Self-cleaning pulse type cloth bag dust collector

Abstract

The utility model relates to cloth bag dust remover technical field discloses a kind of self-cleaning pulse cloth bag dust remover, including dust box and hopper, hopper is integrally connected in the bottom of dust box, horizontal plate is fixed in the inside upper portion of dust box transversely, the bottom of horizontal plate is fixed with multiple dust bags by frame vertical even opening, dust bag top and horizontal plate top are through and bottom are blocked, the top of dust bag is fixed with connecting pipe transversely, and the bottom of connecting pipe of each dust bag top is vertically connected with the spouting pipe communicated with connecting pipe. The utility model technical scheme is provided with flow pipe in the top of dust box, and the side of hopper below dust box is connected with suction tube, after pulse dust removal, gas suction pump can be sucked by suction tube, there is airflow flowing from top to bottom in the inside of dust box, it is conducive to carrying dust deposition to be collected in hopper, avoid dust to be attached to cloth bag outer surface again when carrying out cloth bag dust removal work again, guarantee the effect of pulse dust removal.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, specifically a self-cleaning pulse-jet baghouse dust collector. Background Technology

[0002] Baghouse dust collectors are devices that use filter bags to filter dust. When dust-laden gas enters, the dust is intercepted by the filter bags, and the clean gas is discharged. The dust on the filter bags is removed by pulse jet cleaning or other methods. They are characterized by high dust removal efficiency and a wide range of air volume handling capabilities. They are widely used in mining, metallurgy, chemical and other industries, and can effectively purify dust-laden waste gas and reduce dust emissions. They are commonly used equipment for industrial dust removal.

[0003] During pulse jet dust collection, the dust removed from the outer surface of the filter bags by the pulse jets remains floating throughout the interior of the dust collector. If ventilation cannot be quickly restored after dust collection to resume, the airflow will easily carry the dust back onto the outer surface of the filter bags, affecting the cleaning effect. Therefore, we propose a self-cleaning pulse jet baghouse dust collector. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning pulse-jet baghouse dust collector. By installing a flow pipe above the dust collection box and connecting an extraction pipe to the side of the ash hopper below the dust collection box, after pulse dust removal, an extraction pump can draw air through the extraction pipe. The dust collection box contains a downward-flowing airflow, which facilitates the collection of dust into the ash hopper, preventing dust from re-adhering to the outer surface of the bags during subsequent baghouse dust removal operations. This ensures the effectiveness of pulse dust removal and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A self-cleaning pulse-jet baghouse dust collector includes a dust collection box and a dust hopper. The dust hopper is integrally connected to the bottom of the dust collection box. A horizontal plate is fixed horizontally at the top of the dust collection box. Multiple dust collection bags are vertically and evenly fixed at the bottom of the horizontal plate by a frame. The top of the dust collection bags is connected to the top of the horizontal plate and the bottom is sealed. A connecting pipe is horizontally fixed above the dust collection bags. The bottom of the connecting pipe above each dust collection bag is vertically connected to a blowpipe that communicates with the connecting pipe. The end of the connecting pipe extends to the outside of the dust collection box and communicates with an air tank installed on the outer surface of the dust collection box. A pulse valve is installed on the connecting pipe above the air tank. A flow pipe communicating with the inside of the dust collection box is connected to the middle of the upper surface of the dust collection box. A first filter cartridge communicating with the inside of the flow pipe is connected to the top of the flow pipe. The top of the first filter cartridge is connected to the outside. An exhaust pipe communicating with the inside of the dust hopper is connected to the top of the side of the dust hopper. A second filter cartridge is installed at the end of the exhaust pipe. A connector communicating with the second filter cartridge is provided on the side of the second filter cartridge.

[0006] By adopting the above technical solution, after pulse dust removal, an air pump is used to draw air from the inside of the dust collector through the air extraction pipe, thereby forming an airflow that flows from top to bottom inside the dust collector. This is beneficial for carrying dust to settle in the dust hopper and collecting it, thus preventing floating dust from re-adhering to the outer surface of the dust collector bag when the bag dust collector is restarted, which would affect the dust removal effect.

[0007] Optionally, filter cotton is embedded and fixed inside both the first and second filter cylinders, and the filter cotton fills the interior of the first and second filter cylinders.

[0008] By adopting the above technical solution, the purpose of filtering dust is achieved by using the filter cotton inside the first and second filter cartridges.

[0009] Optionally, the suction pipe is inclined, and the height of the end of the suction pipe near the ash hopper is less than the height of the other end.

[0010] By adopting the above technical solution, dust accumulation in the air extraction pipe on the side of the filter cartridge can be avoided.

[0011] Optionally, the bottom of the ash hopper is provided with a dust discharge port, which is connected to the bottom of the ash hopper.

[0012] By adopting the above technical solution, the dust accumulated in the ash hopper can eventually be discharged from the dust outlet.

[0013] Optionally, an electrically controlled valve is installed on the flow pipe below the first filter cartridge, and the electrically controlled valve is connected to the flow pipe.

[0014] By adopting the above technical solution, during normal bag filter dust collection, the electrically controlled valve can be closed to prevent the air from the purification port from being discharged from the circulation pipe.

[0015] Optionally, a gas source pipe is connected to the side of the gas tank, and the gas source pipe is connected to the gas tank.

[0016] By adopting the above technical solution, the compressed air pipeline is connected to the air source pipe to supply compressed air into the air tank.

[0017] Optionally, the dust collector is connected to an air inlet pipe communicating with its interior on the lower side, and an air outlet pipe communicating with its interior is connected to the dust collector on the upper side of the horizontal plate.

[0018] By adopting the above technical solution, the dust-laden exhaust gas enters from the lower inlet pipe, is purified and dust-removed, and is discharged from the upper outlet pipe.

[0019] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0020] 1. The technical solution of this application has a flow pipe installed above the dust collector and an exhaust pipe connected to the side of the ash hopper below the dust collector. After the pulse dust removal is completed, the exhaust pump can extract air through the exhaust pipe. There is an airflow from top to bottom inside the dust collector, which is conducive to carrying dust to the ash hopper for collection. This avoids dust from adhering to the outer surface of the filter bag again when bag dust removal is performed again, thus ensuring the effect of pulse dust removal.

[0021] 2. The technical solution of this application prevents external air from entering the clean air area above the dust collector by installing filter cartridges on both the flow pipe and the exhaust pipe, and also prevents dust below the dust collector from being drawn out from the exhaust pipe. Furthermore, the exhaust pipe is set at an angle to prevent dust from accumulating in the exhaust pipe on the side of the filter cartridge. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the self-cleaning pulse bag dust collector of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the dust collector box of the self-cleaning pulse bag filter of this utility model.

[0025] In the diagram: 1. Dust collector; 11. Inlet pipe; 12. Outlet pipe; 2. Dust hopper; 21. Dust discharge port; 3. Horizontal plate; 4. Dust collector bag; 5. Connecting pipe; 51. Pulse jet pipe; 52. Pulse valve; 53. Air tank; 531. Air source pipe; 6. Flow pipe; 61. Electrically controlled valve; 62. First filter cartridge; 7. Extraction pipe; 71. Second filter cartridge; 8. Filter cotton. Detailed Implementation

[0026] Please see Figure 1-2This utility model provides a technical solution: a self-cleaning pulse-jet bag filter, including a dust collection box 1 and a dust hopper 2. The dust hopper 2 is integrally connected to the bottom of the dust collection box 1. In use, the dust collection box 1 and the dust hopper 2 are installed together by a bracket. A horizontal plate 3 is fixed horizontally at the top inside the dust collection box 1. Multiple dust collection bags 4 are vertically and evenly fixed at the bottom of the horizontal plate 3 by a frame. The top of the dust collection bags 4 is connected to the top of the horizontal plate 3 and the bottom is sealed. An air inlet pipe communicating with the interior is connected to the lower side of the dust collection box 1. 11. The side of the dust collector 1 above the horizontal plate 3 is connected to the air outlet pipe 12, which communicates with the interior of the dust collector 1. When in use, the air inlet pipe 11 is connected to the exhaust gas pipe, so that the dust-laden exhaust gas enters the dust collector 1 from the air inlet pipe 11. When it flows upward, it is filtered by the dust collector bag 4. The dust remains on the outside of the dust collector bag 4, while the purified air flows into the inside of the dust collector bag 4 and flows out from the air outlet after reaching the top of the horizontal plate 3. The heavier dust in the exhaust gas will fall into the dust hopper 2 due to gravity between passing through the dust collector bag 4.

[0027] A connecting pipe 5 is horizontally fixed above the dust collection bag 4. The bottom of the connecting pipe 5 above each dust collection bag 4 is vertically connected to a blow pipe 51 that communicates with the connecting pipe 5. The end of the connecting pipe 5 extends to the outside of the dust collection box 1 and communicates with the air tank 53 installed on the outer surface of the dust collection box 1. A pulse valve 52 is installed on the connecting pipe 5 above the air tank 53. An air source pipe 531 is connected to the side of the air tank 53 and communicates with the air tank 53. When in use, the air source pipe 531 is connected to the compressed air pipeline. When a certain amount of dust accumulates on the outside of the dust collection bag 4 and self-cleaning is required, the exhaust gas is first stopped from being introduced into the dust collection box 1. The pulse valves 52 on different connecting pipes 5 are opened alternately, so that the compressed air alternately enters into different connecting pipes 5 and blows out from the blow pipe into the dust collection bag 4 below. The high-pressure airflow forms a shock wave and carries the induced airflow into the dust collection bag 4, causing the dust collection bag 4 to expand and vibrate instantly. The dust attached to the surface falls off due to inertia and the reverse action of the airflow and falls into the ash hopper 2.

[0028] After the above dust removal process, a lot of dust will float inside the dust collector 1. If the exhaust gas is directly introduced for dust removal at this time, the airflow will cause the dust to re-attach to the outer surface of the dust collector 4, affecting the cleaning effect on the filter bag. The dust on the outer surface of the filter bag needs to be cleaned again in a short time, but the time for the dust to settle naturally is relatively long, making it impossible to continue the exhaust gas dust removal work.

[0029] To solve the above problems, a flow pipe 6 is connected to the middle of the upper surface of the dust collector 1, communicating with its interior. A first filter cartridge 62, communicating with its interior, is connected above the flow pipe 6, and the upper part of the first filter cartridge 62 is connected to the outside. An electrically controlled valve 61 is installed on the flow pipe 6 below the first filter cartridge 62, and the electrically controlled valve 61 is connected to the flow pipe 6. An exhaust pipe 7, communicating with its interior, is connected to the upper side of the ash hopper 2, and a second filter cartridge 71 is installed at the end of the exhaust pipe 7. A connector is provided on the side of the second filter cartridge 71, communicating with it. Filter cotton 8 is embedded and fixed inside both the first filter cartridge 62 and the second filter cartridge 71, and the filter cotton 8 fills the interior of the first filter cartridge 62 and the second filter cartridge 71.

[0030] In use, the extraction pipe 7 is connected to the extraction pump. During normal exhaust gas dust removal, the electric control valve 61 is kept closed. Since the extraction pump pipeline has a check valve, it can prevent the gas inside the dust collector 1 from flowing out from the flow pipe 6 or the extraction pipe 7. Only after the pulse dust removal ends, the electric control valve 61 is opened and the extraction pump connected to the extraction pipe 7 is started. The outside air enters the dust collector 1 after being filtered by the filter cotton 8 inside the first filter cartridge 62, forming an airflow from top to bottom, which carries the dust and finally deposits it into the ash hopper 2. Then, the electric control valve 61 is closed and the extraction pump is stopped. After the dust settles quickly, dust-laden exhaust gas can be immediately introduced into the dust collector 1 for dust removal. The extraction pipe 7 is set at an angle, and the height of the end of the extraction pipe 7 near the ash hopper 2 is less than the height of the other end, which can prevent dust from accumulating in the extraction pipe 7 on the side of the second filter cartridge 71.

[0031] The bottom of the ash hopper 2 is provided with a dust discharge port 21, which is connected to the bottom of the ash hopper 2. Before use, a butterfly valve is installed on the dust discharge port 21. When using the dust collection bag 4 to treat the exhaust gas, the butterfly valve is kept closed. After a large amount of dust accumulates in the ash hopper 2, the butterfly valve is opened to discharge the accumulated dust.

[0032] In use, the dust collector 1 is supported and installed by a bracket, with the exhaust pipe connected to the inlet pipe 11 and the outlet pipe 12 connected to the exhaust pipe for purified air. A butterfly valve is installed below the dust outlet 21, connecting the suction pipe 7 to the suction pump, and the air source pipe 531 connected to compressed air. The pulse valve 52 and the electrically controlled valve 61 are both connected to the industrial control computer. During dust removal, the dust-laden exhaust gas enters the dust collector 1 from the inlet pipe 11. Large dust particles fall directly into the dust hopper 2 due to gravity. As the dust-laden exhaust gas flows upward, the dust is filtered and retained on the outer surface of the dust collector bag 4. Clean air flows through the dust collector bag 4 to the top of the horizontal plate 3 and finally flows out to the outside from the outlet pipe 12. When pulse dust removal is required, first stop the supply of exhaust gas into the dust collector 1, and alternately open the pulse valves 52 on different connecting pipes 5, so that compressed air alternately enters into different connecting pipes 5 and blows out from the nozzle into the dust collector bag 4 below. The high-pressure airflow forms a shock wave and carries the induced airflow into the dust collector bag 4, causing the dust collector bag 4 to expand and vibrate instantly. The dust adhering to the surface falls off due to inertia and the reverse action of the airflow and falls into the ash hopper 2. After the pulse valve 52 finishes working, a large amount of dust will float inside the dust collector 1. At this time, open the electric control valve 61 and start the suction pump connected to the suction pipe 7. The external air enters the dust collector 1 after being filtered by the filter cotton 8 inside the first filter cartridge 62, forming an airflow from top to bottom, which carries the dust and finally deposits it into the ash hopper 2. After stopping the suction pump and closing the electric control valve 61, the bag dust removal work can continue. When there is a certain amount of dust in the ash hopper 2, the butterfly valve can be opened to allow the dust to be discharged from the dust outlet 21, and then the butterfly valve is closed again.

Claims

1. A self-cleaning pulse-jet bag filter, comprising a dust collection box (1) and a dust hopper (2), wherein the dust hopper (2) is integrally connected to the bottom of the dust collection box (1), a horizontal plate (3) is horizontally fixed at the top inside the dust collection box (1), and a plurality of dust collection bags (4) are vertically and evenly supported at the bottom of the horizontal plate (3) by a frame, wherein the top of the dust collection bags (4) is connected to the top of the horizontal plate (3) and the bottom is sealed, characterized in that: A connecting pipe (5) is fixed horizontally above the dust collection bag (4). The bottom of the connecting pipe (5) above each dust collection bag (4) is vertically connected to a blow pipe (51) that communicates with the connecting pipe (5). The end of the connecting pipe (5) extends through to the outside of the dust collection box (1) and communicates with the air tank (53) installed on the outer surface of the dust collection box (1). A pulse valve (52) is installed on the connecting pipe (5) above the air tank (53). The dust collector (1) has a flow pipe (6) connected to its interior at the middle position of its upper surface. A first filter cylinder (62) connected to its interior is connected above the flow pipe (6), and the first filter cylinder (62) is connected to the outside. An exhaust pipe (7) connected to its interior is connected above the side of the ash hopper (2), and a second filter cylinder (71) is installed at the end of the exhaust pipe (7). A connector connected to the second filter cylinder (71) is provided on its side.

2. The self-cleaning pulse-jet bag filter according to claim 1, characterized in that: The first filter cylinder (62) and the second filter cylinder (71) are both embedded with filter cotton (8), and the filter cotton (8) fills the interior of the first filter cylinder (62) and the second filter cylinder (71).

3. The self-cleaning pulse-jet bag filter according to claim 1, characterized in that: The suction pipe (7) is set at an angle, and the height of the end of the suction pipe (7) near the ash hopper (2) is less than the height of the other end.

4. The self-cleaning pulse-jet bag filter according to claim 1, characterized in that: The bottom of the ash hopper (2) is provided with a dust discharge port (21), which is connected to the bottom of the ash hopper (2).

5. The self-cleaning pulse-jet bag filter according to claim 1, characterized in that: An electrically controlled valve (61) is installed on the flow pipe (6) below the first filter cartridge (62), and the electrically controlled valve (61) is connected to the flow pipe (6).

6. The self-cleaning pulse-jet bag filter according to claim 1, characterized in that: The gas tank (53) is connected to a gas source pipe (531) on its side, and the gas source pipe (531) is connected to the gas tank (53).

7. The self-cleaning pulse-jet bag filter according to claim 1, characterized in that: The dust collector (1) is connected to an air inlet pipe (11) that communicates with its interior on the lower side, and the dust collector (1) is connected to an air outlet pipe (12) that communicates with its interior on the upper side of the horizontal plate (3).

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