Wind separator and wind separation system

Abstract

To provide a wind separator and a wind separation system, each enabling effective separation of a heavy object and a light object which are included in mixed waste.SOLUTION: A wind separator 5 has: a vertical passage 10; a first air inlet passage 20; a second air inlet passage 30; and a waste input passage 40 which is connected to the second air inlet passage 30 and extends above from the second air inlet passage 30. A heavy item discharge port 17 is provided at a lower end portion of the vertical passage 10. An air discharge port 18 is provided at an upper end portion of the vertical passage 10. The vertical passage 10 has a first ramp 11 and a second ramp 12 which are alternately inclined with respect to a horizontal direction. The first air inlet passage 20 is connected to the first ramp 11, and the second air inlet passage 30 is connected to the second ramp 12 which is located above the first ramp 11.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a wind sorting machine and a wind sorting system for sorting waste.

Background Art

[0002] In recent years, from the viewpoint of effective utilization of resources, it has been required to reuse waste as recyclable resources. For example, mixed waste discharged from a demolition site such as a house contains heavy materials such as metal pieces and concrete pieces, and light materials such as plastics and papers. An example of a conventional wind sorting system for sorting such mixed waste is disclosed in Patent Document 1.

[0003] The wind sorting system of Patent Document 1 is for sorting heavy materials and light materials mixed in waste, and includes a heavy material sorting machine which is a wind sorting machine, a light material sorting machine, and an air supply device.

[0004] The heavy object sorter has a vertical passage, a first air intake, a waste inlet, a heavy object discharge port, and a first air discharge port. The vertical passage is a zigzag path in which inclined portions alternately inclined in the left-right direction are formed in a plurality of stages in the vertical direction. The first air intake is disposed at the lower end of the vertical passage. The first air intake is provided for sending air into the vertical passage. The waste inlet is disposed at the upper end of the vertical passage. The waste inlet is provided for introducing mixed waste containing heavy objects and light objects into the vertical passage. A conveyor discharge section is disposed at the waste inlet, and the mixed waste transferred to the heavy object sorter by the conveyor is introduced. A blower of an air supply device is connected to the first air intake via a first duct section. Air is sent from the blower into the first air intake. The heavy object discharge port is disposed at the lower end of the vertical passage. The heavy object discharge port is provided for discharging the heavy objects that have fallen through the vertical passage. The first air discharge port is disposed at the upper end of the vertical passage. The first air discharge port is provided for discharging the air that has passed through the vertical passage. Mixed waste is introduced into the waste inlet. Air is sent into the first air intake and rises through the vertical passage. Among the mixed waste, the light objects are discharged from the first air discharge port together with the air rising through the vertical passage. Among the mixed waste, the heavy objects fall through the vertical passage and are discharged from the heavy object discharge port, and are collected in a heavy object collection container installed below the heavy object discharge port.

[0005] The lightweight object sorter has a second air intake, a screen, a rotary valve, a lightweight object discharge port, and a second air discharge port. The second air intake is provided to send the air mixed with the lightweight objects discharged from the first air discharge port into the interior of the lightweight object sorter. The screen is formed in a net shape that allows air to pass through and blocks the passage of lightweight objects. The rotary valve has a rotor with a plurality of blades provided radially. The rotary valve is configured such that when the rotor rotates, the lightweight objects caught by the blades of the rotor are removed from the screen. The lightweight object discharge port is provided to discharge the lightweight objects scraped up by the rotary valve. The second air discharge port is provided to discharge the air that has passed through the screen. The second air intake is connected to the first air discharge port of the heavy object sorter via a second duct portion. The air mixed with the lightweight objects discharged from the first air discharge port is sent into the second air intake. The lightweight objects mixed in the air sent into the second air intake are blocked from passing through the screen and are captured by the screen. The lightweight objects caught by the screen are removed from the screen by the blades of the rotor of the rotary valve and discharged from the lightweight object discharge port, and are collected in a lightweight object collection container installed below the lightweight object discharge port. The air that has passed through the screen is discharged from the second air discharge port provided behind the screen. The blower of the air supply device is connected to the second air discharge port via a third duct portion. The air discharged from the second air discharge port is returned to the blower.

[0006] The air supply device has a blower, and a first duct portion, a second duct portion, and a third duct portion that constitute an air circulation duct. The blower takes in the air discharged from the second air discharge port and sends it out toward the first air intake. The air circulation duct is configured to send the air sent out by the blower to the heavy object sorter and return it to the blower through the lightweight object sorter.

[0007] The heavy objects sorted in the air separation system are further sorted by material. An example of a conventional waste sorting system for sorting such heavy objects by material is disclosed in Patent Document 2.

[0008] The waste sorting system of Patent Document 2 has a conveyor, a camera, a robot arm, and a control device.

[0009] The conveyor conveys a plurality of wastes (heavy objects sorted by the air separation system) in one direction. An auxiliary conveyor is arranged upstream of the conveyor, and a vibrating sieve device is arranged between the conveyor and the auxiliary conveyor. The plurality of wastes conveyed by the auxiliary conveyor are sieved by the vibrating sieve device to remove those with a size below a predetermined size, and then supplied to the conveyor.

[0010] The camera is installed on the upstream side of the conveyor, and the camera is arranged to photograph the upstream part of the conveyor from above. The camera photographs the state in which a plurality of wastes are conveyed by the conveyor.

[0011] The robot arm is installed on the downstream side of the conveyor, and the robot arm is arranged beside the downstream part of the conveyor. The robot arm is controlled by the control device. The robot arm picks up the plurality of wastes on the conveyor one by one. Then, the robot arm moves the picked-up waste to the collection box provided for each material.

Prior Art Documents

Patent Documents

[0012]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0013] The heavy object sorting machine of Patent Document 1 has a zigzag-shaped vertical passage that is alternately inclined with respect to the left-right direction. When the mixed waste falls through the vertical passage, it collides with the inner surface of the vertical passage at the zigzag-shaped corners and scatters, separating the heavy objects and light objects that are entangled with each other. A first air inlet and a heavy object discharge port are provided at the lower end of the vertical passage, and a waste inlet and a first air discharge port are provided at the upper end of the vertical passage. When mixed waste is introduced into the waste inlet, the light objects contained in the mixed waste rise through the vertical passage together with the air sent into the first air inlet and are discharged from the first air discharge port, and the heavy objects contained in the mixed waste fall through the vertical passage and are discharged from the heavy object discharge port.

[0014] However, in the heavy object sorting machine of Patent Document 1, since the flow of air rising through the vertical passage is relatively monotonous, there is a possibility that the mixed waste cannot be sufficiently separated into heavy objects and light objects. Therefore, in the waste sorting system of Patent Document 2, the waste in a state where heavy objects and light objects are entangled may not be accurately discriminated in terms of its material, which may lead to a decrease in sorting accuracy.

[0015] Therefore, an object of the present invention is to provide a pneumatic sorting machine and a pneumatic sorting system that can effectively separate heavy objects and light objects contained in mixed waste.

Means for Solving the Problems

[0016] To achieve the above object, a pneumatic sorting machine according to an aspect of the present invention includes: a vertical passage; a first air inlet passage for sending air into the vertical passage; a second air inlet passage for sending air into the vertical passage; a waste inlet passage connected to the second air inlet passage and extending upward from the second air inlet passage, and has a waste discharge port is provided at the lower end of the vertical passage, and an air discharge port is provided at the upper end of the vertical passage, the vertical passage has a plurality of inclined portions that are alternately inclined with respect to the horizontal direction, The first air inlet passage is connected to a first inclined portion among the plurality of inclined portions. The second air inlet passage is connected to a second inclined portion disposed above the first inclined portion among the plurality of inclined portions.

[0017] In the present invention, The first air inlet passage has a horizontal portion connected to the first inclined portion. It is preferable that the horizontal portion is arranged such that a connection portion of the horizontal portion with the first inclined portion faces a first inclined surface facing upward in the first inclined portion in a horizontal direction.

[0018] In the present invention, It is preferable that the connection portion is formed such that a passage area decreases as it approaches the first inclined portion.

[0019] In the present invention, It is preferable that a lower portion of the connection portion protrudes in a eaves shape inside the first inclined portion.

[0020] In the present invention, The first air inlet passage has an L shape in which the horizontal portion and the vertical portion are connected. It is preferable that the vertical portion extends upward from the horizontal portion.

[0021] To achieve the above object, a wind power sorting system according to another aspect of the present invention is A wind power sorting system having a wind power sorter and a blower, The wind power sorter A vertical passage, A first air inlet passage for sending air into the vertical passage, A second air inlet passage for sending air into the vertical passage, And a waste input passage connected to the second air inlet passage and extending upward from the second air inlet passage. A waste outlet is provided at the lower end of the vertical passage, and an air outlet is provided at the upper end of the vertical passage. The vertical passage has a plurality of inclined portions that are alternately inclined with respect to the horizontal direction. The first air inlet passage is connected to a first inclined portion among the plurality of inclined portions. The second air inlet passage is connected to a second inclined portion disposed above the first inclined portion among the plurality of inclined portions. The blower feeds air into the vertical passage through the first air inlet passage and the second air inlet passage. This is the gist of the invention.

Advantages of the Invention

[0022] According to the present invention, a first air inlet passage for feeding air into the vertical passage is connected to a first inclined portion of the vertical passage, and a second air inlet passage for feeding air into the vertical passage is connected to a second inclined portion disposed above the first inclined portion, and a waste input passage extending upward from the second air inlet passage is connected thereto. Thus, the air sent into the vertical passage from the first air inlet passage rises in the vertical passage and is discharged from an air outlet provided at the upper end of the vertical passage, and the air flowing through the second air inlet passage hits the mixed waste that has fallen from the waste input passage into the second air inlet passage and is sent into the vertical passage together with the mixed waste. Therefore, the mixed waste is loosened by the air flowing through the second air inlet passage before reaching the vertical passage, making it easier to separate the mixed waste into heavy and light objects. Therefore, separation in the vertical passage is promoted, and the heavy and light objects contained in the mixed waste can be effectively separated.

[0023] Further, the first air inlet passage has a horizontal portion connected to the first inclined portion, and the horizontal portion is arranged such that the connection portion of the horizontal portion with the first inclined portion faces the first inclined surface facing upward in the first inclined portion in the horizontal direction. By doing so, when the air sent from the first air inlet passage to the first inclined portion hits the first inclined surface, the air rises along the first inclined surface. Therefore, the amount of air rising in the vertical passage can be effectively increased.

[0024] In addition, the connection part between the horizontal part of the first air inlet passage and the first inclined part is formed such that the passage area becomes smaller as it approaches the first inclined part. By doing so, the speed of the air sent from the first air inlet passage to the first inclined part can be increased. Therefore, the heavy and light objects contained in the mixed waste can be separated more effectively.

[0025] In addition, the lower part of the connection part between the horizontal part of the first air inlet passage and the first inclined part protrudes in a roof shape inside the first inclined part. By doing so, the pressure of the air in the space below the connection part in the first inclined part decreases, and small waste such as scraps of heavy objects in the first inclined part can be drawn into the space.

[0026] In addition, the first air inlet passage has an L-shaped configuration in which a horizontal part and a vertical part are connected, and the vertical part extends upward from the horizontal part. By doing so, the waste input passage and the first air inlet passage extend upward, and the plan view area of the air classifier can be made smaller. Note that by making the second air inlet passage L-shaped in the same manner as the first air inlet passage, the plan view area of the air classifier can be made even smaller.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiment for Carrying Out the Invention

[0028] Hereinafter, a pneumatic separation system according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

[0029] FIG. 1 is a diagram showing the configuration of a pneumatic separation system according to an embodiment of the present invention. FIG. 2 is a diagram showing the configuration of a pneumatic separator included in the pneumatic separation system. FIG. 3 is an enlarged view showing a part of the pneumatic separator (mainly the connection portion between the first inclined portion of the vertical passage and the first air inlet passage). FIG. 4 is an enlarged view showing another part of the pneumatic separator (mainly the connection portion between the second inclined portion of the vertical passage and the second air inlet passage). FIG. 5 is a diagram showing an example of the air flow inside the pneumatic separator. FIG. 6 is a diagram showing an example of the pressure distribution of the air inside the pneumatic separator. In FIGS. 5 and 6, the direction of air flow is schematically shown by arrows.

[0030] The pneumatic separation system according to the present embodiment is used, for example, to separate (sort) heavy objects such as metal pieces and concrete pieces from light objects such as plastics and papers by introducing mixed waste containing heavy objects and light objects.

[0031] As shown in FIG. 1, the pneumatic separation system 1 according to the present embodiment includes a pneumatic separator 5, a lightweight object collector 50, a blower 60, and an air volume distribution device 70.

[0032] As shown in FIG. 2, the pneumatic separator 5 includes a vertical passage 10, a first air inlet passage 20, a second air inlet passage 30, and a waste input passage 40. In the description of the pneumatic separator 5, "up and down, left and right" corresponds to up and down, left and right in FIGS. 2 to 4, and shows the relative positional relationship of each part. In FIGS. 2 to 4, the left-right direction is the horizontal direction.

[0033] The vertical passage 10 has a tubular shape. The vertical passage 10 has a first inclined portion 11, a second inclined portion 12, an air discharge passage 14, and a connection passage 15.

[0034] The first inclined portion 11 is inclined upward as it goes from right to left. A weight discharge port 17 facing downward is provided at the lower end of the first inclined portion 11. The weight discharge port 17 is a waste discharge port. The inclination angle (elevation angle) of the first inclined portion 11 is preferably 30 to 60 degrees with respect to the left - right direction.

[0035] The second inclined portion 12 is inclined upward as it goes from left to right. The second inclined portion 12 is disposed above the first inclined portion 11. The inclination angle (elevation angle) of the second inclined portion 12 is preferably 30 to 60 degrees with respect to the left - right direction.

[0036] The upper end of the first inclined portion 11 and the lower end of the second inclined portion 12 are connected via a connection passage 15 extending in the vertical direction. The first inclined portion 11 and the second inclined portion 12 are a plurality of inclined portions inclined alternately with respect to the left - right direction.

[0037] The air discharge passage 14 extends in the vertical direction. The lower end of the air discharge passage 14 is connected to the upper end of the second inclined portion 12. An air discharge port 18 facing upward is provided at the upper end of the air discharge passage 14.

[0038] The first air inlet passage 20 has a tubular shape. The first air inlet passage 20 has a horizontal portion 21 and a vertical portion 22, and is formed in an L shape. The right end of the horizontal portion 21 and the lower end of the vertical portion 22 are connected. The connection portion between the horizontal portion 21 and the vertical portion 22 is formed in an arc shape. The left end of the horizontal portion 21 is a connection portion 23 connected to the first inclined portion 11. The opening 23a of the connection portion 23 faces the first inclined surface 11s facing upward in the first inclined portion 11 in the left - right direction. The bottom wall 23b, which is the lower part of the connection portion 23, protrudes in a shield shape inside the first inclined portion 11. The inclination angle (elevation angle) of the bottom wall 23b is preferably 5 to 20 degrees with respect to the left - right direction. The upper wall 23c, which is the upper part of the connection portion 23, is arranged parallel to the left - right direction. The passage area of the connection portion 23 gradually decreases as it approaches the first inclined portion 11. At the upper end of the vertical portion 22, a first air inlet 24 facing upward is provided.

[0039] The second air inlet passage 30 has a tubular shape. The second air inlet passage 30 extends in the left - right direction. The right end of the second air inlet passage 30 is a connection portion 33 connected to the second inclined portion 12. The opening 33a of the connection portion 33 faces the second inclined surface 12s facing upward in the second inclined portion 12 in the left - right direction. At the left end of the second air inlet passage 30, a second air inlet 34 facing leftward is provided.

[0040] The waste input passage 40 has a tubular shape. The waste input passage 40 extends in the up - down direction. The lower end of the waste input passage 40 is a connection portion 43 connected to the connection portion 33 of the second air inlet passage 30. The opening 43a of the connection portion 43 faces the second inclined surface 12s facing upward in the second inclined portion 12 in the up - down direction. At the upper end of the waste input passage 40, a waste input port 44 facing upward is provided.

[0041] The lightweight material collector 50 removes lightweight materials from the air mixed with lightweight materials discharged from the air classifier 5. The lightweight material collector 50 includes a housing 51, a screen 52, and a rotor 53. The housing 51 is provided with an air inlet 51a, an air outlet 51b, and a lightweight material discharge port 54. The air inlet 51a is connected to the air outlet 18 of the air classifier 5 via a pipe P1. The air inlet 51a is provided to send the air mixed with lightweight materials discharged from the air outlet 18 into the interior of the housing 51. The screen 52 is disposed inside the housing 51 so as to partition the air inlet 51a and the air outlet 51b. The screen 52 is formed in a net shape that allows air to pass through and blocks lightweight materials from passing through. The air outlet 51b is provided to discharge the air that has passed through the screen 52 from the interior of the housing 51. The rotor 53 has a plurality of blades arranged radially. When the rotor 53 rotates, the lightweight materials caught by the screen 52 by the blades of the rotor 53 are removed from the screen 52. The lightweight material discharge port 54 faces downward and is provided to discharge the lightweight materials removed from the screen 52 by the rotor 53.

[0042] The blower 60 has a suction port 60a and a blowout port 60b. The suction port 60a is connected to the air outlet 51b of the lightweight material collector 50 via a pipe P2. The blowout port 60b is provided to blow out the air inhaled from the suction port 60a at a predetermined air volume. The blower 60 blows out, for example, air with an air volume of 200 m 3 / min from the blowout port 60b.

[0043] The air volume distribution device 70 distributes and discharges the air volume of the air taken in from the intake port 70a to the first outlet 70b and the second outlet 70c at a predetermined ratio. The intake port 70a is connected to the blowout port 60b of the blower 60 via a pipe P3. The first outlet 70b is connected to the first air inlet 24 of the air classifier 5 via a pipe P4. The second outlet 70c is connected to the second air inlet 34 of the air classifier 5 via a pipe P5. The air volume distribution device 70 takes in, for example, air with an air volume of 200 m 3 / min from the intake port 70a and 160 m3 Air with a volume of air per minute is discharged from the first outlet 70b, 40 m 3 Air with a volume of air per minute is discharged from the second outlet 70c.

[0044] Next, the operation of the wind power separation system 1 will be described.

[0045] The air blown out from the blower 60 is distributed by the air volume distribution device 70 and sent into the first air inlet passage 20 from the first air inlet 24 of the wind power separator 5, and sent into the second air inlet passage 30 from the second air inlet 34.

[0046] The air (first air A1) sent into the first air inlet passage 20 enters the first inclined portion 11 of the vertical passage 10. At this time, since the cross-sectional area of the connection portion 23 of the first air inlet passage 20 gradually decreases as it approaches the first inclined portion 11, the wind speed of the first air A1 increases. Due to the flow of the first air A1 entering the first inclined portion 11, the pressure of the air in the space R below the bottom wall 23b of the connection portion 23 in the first inclined portion 11 decreases, and a negative pressure region is formed. The first air A1 that has entered the first inclined portion 11 hits the first inclined surface 11s, rises through the connection passage 15, the second inclined portion 12, and the air discharge passage 14, and is discharged from the air discharge port 18.

[0047] The air (second air A2) sent into the second air inlet passage 30 enters the second inclined portion 12 of the vertical passage 10. The second air A2 that has entered the second inclined portion 12 merges with the first air A1 that rises through the second inclined portion 12, rises through the air discharge passage 14, and is discharged from the air discharge port 18.

[0048] When mixed waste is input from the waste input port 44 of the wind power separator 5 into the waste input passage 40, the mixed waste falls through the waste input passage 40 and enters the connection portion 33 of the second air inlet passage 30. The mixed waste that has entered the connection portion 33 is blown by the second air A2 and merges with the first air A1 that rises through the second inclined portion 12 together with the second air A2. At this time, an airflow that is intricately intertwined with the first air A1 and the second air A2 is generated, the mixed waste is effectively loosened, and the heavy objects and light objects are separated.

[0049] Of the mixed waste that has reached the second inclined portion 12, the lightweight materials rise in the vertical passage 10 together with the first air A1 and the second air A2 and are discharged from the air discharge port 18. Among the mixed waste, the heavy materials and the lightweight materials entangled with the heavy materials fall in the vertical passage 10. When they reach the first inclined portion 11, the first air A1 with an increased wind speed is blown, and the heavy materials and the lightweight materials are separated also at the first inclined portion 11. Also, small waste such as pieces of the heavy materials at the first inclined portion 11 can be drawn into the space R (negative pressure region) below the bottom wall 23b. The heavy materials that have fallen in the vertical passage 10 are discharged from the heavy material discharge port 17.

[0050] The air mixed with the lightweight materials discharged from the air discharge port 18 is sent to the lightweight material collector 50. The lightweight materials are blocked from passing through the screen 52 and are captured by the screen 52. The lightweight materials caught by the screen 52 are removed from the screen 52 by the blades of the rotor 53 and are discharged from the lightweight material discharge port 54. The air that has passed through the screen 52 is returned to the blower 60.

[0051] FIG. 5 shows an example of the air flow inside the wind power separator 5 based on the simulation. In FIG. 5, a vortex is formed below the connection portion 23 (bottom wall 23b) of the first air inlet passage 20 at the first inclined portion 11 of the vertical passage 10. In FIG. 5, the first air A1 and the second air A2 merge near the connection portion 33 of the second air inlet passage 30.

[0052] FIG. 6 is a diagram showing an example of the pressure distribution of air inside the wind power separator 5 based on simulation. In FIG. 6, the lighter the color, the higher the air pressure, and the darker the color, the lower the air pressure. In FIG. 6, the air pressure at the connection portion between the horizontal portion 21 and the vertical portion 22 of the first air inlet passage 20 becomes high, and the air pressure at the portion extending from the upper end of the first inclined portion 11 to the lower end of the second inclined portion 12 of the vertical passage 10 becomes high. In FIG. 6, the air pressure in the space R below the connection portion 23 (bottom wall 23b) of the first air inlet passage 20 in the first inclined portion 11 of the vertical passage 10 becomes low, and the air pressure at the lower end of the air discharge passage 14 (particularly the portion near the second air inlet passage 30) becomes low.

[0053] Next, an example of the waste sorting system 100 in which the wind power sorting system 1 is incorporated will be described with reference to FIG. 7. FIG. 7 shows the configuration of the waste sorting system 100 in which the wind power sorting system 1 is incorporated.

[0054] In the waste sorting system 100, the mixed waste is put into the crusher 120 by the hydraulic excavator 110 and finely crushed. The crushed mixed waste is conveyed and fed into the wind power sorting system 1 (wind power separator 5) by the screw conveyor C1. In the wind power sorting system 1, the mixed waste is separated into heavy objects and light objects. The heavy objects are conveyed and fed into the automatic sorter 130 via the conveyor C2 and the vibrating feeder F. The automatic sorter 130 estimates the material based on the image of the heavy object taken, and sorts and recovers the heavy object for each material using the robot arm based on the estimation result. The light objects are conveyed and fed into the wrapping beveler 140 by the conveyor C3. The wrapping beveler 140 compresses and forms the light objects into a rectangular parallelepiped shape, and fixes the shape by winding a transparent wrap to produce a rectangular parallelepiped shaped molded body.

[0055] As described above, the wind power separation system 1 includes a wind power separator 5, a lightweight material collector 50, a blower 60, and an air volume distribution device 70. The wind power separator 5 has a vertical passage 10, a first air inlet passage 20 for sending air into the vertical passage 10, a second air inlet passage 30 for sending air into the vertical passage 10, and a waste input passage 40 connected to the second air inlet passage 30 and extending upward from the second air inlet passage 30. A heavy material discharge port 17 is provided at the lower end of the vertical passage 10. An air discharge port 18 is provided at the upper end of the vertical passage 10. The vertical passage 10 has a first inclined portion 11 and a second inclined portion 12 that are alternately inclined with respect to the horizontal direction. The first air inlet passage 20 is connected to the first inclined portion 11, and the second air inlet passage 30 is connected to the second inclined portion 12 disposed above the first inclined portion 11.

[0056] Thus, the air sent from the first air inlet passage 20 into the vertical passage 10 rises in the vertical passage 10 and is discharged from the air discharge port 18 provided at the upper end of the vertical passage 10. When the air flowing through the second air inlet passage 30 hits the mixed waste that has fallen from the waste input passage 40 into the second air inlet passage 30, it is sent into the vertical passage 10 together with the mixed waste. Therefore, the mixed waste is loosened by the air flowing through the second air inlet passage 30 before reaching the vertical passage 10, making it easier to separate the mixed waste into heavy materials and lightweight materials. Therefore, the separation in the vertical passage 10 is promoted, and the heavy materials and lightweight materials contained in the mixed waste can be effectively separated.

[0057] In addition, the first air inlet passage 20 has a horizontal portion 21 connected to the first inclined portion 11, and the horizontal portion 21 is arranged such that the connection portion 23 of the horizontal portion 21 with the first inclined portion 11 faces the first inclined surface 11s facing upward in the first inclined portion 11 in the horizontal direction. By doing so, when the air sent from the first air inlet passage 20 into the first inclined portion 11 hits the first inclined surface 11s, the air rises along the first inclined surface 11s. Therefore, the amount of air rising in the vertical passage 10 can be effectively increased.

[0058] In addition, the connection portion 23 of the horizontal portion 21 of the first air inlet passage 20 is formed such that the passage area decreases as it approaches the first inclined portion 11. By doing so, the speed of the air sent from the first air inlet passage 20 to the first inclined portion 11 can be increased. Therefore, the heavy and light objects contained in the mixed waste can be separated more effectively.

[0059] In addition, the bottom wall 23b of the connection portion 23 of the horizontal portion 21 of the first air inlet passage 20 protrudes in a canopy shape inside the first inclined portion 11. By doing so, the pressure of the air in the space R below the connection portion 23 in the first inclined portion 11 decreases, and small waste such as scraps of heavy objects in the first inclined portion 11 can be drawn into the space R.

[0060] In addition, the first air inlet passage 20 has an L shape in which the horizontal portion 21 and the vertical portion 22 are connected, and the vertical portion 22 extends upward from the horizontal portion 21. By doing so, the waste input passage 40 and the first air inlet passage 20 extend upward, and the plan view area of the air classifier 5 can be made smaller. Note that the second air inlet passage 30 can also be made L-shaped in the same manner as the first air inlet passage 20, further reducing the plan view area of the air classifier 5.

[0061] Next, a modified example of the air classifier 5 will be described with reference to FIGS. 8 to 10.

[0062] FIG. 8 shows an air classifier 5A which is a first modified example of the air classifier 5. The air classifier 5A has the position of the waste input passage 40 closer to the second air inlet 34 than the air classifier 5, and the opening 43a of the connection portion 43 of the waste input passage 40 faces the bottom surface of the second air inlet passage 30 in the vertical direction. The air classifier 5A has the same configuration as the air classifier 5 except for the position of the waste input passage 40.

[0063] FIG. 9 shows an air classifier 5B which is a second modified example of the air classifier 5. The air classifier 5B has the same configuration as the air classifier 5 except that the bottom wall 23Bb which is the lower part of the connection portion 23B of the first air inlet passage 20 does not protrude into the first inclined portion 11.

[0064] Figure 10 shows a wind separator 5C which is a third modification of the wind separator 5. The wind separator 5C has a vertical passage 10 including a first inclined portion 11, a second inclined portion 12, a third inclined portion 13C, an air discharge passage 14, a connection passage 15, and a connection passage 16C.

[0065] The third inclined portion 13C is inclined upward from right to left. The third inclined portion 13C is disposed above the second inclined portion 12. The inclination angle (elevation angle) of the third inclined portion 13C is preferably 30 to 60 degrees with respect to the left - right direction.

[0066] The upper end of the second inclined portion 12 and the lower end of the third inclined portion 13C are connected via a connection passage 16C extending in the vertical direction. The upper end of the third inclined portion 13C is connected to the lower end of the air discharge passage 14. The first inclined portion 11, the second inclined portion 12, and the third inclined portion 13C are a plurality of inclined portions alternately inclined with respect to the left - right direction.

[0067] The lower end of the waste input passage 40 is a connection portion 43C connected to the connection portion 33 of the second air inlet passage 30. The connection portion 43C is inclined downward from left to right.

[0068] The wind separator 5C has the same configuration as the wind separator 5 except that the vertical passage 10 has the third inclined portion 13C and the connection passage 16C, and the connection portion 43C of the waste input passage 40 is inclined.

[0069] The wind separators 5A to 5C also have the same effects as the wind separator 5. In this specification, "the same" also includes the meaning of "substantially the same".

[0070] Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations of the embodiments. For the foregoing embodiments, those obtained by appropriately adding, deleting, or changing the design of components by those skilled in the art, or those obtained by appropriately combining the features of the embodiments, are included in the scope of the present invention as long as they do not depart from the spirit of the present invention.

Explanation of Reference Numerals

[0071] 1…Wind sorting system 5, 5A, 5B, 5C…Wind sorters 10…Vertical passage, 11…First inclined portion, 11s…First inclined surface, 12…Second inclined portion, 12s…Second inclined surface, 13C…Third inclined portion, 14…Air discharge passage, 15…Connection passage, 16C…Connection passage, 17…Heavy object discharge port, 18…Air discharge port 20…First air inlet passage, 21…Horizontal portion, 22…Vertical portion, 23, 23B…Connection portions, 23a…Opening, 23b, 23Bb…Bottom wall, 23c…Top wall, 24…First air inlet 30…Second air inlet passage, 33…Connection portion, 33a…Opening, 34…Second air inlet 40…Waste input passage, 43, 43C…Connection portions, 43a…Opening, 44…Waste input port 50…Light object collector, 51…Housing, 51a…Air inlet, 51b…Air outlet, 52…Screen, 53…Rotor, 54…Light object discharge port 60…Blower, 60a…Suction port, 60b…Blowout port 70…Air volume distribution device, 70a…Intake port, 70b…First outlet, 70c…Second outlet 100…Waste sorting system, 110…Hydraulic excavator, 120…Crusher, 130…Automatic sorter, 140…Wrapping beveler A1…First air, A2…Second air C1…Screw conveyor, C2, C3…Conveyor, F…Vibrating feeder P1~P5…Pipes R…Space

Claims

1. a vertical passageway, a first air inlet passage for feeding air into the vertical passageway, a second air inlet passage for feeding air into the vertical passageway, a waste input passage connected to the second air inlet passage and extending upward from the second air inlet passage, and a waste outlet is provided at a lower end of the vertical passageway, and an air outlet is provided at an upper end of the vertical passageway, the vertical passageway has a plurality of inclined portions alternately inclined with respect to the horizontal direction, the first air inlet passage is connected to a first inclined portion among the plurality of inclined portions, the second air inlet passage is connected to a second inclined portion disposed above the first inclined portion among the plurality of inclined portions, wherein the wind separation machine is characterized by the above.

2. the first air inlet passage has a horizontal portion connected to the first inclined portion, the horizontal portion is arranged such that a connection portion of the horizontal portion with the first inclined portion faces a first inclined surface facing upward in the first inclined portion in the horizontal direction, the wind separation machine according to claim 1.

3. the connection portion is formed such that a cross-sectional area thereof becomes smaller as it approaches the first inclined portion, the wind separation machine according to claim 2.

4. a lower portion of the connection portion protrudes in a shelter shape inside the first inclined portion, the wind separation machine according to claim 2.

5. the first air inlet passage has an L shape in which the horizontal portion and the vertical portion are connected, the vertical portion extends upward from the horizontal portion, the wind separation machine according to any one of claims 2 to 4.

6. a wind separation system having a wind separation machine and a blower, wherein the wind separation machine has a vertical passageway, A first air inlet passage for feeding air into the vertical passage, A second air inlet passage for feeding air into the vertical passage, A waste input passage connected to the second air inlet passage and extending upward from the second air inlet passage, A waste discharge port is provided at the lower end of the vertical passage, and an air discharge port is provided at the upper end of the vertical passage, The vertical passage has a plurality of inclined portions alternately inclined with respect to the horizontal direction, The first air inlet passage is connected to a first inclined portion among the plurality of inclined portions, The second air inlet passage is connected to a second inclined portion disposed above the first inclined portion among the plurality of inclined portions, The air blower feeds air into the vertical passage through the first air inlet passage and the second air inlet passage. A wind power sorting system characterized by this.

Images