Sorting equipment and methods for waste fiberglass recycled fibers

Abstract

This invention provides a sorting device and method for waste fiberglass recycled fibers, belonging to the field of fiberglass processing technology. The device includes: a crushing and separating unit, used to crush and separate mixed fiber mixtures by generating a high-gravity field through rotation, obtaining recycled fibers of different sizes; a fiber collecting unit, connected to the air outlet of the crushing and separating unit, used to collect recycled fibers of different sizes; and an air injection unit, connected to the crushing and separating unit and the fiber collecting unit, used to simultaneously introduce gas into the crushing and separating unit and the fiber collecting unit during the fiber collecting process, or to introduce gas only into the crushing and separating unit, causing the recycled fibers to flow with the airflow to the fiber collecting unit. The waste fiberglass recycled fiber sorting device and method of this invention have the advantages of simple structure, low raw material loss, high sorting efficiency, high product purity, and achieve high-purity green recycling and high-value-added utilization of fiberglass.

Description

Technical Field

[0001] This invention relates to the field of fiberglass processing technology, specifically to a sorting device and a sorting method for waste fiberglass recycled fibers. Background Technology

[0002] Fiberglass reinforced plastic (FRP) is a thermosetting composite material made of glass fiber as reinforcement and epoxy resin, unsaturated polyester resin, or polyurethane resin as the matrix resin. Waste FRP refers to waste scraps, substandard products, and other composite materials generated during the production, transportation, sales, and use of FRP-related industrial enterprises, as well as composite materials damaged or rendered unusable during their working or end-of-life periods due to their inability to meet performance requirements. Traditional methods of waste FRP disposal include landfilling and incineration; however, these practices consume significant land resources, cause serious groundwater and air pollution, and fail to fully utilize the residual mechanical properties and value of the composite material.

[0003] Traditional waste fiberglass recycling generally involves cutting, crushing, separating, and application. After cutting, fiberglass can be further crushed and separated according to material classification before being applied to different fields. Some resin materials require further grinding into a finer powder depending on the application requirements. However, crushing uncrushed solid mixtures results in a clump-like mixture, which is a mixture of fiberglass fibers of different sizes agglomerated together, making it difficult to separate and obtain relatively uniform recycled fibers, thus reducing the added value of subsequent applications. Summary of the Invention

[0004] The purpose of this invention is to provide a sorting device and method for waste fiberglass recycled fibers. This sorting device and method solves the problem that the unground solid mixture is crushed to obtain a clump mixture that is difficult to separate, resulting in less uniform recycled fibers and reduced added value for subsequent applications.

[0005] To achieve the above objectives, embodiments of the present invention provide a sorting device for waste fiberglass recycled fibers, the device comprising:

[0006] The crushing and separating device is used to crush and separate mixed fiber mixtures by generating a supergravity field through rotation, so as to obtain regenerated fibers of different sizes;

[0007] A fiber collection device is connected to the air outlet of the crushing and separating device and is used to collect recycled fibers of different sizes.

[0008] An air injection device is connected to the crushing and separating device and the fiber collecting device. It is used to simultaneously introduce gas into the crushing and separating device and the fiber collecting device during the process of the fiber collecting device collecting regenerated fibers, or to introduce gas only into the crushing and separating device, so that the regenerated fibers flow with the airflow to the fiber collecting device.

[0009] Optionally, the device further includes:

[0010] A feeding device is installed at the top of the crushing and separating device for feeding the mixed fiber mixture into the crushing and separating device;

[0011] A recycling device is installed at the bottom of the crushing and separating device to recycle the uncrushed mixed fiber mixture that does not flow with the airflow.

[0012] Optionally, the crushing and separation device is a high-gravity rotating bed.

[0013] Optionally, the fiber collecting device includes:

[0014] The screening mechanism is connected to the crushing and separating device at its feed end. The screening mechanism has multiple screens of different screening sizes arranged sequentially along the airflow direction, and each screen has a discharge port at its rear end.

[0015] Multiple fiber collection bins are connected to corresponding discharge ports. The fiber collection bins are used to collect recycled fibers of different sizes, and each fiber collection bin is equipped with a gas outlet.

[0016] Optionally, the sieving size of the screen decreases sequentially along the airflow direction.

[0017] Optionally, the fiber collecting device further includes:

[0018] Multiple buffer bins, with each fiber collection bin except the fiber collection bin corresponding to the last discharge port connected to its corresponding discharge port through the buffer bin.

[0019] Optionally, the gas injection device is connected to each buffer chamber.

[0020] This invention also provides a method for sorting waste fiberglass recycled fibers, applied to the aforementioned waste fiberglass recycled fiber sorting equipment, the method comprising:

[0021] Close the inlet of each fiber collection bin in the fiber collection device, except for the fiber collection bin corresponding to the last discharge port;

[0022] The feeding device controls the conveying of the mixed fiber mixture into the crushing and separating device for crushing and separation;

[0023] The gas injection device simultaneously introduces gas into the buffer chambers of the crushing and separating device and the fiber collection device, and uses the fiber collection chamber corresponding to the end discharge port to collect the recycled fibers of the corresponding size.

[0024] After a preset time, the feed inlet of the fiber collection bin corresponding to the last discharge port is closed, the feed inlets of the remaining fiber collection bins are opened, and the air injection device is controlled to stop supplying gas to the buffer bin of the fiber collection device to collect recycled fibers of the corresponding size.

[0025] Optionally, after a preset time, the feed inlet of the fiber collection bin corresponding to the last discharge port is closed, the feed inlets of the remaining fiber collection bins are opened, and the air injection device is controlled to stop supplying gas to the buffer bin of the fiber collection device, thereby collecting recycled fibers of the corresponding size, including:

[0026] After a preset time, the feed inlet of the fiber collection bin corresponding to the last discharge port is closed. Following the opposite direction of airflow and at preset time intervals, the feed inlets of the corresponding fiber collection bins are opened sequentially, and the gas supply to the corresponding buffer bins is stopped to collect recycled fibers of the corresponding size.

[0027] Optionally, the feeding device can convey the mixed fiber mixture into the crushing and separating device at a speed of 5-15 kg / h;

[0028] The rotational speed of the crushing and separating device is 800-2000 r / min;

[0029] The gas injection device supplies gas to the crushing and separation device at a rate of 30-60 L / min.

[0030] The gas injection device introduces gas into the fiber collection device at a rate of 10-20 L / min.

[0031] This technical solution uses a crushing and separation device to crush mixed fiber mixtures, and combines it with an air injection device to transport regenerated fibers. Then, a fiber collection device is used to collect regenerated fibers of different sizes. It has the advantages of simple system structure, small equipment size, significant strengthening effect, low raw material loss, high sorting efficiency, high product purity, and good repeatability. It realizes the treatment of solid waste generated from waste fiberglass, and achieves high-purity green recycling and high-value-added utilization of fiberglass.

[0032] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of the first type of waste fiberglass recycled fiber sorting equipment provided by the present invention;

[0035] Figure 2 This is a flowchart of the sorting method for waste fiberglass recycled fibers provided by the present invention.

[0036] Explanation of reference numerals in the attached figures

[0037] 1- Crushing and separating device; 2- Fiber collecting device; 3- Air injection device;

[0038] 4-Feeding device; 21-Screening mechanism; 22-Fiber collection bin;

[0039] 23-Buffer bin; 211-Screen; 212-Discharge port;

[0040] 221 - Gas outlet. Detailed Implementation

[0041] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0042] In the embodiments of the present invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use.

[0043] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0044] The terms "parallel" and "perpendicular" do not mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be completely parallel, but that it can be slightly tilted.

[0045] The terms "horizontal," "vertical," and "sag" do not imply that a component must be absolutely horizontal, vertical, or sagging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0046] Furthermore, terms like "roughly" and "basically" are used to indicate that the content does not require absolute precision, but rather allows for a certain degree of deviation. For example, "roughly equal" does not simply mean absolute equality; in actual production and operation, achieving absolute "equality" is difficult, and a certain degree of deviation is generally present. Therefore, besides absolute equality, "roughly equal to" also includes the aforementioned situation where a certain degree of deviation exists. Using this as an example, in other cases, unless otherwise specified, terms like "roughly" and "basically" have similar meanings.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Figure 1 This is a schematic diagram of the structure of the first type of waste fiberglass recycled fiber sorting equipment provided by the present invention; Figure 2 This is a flowchart of the sorting method for waste fiberglass recycled fibers provided by the present invention.

[0049] This embodiment provides a sorting device for waste fiberglass recycled fibers, such as... Figure 1 As shown, the device includes:

[0050] The crushing and separating device 1 is used to crush and separate the mixed fiber mixture by generating a supergravity field through rotation to obtain regenerated fibers of different sizes;

[0051] Fiber collection device 2 is connected to the air outlet of the crushing and separating device 1 and is used to collect recycled fibers of different sizes.

[0052] The gas injection device 3 is connected to the crushing and separating device 1 and the fiber collecting device 2. It is used to simultaneously introduce gas into the crushing and separating device 1 and the fiber collecting device 2 during the process of collecting regenerated fibers in the fiber collecting device 2, or to introduce gas only into the crushing and separating device 1, so that the regenerated fibers flow to the fiber collecting device 2 with the airflow.

[0053] Specifically, the gas injection device 3 can be configured as a gas cylinder, gas compressor, etc., and the outlet of the gas injection device 3 is equipped with a pressure regulating valve to regulate the gas outlet flow rate and pressure. After the crushing and separation device 1 rotates to generate a supergravity field to crush and separate the mixed fiber mixture, smaller regenerated fibers will be produced. The regenerated fibers will flow with the injected airflow and eventually flow to the fiber collection device 2 for size-based collection.

[0054] Furthermore, the device also includes:

[0055] Feeding device 4 is located at the top of the crushing and separating device 1 and is used to feed the mixed fiber mixture into the crushing and separating device 1;

[0056] The recycling device 5 is located at the bottom of the crushing and separating device 1 and is used to recycle the uncrushed mixed fiber mixture that does not flow with the airflow.

[0057] Specifically, the feeding device 4 is a solid mixing and introducing device, equipped with a conveyor belt to introduce the solid mixture into the crushing and separating device 1 at a rate of 5-15 kg / h.

[0058] The recycling device 5 is configured as a recycling bin, located at the bottom of the crushing and separating device 1. Large or sheet-like fiber bundles that fall due to gravity within the rotating bed due to insufficient gas-solid interaction eventually fall into the recycling bin. The short fiber collection bin collects short fibers of a specific size. This collection bin, in conjunction with other valves and flow control, ensures that the fibers are sorted within the required size range.

[0059] Furthermore, the crushing and separation device 1 is a high-gravity rotating bed.

[0060] Specifically, the main body of the high-gravity rotating bed is equipped with a packing material, a motor, a rotor, a mixed fiber mixture, and a gas flow channel. The packing material is arranged in a ring shape. The mixed fiber mixture enters the packing material through the channel. The rotor of the motor rotates, which drives the packing material to rotate, generating a high-gravity field and causing the mixed fiber mixture to interact with the packing material. The packing material performs enhanced shearing treatment on the mixed fiber mixture. At the same time, the gas passes through the packing layer and blows the fibers into the collection bin.

[0061] The rotor speed is 800-2000 r / min. The packing is an effective contact module for gas-solid interaction, and the packing is selected from both structured packing (stainless steel porous corrugated plate packing) and irregular packing (wire mesh packing).

[0062] Furthermore, the fiber collecting device 2 includes:

[0063] Screening mechanism 21, the feed end of the screening mechanism 21 is connected to the crushing and separating device 1, and multiple screens 211 of different screening sizes are arranged in sequence along the airflow direction in the screening mechanism 21, and each screen 211 has a discharge port 212 at its rear end.

[0064] Multiple fiber collection bins 22 are connected to corresponding discharge ports 212. The fiber collection bins 22 are used to collect recycled fibers of different sizes. Each fiber collection bin 22 is provided with a gas outlet 221.

[0065] Specifically, the number of screens corresponds to the number of fiber collection bins. That is, when the screening mechanism 21 includes two layers of screens (a first layer of screens and a second layer of screens), there are also two fiber collection bins 22, including a short fiber collection bin and a long fiber collection bin. Preferably, the diameter of the first layer of screens is set to 3 mm, and the diameter of the second layer of screens is set to 20 mm.

[0066] Furthermore, along the direction of airflow, the screening size of screen 211 decreases sequentially.

[0067] Specifically, this method ensures smooth airflow and enables the grading and screening of recycled fibers of different sizes. If three layers of screens 211 are set, the screening sizes of the screens 211 along the airflow direction are 20mm, 20mm and 5mm respectively.

[0068] Furthermore, the fiber collecting device 2 also includes:

[0069] Multiple buffer chambers 23, except for the fiber collection chamber 22 corresponding to the last discharge port 212, each fiber collection chamber 22 is connected to the corresponding discharge port 212 through the buffer chamber 23.

[0070] Specifically, the buffer bin is a buffer device for temporarily storing longer fibers. During operation, it works in conjunction with other valves and air flow to feed the longer fibers into the long fiber collection bin. The long fiber collection bin is a device for collecting long fibers. During operation, it works in conjunction with other valves and air flow to feed the longer fibers into the long fiber collection bin.

[0071] Furthermore, the gas injection device 3 is connected to each buffer chamber 23.

[0072] In summary, this scheme utilizes the high-speed centrifugal force generated by the motor to disperse the solid mixture within the rotating bed packing. The solid mixture interacts with the packing, which intensifies the shearing action on the mixed fiber mixture. Simultaneously, gas passes through the packing layer, blowing the fibers into the collection bin, while large fiber bundles fall into the recovery bin. Previously partially adhered fibers are thoroughly broken up and separated during this process. Using a high-gravity rotating bed to separate mixed fiber solid mixtures significantly improves the dispersion effect without altering the fiber properties. The separation efficiency can reach over 95% using the high-gravity field. The type and structure of the packing are crucial factors affecting the separation effect. The type of packing influences the strength of the shearing action on the solid mixture, and whether structured packing is used affects the dynamic balance performance of the entire high-gravity rotating bed.

[0073] This embodiment also provides a method for sorting waste fiberglass recycled fibers, applied to the aforementioned waste fiberglass recycled fiber sorting equipment, such as... Figure 2 As shown, the method includes:

[0074] Step 101: Close the inlet of each fiber collection bin in the fiber collection device, except for the fiber collection bin corresponding to the last discharge port;

[0075] Step 102: Control the feeding device to convey the mixed fiber mixture into the crushing and separating device for crushing and separation;

[0076] Step 103: Control the gas injection device to simultaneously introduce gas into the buffer chambers of the crushing and separating device and the fiber collection device, and use the fiber collection bin corresponding to the last discharge port to collect the recycled fibers of the corresponding size.

[0077] Step 104: After a preset time, close the feed inlet of the fiber collection bin corresponding to the last discharge port, open the feed inlets of the remaining fiber collection bins, and control the air injection device to stop supplying gas to the buffer bin of the fiber collection device to collect the corresponding size of recycled fibers.

[0078] Further, in step 104, after a preset time, the inlet of the fiber collection bin corresponding to the last outlet is closed, the inlets of the remaining fiber collection bins are opened, and the air injection device is controlled to stop supplying gas to the buffer bin of the fiber collection device, thereby collecting recycled fibers of the corresponding size, including:

[0079] After a preset time, the feed inlet of the fiber collection bin corresponding to the last discharge port is closed. Following the opposite direction of airflow and at preset time intervals, the feed inlets of the corresponding fiber collection bins are opened sequentially, and the gas supply to the corresponding buffer bins is stopped to collect recycled fibers of the corresponding size.

[0080] Specifically, to ensure screening efficiency and the quality of recycled fibers, a control method is adopted where only the inlet of one fiber collection bin is opened at a time, and gas supply to the buffer chamber of that opened fiber collection bin is stopped. The inlet status of the remaining fiber collection bins and the gas supply status of the buffer chambers remain unchanged. For example, a three-stage screen, three fiber collection bins, and two buffer chambers are set up, with the screens arranged sequentially along the airflow direction as the first, second, and third screens, corresponding to the first, second, and third fiber collection bins (collecting recycled fibers of progressively smaller sizes). The buffer chambers are the first and second buffer chambers. The third fiber collection bin is located at the very end. When collection through the second fiber collection bin is required, the inlet of the third fiber collection bin is closed, gas supply to the second buffer chamber is stopped, and the second fiber collection bin is opened to collect recycled fibers of the corresponding size.

[0081] Furthermore, the feeding device conveys the mixed fiber mixture into the crushing and separating device at a speed of 5-15 kg / h;

[0082] The rotational speed of the crushing and separating device is 800-2000 r / min;

[0083] The gas injection device supplies gas to the crushing and separation device at a rate of 30-60 L / min.

[0084] The gas injection device introduces gas into the fiber collection device at a rate of 10-20 L / min.

[0085] Specifically, taking a setup with two layers of screens and two collection bins (short fiber collection bin and long fiber collection bin) as an example, each collection bin's inlet and the buffer bin's inlet are equipped with valves.

[0086] First, the mixed fiber solid mixture is fed into the high-gravity rotating bed at a certain flow rate of 5-15 kg / h through a feeding device. The solid mixture moves downwards through the central pipe under the action of gravity. The high-gravity effect is generated by a motor, and the high-gravity rotation speed is 800-2000 r / min. In the high-gravity rotating bed, under the action of the high-gravity field generated by high-speed centrifugation, the mixture is dispersed in the rotating bed packing and interacts with the packing. The packing performs enhanced shearing treatment on the mixed fiber mixture, and the originally partially adhered fibers are fully broken and separated in this process. Afterwards, the separated fibers are blown into the short fiber collection bin and the long fiber collection bin by air at a certain flow rate of 30-60 L / min. Before entering the collection bin, the fibers need to be screened by screens. The first screen has a diameter of 3 mm, and the second screen has a diameter of 20 mm. In actual operation, to collect short fibers, the valve of the long fiber collection silo is first closed to prevent short fibers from being blown into it. The valves of the short fiber collection silo and the buffer silo are then opened to allow short fibers to be collected smoothly. The buffer silo temporarily stores long fibers and a small amount of short fibers. Some short fibers are further purged into the short fiber collection silo by air at a flow rate of 10-20 L / min. To collect long fibers, the valves of the long fiber collection silo and the buffer silo are first closed. The valve of the long fiber collection silo is then opened, and fibers that have not entered the short fiber collection silo and the buffer silo are blown into the long fiber collection silo by airflow. This process achieves high-purity separation of mixed fibers. Uncollected fibers are sent to the recycling silo for further separation.

[0087] Example 1:

[0088] The waste fiberglass material being processed is a thermosetting composite material with epoxy resin as the matrix resin. The workflow of this invention is as follows: First, a mixed fiber-solid mixture is fed into a high-gravity rotating bed at a flow rate of 10 kg / h via a feeding device. The solid mixture moves downwards through a central pipe under gravity. The high-gravity rotation speed is 1000 r / min. In the high-gravity rotating bed, under the influence of the high-gravity field generated by high-speed centrifugation, the fibers are dispersed in the rotating bed packing and interact with the packing. The packing performs enhanced shearing treatment on the mixed fiber mixture, and the originally partially adhered fibers are fully broken and separated in this process. Stainless steel porous corrugated plate packing is selected. The separated fibers are then blown by air at a flow rate of 50 L / min into short fiber and long fiber collection bins. Before entering the collection bins, they need to be screened. The first screen has a diameter of 3 mm, and the second screen has a diameter of 20 mm. Utilizing the effect of the high-gravity field, the weight of long fibers and short fibers / weight of the solid mixture = 97.5%.

[0089] The length range of short fibers: the fiber size of short fiber silos is 0.5-3.75mm, and the fiber size of long fiber silos is 4.5-22.5mm.

[0090] Example 2: The rotational speed under hypergravity was 800 r / min, and other conditions were the same as in Example 1.

[0091] Example 3: The rotational speed under hypergravity was 2000 r / min, and other conditions were the same as in Example 1.

[0092] Example 4: The flow rate of the solid mixture was 15 kg / h, and other conditions were the same as in Example 1.

[0093] Example 5: The airflow rate of the high-gravity rotating bed was 30 L / min, and other conditions were the same as in Example 1.

[0094] Example 6: The type of filler selected is wire mesh filler, and other conditions are the same as in Example 1.

[0095] Example 7: The high-gravity rotating bed is not in operation, and other conditions are the same as in Example 1.

[0096] Detailed experimental conditions are shown in Table 1 below. According to the experimental results, the sorting efficiency of Example 1 is 97.5%. Increasing the rotational speed in the hypergravity environment increases energy consumption, but the improvement in sorting efficiency is not significant. Conversely, decreasing the rotational speed significantly reduces the sorting efficiency. The solid flow rate and gas flow rate affect the sorting efficiency to varying degrees. The type and structure of the packing material are important factors affecting the sorting effect. The type of packing material affects the strength of its shearing effect on the solid mixture. Using structured packing material with stainless steel porous corrugated plates results in significantly better sorting efficiency than using irregular packing material. Furthermore, a comparison was made when the hypergravity rotating bed was not in operation; the sorting efficiency decreased significantly, indicating that the high-speed centrifugal force generated by the hypergravity rotating bed plays a crucial role.

[0097] Table 1 Comparison of Experimental Conditions and Results

[0098]

[0099]

[0100] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0101] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0102] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0103] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. A method for sorting waste fiberglass recycled fibers, applied to a waste fiberglass recycled fiber sorting device, characterized in that, The device includes: The crushing and separating device (1) is used to crush and separate the mixed fiber mixture by generating a supergravity field through rotation to obtain regenerated fibers of different sizes; A fiber collecting device (2) is connected to the air outlet of the crushing and separating device (1) and is used to collect recycled fibers of different sizes. The gas injection device (3) is connected to the crushing and separating device (1) and the fiber collecting device (2) and is used to simultaneously introduce gas into the crushing and separating device (1) and the fiber collecting device (2) during the process of collecting regenerated fibers in the fiber collecting device (2), or to introduce gas only into the crushing and separating device (1) so that the regenerated fibers flow to the fiber collecting device (2) with the airflow. A feeding device (4) is provided at the top of the crushing and separating device (1) for conveying the mixed fiber mixture to the crushing and separating device (1); The fiber collecting device (2) includes: Screening mechanism (21), the feed end of the screening mechanism (21) is connected to the crushing and separating device (1), and multiple screens (211) of different screening sizes are arranged in sequence along the airflow direction in the screening mechanism (21). Along the airflow direction, the screening size of the screen (211) decreases in sequence, and each screen (211) has a discharge port (212) at its rear end. Multiple fiber collection bins (22) are connected to corresponding discharge ports (212). The fiber collection bins (22) are used to collect recycled fibers of different sizes. Each fiber collection bin (22) is provided with a gas outlet (221). Multiple buffer chambers (23), except for the fiber collection chamber (22) corresponding to the last discharge port (212), each fiber collection chamber (22) is connected to the corresponding discharge port (212) through the buffer chamber (23); the air injection device (3) is connected to each buffer chamber (23); The method includes: Close the inlet of each fiber collection bin in the fiber collection device, except for the fiber collection bin corresponding to the last discharge port; The feeding device controls the conveying of the mixed fiber mixture into the crushing and separating device for crushing and separation; The gas injection device simultaneously introduces gas into the buffer chambers of the crushing and separating device and the fiber collection device, and uses the fiber collection chamber corresponding to the end discharge port to collect the recycled fibers of the corresponding size. After a preset time, the feed inlet of the fiber collection bin corresponding to the last discharge port is closed. Following the opposite direction of airflow and at preset time intervals, the feed inlets of the corresponding fiber collection bins are opened sequentially, and the gas supply to the corresponding buffer bins is stopped to collect recycled fibers of the corresponding size.

2. The sorting method for waste fiberglass recycled fibers according to claim 1, characterized in that, The device also includes: The recycling device (5) is located at the bottom of the crushing and separating device (1) and is used to recycle the uncrushed mixed fiber mixture that does not flow with the airflow.

3. The sorting method for waste fiberglass recycled fibers according to claim 1, characterized in that, The crushing and separation device (1) is a high-gravity rotating bed.

4. The sorting method for waste fiberglass recycled fibers according to claim 1, characterized in that, The feeding device conveys the mixed fiber mixture into the crushing and separating device at a speed of 5-15 kg / h; The rotational speed of the crushing and separating device is 800-2000 r / min; The gas injection device supplies gas to the crushing and separation device at a rate of 30-60 L / min. The gas injection device introduces gas into the fiber collection device at a rate of 10-20 L / min.

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