A graphite powder drying system

Abstract

The application provides a graphite powder drying system, which comprises a drying box body, a feeding hopper fixedly connected to the top of the drying box body, a distribution pipe fixedly connected to the drying box body and communicated with the feeding hopper, a plurality of distribution holes arranged on the distribution pipe, a receiving plate fixedly connected to the inner wall of the drying box body and located below the distribution pipe, the orthographic projections of all the distribution holes being located on the receiving plate, a communication pipe located in the drying box body and having an air inlet pipe and a discharge pipe fixedly connected to two ends of the communication pipe and penetrating through the drying box body, and an inlet-outlet assembly communicated with the communication pipe and the space above the receiving plate. The application solves the problems of the prior art, i.e., the moisture content is increased due to the re-watering during the material taking-out process and the drying efficiency is low due to the relative static state of the material during the drying process.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for graphite powder processing, and in particular to a graphite powder drying system. Background Technology

[0002] Graphite powder generally needs to be dried after processing for subsequent storage, or it may need to be dried after a period of storage (e.g., improper storage leading to moisture absorption and clumping). Current technology typically uses a drying oven, which generally includes a drying chamber with built-in heating elements or introduces hot air through external pipes. In operation, the material (graphite powder to be dried) is placed into the drying chamber on a tray, then the chamber is closed for drying. After a period of time, the powder is removed, and this process is repeated. However, in actual operation, the material may absorb moisture from the surrounding environment during removal, increasing its moisture content. Furthermore, the material remains stationary during the drying process, resulting in relatively low drying efficiency. Therefore, the overall drying efficiency is not improved. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a graphite powder drying system that solves the problems of increased moisture content due to reabsorption of water during material removal and low drying efficiency due to the relatively static state of the material during drying.

[0004] According to an embodiment of the present invention, a graphite powder drying system includes:

[0005] The drying chamber has a feed hopper fixedly connected to its top, and a feeding pipe connected to the feed hopper is also fixedly connected inside the drying chamber. The feeding pipe has several feeding holes.

[0006] The receiving plate is fixedly connected to the inner wall of the drying chamber and is located below the material distribution pipe. The orthographic projection of all material distribution holes is located on the receiving plate.

[0007] A connecting pipe is located inside the drying chamber and its two ends are respectively fixedly connected to an air inlet pipe and a material outlet pipe that penetrate the drying chamber.

[0008] The space above the inlet / outlet component, connecting pipe and receiving plate.

[0009] In the above embodiments, during operation, hot air is first introduced through the air inlet pipe (at this time, the discharge pipe is closed). The hot air is introduced into the space above the receiving plate through the inlet / outlet assembly. The material is introduced into the feeding hopper through the feeding pipe, and then falls onto the receiving plate through the feeding hole. Due to the blowing of the hot air, the material is turned over in the space above the receiving plate, thereby achieving drying. After a period of time, the air inlet pipe is closed and the discharge pipe is opened. The material is drawn into the connecting pipe through the inlet / outlet assembly by the exhaust fan connected to the discharge pipe, and then drawn out. After completion, the discharge pipe is closed and the air inlet pipe is opened to start the next round of operation. During the entire process, the material does not come into contact with the external environment when it is discharged, thereby reducing the chance of re-absorbing water. At the same time, the material is in a turning state, and the contact efficiency with the hot air is high, thereby improving the drying efficiency. Therefore, it solves the problem in the prior art that the material may re-absorb water during the material removal process, resulting in an increase in moisture content, and the material is relatively stationary during the drying process, resulting in low drying efficiency.

[0010] Furthermore, the inlet / outlet assembly includes a connecting hopper that is fixedly connected to and communicates with the connecting pipe, a receiving plate having an installation hole, the connecting pipe being located below the receiving plate and the upper end of the connecting hopper being fixedly connected to the receiving plate, the upper end of the connecting hopper also communicating with the installation hole and the upper end of the connecting hopper being covered by an orifice plate, the orifice plate having an inlet / outlet.

[0011] Furthermore, the inlet / outlet assembly also includes a connecting pipe fixedly connected to the orifice plate and extending vertically above the receiving plate, and an air outlet hood fixedly connected to and communicating with the upper end of the connecting pipe, the air outlet hood having a closed top surface and a number of air outlets provided on its bottom surface.

[0012] Furthermore, the air outlet hood includes an upwardly protruding arc-shaped outer shell, an inner shell located inside the outer shell, and several partitions fixedly connected between the inner shell and the outer shell, with adjacent partitions, the inner shell, and the outer shell forming an air outlet.

[0013] Furthermore, several vertical plates are fixedly connected to the receiving plate, and the vertical plates are also fixedly connected to the inner wall of the drying chamber. Inlet and outlet components are respectively provided between two adjacent vertical plates and between the drying chamber and the adjacent vertical plates.

[0014] Furthermore, several third holes are also provided on the vertical plate.

[0015] Furthermore, an exhaust pipe is fixedly connected to the drying chamber and communicates with the space above the receiving plate inside the drying chamber, and a filter screen is also installed at the connection between the exhaust pipe and the drying chamber.

[0016] Furthermore, the exhaust pipe extends upwards to the top of the drying chamber.

[0017] Furthermore, the material distribution pipe is arranged horizontally and its two ends are fixedly connected to the inner wall of the drying chamber. A material distribution spiral is also rotatably installed inside the material distribution pipe. An installation cylinder is fixedly connected to the lower end of the feed hopper and passes through the drying chamber and is fixedly connected to and communicates with the material distribution pipe. All material distribution holes are located on the lower half of the material distribution pipe.

[0018] Furthermore, the mounting cylinder is connected to the center of the top surface of the drying chamber, and a circular plate located directly below the mounting cylinder is fixedly connected inside the material distribution tube. The material distribution screw includes a first conveying screw and a second conveying screw that are rotatably connected to both sides of the circular plate. A first motor and a second motor that drive the first conveying screw and the second conveying screw are also fixedly connected outside the drying chamber. The first conveying screw and the second conveying screw include spiral plates with opposite rotation directions.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The inlet and outlet components can be set to introduce hot air or export materials, so that the materials are in a state of tumbling during the drying process, which improves the contact efficiency between the materials and hot air and thus improves the drying efficiency. At the same time, the materials do not come into contact with the external environment during the export process, thereby reducing the chance of reabsorption of water. This solves the problem in the prior art that the materials may reabsorb water during the removal process, resulting in increased moisture content, and that the relatively static state of the materials during the drying process leads to low drying efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 This is a bottom view of the air outlet hood structure according to an embodiment of the present invention;

[0023] Figure 3 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0024] Figure 4 for Figure 1 Enlarged schematic diagram of the local structure at point B;

[0025] Figure 5 for Figure 1 Enlarged schematic diagram of the local structure at point C;

[0026] In the above attached figures:

[0027] Drying chamber 1, feeding hopper 2, material distribution pipe 3, material distribution hole 4, receiving plate 5, connecting pipe 6, air inlet pipe 7, material outlet pipe 8, valve 9, connecting hopper 10, perforated plate 11, inlet and outlet 12, exhaust pipe 13, filter screen 14, air cap 15, ring plate 16, filter hole 17, drying cylinder 18, dried granules 19, first hole 20, second hole 21, mounting base 22, connecting pipe 23, air outlet hood 24, air outlet 25, outer shell 26, inner shell 27, partition plate 28, vertical plate 29, third hole 30, mounting cylinder 31, circular plate 32, first conveying screw 33, second conveying screw 34, first motor 35, second motor 36. Detailed Implementation

[0028] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] In an exemplary implementation, such as Figure 1 As shown, this embodiment provides a graphite powder drying system, which includes:

[0030] The drying chamber 1 has a feeding hopper 2 fixedly connected to its top. The drying chamber 1 also has a feeding pipe 3 fixedly connected to the feeding hopper 2. The feeding pipe 3 is provided with several feeding holes 4. The feeding hopper 2 is used to feed materials into the drying chamber 1. Specifically, the materials first enter the feeding pipe 3 and then are introduced into the drying chamber 1 through the feeding holes 4.

[0031] The receiving plate 5 is fixedly connected to the inner wall of the drying chamber 1 and is located below the material distribution pipe 3. All the orthographic projections of the material distribution holes 4 are located on the receiving plate 5. That is, the receiving plate 5 divides the drying chamber 1 into an upper chamber and a lower chamber. The material falls onto the receiving plate 5 after passing through the material distribution holes 4 and enters the upper chamber.

[0032] The connecting pipe 6 is located inside the drying chamber 1 and is fixedly connected at both ends to an air inlet pipe 7 and a material outlet pipe 8 that penetrate the drying chamber 1. Specifically, the connecting pipe 6 can be located in the lower chamber, and valves 9 are respectively installed on the air inlet pipe 7 and the material outlet pipe 8 to control their opening and closing individually.

[0033] The inlet and outlet assembly connects the connecting pipe 6 and the space above the receiving plate 5 (i.e., the upper chamber).

[0034] In the above embodiment, during operation, hot air is first introduced through the air inlet pipe 7 (at this time, the discharge pipe 8 is closed). The hot air is introduced into the space above the receiving plate 5 through the inlet and outlet components. The material is introduced into the material distribution pipe 3 through the feed hopper 2, and then falls onto the receiving plate 5 through the material distribution hole 4. Due to the blowing of the hot air, the material is turned over in the space above the receiving plate 5, thereby achieving drying. After a period of time, the air inlet pipe 7 is closed and the discharge pipe 8 is opened. The material is drawn into the connecting pipe 6 through the inlet and outlet components by the exhaust fan connected to the discharge pipe 8, and then drawn out. After completion, the discharge pipe 8 is closed and the air inlet pipe 7 is opened to carry out the next round of operation. During the entire process, the material does not come into contact with the external environment when it is discharged, thereby reducing the chance of re-absorbing water. At the same time, the material is in a turning state, and the contact efficiency with the hot air is high, thereby improving the drying efficiency. Therefore, it solves the problem in the prior art that the material may re-absorb water during the material removal process, resulting in an increase in moisture content and that the material is relatively stationary during the drying process, resulting in low drying efficiency.

[0035] In specific solutions, such as Figure 1 As shown by the middle arrow, the inlet arrow indicates the introduction of hot air (a hot air blower is connected in front of the air inlet pipe 7 to increase the hot air flow, not shown), and the outlet arrow indicates the direction of the exhaust fan's suction force when it is running (the exhaust fan is located behind the discharge pipe 8, not shown). A collection component is also connected behind the exhaust fan for collecting materials for storage (not shown). In this scheme, the introduction of hot air and the discharge of materials share the inlet / outlet components and the connecting pipe 6, and the discharge of materials uses wind power as the driving force, so the material discharge can be more thorough.

[0036] In a further exemplary scheme, such as Figure 1-4As shown, the inlet and outlet assembly includes a connecting hopper 10 fixedly connected to and communicating with the connecting pipe 6. The receiving plate 5 has mounting holes. The connecting pipe 6 is located below the receiving plate 5, and the upper end of the connecting hopper 10 is fixedly connected to the receiving plate 5. The upper end of the connecting hopper 10 also communicates with the mounting holes, and the upper end of the connecting hopper 10 is covered by a perforated plate 11, which has inlet and outlet 12. When hot air is introduced, the outlet pipe 8 is closed, and the hot air introduced by the inlet pipe 7 enters the connecting pipe 6, then the connecting hopper 10, and then passes through the inlet and outlet 12 at the upper end of the perforated plate 11 to the top of the receiving plate 5. Before the material is introduced, the hot air introduction is started. After the material is introduced, it falls and is blown by the hot air, thus causing the material to be in a state of tumbling within the drying chamber 1 above the receiving plate 5. The material comes into efficient contact with the hot air, thereby achieving efficient drying.More specifically, the drying chamber 1 is also fixedly connected to an exhaust pipe 13 that communicates with the space above the receiving plate 5 inside the drying chamber 1. A filter screen 14 is also installed at the connection between the exhaust pipe 13 and the drying chamber 1. The exhaust pipe 13 is used to discharge the airflow after drying, while the filter screen 14 is used to intercept materials to prevent them from entering the exhaust pipe 13 and being discharged with the airflow. More specifically, the exhaust pipe 13 extends upward to the top of the drying chamber 1, which can prevent the airflow from rushing out laterally and causing adverse effects on the operators. At the same time, an inverted wind cap 15 can be installed at the top of the exhaust pipe 13 to block external airflow. Impurities enter, and the bottom of the hood 15 is detachably connected to the exhaust pipe 13 via a ring plate 16 (e.g., threaded connection). The ring plate 16 is provided with filter holes 17 to allow airflow to pass through smoothly. At the same time, external airflow is introduced into the exhaust pipe 13 when the material is discharged. The filter holes 17 can block external impurities from entering, and can also be cleared when the next round of hot air is introduced (similarly, the filter screen 14 in the drying chamber 1 can also be cleared by the introduced external airflow when the material is discharged). In a further embodiment, a drying cylinder 18 is also provided inside the exhaust pipe 13, and the drying cylinder 18 is filled with drying agent. The upper end of the drying cylinder 18 extends into the air hood 15 and is provided with a first hole 20. The bottom of the drying cylinder 18 is provided with a second hole 21. When external airflow is introduced, it first passes through the ring plate 16 and then enters the drying cylinder 18 through the first hole 20. After being moistened by the dried particles 19, it enters the exhaust pipe 13 below through the second hole 21, thus avoiding the introduction of external airflow with high moisture content. During drying, the high-temperature airflow in the drying chamber 1 will also reverse and enter the drying cylinder 18 through the second hole 21 to dry the dried particles 19, and then remove the moisture (through the first hole 20 and the ring plate). The filter holes 17 on 16 allow the dried particles 19 to absorb moisture again in the next round. The dried particles 19 can be reused, such as moisture-absorbing silica gel particles, whose particle size is larger than the first hole 20 and the second hole 21, and will not leak out. In particular, in the early stage of drying, the airflow discharged through the exhaust pipe 13 will contain more moisture, which will decrease as time goes on. Therefore, the dried particles 19 may absorb moisture in the early stage, but will be dried in the later stage. At the same time, the air cap 15 and the exhaust pipe 13 are detachable, which also facilitates the replacement and maintenance of the drying cylinder 18 and the dried particles 19 inside it.More specifically, a mounting base 22 is fixedly connected to the inner top surface of the hood 15. The mounting base 22 has a threaded groove, and the upper end of the drying cylinder 18 is threaded into this groove. The top surface of the drying cylinder 18 is open and is completely closed by the mounting base 22. During installation, the drying cylinder 18 is first connected to the threaded groove (i.e., the mounting base 22), and then connected together with the hood 15 to the upper end of the exhaust pipe 13. Disassembly is performed by reversing the process. Specifically, a rotational clearance is provided between the drying cylinder 18 and the exhaust pipe 13 so that the drying cylinder 18 rotates with the hood 15 during installation without rotating relative to it, thus preventing it from disengaging from the mounting base 22. The drying cylinder 18 is then disassembled after the hood 15 is removed.

[0037] In a further exemplary scheme, such as Figure 1-3 As shown, the inlet / outlet assembly also includes a connecting pipe 23 fixedly connected to the perforated plate 11 and extending vertically above the receiving plate 5, and an air outlet hood 24 fixedly connected to and communicating with the upper end of the connecting pipe 23. The air outlet hood 24 has a closed top surface and several air outlets 25 on its bottom surface. Hot air can also enter through the connecting pipe 23 and then be guided into the higher-positioned air outlet hood 24, and then bend downwards and blown out through the air outlets 25. This can cooperate with the hot air blown upwards through the lower inlet / outlet 12 to make the material tumbling more intense, thereby achieving better drying efficiency. Furthermore, the number of connecting pipes 23 is less than the number of inlet / outlet 12, so the amount of hot air blown downwards is less than the amount of hot air blown upwards. Overall, the material still tumbles above the receiving plate 5, and the air outlets 25 are positioned higher and have hot air blowing through them. Therefore, the material will not enter the air outlet hood 24. More specifically, the air outlet hood 24 includes an arc-shaped outer shell 26 with an upward protrusion, an inner shell 27 located inside the outer shell 26, and several partitions 28 fixedly connected between the inner shell 27 and the outer shell 26. Adjacent partitions 28, the inner shell 27, and the outer shell 26 enclose an air outlet 25. The partitions 28 can be equidistantly arranged around each other, so that each air outlet 25 is the same size. The inner shell 27 is also an upwardly protruding arc shape, and the higher ends of each partition 28 are separated. After the hot air enters the air outlet hood 24, it is diverted downward and outward. The top surface of the arc-shaped inner shell 27 and the inner wall of the arc-shaped outer shell 26 allow the hot air to be blown outward in an umbrella-like structure with an upward and downward structure. This allows the material to come into full contact with the hot air together with the hot air blown upward, resulting in a better drying effect.

[0038] Furthermore, after drying, the air inlet pipe 7 is closed and the discharge pipe 8 is opened. The material falls onto the receiving plate 5 and is then sucked into the connecting hopper 10 through the inlet and outlet 12. At the same time, the air outlet hood 24 also generates suction to suck up some of the floating material that has not yet fallen onto the receiving plate 5, and then guides it into the connecting hopper 10, and then into the discharge pipe 8 through the connecting pipe 6, and finally out.

[0039] In a further exemplary scheme, such as Figure 1 , 3 As shown, several vertical plates 29 are fixedly connected to the receiving plate 5, and the vertical plates 29 are also fixedly connected to the inner wall of the drying chamber 1. Inlet and outlet components are respectively provided between two adjacent vertical plates 29 and between the drying chamber 1 and the adjacent vertical plates 29. Multiple drying areas are formed above the receiving plate 5 through the vertical plates 29. Each drying area has an air outlet 25 and an inlet and outlet 12, which makes the material drying working range wider and more uniform. After drying, the material falls into each area. Several third holes 30 are also provided on the partition plate 28. The material in each area can be sucked into the corresponding connecting hopper 10 by the corresponding inlet and outlet 12. A small amount of material can also move between adjacent areas through the third holes 30, so the discharge can be more uniform. The air outlet 25 at the higher position sucks in the material floating above each area, improving the discharge efficiency of floating material.

[0040] In a further exemplary scheme, such as Figure 1 , 5As shown, the material distribution pipe 3 is arranged horizontally and its two ends are fixedly connected to the inner wall of the drying chamber 1. A material distribution spiral is also rotatably installed inside the material distribution pipe 3. The lower end of the feed hopper 2 is fixedly connected to the mounting cylinder 31, which passes through the drying chamber 1 and is fixedly connected to and communicates with the material distribution pipe 3. All the material distribution holes 4 are set on the lower half of the material distribution pipe 3. In this way, when the material is discharged from the material distribution pipe 3, it is discharged from the bottom, which can prevent the material from accumulating on the top of the material distribution pipe 3. Material is introduced through the feed hopper 2, and then moves in the feeding tube 3 under the push of the feeding screw. During the movement, it falls downward into the drying chamber 1 below, and then comes into contact with hot air for drying. More specifically, the mounting cylinder 31 is connected to the center of the top surface of the drying chamber 1, and a circular plate 32 located directly below the mounting cylinder 31 is fixedly connected inside the feeding tube 3. The feeding screw includes a first conveying screw 33 and a second conveying screw 34 that are rotatably connected to both sides of the circular plate 32. A first motor 35 and a second motor 36 that drive the first conveying screw 33 and the second conveying screw 34 are fixedly connected to the outside of the drying chamber 1. The first conveying screw 33 and the second conveying screw 34 include spiral plates with opposite rotation directions, that is, when they are running, they can move in opposite directions. The material is pushed in the opposite direction (on the other hand, if the rotation direction is the same, the direction of pushing the material can be adjusted by the rotation direction of the first pneumatic motor 35 and the second motor 36, or the material can be pushed in the opposite direction). After the material is introduced into the feed hopper 2, it falls into the mounting cylinder 31 and then falls downwards and is divided into two sides of the distribution pipe 3 by the circular plate 32. Under the action of the first motor 35 and the second motor 36, the first conveying screw 33 and the second conveying screw 34 push the material to both sides respectively. During the pushing process, the material falls to the bottom through the lower distribution hole 4. At the same time, if the material clumps during the pushing process, it can be stirred and broken up by the first conveying screw 33 and the second conveying screw 34, and then falls through the distribution hole 4 into the space above the receiving plate 5 below.

Claims

1. A graphite powder drying system, characterized in that, include: A drying chamber, the top of which is fixedly connected to a feeding hopper, and a feeding pipe connected to the feeding hopper is also fixedly connected inside the drying chamber, the feeding pipe being provided with several feeding holes; A receiving plate is fixedly connected to the inner wall of the drying chamber and located below the material distribution pipe. The orthographic projection of all the material distribution holes is located on the receiving plate. A connecting pipe is located inside the drying chamber and its two ends are respectively fixedly connected to an air inlet pipe and a material outlet pipe that penetrate the drying chamber. An inlet / outlet assembly connects the upper space of the connecting pipe and the receiving plate. The assembly includes a connecting hopper fixedly connected to and communicating with the connecting pipe. The receiving plate has mounting holes. The connecting pipe is located below the receiving plate, and the upper end of the connecting hopper is fixedly connected to the receiving plate. The upper end of the connecting hopper also communicates with the mounting holes and is covered by a perforated plate with inlet and outlet ports. The assembly further includes a connecting pipe fixedly connected to the perforated plate and extending vertically above the receiving plate, and an air outlet fixedly connected to and communicating with the upper end of the connecting pipe. The hood has a closed top surface and several air outlets on its bottom surface; the hood includes an upwardly convex arc-shaped outer shell, an inner shell located inside the outer shell, and several partitions fixedly connected between the inner shell and the outer shell, with adjacent partitions, the inner shell, and the outer shell forming the air outlet; several vertical plates are also fixedly connected to the receiving plate, and the vertical plates are also fixedly connected to the inner wall of the drying chamber; the inlet / outlet components are respectively provided between adjacent vertical plates and between the drying chamber and the adjacent vertical plates; several third holes are also provided on the vertical plates.

2. The graphite powder drying system as described in claim 1, characterized in that, The drying chamber is also fixedly connected to an exhaust pipe that communicates with the space above the receiving plate inside the drying chamber, and a filter screen is provided at the connection between the exhaust pipe and the drying chamber.

3. The graphite powder drying system as described in claim 2, characterized in that, The exhaust pipe extends upwards above the drying chamber.

4. The graphite powder drying system as described in claim 1, characterized in that, The material distribution tube is arranged horizontally and its two ends are fixedly connected to the inner wall of the drying chamber. A material distribution spiral is also rotatably arranged inside the material distribution tube. An installation cylinder is fixedly connected to the lower end of the feed hopper and the installation cylinder is fixedly connected to the material distribution tube through the drying chamber and communicates with it. All the material distribution holes are arranged on the lower half of the material distribution tube.

5. The graphite powder drying system as described in claim 4, characterized in that, The mounting cylinder is connected to the center of the top surface of the drying chamber. A circular plate located directly below the mounting cylinder is also fixedly connected inside the material distribution tube. The material distribution spiral includes a first conveying spiral and a second conveying spiral that are rotatably connected to both sides of the circular plate. A first motor and a second motor that drive the first conveying spiral and the second conveying spiral are also fixedly connected outside the drying chamber. The first conveying spiral and the second conveying spiral include spiral plates with opposite rotation directions.

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