High-efficiency screening device for stale garbage

Abstract

The utility model discloses a kind of stale garbage high-efficiency screening devices, belong to garbage screening technical field, and the present stale garbage high-efficiency screening device is by the shaftless roller structure of inclination arrangement, utilize gravity effect to make garbage produce from bottom to top moving trend in roller, simultaneously cooperate motor drive outer layer screen and inner layer grid screen rotation, so that garbage is subjected to multilayer screening processing in roller, improve screening efficiency and effect. The coaxial arrangement of inner layer grid screen and outer layer screen provides two screenings for garbage of different sizes, effectively separates out screen upper material and screen lower material, realizes the preliminary classification of garbage, avoids garbage to adhere on screen hole to reduce screening efficiency. Anti-blocking brush is rotatably installed between outer layer screen and barrel shell, and is in close contact with outer layer screen, in the rotation process of outer layer screen, anti-blocking brush can clean screen hole in real time, and timely remove sundries blocked in screen hole.

Description

Technical Field

[0001] This utility model relates to the field of waste screening technology, and in particular to a high-efficiency screening device for aged waste. Background Technology

[0002] Stale waste generally refers to municipal solid waste that has been in landfills or accumulated for many years, containing a large amount of fine organic matter and recyclable materials. To achieve the reclamation of landfill land resources and the harmless and resource-based treatment of stale waste, it is first necessary to screen the stale waste for subsequent comprehensive utilization. Because buried stale waste undergoes long-term physical, chemical, and biological processes, it has characteristics such as high moisture content, clumping and humification, complex composition, and low calorific value.

[0003] In order to screen old waste, existing waste screening devices use drum screens and vibrating screens to screen waste according to its size. However, existing screening devices fail to effectively deal with the problems of high moisture content and clumping of waste, which makes the screens easy to clog, resulting in low screening efficiency and incomplete screening. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a high-efficiency screening device for aged waste, which can prevent screen blockage and improve screening efficiency.

[0005] The efficient screening device for aged waste according to an embodiment of this utility model includes: a frame; a shaftless drum, which is inclinedly arranged on the frame and is hollow cylindrical. The shaftless drum has a feed inlet at its higher end along the axial direction and a screen outlet at its lower end along the axial direction. The shaftless drum includes a coaxially arranged outer shell, an outer screen, and an inner grid screen, which are rotatably arranged inside the outer shell. A screen outlet is provided at the lower end of the outer shell; a motor, which is mounted on the frame and is connected to the outer screen and inner grid screen via a transmission wheel. The motor is used to rotate the outer screen and inner grid screen; and an anti-clogging brush, which is rotatably arranged between the outer screen and the outer shell, and abuts against the outer screen.

[0006] The high-efficiency screening device for aged waste according to embodiments of this utility model has at least the following beneficial effects: Through the inclined shaftless drum structure, gravity is cleverly utilized to induce an upward movement of waste within the drum. Simultaneously, the motor drives the outer and inner mesh screens to rotate, resulting in multi-layer screening of the waste within the drum, thus improving screening efficiency and effectiveness. The coaxial arrangement of the inner and outer mesh screens provides two screening processes for waste of different sizes, effectively separating oversize and undersize materials, achieving preliminary waste classification, and preventing waste from adhering to the screen openings and reducing screening efficiency. An anti-clogging brush is rotatably installed between the outer mesh screen and the outer shell of the drum, closely abutting against the outer mesh screen. During the rotation of the outer mesh screen, the anti-clogging brush cleans the screen openings in real time, promptly removing debris clogging the openings and preventing prolonged clogging that could lead to a significant decrease in screening efficiency, thereby ensuring the continuity and high efficiency of the screening process. This device can reliably handle the screening of aged waste, providing a good material separation basis for subsequent waste treatment. It adapts to the complex needs of aged waste screening and effectively solves the problems of easy clogging and low screening efficiency of existing screening devices.

[0007] According to some embodiments of this utility model, the shaftless drum is connected to an air heater and a blower. The air blown out by the blower is heated by the air heater and then blown into the shaftless drum to dry the garbage inside the shaftless drum.

[0008] According to some embodiments of the present invention, an air heater and a blower are connected to one end of the shaftless drum near the screen outlet, and the hot air blown out by the air heater and the blower flows from one end of the shaftless drum near the screen outlet to one end of the shaftless drum near the feed inlet.

[0009] According to some embodiments of this utility model, a heat recovery device is connected to one end of the shaftless roller near the feed inlet, and the heat recovery device recovers waste heat from the hot air flowing through the shaftless roller.

[0010] According to some embodiments of the present invention, the exhaust port of the heat recovery device is connected to a waste gas dust removal device, and the gas discharged from the heat recovery device is discharged after passing through the waste gas dust removal device.

[0011] According to some embodiments of this utility model, a grid plate is provided between the shaftless roller and the air heater to prevent debris inside the shaftless roller from entering the air heater.

[0012] According to some embodiments of the present invention, the anti-clogging brush includes a brush shaft and brush bristles disposed on the brush shaft. The brush bristles are in close contact with the outer screen, and the brush shaft is movably connected to the outer shell of the cylinder through a connector.

[0013] According to some embodiments of this utility model, both the outer screen and the inner grid screen are provided with anti-corrosion coatings.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the high-efficiency screening device for aged waste according to an embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Cross-sectional view of the shaftless roller.

[0018] Figure label:

[0019] Frame 100; Electric motor 110; Drive wheel 111; Air heater 120; Blower 130; Heat recovery device 140; Exhaust gas dust removal device 150;

[0020] Shaftless drum 200; feed inlet 210; screen material outlet 220; outer shell 230; outer screen 240; inner grid screen 250; screen material outlet 260; anti-clogging brush 270; brush shaft 271; brush bristles 272. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] refer to Figures 1 to 2This invention describes a high-efficiency screening device for aged waste according to an embodiment of the present invention.

[0025] like Figures 1 to 2 As shown, the high-efficiency screening device for aged waste according to an embodiment of the present invention includes: a frame 100; a shaftless drum 200, which is inclinedly arranged on the frame 100 and is a hollow cylinder. The shaftless drum 200 has a feed inlet 210 connected to its higher end along the axial direction and a screen outlet 220 connected to its lower end along the axial direction. The shaftless drum 200 includes a coaxially arranged outer shell 230, an outer screen 240, and an inner grid screen 250. A screen 250 is rotatably mounted inside a cylindrical shell 230, and a screen discharge outlet 260 is provided at the lower end of the cylindrical shell 230; a motor 110 is mounted on a frame 100, and the motor 110 is connected to the outer screen 240 and the inner grid screen 250 through a transmission wheel 111, and the motor 110 is used to rotate the outer screen 240 and the inner grid screen 250; an anti-clogging brush 270 is rotatably mounted between the outer screen 240 and the cylindrical shell 230, and the anti-clogging brush 270 abuts against the outer screen 240.

[0026] like Figures 1 to 2 As shown, the shaftless drum 200 is inclinedly mounted on the frame 100, with its left end higher than its right end. The left end of the shaftless drum 200 is connected to a feed inlet 210. The aged waste to be screened enters the shaftless drum 200 through the feed inlet 210. The shaftless drum 200 includes a cylindrical outer shell 230 fixed to the frame 100. A rotatable outer screen 240 and an inner grid screen 250 are coaxially arranged inside the cylindrical outer shell 230. The outer screen 240 and the inner grid screen 250 are connected to a motor 110, which drives them to rotate. The gaps in the middle screen are relatively large, while the gaps in the outer screen 240 are relatively small. Waste enters through the inlet 210 and flows into the inner side of the inner screen 250, moving to the right along the inner screen 250. During this movement, it is screened by both the inner screen 250 and the outer screen 240. Larger pieces of waste fall out through the upper screening outlet 220 at the lower right end of the shaftless drum 200, while smaller pieces fall out through the lower screening outlet 260 at the bottom of the shaftless drum 200. By setting up a two-layer screening structure of the inner screen 250 and the outer screen 240, waste is prevented from sticking to the screen openings, thus reducing screening efficiency. An anti-clogging brush 270 is provided on the outer side of the outer screen 240. The anti-clogging brush 270 abuts against the outer screen 240. The rotation of the outer screen 240 will drive the anti-clogging brush 270 to rotate. The anti-clogging brush 270 is used to clean the screen holes of the outer screen 240 to prevent debris from clogging the screen holes and reducing the screening effect.

[0027] The inclined shaftless drum 200 cleverly utilizes gravity to create an upward movement of waste within the drum. Simultaneously, the motor 110 drives the outer screen 240 and inner grid screen 250 to rotate, resulting in multi-layered screening of the waste and improved screening efficiency and effectiveness. The coaxial arrangement of the inner grid screen 250 and outer screen 240 provides two screening stages for waste of different sizes, effectively separating oversize and undersize materials, achieving preliminary waste classification, and preventing waste from sticking to the screen openings and reducing screening efficiency. The anti-clogging brush 270 is crucial; it is rotatably installed between the outer screen 240 and the drum shell 230, closely abutting against the outer screen 240. During the rotation of the outer screen 240, the anti-clogging brush 270 continuously cleans the screen openings, promptly removing debris that clogs the openings and preventing prolonged clogging that could significantly reduce screening efficiency, thus ensuring the continuity and high efficiency of the screening process. This device can reliably handle the screening of aged waste, providing a good material separation basis for subsequent waste treatment. It adapts to the complex needs of aged waste screening and effectively solves the problems of easy clogging and low screening efficiency of existing screening devices.

[0028] like Figure 1 As shown, the shaftless drum 200 is connected to an air heater 120 and a blower 130. Air blown by the blower 130 is heated by the air heater 120 and then blown into the shaftless drum 200 to dry the waste inside. This connection design between the air heater 120 and the blower 130 and the shaftless drum 200 provides a significant drying advantage for screening aged waste. Because aged waste often has a high moisture content, it easily leads to screen clogging, affecting screening efficiency. By sending air to the air heater 120 via the blower 130 and then blowing it into the shaftless drum 200, the hot air creates a good drying environment inside the drum, effectively drying the waste and reducing its moisture content. The reduced moisture content weakens the adhesion between waste particles, reducing the adhesion between waste and the screen, thereby further reducing the possibility of screen clogging and improving the smoothness and thoroughness of screening. Dried waste is more conducive to subsequent crushing, sorting and other processing steps, improving the efficiency and effectiveness of the entire aged waste treatment system. It enhances the applicability and advantages of this screening device in the aged waste treatment process, enabling it to better meet the actual waste treatment needs and improve the pre-treatment quality of waste resource utilization.

[0029] like Figure 1As shown, the air heater 120 and the blower 130 are connected to the end of the shaftless drum 200 near the screen outlet 220. The hot air blown by the air heater 120 and the blower 130 flows from the end of the shaftless drum 200 near the screen outlet 220 to the end of the shaftless drum 200 near the feed inlet 210. The hot air moves in the opposite direction to the waste, forming counter-current drying, which prolongs the drying time of the waste, improves drying efficiency, ensures that the waste is well dried before entering the screening area, further reduces the moisture content, and reduces clogging problems caused by moisture during the screening process. It avoids local heat concentration or underutilization, improves energy utilization efficiency, reduces energy consumption during the drying process, and makes the drying effect more uniform in all areas of the drum. This is conducive to improving the stable operation and screening quality of the entire screening device, and is of great significance for improving the reliability and economy of screening aged waste.

[0030] like Figure 1 As shown, a heat recovery device 140 is connected to one end of the shaftless drum 200 near the feed inlet 210. The heat recovery device 140 recovers waste heat from the hot air flowing through the shaftless drum 200, bringing significant energy utilization benefits to the entire screening device. During the waste screening and drying process, the hot air carries a large amount of waste heat after passing through the shaftless drum 200; direct discharge would result in energy waste. The heat recovery device 140 can effectively recover waste heat and convert it into usable heat energy or electrical energy, such as for heating domestic water, achieving energy recycling and reducing operating energy consumption costs. At the same time, heat recovery helps stabilize the hot air temperature supply of the drying system, reduces the impact of temperature fluctuations on the screening and drying effect, improves the stability and reliability of the screening process, further enhances the energy-saving effect and environmental performance of the device, making this screening device more competitive and practical in the field of aged waste treatment, and meeting the requirements of energy conservation and emission reduction.

[0031] like Figure 1 As shown, the exhaust port of the heat recovery device 140 is connected to a waste gas dust removal device 150. The gas discharged from the heat recovery device 140 is then discharged after passing through the waste gas dust removal device 150. The waste gas after heat recovery may contain pollutants such as dust and particulate matter. Direct discharge of these pollutants would pollute the environment and affect air quality. The waste gas dust removal device 150 can effectively purify the gas, removing most of the harmful particulate matter and dust, ensuring that the gas meets environmental emission standards before being discharged, reducing environmental pollution, and ensuring that the entire process of screening and processing aged waste complies with environmental protection requirements. At the same time, the exhaust gas discharged after dust removal helps improve the working environment around the device, protects the health of operators, enhances the social recognition and market competitiveness of the device, and enables the screening device to meet the needs of strict environmental protection policies and sustainable development while fulfilling its waste treatment function.

[0032] In some specific embodiments of this utility model, a grid plate is provided between the shaftless drum 200 and the air heater 120. The grid plate prevents waste from entering the air heater 120 from the shaftless drum 200. This effectively solves the problem of waste entering the air heater 120. When waste is tumbling and screening inside the shaftless drum 200, some smaller particles or debris may be carried by the airflow towards the air heater 120. If waste enters the heater, it will affect its normal operation, reduce the temperature and quality of the hot air, and even cause blockages or damage, increasing maintenance costs and the risk of failure. The size of the grid plate's pores can be designed according to actual conditions to effectively block waste from entering the air heater 120, ensuring its stable operation, extending its service life, ensuring a continuous and reliable supply of hot air, maintaining the efficient and stable operation of the entire screening device, and preventing the screening process from being affected by a malfunction of the air heater 120, thus ensuring the continuity and efficiency of the screening and processing of aged waste.

[0033] like Figure 2 As shown, the anti-clogging brush 270 includes a brush shaft 271 and brush bristles 272 mounted on the brush shaft 271. The brush bristles 272 are in close contact with the outer screen 240. The brush shaft 271 is movably connected to the outer shell 230 of the cylinder via a connector. The close contact between the brush bristles 272 and the outer screen 240 allows for thorough cleaning of the screen surface during the rotation of the shaftless drum 200, promptly removing debris and waste around the screen openings, keeping the screen openings clear, and improving screening efficiency and quality. The movable connection between the brush shaft 271 and the outer shell 230 via the connector allows for flexible adjustment of the contact angle and pressure between the brush bristles 272 and the screen according to the screen rotation and waste movement. This ensures effective cleaning while preventing excessive wear or breakage of the brush bristles 272 due to a fixed connection, extending the service life of the anti-clogging brush 270 and reducing equipment maintenance and replacement costs. The simple and reasonable structure is easy to manufacture and install, effectively performing its anti-clogging function, improving the reliability and practicality of the screening device, ensuring efficient and stable screening, and providing a strong guarantee for the smooth screening of aged waste.

[0034] In some specific embodiments of this utility model, both the outer screen 240 and the inner grid screen 250 are provided with anti-corrosion coatings. Aged waste is acidic or alkaline, has high humidity, and may contain corrosive substances. Long-term contact can corrode the metal screens and grid screens, causing deformation, enlargement, or damage to the screen holes, affecting screening accuracy and efficiency, and shortening the equipment's service life. The anti-corrosion coating effectively isolates corrosive substances in the waste from contact with the screen and grid screen substrate, reducing the risk of corrosion, improving corrosion resistance and durability, and ensuring stable screening performance during long-term operation. Simultaneously, a good anti-corrosion coating can also reduce the surface roughness of the screens and grid screens, making it easier for waste to slide and pass through the screen holes, further improving screening efficiency, reducing maintenance costs, enhancing the adaptability and reliability of the screening device in harsh waste treatment environments, and extending its service life, thus having significant practical application value.

[0035] In summary, this high-efficiency screening device for aged waste uses a blower 130 to blow air to the left. The air blown out by the blower 130 is heated by the air heater 120 and flows from right to left through the shaftless drum 200, drying the aged waste inside the drum. This reduces the moisture content of the waste, further preventing screen clogging and improving screening efficiency. After drying, the exhaust gas exits from the left side of the shaftless drum 200 and enters the heat recovery device 140. The heat recovery device 140 recovers the waste heat from the exhaust gas, which can be used to heat domestic water. The exhaust gas after heat recovery flows into the exhaust gas dust removal device 150, where it is treated for dust removal and harmless disposal before being discharged.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A high-efficiency screening device for aged waste, characterized in that, include: Rack (100); A shaftless roller (200) is inclinedly mounted on the frame (100). The shaftless roller (200) is hollow cylindrical. The higher end of the shaftless roller (200) along the axial direction is connected to a feed inlet (210), and the lower end of the shaftless roller (200) along the axial direction is connected to a screen discharge outlet (220). The shaftless roller (200) includes a coaxially arranged cylindrical shell (230), an outer screen (240), and an inner grid screen (250). The outer screen (240) and the inner grid screen (250) are rotatably mounted inside the cylindrical shell (230). A screen discharge outlet (260) is opened at the lower end of the cylindrical shell (230). An electric motor (110) is mounted on the frame (100). The electric motor (110) is connected to the outer screen (240) and the inner grid screen (250) via a transmission wheel (111). The electric motor (110) is used to rotate the outer screen (240) and the inner grid screen (250). Anti-clogging brush (270), which is rotatably disposed between the outer screen (240) and the outer shell (230), and abuts against the outer screen (240).

2. The high-efficiency screening device for aged waste according to claim 1, characterized in that, The shaftless drum (200) is connected to an air heater (120) and a blower (130). The air blown out by the blower (130) is heated by the air heater (120) and then blown into the shaftless drum (200) to dry the garbage inside the shaftless drum (200).

3. The high-efficiency screening device for aged waste according to claim 2, characterized in that, The air heater (120) and the blower (130) are connected to one end of the shaftless drum (200) near the screen outlet (220). The hot air blown out by the air heater (120) and the blower (130) flows from one end of the shaftless drum (200) near the screen outlet (220) to one end of the shaftless drum (200) near the feed inlet (210).

4. The high-efficiency screening device for aged waste according to claim 3, characterized in that, The shaftless roller (200) is connected to a heat recovery device (140) at one end near the feed inlet (210), and the heat recovery device (140) recovers waste heat from the hot air flowing through the shaftless roller (200).

5. The high-efficiency screening device for aged waste according to claim 4, characterized in that, The exhaust port of the heat recovery device (140) is connected to a waste gas dust removal device (150), and the gas discharged from the heat recovery device (140) is discharged after passing through the waste gas dust removal device (150).

6. The high-efficiency screening device for aged waste according to claim 2, characterized in that, A grid plate is provided between the shaftless roller (200) and the air heater (120) to prevent garbage in the shaftless roller (200) from entering the air heater (120).

7. The high-efficiency screening device for aged waste according to claim 1, characterized in that, The anti-clogging brush (270) includes a brush shaft (271) and brush bristles (272) disposed on the brush shaft (271). The brush bristles (272) are in close contact with the outer screen (240). The brush shaft (271) is movably connected to the outer shell (230) of the cylinder through a connector.

8. The high-efficiency screening device for aged waste according to claim 1, characterized in that, Both the outer screen (240) and the inner screen (250) are provided with anti-corrosion coatings.

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