Waste wind power blade crushing and sorting process

Abstract

The invention relates to the technical field of waste recovery, and discloses a waste wind power blade crushing and sorting process which comprises the following steps: cutting / segmenting a waste wind power blade; the cut / segmented waste wind power blades are fed into a coarse crusher to be subjected to coarse crushing; feeding the coarsely crushed material into a fine crusher for fine crushing; feeding the finely crushed material into a crusher for crushing; the crushed materials are subjected to iron removal treatment; the crushed materials are screened through screening equipment; separating glass fibers and balsa wood from the screened materials through water flotation; and respectively feeding the separated glass fibers and balsa wood into a drying system for drying treatment. By the adoption of the technical scheme that mechanical cutting and laser cutting are combined, the efficient and accurate cutting effect is achieved. Compared with a single mechanical cutting technology in the prior art, the wind power blades with different thicknesses and materials can be processed more flexibly.

Description

Technical Field

[0001] The invention relates to the technical field of waste recycling, and in particular to a process for crushing and sorting waste wind turbine blades. Background Art

[0002] With the rapid development of the wind power industry, the recycling and treatment of waste wind turbine blades has gradually become an environmental challenge that needs to be solved urgently. Wind turbine blades are made of composite materials such as glass fiber, balsa wood and resin, which have high strength and good durability, but these materials also make the treatment process of waste wind turbine blades extremely complicated. Existing recycling technologies mainly rely on mechanical crushing, incineration or landfilling, but these methods have many shortcomings and cannot effectively solve the problem of efficient recycling and reuse of waste wind turbine blades. Specifically, the existing technology still faces low processing efficiency, high cost, waste of resources and environmental problems in key links such as cutting, crushing, sorting and iron removal.

[0003] Existing cutting and splitting technologies are difficult to adapt to the complex materials and structures of waste wind turbine blades. Traditional mechanical cutting methods are usually not accurate enough, and are prone to uneven cutting and rapid tool wear when processing multi-layer composite materials. Although laser cutting technology has improved in accuracy, existing cutting methods are still unable to efficiently process wind turbine blades of different thicknesses and materials. The uneven size of the cut material will also affect the subsequent crushing and sorting effects, resulting in low production efficiency and increasing the complexity and cost of subsequent processing.

[0004] Secondly, although existing crushing equipment, such as single-shaft shredders and hammer crushers, can initially crush waste wind turbine blades, due to the singleness of the equipment and the limitations of processing capacity, there are often problems such as uneven crushing effect and high energy consumption. A single device cannot optimize the processing of different types of waste blades, resulting in low processing efficiency and the need for multiple crushing, which further increases energy consumption and time costs. In addition, the large or uneven particle size of the crushed material will also affect sorting and subsequent utilization, resulting in a low resource recovery rate and high energy consumption. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a waste wind turbine blade crushing and sorting process, which solves the problems of uneven crushing and low sorting accuracy in the existing waste wind turbine blade recycling and processing technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A waste wind turbine blade crushing and sorting process comprises the following steps:

[0007] Cutting / splitting the waste wind turbine blades;

[0008] The cut / split waste wind turbine blades are sent to a coarse crusher for coarse crushing;

[0009] The coarsely crushed materials are sent to the fine crusher for fine crushing;

[0010] The finely crushed material is fed into a pulverizer for pulverization;

[0011] Remove iron from the crushed materials;

[0012] Screening the crushed materials through screening equipment;

[0013] The screened materials are subjected to water flotation to separate the glass fiber and balsa wood;

[0014] The separated glass fiber and balsa wood are respectively sent to the drying system for drying.

[0015] Preferably, the coarse crusher is a double-shaft shredder, the fine crusher is a single-shaft shredder or a double-shaft shredder, the pulverizer is a hammer pulverizer, and both the double-shaft shredder and the single-shaft shredder are crushing equipment with blades and drums.

[0016] Preferably, the screening equipment is a vibrating screen or a cyclone separation fan, and the mesh aperture of the screening equipment can be adjusted according to the characteristics of the material to optimize the screening effect. The screened material can be divided into multiple particle size segments, among which the part containing larger particles further enters the fine crusher for processing, and the fine particles enter the water flotation stage after screening.

[0017] Preferably, the water flotation equipment is a trough-type circulating water pool, which has a sedimentation and filtration system, and the water flow in the pool is maintained to flow continuously through the circulation system, and the sediment can be discharged regularly through the automatic discharge system.

[0018] Preferably, the water flotation step can effectively separate the glass fiber from the balsa wood, and the separation process is achieved by adjusting the water flow rate, the amount of flotation agent added and the temperature of the water pool, so that the glass fiber and the balsa wood are effectively separated under the action of buoyancy.

[0019] Preferably, the cutting / splitting processing step is implemented by mechanical cutting or laser cutting, wherein mechanical cutting is performed by a multi-blade cutting device, and laser cutting uses a high-power laser beam to precisely cut the wind turbine blades.

[0020] Preferably, the drying system is a hot air drying system or an infrared drying system, and the drying system can adjust the drying rate under different temperature conditions to meet the drying requirements of different materials.

[0021] Preferably, the pulverizer, screening equipment and water flotation equipment used in the process are all equipped with an automatic control system, which can monitor the processing status of the material in real time and optimize the process flow by adjusting the working parameters of each device.

[0022] Preferably, the crushing, pulverizing, screening, flotation and drying steps are carried out in a closed system, and the closed system can prevent dust leakage and emission of harmful gases.

[0023] The equipment for the crushing and sorting process of waste wind turbine blades includes a cutting / splitting machine, a coarse crusher, a fine crusher, a pulverizer, an iron removal device, a screening device, a water flotation device and a drying system, and each device is connected by a conveying system. The equipment also includes an automatic control system, a closed system and an exhaust gas treatment device, which can realize automatic control and environmental protection treatment.

[0024] The present invention provides a process for crushing and sorting waste wind turbine blades. It has the following beneficial effects:

[0025] 1. The present invention adopts a technical solution combining mechanical cutting and laser cutting to achieve efficient and precise cutting effects. Compared with the single mechanical cutting technology in the prior art, the present invention can more flexibly handle wind turbine blades of different thicknesses and materials, avoiding the problems of uneven cutting or tool wear in traditional cutting methods. Through this technical solution, the present invention significantly improves cutting efficiency, reduces equipment wear, and reduces the difficulty of subsequent processing.

[0026] 2. The present invention uses a double-shaft shredder for coarse crushing and a single-shaft or double-shaft shredder for fine crushing, which can efficiently and evenly crush the waste wind turbine blades into small particles. Compared with the solution of using a single crushing device in the prior art, the present invention ensures the consistency and efficiency of the crushing effect through precise equipment configuration, avoiding the problems of uneven crushing and excessive energy consumption in traditional methods. This technical solution not only improves the processing efficiency, but also provides high-quality raw materials for subsequent crushing and sorting.

[0027] 3. The present invention uses a trough-type circulating water pool for water flotation separation, and combines hot air and infrared drying technology to dry the materials, achieving efficient and environmentally friendly sorting and drying effects. Compared with the prior art solutions with poor sorting effects and uneven drying, the water flotation of the present invention can accurately separate glass fiber and balsa wood, and water resources are efficiently utilized; the drying technology ensures uniform drying of the materials, avoiding the problem of over-drying or under-drying of the materials. This technical solution improves the efficiency of sorting and drying, saves energy and protects the environment, and improves the economy and sustainability of waste recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a process flow chart of the present invention;

[0029] Figure 2 It is the process principle diagram of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Please see attached Figure 1 - Attachment Figure 2 :

[0032] Cutting and segmenting of waste wind turbine blades

[0033] Because discarded wind turbine blades are hard and large in size, they need to be cut and split first so that the subsequent crushing and sorting processes can proceed smoothly.

[0034] Cutting / splitting method:

[0035] Mechanical cutting: Wind turbine blades are cut by a multi-blade cutting device. The multi-blade system sets multiple high-efficiency blades side by side with a fixed gap to perform customized cutting according to the material and thickness of the wind turbine blades. The blades can adjust the cutting angle and depth according to the needs to ensure the stability and uniformity of the cutting process.

[0036] Laser cutting: For some thicker and more complex wind turbine blades, high-power laser cutting technology is used. Laser cutting can achieve non-contact cutting through precise focusing of high-energy laser beams, avoiding physical damage that may be caused by mechanical cutting.

[0037] The goal of this step is to cut the large-sized waste wind turbine blades into small pieces suitable for subsequent processing so as to facilitate entry into the crushing equipment.

[0038] Coarse crushing

[0039] The cut waste wind turbine blades are sent to the coarse crusher. The main purpose of this stage is to initially crush the cut materials into smaller pieces.

[0040] Equipment selection and working principle:

[0041] Double-shaft shredder: A double-shaft shredder is used for preliminary shredding in the coarse shredding stage. The double-shaft shredder consists of two shafts rotating side by side, each shaft is equipped with multiple blades, and the shearing action of the rotating blades tears the waste wind turbine blades into pieces of varying sizes. The speed of the double-shaft shredder is adjustable, and the shredding strength can be adjusted according to the characteristics of the material, ensuring that the material is coarsely shredded with high efficiency.

[0042] Crushing principle: The blades of the double-shaft shredder rotate rapidly along the axis, colliding and rubbing against the material, tearing the material into smaller pieces through shearing and tearing forces. The size of the material is determined by the setting of the blade gap and the speed control.

[0043] The coarsely crushed material will enter the fine crushing stage to further reduce the particle size.

[0044] Fine crushing

[0045] The fine crushing stage further crushes the coarsely crushed materials, with the goal of further reducing the particle size of the materials in preparation for subsequent crushing, screening and sorting.

[0046] Equipment selection and working principle:

[0047] Single shaft shredder or double shaft shredder: In the fine crushing stage, a single shaft shredder or double shaft shredder is used. Single shaft shredders are usually suitable for occasions that require higher particle size uniformity, and they crush the material by contacting the material with a set of rotating blades. Double shaft shredders are suitable for handling larger loads and can handle harder materials. By adjusting the speed and blade design, the fine shredder can break the coarse crushed material into smaller particles for the comminution stage.

[0048] Crushing principle: The rotating blades of a single-shaft or double-shaft shredder tear and crush the material through shearing action, making large particles of material smaller. By controlling the rotation speed and feed rate, the crushing effect and material particle size can be adjusted.

[0049] The finely crushed material is ready to enter the comminution stage with smaller and more uniform particle size, suitable for further comminution.

[0050] Crushing

[0051] The crushing stage further refines the finely crushed materials, with the goal of crushing the materials into powder or flocs for subsequent sorting and recycling.

[0052] Equipment selection and working principle:

[0053] Hammer mill: In the crushing process, a hammer mill is used. This equipment uses high-speed rotating hammers to impact, shear and squeeze the materials, and uses the impact force to crush the materials into smaller particles. Hammer mills are particularly suitable for processing complex composite materials in wind turbine blades, and can effectively crush large particles into powder or fine particles.

[0054] Crushing principle: The material enters the crushing chamber through the feed port, the rotating hammer exerts impact force on the material, and generates shear force through collision with the fixed liner, and finally crushes the material. The crushing effect and particle size can be controlled by adjusting the rotation speed, the number of hammers and the material feed speed.

[0055] The crushed material will enter the iron removal stage to remove possible metal impurities.

[0056] Iron removal

[0057] The main purpose of the iron removal stage is to remove metal impurities (such as iron wire, steel bars, etc.) generated during the crushing process to prevent these impurities from affecting subsequent screening and sorting steps.

[0058] Equipment selection and working principle:

[0059] Electromagnetic iron removal equipment: Through electromagnetic iron removal equipment, the strong magnetic field generated by the electromagnet is used to absorb the metal impurities. The strength of the electromagnet can be adjusted according to the amount of impurities in the material to ensure that all metal substances that may affect the sorting are removed.

[0060] Working principle: The electromagnetic iron removal equipment excites the electromagnet through electric current to generate a magnetic field. When the material passes through the equipment, the metal material will be adsorbed to the surface of the electromagnet, and the non-metallic part will continue to flow, ultimately achieving the purpose of removing impurities.

[0061] The material after iron removal enters the screening stage.

[0062] Screening

[0063] The screening process mainly sorts the crushed materials according to the particle size so that materials of different particle sizes can enter different processing stages. The screened materials will be subjected to water flotation to separate glass fiber and balsa wood.

[0064] Equipment selection and working principle:

[0065] Vibrating screen: Vibrating screen is a common device for screening materials. Through the up and down or horizontal vibration of the vibrating screen, the materials are classified according to the particle size. The mesh size of the vibrating screen can be adjusted according to the characteristics of the material and the particle size to be screened, so as to ensure the screening effect.

[0066] Cyclone separation fan: This equipment uses the centrifugal force of the airflow to separate materials of different particle sizes. It is suitable for processing relatively loose materials. Cyclone separation fans are usually used in conjunction with vibrating screens to separate large particles from fine particles.

[0067] The screened materials will enter the water flotation stage to separate the glass fiber and balsa wood.

[0068] Water flotation

[0069] Water flotation is a key separation step in the present invention, which is used to separate glass fiber and balsa wood. The process achieves effective separation by adjusting parameters such as water flow rate, amount of flotation agent used, temperature, etc., and utilizing buoyancy differences.

[0070] Equipment selection and working principle:

[0071] Trough type circulating water pool: The water in the trough type water pool flows through the circulation system. Through the action of the flotation agent, the glass fiber will float on the water surface due to its lower density, while the balsa wood will sink to the bottom of the pool due to its higher density.

[0072] Flotation principle: The speed of the water flow in the pool, the type of flotation agent and the temperature of the pool can be adjusted according to the specific material to ensure the best separation effect. During the flotation process, the glass fiber is brought to the surface of the water by buoyancy, while the balsa wood is separated to the bottom by sedimentation.

[0073] The separated glass fiber and balsa wood are sent to the drying system for processing.

[0074] dry

[0075] The separated fiberglass and balsa wood need to be dried to remove moisture and prepare for subsequent reuse.

[0076] Equipment selection and working principle:

[0077] Hot air drying system: Hot air drying heats the air to evaporate the moisture in the material. The temperature, humidity and air flow speed in the system are adjustable to meet the drying requirements of different materials.

[0078] Infrared drying system: Infrared rays heat the material through direct radiation heat, causing its moisture to evaporate. It is suitable for materials that require shorter drying time and higher efficiency.

[0079] The dried material can be further recycled or utilized.

[0080] Comprehensive consideration

[0081] The present invention realizes efficient crushing, sorting and resource utilization of waste wind turbine blades through precise process flow and efficient equipment configuration. The fine control of each link ensures the efficiency, environmental protection and economy of the whole process, and the process can adapt to the processing requirements of different types of wind turbine blades.

[0082] Example 1: Processing technology of waste wind turbine blades based on mechanical cutting and double-shaft shredder

[0083] Step 1: Cutting and segmenting of waste wind turbine blades

[0084] Process description: The waste wind turbine blades are initially cut by mechanical cutting machines and laser cutting equipment. Mechanical cutting is used to cut larger parts, and laser cutting is used to finely cut smaller parts.

[0085] Process parameters:

[0086] Mechanical cutting machine cutting speed: 50m / min

[0087] Laser cutting power: 500W

[0088] Laser cutting accuracy: ±1mm

[0089] Cutting depth: 10mm

[0090] Material size after cutting: 300mm×300mm

[0091] Step 2: Coarse crushing

[0092] Process description: After cutting, the waste wind turbine blades enter the double-shaft shredder for coarse crushing. The double-shaft shredder has a strong shearing effect and can tear large pieces of material into smaller pieces.

[0093] Process parameters:

[0094] Double shaft shredder speed: 80rpm

[0095] Number of blades: 12

[0096] Number of leaves processed each time: 50-100kg

[0097] Material size after crushing: ≤50mm

[0098] Step 3: Fine crushing

[0099] Process description: The coarsely crushed material enters the single-shaft shredder for fine crushing, which further breaks the material into smaller particles and prepares for the comminution stage.

[0100] Process parameters:

[0101] Single shaft shredder speed: 100rpm

[0102] Number of blades: 8

[0103] Number of leaves processed each time: 40-80kg

[0104] Material size after crushing: ≤20mm

[0105] Step 4: Crushing

[0106] Process description: The finely crushed material enters the hammer mill for crushing and refinement into powder or flocculent material, which is convenient for subsequent screening and sorting.

[0107] Process parameters:

[0108] Hammer mill speed: 1200rpm

[0109] Number of hammer heads: 10

[0110] Particle size of crushed material: ≤5mm

[0111] Step 5: Iron Removal

[0112] Process description: The crushed material passes through the electromagnetic iron removal equipment to remove iron impurities and ensure the purity of the material.

[0113] Process parameters:

[0114] Magnetic field strength of electromagnetic iron remover: 3000Gauss

[0115] Processing capacity: 200kg / h

[0116] Iron impurity removal rate: >98%

[0117] Step 6: Screening and sorting

[0118] Process description: Materials are screened by vibrating screen and cyclone separation fan to separate materials of different particle sizes.

[0119] Process parameters:

[0120] Vibrating screen frequency: 50Hz

[0121] Cyclone separation fan speed: 15m / s

[0122] Material size after screening: ≥0.5mm

[0123] Step 7: Water Flotation and Drying

[0124] Process description: Water flotation is performed in a trough-type circulating water tank to separate glass fiber and balsa wood, and then the separated materials are dried by a combination of hot air drying and infrared drying.

[0125] Process parameters:

[0126] Water flow velocity in water flotation tank: 0.2m / s

[0127] Flotation agent dosage: 5-10g / L

[0128] Hot air drying temperature: 70℃

[0129] Infrared drying temperature: 60℃

[0130] Drying time: 3 hours

[0131] Example 2: Processing technology of waste wind turbine blades based on laser cutting and dual-shaft shredder

[0132] Step 1: Cutting and segmenting of waste wind turbine blades

[0133] Process description: Waste wind turbine blades are cut with high precision using a laser cutting machine, which is particularly suitable for processing composite blades with complex structures.

[0134] Process parameters:

[0135] Laser cutting power: 800W

[0136] Laser cutting accuracy: ±0.5mm

[0137] Cutting speed: 40m / min

[0138] Cutting depth: 20mm

[0139] Step 2: Coarse crushing

[0140] Process description: The cut materials enter the double-shaft shredder for preliminary coarse crushing to ensure that large pieces of waste are torn into smaller particles.

[0141] Process parameters:

[0142] Double shaft shredder speed: 75rpm

[0143] Number of leaves processed each time: 60-120kg

[0144] Material size after crushing: ≤60mm

[0145] Step 3: Fine crushing

[0146] Process description: The coarsely crushed materials enter the double-shaft shredder for secondary crushing to refine the materials into particles suitable for crushing.

[0147] Process parameters:

[0148] Double shaft shredder speed: 95rpm

[0149] Number of blades: 10

[0150] Material size after crushing: ≤30mm

[0151] Step 4: Crushing

[0152] Process description: The finely crushed material is fed into a hammer mill, where it is crushed into powder through strong impact and shearing.

[0153] Process parameters:

[0154] Hammer mill speed: 1500rpm

[0155] Number of hammer heads: 12

[0156] Particle size of crushed material: ≤3mm

[0157] Step 5: Iron Removal

[0158] Process description: Use electromagnetic iron removal equipment to remove iron impurities in the material to prevent it from affecting screening and sorting.

[0159] Process parameters:

[0160] Magnetic field strength of electromagnetic iron remover: 3500Gauss

[0161] Processing capacity: 250kg / h

[0162] Iron impurity removal rate: >99%

[0163] Step 6: Screening and sorting

[0164] Process description: Use a combination of a vibrating screen and a cyclone separation fan for screening to ensure accurate sorting of materials of different particle sizes.

[0165] Process parameters:

[0166] Vibrating screen frequency: 55Hz

[0167] Cyclone separation fan speed: 18m / s

[0168] Material size after screening: ≥0.3mm

[0169] Step 7: Water Flotation and Drying

[0170] Process description: Utilize a trough-type circulating water pool for water flotation separation to effectively separate the glass fiber and balsa wood, and then use a combination of hot air drying and infrared drying to dry the separated materials.

[0171] Process parameters:

[0172] Water flow velocity in water flotation tank: 0.25m / s

[0173] Flotation agent dosage: 7g / L

[0174] Hot air drying temperature: 75°C

[0175] Infrared drying temperature: 65°C

[0176] Drying time: 2.5 hours

[0177] Example 3: Processing technology of waste wind turbine blades based on mechanical cutting and water flotation

[0178] Step 1: Cutting and segmenting of waste wind turbine blades

[0179] Process description: Waste wind turbine blades are initially cut by mechanical cutting equipment, which is particularly suitable for processing larger wind turbine blades to reduce the difficulty of subsequent crushing.

[0180] Process parameters:

[0181] Cutting machine speed: 45m / min

[0182] Cutting depth: 15mm

[0183] Material size after cutting: 500mm×500mm

[0184] Step 2: Coarse crushing

[0185] Process description: The cut waste wind turbine blades enter the double-shaft shredder for coarse crushing to ensure that large pieces of material are effectively torn apart.

[0186] Process parameters:

[0187] Double shaft shredder speed: 85rpm

[0188] Number of blades: 10

[0189] Processing capacity: 80-150kg / time

[0190] Material size after crushing: ≤70mm

[0191] Step 3: Fine crushing

[0192] Process description: The coarsely crushed material is sent to the single-shaft shredder for fine crushing to further reduce the particle size of the material in preparation for subsequent crushing.

[0193] Process parameters:

[0194] Single shaft shredder speed: 100rpm

[0195] Material processed each time: 60-120kg

[0196] Material size after crushing: ≤40mm

[0197] Step 4: Crushing

[0198] Process description: The finely crushed material enters the hammer mill for further crushing to obtain smaller particles and powdery materials.

[0199] Process parameters:

[0200] Hammer mill speed: 1300rpm

[0201] Number of hammer heads: 10

[0202] Particle size of crushed material: ≤4mm

[0203] Step 5: Iron Removal

[0204] Process description: Use electromagnetic iron removal equipment to remove iron impurities in the crushed material to ensure the purity of the material.

[0205] Process parameters:

[0206] Magnetic field strength of electromagnetic iron remover: 3200Gauss

[0207] Processing capacity: 150kg / h

[0208] Iron impurity removal rate: >99%

[0209] Step 6: Screening and Water Flotation

[0210] Process description: The material is screened by a vibrating screen and then water flotation is performed in a trough-type circulating water tank to separate the glass fiber and balsa wood.

[0211] Process parameters:

[0212] Vibrating screen frequency: 45Hz

[0213] Water flow velocity in water flotation tank: 0.3m / s

[0214] Flotation agent dosage: 6g / L

[0215] Flotation effect: separation rate of glass fiber and balsa wood>98%

[0216] Step 7: Drying

[0217] Process description: The separated glass fiber and balsa wood materials are dried by combining hot air drying and infrared drying.

[0218] Process parameters:

[0219] Hot air drying temperature: 80℃

[0220] Infrared drying temperature: 70℃

[0221] Drying time: 3 hours.

[0222] Summarize

[0223] The present invention proposes an efficient and environmentally friendly waste wind turbine blade crushing and sorting process. Aiming at the technical challenges faced in wind turbine blade recycling, the present invention significantly improves the processing efficiency and sorting accuracy by optimizing multiple key process links. Specifically, the present invention combines cutting, crushing, pulverizing, screening, iron removal, water flotation and drying and other technical means to form a complete waste wind turbine blade recycling process.

[0224] Through the implementation of the present invention, we have achieved the following important innovations and advantages:

[0225] Efficient cutting and crushing: The combination of mechanical cutting and laser cutting can not only improve the cutting accuracy, but also meet the processing requirements of different wind turbine blade materials. The combination of double-shaft shredder and single-shaft shredder makes the crushing of waste wind turbine blades more uniform and efficient, avoiding the problems of incomplete processing and excessive energy consumption common in traditional crushing methods.

[0226] Accurate sorting and iron removal: Through the cooperation of vibrating screen, cyclone separation fan and water flotation technology, different types of materials can be effectively separated, especially glass fiber and balsa wood, ensuring the purity and utilization rate of materials. In addition, electromagnetic iron removal technology can efficiently remove iron impurities, reduce the impact on subsequent processing, and improve the quality of materials.

[0227] Environmental protection and energy saving: This invention solves the problem of water waste and reduces energy consumption through optimized water flotation and drying technology. The water flotation adopts a trough-type circulating water pool to effectively reduce water loss, while the drying process improves the drying efficiency by combining hot air and infrared, while ensuring uniform drying of the material.

[0228] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for crushing and sorting waste wind turbine blades, characterized in that: The steps include: Cutting / splitting the waste wind turbine blades; The cut / split waste wind turbine blades are sent to a coarse crusher for coarse crushing; The coarsely crushed materials are sent to the fine crusher for fine crushing; The finely crushed material is fed into a pulverizer for pulverization; Remove iron from the crushed materials; Screening the crushed materials through screening equipment; The screened materials are subjected to water flotation to separate the glass fiber and balsa wood; The separated glass fiber and balsa wood are respectively sent to the drying system for drying.

2. A waste wind turbine blade crushing and sorting process according to claim 1, characterized in that: The coarse crusher is a double-shaft shredder, the fine crusher is a single-shaft shredder or a double-shaft shredder, the pulverizer is a hammer pulverizer, and both the double-shaft shredder and the single-shaft shredder are pulverizing devices with blades and rollers.

3. The waste wind turbine blade crushing and sorting process according to claim 1 is characterized in that: The screening equipment is a vibrating screen or a cyclone separation fan, and the mesh aperture of the screening equipment can be adjusted according to the characteristics of the material to optimize the screening effect. The screened material can be divided into multiple particle size segments, among which the part containing larger particles further enters the fine crusher for processing, and the fine particles enter the water flotation stage after screening.

4. A waste wind turbine blade crushing and sorting process according to claim 1, characterized in that: The water flotation equipment is a trough-type circulating water pool, which has a sedimentation and filtration system. The water flow in the pool is kept flowing continuously through the circulation system, and the sediment can be discharged regularly through the automatic discharge system.

5. The waste wind turbine blade crushing and sorting process according to claim 1 is characterized in that: The water flotation step can effectively separate the glass fiber from the balsa wood. The separation process is achieved by adjusting the water flow rate, the amount of flotation agent added and the temperature of the water pool, so that the glass fiber and the balsa wood are effectively separated under the action of buoyancy.

6. The waste wind turbine blade crushing and sorting process according to claim 1 is characterized in that: The cutting / splitting process is achieved by mechanical cutting or laser cutting, wherein the mechanical cutting is performed by a multi-blade cutting device, and the laser cutting is performed by accurately cutting the wind turbine blades by a high-power laser beam.

7. The waste wind turbine blade crushing and sorting process according to claim 1 is characterized in that: The drying system is a hot air drying system or an infrared drying system, and the drying system can adjust the drying rate under different temperature conditions to meet the drying requirements of different materials.

8. The waste wind turbine blade crushing and sorting process according to claim 1 is characterized in that: The pulverizer, screening equipment and water flotation equipment used in the process are all equipped with an automatic control system, which can monitor the processing status of the materials in real time and optimize the process flow by adjusting the working parameters of each device.

9. The waste wind turbine blade crushing and sorting process according to claim 1, characterized in that: The crushing, pulverizing, screening, flotation and drying steps are carried out in a closed system, and the closed system can prevent dust leakage and emission of harmful gases.

10. Equipment for the crushing and sorting process of waste wind turbine blades, according to a process for crushing and sorting waste wind turbine blades according to claims 1-9, characterized in that: The equipment includes a cutting / splitting machine, a coarse crusher, a fine crusher, a pulverizer, an iron removal device, a screening device, a water flotation device and a drying system, and each device is connected by a conveying system. The equipment also includes an automatic control system, a closed system and an exhaust gas treatment device, which can realize automatic control and environmental protection treatment.

Images