Household garbage incineration slag crushing and screening all-in-one machine

Abstract

The invention discloses a household garbage incineration slag crushing and screening all-in-one machine, and relates to the technical field of household garbage treatment. The all-in-one machine comprises a machining table, a screening mounting frame, a crushing mounting frame, a screening structure, a crushing structure and a material receiving box. Slag enters the crushing mounting frame through the feeding frame, is crushed by the crushing structure and then enters the screening mounting frame through the feeding limiting channel; the screening structure is driven to rotate, metal is adsorbed through the arc-shaped electromagnet, carbide is filtered through the screening frame, repeated circulating screening is achieved through the arc-shaped shoveling plate, and finally metal, carbide and non-metal slag are separated out and collected through the material collecting box and the material collecting frame. According to the slag crushing and screening device, slag crushing and screening integration is achieved, the problem that screening is not thorough due to accumulation is solved, and the metal recovery rate and the slag recycling purity are improved.

Description

Technical Field

[0001] This invention relates to the field of municipal solid waste treatment technology, and in particular to an integrated machine for crushing and screening municipal solid waste incinerator slag. Background Technology

[0002] In the field of municipal solid waste treatment, the effective treatment of incinerator ash is crucial for resource recovery and environmental protection. Municipal solid waste incinerator ash mainly consists of residues discharged from the tail end of the furnace bed. Its composition is complex, including molten slag, ferrous and non-ferrous metals, ceramic fragments, glass, other non-combustible materials, and unburned organic matter, accounting for about 80% of the total weight of ash. Before slag can be utilized for resource recovery, sorting is an essential step. Since slag discharged from the incinerator varies in size, larger pieces are less suitable for subsequent sorting operations. To address this issue, existing technologies typically employ crushing processes to break the slag into smaller pieces for easier sorting. For example, patent document CN202322198756.9 describes a crushing structure for slag crushing, aiming to lay the foundation for subsequent sorting.

[0003] However, slag often contains a large amount of metal waste, which poses a significant challenge to sorting. In actual sorting processes, slag is typically processed in batches. As shown in the comparative document above, when using a magnetic conveyor belt to screen metals from crushed slag, the automatic falling of slag easily leads to accumulation. When slag accumulates on the conveyor belt, its transport process is severely hindered, making it difficult to pass smoothly through the magnetic adsorption area. This results in the inability to effectively adsorb the metals, leaving some unsorted metals in the slag after sorting. This not only reduces the efficiency of metal resource recovery but also affects the purity and quality of subsequent slag resource utilization, increases the difficulty and cost of subsequent processing, and may also have potential negative environmental impacts. Therefore, there is an urgent need to develop equipment that can effectively solve the above-mentioned problems in slag crushing and sorting processes to improve the efficiency and quality of slag processing. Summary of the Invention

[0004] Based on this, the purpose of this invention is to overcome the problems of easy accumulation of slag after crushing and screening, incomplete metal separation, and difficulty in removing carbides in the prior art, and to provide an integrated crushing and screening machine for municipal solid waste incineration slag, so as to achieve efficient crushing, grading and screening of slag and precise separation of metals and carbides.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated crushing and screening machine for municipal solid waste incineration slag, comprising a processing table, a screening mounting frame, a screening structure, a crushing mounting frame, a feeding frame, a crushing structure, and a receiving box; the processing table has a hollow internal structure with an open top, at which the screening mounting frame is fixedly installed, the lower half of the screening mounting frame is located inside the processing table, a drive power supply is installed on the outside of the screening mounting frame, and the screening structure is rotatably installed inside, the screening structure being connected to the working end of the drive power supply; a crushing mounting frame is provided at the top of the screening mounting frame, and a feeding frame is provided at the top of the crushing mounting frame, with a feeding limiting channel connecting the feeding frame and the screening mounting frame inside, and a crushing structure inside; the slag enters the crushing mounting frame through the feeding frame, is crushed by the crushing structure, and then enters the screening mounting frame through the feeding limiting channel, where it is screened multiple times by the screening structure to distinguish sizes and separate metals; a receiving box located at the bottom of the screening mounting frame is provided inside the processing table for collecting the screened materials.

[0006] Furthermore, the screening mounting frame is circular in shape, with fixed mounting plates symmetrically provided on the upper ends of both sides, and is fixedly connected to the processing table by the fixed mounting plates and bolts.

[0007] Furthermore, the upper end of the screening mounting frame is provided with a feed inlet communicating with the crushing mounting frame, and the lower end is provided with a discharge port corresponding to the receiving box. A discharge plate is slidably installed at the discharge port, and a connecting pull plate located outside the screening mounting frame is provided on one side of the discharge plate. The opening and closing of the discharge port is controlled by the connecting pull plate.

[0008] Furthermore, a detachable sealing plate is provided on one side of the screening mounting frame. The sealing plate is fixed to the screening mounting frame by multiple positioning pins. An assembly hole is provided in the middle position. The assembly hole connects the inside and outside of the screening mounting frame and cooperates with the screening structure to discharge the carbonized material after screening. A placement rack is provided on the outside of the sealing plate and below the assembly hole. A receiving rack is provided inside the placement rack to receive the carbonized material.

[0009] Furthermore, the screening structure includes a screening frame, a rotating connecting frame, and a rotating connecting plate; The screening frame is fixed to a closed plate on one side and has an open side near the closed plate, with a filter hole at its upper end; one end of the rotating connecting frame is connected to a drive power supply and rotatably installed inside the screening mounting frame, and the other end is sleeved on the screening frame and rotates with it, with its upper and lower ends and interior being hollow; there are two rotating connecting plates, symmetrically arranged on both sides of the rotating connecting frame, each rotating connecting plate having an arc-shaped lifting plate, the arc-shaped lifting plate fitting against the inner wall of the screening mounting frame and having arc-shaped surfaces on both sides; arc-shaped electromagnets are installed at both the upper and lower ends of the two rotating connecting plates, and the two ends of the electromagnets are connected to the rotating connecting plates through the frame body.

[0010] Furthermore, the screening frame is provided with an inclined feeding plate, the lower end of which faces the closed plate, for guiding the carbides to the receiving frame.

[0011] Furthermore, the crushing structure includes a drive mounting frame, a drive power supply, two transmission gears, two transmission rods, and two crushing rollers; The drive mounting frame is installed on the crushing mounting frame, and a second drive power supply is installed on it; two transmission rods are rotatably installed between the crushing mounting frame and the drive mounting frame, and each transmission rod is provided with a transmission gear. The two transmission gears mesh with each other, and one of the transmission rods is connected to the second drive power supply; two crushing rollers are symmetrically rotatably installed in the crushing mounting frame and are respectively connected to the two transmission rods.

[0012] Furthermore, the receiving box is symmetrically equipped with opening and closing doors on both sides, and has a sliding plate inside that can slide left and right. The sliding plate divides the receiving box into two chambers for collecting non-metallic solids and metals respectively.

[0013] The present invention also discloses the working method of the above-mentioned all-in-one machine: The slag enters the crushing mounting frame through the feeding rack and is crushed by the crushing structure (simultaneously causing carbides to fall off the solid surface). After crushing, it enters the screening mounting frame through the feeding limiting channel. The slag falls onto the arc-shaped electromagnet and slides down from both sides. During the sliding process, the metal is attracted by the electromagnet, and some of the unattracted metal falls with other materials to the top of the rotating connecting plate. As the rotating connecting frame rotates, the material on the rotating connecting plate passes through the upper end of the screening frame, and the carbides (powder) enter the screening frame through the filter holes, then fall into the receiving frame through the inclined feeding plate and assembly holes. The material continues to fall to the bottom of the screening mounting frame as it rotates. When the feeding plate is closed, the arc-shaped lifting plate picks up the material and sends it back to the top of the rotating connecting plate, achieving multiple screenings. After screening, the feeding plate is opened to allow non-metallic solids to fall into one chamber of the receiving box, and the electromagnet is closed to allow metals to fall into the other chamber of the receiving box.

[0014] In summary, the present invention has the following main beneficial effects: 1. In this invention, the screening mounting frame adopts a circular design, which, together with the arc-shaped lifting plate driven by the rotating connecting frame, forms a screening space without dead corners: the arc-shaped lifting plate fits against the inner wall of the circle, and can pick up the slag that has fallen to the bottom during rotation, and send it back to the top of the rotating connecting plate to participate in screening again (cycle 3-5 times). This structure solves the problem of material accumulation in traditional conveyor belt screening, allowing each particle of slag to pass through the electromagnet and screening frame multiple times, ensuring sufficient screening. At the same time, the hollow design of the rotating connecting frame and the symmetrical layout of the rotating connecting plate ensure that the material is evenly dispersed during rotation, without any dead corners; 2. This invention utilizes the vertical connection between the crushing and screening mounting frames. After the slag enters the crushing structure (with double crushing rollers rotating relative to each other) via the feeding frame, it is directly fed into the screening mounting frame through the feeding limiting channel, eliminating the need for intermediate transfer. The squeezing action of the crushing structure and the rotating screening of the screening structure form a continuous process, reducing material residence time and solving the inefficiency problem caused by the disconnect between crushing and screening in traditional equipment. Specifically, the tooth design of the crushing rollers ensures that the slag is crushed to a uniform particle size (5-20mm), laying the foundation for subsequent screening, while the feeding limiting channel guides the material directionally into the screening area, avoiding dispersion and waste.

[0015] 3. In this invention, arc-shaped electromagnets are installed at both the upper and lower ends of the screening structure. Their curvature matches the rotation trajectory, allowing them to contact the material from different angles during rotation. Combined with the circulating screening mechanism, metals not initially adsorbed will pass through the electromagnet area again with the material and be adsorbed a second time. Furthermore, the controllable on / off design of the electromagnets allows for the centralized release of metals to the collection bin after screening, preventing mixing of metals and non-metals. This combination of "multiple contact + circulating adsorption" (with the electromagnets working in conjunction with the rotating connecting plate and the arc-shaped lifting plate) significantly improves the metal recovery rate.

[0016] 4. In this invention, the extrusion action of the crushing structure causes carbides to detach from the solid surface. The powdered carbides (particle size <1mm) formed after crushing fall into the screening frame through the filter holes (0.5-1mm) at the upper end of the screening frame during the screening process. They are then guided by the inclined feeding plate (30° inclination) to the assembly holes of the closed plate and finally collected by the receiving frame. In this process, the open design of the screening frame and the assembly holes of the closed plate are precisely aligned, and the inclined feeding plate ensures that no residual carbides fall, solving the problem of carbides and slag mixing affecting resource utilization in traditional equipment, and providing pure raw materials for subsequent slag regeneration (such as the preparation of building materials).

[0017] 5. In this invention, the closed plate on one side of the screening mounting frame is detachable via a positioning pin, facilitating cleaning of the screening structure (such as the screening frame filter screen and electromagnet surface) after opening. The sliding plate of the receiving box can divide the chambers to collect non-metallic slag and metal separately, and the two side opening and closing doors facilitate the classification and retrieval of materials. Furthermore, the discharge plate is manually opened and closed via a connecting pull plate, allowing flexible control of material discharge timing to adapt to different batch processing needs. These structural designs reduce equipment maintenance difficulty, decrease manual operation intensity, and indirectly improve the long-term operational stability of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the screening mounting frame in this invention; Figure 3This is a schematic diagram of the internal structure of the screening mounting frame and the crushing mounting frame in this invention; Figure 4 This is a partial schematic diagram of the present invention. Figure 1 ; Figure 5 This is a partial schematic diagram of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the screening mounting frame and screening structure in this invention; Figure 7 This is a schematic diagram of the screening mounting frame in this invention; Figure 8 This is a schematic diagram showing the disassembled sieving structure in this invention; Figure 9 This is a schematic diagram of the receiving box in this invention.

[0019] In the diagram: 1. Processing table; 2. Screening mounting frame; 21. Drive power supply one; 22. Fixed mounting plate; 23. Feed inlet; 24. Discharge outlet; 25. Discharge plate; 251. Connecting pull plate; 26. Sealing plate; 261. Positioning pin; 262. Assembly hole; 263. Placement frame; 264. Receiving frame; 3. Screening structure; 31. Screening frame; 311. Inclined discharge plate; 32. Rotating connecting frame; 33. Rotating connecting plate; 34. Arc-shaped lifting plate; 35. Electromagnet; 4. Crushing mounting frame; 41. Feeding limit channel; 5. Feeding frame; 6. Crushing structure; 61. Drive mounting frame; 62. Drive power supply two; 63. Transmission gear; 64. Transmission rod; 65. Crushing roller; 7. Receiving box; 71. Opening and closing door; 72. Sliding plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The embodiments of the present invention will now be described.

[0022] Example 1 like Figure 1-9 As shown, a municipal solid waste incinerator slag crushing and screening integrated machine includes a processing table 1, a screening mounting frame 2, a screening structure 3, a crushing mounting frame 4, a feeding frame 5, a crushing structure 6, and a receiving box 7. The specific structure and connection relationship of each component are as follows: Assembly of processing table and screening mounting frame The processing table 1 is a hollow rectangular frame structure with an opening on its upper surface that fits the screening mounting frame 2. The screening mounting frame 2 is cylindrical in shape, with two horizontal mounting plates 22 symmetrically welded to the upper part of its outer wall. The mounting plates 22 are fixedly connected to the upper surface of the processing table 1 by bolts, so that the lower half of the screening mounting frame 2 is embedded inside the processing table 1, while the upper half is exposed. This circular structure design can prevent slag from accumulating in corners and ensure uniform screening. The outer wall of the screening mounting frame 2 is fixedly mounted with a drive power supply 21 (using a servo motor) by a bracket. Its output shaft passes through the side wall of the screening mounting frame 2 and is connected to the internal screening structure 3 for transmission, providing power for the rotation of the screening structure 3. Detailed structure of the screening mounting frame The upper end face of the screening mounting frame 2 has a feed inlet 23 in the center for receiving crushed slag; the lower end face has an annular discharge port 24, and a discharge plate 25 (made of wear-resistant steel plate) of the same diameter is slidably embedded in the discharge port 24. A horizontal connecting pull plate 251 is welded to one side of the discharge plate 25, and the end of the connecting pull plate 251 extends to the outside of the screening mounting frame 2. The operator can control the opening or closing of the discharge port 24 by pushing or pulling the connecting pull plate 251. One side wall of the screening mounting frame 2 is a detachable closed plate 26. Four positioning pins 261 are evenly distributed along the edge of the closed plate 26, which are fixed by engaging with pin holes in the side wall of the screening mounting frame 2. A circular assembly hole 262 (with a diameter matching the opening of the screening frame 31) is provided at the center of the closed plate 26 for discharging carbides. A U-shaped placement frame 263 is welded to the outer side wall of the closed plate 26, directly below the assembly hole 262. A receiving rack 264 (using a plastic or metal box) is movably placed inside the placement rack 263 to collect the carbide powder discharged from the assembly hole 262. Composition and assembly of screening structure Screening structure 3 is the core component for achieving grading and metal separation, including screening frame 31, rotating connecting frame 32, and rotating connecting plate 33: The screening frame 31 is a rectangular frame with an open top. One side wall of the frame is welded and fixed to the inner side wall of the closed plate 26, and the position of the side wall corresponding to the assembly hole 262 is open. The upper surface of the screening frame 31 is covered with a stainless steel filter screen with filter holes (0.5-1mm in diameter) for filtering carbide powder. A sloping feed plate 311 (tilted at an angle of 30°) is welded inside the screening frame 31, with its lower end facing the open part of the closed plate 26 to ensure that the carbide powder slides smoothly into the assembly hole 262. The rotating connecting frame 32 is a cylindrical sleeve with openings at both ends. One end is rotatably mounted on the inner wall of the screening mounting frame 2 away from the closed plate 26 via a bearing, and is connected to the output shaft of the drive power supply 21 via a coupling. The other end is sleeved on the outer side of the screening frame 31 and rotates with a bearing. The upper and lower ends and the inside of the sleeve are hollow to avoid obstructing the flow of slag.

[0023] The rotating connecting plate 33 consists of two rectangular steel plates, symmetrically welded to the two side walls of the rotating connecting frame 32. An arc-shaped lifting plate 34 (with an arc matching the inner wall of the screening mounting frame 2) is welded to the outer side wall of each rotating connecting plate 33. The two sides of the arc-shaped lifting plate 34 have rounded edges to avoid scratching the slag. Arc-shaped electromagnets 35 (with curvature matching the rotation trajectory) are fixedly installed at the upper and lower ends of the two rotating connecting plates 33 via angle steel frames. The electromagnets 35 are electrically connected to an external power source, allowing control of the magnetic force and adsorption of ferromagnetic metals in the slag.

[0024] In this solution, the electromagnet 35 is a prior art technology known to those skilled in the art. It will not be described in detail in this application. Its main function in this application is to generate magnetic force to attract metals in the slag and to remove the magnetic force to make the metals attracted on the electromagnet 35 fall off.

[0025] Design of crusher mounting frame and crusher structure The top of the screening mounting frame 2 is fixedly mounted with a crushing mounting frame 4 (rectangular box structure) via a flange. A funnel-shaped feed rack 5 (300mm diameter at the top) is welded to the top of the crushing mounting frame 4 for feeding the slag to be processed. The crushing mounting frame 4 has a feed limiting channel 41 (inclined pipe, 100mm in diameter) inside. The upper end is connected to the crushing chamber, and the lower end is connected to the feed inlet 23 of the screening mounting frame 2 to ensure that the crushed slag enters the screening area in a directional manner. The crushing structure 6 is installed inside the crushing mounting frame 4, and includes a drive mounting frame 61, a drive power supply 62, a transmission gear 63, a transmission rod 64, and a crushing roller 65. The drive mounting bracket 61 is an L-shaped steel plate, welded to the outer wall of the crushing mounting bracket 4, and the drive power supply 62 (using a geared motor) is fixedly mounted on it by bolts. The transmission rod 64 consists of two horizontal stepped shafts, which are rotatably mounted between the front and rear side walls of the crushing mounting frame 4 via bearings. One end of the shaft extends to the inside of the drive mounting frame 61 and is fixedly fitted with a transmission gear 63. The two transmission gears 63 mesh with each other. The extended end of one of the transmission rods 64 is connected to the output shaft of the second drive power supply 62 via a coupling. The crushing rollers 65 are two cylindrical rollers with teeth (tooth height 5mm) on their surfaces. They are respectively fitted onto the sections of the two transmission rods 64 located inside the crushing mounting frame 4 and connected by a key. The gap between the two rollers is 5-10mm. The slag is crushed by relative rotation.

[0026] Structural design of receiving box Inside the processing table 1 is a receiving box 7 (rectangular box), located directly below the discharge port 24 of the screening mounting frame 2. A rectangular door 71 (with handle) is opened on each of the two side walls of the receiving box 7 for easy material removal. A sliding plate 72 (5mm thick steel plate) is slidably embedded inside the receiving box 7, which can move left and right along the inner wall, dividing the receiving box 7 into two independent chambers for collecting non-metallic slag and metallic materials, respectively. Work process Feeding and crushing: The slag to be processed is fed into the feed rack 5 and falls into the crushing chamber of the crushing mounting rack 4. The drive power supply 62 drives the two transmission rods 64 to rotate in opposite directions through the transmission gear 63, so that the two crushing rollers 65 rotate relative to each other, and crush the slag by squeezing (crushing large pieces of slag to a particle size of 5-20mm), while causing carbides to fall off from the surface of solids such as metals and ceramics. The crushed slag enters the feed port 23 of the screening mounting rack 2 through the feed limiting channel 41. Screening and metal adsorption: Slag falls into the screening mounting frame 2 and first contacts the rotating arc-shaped electromagnet 35. Metal is adsorbed onto the surface of the electromagnet 35. The remaining materials (non-metallic slag, carbides, and unadsorbed metals) slide from both sides of the electromagnet 35 onto the rotating connecting plate 33. As the rotating connecting frame 32 continues to rotate (speed 10-20 r / min), the material on the rotating connecting plate 33 is carried to the top of the screening frame 31. Carbide powder (particle size <1mm) falls into the screening frame 31 through the filter holes, slides onto the inclined feed plate 311 towards the assembly hole 262, and finally falls into the receiving frame 264. Circulating screening: Unfiltered material (non-metallic slag, unadsorbed metal) falls to the bottom of the screening mounting frame 2 as it rotates. At this time, the feed plate 25 is in the closed state. The rotating arc-shaped lifting plate 34 lifts up the material at the bottom and brings it back to the top of the rotating connecting plate 33. The above screening process is repeated (3-5 times) to ensure that the carbides are completely separated and the metal is fully adsorbed. Material collection: After screening, the operator pulls the connecting plate 251 to open the discharge port 24, and the non-metallic slag falls into one side chamber of the receiving box 7 (pre-separated by the sliding plate 72); the discharge port 24 is closed, the power supply of the electromagnet 35 is cut off, the adsorbed metal material falls off, and the discharge port 24 is opened again to let it fall into the other side chamber of the receiving box 7; finally, the material is taken out by opening and closing the door 71, completing one processing cycle. Through the above structure and process, this integrated machine realizes the integrated operation of slag crushing, carbide separation, metal sorting and graded collection, effectively solving the problem of incomplete screening caused by accumulation in the existing technology, and significantly improving the efficiency of slag treatment and the purity of resource recovery.

[0027] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A municipal solid waste incinerator slag crushing and screening integrated machine, characterized in that, The equipment includes a processing table (1), which is hollow inside and has an opening at the top. A screening mounting frame (2) is fixedly installed at the opening at the top of the processing table (1). The lower half of the screening mounting frame (2) is located inside the processing table (1). A screening structure (3) is provided inside the screening mounting frame (2). A drive power supply (21) is installed on the outside of the screening mounting frame (2). The screening structure (3) is rotatably installed inside the screening mounting frame (2) and connected to the working end of the drive power supply (21). The top of the screening mounting frame (2) is provided with a crushing mounting frame (4), and the top of the crushing mounting frame (4) is provided with a feeding frame (5). The crushing mounting frame (4) is provided with a feeding limiting channel (41) connecting the feeding frame (5) and the inside of the screening mounting frame (2). The crushing mounting frame (4) is also provided with a crushing structure (6). The slag can enter the crushing mounting frame (4) through the feeding frame (5) and be crushed by the crushing structure (6). The crushed slag enters the screening mounting frame (2) through the feeding limiting channel (41) and is screened multiple times by the screening structure (3) to distinguish the slag size and screen out the metal. The processing table (1) is equipped with a receiving box (7) located at the bottom of the screening mounting frame (2), and the receiving box (7) can hold the screened slag.

2. The integrated crushing and screening machine for municipal solid waste incinerator slag according to claim 1, characterized in that, The screening mounting frame (2) is circular in shape, and fixed mounting plates (22) are symmetrically provided on the upper ends of its two sides. The screening mounting frame (2) is mounted on the processing table (1) by two fixed mounting plates (22). The two fixed mounting plates (22) can fix the screening mounting frame (2) on the processing table (1) by bolts.

3. The integrated crushing and screening machine for municipal solid waste incineration slag according to claim 1, characterized in that, The upper end of the screening mounting frame (2) is provided with a feed inlet (23) that communicates with the crushing mounting frame (4), and the lower end is provided with a discharge port (24) corresponding to the receiving box (7). The screening mounting frame (2) is provided with a discharge plate (25) at the discharge port (24). The discharge plate (25) is slidably installed in the screening mounting frame (2). A connecting pull plate (251) located on the outside of the screening mounting frame (2) is provided on one side of the discharge plate (25). The discharge plate (25) can be pulled to move through the connecting pull plate (251) to open or close the discharge port (24).

4. The integrated crushing and screening machine for municipal solid waste incineration slag according to claim 1, characterized in that, The screening mounting frame (2) has a detachable sealing plate (26) on one side. After the sealing plate (26) is removed, the side end of the screening mounting frame (2) can be opened. The sealing plate (26) has multiple positioning pins (261) and is fixed to the screening mounting frame (2) by the positioning pins (261). The sealing plate (26) has an assembly hole (262) in the middle. The assembly hole (262) connects the inside and outside of the screening mounting frame (2) and is connected to the screening structure (3), so that some of the slag in the screening structure (3) can be discharged to the outside of the screening mounting frame (2).

5. The integrated crushing and screening machine for municipal solid waste incinerator slag according to claim 4, characterized in that, The outer side of the closed plate (26) is provided with a placement rack (263), which is located below the assembly hole (262). A receiving rack (264) is placed inside the placement rack (263), which can receive slag carbides discharged from the assembly hole (262).

6. The integrated crushing and screening machine for municipal solid waste incineration slag according to claim 1, characterized in that, The screening structure (3) includes a screening frame (31), a rotating connecting frame (32) and a rotating connecting plate (33). The screening frame (31) is fixedly installed on a closed plate (26) on one side and is open on the side close to the closed plate (26). The screening frame (31) is only provided with filter holes at the upper end. One end of the rotating connecting frame (32) is rotatably installed inside the screening mounting frame (2) and connected to the drive power supply (21), and the other end is sleeved on the screening frame (31) and rotates with it. The upper and lower ends and the interior of the rotating connecting frame (32) are hollow. There are two rotating connecting plates (33) symmetrically arranged on the left and right sides of the rotating connecting frame (32). Each rotating connecting plate (33) is provided with an arc-shaped lifting plate (34). Both arc-shaped lifting plates (34) are attached to the inner wall of the screening mounting frame (2) and are set with arc surfaces on both sides. An electromagnet (35) is installed at both the upper and lower ends of the two rotating connecting plates (33). Each electromagnet (35) is mounted on one side of the two rotating connecting plates (33) through a frame and is arranged in an arc shape.

7. The integrated crushing and screening machine for municipal solid waste incinerator slag according to claim 6, characterized in that, The screening rack (31) is provided with an inclined feeding plate (311). The inclined feeding plate (311) has one end facing downwards located on one side of the closed plate (26), which allows the carbides entering the screening rack (31) to slide into the receiving rack (264).

8. The integrated crushing and screening machine for municipal solid waste incinerator slag according to claim 1, characterized in that, The crushing structure (6) includes a drive mounting frame (61), a second drive power supply (62), a transmission gear (63), a transmission rod (64), and a crushing roller (65). The drive mounting frame (61) is mounted on the crushing mounting frame (4), and the second drive power supply (62) is mounted on the drive mounting frame (61). There are two transmission gears (63) and two transmission rods (64). Each transmission gear (63) is mounted on one transmission rod (64). One of the transmission rods (64) is connected to the working end of the second drive power supply (62). The two transmission gears (63) are rotatably mounted between the crushing mounting frame (4) and the drive mounting frame (61) through the transmission rod (64) and mesh with each other. There are two crushing rollers (65) that are symmetrically rotatably mounted in the crushing mounting frame (4). Each crushing roller (65) is connected to one transmission rod (64).

9. The integrated crushing and screening machine for municipal solid waste incinerator slag according to claim 1, characterized in that, The receiving box (7) has two symmetrically opened doors (71) on both sides, and a sliding plate (72) that can slide left and right is provided inside. The sliding plate (72) can divide the receiving box (7) into two chambers.

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