Spray pyrolysis system

Abstract

The utility model belongs to the technical field of battery material preparation, and particularly discloses a spray pyrolysis system which comprises a gas hot blast stove, spray drying equipment, a pyrolysis furnace, a cyclone separator, a bag-type dust collector and an induced draft fan, a drying cavity is formed in the spray drying equipment, the gas hot-blast stove is communicated with the drying cavity through a first conveying pipe, a second conveying pipe is arranged at the bottom of the spray drying equipment, an inlet of the pyrolyzing furnace is communicated with the second conveying pipe, and an outlet of the pyrolyzing furnace is connected with an inlet of the cyclone separator through a third conveying pipe; the cyclone separator is provided with a first gas outlet and a first powder outlet. Materials are dried in the spray drying equipment, then fed into the pyrolyzing furnace and then conveyed to the cyclone separator, so that the positive electrode materials can be collected from the first powder outlet in the bottom of the cyclone separator, the purpose of producing the positive electrode materials at a time is achieved, and intermediate reaction materials do not need to be carried many times; dust and smoke generated in the transportation process are prevented from being discharged to the surrounding environment, and the cleanness of the workshop environment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery material preparation, in particular to a spray pyrolysis system. Background Art

[0002] Existing positive electrode materials can only be synthesized through traditional processing techniques, such as synthesizing precursors, washing, drying, mixing, crushing, mixing, calcining and other steps. The process cost is relatively complicated, the process is cumbersome, the cost is high, the process cycle is long, and the control is difficult. In addition, during the reaction of the positive electrode material, the intermediate reaction materials need to be transported many times. Not only is the process cumbersome and labor-intensive, but the dust generated during transportation will also be discharged into the surrounding environment, polluting the workshop environment. Utility Model Content

[0003] The purpose of the utility model is to provide a spray pyrolysis system to solve the technical problems in the prior art that the cathode material process is complicated, intermediate reaction materials need to be transported during production, and dust is easily generated to pollute the workshop environment.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a spray pyrolysis system, which includes: a gas hot blast furnace, a spray drying device, a pyrolysis furnace, a cyclone separator, a bag dust collector, an induced draft fan, a third conveying pipe, and a fourth conveying pipe; the gas hot blast furnace includes a first conveying pipe and a furnace body, the furnace body has a first natural gas inlet and a hot air outlet, the first natural gas inlet is used to be connected to a natural gas pipeline, and the hot air outlet is connected to the first conveying pipe; the spray drying device includes a drying tower, an atomizer, a material inlet pipe and a second conveying pipe; the drying tower has a drying chamber inside, the atomizer is arranged at the top of the drying chamber, the material inlet pipe is connected to the first conveying pipe, and the material inlet pipe is connected to the first conveying pipe. The atomizer is connected; the hot air outlet is connected to the drying chamber through the first conveying pipe, the second conveying pipe is arranged at the bottom of the drying tower and connected to the drying chamber, the inlet of the pyrolysis furnace is connected to the second conveying pipe, and the outlet of the pyrolysis furnace is connected to the inlet of the cyclone separator through the third conveying pipe; the cyclone separator has a first gas outlet and a first powder outlet; the first gas outlet is connected to the dust removal chamber of the bag-type dust collector through the fourth conveying pipe; the first powder outlet is arranged at the bottom of the cyclone separator; the induced draft fan is connected to the upper side of the bag-type dust collector, and the induced draft fan is used to provide negative pressure for the bag-type dust collector.

[0005] Preferably, the pyrolysis furnace comprises a heating tube, which is arranged in the pyrolysis furnace, and the inlet of the heating tube is connected to the second conveying tube; the outlet of the heating tube is connected to the third conveying tube.

[0006] Preferably, the inlet of the heating tube is arranged at the lower side of the pyrolysis furnace, and the outlet of the heating tube is arranged at the upper side of the pyrolysis furnace.

[0007] Preferably, the heating tube is S-shaped.

[0008] Preferably, the pyrolysis furnace further has an electric heating pipe, and the electric heating pipe is arranged in the pyrolysis furnace.

[0009] Preferably, the electric heating tube is wound around the outside of the heating tube.

[0010] Preferably, the inlet of the pyrolysis furnace is detachably connected to the second conveying pipe; and the outlet of the pyrolysis furnace is detachably connected to the third conveying pipe.

[0011] Preferably, the bag-type dust collector comprises a dust filter bag, a compressed gas inlet, an air hammer, and a pulse valve; the bag-type dust collector has a dust removal chamber, the dust filter bag is arranged in the dust removal chamber, the dust filter bag divides the dust removal chamber into a filtered chamber and an unfiltered chamber, the unfiltered chamber is connected to a fourth conveying pipe, the air hammer is arranged in the filtered chamber, and the air hammer is connected to the compressed gas inlet, the pulse valve is arranged on the air hammer, and the filtered chamber is connected to the induced draft fan.

[0012] Preferably, the gas hot blast stove further comprises a blower, and the outlet of the blower is connected to the air inlet of the gas hot blast stove.

[0013] Preferably, a second powder outlet is provided at the bottom of the bag filter.

[0014] The spray pyrolysis system provided by the utility model has the following beneficial effects: the spray pyrolysis system utilizes spray drying equipment to dry materials, and the dried materials will directly enter the pyrolysis furnace through the second conveying pipe for pyrolysis reaction to generate positive electrode material dust, and the positive electrode material is conveyed to the cyclone separator through the airflow, and the cyclone separator separates the positive electrode material dust from the gas, so that the positive electrode material can be collected from the first powder outlet at the bottom of the cyclone separator, so as to achieve the purpose of producing positive electrode materials at one time, that is, in the process of producing positive electrode materials, there is no need to transport intermediate reaction materials multiple times, thus reducing the transportation process, preventing dust and smoke generated during transportation from being discharged into the surrounding environment, ensuring the cleanliness of the workshop environment, and utilizing a bag dust collector to remove dust from exhaust gas, thereby further reducing the emission of exhaust gas dust.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of a spray pyrolysis system according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the heating tube in the pyrolysis furnace of the embodiment of the utility model;

[0018] Figure 3 It is a schematic structural diagram of a heating tube in a pyrolysis furnace of an embodiment of the utility model when it is S-shaped;

[0019] Figure 4 It is a structural schematic diagram of a bag dust collector according to an embodiment of the utility model.

[0020] In the figure, 100, gas hot air furnace; 110, first natural gas inlet; 120, first conveying pipe; 130, blower; 140, furnace body; 150, hot air outlet; 200, spray drying equipment; 210, material inlet pipe; 220, second conveying pipe; 230, drying tower; 300, pyrolysis furnace; 310, heating pipe; 320, electric heating pipe; 400, cyclone separator; 410, first gas outlet; 420, first powder outlet; 430, first rotary valve; 500, bag filter; 510, second powder outlet; 520, second rotary valve; 530, compressed gas inlet; 540, dust filter bag; 550, filtered chamber; 560, unfiltered chamber; 570, air hammer; 600, induced draft fan; 610, tail gas discharge port; 700, third conveying pipe; 800, fourth conveying pipe. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Please also read Figures 1 to 4 , the spray pyrolysis system provided in the embodiment of the utility model is now described.

[0026] like Figure 1 As shown, the spray pyrolysis system of the embodiment of the utility model includes: a gas hot air furnace 100, a spray drying device 200, a pyrolysis furnace 300, a cyclone separator 400, a bag dust collector 500, an induced draft fan 600, a third delivery pipe 700, and a fourth delivery pipe 800; the gas hot air furnace 100 includes a first delivery pipe 120 and a furnace body 140, and the furnace body 140 has a first natural gas inlet and a hot air outlet 150, the first natural gas inlet 110 is used to connect to a natural gas pipeline, the first natural gas inlet 110 provides natural gas for the gas hot air furnace 100, and the hot air outlet 150 is connected to the first delivery pipe 120. The spray drying equipment 200 includes a drying tower 230, an atomizer, a material inlet pipe 210 and a second conveying pipe 220. The drying tower 230 has a drying chamber inside. The atomizer is arranged at the top of the drying chamber, and the material inlet pipe 210 is connected to the atomizer. The hot air outlet 150 is connected to the drying chamber through the first conveying pipe 120. The second conveying pipe 220 is arranged at the bottom of the drying tower 230 and is connected to the drying chamber. The gas hot air furnace 100 can generate hot air through combustion to convey the hot air to the drying chamber of the spray drying equipment 200 to increase the temperature of the drying chamber to dry the material. The material enters from the material inlet pipe 210, is sprayed into the drying chamber through the atomizer, and is dried with the hot air conveyed by the gas hot air furnace 100. It should be noted that the spray drying equipment 200 can use the hot air conveyed by the gas hot air furnace 100 to increase the temperature in the drying chamber so as to dry the atomized material. The dried material will be conveyed to the second conveying pipe 220 at the bottom of the drying tower 230. In addition, in some other embodiments, the spray drying equipment 200 can also heat the drying chamber by electric heating.

[0027] Reference Figure 1 The inlet of the pyrolysis furnace 300 is connected to the second conveying pipe 220, and the outlet of the pyrolysis furnace 300 is connected to the inlet of the cyclone separator 400 through the third conveying pipe 700; the cyclone separator 400 has a first gas outlet 410 and a first powder outlet 420; the first gas outlet 410 is connected to the dust removal chamber of the bag-type dust collector 500 through the fourth conveying pipe 800; the first powder outlet 420 is arranged at the bottom of the cyclone separator 400; the induced draft fan 600 is connected to the upper side of the bag-type dust collector 500, and the induced draft fan 600 is used to provide negative pressure for the bag-type dust collector 500.

[0028] Reference Figure 1 The induced draft fan 600 provides negative pressure for the bag filter 500, and further provides negative pressure for the cyclone separator 400 and the pyrolysis furnace 300. The material atomized and dried by the spray drying equipment 200 is sent to the pyrolysis furnace 300 through the second conveying pipe 220 for pyrolysis. The oxide positive electrode material generated after pyrolysis in the pyrolysis furnace 300 will enter the cyclone separator 400; the cyclone separator 400 separates the oxide positive electrode material from the excess exhaust gas, so that the oxide positive electrode material can be gathered at the bottom of the cyclone separator 400, and the oxide positive electrode material can be collected through the first powder outlet 420.

[0029] Reference Figure 1 and Figure 4 The bag dust collector 500 is connected to the first gas outlet 410 of the cyclone separator 400 through the fourth conveying pipe 800; that is, the airflow out of the cyclone separator 400 will enter the bag dust collector 500 for dust removal to reduce the dust in the exhaust gas discharged to the outside, so that the exhaust gas meets the emission standards and avoids the dust discharged from the exhaust gas from polluting the workshop environment.

[0030] Reference Figure 1 and Figure 4 The gas outlet of the bag filter 500 is connected to the induced draft fan 600, that is, the induced draft fan 600 is used to extract the tail gas of the bag filter 500 and the entire spray pyrolysis system. The induced draft fan 600 has a tail gas discharge port 610 to discharge the tail gas to the outside.

[0031] The spray pyrolysis system of this embodiment uses a spray drying device 200 to dry the material. The dried material will directly enter the pyrolysis furnace 300 through the second conveying pipe 220 for pyrolysis reaction to generate positive electrode material dust. The positive electrode material is conveyed to the cyclone separator 400 through the airflow. The cyclone separator 400 separates the positive electrode material dust from the gas, so that the positive electrode material can be collected from the first powder outlet 420 at the bottom of the cyclone separator 400, thereby achieving the purpose of one-time production of positive electrode materials, that is, in the process of producing positive electrode materials, there is no need to transport intermediate reaction materials multiple times, which reduces the transportation process, prevents dust and smoke generated during transportation from being discharged into the surrounding environment, ensures the cleanliness of the workshop environment, and uses a bag dust collector 500 to remove dust from the exhaust gas, further reducing the emission of exhaust dust.

[0032] Specifically, in some embodiments of the present invention, the first powder outlet 420 is provided with a first rotary valve 430. The first rotary valve 430 is used to open or close the first powder outlet 420; the first rotary valve 430 is generally in a normally closed state, and when the first rotary valve 430 opens the first powder outlet 420, the oxide positive electrode material can be transported from the first powder outlet 420 to the outside, so that the factory can collect and utilize the oxide positive electrode material.

[0033] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the pyrolysis furnace 300 includes a heating tube 310, which is disposed in the pyrolysis furnace 300, and the inlet of the heating tube 310 is connected to the second conveying tube 220; the outlet of the heating tube 310 is connected to the third conveying tube 700. That is, the pyrolysis furnace 300 has an independent pipeline to carry the dried material, and the material will be pyrolyzed at high temperature when passing through the heating tube 310 to generate the required positive electrode material.

[0034] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the inlet of the heating tube 310 is arranged at the lower side of the pyrolysis furnace 300, and the outlet of the heating tube 310 is arranged at the upper side of the pyrolysis furnace 300. That is, the heating tube 310 is not directly horizontally arranged in the pyrolysis furnace 300, so the length of the heating tube 310 can be extended, and the time that the material stays in the heating tube 310 can be increased, so that the material can be fully pyrolyzed at high temperature.

[0035] Reference Figure 2 and Figure 3 Optimally, the heating tube 310 is S-shaped to extend the total length of the heating tube 310, increase the calcination time of the material in the heating tube 310, extend the reaction path of the material, and the material dust can be uniformly calcined in a short time and fully reacted to obtain a consistent positive electrode material.

[0036] Reference Figure 2 and Figure 3 It should be noted that there are multiple heating tubes 310, and the multiple heating tubes 310 are all connected to the second conveying pipe 220, so that the material can be calcined and pyrolyzed through the multiple heating tubes 310, and the reaction is more complete.

[0037] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the pyrolysis furnace 300 further includes an electric heating tube 320, which is disposed in the pyrolysis furnace 300. That is, the heating method of the pyrolysis furnace 300 is electric heating, and the electric heating tube 320 is used to heat the heating tube 310, so that the material flowing through the heating tube 310 is pyrolyzed at high temperature.

[0038] Reference Figure 2 and Figure 3 In order to heat more fully and evenly and effectively utilize electric energy, the electric heating tube 320 is wound around the outside of the heating tube 310. When the electric heating tube 320 is connected to a power source, the electric heating tube 320 wound around the outside of the heating tube 310 can better heat the heating tube 310, making the temperature of each position of the heating tube 310 more uniform, so as to control the reaction temperature of the material.

[0039] Reference Figure 1 In some embodiments of the present invention, the inlet of the pyrolysis furnace 300 is detachably connected to the second delivery pipe 220; the outlet of the pyrolysis furnace 300 is detachably connected to the third delivery pipe 700. That is, the pyrolysis furnace 300 can be connected and installed with the second conveying pipe 220 and the third conveying pipe 700 according to the actual production needs; when the material needs to be spray-pyrolyzed, the pyrolysis furnace 300 is connected and installed with the second conveying pipe 220 and the third conveying pipe 700, so that the dried material can be pyrolyzed at high temperature through the pyrolysis furnace 300 to produce positive electrode materials; when only the material needs to be spray-dried, the pyrolysis furnace 300 is disassembled from the connection between the second conveying pipe 220 and the third conveying pipe 700, and the second conveying pipe 220 and the third conveying pipe 700 are connected by other pipes, so that the material dried in the drying tower 230 directly enters the cyclone separator 400, and only a simple spray drying process is performed. The spray pyrolysis system of this embodiment can not only perform a spray pyrolysis process, but also a spray drying process, which is a dual purpose, saving workshop space and cost.

[0040] Reference Figure 4In some embodiments of the present invention, the bag filter 500 includes a dust filter bag 540, a compressed gas inlet 530, an air hammer 570, and a pulse valve. The bag filter 500 has a dust removal chamber, the dust filter bag 540 is arranged in the dust removal chamber, the dust filter bag 540 divides the dust removal chamber into a filtered chamber 550 and an unfiltered chamber 560, the filtered chamber 550 is located above the unfiltered chamber 560, the air hammer 570 is arranged in the filtered chamber 550, and the air hammer 570 faces downward to perform a backwash operation on the dust filter bag 540; the air hammer 570 is connected to the compressed gas inlet 530, so that the air hammer 570 can blow out compressed gas. The pulse valve is arranged on the air hammer 570 to control the air hammer 570 to spray compressed gas according to the set pulse to impact the dust filter bag 540. The filtered chamber 550 is connected to the induced draft fan 600 so that the induced draft fan 600 provides negative pressure for the bag filter 500 to facilitate filtering and dust removal. The dust filter bag 540 is used to filter out dust from the airflow out of the cyclone separator 400, and the filtered dust will stay on the dust filter bag 540. Therefore, it is necessary to clean and recoil the dust filter bag 540 regularly. The pulse valve is used to control whether the compressed gas starts the air hammer 570, so that the air hammer can spray compressed gas to repeatedly impact the dust filter bag 540 back and forth, so as to reduce the dust on the dust filter bag 540 and make the dust fall to the bottom of the bag filter 500. It should be noted that the compressed gas inlet 530 can be passed with compressed air and compressed inert gas to prevent the introduced gas from reacting with dust or exhaust gas.

[0041] In some embodiments of the present invention, the gas hot blast stove 100 further includes a blower 130, and the outlet of the blower 130 is connected to the air inlet of the gas hot blast stove 100. The blower 130 is used to send external air into the furnace body of the gas hot blast stove 100, and provide sufficient oxygen for the gas hot blast stove 100, and can also send hot air into the first conveying pipe 120, so as to facilitate sending the hot air into the drying chamber of the drying tower 230.

[0042] In some embodiments of the present invention, referring to Figure 1 and Figure 4 The dust in the bag filter 500 cannot be discharged at will, and can be further utilized after being recovered. In some embodiments of the utility model, the bottom of the bag filter 500 is provided with a second powder outlet 510, so that the dust can be recovered through the bottom of the bag filter 500, and the second powder outlet 510 is provided with a second rotary valve 520. The second rotary valve 520 is used to open or close the second powder outlet 510; the second rotary valve 520 is generally in a normally closed state. When the air hammer 570 in the bag filter 500 is required to impact the dust filter bag 540, the second rotary valve 520 is opened so that the filtered dust can be recovered from the second powder outlet 510, which is conducive to resource recycling.

[0043] The overall working process of the spray pyrolysis system of this embodiment is as follows: the gas hot blast furnace 100 is started, and hot blast is sent into the drying tower 230, and the liquid material is sent to the atomizer through the material inlet pipe 210, and the atomizer sprays the atomized material into the drying chamber of the drying tower 230, and the material is dried in the drying chamber, and the dried material enters the heating pipe 310 of the pyrolysis furnace 300 through the second conveying pipe 220 for high-temperature pyrolysis to generate positive electrode materials; then the positive electrode materials are conveyed to the cyclone separator 400 through the airflow, and the cyclone separator 400 separates the positive electrode material dust from the gas, and the positive electrode materials can be collected from the first powder outlet 420 at the bottom of the cyclone separator 400; then the exhaust gas of the cyclone separator 400 enters the bag filter 500 for dust removal to reduce the dust in the exhaust gas, and finally the exhaust gas is discharged through the exhaust gas discharge port of the induced draft fan.

[0044] In summary, the spray pyrolysis system of this embodiment uses a spray drying device 200 to dry the material. The dried material will directly enter the pyrolysis furnace 300 through the second conveying pipe 220 for a pyrolysis reaction to generate positive electrode material dust. The positive electrode material is conveyed to the cyclone separator 400 through the airflow. The cyclone separator 400 separates the positive electrode material dust from the gas, so that the positive electrode material can be collected from the first powder outlet 420 at the bottom of the cyclone separator 400, thereby achieving the purpose of producing positive electrode materials at one time, that is, in the process of producing positive electrode materials, there is no need to transport the intermediate reaction materials multiple times, which reduces the transportation process, prevents the dust and smoke generated during transportation from being discharged into the surrounding environment, ensures the cleanliness of the workshop environment, and uses a bag dust collector 500 to remove dust from the exhaust gas, further reducing the emission of exhaust dust.

[0045] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A spray pyrolysis system, characterized in that: include: A gas hot blast furnace (100), a spray drying device (200), a pyrolysis furnace (300), a cyclone separator (400), a bag dust collector (500), an induced draft fan (600), a third conveying pipe (700), and a fourth conveying pipe (800); the gas hot blast furnace (100) comprises a first conveying pipe (120) and a furnace body (140); the furnace body (140) has a first natural gas inlet (110) and a hot air outlet (150); the first natural gas inlet (110) is used to be connected to a natural gas pipeline; the hot air outlet (150) is connected to the first conveying pipe (120); the spray drying device (200) comprises a drying tower (230), an atomizer, a material inlet pipe (210), and a second conveying pipe (220); the drying tower (230) has a drying chamber inside, the atomizer is arranged at the top of the drying chamber, and the material inlet pipe (210) is connected to the atomizer; The hot air outlet (150) is connected to the drying chamber through the first conveying pipe (120); the second conveying pipe (220) is arranged at the bottom of the drying tower (230) and is connected to the drying chamber; the inlet of the pyrolysis furnace (300) is connected to the second conveying pipe (220); the outlet of the pyrolysis furnace (300) is connected to the inlet of the cyclone separator (400) through the third conveying pipe (700); the cyclone separator (400) has a first gas outlet (410) and a first powder outlet (420); the first gas outlet (410) is connected to the bag-type dust collector (500) through the fourth conveying pipe (800); the first powder outlet (420) is arranged at the bottom of the cyclone separator (400); the induced draft fan (600) is connected to the upper side of the bag-type dust collector (500), and the induced draft fan (600) is used to provide negative pressure for the bag-type dust collector (500).

2. The spray pyrolysis system according to claim 1, characterized in that: The pyrolysis furnace (300) comprises a heating pipe (310), wherein the heating pipe (310) is arranged in the pyrolysis furnace (300), and an inlet of the heating pipe (310) is connected to the second conveying pipe (220); and an outlet of the heating pipe (310) is connected to the third conveying pipe (700).

3. The spray pyrolysis system according to claim 2, characterized in that: The inlet of the heating pipe (310) is arranged at the lower side of the pyrolysis furnace (300), and the outlet of the heating pipe (310) is arranged at the upper side of the pyrolysis furnace (300).

4. The spray pyrolysis system according to claim 3, characterized in that: The heating tube (310) is S-shaped.

5. The spray pyrolysis system according to claim 3, characterized in that: The pyrolysis furnace (300) further comprises an electric heating pipe (320), wherein the electric heating pipe (320) is arranged in the pyrolysis furnace (300).

6. The spray pyrolysis system according to claim 5, characterized in that: The electric heating tube (320) is wound around the outside of the heating tube (310).

7. The spray pyrolysis system according to claim 1, characterized in that: The inlet of the pyrolysis furnace (300) is detachably connected to the second conveying pipe (220); and the outlet of the pyrolysis furnace (300) is detachably connected to the third conveying pipe (700).

8. The spray pyrolysis system according to claim 1, characterized in that: The bag filter (500) comprises a dust filter bag (540), a compressed gas inlet (530), an air hammer (570), and a pulse valve; the bag filter (500) has a dust removal chamber, the dust filter bag (540) is arranged in the dust removal chamber, the dust filter bag (540) divides the dust removal chamber into a filtered chamber (550) and an unfiltered chamber (560), the unfiltered chamber (560) is communicated with a fourth conveying pipe (800), the air hammer (570) is arranged in the filtered chamber (550), and the air hammer (570) is communicated with the compressed gas inlet (530), the pulse valve is arranged on the air hammer (570), and the filtered chamber (550) is communicated with the induced draft fan (600).

9. The spray pyrolysis system according to claim 1, characterized in that: The gas hot blast stove (100) further comprises a blower (130), wherein an outlet of the blower (130) is connected to an air inlet of the gas hot blast stove (100).

10. The spray pyrolysis system according to claim 1, characterized in that: The bottom of the bag filter (500) is provided with a second powder outlet (510).

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