Material conveying system

Abstract

The embodiment of the present application provides a kind of material conveying system.The material conveying system includes first air inlet pipe, first dust collector and temporary storage warehouse;First air inlet pipe is equipped with first feed inlet, and material enters first air inlet pipe through first feed inlet;First dust collector includes first inlet, first gas outlet and first discharge port, and first air inlet pipe is communicated with first inlet, and material and protective gas in mixture are separated in first dust collector, protective gas is discharged from first gas outlet, and material is discharged from first discharge port;Temporary storage warehouse has second feed inlet, and second feed inlet is communicated with the first discharge port of first dust collector, and temporary storage warehouse is used to store the material discharged from first dust collector.The material conveying system provided by the embodiment of the present application uses protective gas to protect material, so that it is isolated from oxygen, avoids material oxidation under high temperature conditions, so that it can be suitable for material transportation under high temperature conditions, and avoids energy waste caused by temperature drop and then temperature rise.

Description

Technical Field

[0001] This application relates to the field of material conveying technology, and in particular to a material conveying system. Background Technology

[0002] In recent years, the demand for lithium-ion batteries in the new energy vehicle and energy storage sectors has continued to surge, driving the rapid expansion of the lithium-ion battery industry market. The negative electrode material of a lithium-ion battery is the carrier of lithium ions and electrons during the charging process, playing a role in energy storage and release, and is one of the important raw materials for lithium-ion batteries. Currently, the main negative electrode materials for lithium-ion batteries include natural graphite and artificial graphite, with artificial graphite accounting for a higher proportion.

[0003] In the production process of artificial graphite anode materials, the secondary particles obtained by granulation are first heat-treated at 600℃-650℃ in a high-temperature reactor, and then introduced into a low-temperature reactor. The material is cooled to 60℃-80℃ by circulating water jacket for 3-5 hours, and then transported to the temporary storage bin of the rotary kiln pre-carbonization process. During pre-carbonization, the material in the temporary storage bin needs to be transported to the rotary kiln and heated to 900℃-1050℃. However, the cooling process of the material from 600℃-650℃ to 60℃-80℃ in the low-temperature reactor and the heating process of the material from 60℃-80℃ to 600℃-650℃ in the rotary kiln waste a lot of energy, resulting in a high production cost of artificial graphite anode materials. Utility Model Content

[0004] Based on this, embodiments of this application provide a material conveying system.

[0005] In a first aspect, embodiments of this application provide a material conveying system, including a first air inlet pipe, a first dust collector, and a temporary storage bin;

[0006] The first air inlet pipe is used to mix the protective gas and the material in the pipe and use the power of the protective gas to transport the material. The first air inlet pipe is provided with a first feed port, through which the material enters the first air inlet pipe.

[0007] The first dust collector includes a first inlet, a first air outlet, and a first discharge outlet. The first air inlet pipe is connected to the first inlet, so that the mixture of material and protective gas in the first air inlet pipe enters the first dust collector through the first inlet. The material and protective gas in the mixture are separated in the first dust collector. The protective gas is discharged from the first air outlet, and the material is discharged from the first discharge outlet.

[0008] The temporary storage bin has a second inlet, which is connected to the first outlet of the first dust collector. The temporary storage bin is used to store materials discharged from the first dust collector.

[0009] The outer surface of the first air intake pipe is provided with a heat insulation layer.

[0010] In some embodiments, the first dust collector further includes a first cavity, a first filter element and a first connector located within the first cavity, the first connector being disposed around the first filter element and connecting the first filter element and the first cavity, the first filter element having a plurality of first filter holes;

[0011] The first connector vertically divides the first inner cavity of the first dust collector into a first space located above and a second space located below;

[0012] The first cavity is provided with a first inlet, a first air outlet and a first material outlet. The first air outlet is connected to the first space, the first inlet and the first material outlet are connected to the second space, and the first material outlet is located below the first inlet.

[0013] In some embodiments, the first filter element has a first groove, and a plurality of first filter holes are distributed on the groove wall and / or the groove bottom of the first groove, all of the plurality of first filter holes communicating with the first groove, and the opening of the first groove communicating with the first space; and / or,

[0014] The material conveying system further includes a first backflush pipe, and the first chamber of the first dust collector is provided with a second inlet. The second inlet is connected to the first space, and the first backflush pipe is connected to the second inlet. It is used to input protective gas into the first space of the first dust collector to impact the first filter holes on the first filter element and prevent the first filter holes from being blocked by material.

[0015] In some embodiments, the material conveying system further includes a second dust collector, the second dust collector including a second cavity, the second cavity having a second inner cavity, the second cavity being provided with a first inlet and a second outlet, the first inlet and the second outlet both communicating with the second inner cavity, and the second outlet being disposed above the first inlet;

[0016] The top of the temporary storage chamber is provided with a second inlet and outlet, which is connected to the first inlet and outlet. When the mixture of material and gas in the temporary storage chamber enters the second dust collector through the second inlet and outlet and the first inlet and outlet, the material and gas are separated. The material falls downward and returns to the temporary storage chamber through the first inlet and outlet and the second inlet and outlet, while the gas is discharged from the second outlet.

[0017] In some embodiments, the second dust collector further includes a second filter element and a second connector located in the second cavity. The second connector is disposed around the second filter element and connects the second filter element and the second cavity. The second filter element is provided with a plurality of second filter holes.

[0018] The second connector vertically divides the second inner cavity of the second dust collector into a third space located above and a fourth space located below. The second air outlet connects to the third space, and the second inlet / outlet connects to the fourth space.

[0019] In some embodiments, the second filter element has a second groove, and a plurality of second filter holes are distributed on the groove wall and / or the groove bottom of the second groove, all of the plurality of second filter holes communicating with the second groove, and the opening of the second groove communicating with the fourth space; and / or,

[0020] The material conveying system also includes a second backflush pipe, and the second chamber of the second dust collector is provided with a third inlet. The third inlet is connected to the third space, and the second backflush pipe is connected to the third inlet. It is used to input protective gas into the third space of the second dust collector to impact the second filter holes on the second filter element and prevent the second filter holes from being blocked by material.

[0021] In some embodiments, the material conveying system further includes a return air pipeline, which includes a main return air pipe, a branch return air pipe, and a first exhaust pipe. One end of the main return air pipe is connected to the first outlet of the first dust collector. The branch return air pipe and the first exhaust pipe are connected in parallel and are both connected to the main return air pipe. The branch return air pipe is connected to the first inlet air pipeline. The first exhaust pipe is provided with a venting proportional valve.

[0022] In some embodiments, the return air branch pipe includes a first main pipe, a first branch pipe, and a displacement air pipe. The first main pipe is connected in parallel with the first exhaust pipe and is also connected to the return air main pipe. The first branch pipe and the displacement air pipe are connected in parallel with the first main pipe and are also connected to the first main pipe. The first branch pipe is connected to the first intake pipe.

[0023] The temporary storage chamber is equipped with a ventilation port, and the replacement gas pipe is connected to the ventilation port. The replacement gas pipe is equipped with a replacement gas control valve; and / or,

[0024] The return gas main is equipped with a heat exchanger and a fan, which are arranged at intervals along the direction of gas flow.

[0025] In some embodiments, the material conveying system further includes a buffer bin, which is disposed between the first dust collector and the temporary storage bin;

[0026] The inlet of the buffer chamber is connected to the first outlet of the first dust collector, and an upper valve is provided between the inlet of the buffer chamber and the first outlet of the first dust collector. The upper valve is used to control the first dust collector to feed material into the buffer chamber.

[0027] The outlet of the buffer bin is connected to the second inlet of the temporary storage bin, and a lower valve is provided between the outlet of the buffer bin and the second inlet of the temporary storage bin. The lower valve is used to control the feed of the buffer bin to the temporary storage bin.

[0028] During the operation of the material conveying system, at the same time, one of the upper valve and the lower valve is in the closed state and the other is in the open state.

[0029] In some embodiments, the first air intake pipe is provided with an acceleration chamber, the acceleration chamber having an air inlet, a first feed inlet, and a mixture outlet. Protective gas enters the acceleration chamber through the air inlet, and material enters the acceleration chamber through the first feed inlet. The material and the protective gas mix within the acceleration chamber to form a mixture, which is then discharged from the mixture outlet; and / or...

[0030] The material conveying system also includes an air hammer and a compressed gas pipeline. The air hammer is located on the outside of the temporary storage bin and is used to strike the outer wall of the temporary storage bin to disperse the material inside the temporary storage bin. The compressed gas pipeline is connected to the air hammer and is used to provide gas power to the air hammer.

[0031] The material conveying system provided in this application embodiment uses a first inlet pipe to mix protective gas and material within the pipe. The protective gas is used to power the material conveying. The mixture of protective gas and material is first conveyed to a first dust collector for gas and material separation. The protective gas is discharged from the first outlet of the first dust collector, and the material is discharged from the first discharge outlet of the first dust collector. The discharged material enters a temporary storage bin for temporary storage, awaiting the next process. This material conveying system uses protective gas to protect the material, isolating it from oxygen and preventing oxidation of the material under high-temperature conditions. Therefore, it is suitable for transporting materials (such as secondary particles) under high-temperature conditions, avoiding energy waste caused by cooling first and then heating. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0033] Figure 1 This is a schematic diagram of a first type of identification for a material conveying system provided in an embodiment of this application.

[0034] Figure 2This is a second schematic diagram of a material conveying system provided in an embodiment of this application.

[0035] Figure 3 This is a schematic diagram of the structure of the first dust collector provided in an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the structure of the second dust collector provided in an embodiment of this application.

[0037] Component symbol explanation:

[0038] 2. Gas flow meter; 3. Inlet proportional valve; 4. Inlet main valve; 5. Inlet control valve; 6. Acceleration chamber; 7. Material; 10. Weighing module; 11. Second pulse valve; 12. Second dust collector; 13. Flexible connection; 14. Lower valve; 15. Buffer chamber; 16. First temperature transmitter; 17. Upper valve; 19. First pressure transmitter; 20. Differential pressure gauge; 21. First dust collector; 22. Second pressure transmitter; 23. Second temperature transmitter; 24. First pulse valve 25. Pressure reducing valve; 26. Inlet manual valve; 28. Gas storage tank; 27. Compressed gas control valve; 29. ​​Heat exchanger; 30. Third pressure transmitter; 31. Third temperature transmitter; 32. Dew point meter; 33. Oxygen analyzer; 34. Fan; 35. Fourth pressure transmitter; 36. Fourth temperature transmitter; 37. Exhaust proportional valve; 38. Return gas control valve; 39. Displacement gas control valve; 40. Air hammer; 41. Electric unloading valve; 42. Manual unloading valve; 43. Temporary storage 511. First intake pipe; 512. Second air supply pipe; 521. First backflush pipe; 522. Second backflush pipe; 523. First air supply pipe; 53. Main intake pipe; 54. Main return pipe; 541. First main pipe; 542. First branch pipe; 543. Replacement air pipe; 545. First exhaust pipe; 551. Second exhaust pipe; 552. Main exhaust pipe; 56. Compressed gas pipe; 61. First cavity; 611. First inlet; 612. First outlet. ; 613, First discharge port; 614, Second inlet; 62, First filter element; 621, First groove; 63, First connector; 610, First inner cavity; 601, First space; 602, Second space; 71, Second cavity; 711, First inlet / outlet; 712, Second air outlet; 713, Third inlet; 72, Second filter element; 721, Second groove; 73, Second connector; 710, Second inner cavity; 703, Third space; 704, Fourth space. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Please see Figure 1 and Figure 2 This application provides a material conveying system, including a first air inlet pipe 511, a first dust collector 21, and a temporary storage bin 43.

[0045] Please see Figure 1 The first air inlet pipe 511 is used to mix the protective gas and the material 7 in the pipe and to use the power of the protective gas to transport the material 7. The first air inlet pipe 511 is provided with a first feed port, and the material 7 enters the first air inlet pipe 511 through the first feed port.

[0046] Please see Figure 3 The first dust collector 21 includes a first inlet 611, a first outlet 612, and a first discharge outlet 613. The first inlet pipe 511 is connected to the first inlet 611. The mixture of material 7 and protective gas in the first inlet pipe 511 enters the first dust collector 21 through the first inlet 611. The material 7 and protective gas in the mixture are separated in the first dust collector 21. The protective gas is discharged from the first outlet 612, and the material 7 is discharged from the first discharge outlet 613.

[0047] Please see Figure 1 and Figure 2 The temporary storage bin 43 has a second inlet, which is connected to the first outlet 613 of the first dust collector 21 and is used to store the material 7 discharged from the first dust collector 21.

[0048] For example, the outer surface of the first air inlet pipe 511 is provided with a heat insulation layer to maintain the temperature of the material 7 during transportation and avoid heat loss. For example, the material of the heat insulation layer is rock wool, slag wool, aluminum silicate fiber, expanded perlite, or composite silicate, etc.

[0049] For example, the material 7 is particles (secondary particles) obtained by granulating raw materials during the production process of artificial graphite anode material, and the temperature of the material 7 is 600℃-650℃.

[0050] The material conveying system provided in this application embodiment uses a first air inlet pipe 511 to mix protective gas and material 7 in the pipe. The protective gas is used to power the material 7 for conveying. The mixture of protective gas and material 7 is first conveyed to a first dust collector 21 for separation of gas and material 7. The protective gas is discharged from the first air outlet 612 of the first dust collector 21, and the material 7 is discharged from the first discharge outlet 613 of the first dust collector 21. The discharged material 7 enters a temporary storage bin 43 for temporary storage, awaiting the next process. This material conveying system uses protective gas to protect the material 7, isolating it from oxygen and preventing the material 7 from being oxidized under high temperature conditions. Therefore, it can be used for the transportation of material 7 (e.g., secondary particles) under high temperature conditions, avoiding energy waste caused by cooling first and then heating.

[0051] Please see Figure 1 and Figure 2 For example, the first air inlet pipe 511 is provided with a first temperature transmitter 16 and a first pressure transmitter 19. The first temperature transmitter 16 is used to monitor the temperature of the mixture of protective gas and material 7 in the first air inlet pipe 511, and the first pressure transmitter 19 is used to monitor the pressure of the mixture of protective gas and material 7 in the first air inlet pipe 511.

[0052] Please see Figure 3 The first dust collector 21 further includes a first cavity 61, a first filter element 62 and a first connector 63 located within the first cavity 61. The first connector 63 is disposed around the first filter element 62 and connects the first filter element 62 and the first cavity 61. The first filter element 62 is provided with a plurality of first filter holes. The first connector 63 vertically divides the first inner cavity 610 of the first dust collector 21 into a first space 601 located above and a second space 602 located below. The first cavity 61 is provided with a first inlet 611, a first air outlet 612 and a first discharge outlet 613. The first air outlet 612 communicates with the first space 601, the first inlet 611 and the first discharge outlet 613 communicate with the second space 602, and the first discharge outlet 613 is located below the first inlet 611.

[0053] Understandably, when the mixture of material 7 and protective gas enters the second space 602 of the first dust collector 21 through the first inlet 611, the protective gas in the mixture will automatically flow upward. After passing through the first filter hole on the first filter element 62, the protective gas enters the first space 601 and is discharged from the first dust collector 21 through the first outlet 612. The particle size of material 7 in the mixture is larger than the size of the first filter hole on the first filter element 62. Therefore, material 7 cannot pass through the first filter element 62. At this time, material 7 will be collected in the second space 602 and then discharged from the first outlet 613.

[0054] In some embodiments, the first connector 63 may also be provided with multiple filter holes to enhance the filtration capacity of the first dust collector 21.

[0055] Please see Figure 3 For example, the first filter element 62 has a first groove 621, and a plurality of first filter holes are distributed on the groove wall and / or the bottom of the first groove 621. All the first filter holes are connected to the first groove 621, and the opening of the first groove 621 is connected to the first space 601. It can be understood that by having a first groove 621 in the first filter element 62 and having a plurality of first filter holes distributed on the groove wall and / or the bottom of the first groove 621, the filtration area of ​​the first filter element 62 can be increased within a limited space, thereby improving its filtration capacity.

[0056] Please see Figure 1 and Figure 2 The first dust collector 21 is equipped with a differential pressure gauge 20, which is used to detect the pressure difference between the first space 601 and the second space 602. By detecting the pressure difference, it can be determined whether the first filter pore of the first filter element 62 is blocked by the material 7 or whether the first filter element 62 is damaged. Under normal working conditions, the pressure difference is in the range of P1 to P2, where P2 is greater than P1. When the pressure difference detected by the differential pressure gauge 20 is greater than P2, it means that the first filter pore of the first filter element 62 is blocked by the material 7. At this time, it is necessary to increase the pulse frequency of the backflushing gas, increase the air volume of the backflushing gas, or reduce the feed rate. When the pressure difference detected by the differential pressure gauge 20 is less than P1, it means that the first filter element 62 is damaged. At this time, the first filter element 62 loses its blocking effect on the material 7.

[0057] Please see Figure 1 and Figure 3The material conveying system further includes a first backflush pipe 521. The first chamber 61 of the first dust collector 21 is also provided with a second inlet 614. The second inlet 614 is connected to the first space 601. The first backflush pipe 521 is connected to the second inlet 614 and is used to input protective gas into the first space 601 of the first dust collector 21 to impact the first filter holes on the first filter element 62 and prevent the first filter holes from being blocked by the material 7.

[0058] It should be noted that when the mixture of material 7 and protective gas enters the second space 602 of the first dust collector 21 through the first inlet 611, some material 7 will adhere to the outer surface of the first filter element 62 due to being blocked by the first filter element 62, which may clog the first filter pores on the first filter element 62. In this embodiment, by setting the first backflush pipe 521, backflush gas can be provided to the first dust collector 21 (transported from the first backflush pipe 521 to the first dust collector 21). (The flow direction of the gas in 1 is opposite to the flow direction of the gas delivered from the first inlet pipe 511 to the first dust collector 21). It can be understood that when protective gas (e.g., in the form of pulse gas) is introduced into the first space 601 of the first dust collector 21 through the second inlet 614, the protective gas will enter the first groove 621 of the first filter element 62 and exert a force on the first filter element 62 in the direction from the inner surface to the outer surface, thereby causing the material 7 attached to the outer surface of the first filter element 62 to be impacted and fall off the surface of the first filter element 62.

[0059] Please see Figure 1 and Figure 2 For example, the first backflush pipe 521 is equipped with a first pulse valve 24, meaning that the gas entering the first dust collector 21 is pulse gas. Because the pulse gas has a strong impact force, it can produce a strong impact effect on the first filter element 62, causing the material 7 attached to the outer surface of the first filter element 62 to fall off as much as possible. For example, the first pulse valve 24 is controlled by a pulse meter.

[0060] Please see Figure 1 and Figure 2 For example, the first backflush pipeline 521 is also provided with an air inlet valve 26, a pressure reducing valve 25 and an air storage tank 28. In the direction of fluid flow, the air inlet valve 26, the pressure reducing valve 25, the air storage tank 28 and the first pulse valve 24 are arranged in sequence. The air inlet valve 26 is used to open or close the gas supply. The pressure reducing valve 25 is used to reduce the pressure of the high-pressure gas in the upstream pipeline to the stable pressure required by the system. The air storage tank 28 is used to store high-pressure gas to make up for the instantaneous demand of insufficient flow of the pressure reducing valve 25. The first pulse valve 24 is used to convert the stable airflow of the air storage tank 28 into a high-frequency pulse.

[0061] Please see Figure 1 and Figure 4 The material conveying system further includes a second dust collector 12, which includes a second cavity 71 with a second inner cavity 710. The second cavity 71 is provided with a first inlet / outlet 711 and a second outlet 712. The first inlet / outlet 711 and the second outlet 712 are both connected to the second inner cavity 710. The second outlet 712 is located above the first inlet / outlet 711. The top of the temporary storage bin 43 is provided with a second inlet / outlet, which is connected to the first inlet / outlet 711. When the mixture of material 7 and gas in the temporary storage bin 43 enters the second dust collector 12 through the second inlet / outlet and the first inlet / outlet 711, the material 7 and gas separate. The material 7 falls downward and returns to the temporary storage bin 43 through the first inlet / outlet 711 and the second inlet / outlet, while the gas is discharged from the second outlet 712.

[0062] For example, the second dust collector 12 is disposed above the temporary storage chamber 43.

[0063] It should be noted that in the initial stage of the material conveying system operation, protective gas needs to be introduced into the temporary storage bin 43 to replace the air in the temporary storage bin 43, thereby reducing the air content in the temporary storage bin 43 or completely expelling the air in the temporary storage bin 43, so as to prevent the material 7 stored in the temporary storage bin 43 from being oxidized by oxygen in the air. It can be understood that while protective gas is introduced into the temporary storage bin 43, a fluid formed by the mixture of gas and a small amount of material 7 will be formed in the temporary storage bin 43. This part of the fluid is discharged from the second inlet and outlet of the temporary storage bin 43, and the gas and material 7 are separated in the second dust collector 12. The gas is discharged from the second outlet 712 of the second dust collector 12, and the material 7 returns to the temporary storage bin 43 through the first inlet and outlet 711 of the second dust collector 12 and the second inlet and outlet of the temporary storage bin 43, thereby completing the replacement of gas in the temporary storage bin 43 and avoiding the loss of material 7.

[0064] Please see Figure 4 The second dust collector 12 further includes a second filter element 72 and a second connector 73 located within the second cavity 71. The second connector 73 is disposed around the second filter element 72 and connects the second filter element 72 and the second cavity 71. The second filter element 72 is provided with a plurality of second filter holes. The second connector 73 vertically divides the second inner cavity 710 of the second dust collector 12 into a third space 703 located above and a fourth space 704 located below. The second air outlet 712 communicates with the third space 703, and the second inlet / outlet communicates with the fourth space 704.

[0065] Understandably, when the mixture of material 7 and protective gas enters the fourth space 704 of the second dust collector 12 through the second inlet and outlet, the gas in the mixture will automatically flow upward. After passing through the second filter hole on the second filter element 72, the gas enters the third space 703 and is discharged from the second dust collector 12 through the second outlet 712. The particle size of material 7 in the mixture is larger than the size of the second filter hole on the second filter element 72. Therefore, material 7 cannot pass through the second filter element 72. At this time, material 7 will be collected in the fourth space 704 and discharged from the second inlet and outlet.

[0066] In some embodiments, the second connector 73 may also be provided with multiple filter holes to enhance the filtration capacity of the second dust collector 12.

[0067] Please see Figure 4 For example, the second filter element 72 has a second groove 721, and a plurality of second filter holes are distributed on the groove wall and / or bottom of the second groove 721. All the second filter holes communicate with the second groove 721, and the opening of the second groove 721 communicates with the fourth space 704. It is understood that by having a second groove 721 in the second filter element 72 and distributing a plurality of second filter holes on the groove wall and / or bottom of the second groove 721, the filtration area of ​​the second filter element 72 can be increased within a limited space, thereby improving its filtration capacity.

[0068] Please see Figure 1 and Figure 4 The material conveying system further includes a second backflush pipe 522. The second chamber 71 of the second dust collector 12 is also provided with a third inlet 713. The third inlet 713 is connected to the third space 703. The second backflush pipe 522 is connected to the third inlet 713 and is used to input protective gas into the third space 703 of the second dust collector 12 to impact the second filter holes on the second filter element 72 and prevent the second filter holes from being blocked by the material 7.

[0069] It should be noted that when the mixture of material 7 and protective gas enters the fourth space 704 of the second dust collector 12 through the third inlet 713, material 7 will be blocked on the outer surface of the second filter element 72, causing some material 7 to adhere to the outer surface of the second filter element 72, which may block the second filter pores on the second filter element 72. In this embodiment, by setting a second backflush pipe 522, backflush gas can be provided to the second dust collector 12 (transported from the second backflush pipe 522 to the second dust collector 12). (The gas flow direction in the dust collector 12 is opposite to the gas flow direction from the temporary storage chamber 43 to the second dust collector 12.) It can be understood that when protective gas (e.g., in the form of pulse gas) is introduced into the third space 703 of the second dust collector 12 through the third inlet 713, the protective gas will enter the second groove 721 of the second filter element 72 and exert a force on the second filter element 72 in the direction from the inner surface to the outer surface, thereby causing the material 7 attached to the outer surface of the second filter element 72 to be impacted and fall off the surface of the second filter element 72.

[0070] Please see Figure 1 and Figure 2 For example, the second backflush pipe 522 is equipped with a second pulse valve 11, meaning that the gas entering the second dust collector 12 is pulse gas. Because the pulse gas has a strong impact force, it can produce a strong impact effect on the second filter element 72, causing the material 7 attached to the outer surface of the second filter element 72 to fall off as much as possible. For example, the second pulse valve 11 is controlled by a pulse meter.

[0071] Please see Figure 1 and Figure 2 For example, the first backflush line 521 and the second backflush line 522 are arranged in parallel, and both the first backflush line 521 and the second backflush line 522 are connected to the first gas supply line 523.

[0072] Please see Figure 1 and Figure 2 For example, the first air intake pipe 511 is connected to the second air supply pipe 512, and the first air supply pipe 523 and the second air supply pipe 512 are connected in parallel and both are connected to the main air intake pipe 53.

[0073] Please see Figure 1 and Figure 2For example, the second gas supply pipe 512 is provided with a main gas inlet valve 4 and a proportional gas inlet valve 3. The main gas inlet valve 4 and the proportional gas inlet valve 3 are arranged in sequence according to the gas flow direction. The main gas inlet valve 4 serves as a main switch and can open or close the gas supply of the first gas inlet pipe 511, which is convenient for equipment debugging, maintenance or cutting off the gas source in an emergency. The proportional gas inlet valve 3 adjusts the flow rate or pressure of the protective gas proportionally according to the input signal (such as electrical signal or gas pressure signal) to achieve continuous and dynamic control. For example, the main gas inlet valve 4 is a manual valve and the proportional gas inlet valve 3 is an electric control valve.

[0074] Please see Figure 1 and Figure 2 For example, a gas flow meter 2 is provided on the intake manifold 53 to monitor the gas flow rate in the intake manifold 53.

[0075] Please see Figure 1 and Figure 2 The material conveying system further includes a return air pipeline, which includes a return air main pipe 54, return air branch pipes and a first exhaust pipe 545. One end of the return air main pipe 54 is connected to the first air outlet 612 of the first dust collector 21. The return air branch pipes and the first exhaust pipe 545 are connected in parallel and are both connected to the return air main pipe 54. The return air branch pipes are connected to the first air inlet pipe 511. The first exhaust pipe 545 is equipped with an air venting proportional valve 37.

[0076] Understandably, by setting up a return gas branch pipe to connect to the first air inlet pipe 511, the protective gas separated in the first dust collector 21 can be recycled, so that the protective gas can continue to serve as a power source for transporting other materials 7.

[0077] For example, the first exhaust pipe 545 is connected to the atmosphere.

[0078] It is understandable that by setting the first exhaust pipe 545, some gas can be discharged (e.g., discharged into the atmosphere) when the pressure inside the material conveying system is too high, thereby keeping the pressure inside the system within a reasonable range. By setting the venting proportional valve 37 on the first exhaust pipe 545, the flow rate of the discharged gas can be controlled by the venting proportional valve 37.

[0079] Please see Figure 1 and Figure 2The return air branch pipe includes a first main pipe 541, a first branch pipe 542, and a replacement air pipe 543. The first main pipe 541 and the first exhaust pipe 545 are connected in parallel and are both connected to the return air main pipe 54. The first branch pipe 542 and the replacement air pipe 543 are connected in parallel and are both connected to the first main pipe 541. The first branch pipe 542 is connected to the first intake pipe 511. The temporary storage chamber 43 is provided with an air exchange port, and the replacement air pipe 543 is connected to the air exchange port.

[0080] It should be noted that by setting an air exchange port on the temporary storage bin 43 and connecting the air exchange port with the replacement air pipe 543 in the return air pipeline, the protective gas in the return air pipeline can be used to replace the air in the temporary storage bin 43 in the initial stage of the material conveying system operation, thereby reducing the air content in the temporary storage bin 43 or completely expelling the air in the temporary storage bin 43, so as to prevent the material 7 stored in the temporary storage bin 43 from being oxidized by oxygen in the air.

[0081] Please see Figure 1 and Figure 2 For example, the displacement gas pipe 543 is provided with a displacement gas control valve 39, which is used to control whether the protective gas enters the temporary storage chamber 43 and the flow rate of the protective gas entering the temporary storage chamber 43. It should be noted that when the material conveying system has been running for a period of time and the air inside the temporary storage chamber 43 has been completely discharged, the displacement gas control valve 39 can be closed.

[0082] Please see Figure 1 and Figure 2 For example, the first branch pipe 542 is provided with a return gas control valve 38, which is used to control whether the protective gas recovered from the first dust collector 21 flows back into the first inlet pipe 511 and the flow rate of the returned gas. For example, the return gas control valve 38 can be a manual valve.

[0083] Please see Figure 1 and Figure 2 For example, the first air intake pipe 511, the first branch pipe 542 and the second air supply pipe 512 are connected by a three-way valve.

[0084] Please see Figure 1 and Figure 2 The return gas main pipe 54 is equipped with a heat exchanger 29 and a fan 34, and the heat exchanger 29 and the fan 34 are arranged alternately along the direction of gas flow.

[0085] It should be noted that the purpose of setting up the heat exchanger 29 is to reduce the temperature of the gas in the return gas main 54 to avoid the gas temperature being too high and affecting the service life of the fan 34.

[0086] It is understandable that by installing a fan 34 on the return gas main pipe 54, the suction effect of the fan 34 can be used to generate negative pressure in the first dust collector 21, thereby promoting the discharge of protective gas and accelerating the separation of protective gas and material 7.

[0087] Please see Figure 1 and Figure 2 For example, a second temperature transmitter 23 and a second pressure transmitter 22 are provided on the section of the return gas main 54 near the first gas outlet 612 of the first dust collector 21. The second temperature transmitter 23 is used to monitor the temperature of the gas discharged from the first gas outlet 612 of the first dust collector 21, and the second pressure transmitter 22 is used to monitor the pressure of the gas discharged from the first gas outlet 612 of the first dust collector 21.

[0088] Please see Figure 1 and Figure 2 For example, a third temperature transmitter 31 and a third pressure transmitter 30 are provided on the section of the return gas main 54 between the outlet of the heat exchanger 29 and the inlet of the fan 34. The third temperature transmitter 31 is used to monitor the temperature of the gas discharged from the outlet of the heat exchanger 29 to avoid the gas temperature being too high and affecting the service life of the fan 34. The third pressure transmitter 30 is used to monitor the pressure of the gas discharged from the outlet of the heat exchanger 29.

[0089] Please see Figure 1 and Figure 2 For example, a dew point meter 32 and an oxygen analyzer 33 are provided on the section of the return gas main 54 between the outlet of the heat exchanger 29 and the inlet of the fan 34. The dew point meter 32 is used to monitor the moisture content of the gas in the return gas main 54 to avoid the moisture content in the system exceeding the standard. The oxygen analyzer 33 is used to monitor the oxygen content of the gas in the return gas main 54 to avoid the oxygen content in the system exceeding the standard.

[0090] Please see Figure 1 and Figure 2 For example, a fourth temperature transmitter 36 and a fourth pressure transmitter 35 are provided on the section of the return gas main 54 after the outlet of the fan 34. These are used to monitor the temperature of the gas discharged from the outlet of the heat exchanger 29 to avoid the gas temperature being too high and affecting the service life of the fan 34. The fourth pressure transmitter 35 is used to monitor the pressure of the gas discharged from the outlet of the heat exchanger 29.

[0091] Please see Figure 1 and Figure 2The material conveying system further includes a buffer bin 15, which is disposed between the first dust collector 21 and the temporary storage bin 43. The inlet of the buffer bin 15 is connected to the first outlet 613 of the first dust collector 21, and an upper valve 17 is provided between the inlet of the buffer bin 15 and the first outlet 613 of the first dust collector 21. The upper valve 17 is used to control the first dust collector 21 to feed material into the buffer bin 15. The outlet of the buffer bin 15 is connected to the second inlet of the temporary storage bin 43, and a lower valve 14 is provided between the outlet of the buffer bin 15 and the second inlet of the temporary storage bin 43. The lower valve 14 is used to control the buffer bin 15 to feed material into the temporary storage bin 43. During the operation of the material conveying system, at the same time, one of the upper valve 17 and the lower valve 14 is in a closed state and the other is in an open state.

[0092] It is understandable that by setting a buffer chamber 15 between the first dust collector 21 and the temporary storage chamber 43, and setting an upper valve 17 between the buffer chamber 15 and the first dust collector 21, and setting a lower valve 14 between the buffer chamber 15 and the temporary storage chamber 43, when the upper valve 17 is in the open state, the lower valve 14 is in the closed state. At this time, the first dust collector 21 feeds material into the buffer chamber 15. Since there is airflow in the first dust collector 21, and some airflow may enter the buffer chamber 15 during feeding, closing the lower valve 14 can prevent the airflow in the buffer chamber 15 from entering the temporary storage chamber 43 and causing air leakage. When air leakage occurs, the uniformity of the material output from the temporary storage chamber 43 will be affected, thereby affecting the uniformity of the feeding of the pre-carbonization device. When the upper valve 17 is closed, the lower valve 14 is open. At this time, the buffer chamber 15 feeds material into the temporary storage chamber 43. Since the upper valve 17 is closed, the first dust collector 21 is isolated from the buffer chamber 15. Therefore, the airflow in the first dust collector 21 cannot enter the buffer chamber 15, and there will be no airflow phenomenon caused by the airflow rushing into the temporary storage chamber 43.

[0093] Please see Figure 1 and Figure 2 An acceleration chamber 6 is provided on the first air intake pipe 511. The acceleration chamber 6 has an air inlet, a first feed inlet, and a mixture outlet. Protective gas enters the acceleration chamber 6 through the air inlet, and material 7 enters the acceleration chamber 6 through the first feed inlet. The material 7 and the protective gas are mixed in the acceleration chamber 6 to form a mixture, and the mixture is discharged from the mixture outlet.

[0094] For example, the acceleration chamber 6 includes a vertically arranged feed pipe and a horizontally arranged conveying pipe. The feed pipe is a tapered pipe structure that gradually expands in diameter from top to bottom. When the material 7 falls from the material 7 inlet of the feed pipe, it can be evenly distributed and evenly mixed with the protective gas entering from the air inlet. Then it is conveyed to the downstream from the mixture outlet, which can accelerate the feeding of the material 7 and reduce the pressure loss of the gas.

[0095] Please see Figure 1 and Figure 2 The first intake pipe 511 is also equipped with an intake control valve 5, which is located upstream of the acceleration chamber 6. For example, the intake control valve 5 is a manual valve.

[0096] Please see Figure 1 and Figure 2 The material conveying system also includes an air hammer 40 and a compressed gas pipeline 56. The air hammer 40 is located on the outside of the temporary storage bin 43 and is used to strike the outer wall of the temporary storage bin 43 to disperse the material 7 inside the temporary storage bin 43. The compressed gas pipeline 56 is connected to the air hammer 40 and is used to provide gas power to the air hammer 40.

[0097] It should be noted that when material 7 is placed statically in the temporary storage bin 43, it is prone to bridging (material 7 piles up into an arch shape, hindering the discharge) or clumping due to gravity, humidity, or interparticle friction. In this embodiment, an air hammer 40 is installed outside the temporary storage bin 43. The air hammer 40 uses compressed gas to drive the hammer head to strike the bin wall at a high frequency, generating mechanical vibration, which breaks the binding force between materials 7, causing the bridging to collapse and the clumping to loosen, ensuring that material 7 falls smoothly, thereby ensuring the smooth conveying of material 7.

[0098] Please see Figure 1 and Figure 2 For example, the compressed gas pipeline 56 is provided with a compressed gas control valve 27 to control the opening and closing of the compressed gas or to control the flow rate of the compressed gas. For example, the compressed gas control valve 27 is a manual valve and the compressed gas is compressed air.

[0099] For example, the temporary storage bin 43 also has a second discharge port for discharging the material 7 stored in the temporary storage bin 43.

[0100] Please see Figure 1 and Figure 2 For example, the material conveying system further includes a discharge pipe, which is connected to the second discharge port of the temporary storage bin 43. The discharge pipe is equipped with an electric discharge valve 41 and a manual discharge valve 42. The electric discharge valve 41 is interlocked with the automation system to achieve automatic discharge, and the manual discharge valve 42 is mainly used for manual control during emergency operation or maintenance.

[0101] For example, the end of the discharge pipe opposite to the temporary storage bin 43 is connected to a pre-carbonization device (not shown), which is used to transport the material 7 (e.g., secondary particles) stored in the temporary storage bin 43 to the pre-carbonization device for pre-carbonization treatment.

[0102] Please see Figure 1 and Figure 2 For example, the temporary storage bin 43 is provided with a weighing module 10 to weigh the material 7 in the temporary storage bin 43.

[0103] Please see Figure 1 and Figure 2 For example, the material conveying system further includes a second exhaust pipe 551, which is connected to the second outlet 712 of the second dust collector 12, for discharging the protective gas discharged from the second outlet 712 into the atmosphere.

[0104] Please see Figure 1 and Figure 2 For example, the first exhaust pipe 545 and the second exhaust pipe 551 are connected in parallel and are both connected to the exhaust manifold 552, which is open to the atmosphere.

[0105] Please see Figure 1 and Figure 2 For example, a flexible connection 13 is provided on the pipe section of the second exhaust pipe 551 near the temporary storage chamber 43, a flexible connection 13 is provided on the pipe section of the connecting pipe between the outlet of the buffer chamber 15 and the second inlet of the temporary storage chamber 43 near the temporary storage chamber 43, and a flexible connection 13 is provided on the pipe section of the replacement gas pipe 543 near the temporary storage chamber 43.

[0106] It should be noted that when a rigid pipe is rigidly connected to the temporary storage bin 43, the rigid connection disrupts the independent force-bearing system of the weighing module 10, causing additional mechanical forces from the rigid pipe to participate in the weighing process. For example, the weight of the pipe, thermal expansion and contraction stress, and fluid impact pressure will be directly transmitted to the temporary storage bin 43, resulting in inaccurate weighing data from the weighing module 10. This embodiment of the application avoids the problem of inaccurate weighing data from the weighing module 10 caused by the rigid connection between the rigid pipe and the temporary storage bin 43 by providing flexible connections 13 in the aforementioned multiple pipes connected to the temporary storage bin 43, thus ensuring the accuracy of the weighing module 10 in weighing the material 7 within the temporary storage bin 43.

[0107] For example, at least one of the following: the second gas supply pipe 512, the first backflush pipe 521, the second backflush pipe 522, the first gas supply pipe 523, the main inlet pipe 53, the main return pipe 54, the first main pipe 541, the first branch pipe 542, and the displacement pipe 543, is also provided with an insulation layer on its outer surface to maintain the temperature of the material 7 during transportation and prevent heat loss. For example, the insulation layer is made of rock wool, slag wool, aluminum silicate fiber, expanded perlite, or composite silicate, etc.

[0108] For example, the protective gas includes at least one of nitrogen (N2) and an inert gas, wherein the inert gas includes at least one of argon (Ar) and helium (He). It is understood that material 7 (e.g., secondary particles) is highly susceptible to oxidation by oxygen when exposed to high temperatures. This embodiment of the application uses a protective gas to transport material 7, which can prevent the oxidation of material 7.

[0109] Please combine Figures 1 to 4 This application also provides a material conveying method, implemented using the above-described material conveying system, the material conveying method comprising:

[0110] Material 7 and protective gas are mixed in the first inlet pipe 511, and the material 7 is transported to the first dust collector 21 by the power of the protective gas.

[0111] The material 7 and the protective gas are separated by the first dust collector 21, so that the protective gas is discharged from the first outlet 612 of the first dust collector 21, and the material 7 is discharged from the first discharge port 613 of the first dust collector 21 and enters the temporary storage bin 43 for storage.

[0112] For example, at least a portion of the protective gas discharged from the first outlet 612 of the first dust collector 21 is delivered to the first inlet pipe 511 to recycle the protective gas.

[0113] For example, when the pressure inside the material conveying system exceeds a predetermined value, a portion of the protective gas discharged from the first outlet 612 of the first dust collector 21 is released into the external environment.

[0114] For example, the first dust collector 21 is provided with a first filter element 62, which has a plurality of first filter holes. The first filter element 62 has a first side and a second side arranged opposite to each other. The gas delivered to the first dust collector 21 from the first air inlet pipe 511 enters the second side from the first side of the first filter element 62. A protective gas is introduced into the first dust collector 21 through a first backflush pipe 521. The gas delivered to the first dust collector 21 from the first backflush pipe 521 enters the first side from the second side of the first filter element 62 to avoid the first filter holes on the first filter element 62 being blocked.

[0115] For example, when the first filter element 62 has a first groove 621, the first side refers to the outer surface side of the first filter element 62, and the second side refers to the inner surface side of the first filter element 62.

[0116] For example, at the initial stage of material 7 conveying, a portion of the protective gas discharged from the first outlet 612 of the first dust collector 21 is conveyed to the temporary storage chamber 43 to replace the air in the temporary storage chamber 43.

[0117] For example, the top of the temporary storage bin 43 is provided with a second inlet and outlet. The protective gas discharged from the first outlet 612 of the first dust collector 21 mixes with part of the material 7 in the temporary storage bin 43 to form a fluid. The fluid enters the second dust collector 12 through the second inlet and outlet to separate the material 7 and the protective gas. The protective gas is discharged from the second outlet 712 of the second dust collector 12. The material 7 returns to the temporary storage bin 43 through the first inlet and outlet 711 of the second dust collector 12 and the second inlet and outlet of the temporary storage bin 43.

[0118] For example, the second dust collector 12 is provided with a second filter element 72, which has a plurality of second filter holes. The second filter element 72 has a third side and a fourth side arranged opposite to each other. The gas delivered to the second dust collector 12 from the second air inlet pipe enters the fourth side from the third side of the second filter element 72. A protective gas is introduced into the second dust collector 12 through a second backflush pipe 522. The gas delivered to the second dust collector 12 from the second backflush pipe 522 enters the third side from the fourth side of the second filter element 72 to avoid the second filter holes on the second filter element 72 from being blocked.

[0119] For example, when the second filter element 72 has a second groove 721, the third side refers to the outer surface side of the second filter element 72, and the fourth side refers to the inner surface side of the second filter element 72.

[0120] The material conveying system provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A material conveying system, characterized in that, Includes the first air intake pipe, the first dust collector, and a temporary storage bin; The first air inlet pipe is used to mix the protective gas and the material in the pipe and use the power of the protective gas to transport the material. The first air inlet pipe is provided with a first feed port, through which the material enters the first air inlet pipe. The first dust collector includes a first inlet, a first air outlet, and a first discharge outlet. The first air inlet pipe is connected to the first inlet, so that the mixture of material and protective gas in the first air inlet pipe enters the first dust collector through the first inlet. The material and protective gas in the mixture are separated in the first dust collector. The protective gas is discharged from the first air outlet, and the material is discharged from the first discharge outlet. The temporary storage bin has a second inlet, which is connected to the first outlet of the first dust collector. The temporary storage bin is used to store materials discharged from the first dust collector. The outer surface of the first air intake pipe is provided with a heat insulation layer.

2. The material conveying system according to claim 1, characterized in that, The first dust collector further includes a first cavity, a first filter element and a first connector located in the first cavity. The first connector is disposed around the first filter element and connects the first filter element and the first cavity. The first filter element is provided with a plurality of first filter holes. The first connector vertically divides the first inner cavity of the first dust collector into a first space located above and a second space located below; The first cavity is provided with a first inlet, a first air outlet and a first material outlet. The first air outlet is connected to the first space, the first inlet and the first material outlet are connected to the second space, and the first material outlet is located below the first inlet.

3. The material conveying system according to claim 2, characterized in that, The first filter element has a first groove, and a plurality of first filter holes are distributed on the groove wall and / or the bottom of the first groove. All the first filter holes are connected to the first groove, and the opening of the first groove is connected to the first space; and / or, The material conveying system further includes a first backflush pipe, and the first chamber of the first dust collector is provided with a second inlet. The second inlet is connected to the first space, and the first backflush pipe is connected to the second inlet. It is used to input protective gas into the first space of the first dust collector to impact the first filter holes on the first filter element and prevent the first filter holes from being blocked by material.

4. The material conveying system according to claim 1, characterized in that, The material conveying system further includes a second dust collector, which includes a second cavity with a second inner cavity. The second cavity is provided with a first inlet and a second outlet. The first inlet and the second outlet are both connected to the second inner cavity, and the second outlet is located above the first inlet. The top of the temporary storage chamber is provided with a second inlet and outlet, which is connected to the first inlet and outlet. When the mixture of material and gas in the temporary storage chamber enters the second dust collector through the second inlet and outlet and the first inlet and outlet, the material and gas are separated. The material falls downward and returns to the temporary storage chamber through the first inlet and outlet and the second inlet and outlet, while the gas is discharged from the second outlet.

5. The material conveying system according to claim 4, characterized in that, The second dust collector also includes a second filter element and a second connector located in the second cavity. The second connector is disposed around the second filter element and connects the second filter element and the second cavity. The second filter element is provided with a plurality of second filter holes. The second connector vertically divides the second inner cavity of the second dust collector into a third space located above and a fourth space located below. The second air outlet connects to the third space, and the second inlet / outlet connects to the fourth space.

6. The material conveying system according to claim 5, characterized in that, The second filter element has a second groove, and a plurality of second filter holes are distributed on the groove wall and / or the bottom of the second groove. All the second filter holes are connected to the second groove, and the opening of the second groove is connected to the fourth space; and / or, The material conveying system also includes a second backflush pipe, and the second chamber of the second dust collector is provided with a third inlet. The third inlet is connected to the third space, and the second backflush pipe is connected to the third inlet. It is used to input protective gas into the third space of the second dust collector to impact the second filter holes on the second filter element and prevent the second filter holes from being blocked by material.

7. The material conveying system according to claim 1, characterized in that, The material conveying system also includes a return air pipeline, which includes a main return air pipe, a branch return air pipe, and a first exhaust pipe. One end of the main return air pipe is connected to the first air outlet of the first dust collector. The branch return air pipe and the first exhaust pipe are connected in parallel and are both connected to the main return air pipe. The branch return air pipe is connected to the first air inlet pipeline. The first exhaust pipe is equipped with a venting proportional valve.

8. The material conveying system according to claim 7, characterized in that, The return air branch pipe includes a first main pipe, a first branch pipe, and a displacement air pipe. The first main pipe is connected in parallel with the first exhaust pipe and is also connected to the return air main pipe. The first branch pipe and the displacement air pipe are connected in parallel with the first main pipe. The first branch pipe is connected to the first intake pipe. The temporary storage chamber is equipped with a ventilation port, and the replacement gas pipe is connected to the ventilation port. The replacement gas pipe is equipped with a replacement gas control valve; and / or, The return gas main is equipped with a heat exchanger and a fan, which are arranged at intervals along the direction of gas flow.

9. The material conveying system according to any one of claims 1-8, characterized in that, The material conveying system also includes a buffer bin, which is disposed between the first dust collector and the temporary storage bin; The inlet of the buffer chamber is connected to the first outlet of the first dust collector, and an upper valve is provided between the inlet of the buffer chamber and the first outlet of the first dust collector. The upper valve is used to control the first dust collector to feed material into the buffer chamber. The outlet of the buffer bin is connected to the second inlet of the temporary storage bin, and a lower valve is provided between the outlet of the buffer bin and the second inlet of the temporary storage bin. The lower valve is used to control the feed of the buffer bin to the temporary storage bin. During the operation of the material conveying system, at the same time, one of the upper valve and the lower valve is in the closed state and the other is in the open state.

10. The material conveying system according to any one of claims 1-8, characterized in that, An acceleration chamber is provided on the first air inlet pipe. The acceleration chamber has an air inlet, a first feed inlet, and a mixture outlet. Protective gas enters the acceleration chamber through the air inlet, and material enters the acceleration chamber through the first feed inlet. The material and the protective gas are mixed in the acceleration chamber to form a mixture, and the mixture is discharged from the mixture outlet. And / or, The material conveying system also includes an air hammer and a compressed gas pipeline. The air hammer is located on the outside of the temporary storage bin and is used to strike the outer wall of the temporary storage bin to disperse the material inside the temporary storage bin. The compressed gas pipeline is connected to the air hammer and is used to provide gas power to the air hammer.

Images