CN117019845B - Method for collecting glass fiber reinforced plastic and core material from waste wind power blade - Google Patents
Method for collecting glass fiber reinforced plastic and core material from waste wind power blade Download PDFInfo
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- CN117019845B CN117019845B CN202311291466.7A CN202311291466A CN117019845B CN 117019845 B CN117019845 B CN 117019845B CN 202311291466 A CN202311291466 A CN 202311291466A CN 117019845 B CN117019845 B CN 117019845B
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- 239000011162 core material Substances 0.000 title claims abstract description 101
- 239000002699 waste material Substances 0.000 title claims abstract description 98
- 239000011152 fibreglass Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 50
- 150000003841 chloride salts Chemical class 0.000 claims abstract description 30
- 239000003960 organic solvent Substances 0.000 claims abstract description 30
- 239000012266 salt solution Substances 0.000 claims abstract description 22
- 238000002791 soaking Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 208000034699 Vitreous floaters Diseases 0.000 claims abstract description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 16
- 229920002545 silicone oil Polymers 0.000 claims description 15
- 239000011780 sodium chloride Substances 0.000 claims description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000011197 physicochemical method Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000007667 floating Methods 0.000 description 33
- 238000001914 filtration Methods 0.000 description 21
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 18
- 239000000463 material Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000010907 mechanical stirring Methods 0.000 description 10
- 238000005406 washing Methods 0.000 description 10
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 9
- 238000001035 drying Methods 0.000 description 8
- -1 polyethylene terephthalate Polymers 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 240000007182 Ochroma pyramidale Species 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical compound C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
Abstract
The invention relates to the field of recovery treatment of waste wind power blades, and discloses a method for collecting glass fiber reinforced plastic and a core material from waste wind power blades. The method comprises the following steps: and (3) placing a plurality of blocky waste wind power blades containing core materials into a chloride salt solution for reaction, then carrying out solid-liquid separation, placing the obtained solid into an organic solvent for soaking, then heating under the condition of stirring, and then respectively collecting a bottom product and floaters. The method can effectively break the bonding effect of the glass fiber reinforced plastic and the core material through a physicochemical method, separate the glass fiber reinforced plastic and the core material in the blade, and obtain the glass fiber reinforced plastic and the core material with larger size.
Description
Technical Field
The invention relates to the field of recovery treatment of waste wind power blades, in particular to a method for collecting glass fiber reinforced plastic and core materials from waste wind power blades.
Background
Wind power generation is an important low-carbon power generation mode, development is rapid in years, and the wind power generation ratio is not rising year by year. However, wind power generation can be retired after a period of operation, and the waste blades after retirement occupy a large area, and face a series of disposal problems.
The wind power blade is mainly made of composite materials (glass fiber reinforced plastics) composed of fibers, resin and the like, the composite materials are recycled and widely applied to the fields of building materials, composite boards and the like, a large number of core materials are arranged at the positions of webs and the like besides the composite materials, the core materials of the blade mainly comprise balsa wood, PVC (polyvinyl chloride) and PET (polyethylene terephthalate), the core materials are light, and the wind power blade is partly imported abroad, so that the wind power blade has higher value and can be applied to the interlayer weight reduction effect of other products. While blade composites containing core materials may have a greater impact on subsequent machine utilization. The blade core material is bonded with the composite material through the adhesive, and compared with the internal bonding of the composite material, the bonding is loose, if the core material wood and the glass fiber reinforced plastic in the blade can be effectively peeled off respectively, the subsequent independent utilization can be realized, and the utilization value of the blade can be greatly improved.
The existing method for separating the glass fiber reinforced plastic and the core material is mainly to recover the crushed blades, and the obtained core material and the glass fiber reinforced plastic are all powder, so that the application range of the method is definitely reduced, because the glass fiber reinforced plastic is undersized, the properties of the glass fiber reinforced plastic are definitely reduced, the core material and other substances are light materials, the larger size of the core material can be widely applied to various weight reduction fields to reduce the whole weight, and if the core material exists in a powder form, the adhesion is difficult, and the subsequent application is affected.
Disclosure of Invention
The invention aims to solve the problem that the comprehensive utilization of glass fiber reinforced plastic is affected by the existence of a core material, and the problem that an effective method for stripping and recycling the core material and the glass fiber reinforced plastic respectively in a relatively complete size does not exist at present.
In order to achieve the above object, the present invention provides a method for collecting glass fiber reinforced plastics and core materials from waste wind power blades, the method comprising the steps of: and (3) placing a plurality of blocky waste wind power blades containing core materials into a chloride salt solution for reaction, then carrying out solid-liquid separation, placing the obtained solid into an organic solvent for soaking, then heating under the condition of stirring, and then respectively collecting a bottom product and floaters.
Preferably, the chloride salt is sodium chloride and/or potassium chloride.
Preferably, the concentration of the chloride salt solution is more than or equal to 2mol/L.
Preferably, the concentration of the chloride salt solution is 2-6mol/L.
Preferably, the reaction conditions include: the temperature is 60-90 ℃ and the time is more than or equal to 2 hours.
Preferably, the reaction time is 4-20 hours.
Preferably, the liquid-solid ratio of the consumption of the chloride salt solution to the consumption of the blocky waste wind power blade containing the core material is more than or equal to 5mL/g.
Preferably, the liquid-solid ratio of the using amount of the chloride salt solution to the using amount of the block-shaped waste wind power blade containing the core material is 10-40mL/g.
Preferably, the liquid-solid ratio of the dosage of the organic solvent to the dosage of the massive waste wind power blade containing the core material is more than or equal to 20mL/g.
Preferably, the liquid-solid ratio of the dosage of the organic solvent to the massive waste wind power blade containing the core material is 20-40mL/g.
Preferably, the organic solvent is silicone oil.
Preferably, the soaking temperature is 100-160 ℃.
Preferably, the soaking temperature is 120-140 ℃.
Preferably, the soaking time is 4-48 hours.
Preferably, the soaking time is 8-24 hours.
Preferably, the heating temperature is 100-140 ℃, and the heating time is 4-10h.
The method can effectively separate the glass fiber reinforced plastic from the core material in the wind power blade, and the obtained glass fiber reinforced plastic and core material have certain sizes and do not exist in the form of powder, so that the application fields of the wind power blade are greatly expanded, and the subsequent resource utilization is respectively carried out.
The method can effectively break the bonding effect of the glass fiber reinforced plastic and the core material through a physicochemical method, separate the glass fiber reinforced plastic and the core material in the blade, obtain the glass fiber reinforced plastic and the core material with larger size, further utilize or prepare the glass fiber, effectively improve the application field of the glass fiber reinforced plastic, directly apply the obtained core material with larger size in the middle of various weight-reducing materials, and have less core material content in the separated glass fiber reinforced plastic, the core material content in the glass fiber reinforced plastic is less than or equal to 0.05 weight percent, the glass fiber reinforced plastic content in the core material is less than or equal to 0.5 weight percent, and the separation effect is good.
Drawings
FIG. 1 is a schematic view of the cutting of a waste wind blade according to the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The invention provides a method for separating balsa wood from waste wind power blades, which comprises the following steps: and (3) placing a plurality of blocky waste wind power blades containing core materials into a chloride salt solution for reaction, then carrying out solid-liquid separation, placing the obtained solid into an organic solvent for soaking, then heating under the condition of stirring, and then respectively collecting a bottom product and floaters.
The source of the waste wind power blade is a blade which cannot be used in a wind power plant due to retirement or accidents, the content of the glass fiber reinforced plastic in the waste wind power blade is 80-98 wt%, and the content of the core material is 2-20 wt%.
In general, only part of the wind power blade contains a core material, such as the front edge of the blade, so that in order to save cost, in a preferred case, the waste wind power blade is cut into blocks according to the design and existence of the blade and through manual observation and identification, the block waste wind power blade is obtained, then a plurality of blocks waste wind power blades containing the core material are taken and placed in a chloride salt solution for reaction, then solid-liquid separation is carried out, the obtained solid is placed in an organic solvent for soaking, then heating is carried out under the condition of stirring, and then a bottom product and floating matters are respectively collected.
In the present invention, there is no special requirement on the cutting mode, and the cutting mode can be transverse and longitudinal cutting, and in a specific embodiment, the cutting mode can be shown in fig. 1.
In order to ensure that the subsequent reaction and the soaking operation have better effects, in the preferred case, after the waste wind power blades are cut, the length of each block-shaped waste wind power blade containing the core material is controlled to be 3-5cm, the width is controlled to be 3-5cm, and the height is the same as the thickness of the waste wind power blade.
In a preferred aspect of the invention, the chloride salt is sodium chloride and/or potassium chloride.
Preferably, the concentration of the chloride salt solution is more than or equal to 2mol/L, more preferably 2-6mol/L, and particularly can be 2mol/L, 3mol/L, 4mol/L, 5mol/L or 6mol/L.
In a preferred aspect of the present invention, the reaction conditions include: the temperature is 60-90 ℃, the time is more than or equal to 2 hours, and further preferably, the reaction time is 4-20 hours.
In particular embodiments, the temperature of the reaction may be 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, or 90 ℃ and the time of the reaction may be 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 14 hours, 16 hours, 18 hours, or 20 hours.
In the preferred embodiment of the present invention, the liquid-solid ratio of the amount of the chloride salt solution to the amount of the core-containing block-shaped waste wind turbine blade is not less than 5mL/g, more preferably 10 to 40mL/g, and specifically 10mL/g, 15mL/g, 20mL/g, 25mL/g, 30mL/g, 35mL/g or 40mL/g may be used.
In the invention, the liquid-solid ratio of the amount of the chloride salt solution to the amount of the block-shaped waste wind power blade containing the core material refers to the liquid-solid ratio of the amount of the chloride salt solution to the total amount of the block-shaped waste wind power blade containing the core material which is reacted in the chloride salt solution.
In the preferred embodiment of the present invention, the liquid-solid ratio of the amount of the organic solvent to the amount of the core-containing block-shaped waste wind turbine blade is not less than 20mL/g, and further is 20 to 40mL/g, specifically 20mL/g, 22mL/g, 24mL/g, 26mL/g, 28mL/g, 30mL/g, 32mL/g, 34mL/g, 36mL/g, 38mL/g or 40mL/g.
In the present invention, the liquid-solid ratio of the amount of the organic solvent to the amount of the core-containing block-shaped waste wind turbine blade is the liquid-solid ratio of the amount of the organic solvent to the total amount of the core-containing block-shaped waste wind turbine blade reacted in the chloride salt solution.
In a preferred embodiment of the present invention, the organic solvent is a silicone oil (silicone product), and in a specific embodiment, the silicone oil may be specifically selected from one or more of a methyl silicone oil, an ethyl silicone oil, a phenyl silicone oil, a methyl hydrogen-containing silicone oil, a methylphenyl silicone oil, a methyl chlorophenyl silicone oil, a methylethoxy silicone oil, a methyltrifluoropropyl silicone oil, a methyl vinyl silicone oil, a methyl hydroxy silicone oil, an ethyl hydrogen-containing silicone oil, a hydroxy hydrogen-containing silicone oil, and a cyano-containing silicone oil.
Preferably, the soaking temperature is 100-160deg.C, further 120-140deg.C, and specifically 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C or 140 deg.C.
Preferably, the soaking time is 4-48h, further 8-24h, and specifically can be 8h, 9h, 10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 21h, 22h, 23h or 24h.
In the invention, after soaking, the core material in the waste wind power blade can be softened, and then mechanical stirring is carried out, so that the core material and the glass fiber reinforced plastic can be further separated.
The heating temperature is preferably 100-140 ℃, and may specifically be 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 135 ℃ or 140 ℃.
In the heating process, under the stirring effect, the core material in the waste wind power blade can gradually fall off and float on the liquid surface, so that no special requirement is made on the stirring speed, and the core material can fully fall off.
In a preferred embodiment, the heating time is 4-10h, and may be specifically 4h, 5h, 6h, 7h, 8h, 9h or 10h.
Because the separated core material floats on the liquid surface, the floating objects are the separated core materials, and the product obtained after the core material is separated is sunk at the bottom, namely glass fiber reinforced plastic, so after heating is finished, the bottom product and the floating objects are required to be respectively collected, then acetone, ethanol and water are sequentially adopted to respectively wash the collected floating objects and the collected bottom product, and then drying is carried out.
In the present invention, the temperature of the drying is 80 to 110 ℃, preferably 80 to 90 ℃, and may be specifically 80 ℃,82 ℃,84 ℃,86 ℃,88 ℃ or 90 ℃.
In the present invention, the drying time is > 30min, preferably 60-120min.
In a specific embodiment of the present invention, the drying time may be 60min, 65min, 70min, 75min, 80min, 85min, 90min, 95min, 100min, 105min, 110min, 115min or 120min.
The present invention will be described in detail by way of examples, but the scope of the present invention is not limited thereto.
In the following examples, the waste wind power blade used was a wind power blade which was retired for twenty years from Liaoning wind power plant of the Dragon source electric power plant, and the core material content of the waste wind power blade was 8.09 wt% and the glass fiber reinforced plastic content was 91.91 wt%.
Example 1
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, 261 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blades) are all placed in 5mol/L chloride salt (sodium chloride) solution for reaction (the liquid-solid ratio of the consumption of the chloride salt solution to the total consumption of 261 block-shaped waste wind power blades containing core materials is 15 mL/g), and the reaction conditions comprise: the temperature is 80 ℃, the time is 8 hours, then filtration is carried out, the obtained solid is placed in an organic solvent (methyl silicone oil) (the liquid-solid ratio of the using amount of the organic solvent to the total using amount of 261 blocky waste wind power blades containing core materials is 30 mL/g), the obtained solid is soaked for 12 hours at 140 ℃, then the obtained solid is heated for 6 hours at 130 ℃ under the condition of mechanical stirring, then the floating matters are salvaged, then filtration is carried out, the solid obtained by filtration, namely the bottom product, the obtained floating matters and the bottom product are respectively washed by acetone, ethanol and water in sequence, and the obtained floating matters and the bottom product are dried for 2 hours at 80 ℃ after the washing is completed.
Example 2
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, then 321 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing the core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blade) are all placed in a chloride salt (sodium chloride) solution with the concentration of 6mol/L for reaction (the liquid-solid ratio of the using amount of the chloride salt solution to the total using amount of 321 block-shaped waste wind power blades containing the core materials is 20 mL/g), and the reaction conditions comprise: the temperature is 90 ℃ for 6 hours, then filtration is carried out, the obtained solid is placed in an organic solvent (methyl silicone oil) (the liquid-solid ratio of the using amount of the organic solvent to the total using amount of 321 blocky waste wind power blades containing core materials is 25 mL/g), the obtained solid is soaked for 20 hours at 140 ℃, then the obtained solid is heated for 8 hours at 130 ℃ under the condition of mechanical stirring, then the floating matters are salvaged, then filtration is carried out, the solid obtained by filtration, namely the bottom product is collected, the obtained floating matters and the bottom product are respectively washed by acetone, ethanol and water in sequence, and the obtained floating matters and the bottom product are dried for 2 hours at 90 ℃ after the washing is completed.
Example 3
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, then 286 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing the core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blade) are all placed in a chloride salt (sodium chloride) solution with the concentration of 4mol/L for reaction (the liquid-solid ratio of the using amount of the chloride salt solution to the total using amount of the 286 block-shaped waste wind power blades containing the core materials is 20 mL/g), and the reaction conditions comprise: the temperature is 90 ℃ for 8 hours, then filtration is carried out, the obtained solid is placed in an organic solvent (methyl silicone oil) (the liquid-solid ratio of the using amount of the organic solvent to the total using amount of 286 blocky waste wind power blades containing core materials is 30 mL/g), the obtained solid is soaked for 20 hours at 140 ℃, then the obtained solid is heated for 8 hours at 130 ℃ under the condition of mechanical stirring, then the floating matters are salvaged, then filtration is carried out, the solid obtained by filtration, namely the bottom product is collected, the obtained floating matters and the bottom product are respectively washed by acetone, ethanol and water in sequence, and the obtained floating matters and the bottom product are dried for 2 hours at 90 ℃ after the washing is completed.
Example 4
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, then 324 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing the core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blade) are all placed in 3mol/L chloride salt (sodium chloride) solution for reaction (the liquid-solid ratio of the using amount of the chloride salt solution to the total using amount of 324 block-shaped waste wind power blades containing the core materials is 20 mL/g), and the reaction conditions comprise: the temperature is 90 ℃ for 8 hours, then filtration is carried out, the obtained solid is placed in an organic solvent (methyl silicone oil) (the liquid-solid ratio of the using amount of the organic solvent to the total using amount of 324 blocky waste wind power blades containing core materials is 25 mL/g), the obtained solid is soaked for 20 hours at 130 ℃, then the obtained solid is heated for 8 hours at 130 ℃ under the condition of mechanical stirring, then the floating matters are salvaged, then filtration is carried out, the solid obtained by filtration, namely the bottom product is collected, the obtained floating matters and the bottom product are respectively washed by acetone, ethanol and water in sequence, and the obtained floating matters and the bottom product are dried for 2 hours at 90 ℃ after the washing is completed.
Comparative example 1
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, 321 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blades) are all soaked in water (the liquid-solid ratio of the using amount of water to the total using amount of 321 block-shaped waste wind power blades containing core materials is 20 mL/g), and the soaking conditions comprise: the temperature was 90℃for 12 hours, followed by heating at 80℃for 10 hours with mechanical stirring, at which time no floats were produced.
Comparative example 2
Cutting the waste wind power blades transversely and longitudinally into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, then placing 333 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing core materials has the length of 3-5cm and the width of 3-5cm and the height of the same as the thickness of the waste wind power blades) into organic solvents (methyl silicone oil), soaking the organic solvents for 12h at 80 ℃, then heating the waste wind power blades for 8h at 70 ℃ under the condition of mechanical stirring, wherein no floating matters are generated, continuing to heat the waste wind power blades for 20h, generating a small amount of floating matters, then fishing the floating matters, filtering, collecting the solid obtained by filtering, namely a bottom product, washing the obtained floating matters and the bottom product with acetone, ethanol and water respectively in sequence, and drying the obtained floating matters and the bottom product at 90 ℃ for 2h after washing.
Comparative example 3
The method comprises the steps of transversely and longitudinally cutting the waste wind power blades into blocks according to a cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, then putting 325 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blades) into organic solvents (methyl silicone oil), soaking the organic solvents for 12h at 220 ℃, heating the materials for 8h under the condition of mechanical stirring, at the moment, enabling floating materials and bottom products to be black, fishing the floating materials, filtering, collecting solid obtained by filtering, namely bottom products, washing the obtained floating materials and the bottom products with acetone, ethanol and water in sequence, and drying the obtained floating materials and the bottom products at 90 ℃ for 2h after washing.
Comparative example 4
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in the figure 1 to obtain block-shaped waste wind power blades, then 279 blocks of waste wind power blades containing core materials (each block of waste wind power blades containing core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blades) are all placed in organic solvents (methyl silicone oil), the liquid-solid ratio of the using amount of the organic solvents to the total using amount of the 279 blocks of waste wind power blades containing core materials is 30mL/g, the waste wind power blades are soaked for 12h at 140 ℃, then are heated for 6h at 130 ℃ under the condition of mechanical stirring, then the floats are fished out, filtering is carried out, the solid obtained after filtering, namely, the bottom product is collected, the obtained floats and the bottom product are respectively washed by acetone, ethanol and water in sequence, and the drying is carried out at 80 ℃ for 2h after the washing is completed.
Comparative example 5
The waste wind power blades are transversely and longitudinally cut into blocks according to the cutting mode shown in fig. 1 to obtain block-shaped waste wind power blades, 132 block-shaped waste wind power blades containing core materials (each block-shaped waste wind power blade containing core materials has the length of 3-5cm, the width of 3-5cm and the height of the same as the thickness of the waste wind power blades) are all crushed into powder to obtain crushed materials, all the crushed materials are placed into 5mol/L chloride salt (sodium chloride) solution for reaction (the liquid-solid ratio of the using amount of the chloride salt solution to the total using amount of the crushed materials is 15 mL/g), and the reaction conditions comprise: the temperature is 80 ℃, the time is 8 hours, then filtration is carried out, the obtained solid is placed in an organic solvent (methyl silicone oil) (the liquid-solid ratio of the using amount of the organic solvent to the total using amount of the crushed materials is 30 mL/g), the mixture is soaked for 12 hours at 140 ℃, then the mixture is heated for 6 hours at 130 ℃ under the condition of mechanical stirring, then the floating matters are salvaged, then filtration is carried out, the solid obtained by filtration, namely, the bottom product is collected, the obtained floating matters and the bottom product are respectively washed by acetone, ethanol and water in sequence, and the drying is carried out at 80 ℃ for 2 hours after the washing is completed.
Test example 1
In examples 1 to 4 and comparative examples 2 to 5, the content of the core material in the used block-shaped waste wind power blade containing the core material, the content of the glass fiber reinforced plastic in the dried float, the content of the core material in the dried bottom product, the size and appearance color of the dried float, and the size and appearance color of the dried bottom product were measured, respectively.
Because the glass fiber reinforced plastic and the core material are obviously different, the method for testing the content of the glass fiber reinforced plastic in the dried floating object comprises the following steps: weighing the dried floating matters, namely M1, manually scraping the glass fiber reinforced plastic from the floating matters, weighing the floating matters, namely M1, wherein the content of the glass fiber reinforced plastic in the dried floating matters is M1/M1 x 100 percent; the method for testing the content of the core material in the dried bottom product comprises the following steps: and weighing the dried floating objects, namely M2, manually scraping off the core materials, weighing, namely M2, and enabling the content of the core materials in the dried bottom product to be M2/M2 x 100%.
The results are shown in Table 1.
TABLE 1
As can be seen from the results in Table 1, the method of the present invention can effectively break the bonding effect of the glass fiber reinforced plastic and the core material by the physicochemical method, separate the glass fiber reinforced plastic and the core material in the blade, and obtain the glass fiber reinforced plastic and the core material with larger size, and further utilize or prepare the glass fiber, effectively improve the application field of the glass fiber, directly apply the obtained core material with larger size in the middle of various weight reduction materials, and have less core material content in the glass fiber reinforced plastic, less than 0.05 wt% of core material content in the glass fiber reinforced plastic and less than 0.5 wt% of core material content in the glass fiber reinforced plastic.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (4)
1. A method of collecting glass fiber reinforced plastic and core materials from waste wind power blades, the method comprising the steps of: placing a plurality of blocky waste wind power blades containing core materials into a chloride salt solution for reaction, then carrying out solid-liquid separation, placing the obtained solid into an organic solvent for soaking, then heating under the condition of stirring, and then respectively collecting a bottom product and floaters;
the concentration of the chloride salt solution is 2-6mol/L;
the reaction conditions include: the temperature is 60-90 ℃ and the time is 4-20h;
the organic solvent is silicone oil;
the soaking temperature is 100-160 ℃, and the soaking time is 4-48h;
the heating temperature is 100-140 ℃, and the heating time is 4-10h.
2. The method according to claim 1, wherein the chloride salt is sodium chloride and/or potassium chloride.
3. The method according to claim 1, wherein the liquid-solid ratio of the amount of the chloride salt solution to the amount of the core-containing massive waste wind power blade is not less than 5mL/g.
4. The method according to claim 1, wherein the liquid-solid ratio of the amount of the organic solvent to the amount of the core-containing block-shaped waste wind power blade is not less than 20mL/g.
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| CN116274253A (en) * | 2023-05-17 | 2023-06-23 | 国能龙源环保有限公司 | Method for recycling waste wind power blades |
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| US11746036B2 (en) * | 2018-11-05 | 2023-09-05 | University Of Tennessee Research Foundation | Molten salt assisted pyrolysis recycling of glass fiber reinforced polymer composites |
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| CN101407596A (en) * | 2008-09-25 | 2009-04-15 | 上海第二工业大学 | Method for recycling epoxy resins and glass fibre from non-metal powder of waste printed circuit board |
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