A waste residue pretreatment device

Abstract

The application relates to the technical field of waste residue crushing, in particular to a waste residue pretreatment device which comprises a crusher, a dust remover and a conveying belt matched with the crusher and the dust remover, a feeding cavity is arranged at the top of the crusher, a crushing cavity is communicated below the feeding cavity, a crushing roller is arranged in the crushing cavity, a screening cavity and a dust recovery cavity for screening the crushed waste residue and temporarily storing dust are communicated below the crushing cavity, a sieve plate is arranged between the screening cavity and the dust recovery cavity; the sieve plate is arranged in an inclined mode, side portions of the sieve plate are fixedly connected with sliding blocks, the sliding blocks are embedded in mounting grooves of a rack and linearly slide along the mounting grooves, at least one group of springs is connected with the bottom of the sliding blocks, and the axis of the springs is perpendicular to the plane of the sieve plate; the crushed particles impact the sieve plate after being buffered and dispersed by the buffer sieve plate, so that vibration is caused, dust attached to the large particles is stripped and falls into the dust recovery cavity, dust attached to the surface of the sieve plate is stripped, and the large particle waste residue is guided to automatically discharge by the inclined sieve plate.

Description

Technical Field

[0001] This application relates to the field of waste residue crushing technology, specifically a waste residue pretreatment device. Background Technology

[0002] In the process of recycling construction waste, non-metallic materials such as waste concrete and bricks need to be coarsely crushed by a crusher to meet the particle size requirements of the storage site for recycled aggregates.

[0003] Existing construction waste crushers only have a single crushing function, and the crushed mixture is discharged directly, forcing the addition of independent screening equipment in subsequent operations. This model results in large equipment footprints, multiple transfer links, and a high risk of repeated dust generation.

[0004] If a screening structure is integrated into the crusher, the dust generated during screening in the closed cavity cannot be effectively removed. After long-term use, the dust adheres to the surface of the screen plate, requiring the machine to be stopped for cleaning. During cleaning, the dust is stirred up, causing the aggregate to exceed the dust content standard and resulting in waste of resources. Summary of the Invention

[0005] To address the aforementioned problems, this application proposes a waste residue pretreatment device.

[0006] A waste residue pretreatment device includes a crusher, a dust collector, and a matching conveyor belt. It includes a feed chamber located at the top of the crusher, a crushing chamber connected below the feed chamber, a crushing roller installed inside the crushing chamber, the crushing roller being driven by a motor for crushing, and a screening chamber and a dust recovery chamber connected below the crushing chamber for screening the crushed waste and temporarily storing dust.

[0007] Furthermore, a buffer screen plate is installed between the crushing chamber and the screening chamber, and a screen plate is installed between the screening chamber and the dust recovery chamber.

[0008] Furthermore, a buffer screen plate is provided between the crushing chamber and the screening chamber to buffer the impact force of the crushed particles and disperse their falling position; to prevent the crushed particles from agglomerating and impacting the screen plate, thus affecting the service life of the screen plate.

[0009] A screen plate is provided between the screening chamber and the dust collection chamber; the screen plate is inclined and a slider is fixed to its side. The slider is embedded in the mounting groove of the frame and slides linearly along the mounting groove. At least one set of springs is connected to the bottom of the slider, and the spring axis is perpendicular to the plane of the screen plate.

[0010] Furthermore, the mounting slots are evenly distributed along the surface of the internal cavity of the crusher, and the edges of the mounting slots are provided with notches. The slider includes a mounting housing and a screen plate connector embedded in the mounting housing. The screen plate connector is connected to the inner surface of the mounting housing by a spring. The screen plate connector reciprocates linearly inside the mounting housing. One end of the screen plate connector extends out of the mounting housing and is fixedly connected to the screen plate. The surface of the mounting housing is provided with positioning blocks corresponding to the notches for easy installation.

[0011] After being crushed, the particles are dispersed by the buffer screen plate and then impact the screen plate, causing vibration. This forces the dust attached to the large particles to peel off and fall into the dust recovery chamber. At the same time, the dust attached to the surface of the screen plate is removed, and the tilted screen plate guides the large waste particles to be discharged automatically.

[0012] Furthermore, a first dust suppression component is provided on the feeding chamber. The first dust suppression component includes a nozzle fixing component sleeved on the outer edge of the crushing opening, and also includes a fastener detachably connected to the nozzle fixing component for clamping the outer edge of the crushing opening to fix the nozzle fixing component. The radial clamping of the circumferentially distributed fasteners forms an interference fit to resist crushing vibration and avoid spray deviation failure.

[0013] Furthermore, a water supply pipe is installed inside the nozzle fixing component, and nozzles connected to the water supply pipe are evenly distributed on the surface of the nozzle fixing component. The nozzles spray directly around the dust explosion point, and the water mist is completed before the dust spreads. Wear-resistant nozzles made of tungsten carbide are used. The nozzles are set at the edge of the crushing port to avoid collision between the waste material and the nozzles.

[0014] The crushed waste falls onto the screen plate, causing the screen plate to vibrate and forcing the dust attached to the large particles to peel off and fall off, passing through the screen holes and entering the dust removal system. The 20° to 30° tilt angle causes the large waste particles to move towards the discharge port under the action of gravity, and the waste is automatically discharged.

[0015] Furthermore, the dust collector includes a primary dust collector and a secondary dust collector for the crusher. The primary dust collector includes an acceleration section located at the top of the primary dust collector, which is connected to the screening chamber via a dust inlet channel. The connecting pipe between the primary and secondary dust collectors is inclined, allowing dust within the pipe to fall back to the settling section.

[0016] Furthermore, a constriction is connected below the acceleration section, which is a flow channel with a gradually decreasing cross-sectional area. The airflow accelerates to a turbulent state at the constriction, breaking up the dust film coating; high-speed dust and low-speed water mist collide head-on at the constriction; the sudden expansion structure induces vortices at the inlet of the sedimentation section, causing the moist dust to agglomerate and settle.

[0017] Furthermore, a spray system is installed on the surface of the acceleration section. The spray system includes a pressurized liquid pump, a delivery pipe, and nozzles installed around the surface of the acceleration section. The nozzles face the inlet of the acceleration section, forcing the dust and water mist to mix and condense at the constriction, causing the dust to agglomerate into large particles that settle. The constriction is made of stainless steel with an inner ceramic coating and is regularly acid-washed for maintenance.

[0018] Furthermore, a sedimentation section is connected below the constricted neck, and a discharge valve for discharging sedimented dust is provided at the bottom of the sedimentation section. The sedimentation section can also be equipped with a rotating scraper for automatic dust discharge.

[0019] Furthermore, it also includes a secondary dust collector inlet pipe for connecting the primary and secondary dust collectors. The secondary dust collector inlet pipe extends into the settling section, and the secondary dust collector is a bag filter. To avoid a mismatch between the negative pressure suction of the primary dust collector and the airflow of the secondary bag filter, which could lead to turbulent airflow in the screening chamber, a wind pressure sensor is installed to link with the variable frequency speed control of the fan for coordinated operation. The nozzles are electrically connected to the water supply pump, and the first and second dust suppression components are electrically connected to the pulverizer, adjusting according to the pulverizing conditions.

[0020] Furthermore, ultrafine particles not captured by the primary dust collector enter the bag filter for secondary filtration through the inlet pipe of the secondary dust collector. This combines wet and dry dust collection methods, covering the entire particle size range. The bag filter is located at the end of the filter, and the filter bags inside the bag filter are waterproof.

[0021] Based on the above structure, a second dust suppression component is installed at one end of the feeding chamber near the crushing chamber. The second dust suppression component includes an arc-shaped protective shell installed on the surface of the feeding chamber, with nozzles embedded on the surface of the arc-shaped protective shell. The nozzle fixing component is connected to a corrosion-resistant shell covering the surface of the feeding chamber. The second dust suppression component is located between the corrosion-resistant shell and the crushing chamber. A buffer rubber layer is set inside the shell. The corrosion-resistant shell and the arc-shaped protective shell are made of high-toughness duplex stainless steel. The corrosion-resistant shell withstands the impact of waste material and protects the nozzles of the second dust suppression component below from damage. At the same time, the shell and the wall of the feeding chamber form a labyrinth gap to block the dust overflow path and prevent the overflow of dust.

[0022] During operation, construction waste is conveyed to the feeding chamber by a conveyor belt. As the waste is about to enter the crushing chamber, the nozzle fixing piece fitted on the outer edge of the crushing opening first sprays an annular water mist, which quickly wraps around the falling concrete blocks or bricks. At the moment when the waste is hit by the high-speed impact of the crushing roller, a pre-wetted dust suppression layer is formed, which effectively suppresses the high-concentration dust explosion when silicate-based materials disintegrate.

[0023] The pre-wetted waste material is guided by the guide plate in the crushing chamber and crushed by the crushing rollers. After being crushed, the mixture is pre-screened by the buffer screen plate and falls into the screening chamber below.

[0024] The screen plate vibrates under the impact of the spring and the falling particles. The vibration removes residual dust from the surface of the aggregate and the micro-dust adhering to the surface of the screen plate and the screen holes, allowing the micro-dust to fall through the screen holes. At the same time, clean aggregate with qualified particle size falls along the inclined surface of the screen plate into the conveyor belt at the discharge port, realizing the instant classification of aggregate and surface dust removal. The floating dust air inlet channel at the top of the screening chamber continuously applies negative pressure, forcibly sucking the suspended micro-dust excited by the vibration into the dust recovery chamber, completely blocking the diffusion of dust in the equipment.

[0025] The dust-laden airflow enters the acceleration section of the primary dust collector, where it is initially mixed with the high-pressure water mist sprayed by the spray components. As the airflow passes through the constricted neck with a sharply reduced cross-sectional area, its velocity increases dramatically, creating high-speed turbulence that completely shatters the gas film coating on the dust surface. This forces silicate particles to collide violently with the water mist, causing the dust particles to agglomerate. Immediately afterward, the airflow suddenly expands and slows at the outlet of the settling section, causing the agglomerated dust clumps to settle to the bottom due to their increased weight. Finally, the remaining fine suspended particles enter the baghouse dust collector through the inlet pipe of the secondary dust collector, where they are deeply trapped by the high-efficiency filter media. The clean air is then transported by a fan to the chimney for discharge.

[0026] Compared with the prior art, this application has the following beneficial effects:

[0027] The buffer screen plate buffers and disperses the impact of high-speed crushed materials, reducing the risk of concentrated stress on the screen plate; the screen plate vibrates autonomously under the impact of particles, fully stripping dust from the surface of aggregates and dust adhering to the surface of the screen plate, simultaneously achieving crushing, screening and dry dust removal, improving overall work efficiency and resource utilization.

[0028] By pre-spraying water mist through nozzles at the crushing inlet to encapsulate the waste material, disintegration dust is suppressed; during the separation of aggregate and dust by the vibrating screen plate, the top negative pressure dust suction port immediately removes suspended particles; the dust-laden airflow is accelerated through the constriction of the dust collector, shattering the dust film and forcibly agglomerating it into large particles for sedimentation; the remaining suspended dust is finally filtered by a bag filter, reducing the risk of injury to construction workers. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the pretreatment device structure;

[0031] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0032] Figure 3 forFigure 1 Enlarged view of section B;

[0033] Figure 4 for Figure 1 Enlarged view of section C;

[0034] Figure 5 A schematic diagram of the connection structure between the housing and the sieve plate connector;

[0035] Figure 6 A schematic diagram of the connection structure between the housing and the sieve plate connector in another configuration.

[0036] Figure 7 This is a schematic diagram showing the installation location of the mounting slot;

[0037] Figure 8 Three-view diagram of the mounting housing;

[0038] Figure 9 This is a schematic diagram of a primary dust collector.

[0039] Figure 10 A schematic diagram of a primary dust collector with a constricted neck and an arc-shaped surface.

[0040] In the picture:

[0041] 1. Conveyor belt;

[0042] 2. Feed chamber;

[0043] 3. Crushing chamber; 301. Guide plate; 302. Buffer screen plate;

[0044] 4. Sieving chamber;

[0045] 5. Dust collection chamber;

[0046] 6. Primary dust collector;

[0047] 7. First dust suppression component; 701. Nozzle fixing component; 702. Water supply pipe; 703. Nozzle; 704. Corrosion-resistant housing; 705. Fastener;

[0048] 8. Secondary dust collector;

[0049] 9. Second dust suppression component; 901. Protective casing;

[0050] 10. Sieve plate;

[0051] 11. Slider;

[0052] 12. Mounting slot;

[0053] 13. Spring;

[0054] 14. Transfer trolley;

[0055] 15. Floating dust intake channel;

[0056] 16. Acceleration section;

[0057] 17. Necking section;

[0058] 18. Precipitation section;

[0059] 19. Inlet pipe of secondary dust collector;

[0060] 20. Spraying component;

[0061] 21. Fan;

[0062] 22. Chimney;

[0063] 23. Installation housing;

[0064] 24. Sieve plate connecting piece;

[0065] 25. Positioning block;

[0066] 26. Separation hole;

[0067] 27. Dust-proof curtain. Detailed implementation manners

[0068] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0069] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0070] Embodiment 1

[0071] As Figures 1-2 shown, a waste residue pretreatment device includes a crusher, a dust collector and a conveyor belt 1 supporting them. It is characterized in that it includes a feed cavity 2 located at the top of the crusher, a crushing cavity 3 connected to the feed cavity 2, a crushing roller installed in the crushing cavity 3, and a screening cavity 4 and a dust recovery cavity 5 located below the crushing cavity 3; a buffer sieve plate 302 is provided between the crushing cavity 3 and the screening cavity 4 for buffering the impact force of the crushed particles and dispersing their falling positions.

[0072] A screen plate 10 is provided between the screening chamber 4 and the dust collection chamber 5. The screen plate 10 is inclined, and a slider 11 is fixed to its side. The slider 11 is embedded in the mounting groove 12 of the frame and slides linearly along the mounting groove 12. At least one set of springs 13 is connected to the bottom of the slider 11, and the axis of the springs 13 is perpendicular to the plane of the screen plate 10. After being buffered and dispersed by the buffer screen plate 302, the crushed particles impact the screen plate 10, causing vibration, which forces the dust attached to the large particles to peel off and fall into the dust collection chamber 5. The inclined screen plate guides the large particles of waste material to be discharged automatically. The screen plate 10 is a bar-shaped screen plate.

[0073] Example 2

[0074] like Figures 4-7 As shown, based on Embodiment 1, the slider 11 includes a mounting housing 23 and a screen plate connector 24 embedded in the mounting housing 23. The screen plate connector 24 is connected to the inner surface of the mounting housing 23 by a spring 13. The screen plate connector 24 reciprocates linearly inside the mounting housing 23. One end of the screen plate connector 24 extends out of the mounting housing 23 and is fixedly connected to the screen plate 10. The mounting grooves 12 are evenly distributed along the surface of the internal cavity of the crusher. The edges of the mounting grooves 12 are provided with notches. The surface of the mounting housing 23 is provided with positioning blocks 25 corresponding to the notches, which facilitates quick identification of the upper and lower parts during installation and avoids incorrect installation. At the same time, the spring 13 is set inside the slider 11 and can be manufactured in the factory, simplifying the installation process.

[0075] Example 3

[0076] like Figures 1-2 As shown, based on Embodiment 1, the feeding chamber 2 is provided with a first dust suppression component 7. The first dust suppression component 7 includes a nozzle fixing component 701 sleeved on the outer edge of the crushing opening, and also includes a fastener 705 detachably connected to the nozzle fixing component 701 for clamping the outer edge of the crushing opening to fix the nozzle fixing component 701; the radial clamping of the circumferentially distributed fasteners 705 forms an interference fit to resist crushing vibration and avoid spray deviation failure.

[0077] The nozzle fixing component 701 is provided with a water supply pipe 702 inside, and the nozzles 703 connected to the water supply pipe 702 are evenly distributed on the surface of the nozzle fixing component 701. The nozzles 703 spray directly around the dust explosion point, and the water mist completes the coating before the dust spreads.

[0078] Example 4

[0079] like Figure 3As shown in the figure, on the basis of Embodiment 1, a second dust suppression component 9 is installed at one end of the feed chamber 2 close to the crushing chamber 3. The second dust suppression component 9 includes an arc-shaped protective shell installed on the surface of the feed chamber 2. Nozzles 703 are embedded on the surface of the arc-shaped protective shell. The nozzle fixing member 701 is connected to a corrosion-resistant shell 704 covering the surface of the feed chamber. The second dust suppression component 9 is disposed between the corrosion-resistant shell 704 and the crushing chamber 3. The corrosion-resistant shell 704 withstands the impact of waste materials, protecting the nozzles 703 of the second dust suppression component 9 below from being damaged. At the same time, a labyrinth gap is formed between the shell and the wall of the feed chamber, blocking the path of dust overflow.

[0080] Embodiment 5

[0081] As Figures 1-2 , as shown in FIGS. 4 to 8, a waste residue pretreatment device includes a crusher, a dust collector, and a conveyor belt 1 supporting them. It is characterized in that it includes a feed chamber 2 located at the top of the crusher, a crushing chamber 3 connected to the feed chamber 2, crushing rolls installed in the crushing chamber 3, and a screening chamber 4 and a dust recovery chamber 5 located below the crushing chamber 3. A buffer sieve plate 302 is provided between the crushing chamber 3 and the screening chamber 4, which is used to buffer the impact force of the crushed particles and disperse their falling positions.

[0082] A sieve plate 10 is provided between the screening chamber 4 and the dust recovery chamber 5. The sieve plate 10 is inclined. A slider 11 is fixedly connected to its side. The slider 11 is embedded in the installation groove 12 of the frame and slides linearly along the installation groove 12. At least one set of springs 13 is connected to the bottom of the slider 11. The axis of the spring 13 is perpendicular to the plane of the sieve plate 10.

[0083] Furthermore, the installation grooves 12 are evenly distributed along the surface of the inner cavity of the crusher. A notch is provided at the edge of the installation groove 12. The slider 11 includes an installation shell 23 and a sieve plate connecting member 24 embedded in the installation shell 23. The sieve plate connecting member 24 is connected to the inner surface of the installation shell 23 through a spring 13. The sieve plate connecting member 24 reciprocates linearly inside the installation shell 23. One end of the sieve plate connecting member 24 extends out of the installation shell 23 and is fixedly connected to the sieve plate 10. A positioning block 25 corresponding to the notch is provided on the surface of the installation shell 23 to facilitate positioning the installation shell 23 up and down during installation. A separation hole 26 is provided at the bottom of the installation groove 12. The separation hole 26 penetrates the bottom of the installation groove 12. Threads are provided on the surface of the separation hole 26. When the slider 11 needs to be separated, a threaded rod is aligned with the separation hole 26 and screwed in to push the slider 11 out of the installation groove 12. A dust-proof curtain 27 is installed at the edge of the installation groove.

[0084] After being buffered and dispersed by the buffer screen plate 302, the crushed particles impact the screen plate 10, causing vibration. This forces the dust attached to the large particles to peel off and fall into the dust recovery chamber 5. The inclined screen plate guides the large waste particles to be discharged automatically. The screen plate 10 is a bar-shaped screen plate. A baffle is installed at one end of the screen plate 10 near the discharge port. One end of the baffle is hooked and hooks the grid bars on the screen plate 10, while the other end overlaps at the discharge port to facilitate the output of crushed particles.

[0085] The feeding chamber 2 is provided with a first dust suppression component 7. The first dust suppression component 7 includes a nozzle fixing component 701 sleeved on the outer edge of the crushing opening. A water supply pipe 702 is provided inside the nozzle fixing component 701. Nozzles 703 connected to the water supply pipe 702 are evenly distributed on the surface of the nozzle fixing component 701. It also includes a fastener 705 detachably connected to the nozzle fixing component 701 for clamping the outer edge of the crushing opening to fix the nozzle fixing component 701.

[0086] The screen plate 10 is set at an angle of 20° to 30° to the horizontal plane. The 20° to 30° angle of inclination causes large particles of waste to move towards the discharge port under the action of gravity and be discharged automatically.

[0087] The dust collector includes a primary dust collector 6 and a secondary dust collector 8 for the crusher. The primary dust collector 6 includes an acceleration section 16 located at the top of the primary dust collector 6. The acceleration section 16 is connected to the screening chamber 4 through a floating dust inlet channel 15.

[0088] Below the acceleration section 16 is a constriction 17, which is a flow channel with a gradually decreasing cross-sectional area. The airflow is accelerated to a turbulent state at the constriction 17, breaking up the dust film coating layer; high-speed dust and low-speed water mist collide head-on at the constriction 17; the sudden expansion structure induces vortices at the inlet of the sedimentation section 18, causing the moist dust to agglomerate and settle.

[0089] A spraying component 20 is installed on the surface of the acceleration section 16. The spraying component 20 includes a pressurized liquid pump, a liquid delivery pipe, and a nozzle 703 installed around the surface of the acceleration section 16. The spraying direction of the nozzle 703 is towards the flow direction of the dust airflow in the acceleration section 16, so that the dust and water mist are forcibly mixed and condensed at the neck 17.

[0090] The neck 17 is connected to a sedimentation section 18 below, and the bottom end of the sedimentation section 18 is provided with a discharge valve for discharging sedimented dust.

[0091] It also includes a secondary dust collector inlet pipe 19 for connecting the primary dust collector 6 and the secondary dust collector 8. The secondary dust collector inlet pipe 19 extends into the sedimentation section 18. The secondary dust collector 8 is a bag filter.

[0092] Ultrafine particles not captured by the primary dust collector enter the secondary bag filter for secondary filtration through the air inlet pipe 19 of the secondary dust collector. The combination of wet and dry dust collection increases the particle size range covered by the device. Finally, the clean air is delivered to the chimney 22 by the fan 21 and discharged.

Claims

1. A waste residue pretreatment device, comprising a crusher, a dust collector, and a matching conveyor belt (1), characterized in that: It includes a feed chamber (2) located at the top of the crusher, a crushing chamber (3) connected to the feed chamber (2), a crushing roller installed in the crushing chamber (3), and a screening chamber (4) and a dust recovery chamber (5) located below the crushing chamber (3); a buffer screen plate (302) is provided between the crushing chamber (3) and the screening chamber (4) to buffer the impact force of the crushed particles and disperse their falling position; A screen plate (10) is provided between the screening chamber (4) and the dust recovery chamber (5); the screen plate (10) is inclined and a slider (11) is fixed to its side. The slider (11) is embedded in the mounting groove (12) on the surface of the internal cavity of the crusher. The mounting groove (12) is evenly distributed along the surface of the internal cavity of the crusher. The slider (11) includes a mounting housing (23) and a screen plate connector (24) embedded in the mounting housing (23). The screen plate connector (24) is connected to the inner surface of the mounting housing (23) by a spring (13). The axis of the spring (13) is perpendicular to the plane of the screen plate (10). After being buffered and dispersed by the buffer screen plate (302), the crushed particles impact the screen plate (10) and cause vibration, causing small dust particles to fall into the dust recovery chamber (5).

2. The waste residue pretreatment device according to claim 1, characterized in that: The mounting groove (12) has a notch at its edge, and the mounting housing (23) has a positioning block (25) corresponding to the notch on its surface.

3. The waste residue pretreatment device according to claim 1, characterized in that: The feeding chamber (2) is provided with a first dust suppression component (7). The first dust suppression component (7) includes a nozzle fixing component (701) sleeved on the outer edge of the crushing opening. A water supply pipe (702) is provided inside the nozzle fixing component (701). Nozzles (703) communicating with the water supply pipe (702) are evenly distributed on the surface of the nozzle fixing component (701). It also includes a fastener (705) detachably connected to the nozzle fixing component (701) for clamping the outer edge of the crushing opening to fix the nozzle fixing component (701).

4. The waste residue pretreatment device according to claim 3, characterized in that: A second dust suppression component (9) is installed at one end of the feed chamber (2) near the crushing chamber (3). The second dust suppression component (9) includes an arc-shaped protective shell installed on the surface of the feed chamber (2). A nozzle (703) is embedded on the surface of the arc-shaped protective shell. The nozzle fixing component (701) is connected to a corrosion-resistant shell (704) covering the surface of the feed chamber. The second dust suppression component (9) is disposed between the corrosion-resistant shell (704) and the crushing chamber (3). A buffer rubber layer is provided on the surface of the corrosion-resistant shell (704) near the crushing chamber (3).

5. The waste residue pretreatment device according to claim 1, characterized in that: The dust collector includes a primary dust collector (6) and a secondary dust collector (8) for the crusher. The primary dust collector (6) includes an acceleration section (16) located at its top, which is connected to the screening chamber (4) through a floating dust inlet channel (15).

6. The waste residue pretreatment device according to claim 5, characterized in that: The acceleration section (16) is connected to a neck (17) below it, and the neck (17) is a flow channel with a gradually decreasing cross-sectional area.

7. A waste residue pretreatment device according to claim 6, characterized in that: A spraying component (20) is installed on the surface of the acceleration section (16). The spraying component (20) includes a pressurized liquid pump, a liquid delivery pipe, and a nozzle (703) installed around the surface of the acceleration section (16). The spraying direction of the nozzle (703) is toward the flow direction of the dust airflow in the acceleration section (16), so that the dust and water mist are forcibly mixed and condensed at the constriction (17).

8. A waste residue pretreatment device according to claim 6, characterized in that: The neck (17) is connected to a sedimentation section (18) below, and the bottom of the sedimentation section (18) is provided with a discharge valve for discharging sedimented dust.

9. A waste residue pretreatment device according to claim 8, characterized in that: It also includes a secondary dust collector inlet pipe (19) for connecting the primary dust collector (6) and the secondary dust collector (8), the secondary dust collector inlet pipe (19) extending into the sedimentation section (18), the secondary dust collector (8) being a bag filter.

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