Application of retired fan blade in manufacturing of novel plate and manufacturing method of retired fan blade

Abstract

According to the application of the decommissioned fan blade in manufacturing of the novel plate and the manufacturing method, the plate produced through the decommissioned fan blade has the advantages of being high in waterproofness, environmentally friendly, free of pollution and the like, the scrapping pressure of the decommissioned fan blade can be relieved, and the decommissioned fan blade is energy-saving, environmentally friendly and high in economic value.

Description

Technical Field

[0001] The invention relates to an application of retired fan blades in manufacturing a new type of plate and a manufacturing method thereof, belonging to the technical field of green environmental protection and waste utilization. Background Art

[0002] The design service life of wind turbine blades is about 20-25 years. 20 years after the wind farm is built, the blades will be retired along with the main engine.

[0003] The main material of wind turbine blades is glass fiber reinforced epoxy resin (commonly known as FRP material). In order to reduce weight and ensure strength, wind turbine blades are generally made of composite materials combining glass fiber with light wood and PVC / PET. If retired wind turbine blades are recycled chemically, carbon emissions and pollution emissions will increase, and the particles after physical crushing are still a cementation of glass fiber and epoxy resin, which is difficult to separate and recycle.

[0004] At present, the mainstream disposal methods for retired blades in the world are stacking, landfilling, and recycling. There are mainly three technical paths for recycling:

[0005] First, a high-temperature method for separating composite materials is used to pyrolyze the wind turbine blades.

[0006] Second, shred retired wind turbine blades so that their materials can be reused in different products and processes;

[0007] Third, the chopped blade material is used in the production process of cement.

[0008] The above-mentioned treatment methods for retired blades have the following defects: the utilization rate is very low, the profiles required in the early stage of cascade utilization have strict size requirements, and the proportion of discarded wind turbine blades that can be used as profiles is less than 20%. The cost of the utilization process is high, because a fixed profile size is required, so destructive disassembly methods cannot be used during the blade dismemberment process. It cannot solve the problem of resource utilization of all components in retired blades. Severely damaged blades cannot be used in cascades, and balsa wood, PET, etc. in the blades cannot be used as resources. The utilization value is low, and the products produced by existing technologies are still waste materials, second-hand materials, etc., and the sales value is not high. Summary of the invention

[0009] In order to solve the above-mentioned defects and shortcomings in the prior art, the present invention provides an application of retired fan blades in manufacturing new plate materials and a manufacturing method, so as to recycle the retired fan blades and save energy and protect the environment.

[0010] To solve the above technical problems:

[0011] The first purpose of the present invention is to provide an application of retired wind turbine blades in the manufacture of new panels. Recycling retired wind turbine blades and applying them in panel manufacturing can effectively alleviate the scrapping pressure of retired blades, and the production process is not restricted by the origin and special conditions. The demand for panels is large. According to the applicant's statistics, a panel production line can process 200,000 tons of retired wind turbine blades per year, with an annual output of 130,000 cubic meters of panels, and an economic value of 1.3 billion yuan per year.

[0012] The second object of the present invention is to provide a method for manufacturing a new type of plate using retired wind turbine blades, comprising the following steps:

[0013] Step 1, separating the components of retired wind turbine power generation blades to obtain glass fiber powder, resin powder, PVC / PET powder and balsa wood powder;

[0014] Step 2, mixing the powder separated in step 1 according to the following weight parts to obtain a powder mixture: 2-10 parts of glass fiber powder, 2-5 parts of resin powder, 0.5-2 parts of PVC / PET powder, and 1-5 parts of balsa wood powder;

[0015] Step 3, spraying glue into the mixture of step 2 and stirring, wherein the mass of glue is 5%-20% of the powder mixture;

[0016] Step 4, spreading the mixture obtained by mixing the glue in step 3 on a pallet and performing multi-level leveling;

[0017] Step 5, sending the above tray to a hot press machine for hot pressing to obtain a formed sheet;

[0018] Step 6: The formed sheet is cooled and shaped in a cold press at room temperature with a pressure strength of 1kg / cm 2 Above, cold pressing time 3-10 minutes;

[0019] Step seven: the shaped board is cut, sanded, a decorative layer or a functional layer is added, and the finished product is processed, and the cut edges are recycled for reuse.

[0020] Further, the specific process of step one is as follows:

[0021] Step 1.1, the retired wind turbine blades are dismembered and crushed to separate the glass fiber epoxy resin mixture, balsa wood and PVC / PET foaming material in the blades;

[0022] Step 1.2, grinding the glass fiber epoxy resin mixture, selecting the crushed materials with a diameter less than 5 mm and grinding them by a sieve ring grinder, and then separating and collecting the grinded materials by a cyclone separator, separating the glass fibers less than 3 mm and the resin powder larger than 80 mesh, and setting them aside;

[0023] The PVC / PET foam material is crushed by a hammer mill to make a powder larger than 50 mesh for later use;

[0024] Grind the balsa wood into powder, and grind the crushed materials with a diameter less than 3mm through a sieve ring grinder to make powder larger than 20 mesh for later use.

[0025] Further, the specific process of step 1.1 is as follows:

[0026] Step 1.11, the dismembered retired wind turbine blades are cut into small pieces with a length and width of less than 1 meter. The cutting tool can be a sliding table saw or a woodworking electronic saw, and the saw blade can be a toothless saw or a multi-tooth diamond saw blade;

[0027] Step 1.12, the cut pieces are shredded using a three-axis shredder into pieces with a diameter less than 3 cm;

[0028] Step 1.13, the shredded fragments are crushed using a hammer crusher to crush into powder materials with a diameter less than 5 mm;

[0029] Step 1.14, separating the powder material using a gravity sorting sieve.

[0030] Furthermore, the powder mixture is 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder.

[0031] Furthermore, the multi-level sweeping of step 4 is specifically as follows:

[0032] The first stage is licker-in roller sweeping, with a speed of 300 rpm, a roller body diameter of 200mm, a roller surface spacing of 30mm, and a steel rod with a diameter of 10mm and a length of 30mm arranged in a plum blossom shape;

[0033] The second and third level sweeping devices are brush roller sweeping with a rotation speed of 180 rpm, a roller body diameter of 100 mm, a roller surface spacing of 20 mm, and nylon brushes arranged in a plum blossom shape with a length of 30 mm.

[0034] Furthermore, the hot press in step 5 is a multi-layer hot press or a continuous single-layer hot press, and the pressure strength is not less than 80kg / cm 2 The hot pressing temperature is 150-200℃ and the hot pressing time is 3-10min.

[0035] The beneficial technical effects achieved by the present invention are as follows: the present invention utilizes retired wind turbine blades to produce panels, which have high waterproof, environmentally friendly, pollution-free and other characteristics, and can also alleviate the scrapping pressure of retired wind turbine blades, save energy, protect the environment, and have high economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A picture of a novel plate material manufactured in Example 10 of the present invention;

[0037] Figure 2 A formaldehyde content test report of the new board material manufactured in Example 10 of the present invention;

[0038] Figure 3 Antibacterial test report of the new board material manufactured in Example 10 of the present invention;

[0039] Figure 4 A density test report of a new type of plate material manufactured according to Example 10 of the present invention;

[0040] Figure 5 This is a test report on the water absorption expansion rate of the new board material manufactured in Example 10 of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with specific examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention.

[0042] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0043] The present invention provides a method for manufacturing a new type of plate by using retired wind turbine blades, comprising the following steps:

[0044] Step 1: Separate the components of retired wind turbine blades to obtain glass fiber powder, resin powder, PVC / PET powder and balsa wood powder:

[0045] Retired wind turbines are dismantled in order using lifting equipment to remove wind turbine blades, hoods, towers and other components; wind turbine blades are dismembered by mechanical equipment or manually for easy transportation, and then sent to recycling sites.

[0046] Step 1.1: After dismemberment, the blades are pulverized to separate the glass fiber epoxy resin mixture, balsa wood and PVC / PET foaming material in the blades; specifically: Step 1.11: The dismembered retired wind turbine blades are cut into small pieces with a length and width of less than 1 meter. The cutting tool can be a sliding table saw or a woodworking electronic saw, and the saw blade can be a toothless saw or a multi-tooth diamond saw blade; Step 1.12: The cut small pieces are shredded by a three-axis shredder into pieces with a diameter of less than 3 cm; Step 1.13: The shredded pieces are crushed by a hammer crusher into powder materials with a diameter of less than 5 mm; Step 1.14: The powder material contains three types of materials, among which the density of the glass fiber epoxy resin mixture (glass fiber reinforced plastic material) is about 500-900 kg / m 3 The density of balsa wood is 120-160kg / m3, and the density of PVC / PET foam is 60-100kg / m 3, according to the difference in weight, the above materials are separated by gravity sorting screen. The powder material enters the guide plate from the upper feed port of the gravity sorting screen. The guide plate is made of 80 mesh stainless steel screen. Clean air is blown in from the bottom to form an air cushion on the surface of the guide plate. The guide plate moves back and forth. The heavier material overflows from the front discharge port, and the lighter material flows out from the rear discharge port. The whole separation process is divided into two steps. First, the glass fiber epoxy resin mixture is separated from the other two materials, and then the light wood (balsa wood) is separated from the PVC / PET foaming material.

[0047] Step 1.2, grinding the glass fiber epoxy resin mixture, selecting the crushed materials with a diameter less than 5 mm and grinding them by a sieve ring grinder, and then separating and collecting the grinded materials by a cyclone separator, separating the glass fibers less than 3 mm and the resin powder larger than 80 mesh, and setting them aside;

[0048] The PVC / PET foam material is crushed by a hammer mill to make a powder larger than 50 mesh for later use;

[0049] Grind the balsa wood into powder, and grind the crushed wood with a diameter less than 3 mm through a sieve ring grinder to make a powder larger than 20 mesh for later use.

[0050] Step 2, mixing the powder separated in step 1 in a drum mixer according to the following weight parts to obtain a powder mixture; wherein the powder mixture comprises 2-10 parts of glass fiber powder, 2-5 parts of resin powder, 0.5-2 parts of PVC / PET powder, and 1-5 parts of balsa wood powder;

[0051] Step 3, spraying glue into the mixture in the drum glue mixer of step 2 and stirring, the mass of glue is 5%-20% of the powder mixture; the stirring speed is 900-960 rpm; the glue can be polyurethane glue or phenolic resin glue;

[0052] Step 4: Spread the mixture mixed in step 3 on a pallet, and perform multi-stage sweeping and leveling by a multi-stage sweeping and leveling device to ensure the uniformity of the paving; the multi-stage sweeping and leveling includes: the first stage is a licker-in roller sweeping and leveling, the rotation speed is 300 rpm, the roller body diameter is 200 mm, the roller surface spacing is 30 mm, and the steel rods with a diameter of 10 mm and a length of 30 mm are arranged in a plum blossom shape;

[0053] The second and third level sweeping devices are brush roller sweeping with a rotation speed of 180 rpm, a roller body diameter of 100 mm, a roller surface spacing of 20 mm, and nylon brushes arranged in a plum blossom shape with a length of 30 mm.

[0054] Step 5: Send the above tray to a hot press machine for hot pressing to obtain a formed sheet; the hot press machine is a multi-layer hot press machine or a continuous single-layer hot press machine, and the pressure strength is not less than 80kg / cm 2The hot pressing temperature is 150-200℃ and the hot pressing time is 3-10min.

[0055] Step 6: The formed sheet is cooled and shaped in a cold press at room temperature with a pressure strength of 1kg / cm 2 Above, cold pressing time 3-10 minutes;

[0056] Step seven, the shaped board is cut, the loose parts around are removed, and the edge materials are recycled for reuse; the board after cutting is transported to the sanding machine for sanding to remove the uneven parts on the surface, and the sanding accuracy is above 80 mesh; then the decorative layer or functional layer is added and the finished product is processed.

[0057] Example 1

[0058] The novel board material was prepared by the above method, wherein the powder mixture consisted of 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder and 2 parts of balsa wood powder.

[0059] Example 2

[0060] The novel board material is prepared by the above method, wherein the powder mixture comprises 2 parts of glass fiber powder, 2 parts of resin powder, 1 part of PVC / PET powder and 2 parts of balsa wood powder.

[0061] Example 3

[0062] The novel board material was prepared by the above method, wherein the powder mixture consisted of 4 parts of glass fiber powder, 3 parts of resin powder, 0.5 parts of PVC / PET powder and 5 parts of balsa wood powder.

[0063] Example 4

[0064] The novel board material was prepared by the above method, wherein the powder mixture was 10 parts of glass fiber powder, 5 parts of resin powder, 2 parts of PVC / PET powder and 5 parts of balsa wood powder.

[0065] Example 5

[0066] The novel board material was prepared by the above method, wherein the powder mixture consisted of 6 parts of glass fiber powder, 4 parts of resin powder, 1.5 parts of PVC / PET powder and 3 parts of balsa wood powder.

[0067] Example 6

[0068] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 180°C and the hot pressing time was 5 minutes.

[0069] Example 7

[0070] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 150°C and the hot pressing time was 10 minutes.

[0071] Example 8

[0072] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 200°C and the hot pressing time was 3 minutes.

[0073] Example 9

[0074] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 160°C and the hot pressing time was 8 minutes.

[0075] Example 10

[0076] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 180°C, and the hot pressing time was 5 minutes. The mass of the glue was 10% of the powder mixture; and the stirring speed was 940 rpm.

[0077] Embodiment 11

[0078] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 180°C, and the hot pressing time was 5 minutes. The mass of the glue was 5% of the powder mixture; and the stirring speed was 960 rpm.

[0079] Example 12

[0080] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 180°C, and the hot pressing time was 5 minutes. The mass of the glue was 20% of the powder mixture; and the stirring speed was 900 rpm.

[0081] Example 13

[0082] The new board was prepared by the above method, wherein the powder mixture was 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder. The hot pressing temperature was 180°C, and the hot pressing time was 5 minutes. The mass of the glue was 12% of the powder mixture; and the stirring speed was 950 rpm.

[0083] The plate manufactured in Example 10 is selected as a representative sample for display. Figure 1 The product was sent to SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd. for testing. The test results are as follows: Figure 2-Figure 5 As shown. Figure 2 It can be seen that the formaldehyde emission of the board manufactured by the present invention fully complies with GB18580-2017. Figure 3 The antibacterial test displayed shows that after 24 hours of contact with E. coli, the amount of bacteria is less than 30 CFU / mL, and the reduction rate of bacteria is greater than 99% compared with the control sample. Figure 4 and Figure 5 It can be seen that the density of the board material of the present invention is 1.35 g / cm 3 The water absorption expansion rate is 0.3%, compared with the density of conventional wood panels of 0.6-0.8g / cm 3 The density of the board of the present invention is increased by 1 times; and compared with the water absorption expansion rate of conventional wood boards of 5%-25%, the water absorption expansion rate of the board of the present invention is reduced by about 20-700 times. The present invention has been disclosed above with preferred embodiments, but it is not used to limit the present invention. Any technical solution obtained by adopting equivalent replacement or equivalent transformation solutions falls within the protection scope of the present invention.

Claims

1. Application of retired wind turbine blades in manufacturing new types of panels.

2. A method for manufacturing a new type of plate using retired wind turbine blades, characterized in that: The following steps are involved: Step 1, separating the components of retired wind turbine power generation blades to obtain glass fiber powder, resin powder, PVC / PET powder and balsa wood powder; Step 2, mixing the powder separated in step 1 according to the following weight parts to obtain a powder mixture: 2-10 parts of glass fiber powder, 2-5 parts of resin powder, 0.5-2 parts of PVC / PET powder, and 1-5 parts of balsa wood powder; Step 3, spray glue into the mixture of step 2 and stir, the mass of glue is 5%-20% of the powder mixture; Step 4, spreading the mixture obtained by mixing the glue in step 3 on a pallet and performing multi-level leveling; Step 5, sending the above tray to a hot press machine for hot pressing to obtain a formed sheet; Step 6: The formed sheet is cooled and shaped in a cold press at room temperature with a pressure strength of 1 kg / cm 2 Above, cold pressing time 3-10 minutes; Step seven: the shaped board is cut, sanded, a decorative layer or a functional layer is added, and the finished product is processed, and the cut edges are recycled for reuse.

3. The method for manufacturing a new type of plate using retired wind turbine blades according to claim 2, characterized in that The specific process of step one is as follows: Step 1.1, the retired wind turbine blades are dismembered and crushed to separate the glass fiber epoxy resin mixture, balsa wood and PVC / PET foaming material in the blades; Step 1.2, grinding the glass fiber epoxy resin mixture, selecting the crushed materials with a diameter less than 5 mm and grinding them by a sieve ring grinder, and then separating and collecting the grinded materials by a cyclone separator, separating the glass fibers less than 3 mm and the resin powder larger than 80 mesh, and setting them aside; The PVC / PET foam material is crushed by a hammer mill to make a powder larger than 50 mesh for later use; Grind the balsa wood into powder, and grind the crushed materials with a diameter less than 3mm through a sieve ring grinder to make powder larger than 20 mesh for later use.

4. The method for manufacturing a new type of plate using retired wind turbine blades according to claim 2, characterized in that The specific process of step 1.1 is as follows: Step 1.11, the dismembered retired wind turbine blades are cut into small pieces with a length and width of less than 1 meter. The cutting tool can be a sliding table saw or a woodworking electronic saw, and the saw blade can be a toothless saw or a multi-tooth diamond saw blade; Step 1.12, the cut pieces are shredded using a three-axis shredder into pieces with a diameter less than 3 cm; Step 1.13, the shredded fragments are crushed using a hammer crusher to crush into powder materials with a diameter less than 5 mm; Step 1.14, separating the powder material using a gravity sorting sieve.

5. The method for manufacturing a new type of plate using retired wind turbine blades according to claim 2, characterized in that: The powder mixture is 4 parts of glass fiber powder, 3 parts of resin powder, 1 part of PVC / PET powder, and 2 parts of balsa wood powder.

6. The method for manufacturing a new type of plate using retired wind turbine blades according to claim 2, characterized in that The multi-level sweeping of step 4 is as follows: The first stage is licker-in roller sweeping, with a speed of 300 rpm, a roller body diameter of 200mm, a roller surface spacing of 30mm, and a steel rod with a diameter of 10mm and a length of 30mm arranged in a plum blossom shape; The second and third level sweeping devices are brush roller sweeping with a rotation speed of 180 rpm, a roller body diameter of 100 mm, a roller surface spacing of 20 mm, and nylon brushes arranged in a plum blossom shape with a length of 30 mm.

7. The method for manufacturing a new type of plate using retired wind turbine blades according to claim 2, characterized in that: Step 5: The hot press is a multi-layer hot press or a continuous single-layer hot press, and the pressure strength is not less than 80kg / cm 2 The hot pressing temperature is 150-200℃ and the hot pressing time is 3-10min.

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