Recovery particles for retired wind power blades, preparation method and application

Abstract

The invention discloses a retired wind power blade recovery particle, a preparation method and application, and relates to the technical field of wind power recovery, and the technical scheme is characterized in that the retired wind power blade recovery particle comprises wind power blade crushing modified particles, matrix asphalt, sodium dodecyl benzene sulfonate and SBS, the wind power blade broken modified particles, the matrix asphalt, the sodium dodecyl benzene sulfonate and the SBS are mixed according to the mass ratio of (18-30): 100: (1-3): (12-16); the wind power blade broken modified particles are obtained by modifying wind power blade broken particles. The method has the advantages that the wind power blade crushed particles are effectively recycled, and the asphalt material is prepared from the wind power blade crushed modified particles obtained by modifying the wind power blade crushed particles, so that the compatibility between the wind power blade crushed modified particles and the asphalt is improved, and the effects of remarkably improving the strength of the asphalt and lightening the asphalt are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power recycling, and more specifically to a retired wind power blade recycling particle, a preparation method and an application thereof. Background Art

[0002] Wind turbine blades are typically made of glass fiber or carbon fiber reinforced composites, which are strong and lightweight, but are complicated to handle after retirement due to their large size and resistance to degradation.

[0003] The crushing equipment in the existing technology has certain difficulties in processing glass fibers. Therefore, for the processing of wind turbine blades, more powerful equipment must be used, namely wind turbine blade shredders. Wind turbine blade shredder is a high-efficiency equipment designed specifically for the processing of waste wind turbine blades. It uses advanced shredding technology to effectively tear and process waste wind turbine blades. Among them, the effective decomposition and processing of the fiber structure of glass fibers is one of the core tasks of the wind turbine blade shredder. With the rapid development of the wind power industry and the emphasis on sustainability, the technology of wind turbine blade shredders is constantly improving, including improving crushing efficiency, reducing energy consumption, extending tool life, and reducing environmental impact. At the same time, policymakers and industry participants are also exploring more effective blade recycling strategies to promote the development of a green circular economy in the wind power industry.

[0004] However, there is still some uncertainty in the recycling of the torn and processed particles of the wind turbine blades obtained. It is difficult to effectively utilize the advantages of high strength and light weight, which needs to be improved. Summary of the invention

[0005] In view of this, the first purpose of the present application is to provide a method for recycling particles from retired wind turbine blades to achieve the purpose of effectively utilizing the functions of retired wind turbine blades. The specific scheme is as follows:

[0006] A retired wind turbine blade recycling particle comprises wind turbine blade crushed and modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS, wherein the wind turbine blade crushed and modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS are mixed in a mass ratio of 18-30:100:1-3:12-16; the wind turbine blade crushed and modified particles are obtained by modifying the wind turbine blade crushed particles.

[0007] Preferably: the preparation of the wind turbine blade crushed and modified particles comprises the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining the wind turbine blade crushed and modified particles.

[0008] Preferably: in step ②, the modification treatment is to mix the broken particles with a nitric acid solution with a pH of 2, obtain hydroxylated broken particles after heating treatment, and then mix the hydroxylated broken particles with an acetone solution of maleic anhydride to obtain maleic anhydride broken particles, and finally distribute the maleic anhydride broken particles in a succinic acid aqueous solution, control the temperature of the succinic acid aqueous solution to 50-60°C, stir and react for 1-3h, finally cool to room temperature, add KH560, stir and react for 12-18h, and wash and dry.

[0009] Preferably, the mass ratio of the crushed particles to the nitric acid solution is 1:4-6.

[0010] Preferably, the mass ratio of the hydroxylated crushed particles to the maleic anhydride in the acetone solution of maleic anhydride is 1:6-9.

[0011] Preferably, the mass ratio of the maleic anhydride-treated crushed particles to the succinic acid in the succinic acid aqueous solution is 1:3-4.

[0012] Preferably, the invention further comprises an auxiliary agent, which is at least one of a compatibilizer, a stabilizer, an antioxidant and a thickener, and the amount of the auxiliary agent added is 4-8 wt % of the total mass.

[0013] The second object of the present invention is to provide a method for preparing recycled particles from retired wind turbine blades, which is used to prepare the recycled particles from retired wind turbine blades as described above, including a wind turbine blade crushed and modified particle preparation part and a mixing preparation part; the wind turbine blade crushed and modified particle preparation part is used to prepare wind turbine blade crushed and modified particles, and the mixing preparation part includes mixing, stirring and shearing the wind turbine blade crushed and modified particles with base asphalt, sodium dodecylbenzene sulfonate and SBS at 180°C to obtain recycled particles from retired wind turbine blades.

[0014] Preferably: the preparation part of the wind turbine blade crushed and modified particles includes the step of ① crushing the retired wind turbine blades and obtaining crushed particles; and the step of ② modifying the crushed particles and obtaining the wind turbine blade crushed and modified particles.

[0015] The third object of the present invention is to provide an application of particles recovered from retired wind turbine blades, including using the particles recovered from retired wind turbine blades as described above and applying them to road paving.

[0016] It can be seen from the above scheme that the present application provides a retired wind turbine blade recycling particle, preparation method and application. The retired wind turbine blade recycling particles are modified by modifying the wind turbine blade crushed particles with poor compatibility with asphalt to obtain wind turbine blade crushed modified particles with high compatibility with asphalt, thereby combining asphalt with wind turbine blade crushed modified particles to form high-strength and lightweight retired wind turbine blade recycling particles, which significantly improves the structural strength of asphalt, thereby extending the service life of asphalt while reducing the density of asphalt and reducing the reuse of retired wind turbine blade recycling particles. The preparation method of retired wind turbine blade recycling particles has the effect of convenient process and low operating difficulty. The application of the retired wind turbine blade recycling particles has the effect of significantly improving the road paving strength, reducing the difficulty of road paving and extending the service life of the paved road. DETAILED DESCRIPTION

[0017] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] It should be mentioned that the base asphalt in the embodiments of the present application is 90# or 70# asphalt, and the base asphalt is 70#A grade asphalt purchased from Maoming Petrochemical Donghai brand asphalt.

[0019] The following is a detailed description of the particles recovered from retired wind turbine blades, the preparation method and the application of the present application.

[0020] A retired wind turbine blade recycling particle includes wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS. The wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS are mixed according to a mass ratio of 18-30:100:1-3:12-16, and the wind turbine blade crushed modified particles are obtained by modifying the wind turbine blade crushed particles to solve the problem of low compatibility between the existing wind turbine blade crushed particles and the base asphalt.

[0021] It should be noted that the preparation of the modified particles of wind turbine blades includes the steps of ① crushing the retired wind turbine blades and obtaining the crushed particles; and ② modifying the crushed particles and obtaining the modified particles of wind turbine blades. The modification treatment is to mix the crushed particles with a nitric acid solution with a pH of 2, control the mass ratio of the crushed particles to the nitric acid solution to be 1:4-6, obtain hydroxylated crushed particles after heating at a temperature of 50-55°C, and then mix the hydroxylated crushed particles with an acetone solution of maleic anhydride to react, control the mass ratio of the hydroxylated crushed particles to the maleic anhydride in the acetone solution of maleic anhydride to be 1:6-9, obtain maleic anhydride crushed particles, and finally distribute the maleic anhydride crushed particles in a succinic acid aqueous solution, control the mass ratio of the maleic anhydride crushed particles to the succinic acid in the succinic acid aqueous solution to be 1:3-4, and control the temperature of the succinic acid aqueous solution to be 50-60°C, stir and react for 1-3h, and finally cool to room temperature, add KH560, stir and react for 12-18h, and wash and dry.

[0022] A method for preparing recycled particles from retired wind turbine blades, used for preparing the recycled particles from retired wind turbine blades as described above, including a wind turbine blade crushing and modification particle preparation part and a mixing preparation part. The wind turbine blade crushing and modification particle preparation part is used to prepare the wind turbine blade crushing and modification particles, and the mixing preparation part includes mixing, stirring and shearing the wind turbine blade crushing and modification particles with base asphalt, sodium dodecylbenzene sulfonate and SBS at 180°C to obtain recycled particles from retired wind turbine blades. The wind turbine blade crushing and modification particle preparation part includes the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining crushed and modification particles from wind turbine blades.

[0023] An application of particles recovered from retired wind turbine blades, comprising using the particles recovered from retired wind turbine blades as described above and applying them to road paving.

[0024] Embodiment 1

[0025] A retired wind turbine blade recycling particle includes wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS. The wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS are mixed in a mass ratio of 18:100:1:12, and the wind turbine blade crushed modified particles are obtained by modifying the wind turbine blade crushed particles to solve the problem of low compatibility between the existing wind turbine blade crushed particles and the base asphalt.

[0026] It should be noted that the preparation of the modified particles of wind turbine blades includes the steps of ① crushing the retired wind turbine blades and obtaining the crushed particles; and ② modifying the crushed particles and obtaining the modified particles of wind turbine blades. The modification treatment is to mix the crushed particles with a nitric acid solution with a pH of 2, control the mass ratio of the crushed particles to the nitric acid solution to be 1:4, obtain hydroxylated crushed particles after heating at a temperature of 50°C, and then mix the hydroxylated crushed particles with an acetone solution of maleic anhydride to react, control the mass ratio of the hydroxylated crushed particles to the maleic anhydride in the acetone solution of maleic anhydride to be 1:6, obtain maleic anhydride crushed particles, and finally distribute the maleic anhydride crushed particles in a succinic acid aqueous solution, control the mass ratio of the maleic anhydride crushed particles to the succinic acid in the succinic acid aqueous solution to be 1:3, and control the temperature of the succinic acid aqueous solution to be 50°C and stir for 3 hours, and finally cool to room temperature, add KH560 and stir for 12 hours and wash and dry.

[0027] A method for preparing recycled particles from retired wind turbine blades, used for preparing the recycled particles from retired wind turbine blades as described above, including a wind turbine blade crushing and modification particle preparation part and a mixing preparation part. The wind turbine blade crushing and modification particle preparation part is used to prepare the wind turbine blade crushing and modification particles, and the mixing preparation part includes mixing, stirring and shearing the wind turbine blade crushing and modification particles with base asphalt, sodium dodecylbenzene sulfonate and SBS at 180°C to obtain recycled particles from retired wind turbine blades. The wind turbine blade crushing and modification particle preparation part includes the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining crushed and modification particles from wind turbine blades.

[0028] An application of particles recovered from retired wind turbine blades, comprising using the particles recovered from retired wind turbine blades as described above and applying them to road paving.

[0029] Embodiment 2

[0030] A retired wind turbine blade recycling particle includes wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS. The wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS are mixed in a mass ratio of 24:100:2:15, and the wind turbine blade crushed modified particles are obtained by modifying the wind turbine blade crushed particles to solve the problem of low compatibility between the existing wind turbine blade crushed particles and the base asphalt.

[0031] It should be noted that the preparation of the modified particles of wind turbine blades includes the steps of ① crushing the retired wind turbine blades and obtaining the crushed particles; and ② modifying the crushed particles and obtaining the modified particles of wind turbine blades. The modification treatment is to mix the crushed particles with a nitric acid solution with a pH of 2, control the mass ratio of the crushed particles to the nitric acid solution to be 1:5, obtain hydroxylated crushed particles after heating at a controlled temperature of 53°C, and then mix the hydroxylated crushed particles with an acetone solution of maleic anhydride to react, control the mass ratio of the hydroxylated crushed particles to the maleic anhydride in the acetone solution of maleic anhydride to be 1:7, obtain maleic anhydride crushed particles, and finally distribute the maleic anhydride crushed particles in a succinic acid aqueous solution, control the mass ratio of the maleic anhydride crushed particles to the succinic acid in the succinic acid aqueous solution to be 1:3.5, and control the temperature of the succinic acid aqueous solution to be 55°C and stir for 2h, and finally cool to room temperature, add KH560 and stir for 16h and wash and dry.

[0032] A method for preparing recycled particles from retired wind turbine blades, used for preparing the recycled particles from retired wind turbine blades as described above, including a wind turbine blade crushing and modification particle preparation part and a mixing preparation part. The wind turbine blade crushing and modification particle preparation part is used to prepare the wind turbine blade crushing and modification particles, and the mixing preparation part includes mixing, stirring and shearing the wind turbine blade crushing and modification particles with base asphalt, sodium dodecylbenzene sulfonate and SBS at 180°C to obtain recycled particles from retired wind turbine blades. The wind turbine blade crushing and modification particle preparation part includes the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining crushed and modification particles from wind turbine blades.

[0033] An application of particles recovered from retired wind turbine blades, comprising using the particles recovered from retired wind turbine blades as described above and applying them to road paving.

[0034] Embodiment 3

[0035] A retired wind turbine blade recycling particle includes wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS. The wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS are mixed in a mass ratio of 30:100:3:16, and the wind turbine blade crushed modified particles are obtained by modifying the wind turbine blade crushed particles to solve the problem of low compatibility between the existing wind turbine blade crushed particles and the base asphalt.

[0036] It should be noted that the preparation of the modified particles of wind turbine blades includes the steps of ① crushing the retired wind turbine blades and obtaining the crushed particles; and ② modifying the crushed particles and obtaining the modified particles of wind turbine blades. The modification treatment is to mix the crushed particles with a nitric acid solution with a pH of 2, control the mass ratio of the crushed particles to the nitric acid solution to be 1:6, obtain hydroxylated crushed particles after heating at a controlled temperature of 55°C, and then mix the hydroxylated crushed particles with an acetone solution of maleic anhydride to react, control the mass ratio of the hydroxylated crushed particles to the maleic anhydride in the acetone solution of maleic anhydride to be 1:9, obtain maleic anhydride crushed particles, and finally distribute the maleic anhydride crushed particles in a succinic acid aqueous solution, control the mass ratio of the maleic anhydride crushed particles to the succinic acid in the succinic acid aqueous solution to be 1:4, and control the temperature of the succinic acid aqueous solution to be 60°C and stir for 1h, and finally cool to room temperature, add KH560 and stir for 18h and wash and dry.

[0037] A method for preparing recycled particles from retired wind turbine blades, used for preparing the recycled particles from retired wind turbine blades as described above, including a wind turbine blade crushing and modification particle preparation part and a mixing preparation part. The wind turbine blade crushing and modification particle preparation part is used to prepare the wind turbine blade crushing and modification particles, and the mixing preparation part includes mixing, stirring and shearing the wind turbine blade crushing and modification particles with base asphalt, sodium dodecylbenzene sulfonate and SBS at 180°C to obtain recycled particles from retired wind turbine blades. The wind turbine blade crushing and modification particle preparation part includes the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining crushed and modification particles from wind turbine blades.

[0038] An application of particles recovered from retired wind turbine blades, comprising using the particles recovered from retired wind turbine blades as described above and applying them to road paving.

[0039] Embodiment 4

[0040] The difference between Example 4 and Example 1 is that the auxiliary agent in the retired wind turbine blade recycling particles in Example 4 is a stabilizer, and the added amount of the stabilizer is 4wt% of the total mass.

[0041] Embodiment 5

[0042] The difference between Example 5 and Example 4 is that the auxiliary agent in the particles recovered from retired wind turbine blades in Example 5 is an antioxidant, and the added amount of the antioxidant is 6wt% of the total mass.

[0043] Embodiment 6

[0044] The difference between Example 6 and Example 4 is that the auxiliary agent in the retired wind turbine blade recycling particles in Example 6 is a thickener, and the added amount of the thickener is 8wt% of the total mass.

[0045] Comparative Example 1

[0046] The difference between Comparative Example 1 and Example 1 is that in Comparative Example 1, wind turbine blade crushed particles are used instead of wind turbine blade crushed modified particles.

[0047] Comparative Example 2

[0048] The difference between Comparative Example 2 and Example 1 is that sodium dodecylbenzene sulfonate is not added in Comparative Example 2.

[0049] The following will conduct performance tests on Examples 1 to 3 and Comparative Examples 1 and 2, and the test contents and results are as follows.

[0050] 1. Viscosity and elasticity test: Conduct 60℃ viscosity test and elastic recovery test according to JTG E20-2011 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering";

[0051] 2. Penetration: Penetration test is carried out according to JTG / T 3364-02-2019 Technical Specifications for Highway Roadbed Construction;

[0052] 3. Softening point test: Softening point test is carried out in accordance with JTG / T 3364-02-2019 "Technical Specifications for Highway Roadbed Construction".

[0053] Table 1 Performance test results

[0054]

[0055] It can be seen from Table 1 above that, compared with Comparative Example 1, the 60°C viscosity Pa·s and elastic recovery in Examples 1 to 4 are significantly improved. At the same time, compared with Comparative Example 2, although the viscosity of Example 1 is not higher than that of Comparative Example 2, the elastic recovery is improved to a certain extent. In addition, the needle penetration and softening point of Example 1 are improved to a certain extent, which is because the stability and strength of the overall structure are improved to a certain extent on the basis of adding sodium dodecylbenzene sulfonate.

[0056] In addition, by combining wind turbine blade crushed and modified particles, SBS, sodium dodecylbenzene sulfonate and base asphalt, the dispersibility of SBS, sodium dodecylbenzene sulfonate and wind turbine blade crushed and modified particles in the base asphalt will be improved, and the obtained retired wind turbine blade recycling particles will have high structural stability and provide mechanical support, thereby significantly improving the pressure bearing capacity and strength of the retired wind turbine blade recycling particles under the action of external forces.

[0057] In summary, the present application provides a retired wind turbine blade recycling particle, preparation method and application, wherein the retired wind turbine blade recycling particle is modified by modifying the wind turbine blade crushed particles with poor compatibility with asphalt to obtain wind turbine blade crushed modified particles with high compatibility with asphalt, thereby combining asphalt with wind turbine blade crushed modified particles to form high-strength and lightweight retired wind turbine blade recycling particles, which significantly improves the structural strength of asphalt, thereby extending the service life of asphalt while reducing the density of asphalt and reducing the reuse of retired wind turbine blade recycling particles. The preparation method of the retired wind turbine blade recycling particles has the effects of convenient process and low operating difficulty. The application of the retired wind turbine blade recycling particles has the effects of significantly improving the road paving strength, reducing the difficulty of road paving and extending the service life of the paved road.

[0058] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0059] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0060] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A particle recovery method for retired wind turbine blades, characterized in that: The invention comprises wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS, wherein the wind turbine blade crushed modified particles, base asphalt, sodium dodecylbenzene sulfonate and SBS are mixed in a mass ratio of 18-30:100:1-3:12-16; the wind turbine blade crushed modified particles are obtained by modifying the wind turbine blade crushed particles.

2. The particle recovery method for retired wind turbine blades according to claim 1 is characterized by: The preparation of the wind turbine blade crushed and modified particles comprises the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining the wind turbine blade crushed and modified particles.

3. The particle recovery method for retired wind turbine blades according to claim 2 is characterized in that: In step ②, the modification treatment is to mix the broken particles with a nitric acid solution with a pH of 2, obtain hydroxylated broken particles after heating treatment, and then mix the hydroxylated broken particles with an acetone solution of maleic anhydride to obtain maleic anhydride broken particles, and finally distribute the maleic anhydride broken particles in a succinic acid aqueous solution, control the temperature of the succinic acid aqueous solution to 50-60°C, stir and react for 1-3h, finally cool to room temperature, add KH560, stir and react for 12-18h, and wash and dry.

4. The particle recovery method for retired wind turbine blades according to claim 3 is characterized by: The mass ratio of the crushed particles to the nitric acid solution is 1:4-6.

5. The particle recovery method for retired wind turbine blades according to claim 3 is characterized by: The mass ratio of the hydroxylated crushed particles to the maleic anhydride in the acetone solution of maleic anhydride is 1:6-9.

6. The particle recovery method for retired wind turbine blades according to claim 3 is characterized by: The mass ratio of the maleic anhydride-treated crushed particles to the succinic acid in the succinic acid aqueous solution is 1:3-4.

7. The particle recovery method for retired wind turbine blades according to claim 1 is characterized by: The invention also includes an auxiliary agent, which is at least one of a compatibilizer, a stabilizer, an antioxidant, and a thickener, and the amount of the auxiliary agent added is 4-8wt% of the total mass.

8. A method for preparing particles recovered from retired wind turbine blades, used for preparing particles recovered from retired wind turbine blades as claimed in any one of claims 1 to 7, characterized in that: It includes a wind turbine blade crushed and modified particle preparation part and a mixing preparation part; the wind turbine blade crushed and modified particle preparation part is used to prepare wind turbine blade crushed and modified particles, and the mixing preparation part includes mixing, stirring and shearing the wind turbine blade crushed and modified particles with base asphalt, sodium dodecylbenzene sulfonate and SBS at 180°C to obtain retired wind turbine blade recycled particles.

9. The method for preparing particles recovered from retired wind turbine blades according to claim 8, characterized in that: The preparation part of the wind turbine blade crushed and modified particles includes the steps of ① crushing the retired wind turbine blades and obtaining crushed particles; and ② modifying the crushed particles and obtaining the wind turbine blade crushed and modified particles.

10. An application for recycling particles from retired wind turbine blades, characterized in that: The method comprises recycling particles from retired wind turbine blades as described in any one of claims 1 to 7 and applying the particles to road paving.

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