Decommissioned fan blade pyrolysis system

Abstract

The invention discloses a decommissioned fan blade pyrolysis system which comprises a wind power generation mechanism and a heat source supply mechanism. The heat source supply mechanism comprises a collecting lens, a cavity type heat absorber and a fused salt conveying assembly. The collecting lens is arranged on the bracket; the cavity type heat absorber is erected at the focus position of the collecting lens and used for collecting sunlight collected by the collecting lens and converting the collected solar energy into heat energy. The fused salt conveying assembly is connected between the cavity type heat absorber and the pyrolyzing furnace; the system can be operated on site near an original wind power plant, the transportation cost is reduced, renewable clean energy such as wind energy and solar energy is used for crushing, pyrolyzing and recycling retired fan blades, energy consumption is reduced, real-time monitoring and temperature control of the pyrolyzing process are achieved, the pyrolyzing heat efficiency is improved, pollutant emission is reduced, and environmental pollution is reduced. Therefore, high-efficiency, low-energy-consumption and low-pollution-emission operation of pyrolysis treatment of the retired fan blade is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of treatment of retired wind turbine blades, and specifically to a pyrolysis system for retired wind turbine blades. Background Art

[0002] At present, the main method for treating retired wind turbine blades is pyrolysis treatment. Usually, a crushing device is first used to crush the retired wind turbine blades, and then the crushed retired wind turbine blades are transported into a pyrolysis furnace, where they are heated at a high temperature in an anaerobic or anoxic environment to decompose, generating pyrolysis gas, pyrolysis oil, residual fibers, metals, coke and other solids. The composition of the pyrolysis gas produced depends on conditions such as the nature of the raw material and the pyrolysis temperature.

[0003] In the current pyrolysis system, both the crushing process and the heating process of the pyrolysis furnace require energy drive to achieve. For example, an electric drive crusher is used in the crushing process to crush the wind turbine blades, resulting in high power consumption. The heating of the pyrolysis furnace is driven by fire or electricity, and a large amount of energy is consumed during the pyrolysis process. Therefore, the traditional pyrolysis system has the defect of high energy consumption and is not conducive to sustainable development. Summary of the Invention

[0004] The purpose of the present invention is to provide a pyrolysis system for retired wind turbine blades to solve the problem of high energy consumption in the current pyrolysis recovery process of retired wind turbine blades.

[0005] The technical solution of the present invention is as follows: A pyrolysis system for retired wind turbine blades includes a wind power drive mechanism and a heat source supply mechanism. The wind power drive mechanism is used to connect to the crushing shaft in the crusher to provide power to the crushing shaft. The heat source supply mechanism is used to provide a heat source to the pyrolysis furnace for pyrolysis. The heat source supply mechanism includes a condenser, a cavity type heat absorber and a molten salt conveying assembly. The condenser is arranged on a bracket. The cavity type heat absorber is erected at the focal position of the condenser. The cavity type heat absorber is used to collect the sunlight concentrated by the condenser and convert the concentrated solar energy into heat energy. The molten salt conveying assembly is connected between the cavity type heat absorber and the pyrolysis furnace and is used to convey molten salt into the pyrolysis furnace. The conveyed molten salt enters the pyrolysis furnace after being heated by the cavity type heat absorber and serves as the heat source of the pyrolysis furnace to pyrolyze the retired wind turbine blades crushed by the crusher.

[0006] Preferably, as a further improvement of the present invention, an angle adjustment mechanism, a controller and a sun tracking sensor are provided between the condenser and the bracket. The angle adjustment mechanism and the sun tracking sensor are respectively electrically connected to the controller. The sun tracking sensor is used to measure the direction signal of the incident solar radiation and transmit it to the controller. The controller controls the angle adjustment mechanism to drive the condenser to rotate, realizing the tracking of the pitch angle and azimuth angle of the condenser to the sun.

[0007] Preferably, as a further improvement of the present invention, the angle adjustment mechanism includes a first angle adjustment component and a second angle adjustment component; the first angle adjustment component is used to adjust the pitch angle of the condenser, and the first angle adjustment component includes: a first shaft, horizontally arranged, the back side of the condenser is fixed to the first shaft through a connecting rod; a U-shaped mounting bracket, with its opening facing upward, the first shaft is arranged between the two side walls of the opening of the U-shaped mounting bracket and is rotatably connected to the U-shaped mounting bracket; a first motor, fixed inside the U-shaped mounting bracket, and the output shaft of the first motor is connected to the first shaft through a first gear transmission component; the second angle adjustment component is used to adjust the azimuth angle of the condenser, and the second angle adjustment component includes: a second shaft, vertically arranged, the lower end of the second shaft is rotatably connected to the bracket, the upper end of the second shaft is fixedly connected to the bottom of the U-shaped mounting bracket, a second motor, fixed on the bracket, and the output shaft of the second motor is connected to the second shaft through a second gear transmission component.

[0008] Preferably, as a further improvement of the present invention, the molten salt delivery component includes a molten salt pump, an input pipeline and an output pipeline; the input pipeline is connected to the cavity-type solar receiver and the molten salt pump, and the molten salt pump drives the flow of molten salt; one end of the output pipeline is connected to the cavity-type solar receiver, and the other end of the output pipeline is connected to the pyrolysis furnace.

[0009] Preferably, as a further improvement of the present invention, it further includes a nitrogen heating and delivery component, and the nitrogen heating and delivery component includes a nitrogen gas storage cylinder, a nitrogen gas pipeline, a gas flow meter, a regulating valve and a nitrogen gas preheater; the nitrogen gas storage cylinder is connected to the nitrogen gas preheater through the nitrogen gas pipeline, and the nitrogen gas pipeline is provided with a gas flow meter and a regulating valve for collecting and controlling the nitrogen gas delivery flow rate. The nitrogen gas preheater is a shell-and-tube heat exchanger, which uses the waste heat of the high-temperature flue gas discharged from the pyrolysis furnace to heat the passing nitrogen gas, playing a role in recovering waste heat. The nitrogen gas heated by the nitrogen gas preheater is delivered to the pyrolysis furnace to create an inert environment.

[0010] Preferably, as a further improvement of the present invention, the wind power driving mechanism includes a support main body, a power input shaft, an impeller, a power output shaft and a transmission component; an installation cavity is provided inside the support main body; the power input shaft is horizontally rotatably connected in the installation cavity, and one end of the power input shaft extends to the outside of the support main body; the impeller is fixedly connected to one end of the power input shaft; the power output shaft is horizontally rotatably connected in the installation cavity, and one end of the power output shaft extends to the outside of the support main body and is connected to the crushing shaft in the crusher; the transmission component includes a first bevel gear set, a transmission shaft and a second bevel gear set, the transmission shaft is vertically arranged, the first bevel gear set is connected between the power input shaft and the transmission shaft, and the second bevel gear set is connected between the transmission shaft and the power output shaft.

[0011] Preferably, as a further improvement of the present invention, it further includes a pneumatic separator, which is used for crushing, separating and screening the retired wind turbine blades after primary crushing into secondary fragments, achieving high-precision separation of light and heavy materials, improving the processing efficiency and resource recovery utilization rate, and reducing pollutant emissions and energy consumption.

[0012] Preferably, as a further improvement of the present invention, it further includes a magnetic separator, which is used for automatically separating and recycling the magnetic materials in the secondary fragments, reducing impurities in the secondary fragments, improving economic benefits, reducing energy consumption, and feeding the retired wind turbine blades after magnetic separation into the pyrolysis recovery component for pyrolysis.

[0013] Compared with the prior art, the beneficial effects of the present invention are: It can operate locally near the original wind farm, reducing transportation costs, and using renewable clean energies such as wind energy and solar energy for crushing, pyrolysis and recycling of retired wind turbine blades, reducing energy consumption and pollutant emissions, so as to ensure the efficient, low-energy-consuming and low-pollution-emission operation of the pyrolysis treatment of retired wind turbine blades. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of a pyrolysis system for retired wind turbine blades of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the wind crushing component in a pyrolysis system for retired wind turbine blades of the present invention.

[0016] Figure 3 It is a schematic diagram of the structure of the heat accumulation component in a pyrolysis system for retired wind turbine blades of the present invention.

[0017] Figure 4 It is a schematic diagram of the structure of the angle adjustment mechanism in a pyrolysis system for retired wind turbine blades of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure of the molten salt conveying component in a pyrolysis system for retired wind turbine blades of the present invention. Detailed Embodiments

[0019] The following combines Figures 1 to 5 , and describes the detailed embodiments of the present invention in detail. In the description of the invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the invention, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0021] Embodiment As Figures 1 to 3 shown, an embodiment of the present invention provides a pyrolysis system for retired wind turbine blades, including a wind power driving mechanism 1 and a heat source supply mechanism 3. The wind power driving mechanism 1 is used to connect with the crushing shaft in the crusher 2 to provide power to the crushing shaft; the heat source supply mechanism 3 is used to provide a heat source to the pyrolysis furnace 4 for pyrolysis. The heat source supply mechanism 3 includes a condenser 31, a cavity type heat absorber 33 and a molten salt conveying assembly 34; the condenser 31 is arranged on the bracket 32, and the condenser 31 is in a butterfly shape; the cavity type heat absorber 33 is erected at the focal position of the condenser 31. The cavity type heat absorber 33 is used to collect the sunlight concentrated by the condenser 31 and convert the concentrated solar energy into heat energy; the molten salt conveying assembly 34 is connected between the cavity type heat absorber 33 and the pyrolysis furnace 4 and is used to convey molten salt into the pyrolysis furnace 4. The conveyed molten salt enters the pyrolysis furnace 4 after being heated by the cavity type heat absorber 33 and serves as the heat source of the pyrolysis furnace 4 to pyrolyze the retired wind turbine blades crushed by the crusher 2.

[0022] In this embodiment, by providing the wind power driving mechanism 1 as the driving source of the crusher 2, the wind energy is used to drive the crusher 2 to crush the retired wind turbine blades, saving power consumption. By providing the heat source supply mechanism 3, the condenser 31 is used to concentrate solar energy, and the cavity type heat absorber 33 is used to collect the sunlight concentrated by the condenser 31 and convert the concentrated solar energy into heat energy. The molten salt conveying assembly 34 conveys the molten salt heated by the cavity type heat absorber 33 into the pyrolysis furnace 4 and serves as the heat source of the pyrolysis furnace 4 to pyrolyze the retired wind turbine blades crushed by the crusher 2. The solar energy is used to replace the thermal or electric power to drive the pyrolysis furnace 4 for pyrolysis recovery, greatly reducing the energy consumption and realizing the efficient, low-energy consumption and low-emission operation of the retired wind turbine blades.

[0023] In another embodiment of the present invention, in order to improve the utilization efficiency of solar energy, an angle adjusting mechanism 5, a controller and a solar tracking sensor are provided between the condenser 31 and the bracket 32. The angle adjusting mechanism 5 and the solar tracking sensor are respectively electrically connected to the controller. The solar tracking sensor is used to measure the direction signal of the incident solar radiation and transmit it to the controller. The controller controls the angle adjusting mechanism 4 to drive the condenser 31 to rotate, realizing the tracking of the condenser 31 for the pitch angle and azimuth angle of the sun, ensuring that the sunlight is accurately concentrated on the cavity type heat absorber 33, improving the tracking accuracy and the solar energy capture rate.

[0024] Specifically, as Figure 3 shown, the angle adjustment mechanism 5 includes a first angle adjustment component 51 and a second angle adjustment component 52; the first angle adjustment component 51 is used to adjust the pitch angle of the condenser lens 31, and the first angle adjustment component 51 includes a first shaft 511, a U-shaped mounting bracket 513, and a first motor 514: the first shaft 511 is horizontally arranged, and the back side of the condenser lens 31 is fixed to the first shaft 511 through a connecting rod 512; the opening of the U-shaped mounting bracket 513 faces upward, the first shaft 511 is arranged between the two side walls of the opening of the U-shaped mounting bracket 513 and is rotatably connected to the U-shaped mounting bracket 513; the first motor 514 is fixed inside the U-shaped mounting bracket 513, and the output shaft of the first motor 514 is connected to the first shaft 511 through a first gear transmission component 515; the second angle adjustment component 52 is used to adjust the azimuth angle of the condenser lens 31, and the second angle adjustment component 52 includes a second shaft 521 and a second motor 522; the second shaft 521 is vertically arranged, the lower end of the second shaft 521 is rotatably connected to the bracket 32, the upper end of the second shaft 521 is fixedly connected to the bottom of the U-shaped mounting bracket 513, the second motor 522 is fixed on the bracket 32, and the output shaft of the second motor 522 is connected to the second shaft 521 through a second gear transmission component 523.

[0025] In this embodiment, by the cooperation of the first angle adjustment component 51 and the second angle adjustment component 52, it is possible to adjust the solar pitch angle and azimuth angle of the condenser lens 31 so that it tracks the movement of the sun; When adjusting the pitch angle of the condenser lens 31 to follow the sun, by controlling the first motor 514, the first shaft 511 is driven to tilt and rotate through the first gear transmission component 515. During the rotation of the first shaft 511, the condenser lens 31 is driven to rotate synchronously with the first shaft 511 through the connecting rod 512; When adjusting the azimuth angle of the condenser lens 31 to follow the sun, by controlling the second motor 522, the second shaft 521 is driven to rotate in a circle on the horizontal plane through the second gear transmission component 523. During the rotation of the second shaft 521, the U-shaped mounting bracket 513, the first motor 514, the first gear transmission component 515, and the first shaft 511 as a whole are driven to rotate synchronously, and the condenser lens 31 is driven to rotate synchronously through the connecting rod 512.

[0026] Specifically, as Figure 5As shown, the molten salt conveying assembly 34 includes a molten salt pump 341, an input pipeline 342, and an output pipeline 343. The input pipeline 342 is connected to the cavity type solar receiver 33 and the molten salt pump 341, and the molten salt pump 341 drives the molten salt to flow. One end of the output pipeline 343 is connected to the cavity type solar receiver 33, and the other end of the output pipeline 343 is connected to the pyrolysis furnace 4. Molten salt is selected as the working medium inside the pipeline. The molten salt pump 341 is used to drive the molten salt to flow and achieve heating. The low-temperature molten salt flows into the cavity type solar receiver 33 through the input pipeline 342, and the molten salt is heated. The heated molten salt is transported to the pyrolysis furnace 4 through the output pipeline 343 as a heat source for pyrolysis recovery.

[0027] In another embodiment of the present invention, it further includes a nitrogen heating and conveying assembly 6. The nitrogen heating and conveying assembly includes a nitrogen gas storage cylinder 61, a nitrogen gas conveying pipeline 62, and a nitrogen gas preheater 65. The nitrogen gas storage cylinder 61 is connected to the nitrogen gas preheater 65 through the nitrogen gas conveying pipeline 62. A gas flow meter 63 and a regulating valve 64 are provided on the nitrogen gas conveying pipeline 62 for collecting and controlling the nitrogen gas conveying flow rate. The nitrogen gas preheater 65 is a shell and tube heat exchanger, and the shell and tube heat exchanger is connected to the pyrolysis furnace 4. The waste heat of the high-temperature flue gas discharged from the pyrolysis furnace 4 is used to heat the passing nitrogen gas, playing a role in recovering waste heat. The nitrogen gas heated by the nitrogen gas preheater 65 is transported to the pyrolysis furnace 4 to create an inert environment.

[0028] Specifically, as Figure 4 shown, the wind power driving mechanism 1 includes a support main body 11, a power input shaft 12, an impeller 13, a power output shaft 14, and a transmission assembly. An installation cavity is provided inside the support main body 11. The power input shaft 12 is horizontally rotatably connected in the installation cavity, and one end of the power input shaft 12 extends to the outside of the support main body 11. The impeller 13 is fixedly connected to one end of the power input shaft 12. The power output shaft 14 is horizontally rotatably connected in the installation cavity, and one end of the power output shaft 14 extends to the outside of the support main body 11 and is connected to the crushing shaft in the crusher 2. The transmission assembly includes a first bevel gear set 15, a transmission shaft 16, and a second bevel gear set 17. The transmission shaft 16 is vertically arranged. The first bevel gear set 15 is connected between the power input shaft 12 and the transmission shaft 16, and the second bevel gear set 17 is connected between the transmission shaft 16 and the power output shaft 14.

[0029] In this embodiment, when driving the crushing shaft of the crusher 2 to rotate through the wind power driving mechanism 1 to crush the retired wind turbine blades, the wind energy is used to drive the impeller 13 to rotate. The impeller 13 drives the power input shaft 12 to rotate. During the rotation of the power input shaft 12, the power is transmitted to the power output shaft 14 through the transmission assembly, and the power output shaft 14 is used to drive the crushing shaft of the crusher 2 to rotate to crush the retired fan.

[0030] In another embodiment of the present invention, it further includes an air classifier 7, which is used to crush, separate and screen the retired fan blades after the first-stage crushing by the crusher 2 to form secondary fragments, achieving high-precision separation of light and heavy materials, improving the processing efficiency and resource recovery utilization rate, and reducing pollutant emissions and energy consumption.

[0031] In another embodiment of the present invention, it further includes a magnetic separator 8, which is used to automatically separate and recover the magnetic materials in the secondary fragments crushed by the air classifier 7, reduce the impurities in the secondary fragments, improve economic benefits, reduce energy consumption, and send the retired fan blades after magnetic separation into the pyrolysis recovery component for pyrolysis.

[0032] In another embodiment of the present invention, a thermocouple and a single-chip microcomputer are also provided on the pyrolysis furnace 4. The thermocouple and the single-chip microcomputer are used to collect and control the temperature in the pyrolysis furnace in real time, realize the control of pyrolysis temperature, pyrolysis time and heating rate, optimize the pyrolysis process, reduce the thermal damage to the fiber surface, and improve the performance of the recycled fiber; The discharge port of the pyrolysis furnace 4 is also connected with a rectification tower 91, a denitration device 92, an electrostatic precipitator 93, a desulfurization tower 94, a gas storage tank 95 and an oil storage tank 96; the pyrolysis furnace 4 is used to heat the high-temperature molten salt, and then pyrolyze the fan blade fragments. The thermocouple and the single-chip microcomputer are used to collect and control the temperature in the pyrolysis furnace in real time, realize the control of pyrolysis temperature, pyrolysis time and heating rate, optimize the pyrolysis process, reduce the thermal damage to the fiber surface, and improve the performance of the recycled fiber; the rectification tower 91 is used to separate the pyrolyzate into pyrolysis gas and pyrolysis oil; the denitration device 92 adopts the selective non-catalytic reduction method to remove nitrogen oxides in the flue gas; the flue gas discharged from the denitration device 92 enters the nitrogen preheater 65 for waste heat recovery to heat the nitrogen; the electrostatic precipitator 93 is used to remove dust from the flue gas discharged from the nitrogen preheater 65; the desulfurization tower 94 is used to remove SO2 from the flue gas discharged from the electrostatic precipitator 93; the gas storage tank 95 is used to store most of the pyrolysis gas discharged from the rectification tower 91, and the rest of the pyrolysis gas is sent back to the pyrolysis furnace 4 for combustion-assisted heating; the oil storage tank 96 is used to store the pyrolysis oil.

[0033] In summary, the present invention can use wind energy to preliminarily crush retired wind turbine blades. After secondary crushing and screening by a pneumatic separator and a magnetic separator, they are sent into a pyrolysis furnace. The nitrogen in the nitrogen gas storage cylinder is controlled in flow rate by a gas flow meter and a regulating valve, preheated in a nitrogen preheater and then sent into the pyrolysis furnace. The heat collection system realizes the preliminary heating of molten salt by concentrating solar energy, and then reheats it in the pyrolysis furnace to pyrolyze the secondary fragments of the wind turbine blades. The generated pyrolysis gas and pyrolysis oil are condensed and separated by a rectification tower. Part of the pyrolysis gas is sent back to the pyrolysis furnace for auxiliary heating, the rest of the pyrolysis gas is stored in a gas storage tank, and the pyrolysis oil is stored in an oil storage tank. The flue gas discharged from the pyrolysis furnace is discharged after purification and waste heat recovery. This technical solution uses renewable clean energy, is energy-saving and environmentally friendly, has high pyrolysis efficiency, emits few pollutants, can control the pyrolysis process in real time and accurately, and realizes the efficient, low-energy-consumption and low-emission operation of retired wind turbine blades.

[0034] The above-disclosed are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pyrolysis system for retired wind turbine blades, characterized in that, Comprising: A wind power driving mechanism (1) for connecting with a crushing shaft in a crusher (2) to provide power to the crushing shaft; A heat source supply mechanism (3) for supplying a heat source to a pyrolysis furnace (4) for pyrolysis. The heat source supply mechanism (3) includes: A condenser lens (31) arranged on a bracket (32); A cavity type heat absorber (33) erected at the focal position of the condenser lens (31). The cavity type heat absorber (33) is used to collect the sunlight concentrated by the condenser lens (31) and convert the concentrated solar energy into heat energy; A molten salt conveying assembly (34) connected between the cavity type heat absorber (33) and the pyrolysis furnace (4) for conveying molten salt into the pyrolysis furnace (4). The conveyed molten salt enters the pyrolysis furnace (4) after being heated by the cavity type heat absorber (33) as a heat source of the pyrolysis furnace (4) to pyrolyze the decommissioned wind turbine blades crushed by the crusher (2).

2. The pyrolysis system for retired wind turbine blades according to claim 1, characterized in that, An angle adjusting mechanism (5), a controller, and a sun tracking sensor are provided between the condenser lens (31) and the bracket (32). The angle adjusting mechanism (5) and the sun tracking sensor are respectively electrically connected to the controller. The sun tracking sensor is used to measure the direction signal of the incident solar radiation and transmit it to the controller, and the controller controls the angle adjusting mechanism (4) to drive the condenser lens (31) to rotate, realizing the tracking of the pitch angle and azimuth angle of the condenser lens (31) to the sun.

3. The pyrolysis system for retired wind turbine blades according to claim 2, wherein The angle adjusting mechanism (5) includes: A first angle adjusting component (51) for adjusting the pitch angle of the condenser lens (31). The first angle adjusting component (51) includes: a first shaft (511) arranged horizontally, the back side of the condenser lens (31) is fixed to the first shaft (511) through a connecting rod (512); a U-shaped mounting frame (513) with an upward opening. The first shaft (511) passes through the opening side walls of the U-shaped mounting frame (513) and is rotatably connected to the U-shaped mounting frame (513); a first motor (514) fixed inside the U-shaped mounting frame (513), and the output shaft of the first motor (514) is connected to the first shaft (511) through a first gear transmission component (515); A second angle adjusting component (52) for adjusting the azimuth angle of the condenser lens (31). The second angle adjusting component (52) includes: a second shaft (521) arranged vertically, the lower end of the second shaft (521) is rotatably connected to the bracket (32), the upper end of the second shaft (521) is fixedly connected to the bottom of the U-shaped mounting frame (513), a second motor (522) fixed on the bracket (32), and the output shaft of the second motor (522) is connected to the second shaft (521) through a second gear transmission component (523).

4. The pyrolysis system for retired wind turbine blades according to claim 1, characterized in that, The molten salt conveying assembly (34) includes: A molten salt pump (341); An input pipeline (342) connected to the cavity type heat absorber (33) and the molten salt pump (341), and the molten salt pump (341) drives the molten salt to flow; An output pipeline (343) with one end connected to the cavity type heat absorber (33) and the other end connected to the pyrolysis furnace (4).

5. The pyrolysis system for obsolete wind turbine blades according to claim 4, wherein It also includes a nitrogen heating and conveying assembly, which includes a nitrogen gas storage cylinder (61), a nitrogen gas conveying pipeline (62) and a nitrogen gas preheater (65); the nitrogen gas storage cylinder (61) is connected to the nitrogen gas preheater (65) through the nitrogen gas conveying pipeline (62), the nitrogen gas preheater (65) is a shell-and-tube heat exchanger, and the shell-and-tube heat exchanger is communicated with the pyrolysis furnace (4). The waste heat of the high-temperature flue gas discharged from the pyrolysis furnace (4) is used to heat the nitrogen gas passing through the shell-and-tube heat exchanger, and then the heated nitrogen gas is conveyed into the pyrolysis furnace (4) to create an inert environment.

6. The pyrolysis system for retired wind turbine blades according to claim 1, wherein The wind power driving mechanism (1) includes: a support main body (11) with an installation cavity provided inside; a power input shaft (12) horizontally rotatably connected in the installation cavity, and one end of the power input shaft (12) extends to the outside of the support main body (11); an impeller (13) fixedly connected to one end of the power input shaft (12); a power output shaft (14) horizontally rotatably connected in the installation cavity, and one end of the power output shaft (14) extends to the outside of the support main body (11) and is connected to the crushing shaft in the crusher (2); a transmission assembly, including a first bevel gear set (15), a transmission shaft (16) and a second bevel gear set (17), the transmission shaft (16) is vertically arranged, the first bevel gear set (15) is connected between the power input shaft (12) and the transmission shaft (16), and the second bevel gear set (17) is connected between the transmission shaft (16) and the power output shaft (14).

7. The pyrolysis system for retired wind turbine blades according to claim 6, characterized in that, It also includes a pneumatic separator (7), which is used for secondary crushing, separation and screening of the retired fan blades after primary crushing by the crusher (2).

8. The pyrolysis system for retired wind turbine blades according to claim 7, wherein, It also includes a magnetic separator (8), which is used for automatic separation and recovery of the magnetic materials in the secondary fragments. The retired fan blades after magnetic separation are sent into the pyrolysis furnace (4) for pyrolysis.

Images