An improved pulse bag filter

Abstract

This utility model discloses an improved pulse bag filter, including a dust collection box; the dust collection box includes a pulse box, a bag box, and a dust hopper connected sequentially from top to bottom; a barrel-shaped frame and a barrel-shaped filter bag are arranged inside the bag box, a blowing funnel is set at the upper end of the barrel-shaped frame, the lower end of the barrel-shaped frame is fitted onto the upper end of a spring, the lower end of the spring is covered by an end cap, the blowing funnel is installed in the mounting hole, the barrel-shaped filter bag is fitted onto the outer periphery of the barrel-shaped frame, the bag mouth of the barrel-shaped filter bag is connected to the outer edge of the blowing funnel, and the inner bottom of the barrel-shaped filter bag is tightly attached to the end cap; the barrel-shaped frame structure is uniquely adjusted by adding a spring between the barrel-shaped frame and the end cap. After the dust removal controller issues a dust removal command, compressed air instantly causes the filter bag to expand, and the bottom of the filter bag is quickly lifted and impacts the end cap. Due to the spring, this impact force is buffered and absorbed by the spring, weakening the force between the filter bag and the end cap, and significantly extending the service life of the filter bag.

Description

Technical Field

[0001] This utility model relates to dust removal technology, and in particular to an improved pulse bag filter. Background Technology

[0002] Pulse jet bag filter is a high-efficiency air purification device. It adopts compartment-based pulse jet cleaning technology, which has the characteristics of strong cleaning ability, high dust removal efficiency and low emission concentration.

[0003] The working principle of a pulse jet baghouse dust collector is as follows: After the dust-laden gas enters the dust collector, due to the rapid expansion of the gas volume, some of the coarser dust particles fall into the ash hopper due to inertia or natural settling, while most of the remaining dust particles rise with the airflow and enter the filter bags. After being filtered by the filter bags, the dust particles are retained on the outside of the filter bags. The purified gas enters the pulse box from the inside of the filter bags and is then discharged into the atmosphere through the exhaust port. When the dust on the surface of the filter bags continues to increase, causing the equipment resistance to rise to the set value, the dust removal controller issues a dust removal command, opening the pulse valves one by one, so that compressed air is sprayed through the nozzles to clean the filter bags. This causes the filter bags to suddenly expand, and under the action of the reverse airflow, the dust attached to the surface of the filter bags quickly falls off and into the ash hopper. The dust is discharged by the unloader. After all the filter bags have been cleaned by the pulse jet, the dust collector returns to normal operation.

[0004] During this process, the bag is frequently inflated, and the rapidly expanding bag will shrink inward axially. The bottom of the bag frequently hits the bottom of the frame, resulting in an extremely high damage rate of the bag. Utility Model Content

[0005] The purpose of this invention is to provide an improved pulse bag filter. It innovatively adjusts the barrel-shaped frame structure by adding a spring between the barrel-shaped frame and the end cap. The inner bottom of the barrel-shaped filter bag is also tightly attached to the end cap. After the dust removal controller issues a dust removal command, compressed air instantly expands the filter bag, and the bottom of the filter bag is quickly lifted and impacts the end cap. Due to the spring, this impact force is buffered and absorbed by the spring, weakening the force between the filter bag and the end cap, and significantly extending the service life of the filter bag.

[0006] To achieve the above objectives, this utility model provides an improved pulse bag dust collector, which includes a dust collection box, a pulse jet cleaning system, a discharger, and a dust collection fan.

[0007] The dust collector box includes a pulse jet box, a bag filter box, and a dust hopper connected sequentially from top to bottom. A mounting plate is welded inside the pulse jet box, and the mounting plate has an array of mounting holes on its surface. An exhaust port is opened on the side wall of the pulse jet box. The air inlet of the dust collector fan is connected to the exhaust port via a pipe. The pulse jet cleaning system includes a cleaning controller and several jet rods. The cleaning controller is installed on the outside of the pulse jet box. The outer end of each jet rod is connected to the cleaning controller, and its inner end extends into the inner cavity of the pulse jet box. A pulse valve is connected in series on each jet rod. The control signal output terminal of the cleaning controller is connected to the control terminal or drive terminal of the pulse valve. Several nozzles are evenly distributed on the side wall of each jet rod, and each nozzle points downwards towards its corresponding mounting hole. The side wall of the dust hopper is provided with a dust-laden gas inlet pipe, and the lower end of the dust hopper is provided with a dust discharge port. The unloader is installed at the dust discharge port.

[0008] The bag box contains several barrel-shaped frames and barrel-shaped bags. A blow-off funnel is provided at the upper end of the barrel-shaped frame. The lower end of the barrel-shaped frame is fitted onto the upper end of a spring. The lower end of the spring is covered by an end cap. The blow-off funnel is installed in the mounting hole. The barrel-shaped bags are fitted around the outer periphery of the barrel-shaped frame. The opening of the barrel-shaped bags is connected to the outer edge of the blow-off funnel. The inner bottom of the barrel-shaped bags is tightly attached to the end cap.

[0009] Furthermore, this utility model provides an improved pulse bag filter, wherein the barrel-shaped frame includes several rings and several steel wires, the steel wires are arranged in a ring array, the rings are spaced apart and sleeved on the outer periphery of the steel wires, the rings and the steel wires are welded together, and the upper end of the spring is connected to the inner ring of the steel wire.

[0010] Furthermore, this utility model provides an improved pulse bag filter, wherein each of the steel wires and the spring has at least two welding points.

[0011] Furthermore, this utility model provides an improved pulse bag dust collector, wherein a manual cleaning port is provided on the side wall of the ash hopper.

[0012] This invention has the following advantages over the prior art:

[0013] On the one hand, the original design adjusts the barrel-shaped frame structure by adding a spring between the barrel-shaped frame and the end cap. The inner bottom of the barrel-shaped bag is also tightly attached to the end cap. After the dust removal controller issues the dust removal command, the compressed air instantly expands the bag, and the bottom of the bag quickly rises and impacts the end cap. Due to the spring, this impact force is buffered and absorbed by the spring, weakening the force between the bag and the end cap, and significantly extending the service life of the bag. On the other hand, in order to prevent the end cap from undergoing significant radial vibration under the compression of the bag, this invention welds at least two points between each steel wire and the spring, which improves the connection strength and significantly suppresses the radial vibration of the spring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an improved pulse bag filter according to the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the filter bag box in an improved pulse bag dust collector according to this utility model.

[0016] Figure 3 This is a schematic diagram of the barrel-shaped frame and barrel-shaped filter bag structure in an improved pulse bag dust collector according to this utility model.

[0017] Figure 4 for Figure 3 Enlarged view of a specific area.

[0018] The components include: 1. Unloader; 2. Dust collector fan; 3. Pulse box; 4. Bag hopper; 5. Dust hopper; 6. Mounting plate; 7. Mounting hole; 8. Exhaust outlet; 9. Pipeline; 10. Dust removal controller; 11. Pulse jet bar; 12. Dust-laden gas inlet pipe; 13. Manual dust removal port; 14. Barrel-shaped filter bag; 15. Pulse jet funnel; 16. Spring; 17. End cap; 18. Ring; 19. Steel wire; 20. Pulse valve. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and 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 are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0022] like Figures 1-4 As shown, this embodiment provides an improved pulse bag filter, which includes a dust collection box, a pulse jet cleaning system, a discharger 1, and a dust collection fan 2;

[0023] The dust collector box includes a pulse jet box 3, a bag filter box 4, and a dust hopper 5 connected sequentially from top to bottom; a mounting plate 6 is welded inside the pulse jet box 3, and a plurality of mounting holes 7 are arrayed on the surface of the mounting plate 6; an exhaust port 8 is opened on the side wall of the pulse jet box 3; the air inlet of the dust collector fan 2 is connected to the exhaust port 8 through a pipe 9; the pulse jet cleaning system includes a dust removal controller 10 and a plurality of jet rods 11, the dust removal controller 10 is installed on the outside of the pulse jet box 3, and the outer end of the jet rod 11 is connected to the dust removal controller 10. The controller 10 extends into the inner cavity of the pulse box 3. A pulse valve 20 is connected in series on the blow rod 11. The control signal output terminal of the dust removal controller 10 is connected to the control terminal or drive terminal of the pulse valve 20. Several nozzles are provided in the side wall of each blow rod 11, and each nozzle points downward to a corresponding mounting hole 7. The side wall of the ash hopper 5 is provided with a dust-laden gas inlet pipe 12 and a manual dust removal port 13. The lower end of the ash hopper 5 is provided with an ash discharge port, and the unloader 1 is installed at the ash discharge port.

[0024] The bag box 4 contains several barrel-shaped frames and barrel-shaped bags 14. Each barrel-shaped frame has a blow-drilling funnel 15 at its upper end and a spring 16 at its lower end. The lower end of the spring 16 is covered by an end cap 17. The blow-drilling funnel 15 is installed in the mounting hole 7. The barrel-shaped bags 14 are fitted around the outer periphery of the barrel-shaped frames. The opening of the barrel-shaped bags 14 is connected to the outer edge of the blow-drilling funnel 15. The inner bottom of the barrel-shaped bags 14 is in close contact with the end cap 17.

[0025] The barrel-shaped frame includes several rings 18 and several steel wires 19. The steel wires 19 are arranged in a circular array, and the rings 18 are spaced apart and fitted around the outer periphery of the steel wires 19. The rings 18 and the steel wires 19 are welded together. The upper end of the spring 16 is connected to the inner ring of the steel wire 19. Figure 3 and Figure 4 As shown, in order to enhance the connection strength and suppress radial vibration, there are at least two welding points between each of the steel wires 19 and the spring 16.

[0026] The improved pulse bag filter in this embodiment has the following usage method and principle:

[0027] Dust-laden gas enters the dust hopper 5 through the dust-laden gas inlet pipe 12. Due to the rapid expansion of the gas volume, some of the coarser dust particles fall to the bottom of the dust hopper 5 due to inertia or natural settling. Most of the remaining dust particles rise with the airflow and enter the baghouse 4. After being filtered by numerous barrel-shaped filter bags 14, the dust particles are retained on the outside of the barrel-shaped filter bags 14. The purified gas enters the pulse jet box 3 from inside the barrel-shaped filter bags 14 and is then discharged into the atmosphere through the exhaust port 8. As the dust on the surface of the barrel-shaped filter bags 14 continuously increases, the pressure tester installed on the pipe 9 continuously increases the value measured. The signal output terminal of the pressure tester is connected to the dust removal controller 10, which feeds back the pressure value to the dust removal controller 10 in real time. When the resistance value rises to the set value, the dust removal controller 10 issues a dust removal command, opening the pulse jets one by one. The valve 20 causes compressed air to be sprayed through the nozzle to clean the filter bags, causing the barrel-shaped filter bags 14 to suddenly expand. Under the action of the reverse airflow, the dust attached to the surface of the filter bags quickly falls into the dust hopper 5. The dust is discharged by the unloader 1. After all the barrel-shaped filter bags 14 have been cleaned by the spraying, the dust collector resumes normal operation. When the barrel-shaped filter bags 14 suddenly expand, there will be a strong upward force on the inner bottom of the barrel-shaped filter bags 14. This force forces the inner bottom of the barrel-shaped filter bags 14 to hit the end cap 17. Under frequent impact, the bottom of the barrel-shaped filter bags 14 will be damaged. This utility model adds a spring 16 between the end cap 17 and the frame. The spring 16 absorbs the impact force, that is, the impact is significantly mitigated when the barrel-shaped filter bags 14 are lifted, which greatly extends the service life of the barrel-shaped filter bags 14.

[0028] Any aspects not described in detail in this utility model are well-known technologies to those skilled in the art. For example, the dust removal controller 10 uses a well-known solution implemented using an MCU or PLC in the prior art.

[0029] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An improved pulse baghouse filter characterized in that, Includes a dust collection box, a pulse jet cleaning system, a discharger (1), and a dust collection fan (2); The dust collection box includes a pulse box (3), a bag box (4), and a dust hopper (5) connected sequentially from top to bottom; a mounting plate (6) is welded inside the pulse box (3), and the mounting plate (6) has several mounting holes (7) arrayed on its surface; an exhaust port (8) is opened on the side wall of the pulse box (3); the air inlet of the dust collector fan (2) is connected to the exhaust port (8) through a pipe (9); the pulse jet cleaning system includes a dust removal controller (10) and several jet rods (11), the dust removal controller (10) is installed on the outside of the pulse box (3), and the jet rods (11) are installed on the outside of the pulse box (3). The end is connected to the dust removal controller (10), and the inner end extends into the inner cavity of the pulse box (3). The pulse valve (20) is connected in series on the blow rod (11). The control signal output end of the dust removal controller (10) is connected to the control end or drive end of the pulse valve (20). Several nozzles are evenly distributed on the side wall of each blow rod (11), and each nozzle points downward to the corresponding mounting hole (7). The side wall of the ash hopper (5) is provided with a dust-laden gas inlet pipe (12). The lower end of the ash hopper (5) is provided with an ash discharge port. The unloader (1) is installed at the ash discharge port. The bag box (4) is provided with several barrel-shaped frames and barrel-shaped bags (14). The upper end of the barrel-shaped frame is provided with a blow-drilling funnel (15). The lower end of the barrel-shaped frame is sleeved on the upper end of the spring (16). The lower end of the spring (16) is covered with an end cap (17). The blow-drilling funnel (15) is installed in the mounting hole (7). The barrel-shaped bag (14) is sleeved on the outer periphery of the barrel-shaped frame. The bag mouth of the barrel-shaped bag (14) is connected to the outer edge of the blow-drilling funnel (15). The inner bottom of the barrel-shaped bag (14) is tightly attached to the end cap (17).

2. The improved pulse baghouse according to claim 1, wherein, The barrel-shaped frame includes several rings (18) and several steel wires (19). The steel wires (19) are arranged in a ring array. The rings (18) are spaced apart and sleeved on the outer periphery of the steel wires (19). The rings (18) and the steel wires (19) are welded together. The upper end of the spring (16) is connected to the inner ring of the steel wires (19).

3. The improved pulse baghouse according to claim 2, wherein, There are at least two welding points between each of the steel wires (19) and the spring (16).

4. The improved pulse baghouse according to claim 1, wherein, The ash hopper (5) has a manual ash removal port (13) on its side wall.

Images