Recycling, grading and screening mechanism for household garbage incineration slag

Abstract

The utility model discloses a recycling, grading and screening mechanism for household garbage incineration slag, which relates to the technical field of household garbage incineration slag and comprises an outer barrel and a screen barrel. The screen drum is arranged in the outer drum, and the screen drum can rotate in the outer drum. The screen drum comprises a fine screen drum, a medium screen drum and a coarse screen drum; the middle screen drum is of a hollow structure, and the two ends of the middle screen drum are open ends. Each of the fine screen drum and the coarse screen drum is of a hollow structure, one end is an open end, and the other end is a closed end; the open end of the fine screen drum and the open end of the coarse screen drum are communicated with the two open ends of the middle screen drum respectively. A V-shaped slag collecting groove is formed in the lower portion of the inner wall of the outer cylinder in a penetrating mode. The number of the slag collecting grooves is three, and the three slag collecting grooves are located below the fine screen drum, the middle screen drum and the coarse screen drum correspondingly. The classification screening mechanism achieves the multi-stage screening function and has the dust removal function, and the practicability of the screening machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of municipal solid waste incineration slag technology, specifically to a grading and screening mechanism for the recycling of municipal solid waste incineration slag. Background Technology

[0002] Slag, also known as molten slag, is a melt that floats on the surface of liquid substances such as metals during pyrometallurgical processes. Its composition is mainly oxides (silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide), and it often contains sulfides and a small amount of metal.

[0003] The composition of slag is adjusted by adding appropriate amounts of flux (lime, quartz, fluorite, etc.). During the smelting process, by controlling the composition and properties of slag, gangue and oxide impurities can be smoothly separated from molten metal or sulfur, harmful impurities in the metal can be removed, non-metallic inclusions in the liquid metal can be absorbed without being directly polluted by furnace gas, and useful metal oxides can be enriched. Slag plays a decisive role in ensuring the smooth progress of smelting operations, the quality of smelting products, and the metal recovery rate. For example, there is a saying in steelmaking operations: "Only by refining good slag can you refine good steel."

[0004] Therefore, we need to screen the slag from municipal solid waste incineration plants. However, the existing screening devices are relatively simple in structure, usually using a single screen to screen the slag, which does not achieve the desired screening effect. Furthermore, the existing screening mechanisms do not have dust removal capabilities, and the screening machine generates a large amount of dust during screening, which drifts to the surrounding environment and affects it. Utility Model Content

[0005] The purpose of this utility model is to provide a grading and screening mechanism for the recycling of municipal solid waste incinerator slag. This grading and screening mechanism realizes the function of multi-stage screening and has a dust removal function, thereby improving the practicality of the screening machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a grading and screening mechanism for the recycling of municipal solid waste incinerator slag, comprising an outer cylinder and a screen cylinder; the screen cylinder is disposed inside the outer cylinder and can rotate within the outer cylinder; the screen cylinder includes a fine screen cylinder, a medium screen cylinder, and a coarse screen cylinder; the medium screen cylinder has a hollow structure with open ends at both ends; the fine screen cylinder and the coarse screen cylinder both have hollow structures with one open end and the other closed end; the open ends of the fine screen cylinder and the coarse screen cylinder are respectively connected to the two open ends of the medium screen cylinder; a V-shaped slag collection trough is provided through the lower part of the inner wall of the outer cylinder; there are three slag collection troughs, and the three slag collection troughs are respectively located below the fine screen cylinder, the medium screen cylinder, and the coarse screen cylinder; a feeding mechanism is provided on the side of the outer cylinder facing the fine screen cylinder; the feeding mechanism is used to transport the slag to be screened into the screen cylinder;

[0007] A dust collection hood is installed above the interior of the outer cylinder. There are three dust collection hoods, and the three dust collection hoods are respectively located above the fine sieve cylinder, the medium sieve cylinder, and the coarse sieve cylinder. A fan and a filter box are installed on the outer cylinder. A filter plate is installed inside the filter box. An air inlet and an air outlet communicating with the filter box are respectively provided on the upper and lower sides of the filter plate. The input end of the fan is connected to the air outlet. The dust collection hood is connected to the air inlet through a pipe.

[0008] To facilitate automatic and uniform slag conveying and enable the screen cylinder to perform rotary screening, a preferred embodiment of this utility model for a grading and screening mechanism for municipal solid waste incineration slag recycling includes a feeding mechanism comprising a feeding cylinder, a feed inlet, an auger, a drive shaft, and a motor. The feeding cylinder has a hollow structure with one open end and the other closed end. The feed inlet is located on the feeding cylinder. The open end of the feeding cylinder penetrates through the outer cylinder and extends into the interior of the fine screen cylinder, and the outer wall of the feeding cylinder is fixedly connected to the outer cylinder. The auger is located inside the feeding cylinder, and the drive shaft is located at one end of the auger. The other end of the drive shaft is fixedly connected to the inner wall of the coarse screen cylinder. Connecting rods fixedly connected to the outer circumference of the drive shaft are evenly arranged on the inner circumference surfaces of the fine screen cylinder, the medium screen cylinder, and the coarse screen cylinder. The motor is located outside the closed end of the feeding cylinder, and the output end of the motor is fixedly connected to the other end of the auger via a rotating shaft.

[0009] To improve the stability of the screen cylinder rotation, as a preferred embodiment of this utility model for a graded screening mechanism for recycling municipal solid waste incinerator slag, guide sleeves are provided on the outer walls of adjacent fine screen cylinders, medium screen cylinders, and coarse screen cylinders. A guide rail adapted to the guide sleeves is provided on the inner wall of the outer cylinder. The guide sleeves are located in the grooves of the guide rails and can rotate within the grooves of the guide rails.

[0010] To facilitate the cleaning of residual slag inside the coarse screen cylinder, as a preferred embodiment of this utility model for the recycling and grading screening mechanism of municipal solid waste incineration slag, a slag discharge port is provided below the side of the outer cylinder opposite to the feeding mechanism, and a through groove is provided below the closed end of the coarse screen cylinder, with the diameter of the slag discharge port being larger than the diameter of the through groove.

[0011] To facilitate the cleaning of dust filtered on the filter plate and improve the filtration quality, as a preferred embodiment of this utility model for a graded screening mechanism for recycling municipal solid waste incinerator slag, the filter plate consists of a support sleeve and a filter screen disposed within the support sleeve; the top of the support sleeve is provided with a U-shaped bracket with its opening facing downwards, and an impact block is disposed above the bracket; a lifting device is embedded in the top of the filter box, and the output end of the lifting device is disposed on the impact block.

[0012] To facilitate the cleaning of dust collected inside the filter box, as a preferred embodiment of this utility model for a graded screening mechanism for recycling municipal solid waste incinerator slag, the bottom of the filter box is funnel-shaped, and an ash discharge port is provided at the bottom of the filter box, with a threaded cap on the ash discharge port.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, when the motor is started, the auger rotates, which easily and evenly pushes the municipal solid waste incineration slag in the feeding cylinder into the screen cylinder; and when the auger rotates, it synchronously drives the drive shaft screen cylinder to rotate, so that the slag is rotated and screened sequentially from the fine screen cylinder to the coarse screen cylinder, realizing the function of graded screening; and through the guide sleeve, guide rail, and slag collection trough, the slag screened by each screening cylinder can be received and processed separately, preventing the screening slag from becoming disordered and improving the quality of graded screening.

[0015] 2. With this utility model, when the fan is started, suction is generated inside the dust collection hood, which makes it easy to collect the dust generated during screening, preventing the dust from flowing out of the slag collection tank and drifting to the surrounding area, thus affecting the surrounding environment. This enables the screening mechanism to achieve the function of dust removal and improves the practicality of the screening mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the filter box of this utility model;

[0018] Figure 3 This is a schematic diagram of the drive shaft and connecting rod of this utility model.

[0019] In the diagram: 1. Outer cylinder; 2. Fine screen cylinder; 3. Medium screen cylinder; 4. Coarse screen cylinder; 5. Slag collection trough; 6. Dust collection hood; 7. Fan; 8. Filter box; 9. Air inlet; 10. Air outlet; 11. Material cylinder; 12. Feed inlet; 13. Screw conveyor; 14. Drive shaft; 15. Motor; 16. Connecting rod; 17. Guide sleeve; 18. Guide rail; 19. Slag discharge port; 20. Through groove; 21. Support sleeve; 22. Filter screen; 23. Bracket; 24. Impact block; 25. Lifting device; 26. Ash discharge port; 27. Threaded cover. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0021] Please see Figures 1 to 3 A grading and screening mechanism for the recovery of municipal solid waste incinerator slag includes an outer cylinder 1 and a screen cylinder. The screen cylinder is disposed inside the outer cylinder 1 and can rotate within the outer cylinder 1. The screen cylinder includes a fine screen cylinder 2, a medium screen cylinder 3, and a coarse screen cylinder 4. The medium screen cylinder 3 has a hollow structure with open ends. The fine screen cylinder 2 and the coarse screen cylinder 4 both have hollow structures with one open end and the other closed end. The open ends of the fine screen cylinder 2 and the coarse screen cylinder 4 are respectively connected to the two open ends of the medium screen cylinder 3. A V-shaped slag collection trough 5 is provided through the lower part of the inner wall of the outer cylinder 1. There are three slag collection troughs 5, and the three slag collection troughs 5 are respectively located below the fine screen cylinder 2, the medium screen cylinder 3, and the coarse screen cylinder 4. A feeding mechanism is provided on the side of the outer cylinder 1 facing the fine screen cylinder 2. The feeding mechanism is used to transport the slag to be screened into the screen cylinder.

[0022] The feeding mechanism includes a feeding cylinder 11, a feed inlet 12, an auger 13, a drive shaft 14, and a motor 15. The feeding cylinder 11 has a hollow structure with one open end and the other closed end. The feed inlet 12 is located on the feeding cylinder 11. The open end of the feeding cylinder 11 passes through the outer cylinder 1 and extends into the interior of the fine screen cylinder 2, and the outer wall of the feeding cylinder 11 is fixedly connected to the outer cylinder 1. The auger 13 is located inside the feeding cylinder 11, and the drive shaft 14 is located at one end of the auger 13. The other end of the drive shaft 14 is fixedly connected to the inner wall of the coarse screen cylinder 4. Connecting rods 16, which are fixedly connected to the outer circumference of the drive shaft 14, are evenly arranged on the inner circumferential surfaces of the fine screen cylinder 2, the medium screen cylinder 3, and the coarse screen cylinder 4. The motor 15 is located outside the closed end of the feeding cylinder 11, and the output end of the motor 15 is fixedly connected to the other end of the auger 13 through a rotating shaft.

[0023] A dust collection hood 6 is installed at the top inside the outer cylinder 1. There are three dust collection hoods 6, and the three dust collection hoods 6 are located above the fine sieve cylinder 2, the medium sieve cylinder 3, and the coarse sieve cylinder 4, respectively. A fan 7 and a filter box 8 are installed on the outer cylinder 1. A filter plate is installed inside the filter box 8. An air inlet 9 and an air outlet 10 connected to the filter box 8 are respectively provided on the upper and lower sides of the filter plate. The input end of the fan 7 is connected to the air outlet 10. The dust collection hood 6 is connected to the air inlet 9 through a pipe.

[0024] In this embodiment: the slag to be screened enters the feeding cylinder 11 through the feed inlet 12. The motor 15 is started and the auger 13 rotates, which makes it easy to push the municipal solid waste incineration slag in the feeding cylinder 11 into the screen cylinder at a uniform speed. When the auger 13 rotates, it drives the drive shaft 14 to rotate the screen cylinder, so that the slag is rotated and screened sequentially from the fine screen cylinder 2 to the coarse screen cylinder 4, realizing the function of graded screening. The fine screen cylinder 2, the medium screen cylinder 3, and the coarse screen cylinder 4 are all equipped with corresponding slag collection troughs 5. The slag collection troughs 5 can receive and process the slag screened by each screening cylinder separately, preventing the screening slag from becoming chaotic and improving the quality of graded screening.

[0025] Simultaneously, the fan 7 is activated, and the dust collection hood 6 generates suction, which easily collects the dust generated during screening, preventing the dust from flowing out of the slag collection trough 5 and drifting to the surrounding area, thus affecting the surrounding environment. The dust is sucked into the filter box 8 and first passes through the filter plate, which reduces the amount of dust entering the fan 7, making it easier to protect the fan 7. This enables the screening mechanism to achieve the functions of screening and dust removal, improving the practicality of the screening mechanism.

[0026] As a technical optimization of this utility model, guide sleeves 17 are provided on the outer walls of adjacent fine screen cylinder 2, medium screen cylinder 3 and coarse screen cylinder 4. Guide rails 18 adapted to guide sleeves 17 are provided on the inner wall of outer cylinder 1. Guide sleeves 17 are located in the groove of guide rails 18 and can rotate in the groove of guide rails 18.

[0027] In this embodiment: when the screen cylinder rotates, the guide sleeve 17 on the outer wall is restricted by the guide rail 18, which further improves the stability of the screen cylinder rotation; and the guide rail 18 supports the screen cylinder through the guide sleeve 17. At the same time, the guide sleeve 17 and the guide rail 18 can prevent the screened slag from becoming disordered, thus improving the quality of grading and screening.

[0028] As a technical optimization of this utility model, a slag discharge port 19 is provided on the lower side of the outer cylinder 1 on the side opposite to the feeding mechanism, and a through groove 20 is provided on the lower side of the closed end of the coarse screen cylinder 4. The diameter of the slag discharge port 19 is larger than the diameter of the through groove 20.

[0029] In this embodiment: the trough 20 and the slag discharge port 19 make it easy to clean the residual municipal solid waste incineration slag in the coarse screen cylinder 4 after screening, and the slag discharge port 19 rotates synchronously with the coarse screen cylinder 4, which makes it easy to ensure the municipal solid waste incineration slag time and avoids the unscreened municipal solid waste incineration slag being thrown out directly through the trough 20.

[0030] As a technical optimization of this utility model, the filter plate is composed of a support sleeve 21 and a filter screen 22 disposed in the support sleeve 21; the top of the support sleeve 21 is provided with a U-shaped bracket 23 with the opening facing downward, and an impact block 24 is disposed above the bracket 23; a lifting device 25 is embedded in the top of the filter box 8, and the output end of the lifting device 25 is disposed on the impact block 24.

[0031] In this embodiment: the lifting device 25 is an electric telescopic rod, a pneumatic telescopic rod, or a hydraulic telescopic rod; when the lifting device 25 is activated, the impact block 24 moves up and down to impact the bracket 23. The impact force on the bracket 23 is applied to the filter plate, causing the filter plate to vibrate. This makes it easy to shake and automatically clean the dust filtered on the filter plate, preventing dust from clogging the filter plate and affecting the filtration efficiency of the filter plate.

[0032] As a technical optimization of this utility model, the bottom of the filter box 8 is funnel-shaped, and the bottom of the filter box 8 is provided with a ash discharge port 26, and a threaded cover 27 is provided on the ash discharge port 26.

[0033] In this embodiment: opening the threaded cover 27 on the ash discharge port 26 makes it easy to clean the dust powder filtered in the filter box 8.

[0034] Working principle:

[0035] First, the slag to be screened enters the feeding cylinder 11 through the feed inlet 12. The motor 15 is started, and the auger 13 rotates, easily and evenly pushing the municipal solid waste incineration slag in the feeding cylinder 11 into the screen cylinder. Simultaneously, the rotation of the auger 13 drives the drive shaft 14 to rotate the screen cylinder, causing the slag to be rotated and screened sequentially from the fine screen cylinder 2 to the coarse screen cylinder 4, achieving the function of grading and screening. Furthermore, slag collection troughs 5 are correspondingly installed below the fine screen cylinder 2, the medium screen cylinder 3, and the coarse screen cylinder 4. The slag collection troughs 5 can individually receive and process the slag screened by each screening cylinder, preventing the screened slag from becoming disordered and improving the quality of grading and screening.

[0036] While screening, the blower 7 is started, and the dust collection hood 6 generates suction, which easily collects the dust generated during screening and prevents the dust from flowing out of the slag collection trough 5 and spreading to the surrounding area, affecting the surrounding environment. The dust is sucked into the filter box 8 and first passes through the filter plate, which can reduce the amount of dust entering the blower 7, making it easier to protect the blower 7. This enables the screening mechanism to achieve the functions of screening and dust removal, and improves the practicality of the screening mechanism.

[0037] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation 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.

[0038] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A grading and screening mechanism for the recycling of municipal solid waste incinerator slag, comprising an outer cylinder (1) and a screen cylinder; the screen cylinder is disposed inside the outer cylinder (1) and is rotatable within the outer cylinder (1); characterized in that: The screen cylinder includes a fine screen cylinder (2), a medium screen cylinder (3), and a coarse screen cylinder (4); the medium screen cylinder (3) has a hollow structure and both ends are open; the fine screen cylinder (2) and the coarse screen cylinder (4) both have a hollow structure and one end is open and the other end is closed; the open end of the fine screen cylinder (2) and the open end of the coarse screen cylinder (4) are respectively connected to the two open ends of the medium screen cylinder (3); a V-shaped slag collection trough (5) is provided through the lower part of the inner wall of the outer cylinder (1); there are three slag collection troughs (5), and the three slag collection troughs (5) are respectively located below the fine screen cylinder (2), the medium screen cylinder (3), and the coarse screen cylinder (4); a feeding mechanism is provided on the side of the outer cylinder (1) facing the fine screen cylinder (2); the feeding mechanism is used to transport the slag to be screened into the screen cylinder; A dust collection hood (6) is provided above the interior of the outer cylinder (1). There are three dust collection hoods (6), and the three dust collection hoods (6) are respectively located above the fine sieve cylinder (2), the medium sieve cylinder (3), and the coarse sieve cylinder (4). A fan (7) and a filter box (8) are provided on the outer cylinder (1). A filter plate is provided inside the filter box (8). An air inlet (9) and an air outlet (10) communicating with the filter box (8) are respectively provided on the upper and lower sides of the filter plate. The input end of the fan (7) is connected to the air outlet (10). The dust collection hood (6) is connected to the air inlet (9) through a pipe.

2. The grading and screening mechanism for municipal solid waste incinerator slag recycling according to claim 1, characterized in that: The feeding mechanism includes a feeding cylinder (11), a feed inlet (12), an auger (13), a drive shaft (14), and a motor (15); the feeding cylinder (11) has a hollow structure with one open end and the other closed end, and the feed inlet (12) is located on the feeding cylinder (11); the open end of the feeding cylinder (11) passes through the outer cylinder (1) and extends into the interior of the fine screen cylinder (2), and the outer wall of the feeding cylinder (11) is fixedly connected to the outer cylinder (1); the auger (13) is located on the feeding cylinder (14). 1) Inside, the drive shaft (14) is set at one end of the auger (13), and the other end of the drive shaft (14) is fixedly connected to the inner wall of the coarse screen cylinder (4). The fine screen cylinder (2), the medium screen cylinder (3), and the coarse screen cylinder (4) are uniformly provided with connecting rods (16) that are fixedly connected to the outer circumference of the drive shaft (14); the motor (15) is set outside the closed end of the feed cylinder (11), and the output end of the motor (15) is fixedly connected to the other end of the auger (13) through a rotating shaft.

3. The grading and screening mechanism for municipal solid waste incinerator slag recycling according to claim 1, characterized in that: Guide sleeves (17) are provided on the outer walls of adjacent fine screen cylinder (2), medium screen cylinder (3) and coarse screen cylinder (4). A guide rail (18) adapted to the guide sleeve (17) is provided on the inner wall of the outer cylinder (1). The guide sleeve (17) is located in the groove of the guide rail (18) and can rotate in the groove of the guide rail (18).

4. The grading and screening mechanism for municipal solid waste incinerator slag recycling according to claim 1, characterized in that: The outer cylinder (1) has a slag discharge port (19) on the side opposite to the feeding mechanism, and the coarse screen cylinder (4) has a through groove (20) on the lower side of the closed end. The diameter of the slag discharge port (19) is larger than the diameter of the through groove (20).

5. A grading and screening mechanism for the recycling of municipal solid waste incinerator slag according to claim 1, characterized in that: The filter plate consists of a support sleeve (21) and a filter screen (22) disposed inside the support sleeve (21); the top of the support sleeve (21) is provided with a U-shaped bracket (23) with the opening facing downward, and an impact block (24) is provided above the bracket (23); a lifting device (25) is embedded in the top of the filter box (8), and the output end of the lifting device (25) is disposed on the impact block (24).

6. A grading and screening mechanism for the recycling of municipal solid waste incinerator slag according to claim 1, characterized in that: The bottom of the filter box (8) is funnel-shaped, and the bottom of the filter box (8) is provided with a ash discharge port (26), and the ash discharge port (26) is provided with a threaded cap (27).

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