Solid waste pyrolysis furnace and solid waste pyrolysis system

Abstract

This invention discloses a solid waste pyrolysis furnace and system, relating to the field of solid waste treatment technology. The pyrolysis furnace has a feed inlet and a discharge outlet. The feed inlet is used to introduce the solid waste to be treated, and the discharge outlet is used to discharge the high-value-added products obtained through the pyrolysis reaction, which have reuse value. Flexible connectors are provided at both the feed inlet and the discharge outlet, respectively connecting them to the feed and discharge components. The solid waste pyrolysis furnace and system provided by this invention can extend the service life of the pyrolysis system. It can efficiently separate and convert resin and glass fiber in solid waste such as decommissioned wind turbine blades and waste fiberglass, producing pyrolysis oil, syngas, and reusable glass fiber materials, thus achieving closed-loop recycling of waste resources.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, and in particular to a solid waste pyrolysis furnace and a solid waste pyrolysis system. Background Technology

[0002] With rapid economic development, the output of solid waste, especially industrial solid waste such as decommissioned wind turbine blades, waste fiberglass, waste tires, and waste plastics, is constantly increasing, causing increasingly serious environmental pollution. The treatment of solid waste has become a widespread concern in all sectors of society. Pyrolysis technology, with its low pollution emissions and high energy recovery and resource recycling rates, is attracting increasing attention.

[0003] To meet the requirements of continuous pyrolysis, existing pyrolysis equipment usually uses pyrolysis furnaces for continuous and uninterrupted pyrolysis. However, during use, the existing pyrolysis furnaces will expand due to high temperature, causing the whole furnace to deform, which can easily lead to damage to the pyrolysis processing equipment connected to it, such as conveying equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a solid waste pyrolysis furnace and a solid waste pyrolysis system to solve the problems existing in the prior art and improve the service life of the pyrolysis system.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a solid waste pyrolysis furnace, comprising a pyrolysis furnace having a feed inlet and a discharge outlet. The feed inlet is used to introduce solid waste to be treated, and the discharge outlet is used to discharge the products after the pyrolysis reaction. Both the feed inlet and the discharge outlet are provided with flexible connectors, and the feed inlet and the discharge outlet are respectively connected to the feed component and the discharge component through the flexible connectors.

[0006] Preferably, it further includes wind-blocking components disposed at the inlet and the outlet, the wind-blocking components being used to allow solid waste to pass through while blocking airflow.

[0007] Preferably, the pyrolysis furnace includes a cylinder, a drive mechanism, a heating assembly, and a stirring assembly. The cylinder has an inlet and an outlet on its axial sides, respectively, communicating with the interior. The stirring assembly is axially disposed within the cylinder, and one end of the stirring assembly is connected to the drive mechanism disposed outside the cylinder. The drive mechanism can drive the stirring assembly to stir within the cylinder and push the solid waste towards the outlet. The heating assembly is disposed within the cylinder and is used to heat the interior of the cylinder.

[0008] Preferably, the stirring assembly includes a stirring shaft and helical blades. The helical blades are arranged axially on the outer wall of the stirring shaft. The driving end of the driving mechanism can be sealed and extended into the cylinder and connected to the stirring shaft for transmission. The driving mechanism can drive the stirring shaft to rotate and stir the helical blades, and can push the solid waste towards the discharge port.

[0009] Preferably, the heating assembly includes a heating rod, the stirring shaft is hollow, and the heating rod can be sealed and extended into the cylinder from the end of the cylinder away from the driving mechanism, and extend into the stirring shaft axially.

[0010] Preferably, the heating assembly further includes a heating belt for covering the outer periphery of the cylinder, and a heat insulation layer is provided between the heating belt and the outer wall of the cylinder.

[0011] Preferably, cooling components are provided at both ends of the cylinder along its axial direction; and explosion-proof components are provided on the cylinder.

[0012] Preferably, the pyrolysis gas furnace further includes a protective gas inlet, a pyrolysis gas outlet, and a monitoring component. The protective gas inlet is located near the feed inlet on the lower side of the pyrolysis furnace, the pyrolysis gas outlet is located near the discharge inlet on the upper side of the pyrolysis furnace, and the monitoring component is located on the pyrolysis furnace. The protective gas inlet is used to introduce protective gas into the pyrolysis furnace, the pyrolysis gas is used to discharge the pyrolysis gas generated from solid waste in the pyrolysis furnace, and the monitoring component is used to monitor the temperature, pressure, and oxygen content information inside the pyrolysis furnace.

[0013] Preferably, one end of the pyrolysis furnace is fixedly supported on a fixed surface in the axial direction, and the other end is slidably supported on the fixed surface.

[0014] The present invention also provides a solid waste pyrolysis system, including a feeding component, a discharging component, and a solid waste pyrolysis furnace as described above. The feeding component is used to transport solid waste to the solid waste pyrolysis furnace, and the products obtained by pyrolysis in the solid waste pyrolysis furnace can be discharged to the discharging component and transported through the discharging component; and the discharging component is provided with a discharging cooling component.

[0015] The present invention achieves the following technical effects compared to the prior art: The solid waste pyrolysis furnace and system provided by this invention can pyrolyze industrial solid waste such as decommissioned wind turbine blades and waste fiberglass. By installing flexible connectors at both the inlet and outlet of the pyrolysis furnace, which are connected to the inlet and outlet components respectively, the furnace body will expand during heating operation. The flexible connectors can offset the displacement changes caused by the expansion and protect the interface from damage. Moreover, it can efficiently convert the resin and glass fiber in solid waste such as decommissioned wind turbine blades and waste fiberglass into pyrolysis oil, syngas, and renewable glass fiber materials through pyrolysis technology, achieving the goal of targeted conversion and recycling of waste resources. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the solid waste pyrolysis system provided by the present invention; Figure 2 This is a cross-sectional schematic diagram of the pyrolysis furnace provided by the present invention.

[0018] In the diagram: 1-Pyrolysis furnace; 11-Feed inlet; 12-Discharge outlet; 13-Flexible connector; 14-Air baffle; 15-Sliding mechanism; 16-Cylinder; 161-Cooling component; 162-Protective gas inlet; 163-Pyrolysis gas outlet; 164-Monitoring component; 1641-Thermometer; 1642-Pressure gauge; 1643-Oxygen analyzer; 165-Explosion-proof component; 17-Drive mechanism; 171-Motor; 172-Reducer; 173-Coupling; 174-Bearing seat; 18-Heating component; 181-Heating rod; 182-Heating belt; 183-Insulation layer; 19-Stirring component; 191-Stirring shaft; 192-Helical blade; 2-Feed component; 3-Discharge component; 31-Discharge cooling component. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a solid waste pyrolysis furnace and a solid waste pyrolysis system to solve the problems existing in the prior art and improve the service life of the pyrolysis system.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 This embodiment provides a solid waste pyrolysis furnace, such as a decommissioned wind turbine blade pyrolysis furnace. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 The pyrolysis furnace 1 includes a feed inlet 11 and a discharge outlet 12. The feed inlet 11 is used to introduce solid waste to be treated, such as decommissioned wind turbine blades after crushing. The discharge outlet 12 is used to discharge the pyrolysis products, such as glass fiber. Both the feed inlet 11 and the discharge outlet 12 are provided with flexible connectors 13, which are used to connect the feed component 2 and the discharge component 3 respectively.

[0023] In this process, flexible connectors 13 are provided at both the inlet 11 and outlet 12 of the pyrolysis furnace 1. The inlet 11 and outlet 12 are connected to the inlet component 2 and outlet component 3 respectively through the flexible connectors 13. During the heating and operation of the pyrolysis furnace 1, the machine body will generate a certain amount of expansion. The flexible connectors 13 can offset the displacement changes caused by the expansion and protect the interface from damage. Furthermore, it can efficiently convert the resin and glass fiber in solid waste such as retired wind turbine blades into pyrolysis oil, syngas and renewable glass fiber materials respectively through pyrolysis technology, thereby achieving the goal of targeted conversion and recycling of waste resources.

[0024] Specifically, the flexible connector 13 is configured as a corrugated compensator, such as made of stainless steel or alloy.

[0025] In the optional scheme of this embodiment, more preferably, the solid waste pyrolysis furnace provided in this embodiment also includes a wind-blocking component 14 disposed at the feed inlet 11 and the discharge outlet 12. The wind-blocking component 14 is used to allow the decommissioned wind turbine blades to pass through and to block the airflow.

[0026] Specifically, by installing air-blocking components 14 at the feed inlet and discharge outlet 12 of the pyrolysis furnace 1, air is prevented from entering the pyrolysis furnace 1 along with the material, and pyrolysis gas is prevented from mixing with air and causing a flash explosion. Specifically, the air-blocking component 14 is set as a closed air valve, which can be installed in the connecting pipeline near the feed component 2 or the discharge component 3.

[0027] In the optional embodiments of this example, more preferably, the pyrolysis furnace 1 includes a cylinder 16, a drive mechanism 17, a heating component 18, and a stirring component 19. The cylinder 16 has an inlet 11 and an outlet 12 communicating with the interior on both axial sides. The stirring component 19 is arranged axially inside the cylinder 16, and one end of the stirring component 19 is connected to the drive mechanism 17 located outside the cylinder 16. The drive mechanism 17 can drive the stirring component 19 to stir inside the cylinder 16 and can push the decommissioned wind turbine blades to move towards the outlet 12. The heating component 18 is arranged in the cylinder 16 and is used to heat the interior of the cylinder 16.

[0028] The cylinder 16 is a cylindrical shape. The decommissioned wind turbine blades enter the cylinder 16 through the feed inlet 11 and are driven by the drive mechanism 17. The stirring assembly 19 stirs the decommissioned wind turbine blades to fully pyrolyze them and pushes the solid waste to the discharge outlet 12. The heating assembly 18 can heat the inside of the cylinder 16 to pyrolyze the decommissioned wind turbine blades.

[0029] In the optional embodiment, more preferably, the stirring assembly 19 includes a stirring shaft 191 and a spiral blade 192. The spiral blade 192 is axially arranged on the outer wall of the stirring shaft 191. The driving end of the driving mechanism 17 can be sealed and extended into the cylinder 16 and connected to the stirring shaft 191 for transmission. The driving mechanism 17 can drive the stirring shaft 191 to rotate and stir the spiral blade 192, and can push the decommissioned wind turbine blades to move towards the discharge port 12.

[0030] Among them, the spiral blades 192 can be of various types, such as solid spiral blades, ribbon spiral blades, paddle spiral blades or toothed spiral blades. One or more types of spiral blades 192 are set on the stirring shaft 191 of the material to meet the stirring and pushing of the material. It should be noted that at least one section of the stirring shaft 191 near the inlet 11 and the outlet 12 is set as a pushing section, which can push the retired wind turbine blades to move. The stirring shaft 191 rotates at a speed of 0.2 to 20 revolutions per minute under the drive of the drive mechanism 17.

[0031] Furthermore, the cylinder 16, stirring shaft 191, and spiral blade 192 are all made of 316L or 310S materials.

[0032] Furthermore, the drive mechanism 17 includes a motor 171, a reducer 172, a coupling 173, and a bearing housing 174 connected in sequence. The motor 171 is connected to the stirring shaft 191 in sequence through the reducer 172, the coupling 173, and the bearing housing 174. The bearing housing 174 is connected to the stirring shaft 191 in sequence through a connecting shaft extending into the cylinder 16.

[0033] In the optional embodiment, more preferably, the heating component 18 includes a heating rod 181 and a hollow stirring shaft 191. The heating rod 181 can be sealed and extended into the cylinder 16 from the end of the cylinder 16 away from the driving mechanism 17, and extend into the stirring shaft 191 axially.

[0034] The stirring shaft 191 is a hollow shaft, and a heating rod 181 is inserted inside the shaft for heating the middle and later heating sections; so as to pyrolyze the decommissioned wind turbine blades in the pyrolysis furnace 1.

[0035] In the optional embodiment, more preferably, the heating component 18 further includes a heating band 182, which is used to cover the outer periphery of the cylinder 16, and a heat insulation layer 183 is provided between the heating band 182 and the outer wall of the cylinder 16.

[0036] The heating belt 182 is configured as an electromagnetic induction heating belt, and the insulation layer 183 covers the outside of the cylinder 16. The heating belt 182 can heat the stirring shaft 191 and the cylinder 16 through electromagnetic induction. During the operation of the pyrolysis furnace 1, the materials are pyrolyzed under the heating action of the heating belt 182 and the heating rod 181. The insulation layer 183 prevents the high temperature of the cylinder 16 from damaging the heating belt 182. Specifically, the insulation layer 183 can be made of aluminum silicate fiberboard, rock wool, or ceramic fiberboard.

[0037] In the optional embodiments of this example, it is more preferred that cooling components 161 are provided at both ends of the cylinder 16 along the axial direction; and explosion-proof components 165 are provided on the cylinder 16.

[0038] The cylinder 16 has through holes at both ends for the drive end of the drive mechanism 17 to extend into and the heating rod 181 to extend into, respectively. To ensure the internal sealing of the cylinder 16, a shaft seal is provided at the through hole. To prevent the shaft seal from being damaged by high temperature, a cooling component 161 is provided on the side end face for cooling. Specifically, the cooling component 161 is a cooling water jacket. Moreover, explosion protection is achieved by providing an explosion-proof component 165 in the pyrolysis furnace 1. Specifically, the explosion-proof component 165 is an explosion-proof sheet.

[0039] In a preferred embodiment, the solid waste pyrolysis furnace provided in this embodiment further includes a protective gas inlet 162, a pyrolysis gas outlet 163, and a monitoring component 164. The protective gas inlet 162 is located near the feed inlet 11 on the lower side of the pyrolysis furnace 1, the pyrolysis gas outlet 163 is located near the discharge outlet 12 on the upper side of the pyrolysis furnace 1, and the monitoring component 164 is located on the pyrolysis furnace 1. The protective gas inlet 162 is used to introduce protective gas into the pyrolysis furnace 1, the pyrolysis gas is used to discharge the pyrolysis synthesis gas generated by the solid waste in the pyrolysis furnace 1, and the monitoring component 164 is used to monitor the temperature, pressure, and oxygen content information inside the pyrolysis furnace 1.

[0040] The protective gas inlet 162 is a nitrogen inlet used to purge the internal space of the pyrolysis furnace 1 during start-up and shutdown to prevent pyrolysis gas from mixing with air and causing a flash explosion. Solid waste is subjected to high temperatures of 200-800℃ during its movement inside the pyrolysis furnace 1, and the organic components in the solid waste undergo pyrolysis to produce pyrolysis gas and carbon black. The pyrolysis gas is discharged from the pyrolysis gas outlet 163, and the non-organic components in the material exist as solid residues after the material pyrolysis is completed and are discharged from the discharge port 12. The monitoring components 164 are a temperature gauge 1641, a pressure gauge 1642, and an oxygen analyzer 1643, which measure the temperature, pressure, and oxygen content of the internal space of the pyrolysis furnace 1, respectively.

[0041] In addition, during the operation of pyrolysis furnace 1, under the suction force of the blower of the pyrolysis gas treatment system, the operating pressure of the internal space of pyrolysis furnace 1 is controlled to -1kPa~0kPa through the pyrolysis gas outlet 163.

[0042] In the optional scheme of this embodiment, more preferably, one end of the pyrolysis furnace 1 is fixedly supported on the fixed surface in the axial direction, and the other end is slidably supported on the fixed surface.

[0043] One end of the pyrolysis furnace 1 can be fixedly connected to the ground by bolts or other means, and the other end can be slidably supported on the ground along the axis by a sliding mechanism 15, which can meet the displacement caused by thermal expansion of the pyrolysis furnace 1. Specifically, the sliding mechanism 15 can be set as a conventional slide rail mechanism.

[0044] Example 2 This embodiment provides a solid waste pyrolysis system, such as a decommissioned wind turbine blade or a waste fiberglass pyrolysis system, including a feeding component 2, a discharging component 3, and a solid waste pyrolysis furnace as in Embodiment 1. The feeding component 2 is used to transport solid waste to the solid waste pyrolysis furnace, and the products generated after pyrolysis in the solid waste pyrolysis furnace can be discharged to the discharging component 3 and transported through the discharging component 3; and the discharging component 3 is provided with a discharging cooling component 31.

[0045] Both the feeding component 2 and the discharging component 3 are equipped with a screw mechanism made of stainless steel to meet the feeding and discharging requirements. The high-value solid products after pyrolysis have a certain temperature. The discharging component 3 is equipped with a discharging cooling component 31 to cool the material to below 50°C. Specifically, the discharging cooling component 31 is a cooling water jacket. In addition, depending on the characteristics of the material, a single or multiple sets can be used in series to achieve anaerobic pyrolysis of industrial solid waste.

[0046] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A solid waste pyrolysis furnace, characterized in that: The pyrolysis furnace (1) includes a feed inlet (11) and a discharge outlet (12). The feed inlet (11) is used to introduce solid waste to be treated, and the discharge outlet (12) is used to discharge the products after the pyrolysis reaction. Both the feed inlet (11) and the discharge outlet (12) are provided with flexible connectors (13). The feed inlet (11) and the discharge outlet (12) are respectively connected to the feed component (2) and the discharge component (3) through the flexible connectors (13).

2. The solid waste pyrolysis furnace according to claim 1, characterized in that: It also includes a wind-blocking component (14) disposed at the feed inlet (11) and the discharge outlet (12), the wind-blocking component (14) being used to allow solid waste to pass through and to block airflow.

3. The solid waste pyrolysis furnace according to claim 1, characterized in that: The pyrolysis furnace (1) includes a cylinder (16), a drive mechanism (17), a heating component (18), and a stirring component (19). The cylinder (16) has an inlet (11) and an outlet (12) on its axial sides, which communicate with the interior. The stirring component (19) is arranged axially inside the cylinder (16), and one end of the stirring component (19) is connected to the drive mechanism (17) located outside the cylinder (16). The drive mechanism (17) can drive the stirring component (19) to stir inside the cylinder (16) and can push solid waste toward the outlet (12). The heating component (18) is arranged in the cylinder (16) and is used to heat the interior of the cylinder (16).

4. The solid waste pyrolysis furnace according to claim 3, characterized in that: The stirring assembly (19) includes a stirring shaft (191) and a spiral blade (192). The spiral blade (192) is axially arranged on the outer wall of the stirring shaft (191). The driving end of the driving mechanism (17) can be sealed and extended into the cylinder (16) and connected to the stirring shaft (191) for transmission. The driving mechanism (17) can drive the stirring shaft (191) to drive the spiral blade (192) to rotate and stir, and can push the solid waste to the discharge port (12).

5. The solid waste pyrolysis furnace according to claim 4, characterized in that: The heating assembly (18) includes a heating rod (181), and the stirring shaft (191) is hollow. The heating rod (181) can be sealed and extended into the cylinder (16) from one end away from the driving mechanism (17), and extend into the stirring shaft (191) axially.

6. The solid waste pyrolysis furnace according to claim 5, characterized in that: The heating assembly (18) further includes a heating band (182), which is used to cover the outer periphery of the cylinder (16), and a heat insulation layer (183) is provided between the heating band (182) and the outer wall of the cylinder (16).

7. The solid waste pyrolysis furnace according to claim 5, characterized in that: Cooling components (161) are provided at both ends of the cylinder (16) along its axial direction; and explosion-proof components (165) are provided on the cylinder (16).

8. The solid waste pyrolysis furnace according to claim 1, characterized in that: It also includes a protective gas inlet (162), a pyrolysis gas outlet (163), and a monitoring component (164). The protective gas inlet (162) is located near the feed inlet (11) on the lower side of the pyrolysis furnace (1), the pyrolysis gas outlet (163) is located near the discharge outlet (12) on the upper side of the pyrolysis furnace (1), and the monitoring component (164) is located on the pyrolysis furnace (1). The protective gas inlet (162) is used to introduce protective gas into the pyrolysis furnace (1), the pyrolysis gas is used to discharge the pyrolysis gas generated by solid waste in the pyrolysis furnace (1), and the monitoring component (164) is used to monitor the temperature, pressure, and oxygen content information in the pyrolysis furnace (1).

9. The solid waste pyrolysis furnace according to claim 1, characterized in that: The pyrolysis furnace (1) is axially supported at one end on a fixed surface and slidably supported at the other end on the fixed surface.

10. A solid waste pyrolysis system, characterized in that: The device includes a feeding component (2), a discharging component (3), and a solid waste pyrolysis furnace as described in any one of claims 1-9. The feeding component (2) is used to transport solid waste to the solid waste pyrolysis furnace, and the products obtained from pyrolysis in the solid waste pyrolysis furnace can be discharged to the discharging component (3) and transported through the discharging component (3). The discharging component (3) is provided with a discharging cooling assembly (31).

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