Pyrolysis recovery device using high-temperature flue gas

Abstract

The application relates to a pyrolysis recycling device utilizing high-temperature flue gas, which comprises a pulverizer, a first pneumatic conveying device, a first feeding pipe, a pyrolysis pipe and a first dust collector. The pulverizer is provided with a feeding port and a discharging port. The first pneumatic conveying device is provided with a first inlet, a first air inlet and a first outlet. The first inlet is communicated with the discharging port. The first air inlet is used for connecting a first carrier gas source. The first outlet of the first pneumatic conveying device is communicated with the first feeding pipe so as to send the material in the discharging port into the first feeding pipe. The inlet of the pyrolysis pipe is communicated with the first feeding pipe. The pyrolysis pipe is arranged in a high-temperature flue. The outlet of the pyrolysis pipe is located outside the high-temperature flue. The first dust collector is provided with a second inlet, a second outlet and an exhaust port. The second inlet is communicated with the outlet of the pyrolysis pipe. The pyrolysis recycling device utilizing high-temperature flue gas does not need to consume energy by additionally arranging a heat source, can save energy consumption, and reduces the operation cost.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology for the treatment of solid waste in new energy sources, and in particular to a pyrolysis recovery device utilizing high-temperature flue gas. Background Technology

[0002] Photovoltaic panels (PV modules) are crucial components of concentrated solar power (CSP) generation, and the development of PV panels and CSP technology has alleviated the global energy crisis to some extent. However, with the large-scale production and use of PV panels, the number of discarded PV panels has also increased dramatically. There are generally four methods for disposing of discarded PV panels: landfill, incineration, direct reuse, and recycling. Landfill and incineration are not recommended due to their adverse environmental impacts. Furthermore, considering the reduction in power output and lifespan, direct reuse is not suitable as a primary disposal method. In contrast, the recycling and reuse of PV panels can promote the sustainable development of the solar energy industry and is particularly beneficial to environmental protection, making it a focus of industry attention.

[0003] However, the difficulty in the separation process of photovoltaic panel recycling lies in the decomposition of EVA (ethylene-vinyl acetate copolymer), which typically involves chemical dissolution, thermal and mechanical pulverization, and a combination of physical and chemical methods. However, these methods generally suffer from high energy consumption, hindering their widespread industrial application. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a pyrolysis recovery device utilizing high-temperature flue gas, characterized by low energy consumption.

[0005] The pyrolysis recovery device utilizing high-temperature flue gas according to an embodiment of the present invention includes:

[0006] A pulverizer having a feed inlet and a discharge outlet;

[0007] The first pneumatic conveying device has a first inlet, a first air inlet and a first outlet. The first inlet is connected to the discharge port, and the first air inlet is used to connect to a first carrier gas source.

[0008] The first feeding pipe is connected to the first outlet of the first pneumatic conveying equipment to deliver the material from the outlet into the first feeding pipe.

[0009] A pyrolysis tube, wherein the inlet of the pyrolysis tube is connected to the first feeding tube, the pyrolysis tube is located inside a high-temperature flue, and the outlet of the pyrolysis tube is located outside the high-temperature flue; and

[0010] The first dust collector has a second inlet, a second outlet, and an exhaust port, wherein the second inlet is connected to the outlet of the pyrolysis tube.

[0011] The pyrolysis recovery device utilizing high-temperature flue gas in this invention utilizes the high-temperature flue gas emitted from existing high-temperature flue pipes in related technologies to pyrolyze the crushed material inside the heat pipe. It does not require an additional heat source to consume energy, thus achieving the purpose of saving energy and reducing operating costs.

[0012] In some possible embodiments, the pyrolysis recovery device utilizing high-temperature flue gas further includes:

[0013] A cyclone separator is provided inside the high-temperature flue. The cyclone separator has a third inlet, a third outlet, and a fourth outlet. The third inlet is connected to the first feeding pipe, and the third outlet is connected to the inlet of the pyrolysis pipe.

[0014] The pyrolysis silo is located within the high-temperature flue, and its inlet is connected to the fourth outlet; and

[0015] The second feeding pipe has its inlet connected to the outlet of the pyrolysis silo, and its outlet connected to the second inlet of the first dust collector.

[0016] In some possible embodiments, the pyrolysis recovery device utilizing high-temperature flue gas further includes:

[0017] A first valve, the inlet of which is connected to the outlet of the pyrolysis tube, and the outlet of which is connected to the second inlet of the first dust collector; and

[0018] The second valve has its inlet connected to the outlet of the second feed pipe, and its outlet connected to the second inlet of the first dust collector.

[0019] In some possible embodiments, the pyrolysis recovery device utilizing high-temperature flue gas further includes a second pneumatic conveying device having a fourth inlet, a second air inlet, and a fifth outlet. The fourth inlet is connected to the outlet of the pyrolysis silo, the second air inlet is used to connect to a second carrier gas source, and the fifth outlet is connected to a second feeding pipe to deliver the material from the outlet of the pyrolysis silo into the second feeding pipe.

[0020] In some possible embodiments, the second pneumatic conveying device includes a first fan and a first ejector, the inlet of the first fan constituting a second air inlet of the second pneumatic conveying device, the first ejector having a fifth inlet, a sixth inlet and a sixth outlet, the fifth inlet constituting the fourth inlet of the second pneumatic conveying device, the sixth inlet communicating with the outlet of the first fan, and the sixth outlet constituting the fifth outlet of the second pneumatic conveying device.

[0021] In some possible embodiments, the pyrolysis recovery device utilizing high-temperature flue gas further includes:

[0022] A gas conveying pipe, the inlet of which is connected to the first outlet of the first pneumatic conveying device, and the outlet of which is connected to each of the inlet of the second feeding pipe and the outlet of the pyrolysis silo.

[0023] A third valve, wherein the third valve is located on the gas transmission pipe; and

[0024] The fourth valve is located on the first feed pipe.

[0025] In some possible embodiments, at least a portion of the pyrolysis tube is located above the cyclone separator in the vertical direction within the high-temperature flue, and the pyrolysis hopper is located below the cyclone separator in the vertical direction.

[0026] In some possible embodiments, the first pneumatic conveying device includes a second fan and a second ejector. The inlet of the second fan constitutes a first air inlet of the first pneumatic conveying device. The second ejector has a seventh inlet, an eighth inlet, and a seventh outlet. The seventh inlet constitutes the first inlet of the first pneumatic conveying device. The eighth inlet is connected to the outlet of the second fan. The seventh outlet constitutes the first outlet of the first pneumatic conveying device.

[0027] In some possible embodiments, the pyrolysis tube is arranged in a spiral shape inside the high-temperature flue.

[0028] In some possible embodiments, the pyrolysis recovery device utilizing high-temperature flue gas further includes a feed hopper located at the feed inlet of the crusher. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a pyrolysis recovery device utilizing high-temperature flue gas according to an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0031] Figure 3 This is a schematic diagram of a pyrolysis recovery device utilizing high-temperature flue gas, according to another embodiment of the present invention.

[0032] Figure 4 yes Figure 2 A magnified view of a portion of the image.

[0033] Figure label:

[0034] 100 pyrolysis recovery unit;

[0035] Crusher 1, First pneumatic conveying device 2, First inlet 21, First outlet 22, Second fan 23, Second ejector 24, Seventh inlet 241, Eighth inlet 242, Seventh outlet 243, First feeding pipe 3, Pyrolysis pipe 4, First dust collector 5, Second inlet 51, Second outlet 52, Cyclone separator 6, Third inlet 61, Third outlet 62, Fourth outlet 63, Pyrolysis silo 7, Second feeding pipe 8, First valve 91, Second valve 92, Third valve 93, Fourth valve 94, Second pneumatic conveying device 10, Fourth inlet 101, Fifth outlet 102, First fan 103, First ejector 104, Fifth inlet 1041, Sixth inlet 1042, Sixth outlet 1043, Air conveying pipe 11, Feed silo 12;

[0036] High-temperature flue 20. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] like Figures 1 to 2 As shown, the pyrolysis recovery device 100 utilizing high-temperature flue gas according to an embodiment of the present invention includes a crusher 1, a first pneumatic conveying device 2, a first feeding pipe 3, a pyrolysis pipe 4, and a first dust collector 5.

[0039] The crusher 1 has a feed inlet and a discharge outlet. The first pneumatic conveying device 2 has a first inlet 21, a first air inlet, and a first outlet 22. The first inlet 21 is connected to the discharge outlet, and the first air inlet is used to connect to a first carrier gas source. The first outlet 22 of the first pneumatic conveying device 2 is connected to a first feeding pipe 3 to deliver the material from the discharge outlet into the first feeding pipe 3. The inlet of the pyrolysis pipe 4 is connected to the first feeding pipe 3. The pyrolysis pipe 4 is located inside the high-temperature flue 20, and the outlet of the pyrolysis pipe 4 is located outside the high-temperature flue 20. The first dust collector 5 has a second inlet 51, a second outlet 52, and an exhaust port. The second inlet 51 is connected to the outlet of the pyrolysis pipe 4.

[0040] In this embodiment of the invention, the pyrolysis recovery device 100 utilizing high-temperature flue gas is used such that, during operation, material enters the crusher 1 through its feed inlet. The crusher 1 breaks down the material, reducing larger volumes into smaller particles. The granular material is discharged from the crusher 1's outlet and, under the action of the first pneumatic conveying device 2, is fed into the first feeding pipe 3. Under the continuous action of the first pneumatic conveying device 2, the granular material enters the pyrolysis pipe 4. Since the pyrolysis pipe 4 is located within the high-temperature flue 20, the high-temperature flue gas in the high-temperature flue 20 exchanges heat with the pyrolysis pipe 4, heating the granular material and the first carrier gas flow within the pyrolysis pipe 4, thereby causing pyrolysis of the granular material within the pyrolysis pipe 4. Under the action of the first pneumatic conveying device 2, the pyrolyzed material and the gas generated by pyrolysis are carried out of the pyrolysis pipe 4 along with the first carrier gas flow and enter the first dust collector 5 through the second inlet 51. The first dust collector 5 performs solid-gas separation on the pyrolysis material. The first dust collector 5 captures solid particles in the pyrolysis material and discharges the solid particles from the second outlet 52. The gaseous state in the pyrolysis material is discharged from the exhaust port.

[0041] The high-temperature flue 20 utilized in the pyrolysis recovery device 100 of this embodiment can be the flue gas duct of a pulverized coal boiler, a flue gas duct of a circulating fluidized bed, a flue gas duct of a cement kiln, a flue gas duct of a waste incineration plant, or a flue gas duct of other devices or systems that require the emission of high-temperature flue gas. The pyrolysis recovery device 100 of this embodiment utilizes the high-temperature flue gas emitted from the existing high-temperature flue duct 20 in related technologies to pyrolyze the crushed material within the heat pipe 4. This eliminates the need for an additional heat source, thus saving energy and reducing operating costs.

[0042] Therefore, the pyrolysis recovery device 100 of this embodiment has the characteristic of low energy consumption.

[0043] To make the scheme of this application easier to understand, Figures 1-2 Let's take an example to explain in detail.

[0044] The pyrolysis recovery device 100 utilizing high-temperature flue gas in this embodiment of the invention includes a crusher 1, a feeding hopper 12, a first pneumatic conveying device 2, a first feeding pipe 3, a pyrolysis pipe 4, a first dust collector 5, a cyclone separator 6, a pyrolysis hopper 7, a second feeding pipe 8, a first valve 91, and a second valve 92.

[0045] The high-temperature flue 20 is the high-temperature flue of the pulverized coal boiler. In this embodiment, the temperature inside the high-temperature flue 20 is higher than 600°C.

[0046] The crusher 1 has a feed inlet and a discharge outlet. The crusher 1 can crush waste photovoltaic panels into granular materials.

[0047] The feed hopper 12 is located at the feed inlet of the crusher 1. The feed hopper 12 has a certain space to hold a certain number of waste photovoltaic panels. During the operation of the crusher 1, it can provide continuous material for the crusher 1 to continuously crush, avoid interruption of material supply or long intervals in the crushing process, so as to ensure the continuity of the first pneumatic conveying device 2 in conveying the crushed material and ensure the normal operation of subsequent processes.

[0048] The first pneumatic conveying device 2 has a first inlet 21, a first air inlet, and a first outlet 22. The first inlet 21 is connected to the discharge port of the crusher 1, and the first air inlet is used to connect to a first carrier air source. The first pneumatic conveying device 2 provides power for the movement of the crushed material.

[0049] In some embodiments, the first pneumatic conveying device 2 includes a second fan 23 and a second ejector 24. The inlet of the second fan 23 is connected to a first carrier gas source. The second ejector 24 has a seventh inlet 241, an eighth inlet 242, and a seventh outlet 243. The seventh inlet 241 constitutes the first inlet 21 of the first pneumatic conveying device 2, that is, the seventh inlet 241 of the second ejector 24 is connected to the discharge port of the crusher 1. The eighth inlet 242 is connected to the outlet of the second fan 23. The seventh outlet 243 constitutes the first outlet 22 of the first pneumatic conveying device 2, that is, the seventh outlet 243 is connected to the first feeding pipe 3. The crushed material enters the second ejector 24 through the seventh inlet 241 (i.e., the first inlet 21), and the second fan 23 forms a high-speed airflow that discharges the crushed material through the seventh outlet 243 (i.e., the first outlet 22).

[0050] Specifically, the second ejector 24 is a Venturi ejector.

[0051] In some embodiments, the first carrier gas source is the flue gas discharged from the high-temperature flue 20.

[0052] Specifically, a second dust collector is connected to the outlet of the high-temperature flue 20, and the exhaust port of the second dust collector is connected to the inlet of the second fan 12. The second dust collector removes dust and other particulate matter from the flue gas discharged from the high-temperature flue 20. The dust and other particulate matter are discharged from the ash discharge port of the second dust collector, and the dust-removed flue gas is discharged from the exhaust port of the second dust collector and, as the first carrier gas, enters the pyrolysis recovery device 100 through the inlet of the second fan 12 for reuse.

[0053] This pyrolysis recovery device 100 uses the dust-removed flue gas discharged from the high-temperature flue 20 as the first carrier gas. It is not only easy to obtain and low in cost, but also has a low oxygen content, so it will not react with the crushed material under high temperature conditions, thus ensuring the efficiency of pyrolysis of the crushed material.

[0054] The inlet of the first feeding pipe 3 is connected to the first outlet 22 of the first pneumatic conveying device 2, that is, the inlet of the first feeding pipe 3 is connected to the seventh outlet 243 of the second ejector 24. The crushed material discharged from the seventh outlet 243 (i.e. the first outlet 22) of the first ejector 24 enters the first feeding pipe 3.

[0055] Cyclone separator 6 is located inside high-temperature flue 20. Cyclone separator 6 has a third inlet 61, a third outlet 62, and a fourth outlet 63. The third inlet 61 is connected to the first feed pipe 3, the third outlet 62 is connected to the inlet of the pyrolysis pipe 4, and the fourth outlet 63 is connected to the inlet of the pyrolysis silo 7, which is located inside high-temperature flue 20. The material in the first feed pipe 3 enters the cyclone separator 6 through the third inlet 61. The cyclone separator 6 separates the pulverized material according to the particle size. Small-diameter particles are discharged into the heat pipe 4 with the first carrier gas flow, while large-diameter particles are discharged into the pyrolysis silo 7.

[0056] Cyclone separator 6 separates the pulverized material into two parts based on particle size. Smaller particles, which can move with the first carrier gas flow, are heated in pyrolysis tube 4, causing EVA to pyrolyze. Larger particles are heated in pyrolysis hopper 7, causing EVA to pyrolyze. The pyrolysis gas generated by EVA pyrolysis flows with the first carrier gas flow into heat pipe tube 4 and is discharged through the exhaust port of the first dust collector 5. Pyrolysis hopper 7 has a certain storage space, allowing larger particles to gradually accumulate and pyrolyze, thus enabling better pyrolysis of particles of different sizes and achieving the purpose of staged pyrolysis.

[0057] Small-diameter particles entering the pyrolysis tube 4 are pyrolyzed inside the pyrolysis tube 4. After pyrolysis, the small-diameter particles are carried by the pyrolysis gas into the first dust collector 5 through the second inlet 51. The first dust collector 5 captures the particles and discharges them from the second outlet 52. The pyrolysis gas and the first carrier gas are discharged from the exhaust port.

[0058] In some embodiments, the pyrolysis tube 4 is spirally arranged inside the high-temperature flue 20, thereby increasing the length of the pyrolysis tube 4 inside the high-temperature flue 20, increasing the movement path of small-diameter particulate materials, increasing the pyrolysis time of small-diameter particulate materials inside the high-temperature flue 20, and thus enabling the material to be fully pyrolyzed inside the pyrolysis tube 4.

[0059] In some other embodiments, the pyrolysis tube 4 is arranged in a continuous "S" shape within the high-temperature flue 20. The pyrolysis tube 4 can also be other shapes, as long as they can increase the pyrolysis time of small-diameter particulate materials within the high-temperature flue 20.

[0060] The pyrolysis silo 7 has a certain storage space. Large-diameter particles separated from the cyclone separator 6 are temporarily stored in the pyrolysis silo 7. Furthermore, the pyrolysis silo 7 exchanges heat with the high-temperature flue gas in the high-temperature flue duct 20, thereby heating and pyrolyzing the material temporarily stored in the pyrolysis silo 7.

[0061] The inlet of the second feeding pipe 8 is connected to the outlet of the pyrolysis silo 7, and the outlet of the second feeding pipe 8 is connected to the second inlet 51 of the first dust collector 5. The large-diameter particles after pyrolysis in the pyrolysis silo 7 can be discharged to the first dust collector 5 through the second feeding pipe 8. The first dust collector 5 performs solid-gas separation on the large-diameter particles after pyrolysis, and discharges the captured large-diameter particles through the second outlet 52, while the gas is discharged through the exhaust port.

[0062] In some embodiments, the exhaust port of the first dust collector 5 is connected to the air inlet of the furnace to discharge the high-temperature pyrolysis gas and carrier gas into the furnace, making full use of the heat of the pyrolysis gas to heat the furnace. Furthermore, the pyrolysis gas is also treated by the tail gas treatment section of the furnace, which can also effectively avoid the pollution of the environment by the pyrolysis gas.

[0063] In some embodiments, at least a portion of the pyrolysis tube 4 within the high-temperature flue 20 is positioned above the cyclone separator 6 in the vertical direction, while the pyrolysis hopper 7 is positioned below the cyclone separator 6 in the vertical direction. This arrangement facilitates the upward movement of small-diameter particles into the pyrolysis tube 4 under the influence of the carrier gas, and the downward fall of large-diameter particles into the pyrolysis hopper 7 under their own gravity. The vertical arrangement of the pyrolysis tube 4 and the pyrolysis hopper 7 relative to the cyclone separator 6 fully utilizes the inherent characteristics of the two materials, reduces the power required to move the materials, and better separates the two materials.

[0064] The inlet of the first valve 91 is connected to the outlet of the pyrolysis pipe 4, and the outlet of the first valve 91 is connected to the second inlet 51 of the first dust collector 5. The first valve 91 is designed to facilitate the connection and disconnection of the pyrolysis recovery device 100 to the heat pipe 4 and the first dust collector 5.

[0065] The inlet of the second valve 92 is connected to the outlet of the second feed pipe 8, and the outlet of the second valve 92 is connected to the second inlet 51 of the first dust collector 5. The second valve 92 is designed to facilitate the connection and disconnection of the pyrolysis silo 7 and the first dust collector 5 by the pyrolysis recovery device 100, and can adjust and control the pyrolysis time and accumulation (enrichment) time of large-diameter particles in the pyrolysis silo 7, thus ensuring the pyrolysis effect of EVA in the large-diameter particles.

[0066] When the second valve 92 is closed, the first valve 91 is open, and the material in the pyrolysis tube 4 can be discharged to the first dust collector 5. The first dust collector 5 captures the small-diameter particles after pyrolysis for recycling. When the large-diameter particles in the pyrolysis silo 7 are enriched to a set level or for a set time (in this embodiment, the enrichment time is set to 20-40 minutes), the first valve 91, the crusher 1, the first pneumatic conveying device 2, and the cyclone separator 6 are closed, and the second valve 92 is opened. The large-diameter particles in the pyrolysis silo 7 flow to the first dust collector 5, which captures them for recycling.

[0067] The pyrolysis recovery device 100 of this embodiment of the invention enables the first dust collector 5 to process the small-diameter particulate matter and the large-diameter particulate matter after pyrolysis separately by setting the first valve 91 and the second valve 92, so as to recover the two types of materials with different physical properties separately, thereby facilitating subsequent processing.

[0068] It should be noted that the enrichment time (pyrolysis time) of large-diameter particles in pyrolysis bin 7 is related to the temperature of the high-temperature flue gas in high-temperature flue duct 20. When the temperature of the high-temperature flue gas in high-temperature flue duct 20 is low, the enrichment time (pyrolysis time) of large-diameter particles in pyrolysis bin 7 needs to be appropriately extended in order to ensure the pyrolysis effect of large-diameter particles. For example, if the temperature of the high-temperature flue gas in high-temperature flue duct 20 is 450-600℃, the enrichment time (pyrolysis time) of large-diameter particles in pyrolysis bin 7 is 40-60 minutes.

[0069] In some embodiments, see Figure 1 As shown, the pyrolysis recovery device 100 of this embodiment further includes a second pneumatic conveying device 10. The second pneumatic conveying device 10 has a fourth inlet 101, a second air inlet, and a fifth outlet 102. The fourth inlet 101 is connected to the outlet of the pyrolysis silo 7, the second air inlet is used to connect to a second carrier gas source, and the fifth outlet 102 is connected to a second feeding pipe 8 to deliver the material from the outlet of the pyrolysis silo 7 into the second feeding pipe 8. The second pneumatic conveying device 10 can form a high-speed airflow to deliver the material discharged from the outlet of the pyrolysis silo 7 to the first dust collector 5 through the second feeding pipe 8. The first dust collector 5 performs solid-gas separation on the large-diameter particles after pyrolysis, and discharges the captured large-diameter particles through the second outlet 52. The pyrolysis gas and the second carrier gas flow are discharged through the exhaust port.

[0070] The second pneumatic conveying device 10 can increase the speed at which large-diameter particles move from the pyrolysis silo 7 to the first dust collector 5, thereby increasing the material transfer efficiency between the pyrolysis silo 7 and the first dust collector 5, and thus improving the recovery efficiency of large-diameter particles after pyrolysis.

[0071] In some embodiments, the second pneumatic conveying device 10 includes a first blower 103 and a first ejector 104. The inlet of the first blower 103 constitutes the second air inlet of the second pneumatic conveying device 10. The first ejector 104 has a fifth inlet 1041, a sixth inlet 1042 and a sixth outlet 1043. The fifth inlet 1041 constitutes the fourth inlet 101 of the second pneumatic conveying device 10, that is, the fifth inlet 1041 is connected to the outlet of the pyrolysis silo 7. The sixth inlet is connected to the outlet of the first blower 103. The sixth outlet 1043 constitutes the fifth outlet 102 of the second pneumatic conveying device 10, that is, the sixth outlet 1043 is connected to the second feeding pipe 8. The large-diameter pyrolysis particles discharged from the pyrolysis silo 7 enter the first ejector 104 through the fifth inlet 1041 (fourth inlet 101). The first fan 103 forms a high-speed flow of the second carrier gas, which discharges the material from the sixth outlet 1043 (i.e. the fifth outlet 102) into the second feed pipe 8 and then into the first dust collector 5.

[0072] In some embodiments, the second carrier gas source is the flue gas discharged from the high-temperature flue 20. Specifically, the exhaust port of the second dust collector is also connected to the inlet of the first fan 103. That is to say, the second carrier gas source is the same as the first carrier gas source, which is the dust-removed flue gas discharged from the high-temperature flue 20.

[0073] In some other embodiments, see [reference] Figures 3 to 4 As shown, the pyrolysis recovery device 100 further includes a gas supply pipe 11, a third valve 93, and a fourth valve 94. The inlet of the gas supply pipe 11 is connected to the first outlet 22 of the first pneumatic conveying device 2, and the outlet of the gas supply pipe 11 is connected to each of the inlet of the second feeding pipe 8 and the outlet of the pyrolysis silo 7. The third valve 93 is located on the gas supply pipe 11, and the fourth valve 94 is located on the first feeding pipe 3.

[0074] With the fourth valve 94 open, the third valve 93 and the second valve 92 are closed. The first outlet 22 of the first pneumatic conveying device 2 is connected to the first feeding pipe 3, and the first pneumatic conveying device 2 delivers the crushed material into the first feeding pipe 3. With the third valve 93 open, the second valve 92 is open, the fourth valve 94 is closed, the first valve 91 is closed, and the crusher 1 is shut down. The first outlet 22 of the first pneumatic conveying device 2 is connected to the air conveying pipe 11. Under the action of the second fan 23 of the first pneumatic conveying device 2, a high-speed first carrier airflow is formed. This first carrier airflow flows through the air conveying pipe 11 to the second feeding pipe 8, while simultaneously moving the material at the outlet of the pyrolysis silo 7 and delivering the material to the first dust collector 5.

[0075] The gas conveying pipe 11 directs the airflow from the first pneumatic conveying device 2 to the outlet of the pyrolysis silo 7, thereby increasing the speed at which large-diameter particles move from the outlet of the pyrolysis silo 7 to the first dust collector 5, improving the material transfer efficiency between the pyrolysis silo 7 and the first dust collector 5, and thus improving the recovery efficiency of large-diameter particles after pyrolysis. It is also low in cost and construction cost.

[0076] Specifically, see Figure 3 As shown, the connection between the outlet of the gas transmission pipe 11, the outlet of the pyrolysis silo 7, and the second feeding pipe 8 is in the shape of a "┷". That is, the extension directions of the end of the gas transmission pipe 11 connected to the outlet of the pyrolysis silo 7 and the end of the second feeding pipe 8 connected to the outlet of the pyrolysis silo 7 are on the same straight line, so that when the first carrier gas flow in the gas transmission pipe 11 enters the second feeding pipe 8, it carries the large-diameter particles at the outlet of the pyrolysis silo 7 into the second feeding pipe 8, ensuring the conveying of the large-diameter particles by the first carrier gas flow.

[0077] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0078] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] In this invention, unless otherwise explicitly 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," "over," and "on top" of 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.

[0081] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. 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.

[0082] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pyrolysis recovery device utilizing high-temperature flue gas, characterized in that, include: A pulverizer (1) having a feed inlet and a discharge outlet; The first pneumatic conveying device (2) has a first inlet (21), a first air inlet and a first outlet (22). The first inlet (21) is connected to the outlet and the first air inlet is used to connect to the first carrier gas source. The first feeding pipe (3) is connected to the first outlet (22) of the first pneumatic conveying device (2) to deliver the material from the outlet into the first feeding pipe (3); The pyrolysis tube (4) has its inlet connected to the first feeding tube (3), and is located inside the high-temperature flue (20). The outlet of the pyrolysis tube (4) is located outside the high-temperature flue (20). and The first dust collector (5) has a second inlet (51), a second outlet (52) and an exhaust port, and the second inlet (51) is connected to the outlet of the pyrolysis tube (4); The first pneumatic conveying device (2) includes a second fan (23) and a second ejector (24). The inlet of the second fan (23) constitutes the first air inlet of the first pneumatic conveying device (2). The second ejector (24) has a seventh inlet (241), an eighth inlet (242) and a seventh outlet (243). The seventh inlet (241) constitutes the first inlet (21) of the first pneumatic conveying device (2). The eighth inlet (242) is connected to the outlet of the second fan (23). The seventh outlet (243) constitutes the first outlet (22) of the first pneumatic conveying device (2).

2. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 1, characterized in that, Further includes: Cyclone separator (6), the cyclone separator (6) is located in the high temperature flue (20), the cyclone separator (6) has a third inlet (61), a third outlet (62) and a fourth outlet (63), the third inlet (61) is connected to the first feeding pipe (3), and the third outlet (62) is connected to the inlet of the pyrolysis pipe (4); The pyrolysis silo (7) is located inside the high-temperature flue (20), and the inlet of the pyrolysis silo (7) is connected to the fourth outlet (63). and The inlet of the second feeding pipe (8) is connected to the outlet of the pyrolysis silo (7), and the outlet of the second feeding pipe (8) is connected to the second inlet (51) of the first dust collector (5).

3. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 2, characterized in that, Further includes: The first valve (91) has its inlet connected to the outlet of the pyrolysis tube (4), and its outlet is connected to the second inlet (51) of the first dust collector (5). and The second valve (92) has its inlet connected to the outlet of the second feed pipe (8) and its outlet connected to the second inlet (51) of the first dust collector (5).

4. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 2, characterized in that, The device further includes a second pneumatic conveying device (10), which has a fourth inlet (101), a second air inlet and a fifth outlet (102). The fourth inlet (101) is connected to the outlet of the pyrolysis silo (7), the second air inlet is used to connect to a second carrier gas source, and the fifth outlet (102) is connected to the second feeding pipe (8) to deliver the material from the outlet of the pyrolysis silo (7) into the second feeding pipe (8).

5. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 4, characterized in that, The second pneumatic conveying device (10) includes a first fan (103) and a first ejector (104). The inlet of the first fan (103) constitutes the second air inlet of the second pneumatic conveying device (10). The first ejector (104) has a fifth inlet (1041), a sixth inlet (1042) and a sixth outlet (1043). The fifth inlet (1041) constitutes the fourth inlet (101) of the second pneumatic conveying device (10). The sixth inlet (1042) is connected to the outlet of the first fan (103). The sixth outlet (1043) constitutes the fifth outlet (102) of the second pneumatic conveying device (10).

6. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 2, characterized in that, Further includes: Gas delivery pipe (11), the inlet of which is connected to the first outlet (22) of the first pneumatic conveying device (2), and the outlet of which is connected to the inlet of the second feeding pipe (8) and the outlet of the pyrolysis silo (7). The third valve (93) is located on the gas transmission pipe (11); and The fourth valve (94) is located on the first feed pipe (3).

7. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 2, characterized in that, The portion of the pyrolysis tube (4) located inside the high-temperature flue (20) is positioned above the cyclone separator (6) in the vertical direction, while the pyrolysis hopper (7) is positioned below the cyclone separator (6) in the vertical direction.

8. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 1, characterized in that, The pyrolysis tube (4) is spirally arranged inside the high-temperature flue (20).

9. The pyrolysis recovery device utilizing high-temperature flue gas according to claim 1, characterized in that, It further includes a feed bin (12) which is located at the feed inlet of the crusher (1).

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