A bag filter for asphalt stations

Abstract

This utility model discloses a baghouse dust collector for asphalt plants, including a dust collection box. A dust collection assembly is located at the lower end of the dust collection box, and a clean air chamber is located at the upper end. The dust collection assembly includes a dust hopper, on which a toothed ring is rotatably mounted. A scraper is fixedly connected to the toothed ring, which is driven by a first motor. A filter bag mounting frame is built into the dust collection box. Sliding blocks are welded and fixed to both sides of the filter bag mounting frame. Sliding grooves are formed on both inner walls of the dust collection box, and springs are installed between the sliding blocks and the sliding grooves. The filter bag mounting frame is driven by a second motor. This utility model adds a scraper inside the dust hopper for removing stubborn stains. The scraper can rotate relative to the dust hopper under the drive of the first motor, scraping away dirt adhering to the inner wall of the dust hopper, promptly removing dust and dirt adhering to the inner wall of the dust hopper, preventing dust accumulation in the dust hopper. Mechanical vibration cleaning and pulse jet cleaning are used in combination for comprehensive cleaning.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology for asphalt stations, specifically a bag filter for asphalt stations. Background Technology

[0002] A large amount of dust is easily generated in asphalt mixing plants, including dust generated during the loading, unloading and screening of sand and gravel, high-temperature dust generated during the heating and drying of sand and gravel, and asphalt fumes generated when asphalt is mixed with aggregates. If dust removal is not carried out, it will have a serious impact on the environment, equipment, personnel health and business operations.

[0003] The dust from asphalt plants has a certain stickiness and easily adheres to the surface of the dust collector filter bags, forming "floating dust" that is difficult to remove. The short duration and long cycle of a single pulse jet cleaning process result in the dust on the filter bags not being completely removed. Over time, this accumulation leads to the bags becoming clogged, and some dust adheres to the inner wall of the ash hopper, forming stubborn stains. Utility Model Content

[0004] The purpose of this utility model is to provide a bag filter for asphalt plants to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a baghouse dust collector for asphalt plants, comprising a dust collection box, a dust collection assembly at the lower end of the dust collection box, a clean air chamber at the upper end of the dust collection box, the dust collection assembly comprising a dust hopper, a toothed ring rotatably mounted on the dust hopper, a scraper fixedly connected to the toothed ring, the toothed ring being driven by a first motor, a filter bag mounting frame inside the dust collection box, sliders welded and fixed on both sides of the filter bag mounting frame, grooves formed on both inner walls of the dust collection box, a spring between the slider and the groove, and the filter bag mounting frame being driven by a second motor.

[0006] The slider of the filter bag mounting frame is embedded in the slide groove of the dust collector and is slidably connected to the slide groove. The filter bag mounting frame is provided with multiple sets of filter bag bodies.

[0007] The output shaft of the second motor is fixedly connected to a cam via a coupling, and the cam contacts the lower end face of the filter bag mounting bracket.

[0008] The scraper is in contact with the inner wall of the ash hopper.

[0009] The dust collector is welded and fixed to a bracket at its lower end, and a side frame is welded and fixed to the bracket. The first motor is mounted on the side frame.

[0010] The output shaft of the first motor is fixedly connected to a gear via a coupling, and the gear meshes with a gear ring for transmission, while the gear ring is rotatably connected to the ash hopper.

[0011] An air inlet pipe is provided on one side of the ash hopper.

[0012] An exhaust pipe is provided on the clean air chamber.

[0013] The ash hopper is equipped with an ash discharge pipe at its lower end, and a valve is installed on the ash discharge pipe. An air manifold is installed on the outer side of the dust collector, and the air manifold is connected to an electromagnetic pulse valve. The electromagnetic pulse valve is connected to a blowpipe, and the blowpipe is located above the filter bag mounting frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model adds a scraper inside the ash hopper for scraping off stubborn stains. The scraper can rotate relative to the ash hopper under the drive of the first motor to scrape off the dirt adhering to the inner wall of the ash hopper, and promptly remove the dust and dirt adhering to the inner wall of the ash hopper to prevent ash accumulation in the ash hopper.

[0016] 2. The dust collector of this utility model is equipped with a mechanical vibration cleaning component. The mechanical vibration cleaning and pulse jet cleaning are used in combination to cover dust of all particle sizes and to thoroughly remove dust from the filter bags, thus avoiding the phenomenon of bag clogging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure from one side view of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall structure from another side view of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the dust collection component of this utility model;

[0020] Figure 4 This is a partial sectional view of one side of the dust collector box of this utility model;

[0021] Figure 5 This is a partial sectional view of the other side of the dust collector box of this utility model;

[0022] Figure 6 This is a schematic diagram of the filter bag mounting bracket of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the cam of this utility model.

[0024] In the diagram: 1. Dust collector box; 2. Ash collection assembly; 3. Clean air chamber; 4. Support frame; 5. First motor; 11. Filter bag mounting frame; 12. Filter bag body; 13. Air manifold; 14. Electromagnetic pulse valve; 15. Blowpipe; 16. Slide rail; 17. Slider; 18. Spring; 19. Second motor; 191. Cam; 21. Ash hopper; 22. Gear ring; 23. Scraper; 24. Air inlet pipe; 25. Ash discharge pipe; 26. Valve; 31. Exhaust pipe; 41. Side frame; 51. Gear. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-7 This utility model provides a technical solution: a bag filter for asphalt stations, including a dust collection box 1, a dust collection component 2 at the lower end of the dust collection box 1, and a clean air chamber 3 at the upper end of the dust collection box 1. The dust collection component 2 includes a dust hopper 21, a toothed ring 22 rotatably mounted on the dust hopper 21, a scraper 23 fixedly connected to the toothed ring 22, and the toothed ring 22 is driven by a first motor 5. A filter bag mounting frame 11 is built into the dust collection box 1, and sliders 17 are welded and fixed on both sides of the filter bag mounting frame 11. Slide grooves 16 are opened on both sides of the inner wall of the dust collection box 1, and springs 18 are arranged between the sliders 17 and the slide grooves 16. The filter bag mounting frame 11 is driven by a second motor 19.

[0027] A scraper 23 for removing stubborn stains is added inside the ash hopper 21. When the first motor 5 is working, it drives the gear 51 at one end to rotate. The gear 51 meshes and drives the gear ring 22 to rotate relative to the ash hopper 21. The gear ring 22 drives the scraper 23 fixed to it to move synchronously. During the movement, the scraper 23 scrapes off the dirt adhering to the inner wall of the ash hopper 21, and removes the dust and dirt adhering to the inner wall of the ash hopper 21 in time, preventing ash accumulation in the ash hopper 21.

[0028] The slider 17 of the filter bag mounting frame 11 is embedded in the slide groove 16 of the dust collector box 1 and is slidably connected with the slide groove 16. Multiple filter bag bodies 12 are provided on the filter bag mounting frame 11.

[0029] The output shaft of the second motor 19 is fixedly connected to the cam 191 via a coupling, and the cam 191 contacts the lower end face of the filter bag mounting bracket 11.

[0030] The filter bag mounting frame 11 is elastically connected to the inner wall slide groove 16 of the dust collector 1 and can slide along the slide groove 16. When the second motor 19 is working, it drives the cam 191 at one end to rotate. The cam 191 drives the filter bag mounting frame 11 to move relative to the dust collector 1. The rotating cam 191 drives the filter bag mounting frame 11 to jump continuously, thereby driving multiple sets of filter bag bodies 12 to jump synchronously, generating excitation force. The periodic force generated by mechanical vibration breaks the adhesion between dust and filter bag body 12, thereby achieving efficient dust removal. The combined use of mechanical vibration dust removal and pulse jet cleaning covers dust of all particle sizes, thoroughly removes dust from the filter bags, and avoids bag clogging.

[0031] In this process, the scraper 23 contacts the inner wall of the ash hopper 21, and the scraper 23 scrapes off the dirt adhering to the inner wall of the ash hopper 21 during its movement.

[0032] The dust collector 1 has a bracket 4 welded and fixed to its lower end, and a side frame 41 welded and fixed to the bracket 4. The first motor 5 is installed on the side frame 41. The first motor 5 is an external structure, which is convenient for maintenance.

[0033] The output shaft of the first motor 5 is fixedly connected to the gear 51 through a coupling, and the gear 51 meshes with the gear ring 22 for transmission. The gear ring 22 is rotatably connected to the ash hopper 21. When the first motor 5 is working, it drives the gear 51 at one end to rotate, and through the meshing transmission between the teeth, it drives the gear ring 22 to rotate relative to the ash hopper 21.

[0034] An air inlet pipe 24 is provided on one side of the ash hopper 21.

[0035] The clean air chamber 3 is equipped with an exhaust pipe 31. Under the action of the fan, the gas containing dust from the outside enters through the air inlet pipe 24, is removed by the dust collector 1, and the clean gas is discharged through the exhaust pipe 31, thus purifying the gas in the asphalt station.

[0036] The lower end of the ash hopper 21 is provided with an ash discharge pipe 25, and a valve 26 is installed on the ash discharge pipe 25. An air tank 13 is installed on the outer side of the dust collector 1. The air tank 13 is used to store compressed air. The air tank 13 is connected to an electromagnetic pulse valve 14. The electromagnetic pulse valve 14 is connected to a blowpipe 15. The blowpipe 15 is located above the filter bag mounting frame 11. Through the instantaneous impact force of the high-pressure pulse airflow, the high-speed airflow forms turbulence on the surface of the filter bag body 12, destroying the dust layer structure and removing dust from the surface and deep layers of the filter bag body 12.

[0037] Working principle: During operation, under the action of the fan, external gas containing dust enters through the inlet pipe 24 and flows to the filter bag area. Dust particles larger than the pores of the filter bag are directly intercepted. The filtered gas passes through the filter bag and enters the clean air chamber 3, and is discharged through the exhaust pipe 31. When dust blowing is required, the instantaneous impact force of the high-pressure pulse airflow creates turbulence on the surface of the filter bag body 12, destroying the dust layer structure and removing dust from the surface and deep layers of the filter bag body 12. At the same time, the second motor 19 drives one end of the filter bag body 12. The cam 191 rotates, driving multiple filter bag bodies 12 to jump synchronously, generating excitation force. The periodic force generated by mechanical vibration breaks the adhesion between dust and filter bag bodies 12. Mechanical vibration cleaning and pulse jet cleaning are used in combination. When discharging ash, simply open the valve 26 of the ash hopper 21. If there are stubborn stains on the inner wall of the ash hopper 21, the first motor 5 drives the gear 51 to rotate, which in turn drives the gear ring 22 to drive the scraper 23 to rotate relative to the ash hopper 21, scraping off the dirt adhering to the inner wall of the ash hopper 21.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bag filter for an asphalt plant comprising a filter box (1), characterized in that: The dust collector (1) is provided with a dust collection assembly (2) at its lower end and a clean air chamber (3) at its upper end. The dust collection assembly (2) includes a dust hopper (21) and a toothed ring (22) is rotatably mounted on the dust hopper (21). The toothed ring (22) is fixedly connected to a scraper (23). The toothed ring (22) is driven by a first motor (5). The dust collector (1) is equipped with a filter bag mounting frame (11). A slider (17) is welded and fixed on both sides of the filter bag mounting frame (11). A sliding groove (16) is opened on both sides of the inner wall of the dust collector (1). A spring (18) is provided between the slider (17) and the sliding groove (16). The filter bag mounting frame (11) is driven by a second motor (19).

2. The baghouse for an asphalt plant of claim 1, wherein: The slider (17) of the filter bag mounting bracket (11) is embedded in the groove (16) of the dust collector (1) and is slidably connected with the groove (16). Multiple filter bag bodies (12) are provided on the filter bag mounting bracket (11).

3. The baghouse for an asphalt plant of claim 1, wherein: The output shaft of the second motor (19) is fixedly connected to the cam (191) via a coupling, and the cam (191) is in contact with the lower end face of the filter bag mounting bracket (11).

4. The baghouse for an asphalt plant of claim 1, wherein: The scraper (23) contacts the inner wall of the ash hopper (21).

5. The baghouse for an asphalt plant of claim 1, wherein: A bracket (4) is welded and fixed to the lower end of the dust collection box (1), and a side frame (41) is welded and fixed to the bracket (4). The first motor (5) is mounted on the side frame (41).

6. The baghouse for an asphalt plant of claim 1, wherein: The output shaft of the first motor (5) is fixedly connected to the gear (51) through a coupling, and the gear (51) meshes with the gear ring (22) for transmission, and the gear ring (22) is rotatably connected to the ash hopper (21).

7. A baghouse dust collector for asphalt plants according to claim 1, characterized in that: An air inlet pipe (24) is provided on one side of the ash hopper (21).

8. The baghouse for an asphalt plant of claim 1, wherein: An exhaust pipe (31) is provided on the clean air chamber (3).

9. The baghouse for an asphalt plant of claim 1, wherein: The lower end of the ash hopper (21) is provided with an ash discharge pipe (25), and a valve (26) is installed on the ash discharge pipe (25). An air tank (13) is installed on the outer side of the dust collector (1). The air tank (13) is connected to an electromagnetic pulse valve (14). The electromagnetic pulse valve (14) is connected to a blowpipe (15). The blowpipe (15) is located above the filter bag mounting frame (11).

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