A bag-type dust collector with no need of maintenance

Abstract

The utility model relates to a kind of cloth bag dust collector of exempting from maintenance, including fan, inlet air bellow, 2 inlet air brake, 2 sets of cloth bag dust collector unit and 2 sets of cloth bag external dust removal device;Fan is connected with inlet air bellow;2 sets of cloth bag dust collector unit are connected after inlet air bellow, and inlet air brake is equipped between cloth bag dust collector unit and inlet air bellow;Each set of cloth bag dust collector unit includes 1 cloth air bellow, several filter dust cloth bag and 1 set of ash cleaning device;Cloth air bellow includes distribution box, and several filter dust cloth bag is arranged on distribution box;The bottom opening of filter dust cloth bag is communicated with distribution box;The lower part of cloth air bellow is equipped with dust collecting hopper, and the bottom of dust collecting hopper is equipped with ash removal device.The utility model structure is simple, and easy to realize;When 1 set of cloth bag dust collector unit suspends work, can automatically clean ash, so that filter dust cloth bag quickly restores working condition, and the ash cleaned can be automatically discharged by ash removal device;After being set, full-automatic operation can be realized, and air filter dust effect is good.

Description

Technical Field

[0001] This utility model relates to a bag filter dust collector, and in particular to a bag filter dust collector that can be maintained without shutting down and can operate continuously, belonging to the field of dust removal machinery and equipment. Background Technology

[0002] Baghouse dust collectors are a type of high-efficiency dry dust collector. Dust-laden air is introduced into the baghouse dust collector, and as the air passes through the filter bags, the suspended particulate matter in the gas is captured by the filter bags and remains on the inside of the bags, while the clean air passes through the filter bags, thus achieving the purpose of dust removal. It has high dust removal efficiency and is widely used.

[0003] As dust particles accumulate on filter bags over time, they require regular cleaning. Otherwise, the bags become completely clogged and can no longer filter dust. Common cleaning methods include gas cleaning and mechanical vibration cleaning. Gas cleaning primarily involves pulsed cleaning, which uses a pulsed airflow to spray into the filter bags, causing them to expand rapidly and vibrate, thus shaking off the accumulated dust. However, this requires a specialized airflow generator and must utilize the existing air intake channel. Mechanical vibration cleaning uses mechanical vibration to shake off the dust from the filter bags. However, since the inside of filter bags is generally composed of long fibers, simply using gas cleaning or mechanical vibration to vibrate the bags and shake off the dust is not very effective and the cleaning is not thorough, thus requiring frequent shutdowns for cleaning.

[0004] Baghouse dust collectors need to be shut down for maintenance to remove dust, which in some cases prevents the introduction of dust-laden air for treatment, affecting on-site processing needs.

[0005] Therefore, in order to meet the on-site air dust removal needs, it is necessary to design a bag filter dust collector that can be maintained without downtime and can continuously perform dust removal operations. Utility Model Content

[0006] The purpose of this utility model is to provide a bag filter dust collector that requires no downtime for maintenance. It is equipped with two independently operating bag filter dust collector units that can be easily switched, so that one unit is always in dust collection operation, thereby achieving operation without downtime.

[0007] To achieve the above-mentioned utility model objectives, this utility model provides a bag filter dust collector that requires no downtime maintenance, including a fan, an inlet air box, two inlet air dampers, two sets of bag filter dust collector units, and two sets of external bag dust collection devices.

[0008] The fan is connected to the inlet air box; two sets of bag filter dust collectors are connected after the inlet air box, and an inlet air damper is provided between the bag filter dust collectors and the inlet air box;

[0009] Each baghouse dust collector unit includes one air box, several filter bags, and one dust removal device.

[0010] The air distribution box includes a distribution box, on which several dust filter bags are arranged; the bottom opening of the dust filter bags is connected to the distribution box.

[0011] The lower part of the air distribution box is equipped with a dust collection funnel, and the bottom of the dust collection funnel is equipped with a dust discharge device.

[0012] As a further improvement of this utility model, the dust removal device of the bag filter unit includes a dust removal device inside the bag and a dust removal device outside the bag.

[0013] The dust collection device inside the bag filter includes a vertical scraper, a rotating shaft, and a rotary drive device;

[0014] The scraper rests against the inner wall of the filter bag; the scraper is positioned along the entire height of the filter bag;

[0015] The scraper is mounted on the rotating shaft via a horizontal plate; the rotating shaft is located on the axis of the dust filter bag;

[0016] The top of the rotating shaft passes through the sealing cover plate at the top of the filter dust bag and is then connected to the rotary drive device;

[0017] The external bag filter dust collector includes a pipe frame, nozzles, and a lifting drive device;

[0018] The tube frame surrounds the outside of the dust filter bag. The tube frame is an air pipe that is closed and continuous, and is connected to an external compressed air source.

[0019] The tube rack is equipped with several nozzles, which face the outer surface of the dust filter bag. Each dust filter bag has several nozzles on its outside.

[0020] The nozzle is connected to an external compressed air source via a pipe rack;

[0021] The tube frame of the external dust collector is installed on the lifting device, which drives the tube frame and nozzles to move up and down along the outer surface of the filter bag.

[0022] Furthermore, a bracket is provided between the horizontal plate of the dust removal device inside the bag and the scraper, and the scraper is detachably mounted on the bracket.

[0023] Furthermore, the scraper is provided in several sets, and the horizontal projection of the scraper is symmetrical or evenly distributed.

[0024] Furthermore, the scraper and horizontal plate are set vertically.

[0025] Furthermore, the rotary drive is a belt drive;

[0026] The top of the rotating shaft is fitted with a drive wheel. The drive wheels on the top of the rotating shaft inside several dust filter bags are connected together by a rotating belt. The rotating belt is connected to the drive wheel of the scraper rotation drive motor.

[0027] Furthermore, the pipe rack of the bag filter external dust collector is equipped with several guide wheels;

[0028] The guide wheel cooperates with the vertical rod of the equipment support to form a vertical motion limiting and guiding mechanism.

[0029] Furthermore, the lifting device of the bag filter external dust collector is such that the outside of the pipe frame is connected to the lifting belt; the bottom of the lifting belt is fitted onto the drive pulley, and the drive pulley is connected to the lifting drive motor.

[0030] The top of the lifting belt is fitted onto the follower pulley, which is mounted on the top of the bracket.

[0031] Furthermore, several lifting belts are connected to the outside of the pipe rack, and each lifting belt is supported and installed by a drive pulley and a follower pulley.

[0032] Several lifting belts have their drive pulleys mounted on the same drive shaft, which is connected to the output end of the lifting drive motor.

[0033] As a further improvement of this utility model, the ash discharge device is an auger mechanism, including an ash inlet, an ash discharge auger, an ash discharge motor, and an ash discharge valve;

[0034] The ash inlet is connected to the bottom of the dust collection funnel; an ash discharge auger is installed below the ash inlet.

[0035] One end of the ash discharge auger is connected to the output shaft of the ash discharge motor, and the other end of the ash discharge auger is the ash discharge end;

[0036] An ash discharge valve is installed outside the ash discharge end, and the ash discharge valve is a gravity valve.

[0037] This utility model discloses a maintenance-free bag filter. By installing an inlet damper at the inlet air box and connecting two sets of bag filter units, the bag filter units can be selectively turned on or off, with only one set of bag filter units operating at a time. When a large amount of dust and debris accumulates on the filter bags of the current bag filter unit, the inlet damper of the other bag filter unit is opened in time, and then the inlet damper of the current bag filter unit is closed, so that the dusty air to be treated can continuously and directly enter the other bag filter unit for dust removal and filtration.

[0038] Currently, baghouse dust collectors activate their cleaning devices for rapid and efficient cleaning, and can even open the filter bags for inspection and replacement. During routine cleaning, the scraper drive motor inside the baghouse dust collector rotates, causing the shaft to rotate. This moves the scraper inside the filter bag along the inner wall, scraping off the dust. Simultaneously, the external dust collector activates, introducing compressed air into the tube frame and spraying it onto the outer wall of the filter bags through nozzles. At the same time, the lifting drive motor starts, moving the tube frame up and down along the outer wall of the filter bags. The high-pressure air acts locally on the outer wall of the filter bags, blowing the dust embedded in the filter fibers inward and causing it to fall off.

[0039] This utility model discloses a maintenance-free bag filter with a simple structure and easy implementation. It achieves dust filtration without downtime by using two sets of bag filter units; when one set is suspended, it can automatically clean the dust, thereby allowing the filter bags to quickly return to working status. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of a maintenance-free bag filter according to the present invention. Figure 1 ;

[0041] Figure 2 This is a schematic diagram of the overall structure of a maintenance-free bag filter according to the present invention. Figure 2 ;

[0042] Figure 3 This is a schematic diagram of the internal structure of a bag filter dust collector that requires no downtime maintenance according to this utility model;

[0043] Figure 4 This is a schematic diagram of the overall structure of the dust removal device;

[0044] Figure 5 This is a schematic diagram of the installation of the dust collection device inside the bag filter;

[0045] Figure 6 This is a schematic diagram of the overall structure of the dust collection device inside the bag filter.

[0046] Figure 7 This is a schematic diagram of the overall structure of the external bag filter dust collector.

[0047] Figure 8 This is a top view of the external bag filter dust collector;

[0048] Figure 9 This is a schematic diagram of the overall structure of the ash removal device. Detailed Implementation

[0049] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0050] This utility model relates to a bag filter dust collector that requires no downtime maintenance, and its overall structure is as follows: Figure 1 , Figure 2 As shown, it includes a fan 11, a duct 12, an inlet air box 13, an inlet air damper 14, a cloth air box 2, several dust filter bags 3, and a dust removal device for the dust filter bags 3, including a dust removal device 4 inside the bag and a dust removal device 5 outside the bag.

[0051] The fan 11 can be installed at the site where the dusty air is generated, or it can be installed at the bag filter dust collector that is maintenance-free and requires no downtime, which is mainly used to introduce the dusty air to be treated.

[0052] The fan 11 is connected to the inlet air box 13 through the air duct 12; the inlet air box 13 is mainly used to guide air.

[0053] Two sets of bag filter dust collectors are connected to the inlet air box 13, and an inlet air damper 14 is provided at the end. One side of the inlet air damper 14 is connected to the inlet air box 13, and the other side is connected to the bag filter 2.

[0054] Each baghouse dust collector unit includes one air box 2, several filter bags 3, and one dust removal device.

[0055] The air distribution box 2 includes a distribution box 21, on which a plurality of dust filter bags 3 are arranged. In this embodiment, each bag dust collector unit is provided with 4 dust filter bags 3; the bottom opening of the dust filter bags 3 is in communication with the distribution box 21.

[0056] The lower part of the air distribution box 2 is provided with a dust collection funnel 22, which is wide at the top and communicates with the distribution box 21, and narrow at the bottom and is connected to the ash discharge device 23.

[0057] An observation window 24 can be provided on the air distribution box 2, especially on the dust collection funnel 22, to facilitate observation of the interior. When a large amount of dust and debris falls, the ash removal device 23 can be activated to carry out ash removal operations.

[0058] This utility model discloses a maintenance-free bag filter. By installing an inlet damper 14 at the inlet air box 13 and connecting two sets of bag filter units, the bag filter units can be selectively turned on or off, with only one set of bag filter units in operation at a time. When a large amount of dust and impurities accumulate on the filter bags 3 of the current bag filter unit, the inlet damper 14 of the other bag filter unit is opened in time, and then the inlet damper 14 of the current bag filter unit is closed, so that the dust-laden air to be treated can continuously and directly enter the other bag filter unit for dust removal and filtration.

[0059] The current bag filter unit starts the dust removal device to carry out fast and efficient dust removal operations, and can even open the filter bag 3 for inspection and replacement.

[0060] This utility model also provides the specific structure of the dust removal device, such as... Figure 4 As shown.

[0061] The specific structure of the bag filter 4 is as follows: Figure 5 , Figure 6 As shown, it includes a vertical scraper 41, which is mounted on a bracket 42. The bracket 42 is mounted on a rotating shaft 44 via a horizontal plate 43. The rotating shaft 44 is located on the axis of the dust filter bag 3. The rotating shaft 44 is relatively long, and to improve stability, both ends of the rotating shaft 44 are hinged to the mounting bracket of the dust filter bag 3. The bottom of the rotating shaft 44 is inserted into the bushing 46, and the top of the rotating shaft 44 passes through the sealing cover plate at the top of the dust filter bag 3 and is then connected to the rotary drive device.

[0062] Several sets of scrapers 41 and brackets 42 are provided. In this embodiment, there are two sets in the attached drawings. They are respectively installed on the upper and lower parts of the rotating shaft 44 through the horizontal plate 43. The horizontal projections of the several sets of scrapers 41 and brackets 42 are symmetrical or evenly distributed. In this way, when the scraper 41 scrapes the inner side of the filter dust bag 3, the horizontal reverse force applied to the rotating shaft 44 can be canceled, thus avoiding the rotating shaft 44 being unbalanced.

[0063] The scraper 41, bracket 42, and horizontal plate 43 are all vertically arranged, with a very small horizontal projection area, thereby reducing the impact on the dusty air to be filtered. This allows the dusty air to flow smoothly from the bottom to the top of the filter bag 3, achieving dust filtration of the entire bag.

[0064] The scraper 41 is fixed by the bracket 42, and can be easily replaced when the scraper 41 is worn; that is, the old scraper 41 can be removed from the bracket 42 and a new scraper 41 can be installed for reuse.

[0065] Furthermore, the scraper 41 can be adjusted according to the dust filter fibers inside the dust filter bag 3.

[0066] The rotary drive device is a belt drive, that is, the top of the rotating shaft 44 is fitted with a drive wheel 47, and several drive wheels 47 are connected together by a rotating belt 48. The rotating belt 48 passes around the scraper to rotate the drive wheel of the drive motor 49.

[0067] Furthermore, a synchronous belt is used for transmission, that is, the drive wheel 47 is a synchronous pulley and the rotating belt 48 is a synchronous belt; the synchronous belt passes around several transition pulleys to turn and tension, ensuring the reliability of the transmission, so that the scrapers 41 in several dust filter bags 3 rotate and work simultaneously to remove dust from the inside of the dust filter bags 3.

[0068] The specific structure of the external dust collector 5 is as follows: Figure 7 , Figure 8As shown, it includes a horizontally arranged tube frame 51, which surrounds the outside of the dust filter bag 3. The tube frame 51 is an air pipe, which is closed and continuous, and is connected to an external compressed air source. The tube frame 51 is provided with several nozzles 52, which face the outer surface of the dust filter bag 3. Each dust filter bag 3 is provided with several nozzles 52. In this embodiment, each dust filter bag 3 is provided with 8 nozzles 52. The nozzles 52 are connected to the tube frame 51. Compressed air generated by the external compressed air source is connected to the tube frame 51 through the air pipe and finally sprayed out through the nozzles 52. The compressed air is sprayed onto the outer surface of the dust filter bag 3.

[0069] The tube frame 51 of the external dust removal device 5 of this utility model is installed on the lifting device, and can be controlled to move up and down along the outer surface of the filter bag 3, thereby performing air jet cleaning of the entire filter bag 3 in the height direction.

[0070] The pipe rack 51 is equipped with guide wheels 53, which cooperate with the vertical rod of the support 6 to limit and guide the lifting and lowering movement of the pipe rack 51.

[0071] The lifting device is specifically designed so that the outside of the pipe frame 51 is connected to the lifting belt 54, and several lifting belts are connected to the outside of the pipe frame 51 at the same time; the bottom of the lifting belt 54 is sleeved on the drive pulley 55, and the drive pulleys 55 of the several lifting belts 54 are mounted on the drive shaft 56 and connected to the output end of the lifting drive motor 57.

[0072] The top of the lifting belt 54 is fitted onto the follower pulley 58, which is mounted on the top of the bracket 6.

[0073] When the dust removal device of this utility model is working, the dust removal device 4 inside the filter bag and the dust removal device 5 outside the filter bag are activated simultaneously; the scraper rotation drive motor 49 works, driving the rotating shaft 44 to rotate, causing the scraper 41 located inside the filter bag 3 to move along the inner wall, scraping off the dust inside the filter bag 3; compressed air is introduced into the tube frame 51 and sprayed onto the outer wall of the filter bag 3 through the nozzle 52; at the same time, the lifting drive motor 57 is activated, driving the tube frame 51 to rise and fall along the outer wall of the filter bag 3. The high-pressure air acts locally on the outer wall of the filter bag 3, blowing the dust embedded in the fibers of the filter bag 3 inward and causing it to fall off, thereby performing a deep cleaning of the filter bag 3. Finally, the dust and impurities trapped inside the filter bag 3 are basically removed, making the filter bag 3 usable again.

[0074] When the dust removal device is working, the dust and debris removed from the inner wall of the dust filter bag 3 will fall down along the dust filter bag 3 due to its own gravity, and finally pass through the distribution box 21 and enter the dust collection funnel 22. The dust collection funnel 22 will gather the dust and debris to the bottom and guide it into the dust discharge device 23.

[0075] The specific structure of the ash removal device 23 is as follows: Figure 9As shown, the auger mechanism includes an inlet 231, an auger 232, a motor 233, and a valve 234. The inlet 231 is connected to the bottom of the dust collection funnel 22. Dust and debris accumulate and fall into the auger 232. When a certain amount accumulates, the motor 233 starts, driving the auger 232 to rotate, causing the dust and debris to move outward along the spiral and finally be discharged through the valve 234 for centralized disposal. After the auger 232 has completely discharged the dust, the valve 234 can seal the outlet, i.e., the ash discharge device 23, to prevent air leakage in subsequent dust removal operations.

[0076] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A maintenance-free baghouse dust collector, characterized in that, It includes a fan, an inlet air box, two inlet air dampers, two sets of bag filter dust collectors, and two sets of external bag filter dust collectors; The fan is connected to the inlet air box; two sets of bag filter dust collectors are connected after the inlet air box, and an inlet air damper is provided between the bag filter dust collectors and the inlet air box; Each baghouse dust collector unit includes one air box, several filter bags, and one dust removal device. The air distribution box includes a distribution box, on which several dust filter bags are arranged; the bottom opening of the dust filter bags is connected to the distribution box. The lower part of the air distribution box is equipped with a dust collection funnel, and the bottom of the dust collection funnel is equipped with a dust discharge device.

2. The maintenance-free baghouse dust collector as described in claim 1, characterized in that, The dust removal device of the bag filter unit includes a dust removal device inside the bag and a dust removal device outside the bag; The dust collection device inside the bag filter includes a vertical scraper, a rotating shaft, and a rotary drive device; The scraper rests against the inner wall of the filter bag; the scraper is positioned along the entire height of the filter bag; The scraper is mounted on the rotating shaft via a horizontal plate; the rotating shaft is located on the axis of the dust filter bag; The top of the rotating shaft passes through the sealing cover plate at the top of the filter dust bag and is then connected to the rotary drive device; The external bag filter dust collector includes a pipe frame, nozzles, and a lifting drive device; The tube frame surrounds the outside of the dust filter bag. The tube frame is an air pipe that is closed and continuous, and is connected to an external compressed air source. The tube rack is equipped with several nozzles, which face the outer surface of the dust filter bag. Each dust filter bag has several nozzles on its outside. The nozzle is connected to an external compressed air source via a pipe rack; The tube frame of the external dust collector is installed on the lifting device, which drives the tube frame and nozzles to move up and down along the outer surface of the filter bag.

3. A maintenance-free baghouse dust collector as described in claim 2, characterized in that, A bracket is provided between the horizontal plate of the dust removal device inside the bag and the scraper, and the scraper is detachably mounted on the bracket.

4. A maintenance-free baghouse dust collector as described in claim 2 or 3, characterized in that, Several sets of scrapers are provided, and the horizontal projections of the scrapers are symmetrical or evenly distributed.

5. A maintenance-free baghouse dust collector as described in claim 2 or 3, characterized in that, The scraper and horizontal plate are set vertically.

6. A maintenance-free baghouse dust collector as described in claim 2, characterized in that, The rotary drive is a belt drive; The top of the rotating shaft is fitted with a drive wheel. The drive wheels on the top of the rotating shaft inside several dust filter bags are connected together by a rotating belt. The rotating belt is connected to the drive wheel of the scraper rotation drive motor.

7. A maintenance-free baghouse dust collector as described in claim 2, characterized in that, The external dust collector for bags is equipped with several guide wheels on its pipe rack; The guide wheel cooperates with the vertical rod of the equipment support to form a vertical motion limiting and guiding mechanism.

8. A maintenance-free baghouse dust collector as described in claim 2, characterized in that, The lifting device of the bag filter external dust collector consists of a pipe frame connected to a lifting belt on the outside; the bottom of the lifting belt is fitted onto a drive pulley, which is connected to the lifting drive motor. The top of the lifting belt is fitted onto the follower pulley, which is mounted on the top of the bracket.

9. A maintenance-free baghouse dust collector as described in claim 8, characterized in that, Several lifting belts are connected to the outside of the pipe rack. Each lifting belt is supported and installed by a drive pulley and a follower pulley. Several lifting belts have their drive pulleys mounted on the same drive shaft, which is connected to the output end of the lifting drive motor.

10. A maintenance-free baghouse dust collector as described in claim 1, characterized in that, The ash removal device is an auger mechanism, including an ash inlet, an ash removal auger, an ash removal motor, and an ash removal valve; The ash inlet is connected to the bottom of the dust collection funnel; an ash discharge auger is installed below the ash inlet. One end of the ash discharge auger is connected to the output shaft of the ash discharge motor, and the other end of the ash discharge auger is the ash discharge end; An ash discharge valve is installed outside the ash discharge end.

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