Material conveying system and material conveying method

Abstract

The embodiment of the invention provides a material conveying system and a material conveying method. The material conveying system comprises a first air inlet pipeline, a first dust remover and a temporary storage bin; a first feeding opening is formed in the first air inlet pipeline, and materials enter the first air inlet pipeline through the first feeding opening; the first dust remover comprises a first inlet, a first gas outlet and a first discharge port, the first gas inlet pipeline is communicated with the first inlet, materials and protective gas in the mixture are separated in the first dust remover, the protective gas is discharged from the first gas outlet, and the materials are discharged from the first discharge port; the temporary storage bin is provided with a second feeding port, the second feeding port is communicated with the first discharging port of the first dust remover, and the temporary storage bin is used for storing materials discharged from the first dust remover. According to the material conveying system provided by the embodiment of the invention, the protective gas is adopted for protecting the materials, the materials are prevented from being oxidized under the high-temperature condition, and therefore the material conveying system can be suitable for conveying the materials under the high-temperature condition, and energy waste caused by first cooling and then heating is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of material conveying, and in particular to a material conveying system and a material conveying method. Background Art

[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 market. Lithium-ion battery anode materials act as carriers of lithium ions and electrons during charging, storing and releasing energy. They are a key raw material for lithium-ion batteries. Currently, lithium-ion battery anode materials primarily consist of natural graphite and artificial graphite, with artificial graphite accounting for a higher proportion.

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

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

[0005] In a first aspect, an embodiment of the present application provides a material conveying system, comprising a first air intake pipeline, a first dust collector, and a temporary storage bin;

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

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

[0008] The temporary storage bin has a second feed port, the second feed port is connected to the first discharge port of the first dust collector, and the temporary storage bin is used to store materials discharged from the first dust collector;

[0009] The protective gas includes at least one of nitrogen and an inert gas.

[0010] In some embodiments, the first dust collector further includes a first cavity, a first filter element located in the first cavity, and a first connector, the first connector being disposed on the periphery of the first filter element and connecting the first filter element and the first cavity, the first filter element being provided with a plurality of first filter holes;

[0011] The first connecting member 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 discharge port. The first air outlet is connected to the first space. The first inlet and the first discharge port are connected to the second space. Moreover, the first discharge port is arranged below the first inlet.

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

[0014] The material conveying system further includes a first backflush pipeline, the first cavity of the first dust collector is further provided with a second inlet, the second inlet is connected to the first space, the first backflush pipeline is connected to the second inlet, and 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 to prevent the first filter holes from being blocked by material; and / or,

[0015] The first dust collector is equipped with a differential pressure gauge, which is used to detect the pressure difference between the first space and the second space.

[0016] 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 air outlet, the first inlet and the second air outlet being both in communication with the second inner cavity, and the second air outlet being provided above the first inlet;

[0017] A second entrance and exit is provided on the top of the temporary storage bin, and the second entrance and exit are connected to the first entrance and exit. When the mixture of material and gas in the temporary storage bin enters the second dust collector through the second entrance and exit and the first entrance and exit, the material and gas are separated, the material falls downward and returns to the temporary storage bin through the first entrance and exit and the second entrance and exit, and the gas is discharged from the second outlet.

[0018] In some embodiments, the second dust collector further includes a second filter element and a second connecting member located in the second cavity, the second connecting member being disposed on the periphery of the second filter element and connecting the second filter element and the second cavity, and the second filter element being provided with a plurality of second filter holes;

[0019] The second connecting member 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 is connected to the third space, and the second inlet and outlet are connected to the fourth space.

[0020] In some embodiments, the second filter element has a second groove, a plurality of second filter holes are distributed on the groove wall and / or groove bottom of the second groove, the plurality of second filter holes are connected to the second groove, and the opening of the second groove is connected to the fourth space; and / or,

[0021] The material conveying system also includes a second backflush pipeline. The second cavity of the second dust collector is also provided with a third inlet, which is connected to the third space. The second backflush pipeline is connected to the third inlet and 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 to prevent the second filter holes from being blocked by materials.

[0022] In some embodiments, the material conveying system also includes a return air pipeline, which includes a return air main pipe, a return air branch pipe and a first exhaust pipe. One end of the return air main pipe is connected to the first air outlet of the first dust collector. The return air branch pipe and the first exhaust pipe are connected in parallel and are both connected to the return air main pipe. The return air branch pipe is connected to the first air inlet pipeline, and an emptying proportional valve is provided on the first exhaust pipe.

[0023] In some embodiments, the return air branch pipe includes a first main pipe, a first branch pipe, and a replacement air pipe, the first main pipe and the first exhaust pipe are connected in parallel to the return air main pipe, the first branch pipe and the replacement air pipe are connected in parallel to the first main pipe, and the first branch pipe is connected to the first intake pipe;

[0024] The temporary storage bin is provided with a ventilation port, the replacement gas pipe is connected to the ventilation port, and the replacement gas pipe is provided with a replacement gas control valve; and / or,

[0025] The return air main pipe is provided with a heat exchanger and a fan, and the heat exchanger and the fan are sequentially spaced apart along the direction of gas flow.

[0026] 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;

[0027] The inlet of the buffer bin is connected to the first discharge port of the first dust collector, and an upper valve is provided between the inlet of the buffer bin and the first discharge port of the first dust collector, and the upper valve is used to control the first dust collector to feed the buffer bin;

[0028] The outlet of the buffer bin is connected to the second feed port of the temporary storage bin, and a lower valve is provided between the outlet of the buffer bin and the second feed port of the temporary storage bin, and the lower valve is used to control the buffer bin to feed the temporary storage bin;

[0029] During the operation of the material conveying system, at the same time, one of the upper valve and the lower valve is in a closed state and the other is in an open state; and / or,

[0030] An acceleration chamber is provided on the first air inlet pipeline, the acceleration chamber having an air inlet, the first feed inlet, and a mixture outlet, the protective gas enters the acceleration chamber through the air inlet, the 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,

[0031] The material conveying system also includes an air hammer and a compressed gas pipeline. The air hammer is arranged on the outside of the temporary storage bin and is used to knock the outer wall of the temporary storage bin to disperse the material in the temporary storage bin. The compressed gas pipeline is connected to the air hammer and is used to provide gas power for the air hammer.

[0032] In a second aspect, an embodiment of the present application provides a material conveying method, comprising:

[0033] The material and the protective gas are mixed in the first air inlet pipeline, and the material is transported to the first dust collector by the power of the protective gas;

[0034] The first dust collector is used to separate the material and the protective gas, so that the protective gas is discharged from the first gas outlet of the first dust collector, and the material is discharged from the first material outlet of the first dust collector and enters the temporary storage bin for storage.

[0035] In some embodiments, at least a portion of the protective gas discharged from the first gas outlet of the first dust collector is conveyed to the first air inlet pipeline to recycle the protective gas; and / or,

[0036] When the pressure inside the material conveying system exceeds a predetermined value, a portion of the protective gas discharged from the first gas outlet of the first dust collector is discharged into the external environment.

[0037] In some embodiments, the first dust collector is provided with a first filter element, the first filter element is provided with a plurality of first filter holes, the first filter element has a first side and a second side oppositely disposed, and the gas transported from the first air inlet line to the first dust collector enters the second side from the first side of the first filter element;

[0038] A first backflush pipeline is used to input protective gas into the first dust collector, and the gas transported from the first backflush pipeline to the first dust collector enters the first side from the second side of the first filter element to prevent the first filter hole on the first filter element from being blocked.

[0039] In some embodiments, at the beginning of material transportation, a portion of the protective gas discharged from the first air outlet of the first dust collector is transported to the temporary storage bin to replace the air in the temporary storage bin.

[0040] In some embodiments, a second inlet and outlet is provided on the top of the temporary storage bin, and the protective gas discharged from the first air outlet of the first dust collector is mixed with part of the material in the temporary storage bin to form a fluid, and the fluid enters the second dust collector through the second inlet and outlet to separate the material and the protective gas, and the protective gas is discharged from the second air outlet of the second dust collector, and the material returns to the temporary storage bin through the first inlet and outlet of the second dust collector and the second inlet and outlet of the temporary storage bin.

[0041] The material conveying system provided in the embodiment of the present application adopts a first air inlet pipeline to mix the protective gas and the material in the pipeline, and uses the power of the protective gas to convey the material. The mixture of the protective gas and the material is first conveyed to the first dust collector for separation of the gas and the material, wherein the protective gas is discharged from the first air outlet of the first dust collector, and the material is discharged from the first material outlet of the first dust collector. The discharged material enters the temporary storage bin for temporary storage, waiting for the next process. The material conveying system uses protective gas to protect the material, isolate it from oxygen, and prevent the material from being oxidized under high temperature conditions. Therefore, it can be suitable for the transportation of materials (such as secondary particles) under high temperature conditions, avoiding energy waste caused by cooling first and then heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments.

[0043] Figure 1 This is a first identification schematic diagram of the material conveying system provided in an embodiment of the present application.

[0044] Figure 2 This is a second identification schematic diagram of the material conveying system provided in an embodiment of the present application.

[0045] Figure 3 A schematic structural diagram of the first dust collector provided in an embodiment of the present application.

[0046] Figure 4 A schematic structural diagram of the second dust collector provided in an embodiment of the present application.

[0047] Component Symbol Description:

[0048] 2. Gas flow meter; 3. Intake proportional valve; 4. Intake main valve; 5. Intake control valve; 6. Acceleration chamber; 7. Material; 10. Weighing module; 11. Second pulse valve; 12. Second dust collector; 13. Flexible connector; 14. Lower valve; 15. Buffer bin; 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 air control valve; 39. Replacement gas control valve; 40. Air hammer; 41. Electric unloading valve; 42. Manual unloading valve; 43. Temporary storage Warehouse; 511, first air inlet pipeline; 512, second air delivery pipeline; 521, first backflush pipeline; 522, second backflush pipeline; 523, first air delivery pipeline; 53, air inlet main pipe; 54, return air main pipe; 541, first main pipe; 542, first branch pipe; 543, replacement air pipe; 545, first exhaust pipe; 551, second exhaust pipe; 552, exhaust main pipe; 56, compressed gas pipeline; 61, first chamber; 611, first inlet; 612, first air outlet ; 613, first discharge port; 614, second inlet; 62, first filter element; 621, first groove; 63, first connecting piece; 610, first inner cavity; 601, first space; 602, second space; 71, second cavity; 711, first inlet and outlet; 712, second air outlet; 713, third inlet; 72, second filter element; 721, second groove; 73, second connecting piece; 710, second inner cavity; 703, third space; 704, fourth space. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0050] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0052] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0053] In the description of this specification, the description with reference to 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0054] See also Figure 1 and Figure 2 An embodiment of the present application provides a material conveying system, including a first air intake pipeline 511, a first dust collector 21 and a temporary storage bin 43.

[0055] See also Figure 1The first air inlet pipeline 511 is used to mix the protective gas and the material 7 in the pipeline and use the power of the protective gas to transport the material 7. A first feed port is provided on the first air inlet pipeline 511, and the material 7 enters the first air inlet pipeline 511 through the first feed port.

[0056] See also Figure 3 The first dust collector 21 includes a first inlet 611, a first air outlet 612 and a first discharge port 613. The first air inlet pipe 511 is connected to the first inlet 611. The mixture of material 7 and protective gas in the first air 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 air outlet 612, and the material 7 is discharged from the first discharge port 613.

[0057] See also Figure 1 and Figure 2 The temporary storage bin 43 has a second feed port, which is connected to the first discharge port 613 of the first dust collector 21 and is used to store the material 7 discharged from the first dust collector 21.

[0058] Illustratively, the shielding gas includes at least one of nitrogen and an inert gas, and the inert gas includes at least one of argon (Ar) and helium (He). It is understood that when the material 7 (e.g., secondary particles) is at a high temperature, it is very susceptible to oxidation by oxygen. In the embodiment of the present application, the shielding gas is used to transport the material 7 to avoid oxidation of the material 7.

[0059] Illustratively, the material 7 is particles (secondary particles) obtained by granulating raw materials during the production process of artificial graphite negative electrode materials, and the temperature of the material 7 is 600°C-650°C.

[0060] The material conveying system provided in the embodiment of the present application adopts a first air inlet pipeline 511 to mix the protective gas and the material 7 in the pipeline, and uses the power of the protective gas to convey the material 7. The mixture of the protective gas and the material 7 is first conveyed to the first dust collector 21 for separation of the gas and the material 7, wherein 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 material outlet 613 of the first dust collector 21. The discharged material 7 enters the temporary storage bin 43 for temporary storage, waiting for the next process. The material conveying system uses protective gas to protect the material 7, isolate it from oxygen, and prevent the material 7 from being oxidized under high temperature conditions, so that it can be suitable for the transportation of material 7 (such as secondary particles) under high temperature conditions, avoiding energy waste caused by cooling first and then heating.

[0061] See also Figure 1 and Figure 2 For example, a first temperature transmitter 16 and a first pressure transmitter 19 are provided on the first air inlet pipeline 511. The first temperature transmitter 16 is used to monitor the temperature of the mixture of the protective gas and the material 7 in the first air inlet pipeline 511, and the first pressure transmitter 19 is used to monitor the pressure of the mixture of the protective gas and the material 7 in the first air inlet pipeline 511.

[0062] See also Figure 3 The first dust collector 21 also includes a first cavity 61 and a first filter element 62 and a first connecting member 63 located in the first cavity 61. The first connecting member 63 is arranged on the periphery of 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 connecting member 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 port 613, the first air outlet 612 is connected to the first space 601, the first inlet 611 and the first discharge port 613 are connected to the second space 602, and the first discharge port 613 is arranged below the first inlet 611.

[0063] It can be understood 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, the protective gas in the mixture will automatically flow upward, and the protective gas passes through the first filter hole on the first filter element 62 and enters the first space 601, and is discharged from the first dust collector 21 through the first outlet 612. The particle size of the material 7 in the mixture is larger than the size of the first filter hole on the first filter element 62. Therefore, the material 7 cannot pass through the first filter element 62. At this time, the material 7 will be collected in the second space 602 and then discharged from the first outlet 613.

[0064] In some embodiments, a plurality of filter holes may be provided on the first connecting member 63 to enhance the filtering capability of the first dust collector 21 .

[0065] See also Figure 3For 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 groove bottom of the first groove 621. The plurality of first filter holes are all 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 the first groove 621 in the first filter element 62 and the plurality of first filter holes distributed on the groove wall and / or groove bottom of the first groove 621, the filtration area of ​​the first filter element 62 can be expanded within a limited space, thereby improving its filtration capacity.

[0066] See also Figure 1 and Figure 2 A differential pressure gauge 20 is installed on the first dust collector 21. The differential pressure gauge 20 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 hole of the first filter element 62 is blocked by the material 7 or whether the first filter element 62 is damaged. When the first filter element 62 is working normally, 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 hole 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 back-blowing gas, increase the air volume of the back-blowing gas, or reduce the feed amount. 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.

[0067] See also Figure 1 and Figure 3 The material conveying system also includes a first backflush pipeline 521. A second inlet 614 is also provided on the first cavity 61 of the first dust collector 21. The second inlet 614 is connected to the first space 601. The first backflush pipeline 521 is connected to the second inlet 614, which is used to input protective gas into the first space 601 of the first dust collector 21 to impact the first filter hole on the first filter element 62 to prevent the first filter hole from being blocked by the material 7.

[0068] 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, the material 7 will be blocked on the outer surface of the first filter element 62, so that a part of the material 7 will adhere to the outer surface of the first filter element 62, thereby possibly blocking the first filter hole on the first filter element 62; the embodiment of the present application can use the first backflush pipeline 521 to provide backflush gas to the first dust collector 21 (delivered from the first backflush pipeline 521 to the first dust collector 21). 1 is opposite to the flow direction of the gas delivered from the first air inlet line 511 to the first dust collector 21), it can be understood that when protective gas (for example, in the form of pulse gas) is input 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 apply a force from the inner surface to the outer surface to the first filter element 62, so that the material 7 attached to the outer surface of the first filter element 62 is impacted and falls off from the surface of the first filter element 62.

[0069] See also Figure 1 and Figure 2 For example, the first backflush line 521 is provided with a first pulse valve 24. This means that the gas entering the first dust collector 21 is pulsed gas. Because the pulsed gas has a strong impact force, it can have a strong impact 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.

[0070] See also Figure 1 and Figure 2 For example, the first backflush pipeline 521 is further provided with an air intake manual valve 26, a pressure reducing valve 25 and an air storage tank 28. In the flow direction of the fluid, the air intake manual valve 26, the pressure reducing valve 25, the air storage tank 28 and the first pulse valve 24 are arranged in sequence. The air intake manual valve 26 is used to open or close the gas supply. The pressure reducing valve 25 is used to reduce 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 for 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 high-frequency pulses.

[0071] See also Figure 1 and Figure 4The material conveying system also includes a second dust collector 12, which includes a second cavity 71, which has a second inner cavity 710, and a first inlet and outlet 711 and a second air outlet 712 are provided on the second cavity 71, and the first inlet and outlet 711 and the second air outlet 712 are both communicated with the second inner cavity 710, and the second air outlet 712 is arranged above the first inlet and outlet 711; a second inlet and outlet is provided on the top of the temporary storage bin 43, and the second inlet and outlet is communicated with the first inlet and 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 and outlet and the first inlet and outlet 711, the material 7 and the gas are separated, and the material 7 falls downward and returns to the temporary storage bin 43 through the first inlet and outlet 711 and the second inlet and outlet, and the gas is discharged from the second air outlet 712.

[0072] Exemplarily, the second dust collector 12 is disposed above the temporary storage bin 43 .

[0073] It should be noted that in the initial stage of operation of the material conveying system, it is necessary to introduce protective gas 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 exhausting the air in the temporary storage bin 43 to avoid the material 7 stored in the temporary storage bin 43 being oxidized by oxygen in the air; it can be understood that while introducing protective gas into the temporary storage bin 43, a fluid formed by a mixture of gas and a small amount of material 7 will be formed in the temporary storage bin 43, and this part of the fluid is discharged from the second inlet and outlet of the temporary storage bin 43, and the separation of gas and material 7 is completed in the second dust collector 12, so that the gas is discharged from the second air 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 the gas in the temporary storage bin 43 and avoiding the loss of material 7.

[0074] See also Figure 4 The second dust collector 12 also includes a second filter element 72 and a second connecting member 73 located in the second cavity 71. The second connecting member 73 is arranged on the periphery of 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 connecting member 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 is connected to the third space 703, and the second inlet and outlet are connected to the fourth space 704.

[0075] It can be understood that 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, and the gas passes through the second filter hole on the second filter element 72 and enters the third space 703, and is discharged from the second dust collector 12 through the second outlet 712. The particle size of the material 7 in the mixture is larger than the size of the second filter hole on the second filter element 72. Therefore, the material 7 cannot pass through the second filter element 72. At this time, the material 7 will be collected in the fourth space 704 and discharged from the second inlet and outlet.

[0076] In some embodiments, a plurality of filter holes may also be provided on the second connecting member 73 to enhance the filtering capability of the second dust collector 12 .

[0077] See also 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 groove bottom of the second groove 721. The plurality of second filter holes are all connected to the second groove 721, and the opening of the second groove 721 is connected to the fourth space 704. It can be understood that by having the second groove 721 in the second filter element 72 and the plurality of second filter holes distributed on the groove wall and / or groove bottom of the second groove 721, the filtration area of ​​the second filter element 72 can be expanded within a limited space, thereby improving its filtration capacity.

[0078] See also Figure 1 and Figure 4 The material conveying system also includes a second backflush pipeline 522. A third inlet 713 is also provided on the second cavity 71 of the second dust collector 12. The third inlet 713 is connected to the third space 703. The second backflush pipeline 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 to prevent the second filter holes from being blocked by the material 7.

[0079] 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, the material 7 will be blocked on the outer surface of the second filter element 72, so that a part of the material 7 will adhere to the outer surface of the second filter element 72, thereby possibly blocking the second filter hole on the second filter element 72; the embodiment of the present application can provide the second backflush gas to the second dust collector 12 by providing the second backflush gas (delivered from the second backflush gas line 522 to the second dust collector 12). The flow direction of the gas in the dust collector 12 is opposite to the flow direction of the gas transmitted from the temporary storage bin 43 to the second dust collector 12). It can be understood that when protective gas (for example, in the form of pulse gas) is input 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 apply a force from the inner surface to the outer surface to the second filter element 72, so that the material 7 attached to the outer surface of the second filter element 72 is impacted and falls off from the surface of the second filter element 72.

[0080] See also Figure 1 and Figure 2 Exemplarily, the second backflush line 522 is provided with a second pulse valve 11. This means that the gas entering the second dust collector 12 is pulsed gas. Because pulsed gas has a strong impact force, it can have a strong impact 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. Exemplarily, the second pulse valve 11 is controlled by a pulse meter.

[0081] See also Figure 1 and Figure 2 Exemplarily, the first backflush pipeline 521 and the second backflush pipeline 522 are arranged in parallel, and the first backflush pipeline 521 and the second backflush pipeline 522 are both connected to the first gas pipeline 523.

[0082] See also Figure 1 and Figure 2 For example, the first air intake pipe 511 is connected to the second air delivery pipe 512 , and the first air delivery pipe 523 and the second air delivery pipe 512 are connected in parallel and are both connected to the air intake manifold 53 .

[0083] See also Figure 1 and Figure 2, for example, the second gas supply pipe 512 is provided with an air intake main valve 4 and an air intake proportional valve 3, which are arranged in sequence according to the flow direction of the gas. The air intake main valve 4 serves as a main switch, which can open or close the gas supply of the first air intake pipeline 511, so as to facilitate equipment commissioning, maintenance or cutting off the gas source in an emergency. The air intake proportional valve 3 proportionally adjusts the flow rate or pressure of the protective gas according to the input signal (such as an electrical signal, an air pressure signal) to achieve continuous and dynamic control. For example, the air intake main valve 4 is a manual valve and the air intake proportional valve 3 is an electric control valve.

[0084] See also Figure 1 and Figure 2 For example, a gas flow meter 2 is provided on the intake manifold 53 for monitoring the gas flow in the intake manifold 53 .

[0085] See also Figure 1 and Figure 2 The material conveying system also includes a return air pipeline, which includes a return air main pipe 54, a return air branch pipe 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 pipe 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 pipe is connected to the first air inlet pipe 511. The first exhaust pipe 545 is provided with an emptying proportional valve 37.

[0086] It can be understood that by providing a return air branch pipe connected 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.

[0087] Exemplarily, the first exhaust pipe 545 is connected to the atmosphere.

[0088] It can be understood that by setting up the first exhaust pipe 545, a portion of the gas can be discharged (for example, into the atmosphere) when the pressure inside the material conveying system is too high, so that the pressure inside the system is maintained within a reasonable range. By setting an emptying proportional valve 37 on the first exhaust pipe 545, the emptying proportional valve 37 can be used to control the flow rate of the discharged gas.

[0089] See also Figure 1 and Figure 2The return air branch 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 air intake pipe 511. A ventilation port is provided on the temporary storage bin 43, and the replacement air pipe 543 is connected to the ventilation port.

[0090] It should be noted that by providing a ventilation port on the temporary storage bin 43 and providing a replacement air pipe 543 in the return air pipeline to connect to the ventilation port, 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 starting to operate, thereby reducing the air content in the temporary storage bin 43 or completely exhausting the air in the temporary storage bin 43 to avoid the material 7 stored in the temporary storage bin 43 being oxidized by oxygen in the air.

[0091] See also 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 shielding gas enters the temporary storage bin 43 and the flow rate of the shielding gas entering the temporary storage bin 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 bin 43 is completely exhausted, the displacement gas control valve 39 can be closed.

[0092] See also Figure 1 and Figure 2 For example, a return air control valve 38 is provided on the first branch pipe 542. The return air control valve 38 is used to control whether the protective gas recovered from the first dust collector 21 flows back into the first air inlet pipe 511 and the flow rate of the return gas. For example, the return air control valve 38 can be a manual valve.

[0093] See also Figure 1 and Figure 2 For example, the first air intake pipe 511, the first branch pipe 542 and the second air delivery pipe 512 are connected via a three-way valve.

[0094] See also Figure 1 and Figure 2 The return air main pipe 54 is provided with a heat exchanger 29 and a fan 34, and the heat exchanger 29 and the fan 34 are arranged in sequence at intervals along the direction of gas flow.

[0095] It should be noted that the purpose of providing the heat exchanger 29 is to reduce the temperature of the gas in the return gas main pipe 54 to prevent the gas temperature from being too high, thereby affecting the service life of the fan 34.

[0096] It can be understood that by arranging the fan 34 on the return air main pipe 54, the suction effect of the fan 34 can be utilized to generate negative pressure in the first dust collector 21, thereby promoting the discharge of the protective gas and accelerating the separation of the protective gas and the material 7.

[0097] See also Figure 1 and Figure 2 For example, a second temperature transmitter 23 and a second pressure transmitter 22 are provided on the pipe section of the return air main 54 close to the first air 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 air 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 air outlet 612 of the first dust collector 21.

[0098] See also Figure 1 and Figure 2 For example, a third temperature transmitter 31 and a third pressure transmitter 30 are provided on the pipe section of the return gas main pipe 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 prevent the gas temperature from 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.

[0099] See also Figure 1 and Figure 2 For example, a dew point meter 32 and an oxygen analyzer 33 are provided on the pipe section of the return air main pipe 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 air main pipe 54 to avoid exceeding the moisture content in the system. The oxygen analyzer 33 is used to monitor the oxygen content of the gas in the return air main pipe 54 to avoid exceeding the oxygen content in the system.

[0100] See also Figure 1 and Figure 2 For example, a fourth temperature transmitter 36 and a fourth pressure transmitter 35 are provided on the pipe section of the return air main 54 located after the outlet of the fan 34, for monitoring the temperature of the gas discharged from the outlet of the heat exchanger 29 to prevent the gas temperature from 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.

[0101] See also Figure 1 and Figure 2The material conveying system also includes a buffer bin 15, which is arranged between the first dust collector 21 and the temporary storage bin 43; the inlet of the buffer bin 15 is connected to the first discharge port 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 discharge port 613 of the first dust collector 21, and the upper valve 17 is used to control the first dust collector 21 to feed the buffer bin 15; the outlet of the buffer bin 15 is connected to the second feed port of the temporary storage bin 43, and a lower valve 14 is provided between the outlet of the buffer bin 15 and the second feed port of the temporary storage bin 43, and the lower valve 14 is used to control the buffer bin 15 to feed 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.

[0102] It can be understood that by setting a buffer bin 15 between the first dust collector 21 and the temporary storage bin 43, and setting an upper valve 17 between the buffer bin 15 and the first dust collector 21, and setting a lower valve 14 between the buffer bin 15 and the temporary storage bin 43, when the upper valve 17 is in an open state, the lower valve 14 is in a closed state. At this time, it is the process of the first dust collector 21 feeding the buffer bin 15. Since there is airflow in the first dust collector 21, and part of the airflow may enter the buffer bin 15 during feeding, therefore, by closing the lower valve 14, the airflow in the buffer bin 15 can be prevented from entering the temporary storage bin 43, causing wind blowby. When wind blowby occurs, the discharge uniformity of the temporary storage bin 43 will be affected, thereby causing the feeding uniformity of the pre-carbonization device to be affected. When the upper valve 17 is in the closed state, the lower valve 14 is in the open state. At this time, the buffer bin 15 is feeding the temporary storage bin 43. Since the upper valve 17 is closed, the first dust collector 21 is separated from the buffer bin 15. Therefore, the airflow in the first dust collector 21 cannot enter the buffer bin 15, so there will be no wind blowby phenomenon caused by the airflow rushing into the temporary storage bin 43.

[0103] See also Figure 1 and Figure 2 An acceleration chamber 6 is provided on the first air inlet pipeline 511, and the acceleration chamber 6 has an air inlet, the first feed port and a mixture outlet. The protective gas enters the acceleration chamber 6 through the air inlet, and the material 7 enters the acceleration chamber 6 through the first feed port. 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.

[0104] Exemplarily, the acceleration chamber 6 includes a vertically arranged feed pipe and a horizontally arranged conveying pipe. The feed pipe is a conical tube structure with a gradually expanding diameter from top to bottom. The material 7 can be evenly distributed when falling from the material 7 inlet of the feed pipe. After being evenly mixed with the protective gas entering from the air inlet, it is conveyed to the downstream from the mixture outlet, which has the effect of accelerating the feeding of the material 7 and reducing the pressure loss of the gas.

[0105] See also Figure 1 and Figure 2 The first air intake pipe 511 is further provided with an air intake control valve 5, and the air intake control valve 5 is arranged upstream of the acceleration chamber 6. Exemplarily, the air intake control valve 5 is a manual valve.

[0106] See also 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 arranged on the outside of the temporary storage bin 43 and is used to knock the outer wall of the temporary storage bin 43 to disperse the material 7 in the temporary storage bin 43. The compressed gas pipeline 56 is connected to the air hammer 40 and is used to provide gas power for the air hammer 40.

[0107] It should be noted that when the material 7 is stationary in the temporary storage bin 43, it is prone to forming bridges (material 7 accumulates into an arch shape, hindering material discharge) or agglomerates due to gravity, humidity, or friction between particles. In the embodiment of the present application, 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 destroys the bonding force between the materials 7, causing the bridges to collapse and the agglomerates to loosen, ensuring the smooth fall of the material 7, thereby ensuring smooth material 7 transportation.

[0108] See also Figure 1 and Figure 2 For example, a compressed gas control valve 27 is provided on the compressed gas pipeline 56 to control the opening and closing of the compressed gas or control the flow of the compressed gas. For example, the compressed gas control valve 27 is a manual valve, and the compressed gas is compressed air.

[0109] Exemplarily, the temporary storage bin 43 further has a second discharge port, and the second discharge port is used to discharge the material 7 stored in the temporary storage bin 43.

[0110] See also Figure 1 and Figure 2 For example, the material conveying system also includes a discharge pipe, which is connected to the second discharge port of the temporary storage bin 43. The discharge pipe is provided with an electric discharge valve 41 and a manual discharge valve 42. The electric discharge valve 41 is interlocked with the automation system to realize automatic unloading, and the manual discharge valve 42 is mainly used for manual control during emergency operation or maintenance.

[0111] Illustratively, one end of the discharge pipe away from the temporary storage bin 43 is connected to a pre-carbonization device (not shown) for transporting the material 7 (eg, secondary particles) stored in the temporary storage bin 43 to the pre-carbonization device for pre-carbonization treatment.

[0112] See also Figure 1 and Figure 2 For example, the temporary storage bin 43 is provided with a weighing module 10 to weigh the weight of the material 7 in the temporary storage bin 43 .

[0113] See also Figure 1 and Figure 2 Exemplarily, the material conveying system further includes a second exhaust pipe 551, which is connected to the second air outlet 712 of the second dust collector 12 and is used to discharge the protective gas discharged from the second air outlet 712 into the atmosphere.

[0114] See also 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 an exhaust manifold 552 , which is connected to the atmosphere.

[0115] See also Figure 1 and Figure 2 For example, a soft connection 13 is provided on the pipe section of the second exhaust pipe 551 close to the temporary storage bin 43, a soft connection 13 is provided on the pipe section close to the temporary storage bin 43 in the connecting pipe between the outlet of the buffer bin 15 and the second feed port of the temporary storage bin 43, and a soft connection 13 is provided on the pipe section of the replacement air pipe 543 close to the temporary storage bin 43.

[0116] It should be noted that when the rigid pipe is rigidly connected to the temporary storage bin 43, the rigid connection will destroy the independent force system of the weighing module 10, causing the additional mechanical force of the rigid pipe to participate in the weighing process. For example, the weight of the pipe, thermal expansion and contraction stress, fluid impact pressure, etc. will be directly transmitted to the temporary storage bin 43, thereby causing inaccurate weighing data of the weighing module 10. The embodiment of the present application avoids the problem of inaccurate weighing data of the weighing module 10 caused by the rigid connection between the rigid pipe and the temporary storage bin 43 by providing a flexible connection 13 in the above-mentioned multiple pipes connected to the temporary storage bin 43, thereby ensuring the accuracy of the weighing module 10 in weighing the material 7 in the temporary storage bin 43.

[0117] Illustratively, an outer surface of at least one of the first air intake pipe 511, the second air delivery pipe 512, the first backflush pipe 521, the second backflush pipe 522, the first air delivery pipe 523, the air intake manifold 53, the return air manifold 54, the first manifold 541, the first branch pipe 542, and the displacement air pipe 543 is provided with an insulation layer to maintain the temperature of the material 7 during transportation and prevent heat loss. Illustratively, the insulation layer is made of rock wool, slag wool, aluminum silicate fiber, expanded perlite, or composite silicate.

[0118] Please combine Figures 1 to 4 The present application also provides a material conveying method, which is implemented using the above-mentioned material conveying system. The material conveying method includes:

[0119] The material 7 and the protective gas are mixed in the first air inlet pipe 511, and the material 7 is transported to the first dust collector 21 by the power of the protective gas;

[0120] The first dust collector 21 is used to separate the material 7 and the protective gas, so that the protective gas is discharged from the first gas outlet 612 of the first dust collector 21, and the material 7 is discharged from the first outlet 613 of the first dust collector 21 and enters the temporary storage bin 43 for storage.

[0121] Exemplarily, at least a portion of the protective gas discharged from the first gas outlet 612 of the first dust collector 21 is transported to the first air inlet pipeline 511 to recycle the protective gas.

[0122] For example, when the pressure inside the material conveying system exceeds a predetermined value, a portion of the protective gas discharged from the first gas outlet 612 of the first dust collector 21 is discharged into the external environment.

[0123] Exemplarily, a first filter element 62 is provided in the first dust collector 21, and a plurality of first filter holes are provided on the first filter element 62. The first filter element 62 has a first side and a second side that are relatively arranged. The gas transported from the first air inlet pipe 511 to the first dust collector 21 enters the second side from the first side of the first filter element 62; a first back-flush pipe 521 is used to input protective gas into the first dust collector 21, and the gas transported from the first back-flush pipe 521 to the first dust collector 21 enters the first side from the second side of the first filter element 62 to avoid clogging of the first filter holes on the first filter element 62.

[0124] Illustratively, when the first filter element 62 has a first groove 621 , the first side refers to an outer surface side of the first filter element 62 , and the second side refers to an inner surface side of the first filter element 62 .

[0125] For example, at the initial stage of conveying the material 7 , a portion of the protective gas discharged from the first air outlet 612 of the first dust collector 21 is conveyed to the temporary storage bin 43 to replace the air in the temporary storage bin 43 .

[0126] Exemplarily, a second inlet and outlet is provided at the top of the temporary storage bin 43. The protective gas discharged from the first air outlet 612 of the first dust collector 21 is mixed 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 air 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.

[0127] Exemplarily, a second filter element 72 is provided in the second dust collector 12, and a plurality of second filter holes are provided on the second filter element 72. The second filter element 72 has a third side and a fourth side arranged relatively to each other. The gas transported from the second air inlet pipe to the second dust collector 12 enters the fourth side from the third side of the second filter element 72; a second back-flush pipe 522 is used to input protective gas into the second dust collector 12, and the gas transported from the second back-flush pipe 522 to the second dust collector 12 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.

[0128] Illustratively, when the second filter element 72 has a second groove 721 , the third side refers to an outer surface side of the second filter element 72 , and the fourth side refers to an inner surface side of the second filter element 72 .

[0129] The above describes in detail the material conveying system and material conveying method provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the present application. At the same time, those skilled in the art may vary in the specific implementation methods and scope of application based on the concepts of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A material conveying system, characterized in that: It includes a first air intake pipeline, a first dust collector and a temporary storage bin; The first air inlet pipeline is used to mix the protective gas and the material in the pipeline and use the power of the protective gas to transport the material. The first air inlet pipeline is provided with a first feed port, and the material enters the first air inlet pipeline through the first feed port; The first dust collector includes a first inlet, a first air outlet, and a first discharge port. The first air inlet pipeline is connected to the first inlet, so that a mixture of material and protective gas in the first air inlet pipeline enters the first dust collector through the first inlet. The material and protective gas in the mixture are separated in the first dust collector, and the protective gas is discharged from the first air outlet, and the material is discharged from the first discharge port. The temporary storage bin has a second feed port, the second feed port is connected to the first discharge port of the first dust collector, and the temporary storage bin is used to store materials discharged from the first dust collector; The protective gas includes at least one of nitrogen and an inert gas.

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 being disposed on the periphery of the first filter element and connecting the first filter element and the first cavity, and the first filter element being provided with a plurality of first filter holes; The first connecting member 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 discharge port. The first air outlet is connected to the first space. The first inlet and the first discharge port are connected to the second space. Moreover, the first discharge port is arranged below the first inlet.

3. The material conveying system according to claim 2, characterized in that: The first filter element has a first groove, a plurality of first filter holes are distributed on the groove wall and / or groove bottom of the first groove, the plurality of 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 pipeline, the first cavity of the first dust collector is further provided with a second inlet, the second inlet is connected to the first space, the first backflush pipeline is connected to the second inlet, and 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 to prevent the first filter holes from being blocked by material; and / or, The first dust collector is equipped with a differential pressure gauge, which is used to detect the pressure difference between the first space and the second space.

4. The material conveying system according to claim 1, characterized in that: 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 air outlet, the first inlet and the second air outlet both being in communication with the second inner cavity, and the second air outlet being provided above the first inlet; A second entrance and exit is provided on the top of the temporary storage bin, and the second entrance and exit are connected to the first entrance and exit. When the mixture of material and gas in the temporary storage bin enters the second dust collector through the second entrance and exit and the first entrance and exit, the material and gas are separated, the material falls downward and returns to the temporary storage bin through the first entrance and exit and the second entrance and exit, and the gas is discharged from the second outlet.

5. The material conveying system according to claim 4, characterized in that: The second dust collector further includes a second filter element and a second connecting member located in the second cavity, the second connecting member is arranged on the periphery of the second filter element and connects the second filter element and the second cavity, and the second filter element is provided with a plurality of second filter holes; The second connecting member 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 is connected to the third space, and the second inlet and outlet are connected to the fourth space.

6. The material conveying system according to claim 5, characterized in that: The second filter element has a second groove, a plurality of second filter holes are distributed on the groove wall and / or groove bottom of the second groove, the plurality of 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 pipeline. The second cavity of the second dust collector is also provided with a third inlet, which is connected to the third space. The second backflush pipeline is connected to the third inlet and 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 to prevent the second filter holes from being blocked by materials.

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 return air main pipe, a return air branch pipe and a first exhaust pipe. One end of the return air main pipe is connected to the first air outlet of the first dust collector. The return air branch pipe and the first exhaust pipe are connected in parallel and are both connected to the return air main pipe. The return air branch pipe is connected to the first air inlet pipe, and the first exhaust pipe is provided with an emptying 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 replacement air pipe, the first main pipe and the first exhaust pipe are connected in parallel and are both connected to the return air main pipe, the first branch pipe and the replacement air pipe are connected in parallel and are both connected to the first main pipe, and the first branch pipe is connected to the first intake pipe; The temporary storage bin is provided with a ventilation port, the replacement gas pipe is connected to the ventilation port, and the replacement gas pipe is provided with a replacement gas control valve; and / or, The return air main pipe is provided with a heat exchanger and a fan, and the heat exchanger and the fan are sequentially spaced apart along the direction of gas flow.

9. The material conveying system according to any one of claims 1 to 8, characterized in that: The material conveying system further includes a buffer bin, which is arranged between the first dust collector and the temporary storage bin; The inlet of the buffer bin is connected to the first discharge port of the first dust collector, and an upper valve is provided between the inlet of the buffer bin and the first discharge port of the first dust collector, and the upper valve is used to control the first dust collector to feed the buffer bin; The outlet of the buffer bin is connected to the second feed port of the temporary storage bin, and a lower valve is provided between the outlet of the buffer bin and the second feed port of the temporary storage bin, and the lower valve is used to control the buffer bin to feed 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 a closed state and the other is in an open state; and / or, An acceleration chamber is provided on the first air inlet pipeline, the acceleration chamber having an air inlet, the first feed inlet, and a mixture outlet. Shielding gas enters the acceleration chamber through the air inlet, and materials enter the acceleration chamber through the first feed inlet. The materials and the shielding gas are mixed in the acceleration chamber to form a mixture, which is then 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 arranged on the outside of the temporary storage bin and is used to knock the outer wall of the temporary storage bin to disperse the material in the temporary storage bin. The compressed gas pipeline is connected to the air hammer and is used to provide gas power for the air hammer.

10. A material conveying method, characterized in that: include: The material and the protective gas are mixed in the first air inlet pipeline, and the material is transported to the first dust collector by the power of the protective gas; The first dust collector is used to separate the material and the protective gas, so that the protective gas is discharged from the first gas outlet of the first dust collector, and the material is discharged from the first material outlet of the first dust collector and enters the temporary storage bin for storage.

11. The material conveying method according to claim 10, characterized in that: delivering at least a portion of the protective gas discharged from the first air outlet of the first dust collector to the first air inlet pipeline to recycle the protective gas; and / or, When the pressure inside the material conveying system exceeds a predetermined value, a portion of the protective gas discharged from the first gas outlet of the first dust collector is discharged into the external environment.

12. The material conveying method according to claim 10, characterized in that: The first dust collector is provided with a first filter element, the first filter element is provided with a plurality of first filter holes, the first filter element has a first side and a second side arranged opposite to each other, and the gas transported from the first air inlet line to the first dust collector enters the second side from the first side of the first filter element; A first backflush pipeline is used to input protective gas into the first dust collector, and the gas transported from the first backflush pipeline to the first dust collector enters the first side from the second side of the first filter element to prevent the first filter hole on the first filter element from being blocked.

13. The material conveying method according to claim 10, characterized in that: At the beginning of material transportation, a portion of the protective gas discharged from the first air outlet of the first dust collector is transported to the temporary storage bin to replace the air in the temporary storage bin.

14. The material conveying method according to claim 13, characterized in that: A second inlet and outlet is provided on the top of the temporary storage bin. The protective gas discharged from the first air outlet of the first dust collector is mixed with part of the material in the temporary storage bin to form a fluid. The fluid enters the second dust collector through the second inlet and outlet to separate the material and the protective gas. The protective gas is discharged from the second air outlet of the second dust collector, and the material returns to the temporary storage bin through the first inlet and outlet of the second dust collector and the second inlet and outlet of the temporary storage bin.

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