Anode cleaning system and cleaning method for radial flow type wet electric precipitator

Abstract

The invention provides an anode cleaning system for a radial-flow wet-type electric dust remover. The anode cleaning system comprises a cleaning placement frame and a cleaning device, wherein the cleaning placement frame is over against a screen plate of the electric dust remover; the liquid conveying pipeline is arranged on the cleaning placement frame; the ultrasonic atomizing nozzle, the pulse nozzle and the wide-angle nozzle are distributed on the liquid conveying pipeline; the water tank, the alkali liquor tank and the acid liquor tank are connected with the liquid conveying pipeline; the electric control valve and the booster pump are arranged on the liquid conveying pipeline; and the controller is electrically connected with the electric control valve and the booster pump. The invention further provides a cleaning method of the anode cleaning system for the radial flow type wet electric precipitator. According to the cleaning method of the anode cleaning system for the radial flow type wet electric dust remover, the internal adhesiveness of dirt is destroyed through the processes of softening, alkali washing and acid washing, and compared with a screen plate of a direct high-pressure washing electric dust remover, the water consumption and the washing pressure are remarkably reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrostatic precipitator cleaning, and in particular to an anode cleaning system and a cleaning method for a radial wet electrostatic precipitator. Background Art

[0002] Electrostatic precipitators (ESPs) are used to remove dust from flue gas in power plants. After entering the dust collection duct, dust-laden gas first passes through a radial ESP discharge grid. A high-voltage DC power supply creates a potential difference of over 20,000 volts between the discharge grid and the collecting electrode mesh behind it, ionizing the air around the grid and generating a large number of electrons and ions. Dust particles in the dust-laden gas are charged negatively as they pass through the grid. The charged gas then flows through a circular collection chain, which is composed of multiple porous foam metal sheets (or corrugated sheets, honeycomb panels, etc.), parallel to the discharge grid. Because the collecting electrode mesh is positively charged, the charged dust particles are attracted to the mesh surface by the electric field, achieving gas-solid separation. ESPs require regular cleaning of the dust layer on the mesh surface, otherwise it will affect the dust removal efficiency. ESP cleaning methods include dry and wet methods. Dry methods generally use vibration or soot blowing, while wet methods use high-pressure water flushing.

[0003] Due to the fluctuating load on the power grid, the amount of dust generated also fluctuates. This results in a fluctuating rate of dust accumulation on the surface of the electrostatic precipitator. The main components of particulate matter in flue gas include carbon black, oxides (such as silicon dioxide, aluminum oxide, iron oxide, and calcium oxide), silicates, and organic matter. These substances, under the action of electric charges, easily form colloids and adhere to the screen surface. If dust is not cleaned promptly, some of the dirt adhering to the screen is difficult to remove, creating an electric field shielding effect that impairs the cleaning efficiency of the electrostatic precipitator. To completely remove the dust layer from the screen surface, either increase the cleaning frequency, extend the cleaning time, or increase the flushing pressure. Generally, increasing the flushing pressure is used to clean the dust layer from the screen surface. This method consumes a large amount of water and causes significant wear and tear on the flushing nozzles and pipes, which can easily lead to pipe and nozzle damage. Summary of the Invention

[0004] In view of this, it is necessary to propose an anode cleaning system for radial flow wet electrostatic precipitator to reduce the flushing pressure and reduce water consumption.

[0005] The present application also provides a cleaning method based on the above-mentioned anode cleaning system for a radial wet electrostatic precipitator, which reduces flushing pressure and reduces water consumption.

[0006] An anode cleaning system for a radial flow wet electrostatic precipitator comprises: A cleaning rack directly opposite to the screen plate of the electrostatic precipitator; An infusion pipeline arranged on a cleaning placement rack; Ultrasonic atomizing nozzles, pulse nozzles, and wide-angle nozzles distributed on the infusion pipeline; Water tanks, alkali tanks and acid tanks connected to the liquid infusion pipelines; Electric control valves and booster pumps installed on the infusion pipeline; A controller electrically connected to the electronically controlled valve and the booster pump.

[0007] In order to facilitate adjustment of the cleaning position, preferably, the cleaning placement rack includes a lifting motor; A reducer, wherein the power input shaft of the reducer is connected to the rotating shaft of the lifting motor, and the reducer is provided with two power output shafts; a transmission shaft, one end of which is connected to the power output shaft; A worm gear mechanism, wherein the worm of the worm gear mechanism is connected to the other end of the transmission shaft; a lead screw connected to the worm gear of the worm gear mechanism; a nut guide rail, wherein the nut guide rail is threadedly connected to the lead screw; The lifting shell, the lead screw and the nut guide rail are located in the lifting shell, the nut guide rail drives the lifting shell to rise and fall, and the upper end of the lifting shell is connected to the infusion pipeline.

[0008] Preferably, the liquid infusion pipeline includes a shunt pipeline, the shunt pipeline is provided with three liquid inlets, the three liquid inlets are respectively connected to the water tank, the alkali liquid tank, and the acid liquid tank, and the outflow of water, alkali liquid or acid liquid is controlled by an electrically controlled valve, and the shunt pipeline is provided with a liquid outlet, which is connected to the liquid inlet of the booster pump; A confluence pipe connected to the liquid outlet of the booster pump; A rotating pipe connected to the confluence pipe via a rotating joint; A four-way interface located at the end of the rotating pipe; Atomizing nozzle pipes, pulse nozzle pipes, and wide-angle nozzle pipes connected to the four-way interface; An electric control valve is respectively provided on the atomizing nozzle pipe, the pulse nozzle pipe and the wide-angle nozzle pipe; In conjunction with the self-rotating pipe, the anode cleaning system for the radial wet electrostatic precipitator further includes a rotating motor, and the rotating shaft of the rotating motor and the self-rotating pipe are driven by gears.

[0009] Preferably, the wide-angle nozzle is a duckbill nozzle.

[0010] A cleaning method for an anode cleaning system of a radial flow wet electrostatic precipitator comprises the following steps: Step 1: Use clean water with an ultrasonic atomizing nozzle to soften the dirt on the surface of the stencil; Step 2: Use a pulse nozzle to rinse the stencil surface with lye; Step 3: using pulse nozzle to clean the residual lye in the pipe and the surface of the mesh plate with clean water; Step 4: using pulse nozzle to flush the surface of the mesh plate with acid solution; Step 5: using wide-angle nozzle to flush the surface of the mesh plate with clean water.

[0011] Preferably, in step 1, the output of the ultrasonic atomizing nozzle is 0.2-0.5 L / min, and the flushing time is 10-15 min.

[0012] Preferably, in step 2, the lye is a sodium hydroxide solution with a concentration of 1%-1.5%, and the flushing time is 15-20 min.

[0013] Preferably, in step 4, the acid solution is a hydrochloric acid solution with a concentration of 2%-3%, and the flushing time is 10-15 min.

[0014] Preferably, in step 2, step 3 or step 4, the single spraying duration of the pulse nozzle is 80-120 ms, the time interval is 5 s, and the spraying pressure is 15-30 Psi.

[0015] Preferably, in step 5, the flushing time of the wide-angle nozzle is 10-15 min.

[0016] The cleaning method of the anode cleaning system for the radial flow wet-type electric dust collector of the present application first softens the dirt on the mesh plate of the electric dust collector through the ultrasonic atomizing nozzle, then performs alkali washing on the mesh plate through the pulse nozzle, so that the lye reacts with the organic oil dirt to further reduce the viscosity of the dirt, then removes part of the dirt while flushing away the lye through water washing, then further removes the oxide in the dirt and on the surface of the mesh plate through acid washing, and then flushes the residual dirt on the mesh plate while removing the residual acid solution on the mesh plate through water washing with the wide-angle nozzle.

[0017] The present application has the following advantages: The cleaning method of the anode cleaning system for the radial flow wet-type electric dust collector of the present application destroys the adhesion of the dirt inside through the processes of softening, alkali washing and acid washing, and compared with directly flushing the mesh plate of the electric dust collector with high pressure, the water consumption and flushing pressure are significantly reduced.

[0018] The cleaning method of the anode cleaning system for the radial flow wet-type electric dust collector of the present application removes the oil dirt and iron oxide on the surface of the mesh plate through alkali washing and acid washing, which can significantly reduce the electric field shielding effect of the electric dust collector.

[0019] The ultrasonic atomizing nozzle in this application softens dirt on the stencil surface with a low flow rate and wide coverage. The pulse nozzle's intermittent spraying allows the cleaning liquid to penetrate more thoroughly, increasing the impact force on the stencil and making it easier to remove dirt. The wide-angle nozzle sprays more evenly per unit area, covers a wider horizontal area, and uses less water. The synergistic effect of these three can significantly reduce water consumption and flushing pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an anode cleaning system for a radial wet electrostatic precipitator according to the present application at a preferred angle; Figure 2 for Figure 1 Schematic diagram of the local structure.

[0021] Figure 3 This is a structural schematic diagram of another preferred angle of an anode cleaning system for a radial wet electrostatic precipitator of the present application; Figure 4 This is a cross-sectional view of an anode cleaning system for a radial wet electrostatic precipitator according to the present application.

[0022] Explanation of the accompanying drawings: cleaning and placement frame 1, lifting motor 101, reducer 102, transmission shaft 103, worm gear mechanism 104, screw 105, nut guide rail 106, lifting shell 107, infusion pipeline 2, diversion pipeline 201, confluence pipeline 202, rotating joint 203, rotation pipeline 204, four-way interface 205, atomizing nozzle pipeline 206, pulse nozzle pipeline 207, wide-angle nozzle pipeline 208, rotating motor 209, ultrasonic atomizing nozzle 3, pulse nozzle 4, wide-angle nozzle 5, water tank 6, alkali solution tank 7, acid solution tank 8, electric control valve 9, booster pump 10. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0024] Please see Figures 1 to 4 , an anode cleaning system for a radial flow wet electrostatic precipitator comprises: A cleaning and placement rack 1 directly facing the screen plate of the electrostatic precipitator; A liquid infusion pipe 2 is provided on the cleaning and placement frame 1; Ultrasonic atomizing nozzles 3, pulse nozzles 4, and wide-angle nozzles 5 distributed on the infusion pipeline 2; A water tank 6, an alkaline liquid tank 7 and an acid liquid tank 8 connected to the liquid infusion pipeline 2; An electrically controlled valve 9 and a booster pump 10 are provided on the liquid delivery pipe 2; A controller electrically connected to the electronically controlled valve 9 and the boost pump 10.

[0025] The ultrasonic atomizing nozzle 3, the pulse nozzle 4, and the wide-angle nozzle 5 share the infusion pipe 2. In this way, the use of pipes can be significantly reduced, space can be saved, and maintenance is more convenient.

[0026] In a preferred embodiment, the booster pump 10 is a variable frequency pump to adapt to the spray flow and pressure of different nozzles and different stages.

[0027] The opening or closing of the electric control valve 9 and the boost pump 10 of the present application is controlled by a controller.

[0028] In a preferred embodiment, the radial flow wet electrostatic precipitator of the present application is provided with a row of nozzles for washing the screen plate. The screen plate is washed by the ultrasonic atomizing nozzle 3, the pulse nozzle 4 or the wide-angle nozzle 5 during the rotation process.

[0029] In another preferred embodiment, the radial wet electrostatic precipitator of the present application is provided with multiple rows of nozzles, and the ultrasonic atomizing nozzles 3, pulse nozzles 4, and wide-angle nozzles 5 in the same row are arranged at intervals, so that the entire mesh plate is washed by the ultrasonic atomizing nozzles 3, pulse nozzles 4 or wide-angle nozzles 5, and the mesh plate does not need to be rotated.

[0030] In order to facilitate the adjustment of the nozzle position, in a preferred embodiment, the cleaning and placement rack 1 includes a lifting motor 101; A reducer 102, wherein the power input shaft of the reducer 102 is connected to the rotating shaft of the lifting motor 101, and the reducer 102 is provided with two power output shafts; A transmission shaft 103, one end of which is connected to the power output shaft; A worm gear mechanism 104, wherein the worm of the worm gear mechanism 104 is connected to the other end of the transmission shaft 103; a lead screw 105 connected to the worm gear of the worm gear mechanism 104; A nut guide rail 106 , wherein the nut guide rail 106 is threadedly connected to the lead screw 105 ; The lifting shell 107 , the lead screw 105 and the nut guide rail 106 are located in the lifting shell 107 , the nut guide rail 106 drives the lifting shell 107 to move up and down, and the upper end of the lifting shell 107 is connected to the infusion pipeline 2 .

[0031] In a preferred embodiment, the liquid infusion pipeline 2 includes a shunt pipeline 201, which is provided with three liquid inlets, which are respectively connected to the water tank 6, the alkali liquid tank 7, and the acid liquid tank 8 and are controlled by an electric control valve 9 to control the outflow of water, alkali liquid or acid liquid. The shunt pipeline 201 is provided with a liquid outlet, which is connected to the liquid inlet of the booster pump 10; A conduit 202 connected to the liquid outlet of the booster pump 10; A self-rotating pipe 204 connected to the confluence pipe 202 via a rotary joint 203; A four-way interface 205 located at the end of the rotating pipe 204; Atomizing nozzle pipe 206, pulse nozzle pipe 207, and wide-angle nozzle pipe 208 connected to the four-way interface 205; An electric control valve is provided on each of the atomizing nozzle pipe 206, the pulse nozzle pipe 207 and the wide-angle nozzle pipe 208; In coordination with the self-rotating pipe 204 , the anode cleaning system for a radial wet electrostatic precipitator further includes a rotating motor 209 , the rotating shaft of the rotating motor 209 and the self-rotating pipe 204 being driven by gears.

[0032] In a preferred embodiment, when using the ultrasonic atomizing nozzle 3 to soften the dirt on the surface of the screen with clean water, the water tank 6 and the electric control valve where the ultrasonic atomizing nozzle 3 are located are opened, and the electric control valves where the alkaline solution, acid solution, pulse nozzle 4, and wide-angle nozzle 5 are located are closed.

[0033] When the pulse nozzle 4 is used to rinse the screen with clean water, the water tank 6 and the electric control valve where the pulse nozzle 4 is located are opened, and the electric control valves where the alkali solution, acid solution, ultrasonic atomizing nozzle 3 and wide-angle nozzle 5 are located are closed.

[0034] For other flushing methods, please refer to the above and will not be repeated.

[0035] In a preferred embodiment, the wide-angle nozzle 5 is a duckbill nozzle.

[0036] A cleaning method for an anode cleaning system of a radial flow wet electrostatic precipitator comprises the following steps: Step 1: Use clean water to soften the dirt on the surface of the screen using the ultrasonic atomizing nozzle 3; Step 2: Use the pulse nozzle 4 to rinse the screen surface with alkaline solution; The tiny droplets produced by the ultrasonic atomizing nozzle 3 penetrate deep into the dirt through capillary action, causing it to swell and expand its pores, making it easier for the alkali solution to penetrate. The intermittent spraying of the pulse nozzle 4 allows the alkali solution ample time to penetrate the dirt and react with the oil, thereby reducing the amount of alkali solution used. Furthermore, intermittent spraying provides a greater instantaneous impact force than continuous spraying, making it easier to remove dirt. After cleaning with the alkali solution, the cementing effect of the dirt is effectively destroyed. At the same time, the dirt becomes more hydrophilic, facilitating rinsing.

[0037] Step 3: Use the pulse nozzle 4 to use clean water to remove the alkali residue in the pipe and on the surface of the screen; There are no requirements for the cleaning time of step 3 and the output of the pulse nozzle 4. The main purpose is to dissolve the organic salt after the saponification reaction in water and remove it, and at the same time wash away the residual alkali solution. The pulse jet can destroy the interfacial bonding force between grease and substrate, and improve the saponification efficiency of sodium hydroxide solution on unburned carbon particles and lubricating oil. Alkali solution has a good effect on removing oil stains, but has no effect on oxides, and needs to be further rinsed with acid. However, the residual alkali solution will neutralize with the acid solution, thereby reducing the cleaning effect of the acid solution. The residual alkali solution can be removed by rinsing with clean water. At the same time, rinsing with clean water can also wash away some dirt, thereby reducing the consumption of acid. It can also make the dirt more fully contact with the acid solution, which is conducive to removing dirt.

[0038] Step 4: Use the pulse nozzle 4 to rinse the stencil surface with acid; The acidic solution in this application reacts with oxides, carbonates, and alkaline salts in the dirt, breaking down the internal bonding forces of the dirt and making it easier to remove. It also reacts with oxides on the surface of the screen, fully exposing the screen and reducing the electric field shielding effect.

[0039] Step 5: Use the wide-angle nozzle 5 in conjunction with the pulse nozzle 4 to rinse the screen surface with clean water.

[0040] Compared with the conical nozzle, the wide-angle nozzle 5 sprays more evenly per unit area and uses less water. At the same time, the water pressure of the wide-angle nozzle 5 is relatively low, which can avoid or reduce the deformation or coating shedding caused by high pressure on the screen.

[0041] In a preferred embodiment, in step 1, the output of the ultrasonic atomizing nozzle 3 is 0.2-0.5 L / min, and the flushing time is 10-15 min.

[0042] It should be noted that the output and flushing time of the ultrasonic atomizing nozzle 3 in this application are based on the rotation of the screen. The screen rotation speed is generally 2-3 m / min, and the screen circumference is generally 20-40 m. 10-15 minutes is sufficient for water to fully penetrate all parts of the screen.

[0043] In a preferred embodiment, in step 2, the alkali solution is a sodium hydroxide solution having a concentration of 1% to 1.5%, and the rinsing time is 15 to 20 minutes. In addition to sodium hydroxide solution, sodium carbonate and sodium bicarbonate solutions can also be used as the alkali solution. To ensure sufficient alkali cleaning, the rotation speed of the screen can be appropriately reduced so that all parts of the screen are covered.

[0044] In a preferred embodiment, in step 4, the acid solution is a hydrochloric acid solution with a concentration of 2% to 3%, and the rinsing time is 10 to 15 minutes. In addition to using a hydrochloric acid solution, a sulfuric acid solution can also be used as the acid solution. In a preferred embodiment, in step 2, step 3 or step 4, the single spraying duration of the pulse nozzle 4 is 80-120 ms, the time interval is 5 s, and the spraying pressure is 15-30 Psi.

[0045] In a preferred embodiment, in step 5, the flushing time of the wide-angle nozzle 5 is 10-15 min. The wide-angle nozzle 5 is selected from, but not limited to, a fan-shaped nozzle and a duckbill nozzle. The duckbill nozzle has a smaller required water pressure at the same angle and is less likely to be damaged.

[0046] It should be noted that the concentrations described in the present application are all mass percentage concentrations. For the sake of brevity, the mass percentages will not be emphasized in the foregoing and the following.

[0047] Hereinafter, the present application will be described in conjunction with examples and comparative examples.

[0048] Example 1 A cleaning method for an anode cleaning system of a radial flow wet-type electric dust collector includes the following steps: Step 1: using the ultrasonic atomizing nozzle 3 to soften the dirt on the surface of the mesh plate with clean water, the output of the ultrasonic atomizing nozzle 3 is 0.2 L / min, and the flushing time is 10 min; Step 2: using the pulse nozzle 4 to flush the surface of the mesh plate with alkali solution, the alkali solution is a sodium hydroxide solution with a concentration of 1%, the flushing time is 15 min, the single spraying duration of the pulse nozzle 4 is 80 ms, the time interval is 5 s, and the spraying pressure is 15 Psi; Step 3: using the pulse nozzle 4 to remove the residual alkali solution in the pipeline and on the surface of the mesh plate with clean water, the single spraying duration of the pulse nozzle 4 is 80 ms, the time interval is 5 s, and the spraying pressure is 15 Psi; Step 4: using the pulse nozzle 4 to flush the surface of the mesh plate with acid solution, the acid solution is a hydrochloric acid solution with a concentration of 2%, the flushing time is 10 min, the single spraying duration of the pulse nozzle 4 is 80 ms, the time interval is 5 s, and the spraying pressure is 15 Psi.

[0049] Step 5: using the wide-angle nozzle 5 in cooperation with the pulse nozzle 4 to flush the surface of the mesh plate with clean water, the flushing time of the wide-angle nozzle 5 is 10 min.

[0050] Example 2 A cleaning method for an anode cleaning system of a radial flow wet-type electric dust collector includes the following steps: Step 1: using the ultrasonic atomizing nozzle 3 to soften the dirt on the surface of the mesh plate with clean water, the output of the ultrasonic atomizing nozzle 3 is 0.5 L / min, and the flushing time is 15 min; Step 2: Use the pulse nozzle 4 to rinse the screen surface with alkali solution. The alkali solution is a sodium hydroxide solution with a concentration of 1.5%. The rinsing time is 20 minutes. The single spraying duration of the pulse nozzle 4 is 120 milliseconds, the time interval is 5 seconds, and the spraying pressure is 30 psi. Step 3: Use the pulse nozzle 4 to use clean water to remove the alkali solution residue in the pipe and on the surface of the screen. The pulse nozzle 4 has a single spray duration of 120ms, a time interval of 5s, and a spray pressure of 30Psi. Step 4: Use the pulse nozzle 4 to rinse the surface of the screen with acid. In step 4, the acid is a hydrochloric acid solution with a concentration of 3%. The rinsing time is 15 minutes. The single spraying duration of the pulse nozzle 4 is 120ms, the time interval is 5s, and the spraying pressure is 30Psi.

[0051] Step 5: Use the wide-angle nozzle 5 in conjunction with the pulse nozzle 4 to rinse the screen surface with clean water. The rinsing time of the wide-angle nozzle 5 is 15 minutes.

[0052] Comparative Example 1 The screen is flushed using conventional methods, that is, a row of high-pressure water flushing nozzles are set at the junction of the arc and the straight section at the bottom of the rotating anode as an anode cleaning device for flushing, and the flushing liquid is water.

[0053] Comparative Example 2 A row of high-pressure water flushing nozzles is set at the junction of the arc and the straight section at the bottom of the rotating anode as an anode cleaning device for flushing. The flushing liquid is a sodium hydroxide solution with a concentration of 1%.

[0054] Comparative Example 3 A row of high-pressure water flushing nozzles is set at the junction of the arc and the straight section at the bottom of the rotating anode as an anode cleaning device for flushing. The flushing liquid is hydrochloric acid with a concentration of 2%.

[0055] The anode screen plates of Example 1, Example 2, Comparative Example 1, Comparative Example 2, and Comparative Example 3 were cleaned 5 times at a frequency of once every 7 days, and the water consumption was counted after each cleaning. There is no national standard or enterprise standard for the cleaning of electrostatic precipitators. The cleaning standard of the electrostatic precipitator of this application is determined based on experience. Specifically, after cleaning, the local dirt area of ​​the screen plate is less than 30 square centimeters, and the number of dirt with a dirt area of ​​10 to 30 square centimeters does not exceed 20. After cleaning the screen plate as a whole, the number of dirt with a dirt area of ​​10 to 30 square centimeters on the anode plate and the water consumption were counted. The results are shown in Table 1: Table 1: It can be seen from Table 1 that the average number of dirt spots in 10-30 square centimeters after 5 cleanings in Example 1 is 7.8, the average number of dirt spots in 10-30 square centimeters after 5 cleanings in Example 2 is 6.6, the average number of dirt spots in 10-30 square centimeters after 5 cleanings in Comparative Example 1 is 12.8, the average number of dirt spots in 10-30 square centimeters after 5 cleanings in Comparative Example 2 is 11.4, and the average number of dirt spots in 10-30 square centimeters after 5 cleanings in Comparative Example 3 is 10.2.

[0056] The average water consumption after 5 cleanings of Example 1 is 6.3t, the average water consumption after 5 cleanings of Example 2 is 6.2t, the average water consumption after 5 cleanings of Comparative Example 1 is 10.7t, the average water consumption after 5 cleanings of Comparative Example 2 is 10.3t, and the average water consumption after 5 cleanings of Comparative Example 3 is 10.5t.

[0057] The above results show that, compared with the existing flushing method, the electrostatic precipitator is cleaned more thoroughly and uses less water after cleaning according to the cleaning method of the anode cleaning system for radial wet electrostatic precipitator of the present application.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An anode cleaning system for a radial wet electrostatic precipitator, characterized by: include: A cleaning mounting frame (1) facing the screen plate of the electrostatic precipitator; A liquid infusion pipe (2) arranged on the cleaning and placement frame (1); Ultrasonic atomizing nozzles (3), pulse nozzles (4), and wide-angle nozzles (5) distributed on the liquid delivery pipeline (2); A water tank (6), an alkali liquid tank (7) and an acid liquid tank (8) connected to the liquid delivery pipe (2); An electrically controlled valve (9) and a booster pump (10) provided on the liquid delivery pipeline (2); A controller electrically connected to the electric control valve (9) and the booster pump (10).

2. The anode cleaning system for a radial wet electrostatic precipitator according to claim 1, characterized in that: The cleaning and placement frame comprises a lifting motor (101); A reducer (102), wherein the power input shaft of the reducer (102) is connected to the rotating shaft of the lifting motor, and the reducer is provided with two power output shafts; A transmission shaft (103), one end of the transmission shaft (103) being connected to a power output shaft; A worm gear mechanism (104), wherein the worm of the worm gear mechanism (104) and the transmission shaft The other end is connected; a lead screw (105), the lead screw (105) being connected to the worm wheel of the worm gear mechanism (104); a nut guide rail (106), wherein the nut guide rail (106) is threadedly connected to the lead screw (105); A lifting shell (107), wherein the lead screw (105) and the nut guide rail (106) are located in the lifting shell (107), and the nut guide rail (106) drives the lifting shell (107) to rise and fall, and the upper end of the lifting shell (107) is connected to the infusion pipeline (2).

3. The anode cleaning system for a radial wet electrostatic precipitator according to claim 1, characterized in that: The infusion pipeline (2) comprises: A shunt pipe (201), wherein the shunt pipe (201) is provided with three liquid inlets, the three liquid inlets being respectively connected to the water tank (6), the alkali liquid tank (7), and the acid liquid tank (8), and the outflow of water, alkali liquid, or acid liquid is controlled by providing an electric control valve (9), and the shunt pipe (201) is provided with a liquid outlet, which is connected to the liquid inlet of the booster pump (10); A confluence pipe (202) connected to the liquid outlet of the booster pump (10); A self-rotating pipe (204) connected to the confluence pipe (202) via a rotating joint (203); A four-way interface (205) located at the end of the rotating pipe (204); An atomizing nozzle pipe (206), a pulse nozzle pipe (207), and a wide-angle nozzle pipe (208) connected to the four-way interface (205); An electric control valve (9) is respectively provided on the atomizing nozzle pipe (206), the pulse nozzle pipe (207), and the wide-angle nozzle pipe (208); The anode cleaning system for a radial wet electrostatic precipitator further comprises a rotating motor (209), wherein a rotating shaft of the rotating motor (209) and a self-rotating pipe (204) are driven by gears.

4. The anode cleaning system for a radial flow wet electrostatic precipitator according to claim 1, characterized in that: The wide-angle nozzle is a duckbill nozzle.

5. A cleaning method for an anode cleaning system of a radial wet electrostatic precipitator according to claim 1, characterized in that The following steps are involved: Step 1: Use clean water to soften the dirt on the surface of the screen using an ultrasonic atomizing nozzle (3); Step 2: Use a pulse nozzle (4) to rinse the screen surface with alkali solution; Step 3: Use the pulse nozzle (4) to use clean water to remove the alkali residue in the pipe and on the surface of the screen; Step 4: Using a pulse nozzle (4) to rinse the stencil surface with acid; Step 5: Use the wide-angle nozzle (5) in conjunction with the pulse nozzle (4) to rinse the screen surface with clean water.

6. The cleaning method according to claim 5, wherein: In step 1, the output of the ultrasonic atomizing nozzle (3) is 0.2-0.5 L / min, and the flushing time is 10-15 min.

7. The cleaning method according to claim 5, wherein: In step 2, the alkali solution is a sodium hydroxide solution with a concentration of 1% to 1.5%, and the rinsing time is 15 to 20 minutes.

8. The cleaning method according to claim 5, wherein: In step 4, the acid solution is a hydrochloric acid solution with a concentration of 2% to 3%, and the rinsing time is 10 to 15 minutes.

9. The cleaning method according to claim 5, wherein: In step 2, step 3 or step 4, the duration of a single spray of the pulse nozzle (4) is 80-120 ms, the time interval is 5 s, and the spray pressure is 15-30 Psi.

10. The cleaning method according to claim 5, wherein: In step 5, the flushing time of the wide-angle nozzle (5) is 10 to 15 minutes.

Images