Urban dangerous solid waste crushing device and fused salt heating type anaerobic cracking carbonization system

Abstract

The invention discloses an urban dangerous solid waste crushing device and a fused salt heating type anaerobic cracking carbonization system, and belongs to the technical field of urban solid waste treatment.The urban dangerous solid waste crushing device comprises a shell, a driving mechanism, two crushing rollers and a plurality of fine crushing disc assemblies, the crushing rollers are installed on the first shell, and the fine crushing disc assemblies are installed on the second shell; each fine crushing disc assembly comprises a first fine crushing disc and a second fine crushing disc, the driving mechanism is used for driving the first fine crushing disc and the second fine crushing disc to rotate in the opposite directions, and the opposite faces of the first fine crushing disc and the second fine crushing disc sequentially comprise an extrusion face and a guide face outwards in the radial direction. The extrusion surface is further provided with a plurality of groups of shearing convex teeth which are circumferentially and uniformly distributed, one group of shearing convex teeth comprises a plurality of shearing convex teeth which are distributed at intervals along an arc line, the protruding direction of the arc line path of the shearing convex teeth deviates from the rotating direction of the extrusion surface, and the shearing convex teeth of the first fine crushing disc and the second fine crushing disc are arranged in a staggered manner along the radial direction. The crushing and refining effects can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of urban solid waste treatment, and relates to an urban hazardous solid waste crushing device and a molten salt heated anaerobic cracking carbonization system. Background Art

[0002] Urban hazardous solid waste (Hazardous solid waste) usually refers to solid waste generated in urban production and life, which has one or more hazardous characteristics such as corrosiveness, toxicity, flammability, reactivity or infection. These wastes may come from industrial production, medical activities, laboratories, households, etc., including but not limited to waste acid, waste alkali, waste oil, waste batteries, waste fluorescent tubes, waste paint barrels, medical waste, electronic waste, etc.

[0003] Existing methods for treating hazardous solid waste include chemical treatment, thermal treatment, stabilization treatment and safe landfill. Thermal treatment includes incineration and anaerobic cracking and carbonization. Before the above treatments, the solid waste is often required to be crushed and pre-treated to increase the surface area and reduce the volume of the solid waste, thereby improving the efficiency and effectiveness of subsequent treatment.

[0004] The existing crushing method mainly uses crushing rollers for crushing. A single-stage crushing roller has low energy consumption, but poor particle size controllability. Further, multi-stage crushing rollers, such as three-stage and four-stage, are used to control the crushing particle size, but the energy consumption of multi-stage crushing rollers is high. Summary of the invention

[0005] In view of the problem that it is difficult to balance the existing crushing particle size and energy consumption, a municipal hazardous solid waste crushing device and a molten salt heated anaerobic cracking carbonization system are provided.

[0006] The present application provides a device for crushing urban hazardous solid waste, which is specifically implemented by the following technical solutions: A device for crushing hazardous solid waste in a city, comprising a shell, a driving mechanism, two crushing rollers and a plurality of fine crushing disc assemblies, wherein the shell comprises a square first shell and a cylindrical second shell from top to bottom, the axis of the second shell is arranged horizontally, the upper part of the first shell has a feed port, the lower part of the first shell is connected to the second shell through a socket, the lower part of the second shell has a discharge port, the crushing roller is mounted on the first shell, the fine crushing disc assembly is mounted on the second shell, each fine crushing disc assembly is arranged along the axial direction of the second shell, the fine crushing disc assembly comprises a first fine crushing disc and a second fine crushing disc, and the first fine crushing disc and the second fine crushing disc are both coaxial with the second shell The size of the receiving interface is less than or equal to the radius of the first fine crushing disk and the second fine crushing disk, the driving mechanism is used to drive the first fine crushing disk and the second fine crushing disk to rotate in opposite directions, the opposite surfaces of the first fine crushing disk and the second fine crushing disk successively include an extrusion surface and a guide surface radially outward, the generatrix inclination angle of the extrusion surface is greater than the generatrix inclination angle of the guide surface, the extrusion surface is evenly distributed with micro-protrusions, and the extrusion surface is also provided with a plurality of groups of circumferentially evenly distributed shearing convex teeth, a group of shearing convex teeth includes a plurality of shearing convex teeth arranged at intervals along an arc line, and the protruding direction of the arc path of the shearing convex teeth deviates from the rotation direction of the extrusion surface, and the shearing convex teeth of the first fine crushing disk and the second fine crushing disk are radially staggered.

[0007] Through the above technical scheme, solid waste is put into the first shell through the feed inlet, the crushing roller roughly crushes the solid waste to form crushed materials, and the crushed materials enter the second shell through the receiving interface, and the crushed materials slide down to between the extrusion surface of the first fine crushing disk and the extrusion surface of the second fine crushing disk under the guidance of the guide surface, and the crushed materials are further crushed when the shearing convex teeth rotating in opposite directions intersect to produce fine crushed materials, that is, the crushed materials are sheared and crushed at the intersection of the shearing convex teeth of the first fine crushing disk and the shearing convex teeth of the second fine crushing disk (the intersection point can be understood as the intersection point between two arcs rotating in opposite directions with the same center of a circle), and because the shearing convex teeth are arranged in an arc, and the convex direction of the arc path deviates from the rotation direction of the extrusion surface, therefore, with the rotation, the shearing convex teeth of the first fine crushing disk and the shearing convex teeth of the second fine crushing disk are The intersection will move from the radial outside to the inside, that is, the area of ​​the area surrounded by the shearing protrusions of the first crushing disk and the shearing protrusions of the second crushing disk will gradually decrease, so as to continuously apply pressure to the crushed materials in the enclosed area, so as to force the crushed materials to move along the moving direction of the intersection, that is, to force the crushed materials to move radially inward. Therefore, in the process of the movement of the crushed materials, the crushed materials will continuously collide with the micro-protrusions on the extrusion surface, and the micro-protrusions on the extrusion surface rotating in opposite directions will grind the crushed materials to further refine the particle size of the crushed materials. Moreover, since the distance between adjacent extrusion surfaces gradually decreases radially inward, that is, the distance between the micro-protrusions on adjacent extrusion surfaces gradually decreases, therefore, as the crushed materials move radially inward, the micro-protrusions will gradually grind the crushed materials, so that the particle size uniformity and particle size of the crushed materials are extremely well controlled.

[0008] In summary, by providing a fine crushing disk assembly, arc-arranged shearing protrusions, an extrusion surface and micro-protrusions, the coarse crushed material can be further crushed under the action of the shearing protrusions to produce fine crushed material, and, with the rotation, the intersection of the shearing protrusions of the first fine crushing disk and the shearing protrusions of the second fine crushing disk will move from the radial outside to the inside, and the area of ​​the area enclosed by the shearing protrusions of the first fine crushing disk and the shearing protrusions of the second fine crushing disk will gradually decrease, so as to continuously apply pressure to the fine crushed material in the enclosed area, so as to force the fine crushed material to move radially inward, and the micro-protrusions of the extrusion surface rotating in opposite directions will grind the fine crushed material, and as the fine crushed material moves radially inward, the micro-protrusions will gradually grind the fine crushed material, so that the particle size uniformity and particle size of the fine crushed material are extremely well controlled; secondly, compared with the existing multi-stage crushing, the present application utilizes two crushing structures, i.e., the particle size uniformity and particle size are extremely well controlled, and the energy consumption is relatively low.

[0009] Optionally, the size of each shearing tooth in the same group of shearing teeth gradually increases along the direction away from the axial center of the extrusion surface, and the gap between adjacent shearing teeth in the same group of shearing teeth gradually increases along the direction away from the axial center of the extrusion surface.

[0010] Optionally, a semi-arc auxiliary strip is fixed to the inner wall of the second shell, the auxiliary strip is located between the guide surface of the first fine crushing disk and the guide surface of the second fine crushing disk, the cross-section of the auxiliary strip is triangular, the outer wall of the auxiliary strip is in contact with the guide surface, the upper end of the auxiliary strip is located at the receiving interface, and the lower end of the auxiliary strip is higher than the axis of the fine crushing disk assembly.

[0011] Through the above technical solution, by providing the auxiliary strip, the coarse crushing material can be guided more accurately to enter directly above the fine crushing disc assembly, so as to reduce the coarse crushing material from directly falling out from the outer guide surface.

[0012] Optionally, the driving mechanism includes a first driving motor, a second driving motor, a transmission shaft, a worm and an annular worm wheel, the transmission shaft passes through the axes of the first fine crushing disk and the second fine crushing disk in sequence, the transmission shaft is rotatably matched with the second shell, the first fine crushing disk is locked with the transmission shaft, the first driving motor is used to drive the transmission shaft to rotate, the second fine crushing disk is relatively rotatably matched with the transmission shaft, the worm wheel is fixed at the outer diameter of the second fine crushing disk, the worm is rotatably matched with the second shell, the worm is located directly below the second fine crushing disk, the worm is meshed with the worm wheel, and the second driving motor is used to drive the worm to rotate.

[0013] Through the above technical solution, the first driving motor is used to drive the transmission shaft to rotate, thereby driving the first crushing disk of each crushing disk assembly to rotate together, and the second driving motor is used to drive the second crushing disk to rotate through the worm gear, thereby realizing the first crushing disk and the second crushing disk to rotate in opposite directions.

[0014] Optionally, the transmission shaft is a tubular structure, a key block is fixed at the axis center of the first fine crushing disk, a key slot extending in the axial direction is opened through the transmission shaft, the key slot is blocked at the inner diameter of the first fine crushing disk, and the key block is slidingly matched with the key slot; a hydraulic cylinder is fixed to the second shell, the telescopic direction of the hydraulic cylinder is the axial direction of the transmission shaft, a movable shaft is fixed to the telescopic end of the hydraulic cylinder, the movable shaft is axially slidingly matched with the inner cavity of the transmission shaft, and two clips are fixed to the movable shaft, and the two clips are respectively abutted against the two ends of the key block through planar thrust bearings.

[0015] With the above technical solution, the key block cooperates with the key slot to achieve torque transmission from the transmission shaft to the first crushing disk, while allowing the first crushing disk to slide axially for a short distance relative to the transmission shaft.

[0016] When the crushing process is intermittent feeding, the hydraulic cylinder drives the movable shaft to move axially, and the clamping piece of the movable shaft drives the key block and the first fine crushing disk to move axially relative to the transmission shaft, so that the axial distance between the first fine crushing disk and the second fine crushing disk is increased, that is, there is enough space to accommodate more coarse crushed materials at one time. After the coarse crushed materials intermittently enter the second shell from the first shell, the coarse crushed materials enter between the extrusion surfaces of the first fine crushing disk and the second fine crushing disk. At the same time, the hydraulic cylinder drives the movable shaft to move axially again, so that the axial distance between the first fine crushing disk and the second fine crushing disk is reduced, and the extrusion surfaces of the first fine crushing disk and the second fine crushing disk embrace the coarse crushed materials and apply axial pressure to the coarse crushed materials. Then the first fine crushing disk and the second fine crushing disk rotate in opposite directions to shear and grind the coarse crushed materials. Under a certain axial pressure, the grinding effect on the fine crushed materials is better, and the particle size of the fine crushed materials is more uniform and refined.

[0017] Optionally, the shearing convex tooth is set to be cylindrical, the axis of the shearing convex tooth is parallel to the axis of the fine crushing disk assembly, the shearing convex tooth is rotatably matched with the extrusion surface, the first fine crushing disk and the second fine crushing disk both have an installation cavity, the end of the shearing convex tooth located in the installation cavity is fixed with a first gear, the inner wall of the installation cavity is provided with a second gear, and the first gears of two adjacent shearing convex teeth are respectively meshed with the second gear; the first fine crushing disk is fixed with a first rotating sleeve, the first rotating sleeve extends into the installation cavity of the second fine crushing disk, the end of the first rotating sleeve is fixed with a third gear, the third gear is meshed with the first gear in the installation cavity of the second fine crushing disk, and the second fine crushing disk is fixed with a third gear. Two rotating sleeves, the second rotating sleeve is sleeved on the outside of the first rotating sleeve, the second rotating sleeve extends into the installation cavity of the first fine crushing disk, and a fourth gear is fixed to the end of the second rotating sleeve, and the fourth gear is meshed with the first gear in the installation cavity of the first fine crushing disk; the direction of the shearing protrusion of the first fine crushing disk and the direction of the first fine crushing disk are both clockwise, and the direction of the shearing protrusion of the second fine crushing disk and the direction of the second fine crushing disk are both counterclockwise; a plurality of shearing protrusions are fixed on the outer peripheral surface of the shearing protrusion, and the shearing protrusion of the first fine crushing disk and the shearing protrusion of the second fine crushing disk are axially staggered along the shearing protrusion; a plurality of circumferentially spaced rolling protrusions are fixed on the end surface of the shearing protrusion.

[0018] By means of the above technical scheme, when the first fine crushing disk and the second fine crushing disk rotate in opposite directions, the third gear of the first fine crushing disk drives the first gear in the second fine crushing disk to rotate, thereby driving the shearing convex teeth of the second fine crushing disk to rotate counterclockwise (the second fine crushing disk rotates counterclockwise under the drive of the driving mechanism), and the fourth gear of the second fine crushing disk drives the first gear in the first fine crushing disk to rotate, thereby driving the shearing convex teeth of the first fine crushing disk to rotate clockwise (the first fine crushing disk rotates clockwise under the drive of the driving mechanism). In this way, when the shearing convex teeth of the first fine crushing disk and the shearing convex teeth of the second fine crushing disk are staggered, the shearing protrusions on the shearing convex teeth rotate accordingly, and the shearing effect on the coarse crushed materials is stronger. Moreover, since the shearing protrusions rotate in the same direction as the corresponding fine crushing disks, the adjacent shearing protrusions also play a role of squeezing and unidirectional conveying for the coarse crushed materials, so as to reduce material jamming and ensure that the fine crushed materials can smoothly escape from the encirclement circle of the shearing protrusions, thereby ensuring the discharge speed, grinding effect and fine crushing efficiency.

[0019] In addition, the rolling protrusion rotates with the shearing convex teeth, and the rolling protrusion faces the extrusion surface. Therefore, the rolling protrusion can also cooperate with the micro-protrusions on the extrusion surface to further grind the fine crushed materials, thereby improving the crushing effect.

[0020] Optionally, the shearing protrusions are arranged in a spiral arrangement at intervals, and the shearing protrusions of the rotating shearing teeth are used to drive the fine crushed materials to move in a direction close to the corresponding extrusion surface.

[0021] Through the above technical solution, by providing spirally arranged shearing protrusions, the shearing protrusions of the rotating shearing teeth will drive the fine crushed materials to move in a direction close to the corresponding extrusion surface, that is, axial pressure is applied to the fine crushed materials to increase the grinding pressure between the fine crushed materials and the micro-protrusions of the extrusion surface, thereby improving the grinding effect.

[0022] The present application provides a molten salt heating type oxygen-free cracking carbonization system, which is specifically implemented by the following technical solutions: A molten salt heating type anaerobic cracking and carbonization system comprises in sequence a municipal hazardous solid waste crushing device, a sealed feeding device and a heating cracking device.

[0023] Optionally, the heating cracking device includes a molten salt furnace, a molten salt pump and a cracking container, the cracking container has a heat exchanger, the molten salt furnace heats the molten salt, and the molten salt pump pumps the molten salt into the heat exchanger.

[0024] The beneficial effects of this application are: 1. By providing a fine crushing disc assembly, arc-arranged shearing protrusions, an extrusion surface and micro-protrusions, the coarse crushed material can be further crushed under the action of the shearing protrusions to produce fine crushed material, and with the rotation, the intersection of the shearing protrusions of the first fine crushing disc and the shearing protrusions of the second fine crushing disc will move from the radial outside to the inside, and the area of ​​the area enclosed by the shearing protrusions of the first fine crushing disc and the shearing protrusions of the second fine crushing disc will gradually decrease, so as to continuously apply pressure to the fine crushed material in the enclosed area, so as to force the fine crushed material to move radially inward, and the micro-protrusions of the extrusion surface rotating in opposite directions will grind the fine crushed material, and as the fine crushed material moves radially inward, the micro-protrusions will gradually grind the fine crushed material, so that the particle size uniformity and particle size of the fine crushed material are extremely well controlled; secondly, compared with the existing multi-stage crushing, the present application uses two crushing structures, i.e., the particle size uniformity and particle size are extremely well controlled, and the energy consumption is low; 2. A hydraulic cylinder is provided to drive the first fine crushing disk to move axially, so as to change the axial distance between the first fine crushing disk and the second fine crushing disk, so as to eat more coarse crushed materials at one time, and to facilitate the extrusion surfaces of the first fine crushing disk and the second fine crushing disk to embrace the coarse crushed materials, so as to apply axial pressure to the coarse crushed materials, which has a better grinding effect on the fine crushed materials, and the particle size of the fine crushed materials is more uniform and refined; 3. By setting rotatable shearing teeth, shearing protrusions and rolling protrusions, the shearing effect on coarse crushed materials is stronger. Moreover, since the shearing protrusions rotate in the same direction as the corresponding fine crushing discs, the adjacent shearing protrusions also play a role in extrusion and one-way transportation for the coarse crushed materials, so as to reduce material jamming and ensure that the fine crushed materials can smoothly break away from the encirclement circle of the shearing teeth, thereby ensuring the discharge speed, grinding effect and fine crushing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the molten salt heating anaerobic cracking carbonization system of Example 1.

[0026] Figure 2 It is a cross-sectional view of the urban hazardous solid waste crushing device of Example 1.

[0027] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0028] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0029] Figure 5 It is a schematic diagram of Example 1 for illustrating the change in position of the shearing lobes of the first fine crushing disk and the second fine crushing disk.

[0030] Figure 6 It is a cross-sectional view of the second shell of Example 2.

[0031] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle.

[0032] Figure 8 yes Figure 6 A partial enlarged view of point D in the middle.

[0033] Fig. 9 4 is a cross-sectional view of a crushing disk assembly of Example 3.

[0034] Fig.10 yes Fig. 9 A partial enlarged view of point E in the middle.

[0035] Fig.11 It is a schematic diagram of Example 3 for illustrating the matching position relationship between the first gear and the second gear of adjacent shearing teeth.

[0036] Fig.12 It is a schematic diagram of Example 3 for illustrating the rotation direction of the second fine crushing disk and the rotation direction of the shearing lobes.

[0037] Description of reference numerals: 100, urban hazardous solid waste crushing device; 101, first shell; 102, second shell; 103, crushing roller; 104, feed port; 105, receiving port; 106, discharge port; 107, auxiliary strip; 10, installation cavity; 11, first fine crushing plate; 111, slide groove; 112, first main body; 113, first matching sleeve; 114, first rib; 12, second fine crushing plate; 121, extrusion surface; 122, guide surface; 123, shearing convex teeth; 1231, shearing protrusion; 1232, rolling protrusion; 1 24. radial ball bearing; 125. blocking ring; 126. second main body; 127. second matching sleeve; 128. second rib; 200. sealing feeding device; 21. transmission shaft; 211. key block; 212. keyway; 213. moving shaft; 214. clip; 215. plane thrust bearing; 22. second driving motor; 23. worm; 25. worm wheel; 300. heating and cracking device; 31. first rotating sleeve; 311. third gear; 32. second rotating sleeve; 321. fourth gear; 33. first gear; 34. second gear. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the attached Figure 1-Figure 12 Shown in.

[0039] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0040] Example 1 Example 1 discloses a molten salt heating type oxygen-free cracking carbonization system, such as Figure 1 As shown, the molten salt heating anaerobic cracking carbonization system includes a city hazardous solid waste crushing device 100, a sealed feeding device 200 and a heating cracking device 300 in sequence, wherein the city hazardous solid waste crushing device 100 is used for coarsely crushing, finely crushing and grinding the solid waste in sequence, the sealed feeding device 200 is used for conveying the crushed material to the heating cracking device 300, and the sealed feeding device 200 can adopt the sealed piston feeding system in the Chinese patent with announcement number CN116875338A to realize anaerobic conveying, which will not be elaborated here, and the heating cracking device 300 is used for anaerobic heating and cracking treatment of the crushed material.

[0041] In this embodiment, the heating cracking device 300 includes a molten salt furnace, a molten salt pump and a cracking container (not shown in the figure). The cracking container has a heat exchanger. The molten salt furnace heats the molten salt. The molten salt pump pumps the molten salt into the heat exchanger. The heat of the molten salt is transferred to the molten salt furnace through the heat exchanger to heat the crushed material at high temperature.

[0042] It should be noted that the urban hazardous solid waste crushing device 100 of the present application is not only used for anaerobic pyrolysis pretreatment, but can also be used for other crushing pretreatments in solid waste treatment processes.

[0043] like Figure 2 , Figure 3 As shown, the urban hazardous solid waste crushing device 100 includes a shell, a driving mechanism, two crushing rollers 103 and a plurality of fine crushing disk assemblies, wherein the shell includes a square first shell 101 and a cylindrical second shell 102 from top to bottom, the axis of the second shell 102 is arranged horizontally, that is, the second shell 102 is arranged horizontally, the upper part of the first shell 101 has a feed port 104, the lower part of the first shell 101 is connected to the second shell 102 through a socket 105, the lower part of the second shell 102 has a discharge port 106, the crushing rollers 103 are installed on the first shell 101, the two crushing rollers 103 are arranged horizontally side by side, and the fine crushing disk assembly is installed on the second shell 102; the crushing rollers 103 are used to coarsely crush the solid waste to form coarse crushed materials, the coarse crushed materials enter the second shell 102 through the socket 105, and the fine crushing disk assembly is used to crush and grind the coarse crushed materials in sequence to form fine crushed materials.

[0044] Each fine crushing disc assembly is arranged axially along the second shell 102, and the fine crushing disc assembly includes a first fine crushing disc 11 and a second fine crushing disc 12. The first fine crushing disc 11 and the second fine crushing disc 12 are both coaxially arranged with the second shell 102. Specifically, the second shell 102 is coaxially provided with a transmission shaft 21, both ends of the transmission shaft 21 pass through the side walls of the second shell 102, the transmission shaft 21 is rotatably matched with the second shell 102, and the transmission shaft 21 passes through the axis of the first fine crushing disc 11 and the second fine crushing disc 12, so that the first fine crushing disc 11 and the second fine crushing disc 12 are respectively coaxially arranged with the second shell 102.

[0045] Furthermore, the first crushing disc 11 and the transmission shaft 21 are in anti-rotation cooperation, and the anti-rotation cooperation can be a fixed cooperation, such as a key connection between the first crushing disc 11 and the transmission shaft 21, and the second crushing disc 12 and the transmission shaft 21 are rotationally cooperated through a radial ball bearing 124.

[0046] The driving mechanism is used to drive the first fine crushing disk 11 and the second fine crushing disk 12 to rotate in opposite directions. Specifically, the driving mechanism includes a first driving motor, a second driving motor 22, a worm 23 and an annular worm wheel 25. The first driving motor is installed on the outer side of the second housing 102 (not shown in the figure), and the first driving motor is fixed to one end of the transmission shaft 21 through a coupling. The first driving motor is used to drive the transmission shaft 21 to rotate, thereby driving the first fine crushing disks 11 to rotate together; the worm wheel 25 is sleeved and fixed to the outer diameter of the second fine crushing disk 12, the worm 23 is rotationally matched with the second housing 102, the worm 23 is located directly below the second fine crushing disk 12, and the worm 23 is meshed with the worm wheel 25; the second driving motor 22 is installed on the outer side of the second housing 102, and the second driving motor 22 is fixed to one end of the worm 23 through a coupling. The second driving motor 22 is used to drive the worm 23 to rotate, so as to drive the second fine crushing disk 12 to rotate, thereby realizing the first fine crushing disk 11 and the second fine crushing disk 12 to rotate in opposite directions.

[0047] The size of the receiving opening 105 is smaller than or equal to the radius of the first fine crushing disk 11 and the second fine crushing disk 12 to ensure that the coarse crushed materials passing through the crushing roller 103 can enter directly above the fine crushing disk assembly from the receiving opening 105 in a more concentrated manner, so as to feed the materials more accurately.

[0048] Secondly, a semi-arc auxiliary strip 107 is fixed to the inner wall of the second shell 102, and the cross section of the auxiliary strip 107 is triangular. One fine crushing disc assembly corresponds to two auxiliary strips 107, and the auxiliary strip 107 is located between the guide surface 122 of the first fine crushing disc 11 and the guide surface 122 of the second fine crushing disc 12. The outer wall of the auxiliary strip 107 is in contact with the guide surface 122, and the upper end of the auxiliary strip 107 is located at the receiving interface 105, and the lower end of the auxiliary strip 107 is higher than the axis of the fine crushing disc assembly; the auxiliary strip 107 facilitates guiding the coarse crushing material to enter more accurately above the fine crushing disc assembly, so as to reduce the coarse crushing material from falling directly out from the outer guide surface 122.

[0049] There is a gap between the first fine crushing disk 11 and the second fine crushing disk 12 of two adjacent fine crushing disk assemblies. In order to prevent the coarse crushed materials discharged from the receiving interface 105 from entering the gap, Figure 4 As shown, a shielding ring 125 is fixed at the outer diameter of the second fine crushing disk 12. The shielding ring 125 extends axially along the second fine crushing disk 12. The shielding ring 125 shields the outer diameter of the adjacent first fine crushing disk 11 to play a role in shielding the gap.

[0050] The opposing surfaces of the first crushing disk 11 and the second crushing disk 12 include an extrusion surface 121 and a guide surface 122 in sequence radially outward, and the generatrix inclination angle of the extrusion surface 121 is greater than the generatrix inclination angle of the guide surface 122, that is, along the radial outward direction, the axial distance between adjacent extrusion surfaces 121 gradually increases, and the axial distance between adjacent guide surfaces 122 gradually increases.

[0051] like Figure 2 As shown, the extrusion surface 121 is evenly distributed with micro protrusions (not shown in the figure), and the extrusion surface 121 is also fixed with multiple groups of circumferentially evenly distributed shearing convex teeth 123, the shearing convex teeth 123 can be cylindrical or square, and a group of shearing convex teeth 123 includes multiple shearing convex teeth 123 arranged at intervals along the arc, and the protruding direction of the arc path of the shearing convex teeth 123 deviates from the rotation direction of the extrusion surface 121 ( Figure 2 The direction of the middle arrow is the rotation direction of the second crushing disk 12, and the shearing teeth 123 of the first crushing disk 11 and the second crushing disk 12 are radially staggered to avoid interference and collision between the shearing teeth 123 when the first crushing disk 11 and the second crushing disk 12 rotate.

[0052] Moreover, the size of each shearing tooth 123 in the same group of shearing teeth 123 gradually increases along the axial direction away from the extrusion surface 121 , and the gap between adjacent shearing teeth 123 in the same group of shearing teeth 123 gradually increases along the axial direction away from the extrusion surface 121 .

[0053] The specific crushing steps are as follows: solid waste is put into the first shell 101 through the feed port 104 (suitable for continuous feeding or intermittent feeding), the crushing roller 103 roughly crushes the solid waste to form coarse crushed materials, the coarse crushed materials enter the second shell 102 through the receiving port 105, the coarse crushed materials slide down to between the extrusion surface 121 of the first fine crushing disk 11 and the extrusion surface 121 of the second fine crushing disk 12 under the guidance of the guide surface 122 and the auxiliary strip 107, and the coarse crushed materials are further crushed when the shearing convex teeth 123 rotating in opposite directions intersect to produce fine crushed materials, that is, in the first shell 102, the coarse crushed materials are crushed into fine crushed materials. The coarse crushed material is sheared and crushed at the intersection of the shearing convex teeth 123 of the first crushing disk 11 and the shearing convex teeth 123 of the second crushing disk 12 (the intersection can be understood as the intersection of two arcs with the same center of a circle), and because the shearing convex teeth 123 are arranged in an arc, and the protruding direction of the arc path deviates from the rotation direction of the extrusion surface 121, the intersection of the shearing convex teeth 123 of the first crushing disk 11 and the shearing convex teeth 123 of the second crushing disk 12 will move from the radial outside to the inside along the rotation (the position change process of the intersection can be referred to Figure 5, wherein the solid arc line and the solid arrow respectively represent the arc path of the shearing protruding teeth 123 of the second fine crushing disk 12 and the rotation direction of the second fine crushing disk 12, and the dotted arc line and the dotted arrow respectively represent the arc path of the shearing protruding teeth 123 of the first fine crushing disk 11 and the rotation direction of the first fine crushing disk 11), that is, the area enclosed by the shearing protruding teeth 123 of the first fine crushing disk 11 and the shearing protruding teeth 123 of the second fine crushing disk 12 gradually decreases, so as to continuously apply pressure to the fine crushed materials in the enclosed area, so as to force the fine crushed materials to move along the moving direction of the intersection, that is, to force the fine crushed materials to move along the moving direction of the intersection. The fine crushed material is moved radially inward, so during the movement of the fine crushed material, the fine crushed material continuously collides with the micro-protrusions of the extrusion surface 121, and the micro-protrusions of the extrusion surface 121 rotating in opposite directions will grind the fine crushed material, further refining the particle size of the fine crushed material, and because the distance between adjacent extrusion surfaces 121 gradually decreases radially inward, that is, the distance between the micro-protrusions of adjacent extrusion surfaces 121 gradually decreases, therefore, as the fine crushed material moves radially inward, the micro-protrusions will gradually grind the fine crushed material, so that the particle size uniformity and particle size of the fine crushed material are extremely well controlled. Secondly, compared with the existing multi-stage crushing, the present application uses two crushing structures, that is, the particle size uniformity and particle size are extremely well controlled, and the energy consumption is low.

[0054] Example 2 The difference between Example 2 and Example 1 is that Figure 6 , Figure 7 As shown, the transmission shaft 21 is a tubular structure, a key block 211 is fixed at the axis of the first crushing disk 11, a plurality of key blocks 211 are provided and are arranged at intervals along the circumference of the transmission shaft 21, and a key groove 212 extending along the axial direction is opened through the transmission shaft 21. The key block 211 and the key groove 212 are slidably matched to realize the torque transmission of the transmission shaft 21 to the first crushing disk 11, and at the same time, the first crushing disk 11 is allowed to slide axially for a short distance relative to the transmission shaft 21, and the length of the key groove 212 is less than the width of the first crushing disk 11, so that the inner diameter of the first crushing disk 11 can cover the key groove 212.

[0055] A hydraulic cylinder (not shown in the figure) is fixed to the outside of the second shell 102. The telescopic direction of the hydraulic cylinder is the axial direction of the transmission shaft 21. A movable shaft 213 is fixed to the telescopic end of the hydraulic cylinder. The movable shaft 213 passes through the second shell 102. The movable shaft 213 is axially slidably matched with the inner cavity of the transmission shaft 21. The movable shaft 213 is fixed with two annular clips 214. The two clips 214 are respectively abutted against the two axial ends of the key block 211 along the transmission shaft 21 through planar thrust bearings 215.

[0056] Furthermore, in order to ensure that after the first fine crushing disk 11 is axially displaced, the gap between the first fine crushing disk 11 and the second fine crushing disk 12 of the adjacent fine crushing disk assembly can be stably covered, as shown in FIG. Figure 8As shown, an annular sliding groove 111 is provided at the outer diameter of the first fine crushing disk 11 , and the shielding ring 125 of the second fine crushing disk 12 is slidably matched with the sliding groove 111 .

[0057] When the crushing process is intermittent feeding, the hydraulic cylinder drives the movable shaft 213 to move axially, and the clamping piece 214 of the movable shaft 213 drives the key block 211 and the first fine crushing plate 11 to move axially relative to the transmission shaft 21, so that the axial distance between the first fine crushing plate 11 and the second fine crushing plate 12 is increased, that is, there is enough space to accommodate more coarse crushed materials at one time. After the coarse crushed materials intermittently enter the second shell 102 from the first shell 101, the coarse crushed materials enter the extrusion surface 121 of the first fine crushing plate 11 and the second fine crushing plate 12. At the same time, the hydraulic cylinder drives the moving shaft 213 to move axially, so that the axial distance between the first fine crushing disk 11 and the second fine crushing disk 12 is reduced, and the extrusion surfaces 121 of the first fine crushing disk 11 and the second fine crushing disk 12 embrace the coarse crushing material and apply axial pressure to the coarse crushing material, and then the first fine crushing disk 11 and the second fine crushing disk 12 rotate in opposite directions to shear and grind the coarse crushing material, and under the condition of a certain axial pressure, the grinding effect on the fine crushing material is better, and the particle size of the fine crushing material is more uniform and refined.

[0058] Example 3 The difference between Example 3 and Example 1 is that Fig. 9 , Fig.10 As shown, the first fine crushing disc 11 and the second fine crushing disc 12 both have an installation cavity 10, that is, the first fine crushing disc 11 and the second fine crushing disc 12 are both hollow structures. Specifically, the first fine crushing disc 11 includes a first main body 112 and a first matching sleeve 113, the first main body 112 and the first matching sleeve 113 are fixedly connected by a first rib 114, the extrusion surface 121, the shearing protrusion 123 and the guide surface 122 are all arranged on the first main body 112, and the first matching sleeve 113 is fixedly sleeved on the transmission shaft 21; the second fine crushing disc 12 includes a second main body 126 and a second matching sleeve 127, the second main body 126 and the second matching sleeve 127 are fixedly connected by a second rib 128, the extrusion surface 121, the shearing protrusion 123 and the guide surface 122 are all arranged on the second main body 126, and the second matching sleeve 127 is rotatably sleeved on the transmission shaft 21.

[0059] like Fig.10 , Fig.11 As shown, in this embodiment, the shearing tooth 123 is set to be cylindrical, the axis of the shearing tooth 123 is parallel to the axis of the transmission shaft 21, the shearing tooth 123 is rotatably matched with the corresponding first body 112 or the second body 126, and the end of the shearing tooth 123 located in the installation cavity 10 is fixed with a first gear 33, and the inner wall of the installation cavity 10 is provided with a second gear 34, and the first gears 33 of two adjacent shearing teeth 123 are respectively meshed with the second gear 34.

[0060] A plurality of shearing protrusions 1231 are fixed to the outer circumferential surface of the shearing protrusions 123. The shearing protrusions 1231 of the first fine shredding disk 11 and the shearing protrusions 1231 of the second fine shredding disk 12 are arranged axially staggered along the shearing protrusions 123, that is, to ensure that the shearing protrusions 123 of the first fine shredding disk 11 and the shearing protrusions 123 of the second fine shredding disk 12 do not interfere with or collide with each other when they intersect. Furthermore, the arrangement of the shearing protrusions 1231 can be further limited. In this embodiment, the shearing protrusions 1231 are arranged in a spiral interval.

[0061] A plurality of circumferentially spaced rolling protrusions 1232 are fixed to the end surface of the shearing protrusion 123 .

[0062] like Fig.10 , Fig.12 As shown, the first matching sleeve 113 is fixed with the first rotating sleeve 31, and the first rotating sleeve 31 is rotatably sleeved on the outer side of the transmission shaft 21. One end of the first rotating sleeve 31 extends into the installation cavity 10 of the second fine crushing disk 12, and the end of the first rotating sleeve 31 is fixed with the third gear 311, and the third gear 311 is meshed with the first gear 33 in the installation cavity 10 of the second fine crushing disk 12.

[0063] A second rotating sleeve 32 is fixed to the inner diameter of the second main body 126. The second rotating sleeve 32 is sleeved on the outside of the first rotating sleeve 31. The second rotating sleeve 32 extends into the installation cavity 10 of the first fine crushing disk 11. A fourth gear 321 is fixed to the end of the second rotating sleeve 32. The fourth gear 321 meshes with the first gear 33 in the installation cavity 10 of the first fine crushing disk 11.

[0064] The shearing teeth 123 of the first fine crushing disk 11 and the first fine crushing disk 11 are both in clockwise direction, and the shearing teeth 123 of the second fine crushing disk 12 and the second fine crushing disk 12 are both in counterclockwise direction (the shearing teeth 123 of the second fine crushing disk 12 and the second fine crushing disk 12 are shown in FIG. Fig.12 direction of the arrow in the figure).

[0065] When the first crushing plate 11 and the second crushing plate 12 rotate in opposite directions, the third gear 311 of the first crushing plate 11 drives the first gear 33 in the second crushing plate 12 to rotate, thereby driving the shearing protruding teeth 123 of the second crushing plate 12 to rotate counterclockwise (the second crushing plate 12 rotates counterclockwise under the drive of the driving mechanism), and the fourth gear 321 of the second crushing plate 12 drives the first gear 33 in the first crushing plate 11 to rotate, thereby driving the shearing protruding teeth 123 of the first crushing plate 11 to rotate clockwise (the first crushing plate 11 rotates clockwise under the drive of the driving mechanism). In this way, when the shearing teeth 123 of the first fine crushing disk 11 and the shearing teeth 123 of the second fine crushing disk 12 are staggered, the shearing protrusions 1231 on the shearing protrusions 123 rotate accordingly, and the shearing effect on the coarse crushing material is stronger. Moreover, since the shearing protrusions 1231 rotate in the same direction as the corresponding fine crushing disk, the adjacent shearing protrusions 1231 also play a role of squeezing and one-way conveying for the coarse crushing material, so as to reduce material jamming and ensure that the fine crushing material can smoothly break away from the encirclement circle of the shearing protrusions 123, thereby ensuring the discharge speed, grinding effect and fine crushing efficiency.

[0066] Furthermore, the rolling protrusion 1232 rotates with the shearing protrusion 123 , and the rolling protrusion 1232 faces the extrusion surface 121 . Therefore, the rolling protrusion 1232 can also cooperate with the micro-protrusions of the extrusion surface 121 to further grind the fine crushed material, thereby improving the crushing effect.

[0067] Furthermore, by providing the spirally arranged shearing protrusions 1231, the shearing protrusions 1231 of the rotating shearing teeth 123 will drive the finely crushed materials to move in a direction close to the corresponding extrusion surface 121, that is, apply axial pressure to the finely crushed materials to increase the grinding pressure between the finely crushed materials and the micro-protrusions of the extrusion surface 121, thereby improving the grinding effect.

[0068] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A device for crushing urban hazardous solid waste, characterized in that: The invention comprises a shell, a driving mechanism, two crushing rollers (103) and a plurality of crushing disc assemblies. The shell comprises a square first shell (101) and a cylindrical second shell (102) from top to bottom. The axis of the second shell (102) is arranged horizontally. The upper part of the first shell (101) has a feed port (104). The lower part of the first shell (101) is connected to the second shell (102) through a socket (105). The lower part of the second shell (102) has a discharge port (106). The crushing roller (103) is mounted on the first shell (101). The crushing disc assembly is mounted on the second shell (102). Each crushing disc assembly is arranged axially along the second shell (102). The crushing disc assembly comprises a first crushing disc (11) and a second crushing disc (12). The first crushing disc (11) and the second crushing disc (12) are both arranged coaxially with the second shell (102). The socket (105) is connected to the second shell (102). The size of the first crushing disk (105) is smaller than or equal to the radius of the first crushing disk (11) and the second crushing disk (12), the driving mechanism is used to drive the first crushing disk (11) and the second crushing disk (12) to rotate in opposite directions, the opposing surfaces of the first crushing disk (11) and the second crushing disk (12) sequentially include an extrusion surface (121) and a guide surface (122) in a radially outward direction, and the generatrix inclination angle of the extrusion surface (121) is greater than the generatrix inclination angle of the guide surface (122). The extrusion surface (121) is evenly distributed with micro-protrusions, and the extrusion surface (121) is also provided with a plurality of groups of circumferentially evenly distributed shearing convex teeth (123), a group of shearing convex teeth (123) includes a plurality of shearing convex teeth (123) arranged at intervals along an arc, and the protruding direction of the arc path of the shearing convex teeth (123) deviates from the rotation direction of the extrusion surface (121), and the shearing convex teeth (123) of the first fine crushing disk (11) and the second fine crushing disk (12) are staggered in the radial direction.

2. The urban hazardous solid waste crushing device according to claim 1 is characterized in that: The size of each shearing convex tooth (123) of the same group of shearing convex teeth (123) gradually increases along the axial direction away from the extrusion surface (121), and the gap between adjacent shearing convex teeth (123) of the same group of shearing convex teeth (123) gradually increases along the axial direction away from the extrusion surface (121).

3. The urban hazardous solid waste crushing device according to claim 1 is characterized in that: A semi-arc-shaped auxiliary strip (107) is fixed to the inner wall of the second shell (102); the auxiliary strip (107) is located between the guide surface (122) of the first fine crushing disk (11) and the guide surface (122) of the second fine crushing disk (12); the cross section of the auxiliary strip (107) is triangular; the outer wall of the auxiliary strip (107) is in contact with the guide surface (122); the upper end of the auxiliary strip (107) is located at the receiving interface (105); and the lower end of the auxiliary strip (107) is higher than the axis of the fine crushing disk assembly.

4. The urban hazardous solid waste crushing device according to any one of claims 1 to 3, characterized in that: The driving mechanism comprises a first driving motor, a second driving motor (22), a transmission shaft (21), a worm (23) and an annular worm wheel (25); the transmission shaft (21) passes through the axes of the first fine crushing disc (11) and the second fine crushing disc (12) in sequence; the transmission shaft (21) is rotationally matched with the second housing (102); the first fine crushing disc (11) and the transmission shaft (21) are rotationally fixed; the first driving motor is used to drive the transmission shaft (21) to rotate; the second fine crushing disc (12) and the transmission shaft (21) are relatively rotationally matched; the worm wheel (25) is sleeved and fixed at the outer diameter of the second fine crushing disc (12); the worm (23) is rotationally matched with the second housing (102); the worm (23) is located directly below the second fine crushing disc (12); the worm (23) is meshed with the worm wheel (25); and the second driving motor (22) is used to drive the worm (23) to rotate.

5. The urban hazardous solid waste crushing device according to claim 4 is characterized in that: The transmission shaft (21) is a tubular structure. A key block (211) is fixed at the axis of the first crushing disk (11). A key slot (212) extending in the axial direction is provided through the transmission shaft (21). The inner diameter of the first crushing disk (11) blocks the key slot (212). The key block (211) and the key slot (212) are slidably matched. The second housing (102) is fixed with a hydraulic cylinder. The telescopic direction of the hydraulic cylinder is the axial direction of the transmission shaft (21). A movable shaft (213) is fixed at the telescopic end of the hydraulic cylinder. The movable shaft (213) and the inner cavity of the transmission shaft (21) are axially slidably matched. Two clips (214) are fixed to the movable shaft (213). The two clips (214) are respectively abutted against two ends of the key block (211) through planar thrust bearings (215).

6. The urban hazardous solid waste crushing device according to any one of claims 1 to 3, characterized in that: The shearing protrusion (123) is set to be cylindrical, the axis of the shearing protrusion (123) is parallel to the axis of the fine crushing disk assembly, the shearing protrusion (123) is rotatably matched with the extrusion surface (121), the first fine crushing disk (11) and the second fine crushing disk (12) both have a mounting cavity (10), a first gear (33) is fixed to the end of the shearing protrusion (123) located in the mounting cavity (10), a second gear (34) is provided on the inner wall of the mounting cavity (10), and two adjacent shearing protrusions ( The first gears (33) of the first and second gears (34) of the first and second crushing discs (12) are respectively meshed with the second gears (34); the first crushing disc (11) is fixed with a first rotating sleeve (31), the first rotating sleeve (31) extends into the mounting cavity (10) of the second crushing disc (12), a third gear (311) is fixed to the end of the first rotating sleeve (31), the third gear (311) is meshed with the first gear (33) in the mounting cavity (10) of the second crushing disc (12), and the second crushing disc (12) is fixed with a second rotating sleeve (32 ), the second rotating sleeve (32) is sleeved on the outside of the first rotating sleeve (31), the second rotating sleeve (32) extends into the installation cavity (10) of the first fine crushing disk (11), a fourth gear (321) is fixed to the end of the second rotating sleeve (32), and the fourth gear (321) is meshed with the first gear (33) in the installation cavity (10) of the first fine crushing disk (11); the shearing protruding teeth (123) of the first fine crushing disk (11) and the first fine crushing disk (11) are both turned clockwise, The shearing protrusion (123) of the second fine crushing disk (12) and the second fine crushing disk (12) both turn counterclockwise; a plurality of shearing protrusions (1231) are fixed on the outer peripheral surface of the shearing protrusion (123); the shearing protrusion (1231) of the first fine crushing disk (11) and the shearing protrusion (1231) of the second fine crushing disk (12) are axially staggered along the shearing protrusion (123); and a plurality of circumferentially spaced rolling protrusions (1232) are fixed on the end surface of the shearing protrusion (123).

7. The urban hazardous solid waste crushing device according to claim 6, characterized in that: The shearing protrusions (1231) are arranged in a spiral arrangement at intervals, and the shearing protrusions (1231) of the rotating shearing teeth (123) are used to drive the finely divided materials to move in a direction close to the corresponding extrusion surface (121).

8. A molten salt heating type oxygen-free cracking carbonization system, characterized in that: It comprises in sequence the urban hazardous solid waste crushing device (100) as claimed in claim 1, a sealed feeding device (200) and a heating cracking device (300).

9. The molten salt heating type anaerobic cracking carbonization system according to claim 8, characterized in that: The heating cracking device (300) comprises a molten salt furnace, a molten salt pump and a cracking container, wherein the cracking container has a heat exchanger, the molten salt furnace heats the molten salt, and the molten salt pump pumps the molten salt into the heat exchanger.

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