CN211191017U - PCB board copper powder recovery system - Google Patents

Abstract

The utility model discloses a PCB board copper powder recovery system relates to PCB board and handles recovery technical field, and its technical scheme main points are including cyclone and the sack cleaner by the blast pipe intercommunication, the blast pipe include first blast pipe and with the second blast pipe of first blast pipe intercommunication, first blast pipe communicates in cyclone, the second blast pipe communicates in the sack cleaner. An included angle between the axis of the first exhaust pipe and the axis of the second exhaust pipe is less than 180 degrees; the connection part of the first exhaust pipe and the second exhaust pipe is communicated with a receiving box for receiving dust, and the connection part of the first exhaust pipe and the second exhaust pipe is communicated with a guide part for guiding the dust to the receiving box. The bearing box is provided with a discharge pipe, and one end of the discharge pipe, which is far away from the bearing box, is connected with a separating device for separating copper particles. The utility model discloses can collect the dust in the combustion gas from cyclone, further separate the copper granule in the recovery dust, reduce the waste of copper granule.

Description

PCB board copper powder recovery system

Technical Field

The utility model relates to a PCB board is handled and is retrieved technical field, and more specifically says, it relates to a PCB board copper powder recovery system.

Background

Printed Circuit Boards (PCBs), also known as PCBs, are providers of electrical connections to electronic components. In the production process of the PCB, copper is the most important metal element in the circuit board, and is also the most important raw material and consumable of the circuit board. With the continuous improvement of the social living standard and the continuous increase of the consumption of electronic products, the replacement rate and the elimination rate of the electronic products are also continuously increased, and the treatment of the PCB in the waste electrical appliances, the reduction of the environmental pollution and the resource reutilization become global problems. Especially, if the copper metal in the PCB is not recycled, the waste of resources and environmental pollution will be caused.

The existing enterprises generally adopt the system shown in figure 1 to recover copper particles in materials after crushing waste PCB boards, and the system comprises a storage bin 1, a specific gravity separator 2, a cyclone separator 4 and a bag-type dust collector 7 which are sequentially arranged. The materials are sequentially passed through the specific gravity separator 2 and the cyclone separator 4 to separate copper particles in the materials, and an exhaust port of the cyclone separator 4 is connected to a bag-type dust remover 7 to purify air and remove dust. However, after the waste PCB is crushed, there are relatively fine copper particles, and during the process of collecting dust through the cyclone 4, the relatively fine copper particles in the material may escape into the air due to the smaller volume and specific gravity, and are discharged together with the gas; in addition, part of the copper particles may remain in the dust collected by the cyclone 4, which results in waste of part of the copper particles and environmental pollution.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a PCB board copper powder recovery unit, it can collect the dust in the combustion gas from cyclone, and the copper granule in the dust is retrieved in the further separation reduces the waste of copper granule.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a PCB (printed circuit board) copper powder recovery system comprises a cyclone separator and a bag-type dust collector which are communicated through exhaust pipes, wherein the cyclone separator comprises a feed pipe, an exhaust pipe and a discharge pipe, the bag-type dust collector comprises an air inlet pipe, the exhaust pipe comprises a first exhaust pipe and a second exhaust pipe communicated with the first exhaust pipe, the first exhaust pipe is communicated with the exhaust pipe of the cyclone separator, and the second exhaust pipe is communicated with the air inlet pipe of the bag-type dust collector;

an included angle between the axis of the first exhaust pipe and the axis of the second exhaust pipe is less than 180 degrees;

a receiving box for receiving dust is communicated with the joint of the first exhaust pipe and the second exhaust pipe, a guide part for guiding the dust to the receiving box is communicated with the joint of the first exhaust pipe and the second exhaust pipe, and the guide part is communicated with the receiving box;

the receiving box is provided with a discharge pipe, and the discharge pipe is provided with a first valve;

one end of the discharging pipe, which is far away from the receiving box, is connected with a separating device for separating copper particles.

Through adopting above-mentioned technical scheme, the contained angle between first blast pipe axis and the second blast pipe axis is less than 180 degrees for when gaseous via first blast pipe entering second blast pipe, the inside wall of second blast pipe is strikeed to gaseous dust, thereby the dust can drop to accept in the case. First valve initial state is the closed condition, and the dust is after receiving a large amount of aggregations in the case, can open first valve for the dust enters into separator through arranging the material pipe, thereby separates the copper granule in the dust and retrieves, reduces copper metal's waste.

Further, the guide part is in a hollow hemispherical shape.

Through adopting above-mentioned technical scheme, dust in the gas can fall in the receiving box under the effect of guide part when the inside wall whereabouts of striking second blast pipe, reduces the possibility that the dust falls in the sack cleaner via the second blast pipe.

Further, the guide portion is funnel-shaped.

Through adopting above-mentioned technical scheme, dust in the gas can fall in the receiving box under the effect of guide part when the inside wall whereabouts of striking second blast pipe, reduces the possibility that the dust falls in the sack cleaner via the second blast pipe.

Further, the separation device comprises an electrostatic separator, a discharge pipe of the cyclone separator is communicated with a hopper, the hopper is provided with a conveying device, and the conveying device is communicated with the electrostatic separator;

the material discharging pipe of the receiving box is communicated with the hopper.

Through adopting above-mentioned technical scheme, probably remain the copper granule that is not separated the recovery in the waste material that discharges through cyclone, utilize conveyor to carry the waste material to further separate the recovery copper granule in electrostatic separation machine to reduce the waste of copper metal. After accepting the case and collecting a large amount of dust, can open first valve, make the dust enter into the hopper through arranging the material pipe in, and then further separate the recovery in being carried the electrostatic separation machine to reduce copper metal's waste.

Further, the conveying device comprises a screw conveyor.

Through adopting above-mentioned technical scheme, utilize during screw conveyer carries the material in with the hopper to electrostatic separation machine, utilize electrostatic separation machine to separate out and then retrieve the copper particle in the material.

Furthermore, the exhaust device further comprises a plurality of third exhaust pipes, wherein two ends of each third exhaust pipe are respectively communicated with the second exhaust pipes and the bag-type dust remover, the air inlet pipe of the bag-type dust remover is provided with a plurality of air inlet pipes, and the air inlet pipes are in one-to-one correspondence with the third exhaust pipes.

Through adopting above-mentioned technical scheme, utilize many third blast pipes to carry the sack cleaner with gas to improve the whole efficiency that gas was carried in the sack cleaner.

Furthermore, the number of the third exhaust pipes is two, the second exhaust pipe is provided with a three-way valve, and the three-way valve comprises an inlet and two outlets;

the second exhaust pipes are connected to the inlets of the three-way valves, and the two third exhaust pipes are detachably connected to the two outlets of the three-way valves respectively;

the intake pipe of sack cleaner is equipped with two, and every intake pipe all is equipped with the second valve, and the one end that the three-way valve was kept away from to the third blast pipe can be dismantled and communicate in the intake pipe.

Through adopting above-mentioned technical scheme, when needing to clear up or change the third blast pipe, one of them third blast pipe is plugged up to usable three-way valve shutoff, closes corresponding second valve simultaneously, makes during gaseous via another third blast pipe gets into the sack cleaner to realize not influencing the sack cleaner again and discharging the normal dust removal of gas when clearing up or changing the third blast pipe.

To sum up, the utility model discloses following beneficial effect has:

1. the included angle between the axis of the first exhaust pipe and the axis of the second exhaust pipe is smaller than 180 degrees, so that dust in the gas falls into the receiving box after impacting the inner side wall of the second exhaust pipe, and then copper particles are further separated and recovered, and the waste of the copper particles is reduced;

2. the row of material pipe of holding the case communicates in the hopper for during the dust falls the hopper, and then is carried to do further separation by screw conveyer and retrieve the copper granule in the electrostatic separation machine, reduced the waste of copper granule.

Drawings

FIG. 1 is a schematic diagram showing the overall structure of a system for recovering copper particles from a material according to the prior art;

FIG. 2 is a schematic diagram showing the overall structure of a PCB copper powder recycling system in embodiment 1;

FIG. 3 is a schematic view showing the structure of an exhaust pipe, a receiving box and a hopper in example 1;

FIG. 4 is a schematic structural view of an exhaust pipe, a receiving box and a hopper in example 2;

FIG. 5 is a schematic structural view of a three-way valve, a third exhaust pipe, and an intake pipe in embodiment 2;

fig. 6 is a schematic structural view of a slot and a seal groove in embodiment 2.

In the figure: 1. a storage bin; 2. a specific gravity separator; 3. a negative pressure feeding machine; 4. a cyclone separator; 41. a feed pipe; 42. an air outlet pipe; 43. a discharge pipe; 44. an exhaust pipe; 441. a first exhaust pipe; 442. a second exhaust pipe; 443. A third exhaust pipe; 4431. a second flange; 4432. a card slot; 45. a guide portion; 46. a three-way valve; 461. an inlet; 462. an exhaust passage; 4620. an outlet; 4621. a first flange; 4622. inserting a tube; 4623. a snap ring; 463. a bolt; 5. a hopper; 6. a receiving box; 61. a discharge pipe; 62. a first valve; 7. a bag-type dust collector; 71. an air inlet pipe; 72. a second valve; 73. a third flange; 74. a sealing groove; 8. a screw conveyor; 9. an electrostatic classifier.

Detailed Description

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

Example 1:

the utility model provides a PCB board copper powder recovery system, refers to figure 2, including the feed bin 1 that is used for saving old and useless PCB board material after the breakage, feed bin 1 intercommunication has screw conveyer 8, and screw conveyer 8 intercommunication has proportion sorter 2, utilizes screw conveyer 8 to carry the material in the feed bin 1 to the proportion sorter 2 in separate the copper granule in the recovery material. The specific gravity sorting machine 2 is communicated with a negative pressure feeding machine 3, the negative pressure feeding machine 3 is communicated with a cyclone separator 4, the negative pressure feeding machine 3 can be used for conveying the materials with most of copper particles removed in the specific gravity sorting machine 2 to the cyclone separator 4, and then the residual materials are recovered and processed in a centralized manner.

Referring to fig. 2 and 3, the cyclone separator 4 is provided with a feeding pipe 41, an air outlet pipe 42 and a discharging pipe 43, the discharging pipe 43 is positioned at the bottom end of the cyclone separator 4 and communicated with the hopper 5, the bottom end of the hopper 5 is communicated with the screw conveyor 8, and the screw conveyor 8 is communicated with the electrostatic classifier 9. The materials in the hopper 5 can be conveyed to the electrostatic separator 9 by the screw conveyer 8, and a small part of copper particles remained in the materials are further separated and recovered. The outlet duct 42 of cyclone 4 is connected with blast pipe 44, and the one end that cyclone 4 was kept away from to blast pipe 44 communicates in sack cleaner 7, utilizes sack cleaner 7 to carry out the dust treatment back to gas, discharges gas again in the environment, avoids the polluted environment.

Referring to fig. 3, exhaust pipe 44 includes first exhaust pipe 441 and second exhaust pipe 442, and an angle between an axis of first exhaust pipe 441 and an axis of second exhaust pipe 442 is less than 180 degrees, so that first exhaust pipe 441 and second exhaust pipe 442 form an inverted V-shape. A funnel-shaped guide portion 45 is communicated with a joint of the first exhaust pipe 441 and the second exhaust pipe 442, and the guide portion 45 is located at an included angle between the first exhaust pipe 441 and the second exhaust pipe 442. The guide part 45 is communicated with the square receiving box 6, the bottom end of the receiving box 6 is funnel-shaped and is provided with a discharging pipe 61, and one end, far away from the receiving box 6, of the discharging pipe 61 is connected to the outer side wall of the hopper 5 and is communicated with the inside of the hopper 5.

Referring to fig. 3, the discharge conduit 61 is provided with a first valve 62 adjacent the receiving box 6. When the gas enters the exhaust pipe 44 from the cyclone 4, the solid particles in the gas fall down after impacting the inner side wall of the second exhaust pipe 442 due to the included angle between the first exhaust pipe 441 and the second exhaust pipe 442, and the solid particles fall down into the receiving box 6 under the guidance of the guide part 45. Since the cyclone 4 has recovered most of the material to the hopper 5 and the gas exiting the cyclone 4 contains a lower content of solid particles, the first valve 62 may be closed first. After the receiving box 6 collects a large amount of solid particles, the first valve 62 is opened, so that the solid particles in the receiving box 6 fall into the hopper 5 through the discharging pipe 61, and are further separated through the subsequent electrostatic separator 9, and a small amount of residual copper particles in the materials are recovered.

Referring to fig. 3, two third exhaust pipes 443 are communicated with one end of the second exhaust pipe 442 away from the first exhaust pipe 441, and both ends of the two third exhaust pipes 443 away from the second exhaust pipe 442 are communicated with the same bag-type dust collector 7. The bag-type dust collector 7 is used for filtering the gas, so that the gas is purified and then is discharged to the environment, and the possibility of environmental pollution is reduced.

The working principle is as follows: the PCB is stored in the stock bin 1 after being crushed, materials in the stock bin 1 are conveyed to the specific gravity sorting machine 2 through the screw conveyer 8, and copper particles in the materials are separated and recovered through the specific gravity sorting machine 2. The material with most of copper particles removed in the specific gravity separator 2 is conveyed into the cyclone separator 4 by the negative pressure feeding machine 3, the material with most of copper particles removed is recovered and centralized by the cyclone separator 4, and the gas is discharged from the gas outlet pipe 42. The recovered materials are collected in the hopper 5, conveyed to the electrostatic separator 9 by the screw conveyer 8 and further separated, and then the residual copper particles in the materials are recovered.

The gas from the cyclone 4 is discharged via a gas discharge pipe 44 to a bag-type dust collector 7 for purification and finally to the environment. When the gas passes through the gas exhaust pipe 44, the solid particles in the gas collide with the inner side wall of the second gas exhaust pipe 442 and fall into the receiving box 6, after a large amount of solid particles are collected by the receiving box 6, the first valve 62 is opened, the solid particles fall into the hopper 5 through the discharge pipe 61, and the solid particles are further separated by the electrostatic separator 9, so that the residual copper particles are recovered.

Compared with the prior art, the solid particles in the gas discharged from the cyclone separator 4 are recovered, so that the solid particles are further separated; in addition, the materials discharged from the cyclone separator 4 are further separated, so that the residual copper particles are recovered, the waste of the copper particles can be reduced, and the recovery rate of copper metal is improved.

Example 2:

a PCB board copper powder recovery system, refer to FIG. 4 and FIG. 5, based on embodiment 1, the difference between this embodiment and embodiment 1 is: the first exhaust pipe 441 and the second exhaust pipe 442 are V-shaped, and the guide portion 45 is hemispherical. The end of the second exhaust pipe 442 remote from the first exhaust pipe 441 is provided with a three-way valve 46, the three-way valve 46 comprises an inlet 461 and two exhaust pipes 462, and the exhaust pipes 462 are provided with outlets 4620. The inlet 461 is connected to the second exhaust pipe 442, and the two outlets 4620 are connected to a third exhaust pipe 443 respectively.

Referring to fig. 5 and 6, the exhaust ports 462 of the three-way valve 46 are each provided with a first flange 4621, the end of the third exhaust pipe 443 is provided with a second flange 4431, and the first flange 4621 and the second flange 4431 are detachably connected by bolts 463. An inner peripheral side wall of the third exhaust pipe 443 is provided with an annular notch 4432 near an end portion in the circumferential direction of the third exhaust pipe 443. An insertion tube 4622 is arranged at the end part of the exhaust passage 462, an annular clamping ring 4623 is arranged on the peripheral side wall of the insertion tube 4622 along the circumferential direction of the insertion tube 4622, and the clamping ring 4623 is made of elastic rubber. After the insertion tube 4622 is inserted into the third exhaust pipe 443, the snap ring 4623 is snapped into the snap groove 4432 to seal the second exhaust pipe 442 and the third exhaust pipe 443.

Referring to fig. 4 and 6, the bag-type dust collector 7 has two inlet pipes 71, the two inlet pipes 71 are respectively connected to a third exhaust pipe 443, and the two inlet pipes 71 are respectively provided with a second valve 72. Also, an end of the third exhaust pipe 443 remote from the second exhaust pipe 442 is provided with a second flange 4431 and a insertion tube 4622, an annular snap ring 4623 is provided on an outer peripheral side wall of the insertion tube 4622 along a circumferential direction of the insertion tube 4622, and the snap ring 4623 is made of elastic rubber. The intake pipe 71 is provided with a third flange 73, and the inner peripheral side wall of the intake pipe 71 is provided with a seal groove 74 in the circumferential direction of the intake pipe 71. The second flange 4431 and the third flange 73 are detachably connected by bolts 463.

In this embodiment, one of the third exhaust pipes 443 can be blocked by the three-way valve 46, and the corresponding second valve 72 is closed at the same time, so that the gas enters the bag-type dust collector 7 through the other third exhaust pipe 443, thereby achieving normal dust removal and discharge of the bag-type dust collector 7 without affecting the normal dust removal and discharge of the gas while cleaning or replacing the third exhaust pipe 443.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws and protection within the scope of the present invention.

Claims (7)

1. The utility model provides a PCB board copper powder recovery system, includes cyclone (4) and sack cleaner (7) by blast pipe (44) intercommunication, cyclone (4) include inlet pipe (41), outlet duct (42) and discharging pipe (43), sack cleaner (7) include intake pipe (71), its characterized in that: the exhaust pipe (44) comprises a first exhaust pipe (441) and a second exhaust pipe (442) communicated with the first exhaust pipe (441), the first exhaust pipe (441) is communicated with the exhaust pipe (42) of the cyclone separator (4), and the second exhaust pipe (442) is communicated with the intake pipe of the bag-type dust collector (7);

the included angle between the axis of the first exhaust pipe (441) and the axis of the second exhaust pipe (442) is less than 180 degrees;

a receiving box (6) for receiving dust is communicated with the joint of the first exhaust pipe (441) and the second exhaust pipe (442), a guide part (45) for guiding the dust to the receiving box (6) is communicated with the joint of the first exhaust pipe (441) and the second exhaust pipe (442), and the guide part (45) is communicated with the receiving box (6);

the receiving box (6) is provided with a discharge pipe (61), and the discharge pipe (61) is provided with a first valve (62);

one end of the discharging pipe (61) far away from the receiving box (6) is connected with a separating device for separating copper particles.

2. The PCB board copper powder recovery system of claim 1, wherein: the guide part (45) is in a hollow hemispherical shape.

3. The PCB board copper powder recovery system of claim 1, wherein: the guide portion (45) is funnel-shaped.

4. The PCB board copper powder recovery system of claim 1, wherein: the separation device comprises an electrostatic separator (9), a discharge pipe (43) of the cyclone separator (4) is communicated with a hopper (5), the hopper (5) is provided with a conveying device, and the conveying device is communicated with the electrostatic separator (9);

the discharge pipe (61) of the receiving box (6) is communicated with the hopper (5).

5. The PCB board copper powder recovery system of claim 4, wherein: the conveying device comprises a screw conveyor (8).

6. The PCB board copper powder recovery system of claim 1, wherein: the exhaust device is characterized by further comprising a plurality of third exhaust pipes (443), wherein two ends of each third exhaust pipe (443) are respectively communicated with the second exhaust pipe (442) and the bag-type dust collector (7), a plurality of air inlet pipes (71) of the bag-type dust collector (7) are arranged, and the air inlet pipes (71) are in one-to-one correspondence with the third exhaust pipes (443).

7. The PCB board copper powder recovery system of claim 6, wherein: the number of the third exhaust pipes (443) is two, the second exhaust pipe (442) is provided with a three-way valve (46), and the three-way valve (46) comprises an inlet (461) and two outlets (4620);

the second exhaust pipe (442) is connected to an inlet (461) of the three-way valve (46), and the two third exhaust pipes (443) are respectively detachably connected to two outlets (4620) of the three-way valve (46);

intake pipe (71) of sack cleaner (7) are equipped with two, and every intake pipe (71) all is equipped with second valve (72), and the one end that three-way valve (46) were kept away from in third blast pipe (443) can be dismantled and communicate in intake pipe (71).

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