CN110774486B

CN110774486B - Copper powder recycling system of waste PCB

Info

Publication number: CN110774486B
Application number: CN201911101038.7A
Authority: CN
Inventors: 邬斌; 汤晓东; 李丰伟
Original assignee: Kunshan Xinsheng Regeration Material Recycling Co ltd
Current assignee: Kunshan Xinsheng Regeration Material Recycling Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2021-07-20
Anticipated expiration: 2039-11-12
Also published as: CN110774486A

Abstract

The invention discloses a copper powder recycling system of waste PCB boards, relating to the field of PCB boards and aiming at solving the problem of low processing efficiency of the waste PCB boards, the technical scheme is that the device comprises a feeding mechanism, a crushing mechanism, a reservation mechanism, a sorting mechanism and a dust removing mechanism, wherein the feeding mechanism comprises a bracket, a conveyor belt and a conveying motor, so that an operator can conveniently feed the materials, the crushing mechanism comprises a coarse crusher, a pre-crusher and a fine crusher, a PCB is crushed into powdery particle materials for three times, the reservation mechanism temporarily stores the powdery particles, processing the PCB at the maximum processing speed by processing equipment before the reserved mechanism, wherein the sorting mechanism comprises a first specific gravity sorting machine and a second specific gravity sorting machine, the two specific gravity sorting machines work simultaneously to improve the processing capacity in unit time, and the two specific gravity sorting machines output copper particles in the powdery particles; the automatic material conveying device has the technical effects of simple processing process, high material conveying speed and high processing efficiency.

Description

Copper powder recycling system of waste PCB

Technical Field

The invention relates to the technical field of PCB (printed circuit board), in particular to a copper powder recycling system of a waste PCB.

Background

PCB boards, also known as printed circuit boards, are providers of electrical connections for electronic components. Are widely used in electronic components provided with integrated circuits. Along with the development of economy, electronic equipment is increased day by day, the usage amount of the PCB is increased, the waste PCB is polluted due to frequent replacement of the electronic equipment, and the waste PCB is recycled due to the fact that the PCB contains a large amount of recyclable copper and resin, so that resources are saved, and the environment is protected.

The invention discloses a waste PCB crushing and sorting system which comprises a disassembling unit, a crushing unit, a primary air separation unit, an iron removal unit, a grinding unit, a fine iron removal unit, an air separation unit, a high-voltage electrostatic separation unit, a dust waste gas treatment unit and a central control unit, wherein after PCB is disassembled and primarily crushed, the PCB is subjected to primary air separation and primary iron removal, then is subjected to grinding, secondary iron removal and air separation in sequence, and finally is subjected to high-voltage electrostatic separation to obtain a copper-containing metal concentrate.

The above prior art solutions have the following drawbacks: the PCB processing process is too tedious and needs to pass through too many devices, thereby resulting in the increase of the material conveying time. In order to ensure that no material is blocked between equipment, the transmission speed of the material can only be reduced, the conveying time of the material is further increased, and the processing efficiency of the PCB is low.

Disclosure of the invention

The invention aims to provide a copper powder recycling system for waste PCBs, which has the advantage of high processing efficiency of the waste PCBs.

The above object of the present invention is achieved by the following technical solutions: a copper powder recycling system for waste PCB boards comprises a feeding mechanism, a crushing mechanism, a reservation mechanism, a sorting mechanism and a dust removing mechanism, wherein the feeding mechanism comprises a conveyor belt and a conveying motor, the crushing mechanism comprises a coarse crusher positioned below one end of the conveyor belt, the lower end of the coarse crusher is connected with a pre-crusher, the lower end of the pre-crusher is connected with a first conveying device, and one end, far away from the pre-crusher, of the first conveying device is connected with the upper end of a fine crusher;

the reservation mechanism comprises a temporary storage hopper, the temporary storage hopper is connected with the fine crusher through a second conveying device, and a cyclone separation device is arranged in the temporary storage hopper;

the sorting mechanism comprises a first specific gravity sorting machine and a second specific gravity sorting machine, the first specific gravity sorting machine and the second specific gravity sorting machine are connected with the temporary storage hopper through a third conveying device, discharging plates are arranged on the first specific gravity sorting machine and the second specific gravity sorting machine, and a fourth conveying device is arranged above the discharging plates;

the dust removal mechanism comprises a bag type dust removal device connected with the fourth conveying device, one side of the bag type dust removal device is connected with an electrostatic dust removal device, a discharge pipe is arranged on one side of the electrostatic dust removal device, and a discharge groove is formed in the discharge pipe.

Through adopting above-mentioned technical scheme, operating personnel emptys the PCB board in feed mechanism, makes the PCB board carried broken mechanism in, and broken mechanism is broken to the PCB board, makes the PCB board finally processed into powdered granule. Then transported in the reservation mechanism, reservation mechanism plays the reservation effect, because broken process velocity is very fast in the actual production, and subsequent sorting process velocity is relatively slow, consequently increases reservation mechanism, makes the PCB board of broken powdered granule keep in reservation mechanism, and then makes broken processing need not reduce process velocity, improves the machining efficiency of PCB board.

The cyclone separation device is arranged in the reservation mechanism, and enables copper particles with larger mass in powder particles to be positioned at the lower end of the reservation mechanism, so that resin particles with smaller mass in the powder particles float at the upper end of the reservation mechanism, and the copper particles preferentially enter the sorting mechanism. On one hand, the cyclone separation device carries out primary screening on copper particles and resin particles before sorting processing, so that the purity of finally collected copper particles is improved. On the other hand cyclone device reserves some powdered particles in the reservation mechanism, reduces the powdered particle total amount that enters into sorting mechanism, makes more copper granules enter into sorting mechanism, reduces sorting mechanism's work load, avoids entering into the powdered particle total amount in sorting mechanism too big, produces in sorting mechanism and piles up, therefore makes sorting mechanism's machining efficiency improve.

Powdered particle is carried to sorting mechanism by reservation mechanism, and sorting mechanism includes first proportion sorter and second proportion sorter, and two proportion sorters simultaneous workings can handle a larger amount of powdered particle in the unit interval for machining efficiency.

Copper particles are finally collected by an operator on the discharge plate, the whole processing process of the copper particles only carries out three-time crushing, one-time reservation and one-time separation, the processing process is simple, the conveying time of materials is short, the processing efficiency is high, and the purity of the final copper particles reaches 95-96%. The vertical setting of coarse crusher and the pre-crusher of broken mechanism makes the whereabouts speed of PCB board accelerate, and then makes the required length of broken processing shorten, further improves machining efficiency.

The invention is further configured to: the feeding mechanism is obliquely arranged and comprises a U-shaped support, the conveying belt is located inside the support, and the conveying motor is located on one side of the support and is rotatably connected with the support.

Through adopting above-mentioned technical scheme, feed mechanism includes conveyer belt and conveying motor, and the conveyer belt is located inside the support, and the support is whole roughly to be "U" shape, and when operating personnel emptys the PCB board in feed mechanism, the support plays limiting displacement to the PCB board on the conveyer belt, makes the PCB board can't drop the conveyer belt outside, and then can hold more PCB boards among the messenger feed mechanism. When empting the PCB, operating personnel need not wait until the PCB is carried a period of time by the conveyer belt and then emptys, also need not worry about the speed of empting the PCB too fast, make the PCB drop the conveyer belt outside, and then make operating personnel's material loading speed improve, the machining efficiency of PCB improves.

The invention is further configured to: the first conveying device comprises a first conveying pipe, a first screw rod is arranged in the first conveying pipe, and a first driver used for driving the first screw rod to rotate is arranged on the upper surface of the first conveying pipe.

By adopting the technical scheme, the PCB subjected to twice crushing is conveyed to the fine crusher by the first conveying device. First transmission device selects to use first driver to drive first hob and carries the PCB board, compares in the mode of conveyer belt, and the slew velocity upper limit of first hob is higher, and slew velocity is faster, and then carries the speed of PCB board faster, makes the transport of PCB board shorten for a long time, and then reduces the processing of PCB board always long, improves the machining efficiency of PCB board.

The invention is further configured to: the second conveying device comprises a second conveying pipe, and the second conveying pipe is connected with a second negative pressure driver.

Through adopting above-mentioned technical scheme, the PCB board becomes powdered particle through the fine crusher processing back, and during second conveyer carried powdered particle to the fill of keeping in, second conveyer included second conveying pipe and second negative pressure driver. The second negative pressure driver enables the interior of the second conveying pipe to form negative pressure, and then the powder particles in the fine crusher are conveyed to the temporary storage hopper. Because the quality of powdered particle is little, compare in the transport mode of conveyer belt or hob, utilize the negative pressure to carry convenient and fast, and the velocity of motion of powdered particle is faster, also is difficult for remaining a large amount of powdered particles in the fine crusher, influences the subsequent processing of fine crusher, shortens powdered particle and is used long in transportation process, improves the machining efficiency of PCB board.

The invention is further configured to: the lower end of the temporary storage hopper is connected with a temporary storage part, the third conveying device is connected with the temporary storage part, the third conveying device comprises a third conveying pipe, a third screw rod is arranged in the third conveying pipe, a third driver is arranged on the third conveying pipe, one end, far away from the temporary storage part, of the third conveying pipe is connected with a first feeding pipe and a second feeding pipe, the first feeding pipe is located above the first proportional sorting machine, the first feeding pipe is connected with the first proportional sorting machine, and the second feeding pipe is connected with the second proportional sorting machine.

Through adopting above-mentioned technical scheme, the internal space of the piece of keeping in keeps in relatively keeping in the fill less, powdered granule accumulation speed in the piece of keeping in is faster to the whole thickness that makes the powdered granule in the piece of keeping in is higher, the third hob of being convenient for carries powdered granule to the sorting mechanism in by the piece of keeping in, and the whole thickness of avoiding powdered granule is lower, and the powdered granule total amount that makes the third hob carry in the unit interval is less, leads to the work efficiency decline of third hob. First conveying pipe and second conveying pipe are located the top of first proportion sorter and second proportion sorter, and powdered particle enters into first conveying pipe and second conveying pipe after, because action of gravity, falls into first proportion sorter or second proportion sorter, because powdered particle quality is less, therefore the decline speed is slower, makes first proportion sorter and second proportion sorter be difficult for piling up powdered particle, and then guarantees that the copper granule purity of separating is higher.

The invention is further configured to: the first proportion sorter is provided with a first screen, a first vibrator and a first air blower, the second proportion sorter is provided with a second screen, a second vibrator and a second air blower, the first air blower is located below the first screen, and the second air blower is located below the second screen.

Through adopting above-mentioned technical scheme, first bobbing machine drives first screen cloth vibrations, and the vibrations of second screen cloth are driven to the second bobbing machine. And then the resin particles with relatively lighter weight in the powdery particles float above the copper particles with relatively heavier weight, and then the copper particles are separated from the resin particles through air flows generated by a first air blower positioned below the first screen and a second air blower positioned below the second screen, so that the purity of the copper particles is improved.

The invention is further configured to: the fourth conveying device comprises a dust hood located above the discharging plate, the upper end of the dust hood is connected with a fourth conveying pipe, the fourth conveying pipe is connected with a fourth negative pressure driver, and one end, far away from the discharging plate, of the fourth conveying pipe is connected with the bag type dust removal device.

By adopting the technical scheme, the resin particles floating in the air are blown by the air flow to enter the dust hood and are completely separated from the copper particles. The upper end of the dust hood is connected with a fourth conveying pipe, and a fourth negative pressure driver forms negative pressure in the fourth conveying pipe, so that resin particles move to the bag type dust removal device from the fourth conveying pipe. The dust hood and the fourth conveying pipe reduce the content of dust and resin particles in the processing workshop, ensure clean space, reduce pollution and ensure the health of operators. The bag-type dust removal device cleans dust doped in the resin particles, and improves the purity of the resin particles.

The invention is further configured to: the electrostatic dust collector lower extreme is connected with the dust removal conveyer pipe, the one end that the electrostatic dust collector was kept away from to the dust removal conveyer pipe is connected with supplementary breaker, supplementary breaker is connected with fifth conveyer, fifth conveyer is connected with the piece of keeping in.

Through adopting above-mentioned technical scheme, bag collector is connected with electrostatic dust collector, and the resin particle through primary purification gets secondary purification in entering into electrostatic dust collector to discharge in the discharging pipe of electrostatic dust collector one side, by the unified collection of operating personnel. The electrostatic dust collector lower extreme is connected with auxiliary crusher, has the great copper granule of quality to be carried the back among the electrostatic dust collector in the resin granule, and the great copper granule of quality can fall into the electrostatic dust collector lower extreme, and then is carried to auxiliary crusher in, through crushing once more, reduces the quality of copper granule, then is carried back through fifth conveyer and is kept in the piece, obtains the secondary and selects separately. The waste of copper particles is reduced, the processing cost is reduced, and the purity of resin particles is also improved.

The invention is further configured to: the auxiliary crusher is positioned on one side of the electrostatic dust removal device, which is far away from the bag type dust removal device.

Through adopting above-mentioned technical scheme, the distance between auxiliary crusher and the piece of keeping in is nearer, shortens fifth conveyer's length, reduces entire system's space occupation area, improves space occupancy. The distance between the auxiliary crusher and the temporary storage piece is closer, so that the conveying time of the materials is shortened, and the processing efficiency of the PCB is improved.

The invention is further configured to: and one end of the fourth conveying pipe close to the dust hood is provided with a hand-operated valve.

Through adopting above-mentioned technical scheme, the hand valve is used for regulating and control the opening size of fourth conveying pipe, and then the wind-force size of control suction hood department, avoids the wind-force of suction hood department too big, inhales the suction hood with the copper granule in, causes the cost extravagant. When not using the fourth conveying pipe, seal the fourth conveying pipe through hand-operated valve, prevent that too much dust from entering into the fourth conveying pipe, and then lead to having a large amount of dusts in the subsequent dust removal mechanism, reduce the ability of clearing up the dust man-hour, also reduced dust removal mechanism's life.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the temporary storage hopper plays a temporary storage role, so that the PCB can be processed by the processing procedure before the reservation mechanism at the maximum working efficiency, the processing efficiency of the PCB is improved, and the sorting mechanism is provided with two specific gravity sorting machines, so that the screening efficiency of powdery particles is improved, and the processing efficiency of the PCB is further improved;

2. the first conveying device, the second conveying device, the third conveying device and the fourth conveying device use different material conveying methods according to different positions and different states of the PCB, so that the conveying time of the materials is shortened, and the processing efficiency of the PCB is improved;

3. copper particles in the dust particles are subjected to primary screening by a cyclone device and secondary screening by a specific gravity sorting machine, so that the finally collected copper particles have high purity;

4. the auxiliary crusher and the fifth conveying device reduce the waste of cost, automatically recover the loss, save the labor cost and save the resources.

Drawings

FIG. 1 is a schematic diagram of the overall structure shown in the embodiment of the present invention;

FIG. 2 is a cross-sectional view of the related structure of the crushing mechanism shown in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a related structure of a fine crusher according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the relevant structure of cyclonic separating apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic view of the internal structure of the sorting mechanism according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of a related structure of a lever operated valve according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a related structure of a bag-type dust collector according to an embodiment of the invention;

FIG. 8 is a schematic view of the structure of an auxiliary crusher according to an embodiment of the present invention;

FIG. 9 is an enlarged view of FIG. 7 illustrating an embodiment of the present invention;

fig. 10 is a schematic diagram of a related structure of an air purifier according to an embodiment of the present invention.

In the figure, 1, a feeding mechanism; 11. a conveyor belt; 12. a transfer motor; 13. a support; 2. a crushing mechanism; 21. a coarse crusher; 22. a pre-crusher; 23. a fine crusher; 3. a reservation mechanism; 31. a temporary storage hopper; 32. a cyclonic separating apparatus; 33. a temporary storage member; 4. a sorting mechanism; 41. a first proportion sorter; 411. a first screen; 412. a first vibrator; 413. a first blower; 42. a second specific gravity separator; 421. a second screen; 422. a second vibrator; 423. a second blower; 43. a discharge plate; 5. a dust removal mechanism; 51. a bag type dust removal device; 511. a dust removal feed pipe; 512. a dust removal screw; 513. a dust removal driver; 52. an electrostatic dust removal device; 521. a dust removal conveying pipe; 53. a discharge pipe; 54. a discharge chute; 55. an auxiliary crusher; 56. a fifth transport device; 57. a fifth negative pressure driver; 6. a first conveying device; 61. a first transfer pipe; 62. a first screw rod; 63. a first driver; 7. a second conveying device; 71. a second transfer tube; 72. a second negative pressure driver; 8. a third conveying device; 81. a third transfer tube; 82. a third screw rod; 83. a third driver; 84. a first feed pipe; 85. a second feed tube; 9. a fourth transfer device; 91. a dust hood; 92. a fourth transfer tube; 93. a fourth negative pressure driver; 94. manually pulling the valve; 100. an air purifier.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the copper powder recycling system for waste PCB boards disclosed by the invention comprises a feeding mechanism 1, wherein the feeding mechanism 1 comprises a support 13, a conveyor belt 11 is arranged inside the support 13, the feeding mechanism 1 is obliquely arranged, a conveying motor 12 is arranged on one side of the lower end of the support 13, and the conveying motor 12 is rotatably connected with the support 13 through a bearing. The conveying motor 12 is set as a rotating motor, and the conveying motor 12 drives the conveying belt 11 to move. The operator pours the sorted PCB boards onto the conveyor belt 11. Because the support 13 is integrally U-shaped, the PCB inclined on the conveyor belt 11 is not easy to fall outside the conveyor belt 11. An operator can dump a large number of PCB boards onto the conveyor belt 11, and then the feeding speed is accelerated.

Referring to fig. 2, the lower of the higher one end of conveyer belt 11 place height is equipped with crushing mechanism 2, and crushing mechanism 2 is including being located the coarse crusher 21 of conveyer belt 11 below, and coarse crusher 21 establishes to gear breaker, and coarse crusher 21 carries out preliminary breakage to the PCB board, reduces the whole volume of PCB board. A pre-crusher 22 is connected below the coarse crusher 21, the pre-crusher 22 is a blade type crusher, and the PCB processed by the pre-crusher 22 is cut into small pieces of PCB with the size of a coin.

Referring to fig. 3, the lower end of the pre-crusher 22 is connected with a first conveying device 6, the first conveying device 6 includes a first conveying pipe 61, a first screw rod 62 is disposed in the first conveying pipe 61, and a first driver 63 for driving the first screw rod 62 to rotate is disposed at one end of the first conveying pipe 61 away from the pre-crusher. The first driver 63 is provided as a rotary motor. The end of the first conveyor 6 remote from the pre-crusher 22 is connected to the upper end of a fine crusher 23. The PCB panel in the pre-crusher 22 is carried by the first screw 62 to the fine crusher 23, the fine crusher 23 is configured as a blade crusher, and the PCB panel passing through the fine crusher 23 is processed into powder particles, the main components of which include copper particles, resin particles and dust particles.

Referring to fig. 3, the lower end of the fine crusher 23 is connected with a second conveying device 7, and one end of the second conveying device 7 far away from the fine crusher 23 is connected with a reservation mechanism 3. The second conveying device 7 includes a second conveying pipe 71 and a second negative pressure driver 72, and the second negative pressure driver 72 is provided as a negative pressure motor. The operator, by activating the second underpressure drive 72, creates an underpressure in the second conveying pipe 71, so that the powder particles in the fine crusher 23 are influenced by the underpressure and are moved by the second conveyor 7 into the reservation means 3.

Referring to fig. 4, the reservation mechanism 3 includes a temporary storage hopper 31, a cyclone 32 is provided in the temporary storage hopper 31, the second conveyor 7 is connected to the upper half of the temporary storage hopper 31 and is communicated with the inside of the cyclone 32, the powder particles are separated by the rotation of the cyclone 32, so that the heavier copper particles in the powder particles are preferentially deposited to the lower end of the temporary storage hopper 31, and the lighter resin particles and dust particles in the powder particles are suspended at the upper end of the cyclone 32. The cyclone 32 preliminarily screens the powdery particles to preliminarily separate the copper particles from the resin particles and the dust particles.

Referring to fig. 4, the lower end of the temporary storage hopper 31 is connected with a temporary storage member 33, the powdered particles at the lower end of the temporary storage hopper 31 are stacked in the temporary storage member 33, the lower end of the temporary storage member 33 is connected with a third conveying device 8, the third conveying device 8 comprises a third conveying pipe 81, one end of the third conveying pipe 81 is connected with the bottom end of the temporary storage member 33, the other end is higher than the height of the end connected with the temporary storage member 33, and the third conveying pipe 81 is inclined. A third screw rod 82 is arranged in the third conveying pipe 81, one end, far away from the temporary storage part 33, of the third screw rod 82 is connected with a third driver 83, the third driver 83 is set as a rotating motor, and the third driver 83 drives the third screw rod 82 to rotate. The powder particles accumulated in the buffer 33 are transported by the third screw 82 to the end remote from the buffer 33.

Referring to fig. 4, one end of the third conveying pipe 81 far from the buffer 33 is connected with a first feeding pipe 84 and a second feeding pipe 85, the first feeding pipe 84 and the second feeding pipe 85 are connected with a sorting mechanism 4, and the sorting mechanism 4 comprises a first specific gravity sorting machine 41 connected with the first feeding pipe 84 and a second specific gravity sorting machine 42 connected with the second feeding pipe 85. The powder particles in the third conveying pipe 81 are fed into the first specific gravity classifier 41 and the second specific gravity classifier 42 through the first feeding pipe 84 and the second feeding pipe 85, respectively. The first feeding pipe 84 is located above the first gravity classifier 41 and connected to the upper end of the first gravity classifier 41, and the second feeding pipe 85 is located above the second gravity classifier 42 and connected to the upper end of the second gravity classifier 42.

Referring to fig. 5, the first specific gravity separator 41 is provided with a first screen 411, a first vibrator 412 is connected to the first screen 411, and the first vibrator 412 is a vibration motor. The first vibrator 412 vibrates the first screen 411 to increase kinetic energy of the powder particles on the first screen 411, wherein the heavier copper particles are located on the upper surface of the first screen 411, and the lighter resin particles and dust particles float in the air. The powder particles are continuously vibrated to detach the copper particles from the powder particles. The lower end of the first specific gravity separator 41 is provided with a first air blower 413, and the first air blower 413 blows air flow to the upper side of the first screen 411, so that resin particles and dust particles in the copper particles on the first screen 411 float to the upper side of the first screen 411, and the purity of the copper particles is further improved. One side of the first proportion sorter 41 is provided with a discharge plate 43, copper particles separated from the powder particles move to the discharge plate 43 by bumping, and an operator collects the copper particles on the discharge plate 43. The second specific gravity sorting machine 42 is provided with a second screen 421, a second vibrator 422, a second blower 423 and a discharge plate 43, and the connection mode and the movement mode of each device in the second specific gravity sorting machine 42 are the same as those of the first specific gravity sorting machine 41, which are not described in detail.

Referring to fig. 5 and 7, a fourth conveying device 9 is arranged above the discharging plate 43, the fourth conveying device 9 includes a dust hood 91 located above the discharging plate 43, a fourth conveying pipe 92 is connected to an upper end of the dust hood 91, one end of the fourth conveying pipe 92, which is far away from the sorting mechanism 4, is connected to the dust removing mechanism 5, and a fourth negative pressure driver 93 (marked in fig. 1) is connected to the fourth conveying pipe 92. The fourth negative pressure driver 93 (marked in fig. 1) is a negative pressure motor, and when the negative pressure motor is started, a negative pressure is formed in the fourth conveying pipe 92, so that the resin particles and the dust particles floating in the air move to the upper side of the discharging plate 43, then enter the dust hood 91, and enter the dust removing mechanism 5 along the fourth conveying pipe 92.

Referring to fig. 5 and 6, a hand-operated valve 94 is disposed at a port of the fourth conveying pipe 92 near the dust hood 91, and an operator can adjust and control the opening size of the fourth conveying pipe 92 by operating the hand-operated valve 94, so as to control the wind power at the dust hood 91, thereby preventing the copper particles from being sucked into the dust hood 91 due to excessive wind power, and causing resource waste. And the influence on the purity of the finally collected copper particles caused by too small wind force and too large impurity amount in the copper particles is also prevented.

Referring to fig. 7, the dust removing mechanism 5 includes a bag-type dust removing device 51 connected to the fourth conveying device 9, a dust removing feed pipe 511 is connected to a lower end of the bag-type dust removing device 51, an electrostatic dust removing device 52 is connected to an end of the dust removing feed pipe 511 far from the bag-type dust removing device 51, a dust removing screw rod 512 is disposed in the dust removing feed pipe 511, a dust removing driver 513 for driving the dust removing screw rod 512 to rotate is connected to an end of the dust removing feed pipe 511 near the bag-type dust removing device 51, and the dust removing driver 513 is a rotary motor. The powder particles purified by the bag-type dust collector 51 are conveyed to the electrostatic dust collector 52 through the dust-collecting feed pipe 511, the electrostatic dust collector 52 secondarily purifies the dust particles in the powder particles, and the copper particles carried in the powder particles or the unprocessed and sufficient PCB are screened out to fall to the lower end of the electrostatic dust collector 52.

Referring to fig. 8, a dust removal conveying pipe 521 is disposed at a lower end of the electrostatic dust removal device 52, the dust removal conveying pipe 521 is connected to an auxiliary crusher 55, and the auxiliary crusher 55 is located at a side of the electrostatic dust removal device 52 away from the bag-type dust removal device 51 (labeled in fig. 1). One end of the dust removal conveying pipe 521, which is far away from the electrostatic dust removal device 52, is connected with a dust removal driver, the dust removal driver is set as a rotating motor, and the dust removal driver drives a dust removal screw rod located in the dust removal conveying pipe 521 to rotate. Copper particles screened out by the electrostatic dust removal device 52 or unprocessed and fully processed PCB plates are pushed by the dust removal screw rod in the dust removal conveying pipe 521 to move into the auxiliary crusher 55, and then are crushed into powder particles by the auxiliary crusher 55 again. The auxiliary crusher 55 is connected with a fifth conveying device 56, a fifth negative pressure driver 57 is arranged on the fifth conveying device 56, the fifth negative pressure driver 57 is set to be a negative pressure motor, the powder particles in the auxiliary crusher 55 are influenced by negative pressure and move along the fifth conveying device 56, one end, far away from the auxiliary crusher 55, of the fifth conveying device 56 is connected with the temporary storage piece 33, and then the powder particles in the auxiliary crusher 55 move to the temporary storage piece 33 and are screened again.

Referring to fig. 9, a discharging pipe 53 is connected to a side of the electrostatic dust removing device 52 away from the bag-type temporary storage hopper 31 (marked in fig. 8), a discharging groove 54 is formed on the discharging pipe 53, and resin particles in the electrostatic dust removing device 52 are discharged from the discharging groove 54 and collected by an operator, so as to be reused.

Referring to fig. 10, the dust removing mechanism 5 is connected to an air cleaner 100, and air in the dust removing mechanism 5 enters the air cleaner 100, is purified, and is discharged to the outside.

The implementation principle of the embodiment is as follows: after the waste PCB enters the factory, an operator classifies the PCB and then respectively processes the waste PCB according to different types.

Operating personnel emptys old and useless PCB board on conveyer belt 11, because the conveyer belt 11 both sides are equipped with support 13 to operating personnel need not partly topple over the PCB board, can with the PCB board fast, a large amount of topple over in feed mechanism 1 for the material loading speed. The PCB board falls into the coarse crusher 21 following the movement of the conveyor belt 11, is crushed into blocks by the coarse crusher 21, then vertically falls into the pre-crusher 22, is crushed into blocks of coin size by the pre-crusher 22, then is conveyed into the fine crusher 23 by the first conveying device 6, and is processed into powder particles by the fine crusher 23.

Powdered particles are influenced by the negative pressure of the second conveying device 7, the powdered particles move to the cyclone separation device 32 along with the second conveying device 7, the powdered particles are primarily screened by the cyclone separation device 32, relatively heavier copper particles in the powdered particles preferentially fall into the temporary storage part 33 at the lower end of the temporary storage hopper 31, the accumulated powdered particles in the temporary storage part 33 are gradually conveyed to the first feeding pipe 84 and the second feeding pipe 85 by the third conveying device 8, then the powdered particles enter the first proportion sorting machine 41 and the second proportion sorting machine 42, the copper particles are screened by the first screen 411 or the second screen 421, the copper particles move to the discharging plate 43, and an operator recovers and bags the copper particles on the discharging plate 43.

Resin particles and dust particles with relatively light weight in the powder particles float above the discharging plate 43 under the action of the bumping of the first screen 411 or the second screen 421 and the blowing of the first air blower 413 or the second air blower 423, are sucked into the fourth conveying device 9 by the dust hood 91 and enter the bag-type dust collector 51 along the fourth conveying device 9, are subjected to primary purification of the bag-type dust collector 51, are reduced in dust particles, enter the electrostatic dust collector 52 through the dust-removing feeding pipe 511, are filtered by the electrostatic dust collector 52, and are collected and bagged through the discharging groove 54.

The copper particles with larger mass and the PCB boards with insufficient processing in the electrostatic dust removing device 52 fall into the dust removing conveying pipe 521, are conveyed into the auxiliary crusher 55, are crushed again, and then move into the temporary storage 33 along the fifth conveying device 56, and are screened again by the sorting device.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a copper powder cyclic regeneration utilizes system of old and useless PCB board which characterized in that: the device comprises a feeding mechanism (1), a crushing mechanism (2), a reservation mechanism (3), a sorting mechanism (4) and a dust removal mechanism (5), wherein the feeding mechanism (1) comprises a conveyor belt (11) and a conveyor motor (12), the crushing mechanism (2) comprises a coarse crusher (21) positioned below one end of the conveyor belt (11), the lower end of the coarse crusher (21) is connected with a pre-crusher (22), the lower end of the pre-crusher (22) is connected with a first conveying device (6), and one end, away from the pre-crusher (22), of the first conveying device (6) is connected with the upper end of a fine crusher (23);

the reservation mechanism (3) comprises a temporary storage hopper (31), the temporary storage hopper (31) is connected with the fine crusher (23) through a second conveying device (7), and a cyclone separation device (32) is arranged in the temporary storage hopper (31);

the sorting mechanism (4) comprises a first specific gravity sorting machine (41) and a second specific gravity sorting machine (42), the first specific gravity sorting machine (41) and the second specific gravity sorting machine (42) are connected with a temporary storage hopper (31) through a third conveying device (8), discharging plates (43) are arranged on the first specific gravity sorting machine (41) and the second specific gravity sorting machine (42), and a fourth conveying device (9) is arranged above the discharging plates (43);

the dust removal mechanism (5) comprises a bag type dust removal device (51) connected with a fourth conveying device (9), one side of the bag type dust removal device (51) is connected with an electrostatic dust removal device (52), one side of the electrostatic dust removal device (52) is provided with a discharge pipe (53), and the discharge pipe (53) is provided with a discharge chute (54);

the lower end of the temporary storage hopper (31) is connected with a temporary storage part (33), the third conveying device (8) is connected with the temporary storage part (33), the third conveying device (8) comprises a third conveying pipe (81), a third screw rod (82) is arranged in the third conveying pipe (81), a third driver (83) is arranged on the third conveying pipe (81), one end, far away from the temporary storage part (33), of the third conveying pipe (81) is connected with a first feeding pipe (84) located above the first proportion sorting machine (41) and a second feeding pipe (85) located above the second proportion sorting machine (42), the first feeding pipe (84) is connected with the first proportion sorting machine (41), and the second feeding pipe (85) is connected with the second proportion sorting machine (42);

the first specific gravity separator (41) is internally provided with a first screen (411), a first vibrator (412) and a first air blower (413), the second specific gravity separator (42) is internally provided with a second screen (421), a second vibrator (422) and a second air blower (423), the first air blower (413) is positioned below the first screen (411), and the second air blower (423) is positioned below the second screen (421);

the fourth conveying device (9) comprises a dust hood (91) positioned above the discharging plate (43), the upper end of the dust hood (91) is connected with a fourth conveying pipe (92), the fourth conveying pipe (92) is connected with a fourth negative pressure driver (93), and one end, far away from the discharging plate (43), of the fourth conveying pipe (92) is connected with the bag type dust removal device (51);

the lower end of the electrostatic dust removal device (52) is connected with a dust removal conveying pipe (521), one end, far away from the electrostatic dust removal device (52), of the dust removal conveying pipe (521) is connected with an auxiliary crusher (55), the auxiliary crusher (55) is connected with a fifth conveying device (56), and the fifth conveying device (56) is connected with a temporary storage piece (33);

and one end of the fourth conveying pipe (92) close to the dust hood (91) is provided with a hand-operated valve (94).

2. The copper powder recycling system for waste PCB boards as claimed in claim 1, wherein: the feeding mechanism (1) is obliquely arranged, the feeding mechanism (1) comprises a U-shaped support (13), the conveyor belt (11) is located inside the support (13), and the conveying motor (12) is located on one side of the support (13) and is rotationally connected with the support (13).

3. The copper powder recycling system for waste PCB boards as claimed in claim 1, wherein: the first conveying device (6) comprises a first conveying pipe (61), a first screw rod (62) is arranged in the first conveying pipe (61), and a first driver (63) for driving the first screw rod (62) to rotate is arranged on the upper surface of the first conveying pipe (61).

4. The copper powder recycling system for waste PCB boards as claimed in claim 1, wherein: the second conveying device (7) comprises a second conveying pipe (71), and a second negative pressure driver (72) is connected to the second conveying pipe (71).

5. The copper powder recycling system for waste PCB boards as claimed in claim 1, wherein: the auxiliary crusher (55) is positioned on one side of the electrostatic dust removal device (52) far away from the bag type dust removal device (51).