1, characterized in that: The turning and drying device (1) includes a turning inner box (101) and a turning outer box. The longitudinal section of the turning inner box (101) is U-shaped. The bottom of the turning inner box (101) is in contact with the stirring blades of the double spiral turning device (12). The heating mechanism is located at the bottom of the turning inner box (101). There is a gap between the turning outer box and the heating mechanism. The turning outer box includes an inner shell (104). An outer shell (106) is provided outside the inner shell (104). An insulation layer (105) is filled between the outer shell (106) and the inner shell (104).

8. The quartz sand deep drying device according to claim 7, characterized in that: The heating mechanism includes multiple evenly distributed heating rods (102), and side plates are fixedly connected to both ends of the stirring inner box (101). The two ends of the heating rods (102) are connected to the side plates respectively.

9. A deep drying device for quartz sand according to claim 7, characterized in that: The top of the mixing and drying device (1) is sealed with a box cover, the bottom of the rectangular discharge pipe (203) is connected to the box cover, one end of the box cover is provided with an air inlet (103), an air filter is fixedly connected inside the air inlet (103), and the end of the mixing inner box (101) away from the air inlet (103) is connected to the air outlet pipe.

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