Sintering device

Abstract

The utility model provides a sintering device. The sintering device comprises a sintering furnace, the sintering furnace comprises a sintering pipe, the sintering pipe is provided with at least two heating areas arranged at intervals in the axial direction of the sintering pipe, the temperatures of the at least two heating areas are gradually decreased or gradually increased in the axial direction of the sintering pipe, and the sintering pipe is provided with a feeding port and a discharging port; and the air supply device is used for conveying air to the inner cavity of the sintering pipe so as to form reciprocating airflow flowing in the axial direction of the sintering pipe in the inner cavity of the sintering pipe. According to the technical scheme, the sintering device can solve the problems that in the production process of nano-coated modified materials through existing sintering equipment, the heating time of the materials in a high-temperature area is long, the materials overgrow, and nanocrystallization is difficult to achieve.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a sintering device. Background Art

[0002] At present, the positive electrode materials of lithium-ion batteries mainly include lithium iron phosphate and nickel cobalt manganese oxide ternary materials. Since the positive electrode materials will have side reactions with the electrolyte during the operation of lithium-ion batteries, especially ternary materials, surface coating modification is required to reduce the contact area between the positive electrode materials and the electrolyte. In addition, in order to further improve the rate / power performance of lithium-ion battery positive electrode materials, coating modification is often also required. The key to coating modification is the selection of coating agent size. Nano-coating modified materials are not only conducive to their uniform dispersion, but also conducive to reducing the amount of coating agent used.

[0003] In the prior art, nano-coated modified materials are usually prepared by the method of "high-temperature static sintering + ball milling / air flow powder crushing". However, in the production process of nano-coated modified materials using existing sintering equipment, the material is heated in the high temperature zone for a long time, resulting in excessive growth of the material, making it difficult to achieve nano-crystallization. Utility Model Content

[0004] The main purpose of the utility model is to provide a sintering device, which can solve the problem that in the production process of nano-coated modified materials using existing sintering equipment, the material is heated for a long time in the high temperature zone, resulting in excessive growth of the material and difficulty in achieving nano-crystallization.

[0005] In order to achieve the above-mentioned purpose, a sintering device is provided, comprising: a sintering furnace, comprising a sintering tube, the sintering tube having at least two heating zones arranged at intervals along the axial direction of the sintering tube, along the axial direction of the sintering tube, the temperature of the at least two heating zones gradually decreases or gradually increases, and the sintering tube has a feed port and a discharge port; a gas supply device, used for conveying gas to the inner cavity of the sintering tube to form a reciprocating gas flow flowing along the axial direction of the sintering tube in the inner cavity of the sintering tube.

[0006] Furthermore, there are two heating zones, and the distance H between two adjacent heating zones ranges from 300mm to 1000mm; or, there are multiple heating zones, and the distance H between two adjacent heating zones ranges from 300mm to 1000mm, and the distance H between two adjacent heating zones gradually decreases in the direction away from the heating zone with the highest temperature.

[0007] Furthermore, the temperature range of the heating zone is 300°C to 750°C, there are two heating zones, and the temperature difference between two adjacent heating zones ranges from 280°C to 350°C; or, the temperature range of the heating zone is 300°C to 750°C, there are multiple heating zones, the temperature difference between two adjacent heating zones ranges from 100°C to 250°C, and the temperature difference between two adjacent heating zones gradually decreases in the direction away from the heating zone with the highest temperature.

[0008] Furthermore, both ends of the sintering tube are provided with air vents connected to the inner cavity, and the gas supply device includes a first gas supply unit and a second gas supply unit. The first gas supply unit introduces gas flowing in a first direction into the inner cavity through one of the air vents, and the second gas supply unit introduces gas flowing in a second direction into the inner cavity through the other air vent. The first direction is opposite to the second direction, and the first gas supply unit and the second gas supply unit work alternately.

[0009] Further, the sintering furnace also includes a first conveying pipeline, one end of the first conveying pipeline is connected to the exhaust end of the first gas supply unit, the other end of the first conveying pipeline is connected to any one of the two air vents, and the first conveying pipeline is provided with a pressure detection device; and / or, the first gas supply unit includes a second conveying pipeline and a first gas supply tank, one end of the second conveying pipeline is connected to the exhaust end of the first gas supply tank, the other end of the second conveying pipeline is connected to one of the two air vents, and the second conveying pipeline is provided with a first control valve, and the second gas supply unit includes a third conveying pipeline and a second gas supply tank, one end of the third conveying pipeline is connected to the exhaust end of the second gas supply tank, the other end of the third conveying pipeline is connected to the other of the two air vents, and the third conveying pipeline is provided with a second control valve.

[0010] Furthermore, the sintering device also includes an exhaust device, and a branch pipeline is arranged on the first conveying pipeline, one end of the branch pipeline is connected to the first conveying pipeline, and the other end of the branch pipeline is connected to the exhaust device.

[0011] Furthermore, the sintering device also includes a control system, and the first control valve and the second control valve are both communicatively connected to the control system.

[0012] Furthermore, the first gas supply tank and the second gas supply tank are filled with oxygen or compressed air.

[0013] Furthermore, filters are provided at both vents.

[0014] Furthermore, the sintering device also includes a vibration structure, which is arranged outside the sintering tube and is used to knock the sintering tube.

[0015] The technical solution of the utility model is applied, and a sintering tube and a gas supply device are provided. The gas supply device can deliver gas to the inner cavity of the sintering tube to form a reciprocating airflow flowing along the axial direction of the sintering tube in the inner cavity of the sintering tube. After the modified material enters the inner cavity of the sintering tube through the feed port, it is driven by the reciprocating airflow to make reciprocating motion in the inner cavity of the sintering tube. The modified material reciprocates between at least two heating zones, and the heating zones heat the modified material passing through. Along the axial direction of the sintering tube, the temperature of at least two heating zones gradually decreases or increases. With the reciprocating motion of the modified material, the crystallinity of the modified material can be improved under the high temperature heating of the heating zone, and the modified material can be prevented from being sintered for too long in the heating zone with a higher temperature, resulting in excessive growth of the modified material particles, thereby realizing the nano-crystallization of the modified material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] In the figure:

[0018] Figure 1 The schematic structural diagram of the sintering device according to the embodiment of the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Sintering furnace; 11. Sintering tube; 12. Heating zone; 20. First gas supply unit; 21. Second delivery pipeline; 22. First gas supply tank; 23. First control valve; 30. Second gas supply unit; 31. Third delivery pipeline; 32. Second gas supply tank; 33. Second control valve; 40. First delivery pipeline; 41. Branch pipeline; 50. Pressure detection device; 60. Pumping device; 61. Fourth delivery pipeline; 62. Third control valve; 70. Vibration structure. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] like Figure 1As shown, the utility model provides a sintering device, which includes: a sintering furnace 10, including a sintering tube 11, the sintering tube 11 has at least two heating zones 12 arranged at intervals along the axial direction of the sintering tube 11, along the axial direction of the sintering tube 11, the temperature of the at least two heating zones 12 gradually decreases or increases, and the sintering tube 11 has a feed port and a discharge port; a gas supply device, used to transport gas to the inner cavity of the sintering tube 11, so as to form a reciprocating airflow flowing along the axial direction of the sintering tube 11 in the inner cavity of the sintering tube 11.

[0023] In this embodiment, the modified material enters the inner cavity of the sintering tube 11 through the feed port, and under the drive of the reciprocating airflow, reciprocates in the inner cavity of the sintering tube 11, so that the modified material reciprocates between at least two heating zones 12, and the heating zone 12 heats the modified material passing through. Along the axial direction of the sintering tube 11, the temperature of at least two heating zones 12 gradually decreases or increases. With the reciprocating motion of the modified material, the crystallinity of the modified material can be improved under the high temperature heating of the heating zone 12, and the sintering time of the modified material in the heating zone 12 with a higher temperature can be avoided for too long, resulting in excessive growth of particles. Through the above-mentioned settings, dynamic sintering of the modified material can be achieved, the modified material is heated evenly, and the problem of excessive growth of modified material particles due to local heating of the modified material and excessive heating time in the high temperature zone is avoided, thereby achieving nano-sizing of the modified material.

[0024] In addition, since the modified material has a small particle size, the reciprocating airflow can prevent the modified material from being suspended in the sintering tube 11. At the same time, the reciprocating airflow can also blow down the particles attached to the inner wall of the sintering tube 11 to prevent the modified material particles from sticking to the wall and causing material loss.

[0025] In one embodiment, the sintering tube 11 is made of any one of quartz, stainless steel and corundum.

[0026] In one embodiment, the sintering furnace 10 is a vertical furnace, and the sintering furnace 10 also includes a refractory layer and a packaging layer, which are sequentially arranged on the outer periphery of the sintering tube 11, wherein the refractory layer is embedded with resistance wires and / or heating rods, and the packaging layer is a stainless steel packaging layer to reduce heat loss.

[0027] like Figure 1 As shown, in one embodiment of the present invention, there are two heating zones 12, and the distance H between two adjacent heating zones 12 ranges from 300 mm to 1000 mm.

[0028] Through the above arrangement, the modified material can be heated evenly, thus preventing the modified material from being heated in the heating zone 12 with a higher temperature for too long, which may lead to excessive growth of particles.

[0029] In one embodiment of the utility model, there are multiple heating zones 12, and the distance H between two adjacent heating zones 12 ranges from 300 mm to 1000 mm, and the distance H between two adjacent heating zones 12 gradually decreases in the direction away from the heating zone 12 with the highest temperature.

[0030] Through the above arrangement, the modified material can be heated evenly, thus preventing the modified material from being heated in the heating zone 12 with a higher temperature for too long, which may lead to excessive growth of particles.

[0031] In one embodiment, there are multiple heating zones 12, and the multiple heating zones 12 are arranged at equal intervals along the axial direction of the sintering tube 11, and the interval between two adjacent heating zones 12 ranges from 300 mm to 1000 mm.

[0032] Through the above arrangement, it is possible to avoid excessive particle growth caused by the modified material being heated in the heating zone 12 with a higher temperature for too long, and it is also possible to extend the time the modified material is heated in the low temperature zone, thereby improving the crystallinity of the modified material.

[0033] In one embodiment of the utility model, the temperature of the heating zone 12 ranges from 300°C to 750°C, there are two heating zones 12, and the temperature difference between two adjacent heating zones 12 ranges from 280°C to 350°C.

[0034] Through the above arrangement, the crystallinity of the modified material can be ensured, and excessive particle growth caused by the modified material being heated in the heating zone 12 at a relatively high temperature for too long can be avoided.

[0035] In one embodiment of the utility model, the temperature range of the heating zone 12 is 300°C to 750°C, there are multiple heating zones 12, the temperature difference between two adjacent heating zones 12 is in the range of 100°C to 250°C, and the temperature difference between two adjacent heating zones 12 gradually decreases in the direction away from the heating zone 12 with the highest temperature.

[0036] Through the above arrangement, the crystallinity of the modified material can be ensured, and excessive particle growth caused by the modified material being heated in the heating zone 12 at a relatively high temperature for too long can be avoided.

[0037] like Figure 1 As shown, in one embodiment of the utility model, both ends of the sintering tube 11 are provided with air vents connected to the inner cavity, and the gas supply device includes a first gas supply unit 20 and a second gas supply unit 30. The first gas supply unit 20 introduces gas flowing in a first direction into the inner cavity through one of the air vents, and the second gas supply unit 30 introduces gas flowing in a second direction into the inner cavity through another air vent. The first direction is opposite to the second direction, and the first gas supply unit 20 and the second gas supply unit 30 work alternately.

[0038] In this embodiment, the gas flowing in the first direction refers to the gas flowing from the side where the first gas supply unit 20 is located to the side where the second gas supply unit 30 is located along the axial direction of the sintering tube 11, and the gas flowing in the second direction refers to the gas flowing from the side where the second gas supply unit 30 is located to the side where the first gas supply unit 20 is located along the axial direction of the sintering tube 11. During the sintering process of the modified material, the first gas supply unit 20 and the second gas supply unit 30 work alternately, that is, when the first gas supply unit 20 introduces the gas flowing in the first direction into the inner cavity of the sintering tube 11, the second gas supply unit 30 does not work, at this time, the modified material moves with the gas to the side where the second gas supply unit 30 is located, and when the second gas supply unit 30 introduces the gas flowing in the second direction into the inner cavity of the sintering tube 11, the first gas supply unit 20 does not work, at this time, the modified material moves with the gas to the side where the first gas supply unit 20 is located. Through the above arrangement, an airflow that reciprocates along the axial direction can be formed in the inner cavity of the sintering tube 11 , thereby driving the modified material to reciprocate along the axial direction in the inner cavity of the sintering tube 11 .

[0039] like Figure 1 As shown, in one embodiment of the utility model, the sintering furnace 10 also includes a first conveying pipeline 40, one end of the first conveying pipeline 40 is connected to the exhaust end of the first air supply unit 20, and the other end of the first conveying pipeline 40 is connected to any one of the two air vents, and a pressure detection device 50 is arranged on the first conveying pipeline 40.

[0040] In this embodiment, the gas of the first gas supply unit 20 is transported to the inner cavity of the sintering tube 11 through the first delivery pipeline 40, and the pressure detection device 50 is used to detect the pressure of the inner cavity of the sintering tube 11 to avoid excessive gas introduction, which may cause excessive pressure in the inner cavity of the sintering tube 11.

[0041] In one embodiment, the pressure detection device 50 is a pressure gauge.

[0042] like Figure 1 As shown, in one embodiment of the utility model, the first air supply unit 20 includes a second delivery pipeline 21 and a first air supply tank 22, one end of the second delivery pipeline 21 is connected to the exhaust end of the first air supply tank 22, the other end of the second delivery pipeline 21 is connected to one of the two air vents, and the second delivery pipeline 21 is provided with a first control valve 23, and the second air supply unit 30 includes a third delivery pipeline 31 and a second air supply tank 32, one end of the third delivery pipeline 31 is connected to the exhaust end of the second air supply tank 32, the other end of the third delivery pipeline 31 is connected to the other of the two air vents, and the third delivery pipeline 31 is provided with a second control valve 33.

[0043] In this embodiment, the first gas supply tank 22 is used to store gas, and the gas in the first gas supply tank 22 is transported to the inner cavity of the sintering tube 11 through the second delivery pipeline 21, and the first control valve 23 is used to control the connection and disconnection between the second delivery pipeline 21 and the inner cavity of the sintering tube 11. The second gas supply tank 32 is used to store gas, and the gas in the second gas supply tank 32 is transported to the inner cavity of the sintering tube 11 through the third delivery pipeline 31, and the second control valve 33 is used to control the connection and disconnection between the third delivery pipeline 31 and the inner cavity of the sintering tube 11.

[0044] like Figure 1 As shown, in one embodiment of the utility model, one end of the second delivery pipeline 21 is connected to the exhaust end of the first gas supply tank 22, and the other end of the second delivery pipeline 21 is connected to the intake end of the first delivery pipeline 40. The gas in the first gas supply tank 22 is delivered to the inner cavity of the sintering tube 11 through the second delivery pipeline 21 and the first delivery pipeline 40.

[0045] like Figure 1 As shown, in one embodiment of the utility model, the sintering device also includes an exhaust device 60 , a branch pipeline 41 is provided on the first conveying pipeline 40 , one end of the branch pipeline 41 is connected to the first conveying pipeline 40 , and the other end of the branch pipeline 41 is connected to the exhaust device 60 .

[0046] Through the above arrangement, the gas in the inner cavity of the sintering tube 11 can be extracted, so that the inner cavity of the sintering tube 11 forms a vacuum state.

[0047] In one embodiment, the air extraction device 60 is a vacuum pump.

[0048] In one embodiment, the sintering device also includes a fourth conveying pipeline 61 and a third control valve 62. The third control valve 62 is installed on the fourth conveying pipeline 61. One end of the fourth conveying pipeline 61 is connected to the branch pipeline 41, and the other end of the fourth conveying pipeline 61 is connected to the exhaust end of the exhaust device 60. The third control valve 62 is used to control the connection and disconnection of the fourth conveying pipeline 61 and the branch pipeline 41.

[0049] In one embodiment, the sintering device further comprises a four-way pipe having four branch pipes connected at the first ends. Figure 1 The orientation of the sintering device is described in the figure, the second end of the branch pipe at the upper end is connected to the gas outlet end of the second conveying pipeline 21, the second end of the branch pipe at the left end is installed with a pressure detection device 50, the second end of the branch pipe at the right end is connected to the gas outlet end of the fourth conveying pipeline 61, and the second end of the branch pipe at the lower end is connected to one of the vents, that is, the four branch pipes are connected to the inner cavity of the sintering tube 11. When the exhaust device 60 is working, the gas in the inner cavity of the sintering tube 11 is exhausted, and the pressure detection device 50 is used to monitor the pressure change during the exhaust process.

[0050] In one embodiment, a three-way pneumatic ball valve is provided on the four-way pipe, and the three-way pneumatic ball valve can control the connection and disconnection between the branch pipe at the upper end, the branch pipe at the right end, and the branch pipe at the lower end.

[0051] In one embodiment of the present invention, the sintering device further includes a control system, and the first control valve 23 and the second control valve 33 are both communicatively connected to the control system.

[0052] In this embodiment, the opening and closing of the first control valve 23 and the second control valve 33 can be controlled by the control system without manual operation, thereby improving the automation level of the sintering device.

[0053] In one embodiment, the first control valve 23, the second control valve 33 and the third control valve 62 are all solenoid valves, and the first control valve 23, the second control valve 33 and the third control valve 62 are all communicatively connected to the control system, and the opening and closing of the first control valve 23, the second control valve 33 and the third control valve 62 are controlled by the control system.

[0054] In one embodiment of the present invention, the first gas supply tank 22 and the second gas supply tank 32 are filled with oxygen or compressed air.

[0055] In this embodiment, the first gas supply tank 22 and the second gas supply tank 32 are filled with oxygen or compressed air to enable the modified material to perform reciprocating motion.

[0056] In an embodiment of the utility model, filter screens are provided at both vents.

[0057] In this embodiment, filter screens are provided at both vents to prevent the modified material from overflowing from the vents during the reciprocating motion of the gas, thereby preventing the modified material from being lost.

[0058] like Figure 1 As shown, in one embodiment of the present invention, the sintering device further includes a vibration structure 70 , which is disposed outside the sintering tube 11 and is used to knock the sintering tube 11 .

[0059] In this embodiment, when the modified material moves back and forth with the gas, the vibration structure 70 strikes the sintering tube 11 , which can prevent the modified material from being attached to the inner wall of the sintering tube 11 during the reciprocating movement.

[0060] In one embodiment, the vibration structure 70 is a pneumatic hammer. The sintering device further includes a fourth control valve for controlling the opening and closing of the pneumatic hammer, the fourth control valve is communicatively connected to the control system, and the fourth control valve can be controlled to open and close by the control system, thereby controlling the opening and closing of the pneumatic hammer.

[0061] In one embodiment, the sintering device also includes a time controller and a time relay. Under the coordinated action of the time controller, the time relay and the control system, the opening and closing of the first control valve 23, the second control valve 33, the third control valve 62 and the fourth control valve are controlled, thereby controlling the gas supply device and the gas exhaust device 60 to work in an orderly manner to achieve dynamic sintering of the modified material.

[0062] From the above description, it can be seen that the above-mentioned embodiment of the utility model achieves the following technical effects: a sintering tube and a gas supply device are provided, and the gas supply device can deliver gas to the inner cavity of the sintering tube to form a reciprocating airflow flowing along the axial direction of the sintering tube in the inner cavity of the sintering tube. After the modified material enters the inner cavity of the sintering tube through the feed port, it is driven by the reciprocating airflow to make reciprocating motion in the inner cavity of the sintering tube. The modified material reciprocates between at least two heating zones, and the heating zone heats the modified material passing through. Along the axial direction of the sintering tube, the temperature of at least two heating zones gradually decreases or increases, and the reciprocating motion of the modified material can not only improve the crystallinity of the modified material under the high temperature heating of the heating zone, but also avoid the modified material from being sintered for too long in the heating zone with a higher temperature, resulting in excessive growth of the modified material particles, thereby realizing the nano-crystallization of the modified material.

[0063] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sintering device, characterized in that: include: A sintering furnace (10) comprises a sintering tube (11), wherein the sintering tube (11) has at least two heating zones (12) arranged at intervals along the axial direction of the sintering tube (11), and along the axial direction of the sintering tube (11), the temperature of at least the two heating zones (12) gradually decreases or gradually increases, and the sintering tube (11) has a feed port and a discharge port; A gas supply device is used to deliver gas to the inner cavity of the sintering tube (11) so as to form a reciprocating gas flow in the inner cavity of the sintering tube (11) that flows in the axial direction of the sintering tube (11).

2. The sintering device according to claim 1, characterized in that: There are two heating zones (12), and the distance H between two adjacent heating zones (12) ranges from 300 mm to 1000 mm; or, There are multiple heating zones (12), the distance H between two adjacent heating zones (12) ranges from 300 mm to 1000 mm, and the distance H between two adjacent heating zones (12) gradually decreases in a direction away from the heating zone (12) with the highest temperature.

3. The sintering device according to claim 1, characterized in that: The temperature of the heating zone (12) ranges from 300°C to 750°C, there are two heating zones (12), and the temperature difference between two adjacent heating zones (12) ranges from 280°C to 350°C; or, The temperature of the heating zone (12) ranges from 300°C to 750°C, there are multiple heating zones (12), the temperature difference between two adjacent heating zones (12) ranges from 100°C to 250°C, and the temperature difference between two adjacent heating zones (12) gradually decreases in a direction away from the heating zone (12) with the highest temperature.

4. The sintering device according to any one of claims 1 to 3, characterized in that: Both ends of the sintering tube (11) are provided with air vents connected to the inner cavity, and the gas supply device comprises a first gas supply unit (20) and a second gas supply unit (30), the first gas supply unit (20) introduces gas flowing in a first direction into the inner cavity through one of the air vents, and the second gas supply unit (30) introduces gas flowing in a second direction into the inner cavity through the other air vent, the first direction is opposite to the second direction, and the first gas supply unit (20) and the second gas supply unit (30) work alternately.

5. The sintering device according to claim 4, characterized in that: The sintering furnace (10) further comprises a first conveying pipeline (40), one end of the first conveying pipeline (40) being connected to the exhaust end of the first gas supply unit (20), the other end of the first conveying pipeline (40) being connected to any one of the two vents, and a pressure detection device (50) being provided on the first conveying pipeline (40); and / or the first gas supply unit (20) comprises a second conveying pipeline (21) and a first gas supply tank (22), one end of the second conveying pipeline (21) being connected to the exhaust end of the first gas supply tank (22), The second air supply unit (30) comprises a third air supply pipeline (31) and a second air supply tank (32), one end of the third air supply pipeline (31) being connected to the exhaust end of the second air supply tank (32), the other end of the third air supply pipeline (31) being connected to the other of the two air vents, the second air supply pipeline (21) being provided with a first control valve (23), the second air supply unit (30) comprising a third air supply pipeline (31) and a second air supply tank (32), one end of the third air supply pipeline (31) being connected to the exhaust end of the second air supply tank (32), the other end of the third air supply pipeline (31) being connected to the other of the two air vents, and the third air supply pipeline (31) being provided with a second control valve (33).

6. The sintering device according to claim 5, characterized in that: The sintering device further comprises an exhaust device (60); a branch pipeline (41) is provided on the first conveying pipeline (40); one end of the branch pipeline (41) is communicated with the first conveying pipeline (40); and the other end of the branch pipeline (41) is connected to the exhaust device (60).

7. The sintering device according to claim 5, characterized in that: The sintering device further comprises a control system, and the first control valve (23) and the second control valve (33) are both communicatively connected to the control system.

8. The sintering device according to claim 5, characterized in that: The first gas supply tank (22) and the second gas supply tank (32) contain oxygen or compressed air.

9. The sintering device according to claim 4, characterized in that: Filter screens are arranged at the two vents.

10. The sintering device according to any one of claims 1 to 3, characterized in that: The sintering device further comprises a vibration structure (70), wherein the vibration structure (70) is arranged outside the sintering tube (11) and is used to knock the sintering tube (11).

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