CN114634653A - Method for directionally depolymerizing and recycling retired fan blades - Google Patents
Method for directionally depolymerizing and recycling retired fan blades Download PDFInfo
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- CN114634653A CN114634653A CN202111549070.9A CN202111549070A CN114634653A CN 114634653 A CN114634653 A CN 114634653A CN 202111549070 A CN202111549070 A CN 202111549070A CN 114634653 A CN114634653 A CN 114634653A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/26—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing carboxylic acid groups, their anhydrides or esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/16—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention discloses a method for directionally depolymerizing and recycling retired fan blades, which comprises the following steps: (1) pretreatment of leaves: crushing and drying the retired fan blade; (2) catalytic depolymerization: sending the pretreated retired fan blade into a depolymerization device, adding a degradation liquid with catalytic oxidation property and a catalyst, carrying out oil bath heating at normal pressure, carrying out depolymerization treatment at 80-120 ℃ for 9-12 h, and separating to obtain a fiber material and a degradation residual liquid; (3) falling film recovery: sending the degradation residual liquid obtained in the step (2) into a falling film evaporator for recycling the degradation liquid, and simultaneously obtaining residual liquid sedimentation; (4) and (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), performing centrifugal separation to obtain centrifugal solid and waste liquid, and drying the obtained centrifugal solid to obtain the degradation resin. The invention can efficiently treat the retired fan blade and recover fiber materials, resin and other resources in the retired fan blade.
Description
Technical Field
The invention relates to a treatment method of a retired fan blade, in particular to a directional depolymerization recovery method of a retired fan blade.
Background
The fan blade is one of the core components of the wind driven generator, has the excellent characteristics of low weight, high strength, corrosion resistance, fatigue resistance and the like, and can account for the weight of the whole fan blade to be up to 90 percent. At present, the fan blade is made of a thermosetting resin-based composite material reinforced by glass fiber, carbon fiber or a mixture, and contains a small amount of components such as epoxy structural adhesive, polypropylene oxide paint and the like. The wind energy utilization rate can be increased by about 12% when the diameter of the fan blade is increased by 6%, and the usage amount and the scrappage amount of the resin-based glass fiber composite material are rapidly increased along with the increase of the installed capacity of a single wind driven generator. Currently, wind turbines require the use of approximately 1015 tons of fan blade material per megawatt of rated power. The common design life of a fan blade is about 20 years, and the actual service life of most blades in China is about 15 years. After the peak period of rapid development of wind power generation, a large number of fan blades will be out of service or replaced by maintenance due to damage, aging. The number of the retired fan blades in China in 2018 is about 5700 tons, 5.9 ten thousand tons of retired fan blades are expected to be generated by 2022, and the number is doubled within 5-8 years according to installed capacity prediction. Based on more and more fan blade life termination and attention to resource conservation and environmental protection, the realization of the innocent treatment of retired fan blades through a resource utilization mode forms consensus, and the wind energy becomes real 'clean energy' through realizing the green closed loop circulation development of the whole process of production, use and recovery of the fan blades.
At present, the recycling of retired fan blades in China is still in a starting stage, and related research work is just started. The research results of the treatment and recycling of the retired fan blade mainly adopt a physical recycling method, the disassembled retired fan blade is made into resin-based glass fiber composite material powder by a mechanical cutting and crushing method (patent 201520292707.4), and the resin-based glass fiber composite material powder is used as a filling material to be applied to the fields of building materials, road pavement construction, cement building materials, gypsum building materials and the like, so that the recycling industrialization is formed (patent 201610871475.9, patent 202010067277.1 and patent 20201010067446.1). The method has the advantages of simple mechanical mechanism and low operation cost, can realize large-scale harmless treatment and 100% resource utilization of the retired fan blade, still belongs to degraded use of materials, reduces the resource and economy of the retired fan blade material, has relatively low regeneration technology content, and has low added value of regenerated products. Pyrolysis is a new technology for treating and recycling retired fan blades which is mainly researched and developed currently, and a plurality of sets of special equipment based on a fluidized bed pyrolysis furnace system and a rotary kiln system are developed (patent CN202110255177.6, patent CN202110574097.7, patent CN202110572601.X, patent CN 202110256548.2). The pyrolysis method has the characteristics of small secondary pollution and high resource recovery rate, but needs to consume a large amount of energy, has higher requirements on treatment equipment, has wide application prospect, and needs to be further explored in the aspects of catalyst development and selection, equipment development, process optimization, product resource utilization and the like. The method has the advantages of simple process, high recovery rate, low temperature and normal pressure, small damage to fiber materials and the like.
Therefore, in order to efficiently treat the retired fan blade and recover the fiber materials, the resin and other resources therein, and simultaneously solve the problems of complex process flow, serious resource waste, serious secondary pollution and the like of the current treatment technology, a retired fan blade recovery treatment method based on the directional depolymerization technology needs to be developed based on the pyrolysis characteristic of the resin.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for directionally depolymerizing and recycling the blades of the retired fan, which solves the problems of serious secondary pollution, low resource recycling rate, low added value of recycled products, degraded utilization of resources and the like in the conventional treatment method.
One object of the invention is to provide a method for directionally depolymerizing and recycling retired fan blades, which comprises the following steps:
(1) pretreatment of leaves: crushing and drying the retired fan blade;
(2) catalytic depolymerization: sending the pretreated retired fan blade into a depolymerization device, adding a degradation liquid with catalytic oxidation property and a catalyst, carrying out oil bath heating at normal pressure, carrying out depolymerization treatment at 80-120 ℃ for 9-12 h, and separating to obtain a fiber material and a degradation residual liquid;
(3) falling film recovery: sending the degraded residual liquid obtained in the step (2) into a falling-film evaporator to recover degraded liquid, and simultaneously obtaining residual liquid sedimentation;
(4) and (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), performing centrifugal separation to obtain centrifugal solid and waste liquid, and drying the obtained centrifugal solid to obtain the degradation resin.
Preferably, the degradation liquid is any one of acetic acid and nitric acid.
Preferably, the catalyst is alumina.
Preferably, in the step (2), the feeding ratio of the retired fan blade to the degradation liquid is 1 kg: 4.5-7L of degradation liquid is added to each kilogram of retired fan blade; the material feeding ratio of the retired fan blade to the catalyst is 1 ton: 101.96g to 137.65g, namely 101.96g to 137.65g of catalyst is added to each ton of retired fan blades.
Preferably, the concentration of the degradation liquid is 5-12 mol/L.
Preferably, in step (3), the operating conditions in the falling film evaporator are: the vacuum degree of the negative pressure steam system is-0.07 MPa to-0.09 MPa, the vacuum degree of the distillation system is-0.090 MPa to-0.098 MPa, and the temperature of the flash tank is 50 ℃ to 60 ℃.
Preferably, in step (4), the centrifugation conditions are: the centrifugal speed is 2000-3500 r/min, and the centrifugal time is 2-5 min.
Preferably, in the step (4), the drying conditions are as follows: the temperature is 50-60 ℃ and the time is 15-30 min.
Compared with the prior art, the invention has the following advantages:
1. based on the cracking characteristic of an organic high molecular compound, the molecular bond of the epoxy resin is broken by opening C-N weak bonds in the epoxy resin molecules through a degradation liquid with catalytic oxidation property under the conditions of normal pressure and low temperature, a large number of reactive functional groups such as carboxyl, hydroxyl, nitro and the like are formed at the end part, and the three-dimensional network structure of the resin is broken due to the molecular bond breakage of the resin molecules, so that the aim of resin depolymerization is fulfilled.
2. The retired fan blade is recycled by adopting a catalytic oxidation directional depolymerization method, the generation of toxic and harmful substances such as hydrogen bromide and dioxin can be avoided while resources such as fiber materials and degradable resins are recycled, the fiber materials of the retired fan blade are kept in the original state and are easy to recycle, the degradable liquid can be recycled after treatment, and the directional depolymerization recycling treatment of the retired fan blade is realized.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The equipment and reagents used in the present invention are, unless otherwise specified, conventional commercial products in the art.
Example 1
(1) Pretreatment of leaves: the retired fan blade with 40.90% resin content was crushed into small pieces of about 50 x 400mm using a twin-shaft cutting apparatus and then placed in a drying chamber at 60 ℃ for drying for 24 h.
(2) Catalytic depolymerization: sending the pretreated retired fan blade into a depolymerizer, adding 6.5L of 6mol/L acetic acid solution and 127.35g of aluminum oxide into each kilogram of retired fan blade, carrying out oil bath heating at normal pressure, depolymerizing at 120 ℃ for 11 hours, and separating by using a 40-mesh screen to obtain a fiber material and a degraded residual liquid.
(3) Falling film recovery: setting the vacuum degree of a negative pressure steam system of the falling-film evaporator to be-0.085 MPa and the vacuum degree of a distillation system to be-0.095 MPa, sending the degraded residual liquid obtained in the step (2) into the falling-film evaporator, adjusting the temperature of a flash tank to 60 ℃, recovering to obtain degraded liquid, and simultaneously obtaining residual liquid sedimentation.
(4) And (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), and performing centrifugal separation to obtain centrifugal solid and waste liquid, wherein the centrifugal conditions are as follows: centrifuging at 3000r/min for 4min, and drying the obtained centrifugal solid in a dryer at 60 deg.C for 30min to obtain the degradable resin.
The retired fan blade directional depolymerization recovery method of the present embodiment 1 is used to recover the retired fan blade, and each ton of the retired fan blade can recover about 506.79kg of fiber material and 440.3kg of degradable resin.
Example 2
(1) Pretreatment of leaves: the retired fan blade with 40.90% resin content was crushed into small pieces of about 50 x 400mm using a twin-shaft cutting apparatus and then placed in a drying chamber at 60 ℃ for drying for 24 h.
(2) Catalytic depolymerization: sending the pretreated retired fan blade into a depolymerizer, adding 6.5L of 6mol/L acetic acid solution and 127.35g of aluminum oxide into each kilogram of retired fan blade, carrying out oil bath heating at normal pressure, depolymerizing at 100 ℃ for 12 hours, and separating by a 40-mesh screen to obtain a fiber material and a degraded residual liquid.
(3) Falling film recovery: setting the vacuum degree of a negative pressure steam system of the falling-film evaporator to be-0.085 MPa and the vacuum degree of a distillation system to be-0.095 MPa, sending the degraded residual liquid obtained in the step (2) into the falling-film evaporator, adjusting the temperature of a flash tank to 60 ℃, recovering to obtain degraded liquid, and simultaneously obtaining residual liquid sedimentation.
(4) And (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), and performing centrifugal separation to obtain centrifugal solid and waste liquid, wherein the centrifugal conditions are as follows: centrifuging at 3000r/min for 4min, and drying the obtained centrifugal solid in a dryer at 60 deg.C for 30min to obtain the degradable resin.
The present embodiment 2 is different from embodiment 1 only in that: in the step (2), the depolymerization treatment temperature and the depolymerization treatment time are different, and in this example 2, the depolymerization treatment is carried out at 100 ℃ for 12 hours. The retired fan blade is recycled by using the directional depolymerization recycling method for the retired fan blade in the embodiment 2, and each ton of the retired fan blade can recycle about 494.30kg of fiber materials and 459.23kg of degradable resins.
Example 3
(1) Pretreatment of leaves: the ex-service fan blades with 29.71% resin content were crushed into small pieces of about 50 x 400mm using a twin-shaft cutting apparatus and then placed in a drying chamber at 60 ℃ for drying for 24 h.
(2) Catalytic depolymerization: and (2) conveying the pretreated retired fan blade into a depolymerizer, adding 6.5L of 6mol/L acetic acid solution and 127.35g of aluminum oxide into each kilogram of retired fan blade, performing oil bath heating at normal pressure, depolymerizing at 120 ℃ for 11 hours, and separating by using a 40-mesh screen to obtain a fiber material and a degraded residual liquid.
(3) Falling film recovery: setting the vacuum degree of a negative pressure steam system of the falling-film evaporator to be-0.085 MPa and the vacuum degree of a distillation system to be-0.095 MPa, sending the degraded residual liquid obtained in the step (2) into the falling-film evaporator, adjusting the temperature of a flash tank to 60 ℃, recovering to obtain degraded liquid, and simultaneously obtaining residual liquid sedimentation.
(4) And (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), and performing centrifugal separation to obtain centrifugal solid and waste liquid, wherein the centrifugal conditions are as follows: centrifuging at 3000r/min for 4min, and drying the obtained centrifugal solid in a dryer at 60 deg.C for 30min to obtain the degradable resin.
The present embodiment 3 differs from embodiment 1 only in that: the resin content of the retired fan blade is different, and the resin content of the retired fan blade of the embodiment 3 is 29.71%. The retired fan blade directional depolymerization recovery method of the retired fan blade of the embodiment 3 is used for recovering the retired fan blade, and the retired fan blade can recover about 639.71kg of fiber materials and 297.3kg of degradable resins per ton of retired fan blade.
Example 4
(1) Pretreatment of leaves: the ex-service fan blades with 29.71% resin content were crushed into small pieces of about 50 x 400mm using a twin-shaft cutting apparatus and then placed in a drying chamber at 60 ℃ for drying for 24 h.
(2) Catalytic depolymerization: sending the pretreated retired fan blade into a depolymerizer, adding 6.5L of 6mol/L acetic acid solution and 127.35g of aluminum oxide into each kilogram of retired fan blade, carrying out oil bath heating at normal pressure, depolymerizing at 100 ℃ for 11h, and separating by a 40-mesh screen to obtain a fiber material and a degraded residual liquid.
(3) Falling film recovery: setting the vacuum degree of a negative pressure steam system of the falling-film evaporator to be-0.085 MPa and the vacuum degree of a distillation system to be-0.095 MPa, sending the degraded residual liquid obtained in the step (2) into the falling-film evaporator, adjusting the temperature of a flash tank to 60 ℃, recovering to obtain degraded liquid, and simultaneously obtaining residual liquid sedimentation.
(4) And (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), and performing centrifugal separation to obtain centrifugal solid and waste liquid, wherein the centrifugal conditions are as follows: centrifuging at 3000r/min for 4min, and drying the obtained centrifugal solid in a dryer at 60 deg.C for 30min to obtain the degradable resin.
The present embodiment 4 is different from the embodiment 3 only in that: the depolymerization treatment temperature in the step (2) was different, and the depolymerization treatment temperature in this example 4 was 120 ℃. The retired fan blade directional depolymerization recovery method of the present embodiment 4 is used to recover the retired fan blade, and each ton of the retired fan blade can recover about 625.63kg of fiber material and 308.89kg of degradable resin.
Example 5
The present example 5 is different from the example 1 only in the degradation liquid, and the degradation liquid of the present example 5 is a nitric acid solution having a concentration of 6 mol/L. The retired fan blade oriented depolymerization recovery method of the embodiment 5 is used for recovering the retired fan blade, and each ton of the retired fan blade can recover about 625.28kg of fiber materials and 308.19kg of degradable resins.
Example 6
The difference between the present example 6 and the example 1 is only the concentration of the degradation liquid, and the degradation liquid of the present example 6 is an acetic acid solution, and the concentration of the acetic acid solution is 5 mol/L. The retired fan blade oriented depolymerization recovery method of the present embodiment 6 is used to recover the retired fan blade, and each ton of the retired fan blade can recover about 620.37kg of fiber material and 302.58kg of degradable resin.
Example 7
The present example 7 is different from the example 1 only in the concentration of the degradation liquid, and the degradation liquid of the present example 7 is an acetic acid solution having a concentration of 12 mol/L. The retired fan blade directional depolymerization recovery method of the embodiment 7 is used for recovering approximately 628.05kg of fiber materials and 312.47kg of degradable resins for each ton of retired fan blades.
Example 8
The difference between the present example 8 and the present example 1 is only the concentration of the degradation liquid, and the degradation liquid of the present example 8 is an acetic acid solution having a concentration of 8 mol/L. The retired fan blade directional depolymerization recovery method of the embodiment 8 is used for recovering the retired fan blade, and each ton of the retired fan blade can recover about 625.92kg of fiber materials and 308.83kg of degradable resins.
Example 9
This example 9 is different from example 1 only in the temperature of depolymerization treatment in step (2), and step (2) of this example 9 is depolymerization treatment at 80 ℃ under normal pressure for 9 hours. The retired fan blade oriented depolymerization recovery method of the embodiment 9 is used for recovering the retired fan blade, and each ton of the retired fan blade can recover about 618.02kg of fiber materials and 300.52kg of degradable resins.
The above embodiments are only for the purpose of helping understanding the technical solution of the present invention and the core idea thereof, and it should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims (8)
1. A retired fan blade directional depolymerization recovery method is characterized by comprising the following steps: the method comprises the following steps:
(1) pretreatment of leaves: crushing and drying the retired fan blade;
(2) catalytic depolymerization: sending the pretreated retired fan blade into a depolymerization device, adding a degradation liquid with catalytic oxidation property and a catalyst, performing depolymerization treatment at the normal pressure and the temperature of 80-120 ℃ for 9-12 hours, and separating to obtain a fiber material and a degradation residual liquid;
(3) falling film recovery: sending the degraded residual liquid obtained in the step (2) into a falling-film evaporator to recover degraded liquid, and simultaneously obtaining residual liquid sedimentation;
(4) and (3) resin recovery: and (4) settling the residual liquid obtained in the step (3), performing centrifugal separation to obtain centrifugal solid and waste liquid, and drying the obtained centrifugal solid to obtain the degradation resin.
2. The method for directionally depolymerizing and recycling the retired fan blade according to claim 1, wherein the degradation liquid is any one of acetic acid and nitric acid.
3. The method of claim 2, wherein the catalyst is alumina.
4. The method for directionally depolymerizing and recycling the retired fan blade according to claim 3, wherein in the step (2), the feeding ratio of the retired fan blade to the degradation liquid is 1 kg: 4.5-7L; the material feeding ratio of the retired fan blade to the catalyst is 1 ton: 101.96 g-137.65 g.
5. The method for directionally depolymerizing and recycling the blades of the retired fan as claimed in claim 4, wherein the concentration of the degradation liquid is 5-12 mol/L.
6. The method for directionally depolymerizing and recycling decommissioned fan blades according to claim 1, wherein in step (3), the operating conditions in the falling film evaporator are as follows: the vacuum degree of the negative pressure steam system is-0.07 MPa to-0.09 MPa, the vacuum degree of the distillation system is-0.090 MPa to-0.098 MPa, and the temperature of the flash tank is 50-60 ℃.
7. The method for directionally depolymerizing and recycling the retired fan blade according to claim 1, wherein in the step (4), the centrifugal conditions are as follows: the centrifugal speed is 2000-3500 r/min, and the centrifugal time is 2-5 min.
8. The retired fan blade directional depolymerization recovery method according to claim 1, wherein in the step (4), drying conditions are as follows: the temperature is 50-60 ℃ and the time is 15-30 min.
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| CN202111549070.9A CN114634653A (en) | 2021-12-17 | 2021-12-17 | Method for directionally depolymerizing and recycling retired fan blades |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400759A (en) * | 2022-08-03 | 2022-11-29 | 广东能源集团科学技术研究院有限公司 | Catalyst for recycling thermosetting epoxy resin and recycling method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483754A (en) * | 2003-07-30 | 2004-03-24 | 哈尔滨工业大学 | Chenical recovery method for thermosetting epoxy compound material |
| CN107365429A (en) * | 2017-08-31 | 2017-11-21 | 江苏中信世纪新材料有限公司 | The application of heteropoly acid and lewis acid in thermosetting resin of degrading as catalyst |
| CN110802101A (en) * | 2019-10-29 | 2020-02-18 | 中国科学院山西煤炭化学研究所 | Method for manufacturing mould by recovering all components of wind power blade through two-step method |
-
2021
- 2021-12-17 CN CN202111549070.9A patent/CN114634653A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483754A (en) * | 2003-07-30 | 2004-03-24 | 哈尔滨工业大学 | Chenical recovery method for thermosetting epoxy compound material |
| CN107365429A (en) * | 2017-08-31 | 2017-11-21 | 江苏中信世纪新材料有限公司 | The application of heteropoly acid and lewis acid in thermosetting resin of degrading as catalyst |
| CN110802101A (en) * | 2019-10-29 | 2020-02-18 | 中国科学院山西煤炭化学研究所 | Method for manufacturing mould by recovering all components of wind power blade through two-step method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400759A (en) * | 2022-08-03 | 2022-11-29 | 广东能源集团科学技术研究院有限公司 | Catalyst for recycling thermosetting epoxy resin and recycling method thereof |
| CN115400759B (en) * | 2022-08-03 | 2023-11-10 | 广东能源集团科学技术研究院有限公司 | Catalyst for recycling thermosetting epoxy resin and recycling method thereof |
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