Flue gas purification device for atmospheric pollution control and use method

Abstract

The application discloses a flue gas purification device for air pollution treatment and a use method, and relates to the technical field of air pollution treatment. The device comprises a purification tank, two dust blocking members, a back flushing member, a gas pump assembly and a discharge pipe. The purification tank is internally provided with an anode plate and two flue gas turbidity probes. The dust blocking member comprises a cylindrical filter bag and an inner framework, is inserted into the purification tank in parallel, and the filter bag surrounds the periphery of the cathode wire and leaves an airflow gap between the filter bag and the anode plate. The back flushing member comprises a gas pipe, a hollow pipe and a gas pressure sensor, the hollow pipe is inserted into the inner cavity of the filter bag, and the outer surface of the hollow pipe is provided with a cathode wire. When the application is used, flue gas flows through the gap between the filter bag and the anode plate, clean airflow is blown out of the filter bag to form an air curtain, dust is prevented from adhering to the cathode wire, and the dust is rapidly diffused after being charged with corona charges, so that the dust is adsorbed by the anode plate. The application effectively solves the problem that the cathode wire is easy to accumulate dust in electrostatic precipitation, thereby improving the dust removal efficiency and the operation stability of the device.

Description

Technical Field

[0001] This invention relates to the field of air pollution control technology, and in particular to a flue gas purification device and its usage method for air pollution control. Background Technology

[0002] Electrostatic precipitator technology is one of the most widely used technologies in industrial flue gas purification. It utilizes a high-voltage electric field to charge dust particles in the flue gas, which are then adsorbed by the anode plate under the action of the electric field force, achieving gas-solid separation. However, existing electrostatic precipitators have a core problem that is difficult to solve: during long-term operation, a large number of dust particles gradually adhere to the surface of the cathode wire (corona electrode), leading to a significant decrease in corona discharge intensity, and even "corona blockage," which drastically reduces the overall efficiency of electrostatic precipitator.

[0003] To address the problem of dust accumulation on cathode wires, existing technologies typically employ methods such as mechanical rapping and sonic cleaning. However, these cleaning methods have significant drawbacks: firstly, their cleaning effect is limited, making it difficult to completely remove stubborn dust from the cathode wire surface; secondly, in existing technologies, charge diffusion mainly relies on the flow of flue gas itself, resulting in slow diffusion speed and limited range. This leads to insufficient charging of dust particles far from the cathode wire, further reducing overall dust removal efficiency. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention provides a flue gas purification device for air pollution control, including a purification tank with an interior cavity. Anode plates are installed on both side walls of the cavity. A first probe and a second probe for detecting flue gas turbidity are detachably installed on one side of the purification tank. A flue gas flow pipe with controllable inlet flow is connected to the side of the bottom of the purification tank. An exhaust pipe is installed on the top of the purification tank. Two dust-blocking components are provided, both located above the flue gas flow pipe. The dust-blocking components are inserted parallel to the purification tank and penetrate the cavity. Each dust-blocking component includes a cylindrical filter bag penetrating the cavity and an internal skeleton for supporting the shape of the filter bag. The detection area of ​​the first probe is located below the lower dust-blocking component, and the detection area of ​​the second probe is located between the two dust-blocking components. A backflushing component includes an air pipe, a perforated tube, and a pressure sensor mounted on the air pipe. The perforated tube is inserted into the inner cavity of the filter bag, and a cathode wire is provided on the outer surface of the perforated tube. The filter bag surrounds the cathode wire, and a gap for flue gas flow is left between the filter bag and the two anode plates. The air pump assembly includes an air supply pump, an air outlet pipe at the air output end of the air supply pump, a pipe valve on the air outlet pipe, and the air outlet pipe is connected to the air pipe.

[0005] Preferably, a heat recovery mechanism for the flue gas flow is provided upstream of the flue gas flow pipe, and the flue gas flow pipe is equipped with an air inlet valve.

[0006] Preferably, the dust-blocking component is provided with an end cap that is sealed to the body of the purification tank, the inner frame is fixedly connected to the end cap, and the inner side of the end cap is provided with an abutment plate that abuts against the end of the hollow tube.

[0007] Preferably, a disc structure that is sealed to the purification tank body is provided at the connection position between the air pipe and the hollow pipe.

[0008] Preferably, the air pump assembly includes an air filtration mechanism connected to the air inlet of the air supply pump. The air filtration mechanism has an air inlet and a fine filter screen is provided at the air inlet.

[0009] Preferably, it also includes a dust collector, which is connected to the bottom of the purification tank and is vertically connected to the tank cavity.

[0010] Preferably, the dust collector includes a sinking cone section, a collection tank, and a diverting umbrella. The sinking cone section is connected to the tank cavity, the inside of the collection tank is a collection chamber, the bottom of the sinking cone section is provided with a collection port that communicates with the collection chamber, and the diverting umbrella is placed inside the collection chamber with its apex facing the collection port.

[0011] Preferably, a pressure relief pipe is provided on the upper side of the collection tank, which is connected to the top area of ​​the collection chamber, and a fine filter screen is installed on the pressure relief pipe.

[0012] The present invention also provides a method of using a flue gas purification device for air pollution control, comprising the following: S1. Perform preliminary pretreatment on the flue gas to be purified. S2. Allow the pretreated flue gas to enter the purification tank cavity through the flue gas flow pipe. S3. Real-time detection of flue gas turbidity in different areas of the tank cavity using the first and second probes. S4. Start the air supply pump and simultaneously energize the cathode wire. The air supply pump output airflow enters the filter bag through the air pipe and perforated pipe, then diffuses outward through the filter bag, rapidly dispersing the corona charge particles generated by the cathode wire, combining with dust particles in the flue gas, and being electrostatically adsorbed by the anode plate. S5. Adjust the gas output of the lower backflushing air pipe and the output power of the lower cathode wire based on the flue gas turbidity value detected by the first probe. S6. Adjust the gas output of the upper backflushing air pipe and the output power of the upper cathode wire based on the flue gas turbidity value detected by the second probe. S7. The purified flue gas flows upward with the outward diffusion airflow from the filter bag and exits the purification tank through the discharge pipe. S8. After a period of operation, or if the air pressure sensor of any air tube detects that the air pressure inside the air tube is continuously exceeding the standard, the pulse cleaning mode will be activated to clean the filter bag.

[0013] The sum of the real-time airflow rate injected into the tank cavity by the dust gas flow pipe and the real-time airflow rate output by the air supply pump remains at a preset constant value.

[0014] When the pulse cleaning mode is activated, both the cathode wire and the anode plate are adjusted to the preset cleaning power to complete the rapid electrostatic adsorption of dust shaken off the surface of the filter bag.

[0015] Compared with existing technologies, the beneficial effects of this invention are: This invention creates a positive pressure air curtain by placing a cylindrical filter bag around the cathode wire and coordinating with a continuously outward-diffusing clean airflow. This prevents dust particles in the flue gas from directly contacting and adhering to the cathode wire, solving the corona blockage problem caused by dust accumulation on the cathode wire in traditional electrostatic precipitators, and improving the stability and continuity of corona discharge. Simultaneously, the outward-diffusing airflow can quickly and evenly transport the corona charge particles generated by the cathode wire to various areas of the chamber, significantly improving the charging efficiency and uniformity of dust particles, allowing dust particles far from the cathode wire to be fully charged, thereby improving overall dust removal efficiency. Furthermore, this invention achieves online continuous protection and cleaning of the cathode wire, eliminating the need for frequent downtime maintenance, extending the continuous operating time of the device, and reducing operating and maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the flue gas purification device in this invention.

[0017] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0018] Figure 3 for Figure 1 A magnified structural diagram of section B in the middle.

[0019] Figure 4 This is a schematic diagram of the flue gas flow state in this invention.

[0020] Figure 5 This is a schematic diagram illustrating the state of smoke and dust collection during the fall of the present invention.

[0021] Figure 6 for Figure 5 A magnified structural diagram of part C in the middle.

[0022] Figure 7 This is a schematic diagram of the transverse cross-sectional structure of the purification tank in this invention.

[0023] Figure 8 for Figure 7 A schematic diagram of the structure of the filter bag and related internal components.

[0024] Wherein: 1-Purification tank; 11-Tank cavity; 12-First probe; 13-Second probe; 2-Cathode wire; 3-Anode plate; 4-Fluid flow pipe; 41-Inlet valve; 5-Dust collector; 51-Descending cone section; 511-Collection port; 52-Collection tank; 521-Collection chamber; 522-Pressure relief pipe; 53-Diverter umbrella; 6-Dust blocking component; 61-End cap; 62-Abutment plate; 63-Inner frame; 64-Filter bag; 7-Backflush component; 71-Air pipe; 72-Air pressure sensor; 73-Perforated pipe; 8-Air pump assembly; 81-Air supply pump; 82-Air filtration mechanism; 821-Air inlet; 83-Air outlet pipe; 84-Pipe valve; 9-Discharge pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] Example 1 This invention designs a flue gas purification device for air pollution control, with the following specific structural configuration: Combination Figure 1 , Figure 4 , Figure 5 , Figure 7 The purification tank 1 has a hollow chamber 11 inside, with anode plates 3 symmetrically arranged on both inner walls of the chamber 11. The anode plates 3 are flat and connected to the positive terminal of a high-voltage DC power supply and grounded, used to adsorb charged dust particles. A first probe 12 and a second probe 13 are detachably installed on one side wall of the purification tank 1. Both probes 12 and 13 are flue gas turbidity detection probes used to detect the flue gas turbidity in different areas of the chamber 11 in real time. A flue gas flow pipe 4 is connected to the bottom side of the purification tank 1, used to introduce the flue gas to be purified into the chamber 11. An inlet valve 41 is installed on the flue gas flow pipe 4, used to control the flow rate of flue gas entering the chamber 11 (for example, when the total output of the air supply pump increases, the inlet valve 41 reduces the amount of flue gas injected into the flue gas flow pipe 4, preventing a rapid increase in the flow rate of the discharge pipe 9. This avoids the problem of charged dust particles not being adsorbed by the anode plates 3 due to excessively high airflow velocity).

[0027] Combination Figure 1 , Figure 2 , Figure 8The purification tank 1 is equipped with two dust-blocking components 6. Both dust-blocking components 6 are located above the flue gas flow pipe 4 and are arranged parallel to each other in the vertical direction. The dust-blocking components 6 are horizontally inserted into the purification tank 1 and penetrate the entire tank cavity 11. The dust-blocking component 6 includes a cylindrical filter bag 64 and an inner frame 63. The inner frame 63 is a frame structure used to support the shape of the filter bag 64, keeping it cylindrical. The filter bag 64 is fitted over the inner frame 63, surrounding the cathode wire 2, with sufficient clearance for flue gas flow between the filter bag 64 and the anode plates 3 on both sides. The filter bag 64 is a non-filtering protective filter bag that is breathable but not dust-proof, with a permeability of 30%-50%. It is only used to form a uniform positive pressure air curtain and does not perform flue gas filtration. In other words, the function of the filter bag 64 is not to filter or allow flue gas to flow, but to act as a physical barrier, working with the airflow blown outward by the perforated tube 73 to prevent dust from directly adhering to the cathode wire 2. One end of the dust-blocking component 6 is provided with an end cap 61, which is sealed to the tank body of the purification tank 1, facilitating the overall disassembly and replacement of the dust-blocking component 6. One end of the inner frame 63 is fixedly connected to the inner side of the end cap 61.

[0028] Combination Figure 1 , Figure 2 , Figure 8 Each dust-blocking component 6 has a corresponding back-flushing component 7 inside. The back-flushing component 7 includes an air pipe 71, a perforated tube 73, and a pressure sensor 72. The perforated tube 73 is inserted into the inner cavity of the filter bag 64, and a cathode wire 2 is fixedly installed on the outer surface of the perforated tube 73. The cathode wire 2 is connected to the negative terminal of a high-voltage DC power supply to generate corona discharge and charge the dust particles. One end of the air pipe 71 is connected to one end of the perforated tube 73, and the other end of the air pipe 71 extends to the outside of the purification tank 1. A pressure sensor 72 is installed on the air pipe 71 to detect the air pressure inside the air pipe 71 in real time. An abutment plate 62 is provided on the inner side of the end cap 61, which abuts against the end of the perforated tube 73 to fix the position of the perforated tube 73. A disc structure is provided at the connection position between the air pipe 71 and the perforated tube 73, and the disc structure is sealed to the tank body of the purification tank 1 to ensure the airtightness of the tank cavity 11.

[0029] Combination Figure 1 , Figure 3 An air pump assembly 8 is externally mounted on the purification tank 1. The air pump assembly 8 includes an air supply pump 81, an air filtration mechanism 82, an air outlet pipe 83, and a valve 84. The air supply pump 81 has two gas output ends, each connected to one end of the air outlet pipe 83. A valve 84 is mounted on the air outlet pipe 83 to control the gas flow rate within it. The other end of the air outlet pipe 83 is independently connected to the air pipe 71 of a backflush unit 7. The air inlet of the air supply pump 81 is connected to the air filtration mechanism 82. The air filtration mechanism 82 has an air inlet 821 with a fine filter screen to filter the air entering the air supply pump 81, ensuring the cleanliness of the backflush airflow.

[0030] Combination Figure 1 , Figure 5 , Figure 6 The top of the purification tank 1 is connected to an exhaust pipe 9. The purified flue gas flows upward along with the airflow diffusing outward from the filter bag and is discharged through the exhaust pipe 9. A dust collector 5 is connected to the bottom of the purification tank 1, and the dust collector 5 is vertically connected to the tank cavity 11. The dust collector 5 includes a sinking cone section 51, a collection tank 52, and a diverting umbrella 53. The upper end of the sinking cone section 51 is connected to the bottom of the tank cavity 11, and a collection port 511 is provided at the bottom of the sinking cone section 51. The inside of the collection tank 52 is a collection cavity 521, and the collection port 511 is connected to the collection cavity 521. The diverting umbrella 53 is placed inside the collection cavity 521, and the apex of the diverting umbrella 53 is directly below the collection port 511. A pressure relief pipe 522 is provided on the upper side of the collection tank 52, and the pressure relief pipe 522 is connected to the top area of ​​the collection cavity 521. A fine filter screen is installed at the outlet of the pressure relief pipe 522 to balance the air pressure inside the collection cavity 521 and prevent the collected dust from escaping.

[0031] Example 2 The difference between this embodiment and Embodiment 1 is that the cathode wire 2 adopts a barbed wire structure. Multiple sharp barbs are evenly distributed on the surface of the barbed wire, enabling stronger corona discharge at lower voltages and improving the efficiency of corona charge generation. Multiple sets of air outlets are evenly distributed axially and circumferentially on the wall of the perforated tube 73, with the diameter of the outlets gradually increasing along the airflow direction. This perforation method allows the backflushing airflow to be evenly distributed within the inner cavity of the filter bag 64, ensuring consistent outward airflow velocity across all parts of the filter bag 64. This forms a uniform positive pressure air curtain around the entire cathode wire 2, achieving all-around dust protection.

[0032] Example 3 The method of using the flue gas purification device for air pollution control in this invention is as follows: Step 1: Perform preliminary pretreatment on the flue gas to be purified to remove large particulate impurities and corrosive gases.

[0033] Step 2: Open the air inlet valve 41 to allow the pretreated flue gas to enter the tank cavity 11 of the purification tank 1 through the flue gas flow pipe 4. The flue gas flows from bottom to top in the tank cavity 11.

[0034] Step 3: Activate the first probe 12 and the second probe 13 to detect the turbidity of the flue gas in the area below the lower dust blocking component 6 and between the two dust blocking components 6 inside the tank cavity 11 in real time.

[0035] Step four: Start the air supply pump 81, and simultaneously energize the anode plate 3 and the upper and lower cathode wires 2, causing corona discharge in the cathode wires 2. The clean airflow output by the air supply pump 81 enters the filter bag 64 through the air pipe 71 and the perforated pipe 73, and then diffuses outward through the pores of the filter bag 64, forming a positive pressure air curtain around the filter bag 64 to prevent dust particles in the smoke from entering the filter bag 64 and contacting the cathode wires 2. At the same time, the outward diffused airflow rapidly transports the corona charged particles generated by the cathode wires 2 to various areas of the tank cavity 11, where they fully combine with the dust particles in the upward-flowing smoke, charging the dust particles. The charged dust particles move towards the anode plates 3 on both sides under the action of the electric field force and are adsorbed by the anode plates 3.

[0036] Step 5: Based on the flue gas turbidity value detected by the first probe 12, adjust the real-time gas output of the lower backflushing component 71 via the pipe valve 84. The higher the flue gas turbidity value detected by the first probe 12, the higher the output power of the lower cathode line 2 and the higher the real-time gas output rate of the lower pipe 71, to ensure sufficient charge generation and diffusion speed.

[0037] Step Six: Based on the flue gas turbidity value detected by the second probe 13, adjust the real-time gas output of the upper backflushing component 71 via the pipe valve 84. When the flue gas turbidity value detected by the second probe 13 does not exceed the preset reference value W1, the output power of the upper cathode line 2 remains at a preset fixed value P1, and the real-time gas output rate of the upper pipe 71 remains at a preset fixed value V1 (the preset fixed values ​​P1 and V1 are sufficient to achieve corona discharge and diffusion charging effects when the flue gas turbidity does not exceed W1, that is, to maximize the electrostatic dust removal effect before the flue gas is discharged from the purification tank). When the flue gas turbidity value detected by the second probe 13 exceeds the preset reference value W1, increase the output power of the upper cathode line 2 and the real-time gas output rate of the upper pipe 71 according to the difference, to ensure that the flue gas after two stages of purification meets the emission standards.

[0038] Step 7: The purified flue gas continues to flow upward along with the airflow that diffuses outward from the filter bag 64, and is discharged through the discharge pipe 9 at the top of the purification tank 1.

[0039] Step 8: During each preset time period, or when the air pressure sensor 72 on any air tube 71 detects that the air pressure inside the air tube 71 is continuously exceeding the standard, the pulse cleaning mode is activated to clean the filter bag 64.

[0040] Step nine: In pulse cleaning mode, both valves 84 are fully open, and the air pump 81 periodically outputs pulsed airflow (output duration is a preset duration T; if the cleaning is still unsatisfactory after one cleaning, a second cleaning is performed). The pulsed airflow is rapidly blown out through the perforated tube 73, causing the filter bag 64 to generate intense pulse vibrations, shaking off the small amount of dust particles attached to the outer surface of the filter bag 64. At the same time, the cathode wire 2 and anode plate 3 are both adjusted to the preset cleaning power (e.g., 90% of their respective maximum power, or directly adjusted to their respective maximum power), completing the rapid electrostatic adsorption of the dust shaken off the surface of the filter bag 64.

[0041] In addition, although the cleaning of the anode plate 3 is not described in this invention, there are many existing methods for cleaning the anode plate 3, and any structural method that can achieve the cleaning of the anode plate 3 can be adopted.

[0042] Dust falling from the purification tank 1 falls into the sinking cone section 51 of the dust collector 5 under the action of gravity, and enters the collection chamber 521 through the collection port 511 (the pressure relief pipe 522 at the top of the collection chamber 521 balances the internal air pressure). Under the guiding action of the diversion umbrella 53, the dust falls evenly into the bottom of the collection chamber 521, preventing the dust from escaping upwards.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas purification device for air pollution control, characterized in that, include: Purification tank (1) has a tank cavity (11) inside. Anode plates (3) are provided on both sides of the tank cavity (11). A first probe (12) and a second probe (13) for detecting flue gas turbidity can be detachably installed on one side of the purification tank (1). A flue gas flow pipe (4) with controllable air intake flow is connected to the side of the bottom of the purification tank (1). An exhaust pipe (9) is installed on the top of the purification tank (1). Two dust-blocking components (6) are provided, both located above the flue gas flow pipe (4). The dust-blocking components (6) are inserted parallel to the purification tank (1) and penetrate the tank cavity (11). The dust-blocking components (6) include a cylindrical filter bag (64) penetrating the tank cavity (11) and an inner skeleton (63) for supporting the shape of the filter bag (64). The detection area of ​​the first probe (12) is located below the lower dust-blocking component (6), and the detection area of ​​the second probe (13) is located between the two dust-blocking components (6). The backflush unit (7) includes an air pipe (71), a perforated tube (73), and a pressure sensor (72) disposed on the air pipe (71). The perforated tube (73) is inserted into the inner cavity of the filter bag (64). A cathode wire (2) is provided on the outer surface of the perforated tube (73). The filter bag (64) surrounds the cathode wire (2). A gap for the flow of flue gas is left between the filter bag (64) and the anode plates (3) on both sides. The air pump assembly (8) includes an air supply pump (81), the air supply pump (81) has an air outlet pipe (83) at its gas output end, the air outlet pipe (83) is equipped with a pipe valve (84), and the air outlet pipe (83) is connected to the air pipe (71).

2. The flue gas purification device for air pollution control according to claim 1, characterized in that: A heat recovery mechanism for the flue gas flow is provided upstream of the flue gas flow pipe (4), and an air inlet valve (41) is provided on the flue gas flow pipe (4).

3. The flue gas purification device for air pollution control according to claim 1, characterized in that: The dust-blocking component (6) is provided with an end cap (61) that is sealed to the body of the purification tank (1). The inner frame (63) is fixedly connected to the end cap (61). The inner side of the end cap (61) is provided with an abutment plate (62) that abuts against the end of the hollow tube (73).

4. The flue gas purification device for air pollution control according to claim 1, characterized in that: At the connection point between the air pipe (71) and the hollow pipe (73), a disc structure is provided that is sealed to the body of the purification tank (1).

5. The flue gas purification device for air pollution control according to claim 1, characterized in that: The air pump assembly (8) includes an air filter mechanism (82) connected to the air inlet of the air supply pump (81). The air filter mechanism (82) is provided with an air inlet (821) and a fine filter screen is provided in the air inlet (821).

6. The flue gas purification device for air pollution control according to claim 1, characterized in that: It also includes a dust collector (5), which is connected to the bottom of the purification tank (1) and is vertically connected to the tank cavity (11).

7. The flue gas purification device for air pollution control according to claim 6, characterized in that: The dust collector (5) includes a sinking cone section (51), a collection tank (52), and a diversion umbrella (53); The sinking cone section (51) is connected to the tank cavity (11), the inside of the collection tank (52) is the collection cavity (521), the bottom of the sinking cone section (51) is provided with a collection port (511) connected to the collection cavity (521), the diverting umbrella (53) is placed in the collection cavity (521), and the apex of the diverting umbrella (53) is directly opposite the collection port (511). The upper side of the collection tank (52) is provided with a pressure relief pipe (522), which is connected to the top area of ​​the collection chamber (521). The pressure relief pipe (522) is equipped with a fine filter screen.

8. A method of using a flue gas purification device for air pollution control, applied to the flue gas purification device for air pollution control as described in any one of claims 1 to 7, characterized in that, Includes the following: S1. Perform preliminary pretreatment on the flue gas to be purified; S2. The pretreated flue gas enters the chamber (11) of the purification tank (1) through the flue gas flow pipe (4); S3. The turbidity of flue gas in different areas of the tank cavity (11) is detected in real time by the first probe (12) and the second probe (13); S4. Start the air supply pump (81) and simultaneously energize the cathode wire (2). The air supply pump (81) outputs airflow through the air pipe (71) and the hollow pipe (73) into the filter bag (64), and then diffuses outward through the filter bag (64). The corona charge particles generated by the cathode wire (2) are rapidly diffused outward, combined with the dust particles in the smoke and dust, and electrostatically adsorbed by the anode plate (3). S5. Based on the flue gas turbidity value detected by the first probe (12), adjust the gas output of the lower backflush component (7) air pipe (71) and the output power of the lower cathode line (2); S6. Based on the flue gas turbidity value detected by the second probe (13), adjust the gas output of the upper backflush component (7) air pipe (71) and the output power of the upper cathode line (2); S7. The purified flue gas flows upward along with the airflow that diffuses outward from the filter bag and is discharged from the purification tank (1) through the discharge pipe (9). S8. After running for a period of time, or if the air pressure sensor (72) of any air tube (71) detects that the air pressure in the air tube (71) continues to exceed the standard, the pulse cleaning mode is started to clean the filter bag (64).

9. The method of using the flue gas purification device for air pollution control according to claim 8, characterized in that: The sum of the airflow rate injected into the tank cavity (11) by the smoke and dust airflow pipe (4) and the airflow rate output by the air supply pump (81) in real time is kept at a preset constant value.

10. The method of using the flue gas purification device for air pollution control according to claim 8, characterized in that: When the pulse cleaning mode is activated, the cathode wire (2) and the anode plate (3) are both adjusted to the preset cleaning state power to complete the rapid electrostatic adsorption of dust shaken off the surface of the filter bag (64).

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