Dust cleaning device of bag-type dust collector

Abstract

The utility model discloses an ash cleaning device of a bag-type dust collector, which comprises an ash cleaning device body and an ash cleaning mechanism, the ash cleaning device body comprises an ash cleaning device shell, a mounting plate is fixedly connected in the ash cleaning device shell, and a plurality of bags are mounted on the mounting plate; the ash removal mechanism comprises a gas conveying pipe, the gas conveying pipe is installed on a top wall plate of the ash removal device shell, a plurality of branch pipes are installed at the bottom of the gas conveying pipe, a rotational flow generator is installed at the lower ends of the branch pipes, and a Venturi pipe is installed at the lower end of the rotational flow generator. According to the utility model, pulse airflow is converted into a strong swirling flow field through the swirling flow generator, then secondary airflow is ejected through the Venturi tube by utilizing a negative pressure effect, and the coverage range of the swirling flow field to a cloth bag is controlled through the diversion trench, so that dust cleaning gas uniformly blows the filter bag, and the damage of the filter bag caused by direct blowing is avoided; meanwhile, the dust removal effect on the filter bag is improved, and the dust removal device is particularly suitable for removing high-viscosity dust.

Description

Technical Field

[0001] This utility model belongs to the field of dust collector cleaning technology, specifically relating to a dust collector cleaning device for bag filters. Background Technology

[0002] In the industrial and environmental protection fields, there are various types of dust removal devices. Among them, the bag filter is a dust removal device that can efficiently remove dust and recycle the filtered dust. The upper part of the bag filter housing is equipped with a pulse cleaning device. When the bag filter is working, the compressed air in the pulse cleaning device vibrates and cleans the filter bags.

[0003] When using traditional pulse jet cleaning devices, the direct injection of compressed air causes uneven stress on the filter bags, resulting in overload and damage at the bottom. At the same time, the cleaning effect on high-viscosity dust adhering to the filter bags is poor, affecting the dust removal efficiency.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a dust removal device for baghouse dust collectors, which can solve the problem of uneven force on filter bags caused by direct injection of compressed air, as well as the problem of poor dust removal effect on high-viscosity dust.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A dust removal device for a bag filter includes:

[0008] The dust removal device body includes a dust removal device housing, inside which a mounting plate is fixedly connected, and multiple filter bags are mounted on the mounting plate. The mounting plate divides the dust removal device housing into a bottom dust removal zone and a top clean air chamber, and the filter bags are used to intercept and filter dust in the flue gas.

[0009] The dust removal mechanism includes an air supply pipe installed on the top wall panel of the dust removal device housing. Multiple branch pipes are installed at the bottom of the air supply pipe, distributing the dust removal gas to these branch pipes. A vortex generator is installed at the lower end of each branch pipe, converting the pulsed airflow into a strong swirling flow field. A venturi tube is installed at the lower end of the vortex generator, using a negative pressure effect to induce secondary airflow. Specifically, a low-pressure zone is generated by the high-speed airflow at the throat, drawing in clean air from the dust collector's clean air chamber to form a secondary airflow mixture. The vortex generator and the venturi tube are coaxially connected, improving the airflow treatment effect. The lower end of the venturi tube is equipped with a flow guide shroud, which is placed inside the filter bag. The purging gas, after being processed by the cyclone generator and the flow guide shroud, is guided into the filter bag through the flow guide shroud. The cleaning gas covers the filter bag in a swirling manner, which improves the cleaning effect of the cleaning gas on the filter bag and avoids direct injection of compressed air while improving the cleaning effect on the filter bag.

[0010] In one or more embodiments of this utility model, the mounting plate has a plurality of mounting holes arranged in an array, and the plurality of cloth bags are sequentially installed in the plurality of mounting holes.

[0011] In one or more embodiments of this utility model, a plurality of branch pipes are installed through the top wall panel of the dust removal device housing, and the positions of the plurality of branch pipes correspond to the positions of the plurality of filter bags, so that dust removal gas is supplied to the filter bags through the branch pipes.

[0012] In one or more embodiments of this utility model, a pulse valve is installed on each of the multiple branch pipes, and the pulse valve is used to control the on / off state of the branch pipes.

[0013] In one or more embodiments of this utility model, the cyclone generator includes a cyclone body, an air inlet is provided on the top wall panel of the cyclone body, and the lower end of the branch pipe is installed on the air inlet so that the cleaning gas is transported to the cyclone body through the branch pipe.

[0014] In one or more embodiments of this utility model, a rotating shaft is rotatably connected within the hydrocyclone body, and a spiral guide vane is installed on the side wall of the rotating shaft. The inclination angle of the spiral guide vane is set to 45 degrees. When cleaning gas enters the hydrocyclone body, the spiral guide vane rotates under the impetus of the gas. The rotation of the spiral guide vane generates a tangential velocity component in the airflow, thereby transforming the pulsed airflow into a strong swirling field.

[0015] In one or more embodiments of this utility model, a pair of mounting rods are installed at the upper end of the rotating shaft. The ends of the pair of mounting rods away from the rotating shaft are both installed on the inner sidewall of the air inlet. The pair of mounting rods make the rotating shaft stable when it rotates.

[0016] In one or more embodiments of this utility model, the lower end of the hydrocyclone body is mounted on the air inlet of the venturi tube, and the air inlet of the flow guide is mounted on the lower outer wall of the venturi tube. This allows the cleaning gas to enter the hydrocyclone body, be transformed into a strong swirling field, and then enter the venturi tube, so that the secondary airflow can be drawn in by the negative pressure effect through the venturi tube.

[0017] In one or more embodiments of this utility model, a plurality of flow guide grooves are formed on the bottom wall panel of the flow guide hood, and the plurality of flow guide grooves are inclined in a manner that diffuses outward. The flow guide grooves enable the cleaning gas to form a high-speed airflow comb, which peels off the caked layer on the surface of the filter bag and improves the cleaning effect.

[0018] In one or more embodiments of this utility model, an air supply pipe is installed on the air inlet of the air supply pipe, and a dust removal fan is installed at the end of the air supply pipe away from the air supply pipe, through which the dust removal fan provides the gas for dust removal.

[0019] Compared with the prior art, this utility model converts pulsed airflow into a strong swirling flow field through a swirling flow generator, then uses a venturi tube to induce secondary airflow through negative pressure effect, and then controls the coverage of the swirling flow field on the filter bag through a guide groove, so that the cleaning gas blows the filter bag evenly and avoids damage to the filter bag caused by direct blowing; at the same time, it improves the cleaning effect on the filter bag, and is especially suitable for cleaning high viscosity dust. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a dust removal device for a bag filter according to one embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of a dust removal device for a bag filter according to an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of a dust removal device for a bag filter according to an embodiment of the present invention;

[0024] Figure 4 This utility model Figure 3 A schematic diagram at point A in the middle;

[0025] Figure 5 This utility model Figure 3 A schematic diagram at point B in the middle;

[0026] Figure 6 This is an exploded view of the cyclone separator in this utility model;

[0027] Figure 7 This is a schematic diagram of the guide groove on the guide shield in this utility model.

[0028] Explanation of key figure labels:

[0029] 1-Dust removal device body, 11-Dust removal device housing, 12-Mounting plate, 13-Filter bag, 2-Dust removal mechanism, 21-Air supply pipe, 22-Branch pipe, 23-Pulse valve, 24-Cyclone separator housing, 25-Air inlet, 26-Rotating shaft, 27-Spiral guide vane, 28-Mounting rod, 29-Venturi tube, 210-Guide shroud, 211-Guide groove, 212-Air supply pipe, 213-Dust removal fan. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] like Figures 1-3 As shown, a dust removal device for a bag filter according to one embodiment of the present invention includes a dust removal device body 1 and a dust removal mechanism 2.

[0032] like Figures 1-3 As shown, the dust removal device body 1 includes a dust removal device housing 11, and a mounting plate 12 is fixedly connected inside the dust removal device housing 11. Multiple filter bags 13 are installed on the mounting plate 12. The mounting plate 12 divides the dust removal device housing 11 into a dust removal area at the bottom and a clean air chamber at the top. The filter bags 13 are used to intercept and filter dust in the flue gas.

[0033] like Figure 2 and Figure 3 As shown, the mounting plate 12 has multiple mounting holes arranged in an array, and multiple cloth bags 13 are installed in the multiple mounting holes in sequence.

[0034] like Figures 1-3As shown, the dust removal mechanism 2 includes an air supply pipe 21, which is installed on the top wall panel of the dust removal device housing 11. Multiple branch pipes 22 are installed at the bottom of the air supply pipe 21, distributing the dust removal gas to the branch pipes 22. A vortex generator is installed at the lower end of each branch pipe 22, converting the pulsed airflow into a strong swirling flow field. A venturi tube 29 is installed at the lower end of the vortex generator, using the negative pressure effect to induce secondary airflow. Specifically, a low-pressure zone is generated by the high-speed airflow at the throat, drawing in clean air from the dust collector's clean air chamber to form a secondary airflow mixture. The vortex generator and the venturi tube 29 are coaxially connected, improving the airflow treatment effect. A guide shroud 210 is installed at the lower end of the venturi tube 29. The lower end of the guide shroud 210 is placed inside the filter bag 13. The purging gas, after being processed by the cyclone generator and the guide shroud 210, is guided into the filter bag 13 through the guide shroud 210. The cleaning gas covers the filter bag 13 in a cyclone manner, which improves the cleaning effect of the cleaning gas on the filter bag 13 and avoids direct injection of compressed air while improving the cleaning effect on the filter bag 13.

[0035] Preferably, in order to improve the dust removal effect of the filter bag 13, each individual filter bag 13 is provided with dust removal gas guided by the guide hood 210. When the filter bag 13 is dealing with high-viscosity dust, the dust removal effect is greatly improved after the dust removal gas is treated by the cyclone generator and the venturi tube 29, so as to improve the dust removal effect of the bag filter.

[0036] like Figure 3 and Figure 4 As shown, multiple branch pipes 22 are installed through the top wall panel of the dust removal device housing 11, and the positions of the multiple branch pipes 22 correspond to the positions of multiple filter bags 13, so that dust removal gas is supplied to the filter bags 13 through the branch pipes 22.

[0037] like Figure 3 and Figure 4 As shown, multiple branch pipes 22 are equipped with pulse valves 23, which are used to control the opening and closing of the branch pipes 22.

[0038] like Figure 4 and Figure 6 As shown, the cyclone generator includes a cyclone body 24. An air inlet 25 is provided on the top wall of the cyclone body 24. The lower end of the branch pipe 22 is installed on the air inlet 25 so that the cleaning gas can be transported into the cyclone body 24 through the branch pipe 22.

[0039] like Figure 4 and Figure 6As shown, a rotating shaft 26 is rotatably connected inside the hydrocyclone body 24. A spiral guide vane 27 is installed on the side wall of the rotating shaft 26, and the inclination angle of the spiral guide vane 27 is set to 45 degrees. The cleaning gas enters the hydrocyclone body 24, and under the impetus of the gas, the spiral guide vane 27 rotates. When the spiral guide vane 27 rotates, it causes the airflow to generate a tangential velocity component, thereby transforming the pulsed airflow into a strong swirling field.

[0040] like Figure 4 and Figure 6 As shown, a pair of mounting rods 28 are installed on the upper end of the rotating shaft 26. The ends of the pair of mounting rods 28 away from the rotating shaft 26 are both installed on the inner side wall of the air inlet 25. The pair of mounting rods 28 make the rotating shaft 26 stable when it rotates.

[0041] like Figure 5 As shown, the lower end of the hydrocyclone body 24 is installed on the air inlet of the venturi tube 29, and the air inlet of the guide shroud 210 is installed on the outer wall of the lower end of the venturi tube 29. This allows the cleaning gas to enter the hydrocyclone body 24, be transformed into a strong swirling flow field, and then enter the venturi tube 29, so that the secondary airflow can be drawn in by the negative pressure effect through the venturi tube 29.

[0042] like Figure 5 and Figure 7 As shown, multiple guide grooves 211 are provided on the bottom wall panel of the flow guide hood 210, and the multiple guide grooves 211 are inclined in a way that diffuses outward. The guide grooves 211 enable the cleaning gas to form a high-speed airflow comb, which peels off the plated layer on the surface of the filter bag and improves the cleaning effect.

[0043] like Figure 1 and Figure 2 As shown, an air supply pipe 212 is installed on the air inlet of the air supply pipe 21, and a dust removal fan 213 is installed at the end of the air supply pipe 212 away from the air supply pipe 21, through which the dust removal fan 213 provides the gas for dust removal.

[0044] It should be noted that, in order to ensure sufficient gas during dust removal, an air storage tank is installed between the dust removal fan 213 and the air supply pipe 21 to store the pulse gas. Meanwhile, the action of the pulse valve 23 is controlled by the dust collector control system, which is existing technology and will not be described in detail here.

[0045] During operation, when the bag filter is being cleaned, the control system activates the pulse valve 23, causing the cleaning gas to enter the cyclone generator through the branch pipe 22. This means the cleaning gas enters the cyclone generator body 24. As the cleaning gas flows, it drives the spiral guide vanes 27 to rotate, thus converting the pulsed airflow into a strong cyclone field. The cleaning gas then enters the venturi tube 29, where a secondary airflow is induced by the negative pressure effect. The clean gas treated by the venturi tube 29 is then transported to the guide hood 210. The guide groove 211 at the bottom of the guide hood 210 controls the coverage of the cyclone field on the filter bags, ensuring uniform cleaning and preventing damage from direct blowing. This also improves the cleaning effect on the filter bags, making it particularly suitable for cleaning high-viscosity dust.

[0046] 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.

[0047] 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 dust removal device for a bag filter, characterized in that, include: The dust removal device body includes a dust removal device housing, an installation plate is fixedly connected inside the dust removal device housing, and multiple cloth bags are installed on the installation plate; The dust removal mechanism includes an air supply pipe installed on the top wall panel of the dust removal device housing. Multiple branch pipes are installed at the bottom of the air supply pipe, and a vortex generator is installed at the lower end of each branch pipe. A venturi tube is installed at the lower end of each vortex generator, and the vortex generator and the venturi tube are coaxially connected. A flow guide is installed at the lower end of the venturi tube, and the lower end of the flow guide is placed inside a cloth bag.

2. The dust removal device for a bag filter according to claim 1, characterized in that, The mounting plate has multiple mounting holes arranged in an array, and multiple cloth bags are sequentially installed in the multiple mounting holes.

3. The dust removal device for a bag filter according to claim 2, characterized in that, Multiple branch pipes are installed through the top wall panel of the dust removal device housing, and the positions of the multiple branch pipes correspond to the positions of multiple filter bags.

4. The dust removal device for a bag filter according to claim 3, characterized in that, Each of the branch pipes is equipped with a pulse valve, which is used to control the opening and closing of the branch pipes.

5. The dust removal device for a bag filter according to claim 1, characterized in that, The cyclone generator includes a cyclone body, an air inlet is provided on the top wall panel of the cyclone body, and the lower end of the branch pipe is installed on the air inlet.

6. The dust removal device for a bag filter according to claim 5, characterized in that, The hydrocyclone body is rotatably connected to a rotating shaft, and a spiral guide vane is installed on the side wall of the rotating shaft. The inclination angle of the spiral guide vane is set to 45 degrees.

7. The dust removal device for a bag filter according to claim 6, characterized in that, A pair of mounting rods are installed at the upper end of the rotating shaft, and the ends of the mounting rods away from the rotating shaft are both installed on the inner side wall of the air inlet.

8. The dust removal device for a bag filter according to claim 7, characterized in that, The lower end of the hydrocyclone body is mounted on the air inlet of the venturi tube, and the air inlet of the flow guide is mounted on the lower outer wall of the venturi tube.

9. A dust removal device for a baghouse dust collector according to claim 8, characterized in that, The bottom wall panel of the flow guide is provided with multiple flow guide grooves, which are inclined in a way that spreads outward.

10. The dust removal device for a bag filter according to claim 1, characterized in that, An air supply pipe is installed on the air inlet of the air supply pipe, and a dust removal fan is installed at the end of the air supply pipe away from the air supply pipe.

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