Discharging apparatus of sintering furnace

Abstract

A discharging apparatus of a sintering furnace, comprising a bin (10), a transfer hopper (20), a first valve assembly (30), a first ventilation assembly (40), and a controller (80). The bin is connected to a main body of a sintering furnace. A feeding port (22), a discharging port (23), and a first ventilation port (252) are formed on the transfer hopper, and a feeding channel (21) is connected between the feeding port and the bin. The first valve assembly is arranged on the feeding channel so as to control the opening / closure of the feeding channel. The first ventilation assembly is connected to the first ventilation port, the first ventilation assembly outputs gas from the first ventilation port and delivers protective gas into the transfer hopper, and the protective gas is the same as protective gas in the main body. The controller is electrically connected to the first ventilation assembly and the first valve assembly, and when the transfer hopper has completed the transfer and the first valve assembly is closed, controls the first ventilation assembly to be opened.

Description

Discharging device of sintering furnace

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202410423391.1, filed on April 9, 2024, and Chinese Patent Application No. 202420728588.1, filed on April 9, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of sintering furnaces, in particular to a discharging device of a sintering furnace. BACKGROUND

[0004] Currently, lithium iron phosphate positive electrode material has become a most promising new generation of safe and environmentally friendly lithium ion power battery positive electrode material due to its high specific capacity, low price, no environmental pollution, good safety and thermal stability, and can be widely used in new energy vehicles, energy storage equipment, uninterruptible power supply, electric tools and other fields, and has a very broad market prospect.

[0005] At present, high-temperature solid-phase synthesis method is mostly selected for industrial production of lithium iron phosphate positive electrode material, that is, lithium salt, iron salt, phosphorus salt and other main raw materials and other additives are mixed uniformly according to the stoichiometric ratio, and then sintered after heating and holding to obtain LiFePO4 positive electrode material. Most of the existing large-scale production of lithium iron phosphate positive electrode material adopts roller kiln, push plate kiln and rotary kiln and other sintering equipment. In order to prevent oxidation of divalent iron during synthesis of lithium iron phosphate material and ensure the consistency of the product, the material is synthesized in a closed state, and a large amount of protective gas needs to be continuously introduced during the entire material production process to prevent oxidation of divalent iron during synthesis of lithium iron phosphate material and ensure the consistency of the product.

[0006] Based on the purpose of improving production capacity and reducing cost and increasing efficiency, the equipment size and its own weight are large, in order to ensure the installation stability and process stability, the overall structure, especially the layout and design of the discharging device, poses a challenge, and the discharging device of the sintering furnace has certain improvement space.

[0007] SUMMARY

[0008] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0009] To this end, the present disclosure aims to provide a discharging device of a sintering furnace, which can effectively prevent air backflow, ensure stable atmosphere in the sintering furnace, and ensure product quality.

[0010] The discharging device of the sintering furnace according to the embodiments of the present disclosure comprises a hopper, a sending hopper, a first valve assembly, a first air exchange assembly and a controller. The hopper is connected to the main body of the sintering furnace to collect the sintered material. The sending hopper has a feeding port, a discharging port and a first air exchange port. The feeding port is connected to the hopper through a feeding channel. The first valve assembly is arranged on the feeding channel to control the opening and closing of the feeding channel. The first air exchange assembly is connected to the first air exchange port. The first air exchange assembly outputs gas from the first air exchange port and sends protective gas into the sending hopper. The protective gas is the same as the protective gas in the main body. The controller is electrically connected to the first air exchange assembly and the first valve assembly to control the first air exchange assembly to open when the sending hopper finishes sending and the first valve assembly is closed.

[0011] The discharging device of the sintering furnace according to the embodiments of the present disclosure controls the communication state between the sending hopper and the hopper by arranging the first valve assembly on the feeding channel between the hopper and the feeding port of the sending hopper. When the sending hopper receives the material from the hopper, the first valve assembly is closed in time to reduce the possibility of residual air entering the sintering furnace through the feeding channel and entering the hopper, thereby avoiding the influence on the production process of the sintering furnace.

[0012] The first air exchange assembly is connected to the first air exchange port of the sending hopper to continuously send protective gas into the sending hopper, thereby effectively replacing the air in the sending hopper. In this way, the possibility of air entering the hopper in the opposite direction is avoided during the process of opening the first valve assembly and feeding the material from the hopper to the sending hopper, thereby avoiding the air entering the main body of the sintering furnace and maintaining the purity of the atmosphere in the sintering furnace.

[0013] The controller is arranged to control the first air exchange assembly and the first valve assembly. The controller helps to control the first air exchange assembly to open when the sending hopper finishes sending and the first valve assembly is closed, thereby improving the gas replacement efficiency of the discharging device.

[0014] Additional aspects and advantages of the present disclosure will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a structural schematic diagram of the discharging device according to some embodiments of the present disclosure;

[0016] FIG. 2 is a structural schematic diagram of the sending hopper according to some embodiments of the present disclosure;

[0017] FIG. 3 is a structural schematic diagram of the sending hopper according to some other embodiments of the present disclosure;

[0018] FIG. 4 is a structural schematic diagram of the discharging device according to some other embodiments of the present disclosure;

[0019] Fig. 5 is a schematic diagram of the position of the high-pressure air port in the delivery hopper in the present disclosure;

[0020] Fig. 6 is a schematic diagram of the position of the negative-pressure air port in the delivery hopper in the present disclosure.

[0021] Reference signs: discharge device 100, hopper 10, inlet 11, outlet 13, second air exchange port 14, delivery hopper 20, feeding channel 21, feeding inlet 22, discharge outlet 23, discharge channel 24, first air exchange port 25, first air exchange inlet 251, first air exchange outlet 252, air port 26, high-pressure air port 261, negative-pressure air port 262, first valve assembly 30, feeding valve 31, feeding first control valve 32, feeding second control valve 33, feeding third control valve 34, first air exchange assembly 40, air exchange main channel 41, first air exchange channel 42, first air filter 43, air exchange first control valve 44, air exchange second control valve 45, air inlet pipe 50, high-pressure main channel 51, branch channel 52, air pressure adjusting member 53, second valve assembly 60, second air exchange assembly 70, second air filter 71, air exchange fourth control valve 72, controller 80, dust removal system 90. DETAILED DESCRIPTION

[0022] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0023] A discharge device 100 according to an embodiment of the present disclosure is described below with reference to Figs. 1-6. The application field of the discharge device 100 is not limited, for example, it can be applied in a sintering furnace or other equipment that needs to use the discharge device 100.

[0024] It is worth noting that the sintering furnace of the present disclosure is used for sintering of lithium iron phosphate. The sintering process of lithium iron phosphate needs to be carried out in a protective atmosphere, and the protective gas needs to be continuously introduced into the interior of the sintering furnace, and the material produced after the completion of sintering still has a high temperature for a certain period of time, and is easy to be oxidized by oxygen in the air after contacting the air, iron changes from divalent to trivalent, generating iron oxide (Fe2O3) and lithium phosphate (Li3PO4), which affects the consistency of the product, and causes the capacity of lithium ion batteries to decay, the performance to decrease or even fail, and the cycle life to be affected. Therefore, the air needs to be strictly isolated before the lithium iron phosphate sintering is completely cooled to ensure the product quality.

[0025] In addition, due to the large size and weight of the sintering furnace equipment, it is not installed at a high height to ensure installation stability. After sintering, the materials are generally discharged by their own gravity. The material discharge device needs to be located lower than the main part of the sintering equipment, and some structures need to be set below the ground surface. In this case, compressed air is required to transport the materials to the storage bin. After transportation, the residual air may return through the rear end of the sintering furnace and enter the furnace from the rear end, affecting the inert gas atmosphere inside the furnace, causing the oxygen content to increase, which directly affects the sintering effect of the sintering furnace. Therefore, the discharge device and the rear end of the sintering furnace need to be sealed to prevent external air / compressed air from returning and entering the furnace from the rear end.

[0026] To solve the above problems, the present disclosure proposes a discharging device 100 .

[0027] According to an embodiment of the present disclosure, a discharging device 100, as shown in Figure 1, includes a silo 10 and a sending hopper 20. The silo 10 is used to be connected to the main body of the sintering furnace to collect the sintered materials.

[0028] The sending hopper 20 has a feed port 22 , and a feed channel 21 connected to the feed port 22 and the silo 10 is provided.

[0029] The sintered material can enter the feed channel 21 through the silo 10 .

[0030] As shown in Figure 1, the sending hopper 20 includes a feed port 22, a discharge port 23, and a first ventilation port 25. The feed port 22 allows the material to enter the sending hopper 20 smoothly, while the feed channel 21 connects the silo 10 and the sending hopper 20 to ensure smooth material transmission.

[0031] As shown in Figures 1-4, the discharge device 100 further includes a first valve assembly 30, which is disposed on the feed channel 21 and is used to control the on / off state of the feed channel 21. The first valve assembly 30 can precisely control the on / off state of the feed channel 21 during material transport. The first valve assembly 30 is opened when material needs to be fed from the silo 10 to the delivery hopper 20, and is closed when material does not need to be fed from the silo 10 to the delivery hopper 20.

[0032] In addition, the first valve assembly 30 also serves to isolate the flow of gas between the hopper 10 and the delivery hopper 20. After the material enters the delivery hopper 20, the first valve assembly 30 is closed, forming a tight barrier between the feed channel 21, ensuring that air in the delivery hopper 20 does not enter the hopper 10 through the feed channel 21, thereby preventing air from entering the sintering furnace body.

[0033] In the sintering process, the atmosphere in the furnace, such as the oxygen content in the furnace atmosphere, usually needs to be strictly controlled to avoid adverse effects on the material. If air accidentally enters the sintering furnace body, the oxygen content of the furnace atmosphere will rise, resulting in a decrease in the quality of the material or the production of unnecessary by-products. Therefore, it is crucial to maintain the purity of the furnace atmosphere.

[0034] Therefore, after the material in the delivery hopper 20 is delivered, the internal gas needs to be replaced before the next feeding to avoid backflow.

[0035] The discharge device 100 according to some embodiments of the present disclosure, the first valve assembly 30 at least includes a plurality of control valves arranged on the feeding channel 21.

[0036] As shown in FIG. 4, the plurality of control valves are respectively a feeding valve 31, a feeding first control valve 32, a feeding second control valve 33, and a feeding third control valve 34. The feeding first control valve 32 is located upstream of the feeding valve 31, and the feeding second control valve 33 and the feeding third control valve 34 are located downstream of the feeding valve 31.

[0037] The first valve assembly 30 improves the opening and closing control of the feeding channel 21, and realizes accurate control of the material flow.

[0038] For example, the feeding valve 31 adjusts the material flow in the feeding channel 21. When it is necessary to increase / decrease the material flow, the speed of the feeding valve 31 can be adjusted to achieve the purpose of increasing / decreasing the flow.

[0039] For another example, when it is necessary to start or stop the material delivery, the feeding first control valve 32, the feeding second control valve 33, and the feeding third control valve 34 can be opened or closed at the same time to realize the on-off of the feeding channel 21.

[0040] The above-mentioned first valve assembly 30 can effectively improve the air tightness of the feeding channel 21 without causing structural redundancy and controlling the cost, ensuring that the air remaining in the delivery hopper 20 after delivering the material cannot enter the bin 10 through the feeding channel 21, reducing the backflow of gas, and helping to control the oxygen content of the sintering furnace atmosphere, thereby ensuring product consistency. In addition, such a setting also has certain fault response capability. For example, if the feeding valve 31 fails and causes material blockage, the feeding first control valve 32 upstream can be quickly closed to repair the feeding valve 31, preventing the fault from expanding. At the same time, the faulty parts can also be replaced or repaired as needed to ensure the stable operation of the entire discharge device 100.

[0041] In the embodiment shown in Fig. 4, a valve-to-valve air pressure detection device is arranged between the feed second control valve 33 and the feed third control valve 34 downstream of the feed valve 31. The valve-to-valve air pressure detection device monitors the air pressure between the two control valves. It can accurately sense the size and change of the air pressure. According to the received air pressure data, it can determine the flow state of the material in the pipeline, and whether there are abnormal conditions such as blockage or leakage.

[0042] When the valve-to-valve air pressure detection device finds an abnormality, the opening and closing of the feed second control valve 33, the feed third control valve 34 and other related valves are adjusted to ensure the normal discharge of the material and prevent the air in the delivery hopper 20 from flowing backward into the sintering furnace. In this way, production accidents caused by abnormal air pressure are effectively prevented, and the stability and reliability of the discharge device 100 are improved.

[0043] Optionally, the feed valve 31 is a star feed valve. This type of feed valve is usually composed of a central shaft and a plurality of blades evenly distributed along the shaft. When the central shaft rotates, the blades push the material forward in the discharge channel, thereby controlling the flow of the material. The star feed valve is particularly suitable for handling materials that are sticky or prone to clumping, as it can effectively prevent material blockage through rotation.

[0044] In order to prevent the air in the delivery hopper 20 from flowing backward into the sintering furnace, the discharge device 100 further comprises a first air exchange assembly 40 connected to the first air exchange port 25. The first air exchange assembly 40 outputs gas from the first air exchange port 25 and delivers protective gas into the delivery hopper 20, which is the same as the protective gas in the main body of the sintering furnace. The implementation of the first air exchange port 25 on the delivery hopper 20 is not limited to one, for example, in some embodiments, the first air exchange port 25 can be an inlet and outlet, and the first air exchange assembly 40 can deliver protective gas into the delivery hopper 20 through the first air exchange port 25 after sucking the gas in the delivery hopper 20 through the first air exchange port 25. At this time, the operation of air suction and air filling is alternately performed rather than simultaneously performed. In another embodiment, the first air exchange port 25 is divided into a first air exchange inlet 251 and a first air exchange outlet 252, the first air exchange inlet 251 is only used to deliver gas into the delivery hopper 20, and the first air exchange outlet 252 is only used to suck gas from the delivery hopper 20. At this time, the operation of air suction and air filling can be alternately performed or simultaneously performed.

[0045] At the same time, after the sintering furnace feeds the material to the delivery hopper 20, a residual part of the material can accumulate at the outlet 13 due to its own gravity to form a seal, which can prevent the gas from flowing backward.

[0046] Specifically, when the first valve assembly 30 is closed, ready to receive the next batch of material into the delivery bucket 20, the first gas exchange assembly 40 will send the same protective gas into the delivery bucket 20 in advance to ensure that the delivery bucket 20 is in a protective gas-filled environment before receiving new material.

[0047] The purpose of replacing the air in the delivery bucket 20 is to prevent residual air in the delivery bucket 20 after delivery from entering the silo 10 and then entering the sintering furnace body through the silo 10 when the delivery bucket 20 receives new material from the silo 10, thereby maintaining the purity of the furnace atmosphere. If air accidentally enters the furnace, causing the oxygen content in the furnace to rise, the material in the furnace will react with oxygen, causing uneven sintering of the material or other byproducts.

[0048] As shown in FIG. 1, the discharge device 100 also includes a controller 80. The controller 80 is electrically connected to the first gas exchange assembly 40 and the first valve assembly 30 to control the first gas exchange assembly 40 to open when the delivery bucket 20 completes delivery and the first valve assembly 30 is closed.

[0049] The role of the controller 80 is to coordinate and manage the work of each component. The controller 80 is electrically connected to the first gas exchange assembly 40 and the first valve assembly 30, enabling it to receive and send electrical signals, thereby accurately controlling their working state, reducing uncertainty in the operation process, and improving the reliability of the discharge device 100 and the production efficiency of the sintering furnace.

[0050] In the working process of the sintering furnace, when the delivery bucket 20 completes the delivery task, the first valve assembly 30 will close in time to ensure the sealing of the silo 10. At this time, the controller 80 will detect the closing state of the first valve assembly 30 and use it as a trigger condition to send an opening signal to the first gas exchange assembly 40.

[0051] After receiving the opening signal, the first gas exchange assembly 40 begins to work, sending protective gas into the delivery bucket 20 to replace the residual air in the delivery bucket 20 after delivery, and preparing for the next cycle of silo 10 unloading to delivery bucket 20→ delivery bucket 20 delivering material. The controller 80 ensures that the delivery bucket 20 can receive a protective gas-filled environment in time for each delivery of material, thereby preventing air in the delivery bucket 20 after delivery from entering the silo 10 and then entering the sintering furnace body when the silo 10 unloads to the delivery bucket 20, thereby protecting the furnace atmosphere and the quality of the sintered material.

[0052] According to one embodiment of the present disclosure, a working cycle is described as follows:

[0053] Start stage: The delivery hopper 20, which has been replaced and filled with protective gas, receives the material feeding signal from the upstream process, and then the controller 80 controls the first valve assembly 30 to open, and the material starts to enter the delivery hopper 20 from the silo 10; when the silo 10 feeds the delivery hopper 20, the controller 80 controls the first gas exchange control valve 44 and the second gas exchange control valve 45 to open;

[0054] Delivery stage: The material continuously enters the delivery hopper 20, and when the material in the delivery hopper 20 reaches the set target weight, the controller 80 controls the first valve assembly 30 to close, controls the input of high-pressure gas into the delivery hopper 20, and the material in the delivery hopper 20 starts to be delivered to the subsequent process; when the delivery hopper 20 feeds backward, the controller 80 controls the first gas exchange control valve 44 and the second gas exchange control valve 45 to close;

[0055] Gas exchange stage: When the delivery of the material in the delivery hopper 20 is completed, the controller 80 controls the first gas exchange assembly to open, the first gas exchange control valve 44 and the second gas exchange control valve 45 are opened, the gas source exchanges the protective gas to the delivery hopper 20 through the gas exchange inlet to replace the residual air in the delivery hopper 20 after the delivery is completed, and the gas source is closed after the set target time, at which time the delivery hopper 20 is filled with protective gas.

[0056] Next working cycle: After the gas exchange is completed, the working cycle of the start stage, the delivery stage, and the gas exchange stage is continued.

[0057] Through the above working cycle, the discharging device 100 can ensure that the delivery hopper 20 is rapidly filled with protective gas after each delivery of the material, thereby effectively preventing air from entering the sintering furnace body and ensuring the atmosphere and material quality in the furnace. At the same time, the high automation and precise control of the entire working process greatly improve the production efficiency and reliability of the sintering furnace.

[0058] Optionally, the controller 80 also has high programmability and flexibility, and can adjust the working parameters of the first gas exchange assembly 40 and the first valve assembly 30, such as the opening and closing time, the gas flow, etc., according to the actual production requirements, to adapt to different production environments and requirements.

[0059] In some embodiments, at least one of the first valve assembly 30 and the first gas exchange assembly 40 is provided with a sensor. Through the sensor, the working state of the first valve assembly 30 and / or the first gas exchange assembly 40 can be monitored in real time, abnormal conditions can be monitored in time, and the safety of the discharging device 100 can be improved.

[0060] The sintering furnace discharging device 100 of the present disclosure provides a safer and more reliable transmission environment for the material, and provides a strong guarantee for the continuous and efficient operation of the sintering furnace.

[0061] According to some embodiments of the present disclosure, the discharging device 100, as shown in FIGS. 2-3 and 5-6, is provided with at least one air port 26 on the delivery bucket 20 for generating a pressure difference between the inside and outside of the delivery bucket 20 to transport the material.

[0062] In some specific embodiments, as shown in FIG. 5, the air port 26 is a high-pressure air port 261, wherein at least one high-pressure air port 26 is located above the discharging port 23.

[0063] By setting the high-pressure air port 26 as the power source of the delivery bucket 20, the material in the transmission process will not be disturbed by the external environment, ensuring the efficiency and stability of the material transmission.

[0064] The high-pressure air port 26 is located above the discharging port 23. Such a layout enables the high-pressure gas to directly act on the material about to leave the delivery bucket 20, providing sufficient power for it to smoothly pass through the discharging port 23. At the same time, the action of the high-pressure gas can also effectively prevent the material from blocking or sticking during the transmission process, ensuring the smooth progress of the discharging process.

[0065] In some optional embodiments, as shown in FIG. 6, the air port 26 includes a negative pressure air port 262, and the negative pressure air port 262 is the same as the discharging port 23.

[0066] The negative pressure air port 262 is mainly used to generate negative pressure in specific situations to attract the material to leave the delivery bucket 20 through the discharging port 23.

[0067] Optionally, the air port 26 includes at least one high-pressure air port 261 and one negative pressure air port 262. When the negative pressure air port 262 works simultaneously with the high-pressure air port 261, the delivery bucket 20 can quickly push the material to the discharging port 23 through the high-pressure gas. At the same time, the negative pressure air port 262 can stably suck the material out of the discharging port 23 by using the negative pressure suction force. Among them, the high-pressure air port 261 can ensure that the material passes through the discharging port 23 at a sufficient speed and pressure, and the negative pressure air port 262 can effectively avoid the blocking phenomenon of the discharging port 23.

[0068] In some embodiments, the discharging device 100 of the sintering furnace further includes a storage bin, which is connected in communication with the discharging port 23 through a material conveying pipeline, and the storage bin is provided with a tail-end gas outlet.

[0069] When using negative pressure as the power for material transportation, the discharging device 100 of the sintering furnace further includes an induced draft fan, which is in communication with the tail-end gas outlet. The induced draft fan is used to provide negative pressure suction force to the storage bin and the delivery bucket 20, so that a pressure difference is generated between the inside and outside of the delivery bucket 20, and the material in the delivery bucket 20 leaves the negative pressure air port 262 and enters the storage bin along the material conveying pipeline.

[0070] In some optional embodiments, a tail-end dust collection device is further arranged between the air blower and the storage bin to collect material dust and avoid clogging the air blower.

[0071] In the embodiment shown in FIG. 4, the sending hopper 20 is provided with a pressure detection table. It can monitor the pressure change of the sending hopper 20 in real time, and ensure that the sending hopper 20 operates within the normal working range. When the pressure exceeds or is lower than the set safety range, the pressure detection table sends an alarm to remind the operator to take timely measures to avoid accidents.

[0072] As shown in FIG. 2, the discharging device 100 according to some embodiments of the present disclosure is provided with a discharging channel 24 at the discharging port 23 of the sending hopper 20, and the high-pressure gas ports 26 further satisfy at least one of the following conditions:

[0073] Condition one: at least one high-pressure gas port 26 is located at the discharging port 23 and is arranged towards the discharging direction;

[0074] Condition two: at least one high-pressure gas port 26 is located on the discharging channel 24 and is arranged towards the discharging direction.

[0075] When at least one high-pressure gas port 26 is located at the discharging port 23 and is arranged towards the discharging direction, the high-pressure gas in the high-pressure gas port 26 has the effect of pushing the material, cleaning the discharging port 23, and preventing clogging.

[0076] When at least one high-pressure gas port 26 is located on the discharging channel 24 and is arranged towards the discharging direction, the high-pressure gas can directly act on the surface of the material. When the high-pressure gas is sprayed from the gas port, it will form a pushing force to help the material move more quickly and smoothly along the discharging channel 24. This greatly reduces the risk of material accumulation and clogging in the channel, ensuring the continuity of discharging.

[0077] Secondly, the high-pressure gas port 26 is arranged towards the discharging direction, ensuring that the spraying direction of the gas is consistent with the moving direction of the material. Not only does it improve the utilization efficiency of the gas, but it also avoids the erosion and wear of the inner wall of the discharging channel 24, prolonging the service life of the equipment.

[0078] Optionally, in some embodiments not shown in the drawings, the discharging port 23 further includes at least one of a material level detector, a pressure detector, and a temperature detector. This setting can increase the safety protection mechanism, such as to ensure that the discharging device 100 can automatically shut down or take emergency measures in abnormal conditions to prevent damage to the sintering furnace or production accidents.

[0079] The discharging device 100 according to some embodiments of the present disclosure further includes an air inlet pipeline 50, as shown in FIG. 3, which includes a high-pressure main channel 51 and at least two branch channels 52. This setting can ensure that the material is efficiently and continuously sent to the subsequent process.

[0080] One end of the high-pressure main trunk 51 is used to connect a high-pressure gas source, which serves as the main passage of the air inlet pipe 50, responsible for transporting high-pressure gas from the high-pressure gas source to the branch trunk 52.

[0081] Due to the high-pressure characteristics of high-pressure gas, the main trunk can ensure that the gas maintains sufficient power and stability during transmission.

[0082] One end of the branch trunk 52 is used to connect the other end of the high-pressure main trunk, and the other end of the branch trunk 52 is used to connect the high-pressure gas port 26. This connection ensures that high-pressure gas can flow smoothly from the main trunk into the branch trunk 52 and further to the designated location of the delivery hopper 20.

[0083] Among them, at least on the branch trunk 52 connected to the delivery hopper 20, there is also a gas pressure adjusting piece 53. Through the gas pressure adjusting piece 53, the flow and pressure of high-pressure gas in the high-pressure gas port 26 can be adjusted to control the material conveying speed. Improve the flexibility of the discharging device 100 to adapt to different specifications and types of materials, and make the discharging device 100 adapt to different working environments under different production needs.

[0084] In the embodiment shown in Figure 3, the delivery hopper 20 includes two high-pressure gas ports 26, one above the delivery hopper 20 and the other at the discharge port 23 of the delivery hopper 20.

[0085] The air inlet pipe 50 includes a high-pressure main trunk 51 and two branch trunks 52. One end of the high-pressure main trunk 51 is used to connect a high-pressure gas source, and the other end is connected to the two branch trunks 52. One of the branch trunks 52 is used to connect the high-pressure gas port 26 above the delivery hopper 20, and the other branch trunk 52 is used to connect the high-pressure gas port 26 at the discharge port 23.

[0086] Correspondingly, the air intake of compressed air can be increased, and the discharging speed of the material can be improved.

[0087] The discharging device 100 according to some embodiments of the present disclosure, as shown in Figures 2-3, the first air exchange port 25 includes a first air exchange inlet 251 and a first air exchange outlet 252.

[0088] In some optional embodiments, at least one first air exchange inlet 251 is the same as a high-pressure gas port 26.

[0089] The first air exchange inlet 251 is used to send high-pressure gas into the delivery hopper 20, which helps the high-pressure gas to flow smoothly in the delivery hopper 20. The strong thrust of the high-pressure gas can effectively overcome the friction and adhesion between the materials, ensuring that the materials can be smoothly discharged from the delivery hopper 20.

[0090] When the first ventilation inlet 251 and the high-pressure gas port 26 are the same port, redundant gas ports can be avoided on the delivery hopper 20. All gas flows can enter the delivery hopper 20 through the high-pressure gas port 26 and be managed by the gas pressure regulating valve, simplifying the structure of the discharge device 100.

[0091] Each gas port is a potential leak or maintenance point. Reducing the number of gas ports means reducing potential sources of failure, thereby reducing maintenance workload.

[0092] In some other embodiments, the first ventilation inlet 251 and the high-pressure gas port 26 can be set separately, or multiple first ventilation inlets 251 and first ventilation outlets 252 can be reasonably arranged according to the shape and volume of the hopper 20 to improve the replacement efficiency.

[0093] According to some embodiments of the discharge device 100 of the present disclosure, as shown in Figures 2-3, the first ventilation component 40 also includes: a ventilation air intake main channel 41, one end of the ventilation air intake main channel 41 is used to connect to the ventilation air source, and the other end of the ventilation air intake main channel 41 is used to connect to at least one branch channel 52, and the ventilation air intake main channel 41 is connected to the high-pressure air port 26 provided in the sending bucket 20 through the branch channel 52.

[0094] As shown in Figure 3, the ventilation intake main channel 41 serves as the primary passageway of the first ventilation assembly 40, responsible for transporting shielding gas from the ventilation gas source to the branch channel 52. This arrangement takes into account factors such as the flow rate, pressure, and stability of the shielding gas, ensuring smooth and efficient flow of shielding gas and improving the efficiency of shielding gas replacement in the delivery hopper 20.

[0095] Branch roads 52 are separated from the ventilation inlet main road 41, and the number of branch roads 52 is determined according to actual needs. They transport gas from the main road to the first ventilation port 25, i.e., the high-pressure gas port 26, of the sending hopper 20 to achieve the replacement of protective gas.

[0096] The function of the branch channel 52 is to ensure that the shielding gas encounters minimal resistance during transmission by reasonably designing its length and diameter, thereby improving the utilization efficiency of the shielding gas.

[0097] Furthermore, the branch road 52 can be flexibly adjusted and optimized according to different application scenarios.

[0098] Optionally, the branch channels 52 can be arranged in a straight line. In this scenario, the branch channels 52 can be arranged in a straight line along the axis of the delivery hopper 20. This arrangement minimizes resistance to gas transmission, thereby improving shielding gas utilization efficiency. Furthermore, the straight arrangement of the branch channels 52 facilitates installation and maintenance, reducing the complexity and maintenance costs of the discharge device 100.

[0099] Optionally, the branch trunk 52 adopts a branch arrangement. By setting branch points at different positions, the protective gas can be branched to different directions. This arrangement can ensure the uniform distribution of the protective gas inside the delivery hopper 20, improving the effect of gas replacement.

[0100] In addition, the branch trunk 52 is connected with the high-pressure gas port 26. In this way, the jet angle of the high-pressure gas port 26 is utilized to achieve efficient gas intake, facilitate management, make the gas flow more concentrated and orderly, and reduce the risk of gas leakage.

[0101] The discharge device 100 according to some embodiments of the present disclosure further comprises a dust removal system 90. As shown in FIGS. 2-4, the dust removal system 90 is connected with the first gas exchange port 25, and the gas output from the delivery hopper 20 is sent to the dust removal system 90 through the first gas exchange port 25.

[0102] The main purpose of the dust removal system 90 is to collect the material dust in the gas output from the delivery hopper 20. These dusts are mainly the dust generated during the transportation of the material. Through the dust removal system 90, it can be ensured that these dusts will not be directly discharged into the environment with the gas, protecting the environment and ensuring compliance with environmental requirements.

[0103] In some embodiments, as shown in FIGS. 2-3, the dust removal system 90 is connected with the first gas exchange outlet 252 in the first gas exchange port 25.

[0104] Then, after the protective gas enters the delivery hopper 20, the original air in the delivery hopper 20 will be gradually squeezed and flow into the dust removal system 90 through the first gas exchange outlet 252 due to the pushing effect of the protective gas, and then be uniformly discharged after dust removal.

[0105] In some embodiments, as shown in FIG. 4, the stock bin 10 has an inlet 11, an outlet 13, and a second gas exchange port 14. The outlet 13 is connected with the feeding channel 21, and the inlet 11 is connected with the main body of the sintering furnace.

[0106] The inlet 11 is a channel for the material to enter the stock bin 10, and it is connected with the main body of the sintering furnace to ensure that the material can be smoothly transferred from the sintering furnace to the stock bin 10. The outlet 13 is a channel for the material to leave the stock bin 10, and it is connected with the feeding channel 21 to enable the material to smoothly enter the next processing stage.

[0107] The discharge device 100 further comprises a second valve assembly 60 and a second gas exchange assembly 70.

[0108] The second valve assembly 60 is used to control the opening and closing of the inlet 11. For the sintering furnace with intermittent production, the second valve assembly 60 can be opened when it is necessary to add materials into the bin 10. When the discharging is completed or the amount of materials in the bin 10 reaches a set value, the system will close the second valve assembly 60, so as to realize the accurate control of the materials entering the bin 10. For the sintering furnace with continuous production, such as the rotary sintering furnace for lithium iron phosphate, the bin 10 is ventilated before starting production, and the second valve assembly 60 is in the normally open state during the production stage.

[0109] As shown in FIG. 4, the second ventilation assembly 70 is connected with the second ventilation port 14. The second ventilation assembly 70 outputs the gas in the bin 10 through the second ventilation port 14 and delivers the protective gas into the bin 10. The protective gas is the same as the protective gas in the main body. Through the second ventilation port 14, the gas in the bin 10 can be replaced or adjusted, so as to ensure that the materials are in the atmosphere of the protective gas in the bin 10.

[0110] The second valve assembly 60 can be a hand-controlled valve or an electrically-controlled valve.

[0111] In some embodiments, as shown in FIG. 4, the controller 80 is electrically connected with the second ventilation assembly 70, the first valve assembly 30 and the second valve assembly 60. The controller 80 improves the automation and intelligence of the discharging device 100. Through the electrical connection, the controller 80 can not only realize the accurate control of the first valve assembly 30 and the second valve assembly 60, but also can adjust the working state of the second ventilation assembly 70 in real time.

[0112] Before starting production, when the first valve assembly 30 is in the closed state, the controller 80 sends an instruction to the second ventilation assembly 70 to open. The purpose is to discharge the air in the bin 10 through the second ventilation port 14 so that the bin 10 is filled with the protective gas for the entry of the materials during production.

[0113] Optionally, the controller 80 can adjust the working parameters of the second ventilation assembly 70, such as the gas flow and the ventilation time, according to the actual needs, so as to meet different production requirements.

[0114] Optionally, the second ventilation assembly 70 further comprises a second gas filter 71 and a ventilation fourth control valve 72.

[0115] The second gas filter 71 can intercept the dust in the output gas.

[0116] The ventilation fourth control valve 72 can control the flow rate of the gas flow discharged through the second ventilation port 14, so as to adjust the air pressure in the bin 10.

[0117] The dust removal system 90 is connected with the second air exchange port 14, and the gas output from the silo 10 is sent to the dust removal system 90 through the second air exchange port 14. It is ensured that the gas output from the silo 10 can be effectively treated by the dust removal system 90, so as to ensure that the gas after dust removal is clean and meets the environmental protection requirements.

[0118] The discharging device 100 according to some embodiments, as shown in FIG. 4, the first air exchange assembly 40 further comprises a first air exchange channel 42, a first gas filter 43, a first air exchange control valve 44 and a second air exchange control valve 45.

[0119] One end of the first air exchange channel 42 is communicated with the first air exchange port 25. The first air exchange channel 42 is used to connect the first air exchange port 25 and the dust removal system 90, and provides a smooth channel, so that the gas output from the delivery hopper 20 can smoothly enter the dust removal system 90 for further treatment.

[0120] The first gas filter 43 is arranged on the first air exchange channel 42. The first gas filter 43 is used for physical filtration, and can be equipped with adsorbents which can effectively remove harmful gases in the output gas. When the output gas in the delivery hopper 20 passes through the adsorbents, the harmful gases will be adsorbed on the surface and no longer flow, which plays a role in protecting the environment. Moreover, it can reduce the corrosion and damage of harmful gases to the equipment, prolong the service life of the dust removal system 90, and improve the operation efficiency of the whole discharging device 100.

[0121] The first air exchange control valve 44 is arranged on the first air exchange channel 42 and located upstream of the first gas filter 43. The gas flow entering the first gas filter 43 can be controlled. By adjusting the opening degree of the valve, the flow and speed of the gas can be accurately controlled, so as to avoid overloading or underloading of the filter, thereby ensuring that the first gas filter 43 can work stably and efficiently.

[0122] In order to increase the production capacity, a plurality of sintering furnaces can be arranged in parallel in the actual production process, and in order to save resources, the same dust removal system 90 is usually used in the discharging devices 100 of the plurality of sintering furnaces to provide air exchange gas source power and treat the air exchange tail gas of the silos 10 and the delivery hoppers 20 of the plurality of sintering furnaces synchronously. However, the air exchange time of the discharging devices 100 of different sintering furnaces is different. Therefore, when the discharging device 100 of a certain sintering furnace is performing air exchange, the discharging device 100 of another sintering furnace connected with the same dust removal system 90 does not need to perform air exchange, the corresponding first air exchange control valve 44 is closed, and the dust removal system 90 is always opened. Therefore, a negative pressure will be continuously generated on the first gas filter 43 through the first air exchange channel 42, which is easy to cause the first gas filter 43 to be overloaded and affect the service life.

[0123] To this end, in some embodiments, a second air exchange control valve 45 is arranged on the first air exchange passage 42 and downstream of the first gas filter 43. The second air exchange control valve 45 is mainly used to adjust the pressure of the gas treated by the first gas filter 43. By controlling the opening of the valve, the pressure of the gas can be adjusted, and when there is no need for air exchange, the continuous generation of negative pressure by the dust removal system 90 can be avoided, which causes the gas filter 43 to be overloaded.

[0124] At the same time, the first air exchange control valve 44 and the second air exchange control valve 45 can also play a role in isolation and protection. When the first gas filter 43 needs to be replaced or repaired, by closing the first air exchange control valve 44 and the second air exchange control valve 45, the first gas filter 43 can be isolated to prevent the gas from flowing directly in or out, thereby protecting the safety of the operator and improving the maintenance efficiency.

[0125] According to some embodiments of the present disclosure, the discharge device 100 is shown in FIG. 1 and FIG. 4. The delivery hopper 20 is located below the bin 10, the inlet 22 is located at the top of the delivery hopper 20, and the discharge outlet 23 is located at the bottom of the delivery hopper 20.

[0126] During the discharging process, the material falls from the bin 10 to the delivery hopper 20 by its own gravity and is discharged through the discharge outlet 23 at the bottom. This arrangement can simplify the discharging process and also reduce energy consumption and maintenance costs.

[0127] In the present disclosure, the protective gas is an inert gas. The inert gas includes but is not limited to nitrogen, helium, argon and their mixtures. The use of inert gas can prevent the oxidation reaction of lithium iron phosphate during high-temperature sintering, thereby affecting the purity of the material, and at the same time, avoiding the negative impact on the electrochemical performance of the material.

[0128] Preferably, the protective gas is nitrogen. Nitrogen can effectively exclude oxygen in the discharge device 100, thereby inhibiting the occurrence of oxidation reaction and ensuring the purity of the material.

[0129] Next, referring to FIG. 1-4, the discharge device 100 according to one specific embodiment of the present disclosure is described.

[0130] Referring to FIG. 1-4, the discharge device 100 includes a bin 10, a delivery hopper 20, a first valve assembly 30, a first air exchange assembly 40, an air inlet pipe 50, a second valve assembly 60, a second air exchange assembly 70, a controller 80 and a dust removal system 90.

[0131] Referring to FIG. 2-3, the delivery hopper 20 includes an inlet passage 21, an inlet 22, a discharge outlet 23, a discharge passage 24, a first air exchange port 25 and two high-pressure gas ports 26.

[0132] The sending hopper 20 is located below the hopper 10, the feeding inlet 22 is located at the top of the sending hopper 20, and the discharging outlet 23 is located at the bottom of the sending hopper 20.

[0133] The feeding inlet 22 is connected with the feeding channel 21 between the hopper 10. The first valve assembly 30 is arranged on the feeding channel 21 for controlling the opening and closing of the feeding channel 21.

[0134] The first gas exchange assembly 40 is connected with the first gas exchange port 25, the first gas exchange assembly 40 outputs gas from the first gas exchange port 25 and transports the protective gas into the sending hopper 20.

[0135] The sending hopper 20 is provided with a discharging channel 24 at the discharging outlet 23.

[0136] One of the high-pressure gas ports 26 is arranged above the discharging outlet 23 on the inner wall of the discharging channel 24 and faces the discharging direction. The other high-pressure gas port 26 is arranged at the discharging outlet 23 and faces the discharging direction.

[0137] The gas inlet pipeline 50 includes a high-pressure main channel 51, two branch channels 52 and a gas pressure adjusting member 53.

[0138] One end of the high-pressure main channel 51 is used for connecting a high-pressure gas source, and the other end is used for connecting the two branch channels 52.

[0139] One end of one of the branch channels 52 is connected with the other end of the high-pressure main channel, and the other end is used for connecting the high-pressure gas port 26. The gas pressure adjusting member 53 is arranged on the branch channel 52.

[0140] The first gas exchange port 25 includes two first gas exchange inlets 251 and a first gas exchange outlet 252.

[0141] The two first gas exchange inlets 251 correspond to the two high-pressure gas ports 26 respectively.

[0142] The first gas exchange assembly 40 includes a gas exchange inlet main channel 41, a first gas exchange channel 42, a first gas filter 43, a first gas exchange control valve 44 and a second gas exchange control valve 45.

[0143] The gas exchange inlet main channel 41 is in communication with the first gas exchange inlet 251.

[0144] The first gas exchange channel 42, the first gas filter 43, the first gas exchange control valve 44 and the second gas exchange control valve 45 are in communication with the first gas exchange outlet 252.

[0145] One end of the gas exchange inlet main channel 41 is used for connecting a gas exchange gas source, and the other end of the gas exchange inlet main channel 41 is connected with the two branch channels 52.

[0146] The hopper 10 includes an inlet 11, an outlet 13 and a second gas exchange port 14.

[0147] The inlet 11 is connected to the main body of the sintering furnace, and the outlet 13 is connected to the feeding channel 21 of the delivery hopper 20.

[0148] The second valve assembly 60 is used to control the opening and closing of the inlet 11 of the bin 10.

[0149] The second air exchange assembly 70 comprises a second gas filter 71 and an air exchange fourth control valve 72.

[0150] The air exchange fourth control valve 72 is connected to the second air exchange port 14, and the second gas filter 71 is arranged downstream of the air exchange fourth control valve 72.

[0151] Referring to FIG. 4, the controller 80 is electrically connected to the first air exchange assembly 40, the second air exchange assembly 70, the first valve assembly 30 and the second valve assembly 60 respectively.

[0152] Referring to FIG. 4, the dust removal system 90 is connected to the first air exchange outlet 252 and the second air exchange port 14 respectively.

[0153] One end of the first air exchange channel 42 is connected to the first air exchange port 25. The first gas filter 43 is arranged on the first air exchange channel 42. The air exchange first control valve 44 and the air exchange second control valve 45 are both arranged on the first air exchange channel 42 and are located upstream and downstream of the first gas filter 43 respectively.

[0154] The first valve assembly 30 comprises a feeding valve 31, a feeding first control valve 32, a feeding second control valve 33 and a feeding third control valve 34 arranged on the feeding channel 21.

[0155] The feeding first control valve 32 is located upstream of the feeding valve 31, and the feeding second control valve 33 and the feeding third control valve 34 are sequentially located downstream of the feeding valve 31.

[0156] Other configurations of the discharging device according to the embodiments of the present disclosure, such as the sintering furnace and the like, and the operation are known to those skilled in the art, and will not be described in detail here.

[0157] In the description of the present disclosure, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0158] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0159] In the present disclosure, unless explicitly and specifically defined otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0160] In the present disclosure, unless explicitly and specifically defined otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0161] In the description of the present disclosure, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present disclosure, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present disclosure and the features of different embodiments or examples without contradiction.

[0162] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present disclosure, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A discharge device for a sintering furnace, wherein: include: A silo, which is connected to the main body of the sintering furnace to collect the sintered materials; A sending hopper, the sending hopper having a feed port, a discharge port and a first ventilation port, and a feed channel connected to the feed port and the silo; a first valve assembly, the first valve assembly being provided on the feed channel and being used to control the on-off of the feed channel; a first ventilation component connected to the first ventilation port, outputting gas from the first ventilation port and delivering protective gas into the sending hopper, wherein the protective gas is the same as the protective gas in the main body; A controller is electrically connected to the first ventilation component and the first valve component to control the first ventilation component to open when the sending bucket completes sending and the first valve component is closed.

2. The discharge device of the sintering furnace according to claim 1, wherein: The sending bucket is provided with at least one air port for generating an air pressure difference between the inside and outside of the sending bucket to transport the material; The gas ports are high-pressure gas ports, and at least one of the high-pressure gas ports is located above the discharge port.

3. The discharge device of the sintering furnace according to claim 2, wherein: The sending hopper is provided with a discharge channel at the discharge port, and the high-pressure gas port further satisfies at least one of the following conditions: Condition 1: At least one of the high-pressure gas ports is located at the discharge port and is arranged toward the discharge direction; Condition 2: At least one of the high-pressure gas ports is located in the discharge channel and is arranged toward the discharge direction.

4. The discharging device according to any one of claims 2 or 3, wherein: The discharging device further comprises: an air intake pipe, the air intake pipe comprising: A high-pressure main road, one end of which is used to connect to a high-pressure gas source; at least two branch trunks, one end of each branch trunk being connected to the other end of each high-pressure trunk, and the other end of each branch trunk being connected to the high-pressure gas outlet; Among them, an air pressure regulating component is also provided on at least the branch road connected to the sending bucket.

5. The discharging device according to claim 4, wherein: The first ventilation port includes a first ventilation inlet and a first ventilation outlet; the first ventilation component also includes a ventilation inlet channel, one end of the ventilation inlet channel is used to connect to a ventilation gas source, and the other end of the ventilation inlet channel is used to connect to at least one first ventilation inlet.

6. The discharging device according to claim 5, wherein: At least one first ventilation inlet is the same as the high-pressure gas port provided on the sending hopper; One end of the ventilation inlet channel is used to connect to the ventilation gas source, and the other end of the ventilation inlet channel is used to connect to at least one of the branch channels, and the ventilation inlet channel and the high-pressure gas port provided in the sending bucket are connected through the branch channels. connected.

7. The discharge device of a sintering furnace according to any one of claims 1 to 6, wherein: The sending bucket is provided with at least one air port for generating an air pressure difference between the inside and outside of the sending bucket to transport the material; The air port is a negative pressure air port, and the negative pressure air port and the discharge port are the same port.

8. The discharge device of a sintering furnace according to any one of claims 1 to 7, wherein: The first valve assembly includes at least a plurality of control valves arranged on the feed channel; the plurality of control valves are respectively a feeding valve, a first feeding control valve, a second feeding control valve, and a third feeding control valve, wherein the first feeding control valve is located upstream of the feeding valve, and the second feeding control valve and the third feeding control valve are located downstream of the feeding valve; an inter-valve air pressure detection device is provided between the second feeding control valve and the third feeding control valve downstream of the feeding valve.

9. The discharging device according to any one of claims 1 to 8, wherein: Also includes: A dust removal system is connected to the first ventilation port, and the gas output from the sending hopper is sent to the dust removal system through the first ventilation port.

10. The discharging device according to claim 9, wherein: The silo has an inlet, an outlet and a second ventilation port, the outlet is connected to the feed channel, and the inlet is connected to the main body of the sintering furnace; The discharging device also includes: a second valve assembly, the second valve assembly being used to control the opening and closing of the inlet; a second ventilation component connected to the second ventilation port, the second ventilation component outputs the gas in the silo through the second ventilation port and delivers a protective gas into the silo, the protective gas being the same as the protective gas in the main body; The controller is electrically connected to the second ventilation component and the first valve component to control the second ventilation component to open after the silo delivers material to the sending hopper and when the first valve component and the second valve component are both closed; The dust removal system is connected to the second ventilation port, and the gas output from the silo is sent to the dust removal system through the second ventilation port.

11. The discharging device according to any one of claims 1 to 10, wherein: The first ventilation component also includes: a first ventilation channel, one end of the first ventilation channel being connected to the first ventilation port; a first gas filter, provided on the first ventilation channel; a first ventilation control valve, provided on the first ventilation channel and located upstream of the first gas filter; The second ventilation control valve is provided on the first ventilation channel and is located downstream of the first gas filter.

12. The discharging device according to any one of claims 1 to 11, wherein: The sending hopper is located below the silo, the feeding port is located at the top of the sending hopper, and the discharging port is located at the bottom of the sending hopper.

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