WO2023061041A1

WO2023061041A1 - Solid waste crushing treatment system

Info

Publication number: WO2023061041A1
Application number: PCT/CN2022/113615
Authority: WO
Inventors: 王志明; 谢志成; 冯鸣凤
Original assignee: 天津格润爱德环保科技有限公司
Priority date: 2021-10-13
Filing date: 2022-08-19
Publication date: 2023-04-20
Also published as: CN113751173A; CN113751173B

Abstract

Provided is a solid waste crushing treatment system, comprising: a first crushing device (2), which is used for preliminarily crushing solid waste to generate first particles, wherein the particle size of at least 90% of the first particles is smaller than or equal to 150 mm; a second crushing device (6), which is used for crushing the first particles to generate second particles, wherein the particle size of the second particles is smaller than or equal to 100 mm; and a magnetic separation device (4), which is arranged between the first crushing device and the second crushing device and used for removing metal impurities in the first particles. The crushed solid waste particles generated by the system are stable in terms of combustion, and the production process achieves a high automation degree and is environmentally friendly.

Description

A solid waste crushing and processing system

technical field

The present disclosure relates to the field of garbage treatment, in particular to a solid garbage crushing and treatment system.

Background technique

At present, in the solid waste treatment system in the domestic market, general industrial solid waste is directly sent to incineration plants or landfills without crushing and other treatment links. However, when solid waste contains non-combustible substances, the incineration site cannot directly receive incineration. , Secondly, the unbroken industrial solid waste is very unstable and difficult to incinerate, while the incinerated solid waste produces more residues and is more difficult to deal with.

For the treatment of large-volume garbage, a simple crusher is generally used and a magnetic separation process is set up for the crushed garbage to select metal impurities, but the crushing effect is poor, the particle size cannot be effectively controlled, and the output volume is large, and Metallic impurities are poorly screened and cannot be effectively converted into alternative fuels. For landscaping solid waste, a simple crusher is also used to crush it. Since the volume of the discharged particles cannot be controlled, it cannot be directly used as an alternative fuel.

Contents of the invention

In order to solve at least one of the above technical problems, the present disclosure provides a solid waste crushing treatment system, including

a first crushing device, the first crushing device is used for primary crushing of solid waste to produce first particles, at least 90% of the first particles have a particle size less than or equal to 150mm;

a second crushing device, the second crushing device is used for crushing the first particles to generate second particles, the particle size of the second particles is less than or equal to 100mm;

A magnetic separation device, the magnetic separation device is arranged between the first crushing device and the second crushing device, and is used to remove metal impurities in the first particles.

According to at least one embodiment of the present disclosure, it also includes a conveyor belt, the conveyor belt includes a first conveyor belt, a second conveyor belt and a third conveyor belt, wherein,

The first conveyor belt is arranged between the solid waste heap and the first crushing device, and is used to transport the solid tendons to the storage bin of the first crushing device; and/or

The second conveyor belt is arranged between the first crushing device and the magnetic separation device, and is used to transport the first particles to the bottom of the magnetic separation device for impurity removal; and/or

The third conveying device is arranged between the magnetic separation device and the second crushing device, and is used for conveying the first particles after removal of impurities to the storage bin of the second crushing device.

According to at least one embodiment of the present disclosure, it also includes a collecting hopper, which is arranged behind the second crushing device and connected to the discharge port of the second crushing device through a pipeline;

The collecting hopper is a cyclone-type collecting hopper, which is connected with the air inlet of the negative pressure fan, and collects the second particles into the cyclone-type collecting hopper.

According to at least one embodiment of the present disclosure, it also includes a dust removal device, and the dust removal device

The dust removal device communicates with the storage bin of the first crushing device, the discharge port of the first crushing device, the magnetic separation device, the storage bin of the second crushing device, and the collecting hopper through pipelines. at least one connection of .

According to at least one embodiment of the present disclosure, the magnetic separation device is arranged in a confined space, and the dust removal device communicates with the confined space through a pipeline; and/or,

The dust removal device is connected to the air outlet of the negative pressure fan for collecting the dust in the collecting hopper; and/or,

The dust removal device is a pulse bag dust removal device.

According to at least one embodiment of the present disclosure, it also includes an anti-blocking device,

The anti-blocking device includes a control box, a first electronic weighing device arranged on the first conveyor belt, a second weighing device arranged on the second conveyor belt, and a second weighing device arranged on the first conveyor belt. The compacting device above the crushing cavity of the crushing device, the compacting device is used to apply pressure to the solid waste blocked in the crushing cavity to prevent material blockage, wherein,

The control box is respectively connected with the first electronic weighing device, the second electronic weighing device and the hydraulic device of the pressing device.

The pressing device includes a connecting rod and a pressing arm arranged on the outer wall of the crushing cavity. The pressing arm includes a straight rod, an arc-shaped arm and a pressing plate fixedly connected in sequence, wherein one end of the connecting rod and the hydraulic device One end of the connecting rod is jointly hinged to the outer wall of the crushing cavity, the other end of the connecting rod is hinged to one end of the straight rod, and the other end of the hydraulic device is hinged to the middle of the straight rod.

According to at least one embodiment of the present disclosure, the first crushing device includes one of a shearing four-shaft shredder and a shearing two-shaft shredder; and/or,

The second crushing device includes one of a hammer crusher and a cone crusher; and/or,

The magnetic separation device is a cross-type magnetic separator.

According to at least one embodiment of the present disclosure, a sieve plate is provided below the crushing chambers of the first crushing device and the second crushing device, and the sieve plate is used to control the particle size of the particles, which is larger than the pore size of the sieve plate of solid waste is broken again by knives;

The sieve plate is adapted to the crushing assembly, and the sieve plate is composed of at least one fan-shaped plate with mesh holes;

The fan-shaped plate is arranged on a supporting shell, and the supporting shell is detachably connected with the four-shaft shredder; and

A supporting body is arranged under the supporting shell, and a plurality of rollers are arranged at the bottom of the supporting body.

According to at least one embodiment of the present disclosure, the porosity of the sieve plate is 80-90%; and/or,

The meshes on each fan-shaped plate are arranged in groups, and the distance between two adjacent groups of meshes is 150-200mm; and/or,

The shape of the mesh is hexagonal, and in each group of meshes, the meshes in two adjacent rows or columns are alternately arranged; and/or,

The aperture of the mesh is 60-150mm.

According to at least one embodiment of the present disclosure, on the sieve plate of the four-shaft shredder, guide ribs are further provided between two adjacent groups of mesh holes, wherein the first guide ribs are arranged at the first interval, and the first guide ribs The ribs extend along the direction of the first rib to the second rib and gradually move away from the mesh group at the end; and/or,

The second guide rib is disposed in the middle of the second spacer and along the circumference of the sector plate; and/or,

The 3rd guiding rib is arranged on the 3rd spacing part, and the 3rd guiding rib extends along the direction of the 3rd rib to the second rib and gradually away from the mesh group at the end; And/or,

The fourth guiding rib is arranged in the middle of the fourth spacer and along the circumferential direction of the sector plate where it is located.

Compared with the prior art, the solid waste crushing and processing system provided by the present disclosure has a smaller output volume, a higher selection rate of metal impurities, stronger compatibility, and can be directly used as an alternative fuel. The first crushing device of the present disclosure adopts a shearing four-shaft shredder, which makes it highly compatible, and can be applied to bulky garbage, landscaping garbage and general industrial garbage. The volume of the output material is controlled according to the mesh aperture of the sieve plate. For the garbage particles smaller than the mesh aperture, it is transported to the next process through the conveying device, and for the garbage that cannot pass through the mesh, it is sent by the shaft of the shearing four-shaft shredder. The upper cutter grabs back to the crushing cavity for secondary crushing until the garbage particles can pass through the mesh on the sieve plate smoothly.

The shearing four-shaft shredder is used to set the screen mode, so that the screening process of garbage particles is saved, the structure is more compact, and the footprint of the equipment is reduced, and the particle size can be changed by changing different apertures. The sieve plate is controlled to achieve smaller particle size. By generating smaller particle size particles, the screening rate of metal particles mixed in garbage is also higher.

For the sieve plate that is squeezed by the garbage caused by the rotation of the crushing roller, the sieve plate is equipped with multiple ribs, which improve the overall strength of the sieve plate and greatly improve the service life. At the same time, guide ribs are also set. In addition to the overall strength, the garbage particles that have not passed through the sieve plate are guided to the rollers on both sides through the guiding function, and the garbage particles at both ends are guided to the middle of the rollers, which reduces the load on the two middle rollers and disperses Crushing is carried out in the rollers located on both sides, and at the same time, the garbage particles at both ends are guided to the center part of the roller, so that the garbage particle crushing efficiency is higher.

The solid waste crushing treatment system provided by the present disclosure is also equipped with an anti-blockage device in the first crushing device, and an electronic scale is installed before and after the crusher to detect the weight difference between the input material and the output material to determine whether the crushing cavity is blocked. When the material is blocked, the pressure plate set above the crushing chamber presses the solid waste to the crushing roller through the hydraulic control device, increasing the pressing force between the solid waste and the crushing roller so that the waste passes through the crushing roller and crushed.

The solid waste crushing and processing system provided by the present disclosure also installs a dust suction port at a position where dust is likely to be generated, and enters the dust removal device through a dust suction pipe for dust removal, thereby keeping the environment clean, especially at the magnetic separation device, the entire magnetic separation device is closed In the sealed space, the dust removal device is connected through the dust suction pipe, which greatly reduces the pollution of dust to the environment. For the second crushed particles, the final garbage particles are collected in the form of a collection hopper, and the cyclone type collection hopper is used. The material runs in a fully enclosed state, and the dust is collected on the upper part of the collecting hopper, so that the dust and garbage particles are further separated. The dust is collected by the dust removal device, and the garbage particles are collected centrally, which is convenient for packaging or further compression into molded products.

Description of drawings

The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the disclosure, are included to provide a further understanding of the disclosure, and are incorporated in and constitute this specification. part of the manual.

Fig. 1 is a schematic top view of a solid waste crushing and treatment system according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of plane A-A of Fig. 1 .

Fig. 3 is a schematic diagram of the B-B plane of Fig. 1 .

Fig. 4 is a schematic diagram of plane C-C of Fig. 1 .

5 is a schematic perspective view of a frit according to an embodiment of the present disclosure.

6 is a schematic top view of a frit according to an embodiment of the disclosure.

Detailed ways

The present disclosure will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The present disclosure will be described in detail below with reference to the drawings and embodiments.

According to an embodiment of the present disclosure, as shown in FIGS. 1-2 , a solid waste crushing treatment system is provided, including a first crushing device 2, which is used for primary crushing of solid waste to produce first particles, at least The particle size of 90% of the first particles is less than or equal to 150mm; the second crushing device 6, the second crushing device is used for crushing the first particles to produce second particles, the particle size of the second particles is less than or equal to 100mm; A magnetic separation device 4, which is arranged between the first crushing device and the second crushing device, is used to remove metal impurities in the first particles.

The first crushing device 2, as the first crushing device for solid waste, crushes general solid waste, and at least 90% of the particle diameter of the first discharged particles should be less than or equal to 150mm. It may provide crushing redundancy for the next crushing process. If there are too many particles larger than 150mm in size, material blockage will occur in the second crushing process, or the crushing efficiency of the second process will decrease due to excessive particle size If it cannot be processed in time, there will also be material accumulation. For some incineration plants that do not have high requirements for combustion value, at least 90% of the particle size should be less than or equal to 150mm. The first particle can meet the packaging needs, and there is no need for subsequent second crushing , saving costs. For the particle size of the second particle after the second crushing is less than or equal to 100mm, it is a further crushing of the first particle, and the particle size of the second particle is less than or equal to 100mm. Compared with the garbage with too large or too small particle size, it is also more fully burned. For the setting of the second crushing device, in addition to considering the needs of particle size, because the strength and toughness of the garbage materials crushed in the first crushing device are different, some garbage particles will be squeezed, bonded and other reasons to cause length It is longer, but it can also leak from the mesh of the sieve plate. This probability is difficult to control. For some solid wastes that are difficult to control, the first particle with a particle size greater than 150mm may account for more than 10%, so set the second crushing Another purpose of the device is to ensure that the particle size of the final waste particles meets the requirements for sufficient and stable combustion. The magnetic separation device 3 is arranged between the first crushing device 2 and the second crushing device 6. The first crushing device 2 can adopt a 4-axis shearing crusher, which can crush metal impurities and garbage. plate, its discharge particle size is small, and the magnetic separation device 3 can remove the metallic impurities in the discharge particles crushed by the first crushing device 2 through magnetic separation, and the particle size of the first particles crushed by the first crushing device 2 is relatively small. Small, when the particle size of at least 90% of the first particles is less than or equal to 150mm, the magnetic separation device has a higher selection rate of metallic impurities, and the second crushing device 6 has less wear and tear on the crushing tool and prolongs its life. The magnetic separation device selects metal impurities so that the waste slag generated by combustion is further reduced, reducing the amount of waste slag to be processed.

In some embodiments, as shown in Figure 2, the solid waste crushing and processing system, the materials in each link are conveyed through the conveyor belt, and the degree of automation is higher, including the first conveyor belt 1, the second conveyor belt 3 and the third conveyor belt. Belt 5, the first conveyor belt 1 is set between the solid waste heap and the first crushing device 2, and is used to transport the solid waste to the storage bin of the first crushing device 2; the second conveyor belt 3 is set on the first crushing device Between the device 2 and the magnetic separation device 4, it is used to transport the first particles to the bottom of the magnetic separation device 4 for impurity removal; the third conveying device 5 is arranged between the magnetic separation device 4 and the second crushing device 6, for The removed first particles are transported to the storage bin of the second crushing device 6 .

In some embodiments, the conveyor belt can use a chain plate conveyor belt or a rubber conveyor belt to transfer the material from the previous process to the next process, and the first conveyor belt 1 transports the solid waste to the storage bin of the first crushing device 2 Among them, due to the need to remove metal impurities as much as possible for the first particles, the magnetic separation device 4 is arranged between the two conveyor belts, for example, one end of the second conveyor belt 3 is arranged below the discharge port of the first crushing device 2 , and gradually incline upward to convey the material to the bottom of the magnetic separation device 4 and approach the magnetic separation device 4, while the third conveyor belt 5 gradually inclines upward from the bottom below the magnetic separation device 4 to the storage bin of the second crushing device 6. The magnetic separation device 4 can be a cross-type magnetic separation device, which has strong magnetism. When the first particles fall from the end of the second conveyor belt 3 to the third conveyor belt 5, the metal particles mixed in the second particles are scattered. The area is large, so the magnetic separation device 4 has a high impurity removal effect, and even the metal impurities buried inside will be exposed during the falling process, so that they are selected by the magnetic separation device 4 to remove metallic impurities.

In some embodiments, the collecting hopper 7 is arranged after the second crushing device 6 and is connected with the discharge port of the second crushing device 6 through a pipeline; connected to collect the second pellets into the cyclone collection hopper.

As shown in Figure 2-4, in the solid waste crushing treatment system, the second particles crushed by the second crushing device 6 are collected through the collecting hopper 7, because the second particle size is already very small, and a large number of fine particles are mixed If the second particles are directly collected, the fine particles of garbage will float and directly cause environmental pollution, and the collection hopper 7 is set and connected to the collection hopper through the air inlet of the negative pressure fan 8, so that the second particles of garbage can be directly discharged from the discharge through negative pressure. The cyclone-type collecting hopper not only settles the second particles with heavier particles to the bottom of the collecting hopper 7 for collection, but also sends the dust into the external dust removal device 9 through the pipe at the top of the collecting hopper 7 The dust can be prevented from being lost to the external environment to the greatest extent. At the same time, the garbage particles collected by the collecting hopper 7 can prepare for the subsequent packaging process. The garbage particles can be directly sent into the packaging device, and continuous automatic packaging can be performed on the basis of not polluting the environment. , or enter the pressurized packaging operation.

As shown in Figure 1-2, the dust removal device 9 is connected with the storage bin of the first crushing device 2, the discharge port of the first crushing device 2, the magnetic separation device 4, the storage bin of the second crushing device 6, and the collector through pipelines. At least one of the hoppers 7 communicates.

In some embodiments, the dust removal device 9 collects the dust at the suction port of the pipeline through the pipeline under the action of the centrifugal fan 10 into the dust removal device 9, and is respectively installed in the storage bin and the discharge port of the first crushing device 2. The dust collection device is connected to the dust suction pipeline, and the dust collection device is also arranged at the magnetic separation device, and the dust collection device is arranged at the collecting hopper 7. Optionally, the magnetic separation device 4 is arranged in the sealed space, and the dust removal device 9 passes through the pipeline. It communicates with the confined space to completely eliminate the dust dissipation at the magnetic separation device 4, and optionally, the dust removal device 9 is a pulse bag dust removal device.

In some embodiments, the solid waste crushing system also includes an anti-blocking material device, wherein, as shown in Figure 2, it includes a control box (not shown in the figure), a first conveyor belt set on the first An electronic weighing device (not shown in the figure), a second weighing device (not shown in the figure) arranged on the second conveyor belt 3, and a pressing device arranged above the crushing chamber of the first crushing device 2 21. The compacting device 21 is used to apply pressure to the solid waste blocked in the crushing cavity to prevent material blockage, wherein the control box is respectively connected with the first electronic weighing device, the second electronic weighing device and the hydraulic device of the compacting device .

The pressing device 21 includes a connecting rod and a pressing arm arranged on the outer wall of the crushing chamber, and the pressing arm includes a straight rod, an arc-shaped arm and a pressing plate fixedly connected in turn, wherein one end of the connecting rod and one end of the hydraulic device are jointly hinged in the crushing chamber On the outer side wall, the other end of the connecting rod is hinged to one end of the straight rod, and the other end of the hydraulic device is hinged to the middle part of the straight rod.

In some embodiments, when the control box detects the difference between the first electronic weighing device and the second electronic weighing device, that is, the first crushing device 2 has a large difference in the input and output weights, the control box judges that it is crushing If there is a blockage in the cavity, the control box will issue an instruction to shorten the hydraulic device of the pressing device, and the hydraulic device will drive the pressure plate in the pressing arm to press against the direction of the crushing chamber, increasing the pressing force of the blocking material and the roller knife, so that the blocking material Enter the roller knife for crushing. When the blockage is removed, the control box will issue an instruction to keep the pressure plate away from the crushing chamber.

In some embodiments, in order to adapt to different types of solid waste, the first crushing device 2 is preferably a shearing four-shaft shredder, and a shearing two-shaft shredder can also be selected according to needs. The shaft shredder can crush various types of large-volume solid waste, and has a wider range of applications. The second crushing device 6 can be a hammer crusher or a cone crusher, the crushing particle size is smaller, and the magnetic separation device 4 can be a cross-type magnetic separator.

In some embodiments, as shown in Figures 5-6, a sieve plate is provided below the crushing chambers of the first crushing device 2 and the second crushing device 6, and the sieve plate is used to control the particle size of the particles, which is larger than the sieve plate The solid waste with the hole size is crushed again by the cutter; the sieve plate is adapted to the crushing assembly, and the sieve plate is composed of at least one fan-shaped plate with mesh holes; the fan-shaped plate is set on the supporting shell, and the supporting shell is shredded The machine is detachably connected; and a supporting body is arranged under the supporting shell, and a plurality of rollers are arranged at the bottom of the supporting body. The supporting body is used to support the sieve plate, and a plurality of rollers are arranged at the bottom of the supporting body, which is used for more convenient and quick replacement of the sieve plate. The sieve plate is detachably connected to the crushing device through the pin holes and connecting lugs of the four shafts of the shell. When crushing particles with different particle sizes are needed, just remove the sieve plate and replace it with the corresponding sieve plate. .

As shown in Figure 5-6, for example, the sieve plate of a shearing four-shaft shredder has an opening rate of 80-90%; The distance between them is 150-200mm; the shape of the meshes is hexagonal, and in each group of meshes, the meshes in two adjacent rows or columns are arranged alternately; the diameter of the meshes is 60-100mm. The setting of the opening rate not only requires that the required particle size can be achieved, at least 90% of the first particles have a particle size less than or equal to 150mm, but also consider the strength and life of the sieve plate. When the opening rate is small, it cannot To meet the particle size required by the crushing process, when the opening ratio is large, the strength of the sieve plate is difficult to guarantee, and the service life is shortened, resulting in an increase in cost. Combined with the strength of the sieve plate and the process requirements, the opening rate of the sieve plate is set to 80- 90%. In addition, in order to obtain such a large opening ratio, the shape of the mesh is set to be hexagonal. Compared with the shape of the mesh being circular, the opening ratio can be made larger. Further, as shown in Figure 5, in order to increase the strength of the sieve plate, the openings are not evenly distributed, but in the form of groups, and at the same time in the same group of meshes, two adjacent rows or two columns The meshes are interlaced with each other to further increase the opening ratio. At the same time, some guide ribs are reserved at intervals to strengthen the structure of the entire sieve plate. According to needs, the aperture of the sieve plate is 60-150mm. The spacing D between the holes is 150-200mm.

As shown in Figure 5, guide ribs are also provided between adjacent two groups of meshes, wherein the first guide ribs 211 are arranged on the first spacer 221, and the first guide ribs 211 move toward the second rib along the first rib 201. 202 and gradually away from the mesh group at the end; the second guide rib 212 is arranged in the middle of the second spacer 222 and arranged along the circumference of the sector plate where it is located; the third guide rib 213 is arranged at the third spacer 223, The third guide rib 213 extends along the third rib 203 toward the second rib 202 and gradually moves away from the mesh group at the end; the fourth guide rib 214 is arranged in the middle of the fourth spacer 224 and along the circumferential direction of the fan-shaped plate set up. The guide ribs not only strengthen the overall strength of the sieve plate, but also disperse the garbage particles of the sieve plate to the rollers on both sides for crushing, and the garbage particles at both ends of the sieve plate are guided to the center of the roller shaft, making the garbage particle crushing more efficient , to reduce the crushing load of the two intermediate rollers and increase their service life.

The solid waste crushing and processing system provided by the present disclosure is equipped with an anti-blocking device through a specially designed sieve plate, in addition to the particle size being completely in line with the combustion stability effect, which has a higher degree of automation, and the dust removal device will easily produce dust. All are sealed, so that the entire production process conforms to the concept of environmental protection.

In the description of this specification, descriptions referring to the terms "one embodiment/mode", "some embodiments/modes", "examples", "specific examples", or "some examples" mean that the embodiments/modes are combined The specific features, structures, materials or characteristics described in or examples are included in at least one embodiment/mode or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment/mode or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments/modes or examples in an appropriate manner. In addition, those skilled in the art may combine and combine different embodiments/modes or examples and features of different embodiments/modes or examples described in this specification without conflicting with each other.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

It should be understood by those skilled in the art that the above-mentioned embodiments are only for clearly illustrating the present disclosure, rather than limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

A solid waste crushing and processing system, characterized in that it includes

a first crushing device, the first crushing device is used for primary crushing of solid waste to produce first particles, at least 90% of the first particles have a particle size less than or equal to 150mm;

a second crushing device, the second crushing device is used for crushing the first particles to generate second particles, the particle size of the second particles is less than or equal to 100 mm;

A magnetic separation device, the magnetic separation device is arranged between the first crushing device and the second crushing device, and is used to remove metal impurities in the first particles.
The solid waste crushing and processing system according to claim 1, further comprising a conveyor belt, the conveyor belt comprising a first conveyor belt, a second conveyor belt and a third conveyor belt, wherein,

The first conveyor belt is arranged between the solid waste heap and the first crushing device, and is used to transport the solid waste to the storage bin of the first crushing device; and/or

The second conveyor belt is arranged between the first crushing device and the magnetic separation device, and is used to transport the first particles to the bottom of the magnetic separation device for impurity removal; and/or

The third conveying device is arranged between the magnetic separation device and the second crushing device, and is used for conveying the first particles after removal of impurities to the storage bin of the second crushing device.
The solid waste crushing and processing system according to claim 1, further comprising a collecting hopper, which is arranged behind the second crushing device and connected to the discharge port of the second crushing device through a pipeline;

The collecting hopper is a cyclone-type collecting hopper, which is connected with the air inlet of the negative pressure fan, and collects the second particles into the cyclone-type collecting hopper.
The solid waste crushing and processing system according to claim 3, further comprising a dust removal device, and the dust removal device

The dust removal device communicates with the storage bin of the first crushing device, the discharge port of the first crushing device, the magnetic separation device, the storage bin of the second crushing device, and the collecting hopper through pipelines. at least one connection of .
The solid waste crushing and processing system according to claim 4, wherein the magnetic separation device is arranged in a confined space, and the dust removal device communicates with the confined space through a pipeline; and/or,

The dust removal device is connected to the air outlet of the negative pressure fan for collecting the dust in the collecting hopper; and/or,

The dust removal device is a pulse bag dust removal device.
The solid waste crushing system according to claim 2, further comprising an anti-blocking device,

The anti-blocking device includes a control box, a first electronic weighing device arranged on the first conveyor belt, a second weighing device arranged on the second conveyor belt, and a second weighing device arranged on the first conveyor belt. The compacting device above the crushing cavity of the crushing device, the compacting device is used to apply pressure to the solid waste blocked in the crushing cavity to prevent material blockage, wherein,

The control box is respectively connected with the first electronic weighing device, the second electronic weighing device and the hydraulic device of the pressing device.

The pressing device includes a connecting rod and a pressing arm arranged on the outer wall of the crushing cavity. The pressing arm includes a straight rod, an arc-shaped arm and a pressing plate fixedly connected in sequence, wherein one end of the connecting rod and the hydraulic device One end of the connecting rod is jointly hinged to the outer wall of the crushing cavity, the other end of the connecting rod is hinged to one end of the straight rod, and the other end of the hydraulic device is hinged to the middle of the straight rod.
The solid waste crushing and processing system according to claim 1, wherein the first crushing device includes one of a shearing type four-shaft shredder and a shearing type two-shaft shredder; and/or,

The second crushing device includes one of a hammer crusher and a cone crusher; and/or,

The magnetic separation device is a cross-type magnetic separator.
The solid waste crushing and processing system according to claim 7, wherein a sieve plate is arranged below the crushing chambers of the first crushing device and the second crushing device, and the sieve plate is used to control the particles Particle size, solid waste larger than the hole size of the sieve plate is crushed again by the cutter;

The sieve plate is adapted to the crushing assembly, and the sieve plate is composed of at least one fan-shaped plate with mesh holes;

The fan-shaped plate is arranged on a supporting shell, and the supporting shell is detachably connected with the four-shaft shredder; and

A supporting body is arranged under the supporting shell, and a plurality of rollers are arranged at the bottom of the supporting body.
The solid waste crushing and processing system according to claim 8, wherein the porosity of the sieve plate is 80-90%; and/or,

The meshes on each fan-shaped plate are arranged in groups, and the distance between two adjacent groups of meshes is 150-200mm; and/or,

The shape of the mesh is hexagonal, and in each group of meshes, the meshes in two adjacent rows or columns are alternately arranged; and/or,

The aperture of the mesh is 60-100mm.
The solid waste crushing and processing system according to claim 8, characterized in that, on the sieve plate of the four-shaft shredder, guide ribs are also arranged between two adjacent groups of mesh holes, wherein the first guide rib is arranged on the The first spacer, the first guide rib extends along the direction of the first rib to the second rib and is gradually away from the mesh group at the end; and/or,

The second guide rib is disposed in the middle of the second spacer and along the circumference of the sector plate; and/or,

The third guiding rib is arranged at the third spacer, and the third guiding rib extends along the direction of the third rib to the second rib and gradually moves away from the mesh group at the end; and/or,

The fourth guiding rib is arranged in the middle of the fourth spacer and along the circumferential direction of the sector plate where it is located.