CN110181715B

CN110181715B - Separation method of waste resin for preparing plastic-wood particles

Info

Publication number: CN110181715B
Application number: CN201910447520.XA
Authority: CN
Inventors: 陈生荣; 钱程; 钱春英; 史占行
Original assignee: Jiangsu Luneng Plastic Wood Technology Co ltd
Current assignee: Jiangsu Luneng Plastic Wood Technology Co ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2021-11-02
Anticipated expiration: 2039-05-27
Also published as: CN110181715A

Abstract

The invention relates to a method for separating waste resin for preparing plastic-wood particles, which comprises the following steps: s1, conveying the material containing the waste resin into a pre-cooling container, closing an input port and an output port of the pre-cooling container, inputting liquid nitrogen into the pre-cooling container, and cooling the material in the pre-cooling container; s2, sending the cooled material to a crusher to be crushed into material blocks with the thickness of 1-3 mm; s3, conveying the material blocks into a temporary storage device through a first conveying mechanism, and inputting liquid nitrogen into the temporary storage device; s4, conveying the material blocks in the temporary storage device to a high-speed crusher through a second conveying mechanism, and crushing to obtain a mixed material of resin powder particles and metal powder particles; s5, sending the mixture to an eddy current separator for primary separation; s6, the mixture output from the eddy current separator is sent to the electrostatic separator by the third conveying mechanism to be separated for the second time. The method of the invention has the advantage of improving the separation efficiency.

Description

Separation method of waste resin for preparing plastic-wood particles

Technical Field

The invention relates to the technical field of waste resin separation, in particular to a method for separating waste resin for preparing plastic-wood particles.

Background

According to incomplete statistics, about 2 million tons of organic resin wastes are generated by various local enterprises in the Yixing area every year, more than 10 million tons of organic resin wastes are generated in Suxi Changsi, only few organic resin waste disposal enterprises in the Suxi Changsi are available at present, most of the enterprises dispose the organic resin wastes through burning, serious waste gas pollution is generated, the disposal mode is not available, and few enterprises for recycling and comprehensive utilization are available.

The printed circuit board is used as one kind of organic resin waste, and the printed circuit board is used as a basic component of various electric appliances and equipment and is composed of a substrate and an electronic element; the electronic element is welded on the substrate through metal tin; the substrate is made by wrapping a copper sheet by a resin material; the electronic components contain high-value-added metals such as gold and silver.

In printed circuit boards, the metal content is as high as 40%, while the mineral-rich metal content in nature is also 3-5%. At best, copper is used, and in addition, metals such as gold, aluminum, nickel, lead, silicon, etc., are available, among which rare metals are not present. Statistical data show that the gold content in each ton of waste circuit board reaches about 1000 g. At present, with the improvement of the process level and the reduction of the cost, about 300 g of gold can still be extracted from each ton of waste circuit boards, and the market price is about 3 ten thousand yuan. Therefore, the metals contained in the so-called "electronic waste" are tens or even hundreds of times greater than those contained in natural deposits.

In the prior art, a printed circuit board is crushed and then crushed to obtain a mixture of resin and metal powder, and then the resin and the metal powder are separated by an electrostatic separation device to obtain the metal powder and the resin powder. However, since the printed circuit board has a large amount of thermosetting resin, and these resin polymers have the characteristics of hardness, strength, high temperature resistance, and certain toughness at normal temperature, and cannot be crushed by common impact and direct extrusion crushing methods, there are various problems in crushing and recycling at normal temperature, such as impact pyrolysis, harmful gas generation, dust pollution in dry crushing, non-uniform product particle shape, and easy generation of a large amount of heat during long-time operation of equipment, which causes local overheating of equipment, material adhesion, equipment blockage, etc., and these problems may cause environmental pollution, reduce crushing efficiency, and cause a reduction in subsequent separation efficiency.

Disclosure of Invention

The invention aims to provide a method for separating waste resin for preparing plastic-wood particles, which improves the separation efficiency.

A method for separating waste resin used for preparing plastic-wood particles comprises the following steps:

s1, conveying the material containing the waste resin into a pre-cooling container, closing an input port and an output port of the pre-cooling container, inputting liquid nitrogen into the pre-cooling container, cooling the material in the pre-cooling container, and controlling the cooling time to be 5-15 minutes to embrittle the material;

s2, sending the cooled material to a crusher to be crushed into material blocks with the thickness of 1-3 mm;

s3, conveying the material blocks into a temporary storage device through a first conveying mechanism, and inputting liquid nitrogen into the temporary storage device to keep the material blocks brittle;

s4, conveying the material blocks in the temporary storage device to a high-speed pulverizer through a second conveying mechanism, and pulverizing to obtain a mixed material of resin powder particles and metal powder particles, wherein the particle size of the resin powder particles and the particle size of the metal powder particles are 0.05-0.5 mm;

s5, sending the mixture into an eddy current separator for primary separation, wherein the eddy current separator generates a high-frequency alternating magnetic field to generate induced eddy currents in the non-magnetic conductor metal powder particles, and the non-magnetic conductor metal powder particles are separated from the mixture by thrust;

and S6, conveying the mixture output from the eddy current separator to an electrostatic separation device through a third conveying mechanism for secondary separation, and separating metal powder particles and resin powder particles through the electrostatic separation device to obtain the resin powder particles for preparing the plastic-wood particles.

The invention has the advantages that: because the material has cooled off in the precooling container, consequently, the material absorbs the heat of the air in the breaker after entering into the breaker for the air temperature in the breaker reduces, because the thing effect of inhaling that low temperature material self has, the material absorbs the heat that produces when broken in crushing process, has avoided causing the local overheat of equipment, the production of material bonding, jam equipment scheduling problem. The temporary storage device is used for temporarily storing the material blocks to keep the material blocks fragile, when the material blocks kept fragile are crushed, the low-temperature materials absorb part of heat generated in the process of the crushing cavity, sharp temperature rise in the crusher and deformation of the particles are effectively prevented, the particles are enabled to have smooth surfaces, and follow-up sorting is facilitated. After the metal powder particles of the non-magnetic conductor are sorted by the eddy current sorting machine, the electrostatic sorting device sorts the mixed materials again, so that the burden is reduced, and meanwhile, the powder particles have the characteristic of smooth surfaces and can be well attached to the electrostatic sorting device during electrostatic sorting. In conclusion, the method of the invention improves the separation efficiency of the resin powder particles and the metal powder particles.

Drawings

FIG. 1 is a schematic view of a separation system of a waste resin for manufacturing plastic-wood particles according to the present invention;

FIG. 2 is a schematic view of the crusher of the present invention;

FIG. 3 is a schematic structural diagram of a temporary storage apparatus according to the present invention;

FIG. 4 is a schematic view of the structure of an eddy current separator in the present invention;

FIG. 5 is a schematic view of the electrostatic classifier of the present invention;

FIG. 6 is a schematic view of a vibratory feed mechanism of the present invention;

FIG. 7 is a constructional view of the internal parts of the vibratory feed mechanism of FIG. 6;

reference numbers in the drawings:

1 is a precooling container, 2 is a liquid nitrogen tank, A is a crusher, 3 is a first hopper, 4 is a box body, 5 is a first shaft, 5a is a first gear transmission mechanism, 6 is a shearing part, 7 is a bulge part, 8 is a first cutter shaft, 9 is a cutter head, 10 is a second gear transmission mechanism, 11 is a first conveying mechanism, B is a temporary storage device, 12 is a temporary storage box body, 13 is a belt transmission mechanism, 14 is a pushing mechanism, 15 is a filling part, 16 is a baffle, 17 is a second conveying mechanism, C is a high-speed crusher, D is an eddy current separator, 18 is a shell, 18a is a feed inlet, 19 is a separation magnetic roller, 20 is a first accommodating cavity, 21 is a motor, 22 is a speed reducer, 23 is a coupler, 24 is a screw rod, 25 is a first net-shaped part, 25a is a notch, 26 is a first transmission shaft, 27 is a first disc-shaped part, 28 is a first stirring and dispersing part, 29 is a first eccentric transmission part, 30 is a third conveying mechanism, E is an electrostatic sorting device, 31 is a material guide plate, 32 is a corona electrode, 33 is a rotary separating roller, 34 is a static electrode, 35 is a brush, F is a vibration feeding mechanism, 36 is a cylinder, 36a is an output port, 37 is a spring plate, 37a is a friction part, 38 is a first supporting part, 39 is a chamber, 40 is an elastic part, a is an armature, and b is a coil.

Detailed Description

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

As shown in fig. 1, the method for separating waste resin for preparing plastic-wood particles according to the present invention comprises the steps of:

s1, conveying the material containing the waste resin into the pre-cooling container 1, closing the input and output ports of the pre-cooling container 1, inputting liquid nitrogen into the pre-cooling container 1, cooling the material in the pre-cooling container, and controlling the cooling time to be 5-15 minutes to embrittle the material; the material can be waste circuit boards, waste tires and the like. After the material containing the waste resin is cooled and embrittled, because the crushing heat of the material becomes small, the material is prevented from being adhered in the crushing and crushing processes, and the material is easy to crush and crush.

And liquid nitrogen is stored in a liquid nitrogen tank 2, after the materials are loaded into the pre-cooling container 1, a control valve of the liquid nitrogen tank 2 is opened, and the liquid nitrogen in the liquid nitrogen tank 2 is input into the pre-cooling container. The liquid nitrogen rapidly cools the material in the pre-cooling container 1, a first temperature sensor is mounted on the pre-cooling container 1 and used for detecting the temperature in the pre-cooling container 1, so that the temperature in the pre-cooling container 1 is controlled to be-80 ℃ to-110 ℃, preferably the temperature in the pre-cooling container 1 is controlled to be-100 ℃, and thus the material is embrittled within 7-8 minutes.

S2, sending the cooled material to a crusher to be crushed into material blocks with the thickness of 1-3 mm; the crusher is communicated with the precooling container 1, a valve is arranged at the output end of the precooling container 1, and the material in the precooling container 1 can enter the crusher by opening the valve.

As shown in fig. 1 and 2, the crusher a includes a first hopper 3, a box 4, a first crushing mechanism, and a second crushing mechanism, where the first hopper 3 is used to receive cooled materials output by the pre-cooling container 1, and one end of the box 4 is connected to the first hopper 3; the first crushing mechanism is arranged on the box body 4 and is used for pre-crushing the material entering the box body 4 in a shearing mode; the second crushing mechanism is arranged on the box body 4 and located at the downstream of the first crushing mechanism, and the second crushing mechanism is used for crushing the pre-crushed materials into material blocks of 1-3 mm.

As shown in fig. 1 and 2, the first crushing mechanism includes a first shaft 5, a second shaft, both ends of the first shaft 5 are rotatably supported on the box body 4, and both ends of the second shaft are rotatably supported on the box body; the first shaft 5 and the second shaft are respectively and rotatably supported on the box body 4 through first bearing assemblies, one end of the first shaft 5 and one end of the second shaft are provided with a first gear transmission mechanism 5a for driving the first shaft 5 and the second shaft to rotate, the shaft bodies of the first shaft 5 and the second shaft are respectively provided with a shearing part 6, and the shearing parts 6 are cutterheads with sawteeth. The shearing parts 6 on the shaft bodies of the first shaft 5 and the second shaft are arranged in a staggered mode, when materials fall onto the first shaft 5 and the second shaft, the materials are sheared by the shearing parts 6 on the other shaft by taking one shaft as an anvil block, and therefore the materials are crushed for the first time by the first crushing mechanism.

As shown in fig. 1 and 2, because the shearing parts 6 on the shaft bodies of the first shaft 5 and the second shaft are arranged in a staggered manner, and because the transverse distance between the shearing part 6 on the first shaft 5 and the shearing part 6 on the second shaft is relatively large, a large blank part exists between two adjacent shearing parts 6 on the two shafts, some materials or parts of the materials do not pass through the shearing part 6 to be sheared, and pass through the gap between the first shaft 5 and the second shaft and fall into the second crushing mechanism, so that the load of the second crushing mechanism can be increased. Therefore, in this embodiment, the shaft bodies of the first shaft 5 and the second shaft are further provided with the protruding portions 7 respectively, the protruding portions 7 are located between two adjacent shearing portions 6, when some materials or parts of the materials do not pass through the shearing portions 6, and pass through the non-shearing neutral portion, the materials are crushed by squeezing the materials through the protruding portions 7, so that the subsequent second crushing mechanism is facilitated to crush the materials.

As shown in fig. 1 and 2, the second crushing mechanism includes a first cutter shaft 8, a second cutter shaft and a cutter head 9, both ends of the first cutter shaft 8 are rotatably supported on the box body 4, and both ends of the second cutter shaft are rotatably supported on the box body; the first cutter shaft 8 and the second cutter shaft are supported on the box body 4 through second bearing assemblies respectively. The cutter head 9 is arranged on the first cutter shaft 8 and the second cutter shaft, the cutter head 9 is a gear cutter head, and the pre-crushed material is cut into material blocks with the sizes of 1-3 mm when the cutter head 9 rotates. One end of the first cutter shaft 8 and one end of the second cutter shaft are provided with a second gear transmission mechanism 10 for driving the first cutter shaft and the second cutter shaft to rotate.

Because the material has cooled off in precooling container 1, consequently, the material absorbs the heat of the air in the breaker after entering into the breaker for the air temperature in the breaker reduces, because the thing effect of inhaling that low temperature material self has, the material absorbs the heat that produces when broken at the crushing in-process, has avoided causing the local overheat of equipment, the material bonds, blocks up the production of equipment scheduling problem.

S3, the material is crushed after being crushed, because the crushing speed is always slower than the crushing speed, the material of the invention is cooled, if the material blocks obtained by crushing are not stored specially, the brittleness possessed by the cooled material can be lost when the material blocks are stacked at normal temperature, which is unfavorable for the subsequent crushing process. Therefore, as shown in fig. 1, in the present invention, the lump material obtained in S2 is transferred to the temporary storage apparatus B by the first transfer mechanism 11 (the first transfer mechanism 11 is preferably a screw conveyor), liquid nitrogen is supplied to the temporary storage apparatus B to keep the lump material brittle, and the cooling temperature in the temporary storage apparatus is controlled to be-40 to-60 ℃. When the fragile material block is crushed, the low-temperature material absorbs part of heat generated in the process of the crushing cavity, so that sharp temperature rise in the crusher and deformation of particles are effectively prevented, the particles have smooth surfaces, and subsequent separation is facilitated. Therefore, it is very advantageous for the crushing process to temporarily store the pieces of material and to maintain the temperature of the pieces of material.

As shown in fig. 1 and 3, the temporary storage device B includes a temporary storage box 12 for temporarily storing the material blocks, a belt transmission mechanism 13, and a material pushing mechanism 14. The belt transmission mechanism 13 is installed in the temporary storage box body 12, and the belt transmission mechanism 13 is used for bearing the material blocks sent by the temporary storage first conveying mechanism 11 and conveying the temporary storage material blocks to the output port of the temporary storage box body 12. The belt transmission mechanism 13 comprises a belt wheel, a belt and a rotary driver, the belt wheel is flexibly matched with the belt, the rotary driver is connected with the belt wheel, the rotary driver can adopt a hydraulic motor or a motor with a speed reducer, and the belt transmission mechanism 13 is adopted to bear and convey the material blocks, so that the material blocks can be prevented from falling to the bottom of the temporary storage box body 12 and being blocked by the belt transmission mechanism 13 because the belt is a continuous solid part and no hole is reserved on the belt.

As shown in fig. 1 and 3, since the first conveying mechanism 11 continuously feeds the material pieces into the temporary storage tank body 12, the material pieces fall from the input port of the temporary storage tank body 12 to the belt transmission mechanism 13, and the material pieces are piled up along with the continuous conveying, the material pieces are unevenly distributed on the belt transmission mechanism 13, and the problem of blocking the input port of the temporary storage tank body 12 along with the continuous accumulation exists. Therefore, in the invention, the temporary storage box body 12 is provided with the material pushing mechanism 14, the material pushing mechanism 14 pushes the material blocks stacked on the belt transmission mechanism corresponding to the lower part of the input port of the temporary storage box body 12 to disperse the material blocks on the belt transmission mechanism 13, one part of the material pushing mechanism is positioned outside the temporary storage box body 12, and the other part of the material pushing mechanism 14 is positioned in the temporary storage box body and above the belt transmission mechanism.

As shown in fig. 1 and 3, the pushing mechanism 14 includes a linear driver and a pushing plate, the linear driver may adopt linear driving components such as an air cylinder and an oil cylinder, one end of the linear driver extends into the temporary storage box 12, one end of the linear driver is connected with the pushing plate, and the linear driver drives the pushing plate to move linearly, so as to push the stacked material blocks to other positions on the belt transmission mechanism 13.

As shown in fig. 1 and 3, since there is a gap between one end of the belt driving mechanism 13 and the inner wall surface of the buffer tank body 12, in order to prevent the material pieces from falling into the bottom of the buffer tank body 12 from the gap, in the present invention, the buffer device further includes a filling member 15 for preventing the material pieces from falling between one end of the belt driving mechanism 13 and the inner wall surface of the buffer tank body 12, and the filling member 15 is fitted between one end of the belt driving mechanism 13 and the inner wall surface of the buffer tank body 12.

As shown in fig. 1 and 3, the temporary storage device further includes a baffle 16, one end of the baffle 16 is located at the output port of the temporary storage box body 12, the other end of the baffle 16 is matched with the other end of the belt transmission mechanism 13, and the baffle 16 shields the other end of the belt transmission mechanism 13 to prevent the material blocks from entering the bottom of the temporary storage box body 12. The baffle 16 preferably adopts a magnetic baffle, and the magnetic baffle 16 enables iron materials to be adsorbed by the baffle 16, so that subsequent sorting burden is reduced, and therefore, the sorting efficiency is improved. Of course, the baffle 16 may be nonmagnetic, but a magnet is attached to the nonmagnetic baffle 16, and the ferrous material is attracted by the magnet.

S4, as shown in figure 1, feeding the material blocks in the temporary storage device B into a high-speed crusher C through a second conveying mechanism 17, and crushing to obtain a mixed material of resin powder particles and metal powder particles, wherein the particle size of the resin powder particles and the metal powder particles is 0.05-0.5 mm; the high-speed crusher C is a purchased product, and adopts a special high-speed rotary impact type crusher for waste plastic rubber products produced by environmental-friendly mechanical equipment limited company in Guangzhou city.

S5, as shown in figure 1, the mixed material is sent to an eddy current separator D for primary separation, the eddy current separator D generates a high-frequency alternating magnetic field to generate induced eddy currents in the non-magnetic conductor metal particles, and the non-magnetic conductor metal particles obtain a thrust to be separated from the mixed material; when scrap electronic waste containing non-magnetic conductor metals (e.g., aluminum, lead, copper, zinc, etc.) is passed through an alternating magnetic field generated by eddy current sorter D, induced eddy currents are generated in the particles of the non-magnetic conductor metals. Since the material flow has a relative movement speed with respect to the magnetic field, a thrust force is applied to the non-magnetic conductor metal powder particles that generate the eddy current, and the non-magnetic conductor metal powder particles move under the thrust force to be separated from the resin powder particles. After the eddy current separator D separates the mixed materials for the first time, the eddy current separator D also stirs and disperses the rest mixed materials.

As shown in fig. 4, the eddy current separator D includes: the device comprises a shell 18, a conveying mechanism, a separation magnetic roller 19, a first accommodating cavity 20 for receiving non-magnetic conductor metal and a first stirring and dispersing mechanism, wherein a feed port 18a is formed in the shell 18, the conveying mechanism conveys materials output from the feed port, and the conveying mechanism is arranged in the shell; the conveying mechanism comprises a motor 21, a speed reducer 22, a coupler 23 and a screw 24, the motor 21 is fixed on the shell 18, the output end of the motor 21 is connected with one end of the speed reducer 22, the other end of the speed reducer 22 is connected with one end of the coupler 23, and the other end of the coupler 23 is connected with the screw 24.

As shown in fig. 4, the separation magnetic roller 19 is installed in the housing 18 and located at one side of the conveying mechanism, the separation magnetic roller 19 generates a high-frequency alternating magnetic field to generate induced eddy currents in the non-magnetic conductor metal particles, and the non-magnetic conductor metal particles are separated from the mixture material by thrust; when the mixed material is conveyed by the conveying mechanism, the mixed material moves relative to the separation magnetic roller 19, the separation magnetic roller 19 generates a high-frequency alternating magnetic field to generate induced eddy currents in the metal powder particles of the non-magnetic conductor, the mixed material and the magnetic field have a relative movement speed, so that a thrust force is exerted on the metal powder particles generating the eddy currents, the metal powder particles of the non-magnetic conductor move under the action of the thrust force to be separated from the resin powder particles, and the separated metal powder particles of the non-magnetic conductor enter the first accommodating cavity 20.

As shown in fig. 4, since the screw 24 is used for conveying in the conveying mechanism, the extrusion action of the mixed material on the screw 24 will not be too loose, and in order to improve the subsequent sorting efficiency, the eddy current sorting machine D of the present invention is further provided with a first stirring and dispersing mechanism for dispersing the mixed material. First stirring dispersion mechanism is located the transport mechanism output, and this first stirring dispersion mechanism stirs the dispersion to the mixture of transport mechanism output.

As shown in fig. 4, the first stirring and dispersing mechanism includes a first mesh member 25 disposed on the housing 18, a first transmission shaft 26 mounted on the housing, a first disk member 27, and a first stirring and dispersing member 28, the first mesh member 25 receives the mixture output by the transmission mechanism, the first disk member 27 is connected to one end of the first transmission shaft 26, the first stirring and dispersing member 28 is disposed on the peripheral surface of the first disk member 27, and the first disk member 27 drives the first stirring and dispersing member 28 to rotate to stir and disperse the mixture falling into the first mesh member 25. The first net member 25 is preferably a U-shaped mesh.

As shown in fig. 4, the first agitation and dispersion member 28 also functions to sieve the material out of the first net member 25 when it is rotated, but this sieving is passive, i.e., the sieving efficiency is low. Thus, in the present invention, the first stirring and dispersing mechanism further includes a first eccentric transmission member 29 disposed on the housing 18, one end of the first mesh member 25 is hinged to the housing 18, the other end of the first mesh member 25 is provided with a notch 25a, one end of the first eccentric transmission member 29 is fitted into the notch, and the first eccentric transmission member 29 drives the first mesh member 25 to swing when rotating. When the first net-shaped member 25 swings, the powder particles in the first net-shaped member 25 are automatically sifted, which helps to increase the sifting speed of the first net-shaped member 25.

S6, as shown in fig. 1, the mixture outputted from the eddy current separator D is sent to the electrostatic separator E through the third conveying mechanism 30 to be separated for the second time, and the metal particles and the resin particles are separated by the electrostatic separator E, thereby obtaining resin particles for producing the wood-plastic particles. In the present invention, the electrostatic separation device E preferentially performs separation after shaking and dispersing the mixed material conveyed by the third conveying mechanism 30 into the electrostatic separation device E.

As shown in fig. 5, the electrostatic sorting apparatus E includes: the vibration feeding mechanism F, the material guiding plate 31, the corona electrode 32, the rotary separating roller 33, the static electrode 34, and the brush 35, and the following detailed description of the parts and the relationship therebetween:

as shown in fig. 5 to 7, the vibration feeding mechanism F applies a vibration force to the mixed material of the resin powder particles and the metal powder particles output from the eddy current separator D, and after the vibration feeding mechanism F vibrates the mixed material, the mixed material is dispersed, and the mixed material collides with the vibration feeding mechanism F, so that the internal activity of the powder particles is enhanced, and therefore, the two effects are beneficial to the subsequent charging of the powder particles under the action of the corona electrode 32.

As shown in fig. 5 to 7, the vibration feeding mechanism F includes a cylinder 36, a spring plate 37, an electromagnet, and a first supporting member 38, the spring plate 37 is located in the cylinder 36, a chamber 39 for accommodating the mixture is formed between the spring plate 37 and the upper portion of the cylinder 36, an output port 36a for outputting the mixture is provided on the sidewall of the cylinder 36, the peripheral surface of the spring plate 37 is connected to the inner wall surface of the cylinder 36, and the coil and the armature of the electromagnet are respectively mounted on the spring plate 37 and the first supporting member 38.

As shown in fig. 5 to 7, when the electromagnet is energized, a closing action is generated between the armature a and the coil b of the electromagnet, so that a downward acting force is generated on the spring plate 37 to elastically deform the spring plate 37, when the electromagnet is de-energized, the armature a is separated from the coil b, the spring plate 37 is restored to the original shape, and because the closing and opening actions of the electromagnet are very high in frequency, the spring plate 37 generates continuous vibration action. Thereby dispersing the particles and causing the particles to collide with the spring plate 37.

As shown in fig. 5 to 7, the vibratory feeding mechanism F further includes a friction member 37a, and the friction member 37a is mounted on the end surface of the spring plate 37, which carries the mixture. The vibration feeding mechanism F further comprises an elastic component 40 supporting the spring plate 37, one end of the elastic component is connected with the spring plate, and the spring plate 37 is supported by the elastic component 40, so that the spring plate 37 can bear more particles.

As shown in fig. 5 to 7, the material guiding plate 31 guides the mixed material output from the output port of the vibration feeding mechanism F; when the vibration feeding mechanism F vibrates, the upper surface of the spring plate 37 is inclined, so that the powder particles move to the direction of the output port 36a along with continuous vibration, so that the powder particles are output from the vibration feeding mechanism F to the material guide plate 31, the material guide plate 31 is provided with a material guide groove, and the powder material moves along the material guide groove to reach the rotary separating roller 33.

As shown in fig. 5, the corona electrode 32 negatively charges the resin powder particles and the metal powder particles, and the corona electrode 32 is located downstream of the output end of the material guide plate 31; the rotating separation roller 33 carries the mixture output from the material guide plate 31, the corona electrode 32 is positioned at one side of the rotating separation roller 33, and the rotating separation roller 33 enables the mixture with negative charge to be adsorbed on the separation roller 33; the static electrode generates electrostatic attraction to the metal particles to enable the metal particles to be separated from the rotary separating roller, the static electrode is positioned on one side of the rotary separating roller, and the static electrode is positioned at the downstream of the corona electrode; and a brush for brushing off the resin particles adsorbed on the rotary separating roller, wherein the brush is arranged at the other side of the rotary separating roller.

As shown in FIG. 5, the resin powder particles and metal powder particles with a particle size of 0.05 mm-0.5 mm are guided by the material guide plate 31 to move to the rotary separating roller 33, the resin powder particles and the metal powder particles are both charged with negative charges through the negative ion bombardment generated by the corona electrode 32, and the metal powder particles are rapidly de-charged and uncharged through the grounded rotary separating roller 33. The electrostatic attraction of the electrostatic electrodes 34 to the metal powder particles is released from the rotary separation drum 33 and falls into the metal collection area. The resin particles are repelled by the electrodes and remain on the surface of the rotating separation drum 33, and are brushed off by the brush 35 after rotating together with the rotating separation drum 33, and fall into the non-metal collection area.

Claims

1. A method for separating waste resin used for preparing plastic-wood particles is characterized by comprising the following steps:

s6, conveying the mixture output from the eddy current separator to an electrostatic separation device through a third conveying mechanism for secondary separation, and separating metal powder particles and resin powder particles through the electrostatic separation device to obtain resin powder particles for preparing plastic-wood particles;

the crusher comprises:

the first hopper is used for receiving the cooled material output by the precooling container;

the device comprises a box body, a first hopper and a second hopper, wherein one end of the box body is connected with the first hopper;

the first crushing mechanism is arranged on the box body and is used for pre-crushing the materials entering the box body in a shearing mode;

the second crushing mechanism is arranged on the box body and is positioned at the downstream of the first crushing mechanism, and the second crushing mechanism is used for crushing the pre-crushed materials into material blocks with the sizes of 1-3 mm;

the first crushing mechanism includes:

a first shaft, both ends of which are rotatably supported on the case;

a second shaft having both ends rotatably supported on the case;

one end of the first shaft and one end of the second shaft are provided with a first gear transmission mechanism for driving the first shaft and the second shaft to rotate, and the shaft bodies of the first shaft and the second shaft are respectively provided with a shearing part;

the shearing parts on the shaft bodies of the first shaft and the second shaft are arranged in a staggered manner, and the shaft bodies of the first shaft and the second shaft are also respectively provided with a lug boss which is positioned between two adjacent shearing parts;

the second crushing mechanism includes:

the two ends of the first cutter shaft are rotatably supported on the box body;

the two ends of the second cutter shaft are rotatably supported on the box body;

the cutter head is used for cutting the pre-crushed material into material blocks, and the cutter head is arranged on the first cutter shaft and the second cutter shaft;

one end of the first cutter shaft and one end of the second cutter shaft are provided with a second gear transmission mechanism for driving the first cutter shaft and the second cutter shaft to rotate;

the temporary storage device comprises:

the temporary storage box body is used for temporarily storing the material blocks;

the belt transmission mechanism is arranged in the temporary storage box body and is used for bearing the temporary storage material blocks and conveying the temporary storage material blocks to the output port of the temporary storage box body;

the material pushing mechanism is used for pushing the material blocks stacked on the belt transmission mechanism corresponding to the lower part of the input port of the temporary storage box body to enable the material blocks to be dispersed on the belt transmission mechanism, one part of the material pushing mechanism is positioned outside the temporary storage box body, and the other part of the material pushing mechanism is positioned in the temporary storage box body and above the belt transmission mechanism;

the temporary storage device also comprises a filling component for preventing the material block from falling between one end of the belt transmission mechanism and the inner wall surface of the temporary storage box body, and the filling component is matched between one end of the belt transmission mechanism and the inner wall surface of the temporary storage box body;

the eddy current separator includes: the device comprises a shell, a conveying mechanism, a separation magnetic roller, a first accommodating cavity for receiving non-magnetic conductor metal and a first stirring and dispersing mechanism, wherein the shell is provided with a feed port, the conveying mechanism conveys materials output from the feed port, and the conveying mechanism is arranged in the shell; the conveying mechanism comprises a motor, a speed reducer, a coupler and a screw rod, the motor is fixed on the shell, the output end of the motor is connected with one end of the speed reducer, the other end of the speed reducer is connected with one end of the coupler, and the other end of the coupler is connected with the screw rod;

the first stirring and dispersing mechanism comprises a first reticular component arranged on the shell, a first transmission shaft arranged on the shell, a first disc-shaped component and a first stirring and dispersing component, the first reticular component receives the mixed material output by the conveying mechanism, the first disc-shaped component is connected with one end of the first transmission shaft, the first stirring and dispersing component is arranged on the peripheral surface of the first disc-shaped component, the first disc-shaped component drives the first stirring and dispersing component to rotate so as to stir and disperse the mixed material falling into the first reticular component, and the first reticular component adopts a U-shaped screen mesh;

first stirring dispersion mechanism is still including setting up the first eccentric drive disk assembly on the casing, the one end and the casing of first netted part are articulated, and the other end of first netted part is equipped with the breach, and the cooperation of one end of first eccentric drive disk assembly is in this breach, and first netted part swing is ordered about to first eccentric drive disk assembly when rotatory.

2. The method for separating the waste resin for the preparation of the plastic-wood particles as claimed in claim 1, wherein the temperature in the pre-cooling container is controlled to be-80 to-110 ℃ in S1.

3. The method for separating waste resin for manufacturing plastic-wood particles as claimed in claim 1, wherein the temperature of the temporary storage device is controlled to be-40 to-60 ℃ at S4.

4. The method of separating waste resin for the preparation of plastic-wood particles as claimed in claim 1, wherein the eddy current separator performs a first separation of the mixed materials and then the remaining mixed materials are stirred and dispersed at S5.

5. The method of separating waste resin for the preparation of plastic-wood particles as claimed in claim 1, wherein the electrostatic separation device performs separation after the mixed material transferred to the electrostatic separation device by the third transfer mechanism is dispersed by vibration at S6.