Self-cleaning device for ash conveying scraper of waste incinerator

Abstract

The utility model discloses a kind of garbage incinerator ash conveying scraper self-cleaning device, it is installed in the transmission chain and the return section below of scraper of buried scraper, including rack, brush roller, tension adjusting assembly and dust hopper, both ends of the brush roller are equipped with rotating roller support, and driving transmission case and ash scraping motor that brush roller rotates are installed on rotating roller support, the bristles of the brush roller contact with the scraper return section lower surface of buried scraper, the tension adjusting assembly is connected with rotating roller support, for adjusting the contact pressure between the bristles of brush roller and scraper, the dust hopper is set below brush roller. The utility model can rotate and clean the scraper of buried scraper return section by brush roller, can deeply clean fine dust, save the trouble of needing to stop machine manual cleaning, and dust hopper, ash conveying pipe, ash collecting cylinder and negative pressure air induction system are set, can successfully suck and collect ash material that is scraped and brushed, improve working environment, more safe and environmental protection.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for waste incineration power plants, and in particular to a self-cleaning device for ash conveying scrapers in waste incinerators. Background Technology

[0002] During the waste-to-energy incineration process, the ash produced by incineration needs to be transported to the subsequent processing stages by a scraper conveyor. Due to the complex composition of the ash, which often contains a certain amount of moisture and sticky substances, it is very easy to adhere to the surface of the scraper of the scraper conveyor. When the scraper enters the return section, the adhered ash will be carried back, causing the "return material" phenomenon. This not only leads to material loss and pollution of equipment and the environment, but the detached ash pieces may also clog or wear the equipment, increasing the equipment failure rate and maintenance workload.

[0003] In the existing technology, when cleaning the scraper of the buried scraper conveyor, maintenance personnel mainly use tools such as sledgehammers, steel chisels, pneumatic picks, and crowbars to knock and scrape off the hard ash blocks adhering to the scraper and chain. This cleaning method requires the machine to be stopped, which is not only labor-intensive and inefficient, but also poses a risk of dust inhalation.

[0004] To address these issues, we propose a self-cleaning device for the ash conveying scraper of a waste incinerator. Utility Model Content

[0005] The purpose of this invention is to provide a self-cleaning device for the ash conveying scraper of a waste incinerator to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A self-cleaning device for ash conveying scrapers in a waste incinerator is installed below the drive chain and return section of the scraper conveyor. It includes a frame, a brush roller, a tension adjustment assembly, and an ash collection hopper. Both ends of the brush roller are equipped with roller supports, and a transmission box for driving the brush roller's rotation and an ash scraping motor are mounted on the roller supports. The bristles of the brush roller contact the lower surface of the return section of the scraper conveyor. The tension adjustment assembly is connected to the roller supports and is used to adjust the contact pressure between the brush roller bristles and the scraper. The ash collection hopper is located below the brush roller and is used to collect the removed ash.

[0007] In a further embodiment, the rotation direction of the brush roller is opposite to the return travel direction of the scraper conveyor.

[0008] In a further embodiment, the tension adjustment assembly includes a slider and a straight rail that are vertically slidably connected, and the slider and the straight rail are locked together by locking bolts. The straight rail is fixed to the outer wall of the ash hopper, and the slider is fixed to one end of the roller support that extends out of the ash hopper.

[0009] In a further embodiment, the bottom end of the ash collection hopper is connected to an ash collection cylinder via an ash conveying pipe. The ash collection cylinder contains a filter cartridge, and a pipe neck is installed at the top of the filter cartridge. One end of the pipe neck, which protrudes from the top of the ash collection cylinder, is connected to an induced draft fan via a rotary joint.

[0010] In a further embodiment, the height of the end of the ash conveying pipe near the ash collection hopper is higher than the height of the other end.

[0011] In a further embodiment, a bevel gear disc is fixed on the outer wall of one end of the tube neck that protrudes from the top of the ash collection cylinder. A bevel gear is meshed with the periphery of the bevel gear disc, and a cleaning motor is connected to the shaft end of the bevel gear. A scraper is fixed on the inner wall of the ash collection cylinder, and the scraper is in contact with the outer wall of the filter element cylinder. A spiral shaft is installed at the bottom end of the filter element cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a brush roller to rotate and clean the scraper on the return section of the scraper conveyor, which can deeply clean fine dust and achieve good cleaning results. It eliminates the trouble of having to stop the machine for manual cleaning. In addition, it is equipped with a dust collection hopper, dust conveying pipe, dust collection cylinder and negative pressure ventilation system, which can not only smoothly suck in and collect the dust scraped and brushed down, but also capture and remove the dust that is inevitably generated when the brush roller rotates at high speed before it spreads, thus improving the working environment and making it safer and more environmentally friendly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the layout structure of the present utility model and the buried scraper conveyor; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model from below; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the ash collection cylinder of this utility model.

[0014] In the diagram: 1. Scraper conveyor; 2. Frame; 3. Drive chain; 4. Scraper; 5. Brush roller; 6. Rotary roller support; 7. Transmission box; 8. Scraper motor; 9. Tension adjustment assembly; 91. Slider; 92. Straight rail; 93. Locking bolt; 10. Ash hopper; 11. Ash conveying pipe; 12. Ash collection cylinder; 13. Filter cartridge; 14. Pipe neck; 15. Rotary joint; 16. Exhaust fan; 17. Bevel gear disc; 18. Bevel gear; 19. Cleaning motor; 20. Scraper blade; 21. Spiral shaft. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 A self-cleaning device for ash conveying scrapers in a waste incinerator is installed below the return section of the drive chain 3 and scraper 4 of the buried scraper conveyor 1. It mainly includes a frame 2, a brush roller 5, a tension adjustment component 9, and an ash collection hopper 10. The frame 2 is fixed to the support structure of the buried scraper conveyor 1 by welding or bolting, providing basic support for the entire device.

[0019] The brush roller 5 is located below the return direction of the scraper machine 1. Its bristles are made of wear-resistant nylon or steel wire. Both ends of the brush roller 5 are supported by the roller support 6. The roller support 6 is equipped with a transmission box 7 and a dust scraping motor 8. The dust scraping motor 8 drives the brush roller 5 to rotate through the transmission gears or transmission sprockets arranged in the transmission box 7. The rotation direction of the brush roller 5 is opposite to the return direction of the scraper machine 1 to enhance the cleaning effect. The bristles are in contact with the transmission chain 3 and the scraper 4 for rotating and cleaning dust.

[0020] The tension adjustment assembly 9 is used to adjust the contact pressure between the brush roller 5 and the transmission chain 3 and scraper 4 to ensure cleaning effect and prevent excessive wear. The tension adjustment assembly 9 includes a slider 91, a straight rail 92 and a locking bolt 93. The straight rail 92 is fixed on the outer wall of the dust collection hopper 10. The slider 91 is vertically slidably connected to the straight rail 92 and locked in position by the locking bolt 93. The roller support 6 extends out of the dust collection hopper 10 and its ends are fixed to the corresponding slider 91. By loosening the locking bolt 93, the slider 91 can be manually adjusted to move up and down along the straight rail 92, thereby changing the height of the brush roller 5. After adjustment, tightening the locking bolt 93 will fix it.

[0021] The ash collection hopper 10 is located directly below the brush roller 5 and is used to collect the ash material removed by the brush roller 5. The bottom end of the ash collection hopper 10 is connected to the ash collection cylinder 12 through the ash conveying pipe 11. The ash conveying pipe 11 is installed at an angle, with the end near the ash collection hopper 10 being higher than the other end, so that the ash material slides towards the ash collection cylinder 12 by gravity.

[0022] The dust collection cylinder 12 is equipped with a filter cartridge 13, which is made of porous filter material, such as a metal mesh, to filter dust in the airflow. A pipe neck 14 is installed at the top of the filter cartridge 13, extending out of the top of the dust collection cylinder 12 and connected to an induced draft fan 16 via a rotary joint 15. When the induced draft fan 16 operates, it generates a negative pressure inside the dust collection cylinder 12, drawing dust-laden air from the dust collection hopper 10 into the dust conveying pipe 11. The air is then filtered by the filter cartridge 13 before being discharged, while the dust is trapped within the filter. Outside the core cylinder 13, through the ash collection hopper 10, ash conveying pipe 11, ash collection cylinder 12 and induced draft fan 16, the negative pressure generated by the induced draft fan 16 in the ash collection cylinder 12 can not only smoothly suck in and collect the scraped and brushed ash, but more importantly, it can capture and remove the dust that is inevitably generated when the brush roller 5 rotates at high speed before it spreads. The dust-laden gas is filtered by the filter core cylinder 13 to achieve gas-dust separation, clean air is discharged, and dust is intercepted and collected.

[0023] A bevel gear disc 17 is fixed to the outer wall of one end of the neck 14 that protrudes from the top of the dust collection cylinder 12. The bevel gear disc 17 meshes with a bevel gear 18. The shaft end of the bevel gear 18 is connected to a dust removal motor 19. The dust removal motor 19 drives the bevel gear 18 and the bevel gear disc 17 to rotate, thereby driving the filter cartridge 13 to rotate slowly. A scraper 20 is fixed to the inner wall of the dust collection cylinder 12. The scraper 20 contacts the outer wall of the filter cartridge 13. When the filter cartridge 13 rotates, the scraper 20 scrapes off the dust layer attached to the surface of the filter cartridge 13. A spiral shaft 21 is installed at the bottom of the filter cartridge 13 to collect and discharge the scraped dust from the dust collection cylinder 12. The structure that drives the filter cartridge 13 to rotate can periodically or continuously remove the dust layer attached to the surface of the filter cartridge 13, prevent the filter cartridge 13 from clogging, and ensure that the negative pressure ventilation works continuously and efficiently. Combined with the spiral shaft 21 at the bottom, the automatic cleaning and discharge of collected dust is realized.

[0024] Work process: The scraper conveyor 1 operates in the ash conveying system of the waste incinerator. When the scraper 4 and drive chain 3 enter the return section, the ash adhering to the surface moves with them. The scraper motor 8 and induced draft fan 16 are started, and the brush roller 5 begins to rotate. The induced draft fan 16 generates negative pressure in the ash collection cylinder 12. The scraper 4 and drive chain 3 pass through the brush roller 5, which sweeps away the residual dust. The removed ash falls into the ash collection hopper 10 and slides into the ash collection cylinder 12 through the inclined ash conveying pipe 11 under the action of gravity. Under the negative pressure of the fan 16, dusty air is drawn into the dust collection cylinder 12. The air is filtered through the filter cartridge 13 and discharged cleanly. Dust is trapped on the outside of the filter cartridge 13. When the filter cartridge 13 needs to be cleaned, the dust cleaning motor 19 is started, which drives the filter cartridge 13 to rotate through the bevel gear 18 and bevel gear disc 17. The scraper 20 scrapes off the dust layer on the surface of the filter cartridge 13. The dust is collected by the spiral shaft 21 and discharged from the dust collection cylinder 12. The bottom end of the dust collection cylinder 12 is connected to a dust collection device, thereby removing the dust from the device.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-cleaning device for ash conveying scrapers in a waste incinerator, installed below the drive chain (3) and the return section of the scraper (4) of a buried scraper conveyor (1), characterized in that: The machine includes a frame (2), a brush roller (5), a tension adjustment assembly (9), and a dust collection hopper (10). Both ends of the brush roller (5) are provided with roller supports (6), and the roller supports (6) are equipped with a transmission box (7) for driving the brush roller (5) to rotate and a scraper motor (8). The bristles of the brush roller (5) are in contact with the lower surface of the return section of the scraper (4) of the buried scraper machine (1). The tension adjustment assembly (9) is connected to the roller support (6) and is used to adjust the contact pressure between the bristles of the brush roller (5) and the scraper (4). The dust collection hopper (10) is located below the brush roller (5) and is used to collect the removed dust.

2. The self-cleaning device for ash conveying scraper of a waste incinerator according to claim 1, characterized in that: The rotation direction of the brush roller (5) is opposite to the return direction of the scraper (4) of the buried scraper machine (1).

3. The self-cleaning device for ash conveying scraper of a waste incinerator according to claim 1, characterized in that: The tension adjustment assembly (9) includes a vertically sliding slider (91) and a straight rail (92), and the slider (91) and the straight rail (92) are locked together by a locking bolt (93). The straight rail (92) is fixed to the outer wall of the ash hopper (10), and the slider (91) is fixed to one end of the roller support (6) that extends out of the ash hopper (10).

4. The self-cleaning device for ash conveying scraper of a waste incinerator according to claim 1, characterized in that: The bottom end of the ash collection hopper (10) is connected to the ash collection cylinder (12) through the ash conveying pipe (11). The ash collection cylinder (12) is equipped with a filter cylinder (13), and the top end of the filter cylinder (13) is equipped with a pipe neck (14). One end of the pipe neck (14) that extends out of the top of the ash collection cylinder (12) is connected to the induced draft fan (16) through a rotary joint (15).

5. The self-cleaning device for ash conveying scraper of a waste incinerator according to claim 4, characterized in that: The height of one end of the ash conveying pipe (11) near the ash collection hopper (10) is higher than the height of the other end.

6. The self-cleaning device for ash conveying scraper of a waste incinerator according to claim 4, characterized in that: A bevel gear disc (17) is fixed on the outer wall of one end of the neck (14) that protrudes from the top of the ash collection cylinder (12). A bevel gear (18) is meshed around the bevel gear disc (17), and a cleaning motor (19) is connected to the shaft end of the bevel gear (18). A scraper (20) is fixed on the inner wall of the ash collection cylinder (12), and the scraper (20) is in contact with the outer wall of the filter element cylinder (13). A spiral shaft (21) is installed at the bottom end of the filter element cylinder (13).

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