Vibrating screen with adjustable screen surface inclination angle and garbage treatment system using same

Abstract

The vibrating screen with the adjustable screen face inclination angle comprises a rack, and a composite screen body and a driving assembly used for driving the composite screen body to vibrate are arranged on the rack; the composite screen main body comprises a frame body and a bar screen arranged on the frame body; the bar screen comprises a first screen plate group and a second screen plate group; the first screen plate group and / or the second screen plate group are / is movably arranged relative to the frame body; the composite screen body further comprises an adjusting assembly arranged on the frame body, the adjusting assembly is used for adjusting the first screen plate set and / or the second screen plate set relative to the frame body, and the technical effects of accurate and cooperative control over the distribution thickness, the residence time and the flowing speed of materials in different sections of the screen surface and the like can be achieved. Therefore, the comprehensive technical effects of effectively preventing the screen surface from being blocked and remarkably improving the unit time handling capacity and the screening precision of the equipment are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibrating screen, in particular to a vibrating screen with adjustable screen surface inclination angle and a garbage treatment system using the vibrating screen. BACKGROUND

[0002] The stale garbage in non-standard garbage landfill sites in South China has the characteristics of high soil content and high water content. Especially during the rainy season (April-September) in South China, the material water content will be even higher. For materials with high soil content, the existing screening process cannot guarantee the screening quality and efficiency, and production needs to be stopped during continuous rainfall, which seriously affects the project schedule and increases operating costs.

[0003] The current traditional screening process system in the industry is: plate feeder → vibrating rod screen → magnetic separator → manual sorting platform → drum screen (2-3 stages) → air separator (2-3 stages). The system uniformly feeds through the plate feeder, removes oversized materials (stones, wood) in the material through the rod screen, removes scrap iron in the material through the magnetic separator, removes large light materials that cannot be removed by the rod screen through the manual sorting platform, separates the material into different sizes through multiple drum screens according to different hole diameters, and finally separates the light and small materials from the heavy materials in the material according to different densities through multiple air separators.

[0004] Due to the late start of the domestic garbage screening industry, the process equipment is still in the initial research and development stage, resulting in the current entire garbage screening board in China, including construction waste screening, household garbage screening, and stockpiled garbage screening, all using the initial drum screen plus air separation screening process system introduced from abroad. There is no targeted screening process system developed for different garbage categories, different ingredient proportions, and water content parameters in China. The current situation is that one process system screens all types of garbage in China, resulting in actual application effects much lower than expected. Therefore, a vibrating screen with adjustable screen surface inclination angle and a garbage treatment system using the vibrating screen are proposed. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a vibrating screen with adjustable screen surface inclination angle and a garbage treatment system using the vibrating screen.

[0006] The technical scheme adopted by the present application to solve its technical problems is: The present application provides a vibrating screen with adjustable screen surface inclination angle, which comprises a rack, a composite screen main body provided on the rack, and a driving assembly for driving the composite screen main body to vibrate; the composite screen main body comprises a frame body and a rod screen provided on the frame body; The rod screen comprises a first screen plate group and a second screen plate group, and the first screen plate group and / or the second screen plate group are movably arranged relative to the frame body; The composite screen body further comprises an adjusting assembly arranged on the frame body, and the adjusting assembly is used for adjusting the first screen plate group and / or the second screen plate group relative to the frame body.

[0007] Preferably, the first screen plate group and the second screen plate group are each composed of a plurality of screen plate components, and the adjusting assembly comprises a first driving member and a second driving member, the first driving member being used for angle adjustment of the plurality of screen plate components included in the first screen plate group, and the second driving member being used for angle adjustment of the plurality of screen plate components included in the second screen plate group. By arranging the first screen plate group and the second screen plate group to each be composed of a plurality of screen plate components, and configuring the first driving member and the second driving member for adjusting the two respectively, the independent and fine angle control of the first screen plate group and the second screen plate group is achieved, and the inclination angle of the screen surface is accurately adjusted according to the different screening section requirements, so as to optimize the material flow rate and the screening effect of each section.

[0008] Preferably, the screen surfaces of the plurality of screen plate components included in the first screen plate group are parallel, the screen surfaces of the plurality of screen plate components included in the second screen plate group are parallel, the first screen plate group is located at one end of the frame body for feeding, the second screen plate group is located at one end of the frame body for discharging, and the included angle between the screen surface of the screen plate component included in the first screen plate group and the horizontal plane is not less than the included angle between the screen surface of the screen plate component included in the second screen plate group and the horizontal plane. By keeping the screen surfaces of the screen plate components inside the first screen plate group and the second screen plate group parallel respectively, and arranging the first screen plate group at the feeding end and the inclination angle of the screen surface thereof not less than the inclination angle of the screen surface of the second screen plate group at the discharging end, the effect of using a steeper inclination angle for the feeding section to accelerate the dispersion of the material and using a gentler inclination angle for the discharging section to prolong the screening time and reduce the material transportation speed is achieved, and the reasonable distribution of the material flow rate on the screen surface is realized, and the processing efficiency and the screening accuracy are taken into account.

[0009] Preferably, the screen surface of the screen plate component is arranged to intersect with the horizontal plane at an included angle of 0-60 degrees, the screen plate component comprises a support member and an array of rod members arranged on the support member, a gap for material falling is arranged between two adjacent rod members, and a connecting member is further arranged between the rod member and the support member. By limiting the included angle between the screen surface of the screen plate component and the horizontal plane to 0-60 degrees, and specifically designing the screen plate component to be composed of the support member, the array of rod members and the connecting member, the effective screening inclination angle range is provided and the structure of the screen surface is ensured to be stable, the smooth flow and efficient screening of the material are realized, and the mechanical strength and service life of the whole screen surface are ensured.

[0010] Preferably, the vibrating screen with adjustable screen inclination angle also includes a material detection component, which is a dry / wet detection module. The dry / wet detection module is used to detect the dry / wet state of the material. When the material is relatively dry, the angle between the screen surface of the screen plate component and the horizontal plane should be smaller than the angle between the screen surface of the screen plate component and the horizontal plane when the material is relatively wet. By setting a material detection component including a dry / wet detection module and adjusting the inclination angle of the screen plate component according to the dry / wet state of the material, the screen automatically adapts to changes in the moisture content of the material, effectively preventing wet material from adhering and clogging the screen holes, and ensuring stable operation of the screening operation under different humidity conditions.

[0011] Preferably, the vibrating screen with adjustable screen inclination angle also includes a material detection component, which is a density detection module. The density detection module is used to detect the density of the material. When the material is heavier, the angle between the screen surface of the screen plate component and the horizontal plane should be smaller than the angle between the screen surface of the screen plate component and the horizontal plane when the material is lighter. By setting a material detection component including a density detection module and adjusting the inclination angle of the screen plate component according to the material density feedback, the screen automatically adapts to changes in material density, realizes differentiated processing of light and heavy materials, optimizes their projection intensity and stratified screening behavior, and improves screening efficiency and accuracy.

[0012] Preferably, the frame is provided with an elastic element, and the frame is inclinedly mounted on the machine frame via the elastic element. The frame is provided with baffles at both ends along the length of the screen plate component. The baffles are used to reduce the impact damage of materials on the frame. By setting the elastic element on the frame so that it is inclinedly mounted on the machine frame, and setting baffles at both ends of the screen plate component, the vibration impact is buffered, the operating noise is reduced, and the direct impact of materials on the frame is blocked. This achieves the effect of enhancing the stability of system operation and reducing equipment wear and maintenance requirements.

[0013] Preferably, the composite screen body is also equipped with a mesh screen, which is located at the bottom of the bar screen and the screen surface of the mesh screen is arranged at an angle to the horizontal plane. The mesh screen is used to further screen the undersize material after the bar screen. The materials screened by the mesh screen and the bar screen are respectively transported by conveyor belts to different downstream processing units for processing. By setting the mesh screen at the bottom of the bar screen at an angle to the horizontal plane, a secondary fine screening effect is achieved on the undersize material of the bar screen, realizing multi-level classification of materials, enabling the effective separation and separate collection of products of different particle sizes, and improving the purity and value of the final product.

[0014] Preferably, the vibrating screen with adjustable screen angle also includes a conveying mechanism located at the bottom of the composite screen body. The conveying mechanism is used to convey the undersize material after the screen is screened by the mesh screen. The conveying direction of the conveying mechanism is opposite to the conveying direction of the mesh screen and / or the bar screen. By setting the conveying mechanism at the bottom of the composite screen body and making its conveying direction opposite to that of the mesh screen and / or the bar screen, the undersize material of the mesh screen is conveyed in reverse, realizing the separation and collection of the oversize material and the undersize material in space, simplifying the subsequent material processing flow, and optimizing the overall layout and material transfer efficiency.

[0015] A waste treatment system employing an adjustable-angle vibrating screen includes the adjustable-angle vibrating screen, two drum screening devices, and two air separation devices; the waste treatment system's processing steps include: S1, using an excavator to transfer the pre-treated raw waste material to a plate feeder, the plate feeder transferring the raw waste material fed by the excavator to a first screen with adjustable inclination angle vibrating screen for screening to obtain a first layer of oversize material, a second layer of undersize material and a second layer of oversize material. S2, the material on the second screen is transferred to a magnetic separator for magnetic separation. The magnetic separator processes the material on the second screen to obtain recyclable metal and the first material. S3, the first material is transferred to the second screen with adjustable screen angle for screening to obtain a first layer of screen feed, a second layer of screen feed and a second layer of screen discharge; S4, the first layer of material and the second layer of material obtained from the second screen angle adjustable vibrating screen in step S3 are respectively transferred to two light material sorting machines, where the light material sorting machines separate the first combustible material and the second material. By applying the screen angle adjustable vibrating screen in the waste treatment system, a pretreatment unit with adaptive adjustment capability is effectively provided for waste materials with complex composition and variable properties. It realizes dynamic optimization of screening parameters according to the instantaneous state of the incoming waste (such as humidity, composition, and load), thereby improving the overall effect of sorting efficiency, operational stability and resource recovery quality of the entire waste treatment system.

[0016] The beneficial effects of this invention are: By adjusting the components, the first and second screen plate groups can be independently or in conjunction with the frame for tilt angle adjustment. This enables precise and coordinated control of the material distribution thickness, residence time, and flow speed in different sections of the screen surface. As a result, it achieves a comprehensive technical effect of effectively preventing screen blockage and significantly improving the equipment's throughput and screening accuracy per unit time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is one of the structural schematic diagrams of the adjustable screen tilt angle vibrating screen of the present invention; Figure 2 This is the second schematic diagram of the structure of the adjustable screen tilt vibrating screen of the present invention; Figure 3 This is a top view schematic diagram of the adjustable screen tilt angle vibrating screen of the present invention; Figure 4 This is a plan view of the sieve plate component of the present invention; Figure 5 This is a plan view of the vibrating screen with adjustable screen inclination angle according to the present invention; Figure 6 This is a schematic diagram of the structure of the adjustment component of the present invention; Figure 7 This is a partial structural schematic diagram of the adjustment component in other embodiments of the present invention; Figure 8 This is a flowchart of the novel screening process of the present invention; Figure 9 This is a flowchart of the waste treatment system of the present invention.

[0020] The reference numerals in the figures include: 1. Frame; 2. Composite screen body; 3. Drive assembly; 4. Adjustment assembly; 5. Material detection assembly; 6. Conveying mechanism; 11. Elastic component; 21. Frame; 211. Baffle; 212. Support plate; 22. Bar screen; 220. Screen plate component; 2201. Support component; 2202. Rod component; 2203. Connecting component; 221. First screen plate group; 222. Second screen plate group; 23. Mesh screen; 41. First drive component; 42. Second drive component; 43. Toothed plate; 44. Gear; 441. Worm gear; 442. First bevel gear; 443. Second bevel gear; 444. Wheel body. Detailed Implementation

[0021] Reference Figures 1 to 9 The screen surface tilt angle adjustable vibrating screen includes a frame 1, a composite screen body 2 and a drive assembly 3 for driving the composite screen body 2 to vibrate on the frame 1; the composite screen body 2 includes a frame 21 and a bar screen 22 disposed on the frame 21. The bar screen 22 includes a first screen plate group 221 and a second screen plate group 222, wherein the first screen plate group 221 and / or the second screen plate group 222 are movably arranged relative to the frame 21. The composite screen body 2 also includes an adjustment component 4 disposed on the frame 21. The adjustment component 4 is used to adjust the first screen plate group 221 and / or the second screen plate group 222 relative to the frame 21.

[0022] With the above-mentioned structural setup, during use, the first screen plate group 221 and the second screen plate group 222 can be independently or in conjunction with the frame 21 for tilt angle adjustment via the adjustment component 4. This enables precise and coordinated control of the material distribution thickness, residence time, and flow speed in different sections of the screen surface, thereby achieving a comprehensive technical effect of effectively preventing screen blockage and significantly improving the equipment's processing capacity and screening accuracy per unit time.

[0023] Specifically, the frame 1 is also equipped with a foot area and steps. The steps are used by workers to reach the foot area from the base where the vibrating composite screen is placed. The foot area is used by workers to inspect or perform operations such as spreading out the material on the composite screen body 2.

[0024] It is worth noting that although the current level of automation in waste treatment is already quite high, on-site supervision by staff is still required. When there is a lot of wet or heavy material, two staff members are needed on-site to supervise the distribution of the material transported to the vibrating screen. Normally, at least one staff member is needed on-site to supervise.

[0025] Specifically, this technical solution only describes the improved parts, and other technologies known to those skilled in the art will not be elaborated. For example, how the drive component 3 realizes the vibration of the composite screen body 2 is known to those skilled in the art.

[0026] Specifically, the vibrating composite screen also includes a central control mechanism, which is used to control and coordinate the various components.

[0027] Specifically, the adjustment component 4 can also be a hinge and pin positioning mechanism: the screen plate components 220 of the first screen plate group 221 and the second screen plate group 222 are mounted on the frame 21. The adjustment component 4 is a set of positioning holes on the screen plate components 220 and a corresponding pin. The pin is slidably mounted on the frame 1. The pin is inclined relative to the frame 1 to prevent it from falling off the positioning holes on the screen plate components 220 due to vibration or gravity. By pulling out the pin, adjusting the screen plate components 220 to the required angle, and then inserting the pin to fix it, a low-cost and reliable angle adjustment and locking function is achieved.

[0028] Specifically, the first screen plate group 221 and the second screen plate group 222 are each composed of several independent screen plate components 220. The adjustment component 4 includes a first drive member 41 and a second drive member 42. The first drive member 41 is used to adjust the angle of the several screen plates included in the first screen plate group 221, and the second drive member 42 is used to adjust the angle of the several screen plates included in the second screen plate group 222. By setting the first screen plate group 221 and the second screen plate group 222 to be composed of several independent screen plate components 220, and configuring the first drive member 41 and the second drive member 42 for adjusting them respectively, the function of independent and precise angle control of the first screen plate group 221 and the second screen plate group 222 is achieved. This realizes the precise adjustment of the screen surface inclination angle according to the needs of different screening sections, thereby optimizing the material flow rate and screening effect of each section.

[0029] Specifically, the first drive unit 41 and the second drive unit 42 can be directly driven by a hydraulic / electric cylinder.

[0030] Specifically, the screen surfaces of the several screen plate components 220 included in the first screen plate group 221 are parallel, and the screen surfaces of the several screen plate components 220 included in the second screen plate group 222 are parallel. The first screen plate group 221 is located at the end of the frame 21 for feeding, and the second screen plate group 222 is located at the end of the frame 21 for discharging. The angle between the screen surface of the screen plate components 220 included in the first screen plate group 221 and the horizontal plane is not less than the angle between the screen surface of the screen plate components 220 included in the second screen plate group 222 and the horizontal plane. The included angle between the screen plates is such that the screen surfaces of the screen plate components 220 inside the first screen plate group 221 and the second screen plate group 222 are kept parallel, and the first screen plate group 221 is set at the feed end and its screen surface inclination angle is not less than that of the second screen plate group 222 at the discharge end. This results in the feeding section using a steeper inclination angle to accelerate material dispersion and the discharge section using a gentler inclination angle to extend the screening time and reduce the material transport speed. This achieves a reasonable distribution of the material flow velocity on the screen surface, taking into account both processing efficiency and screening accuracy.

[0031] Specifically, the screen surface of the screen plate component 220 is arranged intersecting the horizontal plane at an angle of 0-60 degrees. The screen plate component 220 includes a support member 2201 and rod members 2202 arrayed on the support member 2201. There is a gap between two adjacent rod members 2202 for material to fall. A connecting member 2203 is also provided between the rod member 2202 and the support member 2201. By limiting the angle between the screen surface of the screen plate component 220 and the horizontal plane to 0-60 degrees, and specifically designing the screen plate component 220 to consist of the support member 2201, the arrayed rod members 2202 and the connecting member 2203, an effective screening angle range is provided and the screen surface structure is ensured to be stable. This achieves smooth material flow and efficient screening, while ensuring the overall mechanical strength and service life of the screen surface.

[0032] Specifically, in this embodiment, the rod 2202 is fixed to the support 2201 by welding. In other embodiments, it can also be screwed onto the support 2201. The diameter of the end of the rod 2202 near the support 2201 is larger than the diameter of the end of the rod 2202 away from the support 2201.

[0033] Specifically, the connector 2203 may be a plate or a nut, and is intended to enhance the mechanical strength between the support 2201 and its rod 2202.

[0034] Specifically, the adjustable screen tilt vibrating screen also includes a material detection component 5, which includes a dryness / wetness detection module. The dryness / wetness detection module is used to detect the dryness / wetness of the material. When the material is relatively dry, the angle between the screen surface of the screen plate component 220 and the horizontal plane should be smaller than the angle between the screen surface of the screen plate component 220 and the horizontal plane when the material is relatively wet. By setting the material detection component 5, which includes a dryness / wetness detection module, and adjusting the tilt angle of the screen plate component 220 according to the feedback of the dryness / wetness of the material, the screen automatically adapts to changes in the moisture content of the material, effectively preventing wet material from adhering and clogging the screen holes, and ensuring stable operation of the screening operation under different humidity conditions.

[0035] Specifically, the adjustable screen angle vibrating screen also includes a material detection component 5, which includes a density detection module. The density detection module is used to detect the density of the material. When the material is heavier, the angle between the screen surface of the screen plate component 220 and the horizontal plane should be smaller than the angle between the screen surface of the screen plate component 220 and the horizontal plane when the material is lighter. By setting the material detection component 5, which includes a density detection module, and adjusting the tilt angle of the screen plate component 220 according to the material density feedback, the screen automatically adapts to changes in material density, realizes differentiated processing of light and heavy materials, optimizes their projection intensity and stratified screening behavior, and improves screening efficiency and accuracy.

[0036] Specifically, in this embodiment, the adjustment of the sieve plate component 220 angle is not limited to automatic or manual adjustment.

[0037] Specifically, the distance between the screen plate component 220 near the feed end and the frame 1 is not less than the distance between the screen plate component 220 far from the feed end and the frame 1.

[0038] Specifically, the adjustment component 4 also includes a gear 44 disposed on the support member 2201 and a toothed plate 43 slidably disposed on the frame 21. The toothed plate 43 is meshed with the gear 44. The first driving member 41 and the second driving member 42 are respectively used for the corresponding toothed plate 43 to slide relative to the frame 21. The first driving member 41 and the second driving member 42 can be screws that are rotatably disposed on the frame 21 and screwed to the toothed plate 43.

[0039] Specifically, a worm gear 441 meshing with the gear 44 can also be provided. The gear 44 is a worm wheel. The worm gear 441 is rotatably mounted on the frame 21 and has a first bevel gear 442 at its end. The first bevel gear 442 is meshed with a second bevel gear 443. The second bevel gear 443 is rotatably mounted on the frame 21. The second bevel gear 443 is also fixedly connected to a wheel body 444 meshing with a toothed plate 43. The toothed plate 43 can move to drive the wheel body 444 to rotate, thereby realizing the angle adjustment of the screen plate component 220.

[0040] Specifically, the frame 21 is provided with an elastic element 11, and the frame 21 is inclinedly mounted on the frame 1 via the elastic element 11. The frame 21 is provided with baffles 211 at both ends along the length of the screen plate component 220. The baffles 211 are used to reduce the impact damage of materials on the frame 21. By providing the elastic element 11 on the frame 21 so that it is inclinedly mounted on the frame 1, and by providing baffles 211 at both ends of the screen plate component 220, the effects of buffering vibration impact, reducing operating noise, and blocking materials from directly impacting the frame 21 are achieved, thereby enhancing the stability of system operation and reducing equipment wear and maintenance requirements.

[0041] Specifically, the baffle 211 is arc-shaped, and the frame 21 is also equipped with a nozzle. The nozzle is used to blow air from the top of the baffle 211 to the bottom to form a Coanda effect and reduce dust dispersion.

[0042] Specifically, the composite screen body 2 is also equipped with a mesh screen 23. The mesh screen 23 is located at the bottom of the bar screen 22 and the screen surface of the mesh screen 23 is arranged at an angle to the horizontal plane. The mesh screen 23 is used to further screen the undersize material after the bar screen 22. The materials screened by the mesh screen 23 and the bar screen 22 are respectively transported by conveyor belts to different downstream processing units for processing. By setting the mesh screen 23 at the bottom of the bar screen 22 at an angle to the horizontal plane, a secondary fine screening effect is achieved on the undersize material of the bar screen 22, realizing multi-level classification of materials, enabling the effective separation and separate collection of products of different particle sizes, and improving the purity and value of the final product.

[0043] Specifically, the material of screen 23 is polyurethane mesh.

[0044] Specifically, the adjustable screen angle vibrating screen also includes a conveying mechanism 6, which is located at the bottom of the composite screen body 2. The conveying mechanism 6 is used to convey the undersize material after the screen 23. The conveying direction of the conveying mechanism 6 is opposite to the conveying direction of the screen 23 and / or the bar screen 22. By setting the conveying mechanism 6 at the bottom of the composite screen body 2 and making its conveying direction opposite to that of the screen 23 and / or the bar screen 22, the undersize material of the screen 23 is conveyed in reverse, realizing the separation and collection of the oversize material and the undersize material in space, simplifying the subsequent material processing flow, and optimizing the overall layout and material transfer efficiency.

[0045] Specifically, the material transported via conveyor 6 is humus.

[0046] Specifically, the frame 21 is provided with a detachable support plate 212 at its end along the length direction. The support plate 212 is composed of a rigid plate or several rigid strips. The height and angle of the support plate 212 relative to the frame 21 are adjustable. The support plate 212 is used to reduce the direct impact damage of materials on the frame 21. By adding the support plate 212 at the end of the frame 21, the end structure of the frame 21 is further strengthened to resist the impact of materials, thereby achieving more effective dispersion of impact force, reducing the risk of deformation or damage to the frame 21, and improving the reliability of the equipment.

[0047] A waste treatment system employing an adjustable screen angle vibrating screen, including the adjustable screen angle vibrating screen, effectively provides a pre-treatment unit with adaptive adjustment capabilities for waste materials with complex composition and variable properties. It realizes dynamic optimization of screening parameters based on the instantaneous state of the incoming waste (such as humidity, composition, and load), thereby improving the overall sorting efficiency, operational stability, and resource recovery quality of the entire waste treatment system.

[0048] Specifically, the waste treatment system using an adjustable screen angle vibrating screen also includes two drum screening devices and two air separation devices; the waste treatment system processing steps include: S1, using an excavator to transfer the pre-treated raw waste material to a plate feeder, the plate feeder transferring the raw waste material fed by the excavator to a first screen with adjustable inclination angle vibrating screen for screening to obtain a first layer of oversize material, a second layer of undersize material and a second layer of oversize material. S2, the material on the second screen is transferred to a magnetic separator for magnetic separation. The magnetic separator processes the material on the second screen to obtain recyclable metal and the first material. S3, the first material is transferred to the second screen with adjustable screen angle for screening to obtain a first layer of screen feed, a second layer of screen feed and a second layer of screen discharge; S4, the first layer of material and the second layer of material obtained from the second screen tilt adjustable vibrating screen in step S3 are respectively transferred to two light material sorting machines, and the first combustible material and the second material are separated by the light material sorting machines.

[0049] In this embodiment, two adjustable screen angle vibrating screens and two air separation devices are used.

[0050] In the second embodiment, the waste treatment system using a vibrating screen with an adjustable screen angle also includes two drum screening devices and two air separation devices.

[0051] 1. In this embodiment: the vibration amplitude of the vibrating screen was modified (5-7mm → 7-10mm) + the angle of the vibrating screen bars was optimized to be adjustable + the bar structure was optimized (welded fixed type → cast assembly type) + the screen mesh of the vibrating screen was optimized (manganese steel woven mesh → polyurethane mesh) + the filter structure of the fan return air inlet was optimized (L-plate backflow + independent filter screen plate → integrated filter cover) + the angle of the air selector nozzle was optimized (fixed type → adjustable angle), and the production capacity was increased to 130m³ / h.

[0052] 2. In the second embodiment: By modifying the diameter of the drum screen (θmin=20mm→θmin=25mm) and the installation angle of the blower (18°→0°), the production capacity is increased to 100m³ / h. (Note: This is done based on the principle of reusing existing equipment, without significantly increasing costs.) Comparative verification shows that the two new processes are significantly superior to the traditional process in key indicators, as detailed below: Indicator Conventional process Second embodiment system The present embodiment system Upper limit of water content 15% 20% 20% Daily average capacity 40 m3 / h 70 m3 / h 130 m3 / h Capacity improvement rate / 175% 325% Impurity rate of aggregate ≤1% ≤1% ≤1% Impurity rate of light substance ≤15% ≤15% ≤15% Functional descriptions of each piece of equipment in a waste treatment system using a vibrating screen with adjustable screen inclination angle: Plate feeder: Through the cooperation of drive device and sprocket, chain and chain plate, the metal chain plate is used as the carrier to carry the material and convey it in a horizontal or inclined direction. By controlling the transmission speed of the chain plate machine and cooperating with the material leveler, the feeding of the entire screening system can be quantitatively controlled.

[0053] The first-stage vibrating composite screen (the first screen surface inclination angle adjustable vibrating screen): Under the action of the vibrating motor, the screen box vibrates, causing the material to be thrown and moved downwards on the screen bars, loosening the material. Through the gaps between the screen bars, large pieces of construction waste and other large waste in the raw material are initially separated, thereby controlling the size of the waste entering the next screening equipment. This reduces the operating load of the screening equipment, improves the overall screening efficiency, reduces the equipment failure rate, and extends the service life of the screening equipment.

[0054] Magnetic separator: It removes ferrous metals from materials by using electromagnetic principles in conjunction with a conveyor belt, preventing them from entering the next process and causing jamming or damage to the equipment.

[0055] Two-stage vibrating composite screen (second screen with adjustable inclination angle): The vibrator is driven by a motor. Under the centrifugal inertial force of the vibrator, the screen box vibrates, causing the material to be thrown and moved downward on the screen surface, making the material loose. After being screened by a first layer of bar screen and a second layer of screen, the material is sorted out in one go, separating humus (for direct backfill), medium aggregate (for direct backfill), and large light materials (for direct transport). The material on the second layer of screen after the reduction enters the next sorting process.

[0056] Light material sorting machine: The drive unit drives the sorting belt to separate medium-sized light materials from the material on the second screen, further reducing the volume and reducing the sorting load of the next process.

[0057] Air separator: It uses the principles of aerodynamics and air as the sorting medium. Under the combined action of controllable positive and negative pressure airflow, it separates light and small materials from heavy materials of different densities and particle sizes.

[0058] The working principle of a waste treatment system using a vibrating screen with adjustable screen inclination angle is as follows: 1. Uniform feeding and pretreatment Plate feeder: It is responsible for receiving garbage from the loader and conveying it at a constant speed and in a fixed quantity through its sturdy chain plate, laying the foundation for the stable and efficient operation of all subsequent equipment.

[0059] 2. Primary screening and iron removal Vibrating bar screen: It performs coarse screening of materials, uses vibration to disperse the materials, and separates out oversized waste (such as large stones and wood) larger than 200mm, which is then discarded directly, effectively protecting subsequent precision equipment from being blocked or damaged.

[0060] Magnetic separator: Utilizing the principle of magnetic adsorption, it automatically removes ferrous metals (such as iron cans and steel bars) from materials for recycling. This not only recovers resources but also prevents ferrous parts from damaging subsequent equipment.

[0061] Manual sorting: After magnetic separation, workers pick out large, lightweight materials (such as plastic bottles and woven bags) that could not be removed by magnetic separation from materials that are 80-200mm in size, further reducing the workload for subsequent processes.

[0062] 3. Core fine screening Vibrating composite screen: Receives pre-treated (removal of large items and ironware) 80-200mm materials and completes three-stage sorting in one pass. First-stage screening (bar screen): The remaining larger light materials (such as large plastics and paper) and their large aggregates are screened out and manually sorted as combustible materials or brick and stone materials.

[0063] Two-layer screening (mesh screen): fine particles smaller than 30mm (mainly humus and ash soil) are screened out and directly backfilled as humus, realizing the on-site disposal and reduction of a large amount of material.

[0064] The material over the second sieve: relatively pure heavy materials such as bricks and concrete blocks of 30-80mm are obtained and sent to the light material sorting machine to screen out combustible materials in one step.

[0065] Re-screening: The material that has been screened once by the material sorting machine is fed into the air classifier to screen out the combustible material.

[0066] The air separator uses wind power to completely separate substances of different weights in the remaining material. The lighter ones (plastics, paper) are recycled as combustibles, while the heavier ones (small bricks) are used as brick and stone materials.

[0067] The above descriptions provide one or more embodiments in conjunction with specific details, but do not imply that the specific implementation of the present invention is limited to these descriptions. Any methods or structures that are similar to or identical to those of the present invention, or any technical deductions or substitutions made based on the concept of the present invention, should be considered within the scope of protection of the present invention.

Claims

1. A vibrating screen with adjustable screen inclination angle, comprising a frame (1), on which a composite screen body (2) and a drive assembly (3) for driving the vibration of the composite screen body (2) are provided; characterized in that: The composite screen body (2) includes a frame (21) and a bar screen (22) disposed on the frame (21). The bar screen (22) includes a first screen plate group (221) and a second screen plate group (222), the first screen plate group (221) and / or the second screen plate group (222) being movably arranged relative to the frame (21); The composite screen body (2) also includes an adjustment component (4) provided on the frame (21), the adjustment component (4) being adjustable relative to the frame (21) for the first screen plate group (221) and / or the second screen plate group (222).

2. The vibrating screen with adjustable screen surface inclination angle according to claim 1, characterized in that: The first sieve plate group (221) and the second sieve plate group (222) are each composed of several independent sieve plate components (220). The adjustment component (4) includes a first drive member (41) and a second drive member (42). The first drive member (41) is used to adjust the angle of the several sieve plate components (220) included in the first sieve plate group (221), and the second drive member (42) is used to adjust the angle of the several sieve plate components (220) included in the second sieve plate group (222).

3. The adjustable screen inclination angle vibrating screen according to claim 2, characterized in that: The screen surfaces of the several screen plate components (220) included in the first screen plate group (221) are parallel, and the screen surfaces of the several screen plate components (220) included in the second screen plate group (222) are parallel. The first screen plate group (221) is located on the frame (21) at the end for feeding, and the second screen plate group (222) is located on the frame (21) at the end for discharging. The angle between the screen surface of the screen plate component (220) included in the first screen plate group (221) and the horizontal plane is not less than the angle between the screen surface of the screen plate component (220) included in the second screen plate group (222) and the horizontal plane.

4. The vibrating screen with adjustable screen surface inclination angle according to claim 2, characterized in that: The screen surface of the screen plate component (220) is arranged at an angle of 0-60 degrees to the horizontal plane. The screen plate component (220) includes a support (2201) and rods (2202) arranged in an array on the support (2201). There is a gap between two adjacent rods (2202) for material to fall.

5. The adjustable screen inclination vibrating screen according to claim 2, characterized in that: The adjustable screen angle vibrating screen also includes a material detection component (5). The material detection component (5) is a dry and wet detection module. The dry and wet detection module is used to detect the dry and wet state of the material. When the material is relatively dry, the angle between the screen surface of the screen plate component (220) and the horizontal plane should be smaller than the angle between the screen surface of the screen plate component (220) and the horizontal plane when the material is relatively wet.

6. The vibrating screen with adjustable screen surface inclination angle according to claim 2, characterized in that: The adjustable screen angle vibrating screen also includes a material detection component (5), which is a density detection module. The density detection module is used to detect the density of the material. When the material is heavier, the angle between the screen surface of the screen plate component (220) and the horizontal plane should be smaller than the angle between the screen surface of the screen plate component (220) and the horizontal plane when the material is lighter.

7. The vibrating screen with adjustable screen inclination angle according to claim 2, characterized in that: The frame (21) is provided with an elastic element (11). The frame (21) is inclined on the frame (1) via the elastic element (11). The frame (21) is provided with baffles (211) at both ends in the length direction of the screen plate component (220). The baffles (211) are used to reduce the impact damage of the material on the frame (21).

8. The vibrating screen with adjustable screen surface inclination angle according to any one of claims 1-7, characterized in that: The composite screen body (2) is also equipped with a screen (23). The screen (23) is located at the bottom of the bar screen (22) and the screen surface of the screen (23) is intersected with the horizontal plane. The screen (23) is used to screen the undersize material after the bar screen (22). The materials screened by the screen (23) and the bar screen (22) are respectively transported to different downstream processing units for processing via conveyor belts.

9. The vibrating screen with adjustable screen surface inclination angle according to claim 8, characterized in that: The adjustable screen angle vibrating screen also includes a conveying mechanism (6), which is located at the bottom of the composite screen body (2). The conveying mechanism (6) is used to convey the undersize material after the screen (23). The conveying direction of the conveying mechanism (6) is opposite to the conveying direction of the screen (23) and / or the bar screen (22).

10. A waste treatment system using a vibrating screen with an adjustable screen inclination angle, characterized in that: The vibrating screen with adjustable screen inclination angle as described in any one of claims 1-9 further includes two drum screening devices and two air separation devices; the waste treatment system processing steps include: S1, using an excavator to transfer the pre-treated raw waste material to a plate feeder, the plate feeder transferring the raw waste material fed by the excavator to a first screen with adjustable inclination angle vibrating screen for screening to obtain a first layer of oversize material, a second layer of undersize material and a second layer of oversize material. S2, the material on the second screen is transferred to a magnetic separator for magnetic separation. The magnetic separator processes the material on the second screen to obtain recyclable metal and the first material. S3, the first material is transferred to the second screen with adjustable screen angle for screening to obtain a first layer of screen feed, a second layer of screen feed and a second layer of screen discharge; S4, the first layer of material and the second layer of material obtained from the second screen tilt adjustable vibrating screen in step S3 are respectively transferred to two light material sorting machines, and the first combustible material and the second material are separated by the light material sorting machines.

Images