A wind turbine blade material degradation and recycling device

Abstract

The invention discloses a wind turbine blade material degradation and recycling device in the technical field of wind turbine blade recycling, comprising a preheating tank and a Stirling engine, wherein the inner wall of the preheating tank is provided with a preheating chamber; the input end of the Stirling engine is connected with the preheating chamber, and the output end of the Stirling engine is provided with a crushing mechanism for crushing the wind turbine blades; a wind selection mechanism for screening wind turbine blade fragments is provided below the preheating tank, the wind selection mechanism comprises a base, a wind selection channel and a wind selection chamber are provided in the base, a recovery plate is provided in the wind selection chamber, a plurality of screening holes are provided on the recovery plate, and the screening holes are successively reduced in order from top to bottom; a fan is provided on the side of the recovery plate away from the wind selection channel, a heating chamber is further provided below the recovery plate, and an insulating mechanism for sealing the heating chamber is provided between the heating chamber and the recovery plate; the reuse rate of heat energy is improved by the Stirling engine and the wind selection mechanism, the wind turbine blades are preheated, and the processing efficiency of the blades is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbine blade recycling, and in particular relates to a wind turbine blade material degradation and recycling device. Background Art

[0002] As wind turbine blades are widely used, the number of retired blades is also increasing. These blades are usually made of composite materials, including epoxy resin and glass fiber or carbon fiber, which remain strong and difficult to recycle after reaching their design life.

[0003] Traditional high-temperature thermal decomposition technology mainly decomposes the polymer matrix in the blades through thermochemical reactions to release the high-value fiber materials, but it has the disadvantages of high energy consumption and low heat utilization. Therefore, a wind turbine blade recycling device with high heat utilization rate is provided to achieve the reuse of heat energy. Summary of the invention

[0004] The purpose of the present invention is to provide a wind turbine blade material degradation and recovery device to improve the reuse rate of heat energy and improve the blade processing efficiency.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A wind turbine blade material degradation and recycling device comprises a preheating tank and a Stirling engine, wherein the inner wall of the preheating tank is provided with a preheating cavity, and the preheating cavity is connected with the preheating tank;

[0007] The Stirling engine is fixedly connected to the preheating tank, and the input end of the Stirling engine is connected to the preheating chamber, and the output end of the Stirling engine is provided with a crushing mechanism for crushing wind turbine blades;

[0008] The crushing mechanism comprises a roller body coaxially fixedly connected to the output shaft of the Stirling engine, and a plurality of protrusions are fixedly connected to the roller body;

[0009] A wind selection mechanism for screening wind turbine blade fragments is provided below the preheating tank. The wind selection mechanism includes a base, a wind selection channel and a wind selection chamber are provided in the base, a recovery plate is provided in the wind selection chamber, a plurality of screening holes are provided on the recovery plate, and the plurality of screening holes on the recovery plate are reduced in order from top to bottom;

[0010] A fan is arranged on one side of the recovery plate away from the wind selection channel, a heating chamber is arranged below the recovery plate, and an isolation mechanism for closing the heating chamber is arranged between the heating chamber and the recovery plate.

[0011] The following beneficial effects are achieved by adopting the above scheme: the blades are pre-treated by the heat generated during the preheating process, and at the same time a power source is provided for the Stirling engine, so that the crushing mechanism drives the protrusions of the roller to crush the wind turbine blades. Compared with the existing technology, the volatilization of external heat is reduced to improve resource utilization.

[0012] The wind force generated by the fan is used to absorb fragments of different sizes so as to achieve accumulation of fragments of different sizes. The wind force of the fan is used to gather and heat the fragments of different sizes, thereby improving the reuse rate of heat energy and increasing the overall decomposition rate of the fragments compared with the existing heating method.

[0013] Furthermore, a circulation chamber is provided on the side of the preheating tank away from the Stirling engine, and the roller body is coaxially fixedly connected to a rotating roller, and a plurality of closing plates are fixedly connected to the rotating roller, and the closing plates are used to divide the circulation chamber into a plurality of circulation chambers;

[0014] The circulation chamber is communicated with the preheating chamber, and the circulation chamber is also communicated with a connecting pipe, and one end of the connecting pipe away from the circulation chamber is communicated with the heating chamber.

[0015] Beneficial effect: The high-temperature gas in the Stirling engine and the connecting pipe is injected into the circulation chamber to drive the closing plate to move in the circulation chamber, thereby pushing the roller body to perform auxiliary rotation to increase the power output.

[0016] Furthermore, a plurality of crushing teeth are fixedly connected to the inner wall of the preheating tank, and the protrusions and the crushing teeth are arranged in a staggered manner.

[0017] Beneficial effect: The double crushing of the protrusions and crushing teeth can improve the crushing effect on the wind turbine blades.

[0018] Furthermore, a magnet block is provided in the air selection channel, and the magnet block is slidably matched with the base. A spring and a switch are fixedly connected between the magnet block and the base. The switch is electrically connected to the fan and the isolation mechanism. When the magnet block moves to the lowest point, the magnet block and the switch are against each other.

[0019] Beneficial effect: The magnet block presses the switch to control the start-up of the fan and the isolation mechanism, so as to realize automatic control.

[0020] Furthermore, the isolation mechanism includes a second motor and a cleaning plate, the output end of the second motor is coaxially fixedly connected with a driving gear, the driving gear is meshed with a rack, an isolation plate is fixedly connected to the rack, protrusions are fixedly connected to both sides of the isolation plate, and a slide groove is opened on the base and the heating chamber, and the protrusion is located in the slide groove;

[0021] The cleaning plate is located below the magnet block, and the cleaning plate is slidably matched with the base and the heating chamber. When the isolation plate moves to the farthest point, the rack abuts against the cleaning plate.

[0022] Beneficial effects: The cleaning plate is driven to move by the second motor to achieve sealing and communication of the heating chamber, and the cleaning plate can be pushed out to facilitate cleaning and recovery of iron filings adsorbed inside.

[0023] Furthermore, a plurality of partitions are fixedly connected under the recovery plate, and the partitions are located between screening holes of different sizes.

[0024] Beneficial effect: fragments of different diameters are guided by the partition to form a pile of fragments of different sizes, which is convenient for subsequent heating according to the fragments of different diameters.

[0025] Furthermore, the fan and the base are rotatably matched, and a gear is coaxially fixedly connected to the input end of the fan, and the diameter of the gear increases in sequence from top to bottom;

[0026] A first motor is also fixedly connected above the rack, and an output shaft of the first motor is fixedly connected to a driving wheel. The driving wheel is connected to a plurality of transmission gears through a belt. The transmission gears are respectively meshed with the gears, and the diameters of the transmission gears are consistent.

[0027] Beneficial effect: The first motor drives the fan to rotate through the drive of the belt and the transmission gear to form wind forces of different sizes to absorb fragments of different diameters, so as to separate the fallen fragments again.

[0028] Furthermore, a feed port is provided on the top of the preheating tank, a discharge port is provided on the side of the heating chamber close to the Ster engine, and the feed port and the discharge port are provided with sealing doors for sealing the feed port and the discharge port.

[0029] Beneficial effect: The setting of the feed port and the discharge port makes it easy to add wind turbine blades or discharge processed wind turbine blades.

[0030] Furthermore, a one-way valve is provided in the connecting pipe, and the one-way valve can only allow the air in the heating chamber to flow into the circulation chamber.

[0031] Beneficial effect: The one-way valve is set to prevent the high-temperature gas from flowing back, so as to promote the internal gas circulation.

[0032] Furthermore, a plurality of ventilation holes are provided on the top of the recovery plate and the partition plate, and the fan is connected with the air selection channel through the ventilation holes, and the diameter of the ventilation holes is smaller than the diameter of the fan.

[0033] Beneficial effect: The lateral airflow and the airflow formed along the surface of the recovery plate are formed through different vents, so as to drive the fragments to move on the recovery plate and separate the fallen fragments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an axonometric diagram of a wind turbine blade material degradation and recycling device according to an embodiment of the present invention.

[0035] Figure 2 It is a cross-sectional view of a wind turbine blade material degradation and recycling device according to an embodiment of the present invention.

[0036] Figure 3 for Figure 1 Schematic diagram of the base.

[0037] Figure 4 for Figure 3 Bottom view of .

[0038] Figure 5 for Figure 3 Schematic diagram of the fan.

[0039] Figure 6 for Figure 3 sectional view of .

[0040] Figure 7 for Figure 3 Schematic diagram of the recovery board.

[0041] Figure 8 for Figure 1 Side view of .

[0042] Fig. 9 for Figure 2 An enlarged view of part A.

[0043] Fig.10 for Figure 2 Schematic diagram of the circulation chamber. DETAILED DESCRIPTION

[0044] The following is further described in detail through specific implementation methods:

[0045] The figure marks in the drawings of the specification include: preheating tank 1, roller body 11, feed port 12, connecting pipe 13, Stirling engine 2, base 3, connecting hole 30, fan 31, recovery plate 32, screening hole 33, partition 34, heating chamber 4, gear 5, first motor 51, belt 52, connecting gear 53, circulation chamber 6, closing plate 61, second motor 7, isolation plate 71, cleaning plate 72, magnet block 8, spring 81, switch 82.

[0046] The embodiment is basically as shown in the attached Figures 1 to 10 As shown: a wind turbine blade material degradation and recycling equipment, including a preheating tank 1 and a Stirling engine 2, the inner wall of the preheating tank 1 is provided with a preheating cavity, and the preheating cavity is connected with the preheating tank 1; the preheating tank 1 is also provided with a circulation chamber 6 on the side away from the Stirling engine 2, the roller body 11 is also coaxially fixedly connected with a rotating roller, and a plurality of closing plates 61 are welded on the rotating roller, and the closing plates 61 are used to divide the circulation chamber 6 into a plurality of circulation cavities; the circulation cavity is connected with the preheating cavity, and the circulation cavity is also connected with a connecting pipe 13, and the end of the connecting pipe 13 away from the circulation cavity is connected with the heating chamber 4, and there is also a one-way valve in the connecting pipe 13, and the one-way valve can only allow the air in the heating chamber 4 to flow into the circulation cavity.

[0047] The Stirling engine 2 is fixedly connected to the preheating tank 1 by bolts, and the input end of the Stirling engine 2 is connected to the preheating chamber. The output end of the Stirling engine 2 is provided with a crushing mechanism for crushing wind turbine blades; the crushing mechanism includes a roller body 11 coaxially fixedly connected to the Stirling engine 2, a plurality of protrusions are welded on the roller body 11, and a plurality of crushing teeth are welded on the inner wall of the preheating tank 1, and the protrusions and the crushing teeth are arranged in a staggered manner.

[0048] A wind selection mechanism for screening wind turbine blade fragments is provided below the preheating tank 1. The wind selection mechanism includes a base 3, which is fixedly connected to the preheating tank 1. A wind selection channel and a wind selection chamber are provided in the base 3. A recovery plate 32 is provided in the wind selection chamber. A plurality of screening holes 33 are provided on the recovery plate 32, and the screening holes 33 are successively reduced in size from top to bottom.

[0049] A magnet block 8 is also provided in the air selection channel, and the magnet block 8 is slidably matched with the base 3. A spring 81 (not shown in the figure) and a switch 82 are clamped between the magnet block 8 and the base 3. The switch 82 is electrically connected to the fan 31 and the isolation mechanism. When the magnet block 8 moves to the lowest point, the magnet block 8 and the switch 82 are against each other.

[0050] A fan 31 is provided on the side of the recovery plate 32 away from the air selection channel, and a heating chamber 4 is further provided below the recovery plate 32. An isolation mechanism for closing the heating chamber 4 is provided between the heating chamber 4 and the recovery plate 32, and the isolation mechanism includes a second motor 7 and a cleaning plate 72. A driving gear 5 is coaxially welded to the output end of the second motor 7, and a rack is meshed with the driving gear 5. An isolation plate 71 is welded on the rack, and protrusions are welded on both sides of the isolation plate 71. Slide grooves are provided on the base 3 and the heating chamber 4, and the protrusions are located in the slide grooves; and the cleaning plate 72 is located below the magnet block 8, and the cleaning plate 72 is slidably matched with the base 3 and the heating chamber 4. When the isolation plate 71 moves to the farthest point, the rack and the cleaning plate 72 are against each other.

[0051] A plurality of partitions 34 are welded under the recovery plate 32 , and the partitions 34 are located between screening holes 33 of different sizes. A plurality of vents are also provided on the top of the recovery plate 32 and the partitions 34 , and the fan 31 is connected to the air selection channel through the vents, and the diameter of the vents is smaller than the diameter of the fan 31 .

[0052] The fan 31 rotates with the base 3, and the input end of the fan 31 is coaxially fixedly connected with a gear 5, and the diameter of the gear 5 increases sequentially from top to bottom; a first motor 51 is also provided above the rack, and the first motor 51 is fixedly connected to the base 3 with bolts, and a driving wheel is clamped on the output shaft of the first motor 51, and the driving wheel is connected to a plurality of transmission gears 5 through a belt 52, and the transmission gears 5 are respectively meshed with the gears 5, and the transmission gears 5 rotate with the base 3, and the diameters of each transmission gear 5 are consistent.

[0053] A feed port 12 is provided on the top of the preheating tank 1, a discharge port is provided on the side of the heating chamber 4 close to the Sterling engine, and sealing doors for sealing the feed port 12 and the discharge port are provided at the feed port 12 and the discharge port.

[0054] The specific implementation process is as follows:

[0055] During the processing, the heat generated by the heating chamber 4 is used to preheat the preheating tank 1, and the wind turbine blades put into the preheating tank 1 are preheated, so that the wind turbine blades can reach the thermal degradation temperature in advance later, and the preheating is utilized to improve the reuse rate of thermal energy; at the same time, a power source is provided for heating the Stirling engine 2, and a power source is provided for the rotation of the crushing mechanism; during the high-temperature gas injection process, the closing plate 61 divides the circulation chamber 6 into several circulation chambers, and the high-temperature gas flows in one direction through the restriction of the one-way valve, so that the internal pressure of the circulation chamber is increased instantaneously, so as to assist in pushing the closing plate 61 to move in the circulation chamber 6, thereby pushing the roller body 11 to perform auxiliary rotation to increase the power output, and the increase in pressure facilitates the high-temperature gas to enter the preheating tank 1.

[0056] The wind turbine blades are crushed by the protrusions and crushing teeth to improve the crushing effect of the wind turbine blades. The generated fragments are then continuously rotated by the roller body 11 and the suction generated by the fan 31 to enter the air selection channel; the fragments move along the surface of the recovery plate 32, and fall into the heating chamber 4 through the screening holes 33 of different sizes. The fragments of different diameters are guided by the partition 34 to form a pile of fragments of different sizes. At the same time, the fallen fragments are moved again by the lateral wind force generated by the fan 31. Due to the filtration of the screening holes 33, the size of the fragments is consistent within a certain range, so the uniformity (weight) of the fragments is roughly consistent. The fragments are moved toward the side of the fan 31, and the falling fragments are reduced to disperse to form a pile of fragments. The concentrated wind force generated by the fan 31 drives the heat to enter the heating chamber 4 along the surface of the recovery plate 32 to heat the fragments, so that the heat is contacted in sequence according to the size distribution of the fragments, so as to achieve uniform heating of fragments of different sizes, so as to facilitate thermal degradation.

[0057] At the same time, when the fragments pass through the magnet block 8 of the wind selection channel, the magnet block 8 adsorbs the magnetic metal in the fragments to determine whether the adsorption amount on the magnet block 8 at the current time exceeds the elastic force of the spring 81, and the magnet block 8 presses the switch 82 to control the start of the fan 31 and the isolation mechanism to control the processing flow, so as to facilitate the cleaning of the magnetic metal on the magnet block 8, and at the same time control the fragments accumulated in the heating chamber 4 to achieve phased processing, so that the preheating tank 1 and the heating chamber 4 are processed separately, so that the wind turbine blades have enough time to be preheated, thereby improving the reuse rate of thermal energy and improving the processing efficiency of the blades.

[0058] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A wind turbine blade material degradation and recycling device, characterized by: It includes a preheating tank and a Stirling engine. The inner wall of the preheating tank is provided with a preheating cavity, which is connected to the preheating tank. The preheating tank is also provided with a circulation chamber on the side away from the Stirling engine. The roller body is also coaxially fixedly connected with a rotating roller, and a plurality of closing plates are fixedly connected to the rotating roller. The closing plates are used to divide the circulation chamber into a plurality of circulation cavities, which are connected to the preheating cavity. The Stirling engine is fixedly connected to the preheating tank, and the input end of the Stirling engine is connected to the preheating chamber, and the output end of the Stirling engine is provided with a crushing mechanism for crushing wind turbine blades; The crushing mechanism comprises a roller body coaxially fixedly connected to the output shaft of the Stirling engine, and a plurality of protrusions are fixedly connected to the roller body; A wind selection mechanism for screening wind turbine blade fragments is provided below the preheating tank. The wind selection mechanism includes a base, a wind selection channel and a wind selection chamber are provided in the base, a recovery plate is provided in the wind selection chamber, a plurality of screening holes are provided on the recovery plate, and the plurality of screening holes on the recovery plate are reduced in order from top to bottom; A fan is provided on the side of the recovery plate away from the wind selection channel, a heating chamber is provided below the recovery plate, and a connecting pipe is connected to the circulation chamber, and one end of the connecting pipe away from the circulation chamber is connected to the heating chamber; an isolation mechanism for closing the heating chamber is provided between the heating chamber and the recovery plate; The isolation mechanism includes a second motor and a cleaning plate. The output end of the second motor is coaxially fixedly connected with a driving gear, the driving gear is meshed with a rack, an isolation plate is fixedly connected to the rack, protrusions are fixedly connected to both sides of the isolation plate, and a slide groove is opened on the base and the heating chamber, and the protrusion is located in the slide groove; the cleaning plate is located below the magnet block, and the cleaning plate is slidably matched with the base and the heating chamber. When the isolation plate moves to the farthest point, the rack and the cleaning plate are against each other; A magnet block is also provided in the air selection channel, and the magnet block is slidably matched with the base. A spring and a switch are fixedly connected between the magnet block and the base. The switch is electrically connected to the fan and the isolation mechanism. When the magnet block moves to the lowest point, the magnet block and the switch are against each other.

2. The wind turbine blade material degradation and recycling equipment according to claim 1 is characterized by: A plurality of crushing teeth are fixedly connected to the inner wall of the preheating tank, and the protrusions and the crushing teeth are arranged in a staggered manner.

3. The wind turbine blade material degradation and recycling equipment according to claim 1 is characterized by: A plurality of partitions are fixedly connected under the recovery plate, and the partitions are located between screening holes of different sizes.

4. The wind turbine blade material degradation and recycling equipment according to claim 1 is characterized by: The fan and the base are rotatably matched, and a gear is coaxially fixedly connected to the input end of the fan, and the diameter of the gear increases in sequence from top to bottom; A first motor is also fixedly connected above the rack, and an output shaft of the first motor is fixedly connected to a driving wheel. The driving wheel is connected to a plurality of transmission gears through a belt. The transmission gears are respectively meshed with the gears, and the diameters of the transmission gears are consistent.

5. The wind turbine blade material degradation and recycling equipment according to claim 1 is characterized by: A feed inlet is provided on the top of the preheating tank, a discharge port is provided on a side of the heating chamber close to the Ster engine, and sealing doors for sealing the feed inlet and the discharge port are provided on the feed inlet and the discharge port.

6. The wind turbine blade material degradation and recycling equipment according to claim 1 is characterized by: There is also a one-way valve in the connecting pipe, and the one-way valve can only allow the air in the heating chamber to flow into the circulation chamber.

7. The wind turbine blade material degradation and recycling equipment according to claim 1 is characterized by: A plurality of vents are also provided on the top of the recovery plate and the partition, and the fan is connected with the wind selection channel through the vents, and the diameter of the vents is smaller than the diameter of the fan.

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