Method for preparing slurry fuel by using carbon fiber-based wind power blade and slurry fuel

Abstract

The invention relates to a method for preparing slurry fuel by using a carbon fiber-based wind power blade and the slurry fuel, and the method comprises the following steps: cutting and crushing the carbon fiber-based wind power blade to obtain blade powder; the leaf powder is sequentially subjected to salt solution soaking treatment and organic solution swelling treatment, and solid powder is obtained after filtering; mixing and stirring the solid powder, a dispersing agent and water to obtain a slurry material; and heating and stirring the slurry material to obtain the slurry fuel. The carbon fiber-based wind power blade is applied to preparation of the slurry fuel, so that resource utilization of the carbon fiber-based wind power blade is realized, and meanwhile, the preparation approach of the slurry fuel is also expanded. The obtained slurry fuel has high combustion efficiency and high calorific value.

Description

Technical Field

[0001] The present invention relates to the field of fuel technology, and in particular to a method for preparing slurry fuel by utilizing carbon fiber-based wind turbine blades and the slurry fuel. Background Art

[0002] As a clean and renewable energy, wind energy is gaining more and more attention. With the vigorous development of the wind power industry, the demand for wind turbine materials is increasing year by year. Among them, wind turbine blades are the most important components of wind turbine materials. However, wind turbine materials have a service life, and retired wind turbine materials, especially wind turbine blades, face problems such as resource reuse.

[0003] Carbon fiber wind turbine blades are composite materials of carbon fiber and resin, and also contain some core materials and adhesives. The resin, core materials and adhesives are all flammable. The carbon fiber in the carbon fiber wind turbine blades also has certain flammability after proper treatment. If it can be utilized, the subsequent carbon fiber can be further enriched and the resin can be burned after treatment. Improving the combustion efficiency can effectively solve the problem of the disposal of retired wind turbine blades.

[0004] Therefore, how to make full use of the combustible components in the blades and turn them into fuel has become an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing slurry fuel using carbon fiber-based wind turbine blades and slurry fuel. The method can make full use of the combustible components in the blades to prepare them into slurry fuel, which can effectively improve the combustion efficiency of the fuel and realize resource utilization.

[0006] In order to achieve the above object, the present invention provides a method for preparing slurry fuel using carbon fiber-based wind turbine blades, the method comprising: Cutting and crushing the carbon fiber-based wind turbine blades to obtain blade powder; The leaf powder is sequentially subjected to a salt solution soaking treatment and an organic solution swelling treatment, and then filtered to obtain a solid powder; The solid powder, dispersant and water are mixed and stirred to obtain a slurry material; The slurry material is heated and stirred to obtain slurry fuel.

[0007] Optionally, the cutting and crushing is performed by wet ball milling, and the particle size of the leaf powder is ≥100 mesh.

[0008] Optionally, the salt solution contains Cl - The salt solution is preferably a sodium chloride solution; the concentration of the sodium chloride solution is 1.2-1.4 mol / L.

[0009] Optionally, the reaction temperature during the salt solution immersion treatment is 90-140° C., and the reaction time is 60-120 min.

[0010] Optionally, the organic reagent used in the organic solution swelling treatment is one or more of methanol, acetone, chloroform and dichloromethane.

[0011] Optionally, the reaction time of the swelling treatment is 0.3h-24h, and the reaction temperature is 60-200°C.

[0012] Optionally, the liquid-to-solid ratio during the salt solution immersion treatment and the liquid-to-solid ratio during the swelling treatment are each independently not less than 5:1 ml / g.

[0013] Optionally, the dispersant is two or more of sodium methylene bis naphthalene sulfonate, formaldehyde condensate of sodium methyl naphthalene sulfonate, sodium lignin sulfonate, and calcium lignin sulfonate.

[0014] Optionally, the amount of the dispersant is 0.6%-5% of the amount of the solid powder, and the amount of water is 30%-80% of the amount of the solid powder.

[0015] Optionally, the mixing and stirring adopts electric ultrasonic high-speed stirring; the mixing and stirring time is 60-120 minutes, and the stirring speed is 200r / min-1200r / min.

[0016] Optionally, the heating and stirring temperature is 30-150° C., the time is 60-100 min, and the stirring speed is 200 r / min-1200 r / min.

[0017] Another aspect of the present invention provides a slurry fuel prepared by the above method.

[0018] Through the above technical scheme, the present invention soaks the blade powder in a salt solution and swells it with an organic solution, which can make the resin and carbon fiber in the carbon fiber-based wind turbine blades loose and porous, and activate the carbon fiber at the same time, so that both the carbon fiber and the resin become flammable substances, which is convenient for the subsequent fuel to fully contact with oxygen for combustion; then the solid powder, dispersant and water are mixed, stirred and heated to obtain a slurry fuel. The obtained slurry fuel has high combustion efficiency and high calorific value. The present invention applies carbon fiber-based wind turbine blades to the preparation of slurry fuel, which not only realizes the resource utilization of carbon fiber-based wind turbine blades, but also expands the preparation method of slurry fuel.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] In one aspect, the present invention provides a method for preparing slurry fuel using carbon fiber-based wind turbine blades, the method comprising: Cutting and crushing the carbon fiber-based wind turbine blades to obtain blade powder; The leaf powder is sequentially subjected to a salt solution soaking treatment and an organic solution swelling treatment, and then filtered to obtain a solid powder; The solid powder, dispersant and water are mixed and stirred to obtain a slurry material; The slurry material is heated and stirred to obtain slurry fuel.

[0022] According to the present invention, optionally, the carbon fiber-based wind turbine blade contains 55-85wt% of carbon fiber, 10-30wt% of resin and 0.5-15wt% of core material.

[0023] According to the present invention, optionally, the cutting and crushing is performed by wet ball milling, and the time of wet ball milling can be 1-24 hours; the particle size of the leaf powder after wet ball milling is ≥100 mesh.

[0024] According to the present invention, optionally, the salt solution contains Cl - The salt solution is preferably a sodium chloride solution; the concentration of the sodium chloride solution is 1.2-1.4 mol / L.

[0025] According to the present invention, optionally, the reaction temperature during the salt solution soaking treatment is 90-140°C, and the reaction time is 60-120 minutes. Through the salt solution soaking treatment, the corrosion penetration between the blade powder and the salt solution can be promoted, the carbon fiber in the blade can be activated, and the non-combustible carbon fiber can be converted into a combustible component for preparing slurry fuel. At the same time, the pores between the resin and the carbon fiber in the wind turbine blade can be enlarged, making the resin and the carbon fiber looser, which is more convenient for the resin and the carbon fiber to burn.

[0026] According to the present invention, optionally, the organic reagent used in the organic solution swelling treatment is one or more of methanol, acetone, chloroform and dichloromethane.

[0027] According to the present invention, optionally, the reaction time of the swelling treatment is 0.3h-24h, and the reaction temperature is 60-200° C. Through the organic solution swelling treatment, the microscopic specific surface area of ​​the resin can be increased to facilitate penetration and make the resin have more pores, so that the slurry fuel prepared later can better contact with oxygen for combustion, thereby ensuring the full combustion and combustion efficiency of the prepared slurry fuel.

[0028] According to the present invention, optionally, the liquid-solid ratio during the salt solution immersion treatment and the liquid-solid ratio during the swelling treatment are each independently not less than 5:1 ml / g. Through the above embodiment, the high calorific value of the prepared slurry fuel can be further improved and the slurry fuel can be fully burned.

[0029] According to the present invention, optionally, the dispersant is two or more of sodium methylene bis naphthalene sulfonate, formaldehyde condensate of sodium methyl naphthalene sulfonate, sodium lignin sulfonate, and calcium lignin sulfonate.

[0030] According to the present invention, optionally, the amount of the dispersant is 0.6%-5% of the amount of the solid powder, and the amount of water is 30%-80% of the amount of the solid powder. Through the above embodiment, the dispersant can ensure the dispersibility of the slurry fuel, so that the slurry fuel is not stratified and maintains uniformity.

[0031] According to the present invention, optionally, the mixing and stirring can adopt electric ultrasonic high-speed stirring; the mixing and stirring time is 60-120min, and the stirring speed is 200r / min-1200r / min.

[0032] According to the present invention, optionally, the heating and stirring temperature is 30-150°C, the time is 60-100 min, and the stirring speed is 200r / min-1200r / min. Through the above embodiment, the slurry material can be mixed evenly and the slurry fuel can be kept with a better apparent viscosity.

[0033] Another aspect of the present invention provides a slurry fuel prepared by the above method.

[0034] Through the above technical scheme, the present invention soaks the blade powder in a salt solution and swells it with an organic solution, which can make the resin and carbon fiber in the carbon fiber-based wind turbine blades loose and porous, and activate the carbon fiber at the same time, so that both the carbon fiber and the resin become flammable substances, which is convenient for the subsequent fuel to fully contact with oxygen for combustion; then the solid powder, dispersant and water are mixed, stirred and heated to obtain a slurry fuel. The obtained slurry fuel has high combustion efficiency and high calorific value. The present invention applies carbon fiber-based wind turbine blades to the preparation of slurry fuel, which not only realizes the resource utilization of carbon fiber-based wind turbine blades, but also expands the preparation method of slurry fuel.

[0035] The present invention is further illustrated by the following examples, but the present invention is not limited thereto.

[0036] Example 1 A method for preparing slurry fuel using carbon fiber-based wind turbine blades comprises: The waste carbon fiber-based wind turbine blades are cut and crushed to 100 meshes by wet ball milling with ethanol to obtain blade powder; the blade powder is immersed in a sodium chloride solution for reaction, the solution concentration is 1.2 mol / L, the liquid-solid ratio is 10 mL: 1 g, the reaction temperature is 110°C, the reaction time is 90 min, and after the reaction is completed, it is swollen in a methanol solution, the reaction temperature is 90°C, the reaction time is 1 h, the liquid-solid ratio is 10 mL: 1 g, and after the reaction is completed, it is filtered to obtain solid powder; The solid powder, sodium methylene bisnaphthalene sulfonate, calcium lignin sulfonate and water were mixed and ultrasonically stirred for 90 minutes at a stirring speed of 800 r / min, and then heated and stirred at 90°C for 60 minutes to obtain a slurry fuel; wherein the amount of sodium methylene bisnaphthalene sulfonate and calcium lignin sulfonate was 1% of the amount of solid powder, and the amount of water added was 65% of the amount of solid powder.

[0037] Example 2 A method for preparing slurry fuel using carbon fiber-based wind turbine blades comprises: The waste carbon fiber-based wind turbine blades were cut and crushed to 100 meshes by wet ball milling with ethanol to obtain blade powder; the blade powder was immersed in a sodium chloride solution for reaction, the solution concentration was 1.2 mol / L, the liquid-solid ratio was 10 mL:1 g, the reaction temperature was 120°C, the reaction time was 100 min, and after the reaction was completed, it was swollen in a methanol solution, the reaction temperature was 90°C, the reaction time was 1 h, the liquid-solid ratio was 10 mL:1 g, and after the reaction was completed, it was filtered to obtain solid powder; Solid powder, sodium methylene bisnaphthalene sulfonate, calcium lignin sulfonate and water were mixed and ultrasonically stirred for 90 minutes at a stirring speed of 600 r / min, and then heated and stirred at 100°C for 90 minutes to obtain a slurry fuel; wherein the amount of sodium methylene bisnaphthalene sulfonate and calcium lignin sulfonate was 1.2% of the amount of solid powder, and the amount of water added was 70% of the amount of solid powder.

[0038] Example 3 A method for preparing slurry fuel using carbon fiber-based wind turbine blades comprises: The waste carbon fiber-based wind turbine blades are cut and crushed to 100 meshes by wet ball milling with ethanol to obtain blade powder; the blade powder is immersed in a sodium chloride solution for reaction, the solution concentration is 1.4 mol / L, the liquid-solid ratio is 10 mL: 1 g, the reaction temperature is 140°C, the reaction time is 90 min, and after the reaction is completed, it is swollen in a methanol solution, the reaction temperature is 90°C, the reaction time is 1 h, the liquid-solid ratio is 10 mL: 1 g, and after the reaction is completed, it is filtered to obtain solid powder; The solid powder, sodium methylene bisnaphthalene sulfonate, formaldehyde condensate of sodium methylnaphthalene sulfonate and water were mixed and ultrasonically stirred for 90 minutes at a stirring speed of 900 r / min, and then heated and stirred at 110°C for 100 minutes to obtain a slurry fuel; wherein the amount of formaldehyde condensate of sodium methylene bisnaphthalene sulfonate and sodium methylnaphthalene sulfonate was 1.5% of the amount of solid powder, and the amount of water added was 72% of the amount of solid powder.

[0039] Comparative Example 1 The method for preparing slurry fuel using carbon fiber-based wind turbine blades in this comparative example is the same as that in Example 1, except that the blade powder is not subjected to organic solution swelling treatment.

[0040] Comparative Example 2 The method for preparing slurry fuel using carbon fiber-based wind turbine blades in this comparative example is the same as that in Example 1, except that no dispersant is added to the slurry material.

[0041] Comparative Example 3 The method for preparing slurry fuel using carbon fiber-based wind turbine blades in this comparative example is the same as that in Example 1, except that the waste carbon fiber-based wind turbine blades are cut and crushed into 40-100 meshes.

[0042] Test Case The slurry fuels of the examples and comparative examples were tested for apparent viscosity and high calorific value performance. The apparent viscosity was tested in accordance with the provisions of GB / T 18856.2-2008; the high calorific value was measured using an oxygen bomb calorimeter (model ZDHW-5E), and each sample was measured three times, and the average value of the three experiments was taken as the measurement data. The results are shown in Table 1.

[0043] Table 1.

[0044]

[0045] It can be seen from Table 1 that the slurry fuel prepared by using carbon fiber-based wind turbine blades in the present invention has a higher calorific value, better apparent viscosity and dispersibility.

[0046] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0048] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A method for preparing slurry fuel using carbon fiber-based wind turbine blades, characterized in that: The method includes: Cutting and crushing the carbon fiber-based wind turbine blades to obtain blade powder; The leaf powder is sequentially subjected to a salt solution soaking treatment and an organic solution swelling treatment, and then filtered to obtain a solid powder; The solid powder, dispersant and water are mixed and stirred to obtain a slurry material; The slurry material is heated and stirred to obtain slurry fuel.

2. The method according to claim 1, wherein: The cutting and pulverizing is performed by wet ball milling, and the particle size of the leaf powder is ≥100 meshes.

3. The method according to claim 1, wherein: The salt solution contains Cl - A salt solution, preferably a sodium chloride solution; the concentration of the sodium chloride solution is 1.2-1.4 mol / L; The reaction temperature during the salt solution immersion treatment is 90-140° C., and the reaction time is 60-120 min.

4. The method according to claim 1, wherein: The organic reagent used in the organic solution swelling treatment is one or more of methanol, acetone, chloroform and dichloromethane; The reaction time of the swelling treatment is 0.3h-24h, and the reaction temperature is 60-200°C.

5. The method according to claim 1, wherein: The liquid-to-solid ratio during the salt solution immersion treatment and the liquid-to-solid ratio during the swelling treatment are each independently not less than 5:1 ml / g.

6. The method according to claim 1, wherein: The dispersant is two or more of sodium methylene bis naphthalene sulfonate, formaldehyde condensate of sodium methyl naphthalene sulfonate, sodium lignin sulfonate and calcium lignin sulfonate.

7. The method according to claim 1, wherein: The amount of the dispersant used is 0.6%-5% of the amount of the solid powder used, and the amount of water used is 30%-80% of the amount of the solid powder used.

8. The method according to claim 1, wherein: The mixing and stirring time is 60-120 min, and the stirring speed is 200 r / min-1200 r / min.

9. The method according to claim 1, wherein: The heating and stirring temperature is 30-150° C., the time is 60-100 min, and the stirring speed is 200 r / min-1200 r / min.

10. A slurry fuel prepared according to the method according to any one of claims 1 to 9.

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