Heat treatment device for fan blade

Abstract

The fan blade heat treatment device comprises a reaction chamber, a reaction room, a reaction bed and a stirring device, a heating device is arranged on the inner wall of the reaction chamber, and the upper end of the reaction chamber is connected with a first cover body in an openable and closable mode; the reaction chamber is placed in the heating cavity, the heating device heats the reaction chamber, and a reaction solvent for heat treatment of the fan blade is contained in the reaction chamber; the reaction bed is arranged in the reaction room, the interior of the reaction bed is used for containing blade material strips, a plurality of through holes are evenly formed in the side wall of the reaction bed, and the upper end of the reaction bed is connected with a second cover body in an openable and closable mode; and the stirring device drives the reaction bed to horizontally rotate in the reaction chamber. According to the method, the waste fan blades can be recycled, the long glass fibers are obtained, and the economic benefits are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of recycling of wind turbine blades, and particularly to a heat treatment device for wind turbine blades. Background Art

[0002] The material composition of wind turbine blades is complex, including fibers, composite materials, fillers, adhesives, etc. Among them, the fiber composite material is the most valuable material in the blades. However, its main component resin is a thermosetting material, and the cross-linked structure property after being formed makes the waste wind turbine blade composite material unable to be directly melted and recycled.

[0003] At present, after the vast majority of wind turbine blades are retired globally, traditional non-green environmental protection technologies such as open-air stacking, landfilling, and incineration are usually adopted, resulting in resource waste and environmental pollution at the last stage of the entire green life cycle of wind power. The stability of the composite material is the key support for the use of the blades, but it has also become an obstacle to the reuse of the blades after being discarded and retired. In recent years, with the successive closure of landfills in various countries, the tightening of landfill policies, and the promotion of global carbon emission reduction targets, traditional treatment methods such as landfilling and incineration are being gradually phased out. How to realize the recycling and reuse of waste wind turbine blades has become a key issue affecting the construction of a society for resource recycling. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related technologies to some extent. For this purpose, an embodiment of the present invention provides a heat treatment device for wind turbine blades, which can recycle wind turbine blades.

[0005] An embodiment of the present invention provides a heat treatment device for wind turbine blades, including: a reaction chamber, a reaction compartment, a reaction bed, and a stirring device. The reaction chamber has a heating cavity inside, and a heating device is provided on the inner wall of the reaction chamber. The upper end of the reaction chamber is connected to a first cover in an openable and closable manner; the reaction compartment is placed inside the heating cavity, and the heating device heats the reaction compartment. A reaction solvent for heat treatment of wind turbine blades is contained inside the reaction compartment; the reaction bed is arranged inside the reaction compartment, and the inside of the reaction bed is used to contain the cut blade strips. A plurality of through holes are evenly formed in the side wall of the reaction bed, so that the reaction solvent in the reaction compartment enters the reaction bed to contact the blade strips. The upper end of the reaction bed is connected to a second cover in an openable and closable manner; the stirring device includes a motor, a stirring rod, and a placement rack. The motor is installed on the upper end of the first cover, the output shaft of the motor is fixedly connected to the stirring rod, the stirring rod extends into the reaction compartment, the stirring rod is fixedly connected to the placement rack through a connecting rod, a plurality of placement racks are provided, the reaction bed is placed inside the placement rack, and the stirring device drives the reaction bed to rotate horizontally in the reaction compartment.

[0006] In some embodiments, the heating device is a microwave heating device.

[0007] In some embodiments, the placement rack includes a bottom plate, a guardrail, an upper mouth ring and a support ring. The guardrail is fixedly connected between the upper mouth ring and the bottom plate to form a cylindrical cavity. The reaction bed is placed into the cavity from the upper mouth ring in a top-down manner. The support ring is arranged horizontally and is fixedly sleeved outside the guardrail. The support ring is fixedly connected to the bottom end of the stirring rod through a connecting rod.

[0008] In some embodiments, a support is fixed inside the heating cavity. The support is arranged at the bottom of the heating cavity, and a groove adapted to the bottom of the reaction chamber is provided at the upper end of the support to insert the reaction chamber into the groove.

[0009] In some embodiments, a pressure relief valve is provided on the first cover body.

[0010] In some embodiments, a circular slot is provided at the lower end of the first cover body. The diameter of the circular slot is slightly larger than the outer diameter of the reaction chamber. A sealing ring is fixedly connected to the bottom edge of the circular slot to enable the first cover body and the reaction chamber to be hermetically buckled.

[0011] In some embodiments, the material of the reaction chamber is silicon carbide material.

[0012] In some embodiments, the reaction bed has a cylindrical structure, and the second cover body is threadedly connected to the upper end of the reaction bed.

[0013] In some embodiments, the outer shape of the reaction chamber is cylindrical. A counterweight plate is fixedly connected to the bottom of the reaction chamber. The counterweight plate is in a disc shape, and the outer diameter of the counterweight plate is equal to the outer diameter of the reaction chamber. The height of the counterweight plate is slightly less than the depth of the groove, and the placement rack and the counterweight plate are in sliding fit.

[0014] In some embodiments, the material of the reaction bed is a corrosion-resistant and heat-conducting metal material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings,

[0016] wherein:

[0017] Figure 1 is a schematic structural diagram of a fan blade heat treatment device in an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the placement rack in

[0019] Reference numerals:

[0020] 1. Motor; 2. Stirring rod; 3. Second cover body; 4. Reaction bed; 5. Placing rack; 51. Upper mouth ring; 52. Guardrail; 53. Support ring; 54. Bottom plate; 6. Connecting rod; 7. Counterweight plate; 8. Support; 9. Reaction chamber; 10. Reaction compartment; 11. Microwave heating device; 12. First cover body; 13. Pressure relief valve. Detailed implementation manners

[0021] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0022] The heat treatment device for a fan blade according to an embodiment of the present invention will be described below with reference to the drawings.

[0023] As Figure 1 , 2 shown, the heat treatment device for a fan blade proposed by the embodiment of the present invention includes: a reaction chamber 9, a reaction compartment 10, a reaction bed 4 and a stirring device. The reaction chamber 9 has a heating cavity, and a heating device is provided on the inner wall of the reaction chamber 9. The upper end of the reaction chamber 9 is connected to a first cover body 12 in an openable and closable manner; the reaction compartment 10 is placed inside the heating cavity, and the heating device heats the reaction compartment 10. A reaction solvent for heat treatment of the fan blade is contained inside the reaction compartment 10; the reaction bed 4 is arranged inside the reaction compartment 10, and the inside of the reaction bed 4 is used to contain the cut blade strips. A plurality of through holes are evenly formed on the side wall of the reaction bed 4, so that the reaction solvent in the reaction compartment 10 enters the reaction bed 4 to contact the blade strips. The upper end of the reaction bed 4 is connected to a second cover body 3 in an openable and closable manner; the stirring device includes a motor 1, a stirring rod 2 and a placing rack 5. The motor 1 is installed on the upper end of the first cover body 12, and the output shaft of the motor 1 is fixedly connected to the stirring rod 2. The stirring rod 2 extends into the reaction compartment 10, and the stirring rod 2 is fixedly connected to the placing rack 5 through a connecting rod 6. A plurality of placing racks 5 are provided, and the reaction bed 4 is placed inside the placing rack 5. The stirring device drives the reaction bed 4 to rotate horizontally in the reaction compartment 10.

[0024] By providing the reaction chamber 9, the reaction compartment 10, the reaction bed 4 and the stirring device, the waste fan blades can be recycled to obtain longer glass fibers, improving economic benefits. By placing the fan blade strips in the reaction bed 4 for reaction, it is easier to recycle the glass fibers after the reaction. By providing the stirring device, the fan blade strips react while rotating, can be evenly heated, and the reaction efficiency is improved.

[0025] In use, the composite material of the fan blade is pre-cut into strip-shaped blade strips to ensure that the recovered glass fiber has sufficient length and use value. The blade strips are placed in the reaction bed 4, and the reaction bed 4 is placed in the placement rack 5. The stirring device, the first cover 12 and the reaction bed 4 are integrally placed into the reaction chamber 10 filled with the reaction solvent by using a lifting device or a hydraulic device. The first cover 12 is sealed with the reaction chamber 9. The heating device and the stirring device are started. The reaction solvent in the reaction chamber 10 is heated up. Due to the temperature rise, the pressure in the whole reaction chamber 9 rises. The air pump can also be used to boost the pressure of the reaction chamber 9. As the stirring device drives the reaction bed 4 to rotate, mass transfer and heat transfer occur between the reaction chamber 10 and the reaction bed 4. The reaction solvent dissolves the resin contained in the blade strips, and glass fiber is obtained after the reaction is completed. After cooling, the first cover 12 is loosened, and the stirring device, the first cover 12 and the reaction bed 4 are integrally taken out of the reaction chamber 9 by using a lifting device or a hydraulic device. After draining the solvent, the second cover 3 of the reaction bed 4 is opened, and the glass fiber is taken out.

[0026] Further, the reaction solvent includes, but is not limited to, an aqueous solution containing inorganic salts, propanol, acetone, and chloroform.

[0027] Further, the motor 1 can be replaced by a speed reducer.

[0028] Further, the stirring device is made of heat-resistant and corrosion-resistant materials.

[0029] Further, the reaction chamber 9 is provided with a tail gas treatment device to treat the harmful gases that may be generated during the reaction process and prevent air pollution.

[0030] Further, there are 3 placement racks 5, which are evenly distributed around the stirring rod 2.

[0031] In some embodiments, the heating device is a microwave heating device 11. It can improve the heating uniformity, enable the blade strips to be efficiently degraded, and the reaction process can be accurately controlled by adjusting the power of the microwave head, with high control precision.

[0032] In some embodiments, as Figure 2 shown, the placement rack 5 includes a bottom plate 54, a guardrail 52, an upper mouth ring 51 and a support ring 53. The guardrail 52 is fixedly connected between the upper mouth ring 51 and the bottom plate 54 to form a cylindrical cavity. The reaction bed 4 is placed into the cavity from the upper mouth ring 51 from top to bottom. The support ring 53 is arranged horizontally, and the support ring 53 is fixedly sleeved on the outside of the guardrail 52. The support ring 53 is fixedly connected to the bottom end of the stirring rod 2 through a connecting rod 6. Through the design of the placement rack 5, the reaction bed 4 can be conveniently taken and placed.

[0033] Further, the support ring 53 is fixedly connected to the outer periphery of the guardrail 52 by welding. The support ring 53 is thicker than the guardrail 52, which can improve the connection stability during rotation.

[0034] In some embodiments, a support 8 is fixed inside the heating chamber. The support 8 is provided at the bottom of the heating chamber. A groove adapted to the bottom of the reaction chamber 10 is formed at the upper end of the support 8 to insert the reaction chamber 10 into the groove. This can prevent the reaction chamber 10 from shaking during the agitation of the reaction solvent by the stirring device.

[0035] Furthermore, a disc-shaped groove is formed at the upper end of the support 8, and the inner diameter of the groove is slightly larger than the outer diameter of the reaction chamber 10.

[0036] In some embodiments, a pressure relief valve 13 is provided on the first cover 12. This can prevent an explosion accident caused by excessive air pressure in the reaction chamber 9.

[0037] In some embodiments, a circular slot is formed at the lower end of the first cover 12. The diameter of the circular slot is slightly larger than the outer diameter of the reaction chamber 9. A sealing ring is fixedly connected to the bottom edge of the circular slot so that the first cover 12 and the reaction chamber 9 are sealed and fastened together.

[0038] Furthermore, the following several methods can be adopted for the sealing between the first cover 12 and the reaction chamber 9: Method 1: A hydraulic mechanism is provided above the first cover 12 to press the first cover 12 downward so that the sealing ring of the first cover 12 is closely attached to the upper end of the reaction chamber 9 to achieve sealing. Method 2: A matching buckle is provided between the edge of the first cover 12 and the reaction chamber 9. After the buckle is fastened, sealing is achieved.

[0039] In some embodiments, the material of the reaction chamber 10 is silicon carbide.

[0040] The silicon carbide material has good thermal stability, thermal conductivity and chemical stability, enabling the external heating device to quickly transfer heat to the reaction solvent. Moreover, the reaction chamber 10 will not deform under long-term high-temperature heating, and the reaction solvent will not corrode the reaction chamber 10, thus extending its service life.

[0041] In some embodiments, the reaction bed 4 has a cylindrical structure, and the second cover 3 is threadedly connected to the upper end of the reaction bed 4.

[0042] In some embodiments, the outer shape of the reaction chamber 10 is cylindrical. A counterweight plate 7 is fixedly connected to the bottom of the reaction chamber 10. The counterweight plate 7 is disc-shaped, and the outer diameter of the counterweight plate 7 is equal to the outer diameter of the reaction chamber 10. The height of the counterweight plate 7 is slightly less than the depth of the groove, and the placement rack 5 is slidably engaged with the counterweight plate 7.

[0043] The counterweight plate 7 can support the placement rack 5, preventing deformation or fracture at the connecting rod 6 due to the self-weights of the placement rack 5 and the reaction bed 4 and the weight of the blade strips during long-term rotation. At the same time, due to its own weight, the counterweight plate 7 can ensure that the reaction chamber 10 is stably placed in the groove of the support 8.

[0044] In some embodiments, the reaction bed 4 is made of a corrosion-resistant and heat-conductive metal material, preferably copper or stainless steel.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A fan blade heat treatment device, characterized in that: include: A reaction chamber, wherein the reaction chamber has a heating cavity, the inner wall of the reaction chamber is provided with a heating device, and the upper end of the reaction chamber can be opened and closed to connect with the first cover body; A reaction chamber, the reaction chamber is placed inside the heating chamber, the heating device heats the reaction chamber, and the reaction chamber contains a reaction solvent for heat treatment of the fan blades; A reaction bed, the reaction bed is arranged inside the reaction room, the interior of the reaction bed is used to hold the cut blade strips, a plurality of through holes are evenly opened on the side wall of the reaction bed, so that the reaction solvent in the reaction room enters the reaction bed and contacts the blade strips, and the upper end of the reaction bed can be opened and closed to connect with the second cover body; A stirring device, the stirring device comprises a motor, a stirring rod and a placement rack, the motor is installed at the upper end of the first cover body, the output shaft of the motor is fixedly connected to the stirring rod, the stirring rod extends into the reaction room, the stirring rod is fixedly connected to the placement rack through a connecting rod, a plurality of placement racks are provided, the reaction bed is placed inside the placement rack, and the stirring device drives the reaction bed to rotate horizontally in the reaction room.

2. The fan blade heat treatment device according to claim 1, characterized in that: The heating device is a microwave heating device.

3. The fan blade heat treatment device according to claim 1, characterized in that: The placement rack includes a bottom plate, a guardrail, an upper ring and a support ring. The guardrail is fixedly connected between the upper ring and the bottom plate to form a cylindrical cavity. The reaction bed is placed into the cavity from top to bottom from the upper ring. The support ring is arranged in a horizontal direction and is fixedly sleeved on the outside of the guardrail. The support ring is fixedly connected to the bottom end of the stirring rod through the connecting rod.

4. The fan blade heat treatment device according to claim 1, characterized in that: A support is fixed inside the heating chamber, and the support is arranged at the bottom of the heating chamber. A groove matching the bottom of the reaction room is opened at the upper end of the support so that the reaction room can be inserted into the groove.

5. The fan blade heat treatment device according to claim 1, characterized in that: The first cover body is provided with a pressure relief valve.

6. The fan blade heat treatment device according to claim 1, characterized in that: A circular slot is provided at the lower end of the first cover body, the diameter of which is slightly larger than the outer diameter of the reaction chamber, and a sealing ring is fixedly connected to the bottom edge of the circular slot to seal the first cover body and the reaction chamber.

7. The fan blade heat treatment device according to claim 1, characterized in that: The material of the reaction chamber is silicon carbide material.

8. The fan blade heat treatment device according to claim 1, characterized in that: The reaction bed is a cylindrical structure, and the second cover is connected to the upper end of the reaction bed via threads.

9. The fan blade heat treatment device according to claim 4, characterized in that: The shape of the reaction room is cylindrical, and a counterweight plate is fixedly connected to the bottom of the reaction room. The counterweight plate is disc-shaped, and the outer diameter of the counterweight plate is equal to the outer diameter of the reaction room. The height of the counterweight plate is slightly smaller than the depth of the groove, and the placement rack and the counterweight plate are slidably matched.

10. The fan blade heat treatment device according to any one of claims 1 to 9, characterized in that: The reaction bed is made of corrosion-resistant heat-conducting metal material.

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