High-efficiency oxidation absorption section tail gas acid mist removal electric demister and removal system

Abstract

The invention discloses an efficient oxidation absorption section tail gas acid mist removal electric demister and a removal system, a corona cathode wire of the electric demister comprises a wire main body and barbs located on the peripheral surface of the wire main body, the cross section of the wire main body is hexagonal, and the barbs which are linearly arranged are correspondingly arranged on each edge of the wire main body. According to the embodiment of the invention, the discharge cathode corona six-needle spiny corona electrode wire is arranged in the electric demister, so that the discharge area is increased, the contact area of liquid drops is increased, the collision force of the liquid drops is improved, and the trapping efficiency of the liquid drops is improved. And the middle hexagonal tooth row shape, the barbs continuously arranged on the periphery and the structure that the barbs protrude out of the wire main body are more favorable for enhancing the discharge process so as to adapt to the requirement of higher air velocity.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment in the chemical industry, and particularly relates to an electric demister and a removal system for removing acid mist from the tail gas in an efficient oxidation absorption section. Background Art

[0002] Sulfur recovery is an important process component in large purification plants, refineries, and sulfur-related chemical plants. Since 100% sulfur recovery cannot be achieved in sulfur recovery, a large amount of sulfur-containing compounds still exist in the tail gas, such as SO2, H2S, organic sulfur, etc. Currently, the main sulfur-containing tail gas treatment technologies include alkali absorption method, reduction absorption method, oxidation absorption method, and sulfur dioxide adsorption method. Among them, oxidation absorption has the advantages of low SO2 emission concentration, large operation flexibility, and high gas-liquid ratio. However, there are also some problems in the oxidation absorption process. Among them, wastewater is the most prominent problem. For the wastewater in the oxidation absorption process, it mainly comes from two aspects: one is that the cooling water in the Venturi tower contains a large amount of water-soluble products of SO2 and SO3, which need to be neutralized with NaOH solution, thus generating a large amount of neutralized sewage. The other is that it is necessary to regularly start the amine liquid purification unit (APU) during operation to remove sulfates. The APU generally uses ion exchange resin, and this resin needs to be revived with alkali solution, so wastewater will be continuously generated.

[0003] Therefore, it is necessary to further study the liquid mist capture technology to improve its liquid mist removal rate, which plays an important role in reducing the wastewater discharge of the tail gas oxidation absorption process and improving the operation stability of the device. The demister is a key device in the desulfurization system, and the quality of its performance directly affects the accumulation of heat-stable salts in the absorption tower.

[0004] At present, there have been many years of experience in electrostatic demisters, but they are mostly used in industries such as chemical industry and metallurgy, and the gas velocity is very low (about 1 m / s), and the demisting efficiency is also relatively low. It is very important to develop a high-gas-velocity and efficient wet electrostatic demister.

[0005] In view of this, this patent application is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide an electric demister and an acid mist removal system for removing acid mist from the tail gas in an efficient oxidation absorption section, and solve the technical problems of low demisting efficiency and low gas velocity of the existing electrostatic demister mentioned above.

[0007] The present invention is achieved through the following technical solutions:

[0008] The first purpose of the present invention is to provide an electric demister for removing acid mist from the tail gas in an efficient oxidation absorption section. The corona cathode wire of the electric demister includes a wire body and barbs located on the outer peripheral surface of the wire body. The cross-section of the wire body is hexagonal, and the barbs are linearly arranged corresponding to each side of the wire body.

[0009] In an optional embodiment, both the wire body and the barbs of the corotron cathode wire are made of lead-antimony alloy.

[0010] In an optional embodiment, the corotron cathode wire is located at the center of the anode tube of the electrostatic demister, and the deviation between the corotron cathode wire and the center line of the anode tube is less than or equal to 3 mm;

[0011] Two anode tubes of the electrostatic demister are arranged side by side and connected.

[0012] In an optional embodiment, the electrostatic demister includes a tail gas inlet tower, a discharge and collection system, and an acid liquid collection tank. The tail gas inlet tower is located at the top, the acid liquid collection tank is located at the bottom, and the discharge and collection system is located between the tail gas inlet tower and the acid liquid collection tank. A honeycomb wire mesh filter structure is provided at the front end of the tail gas inlet tower, and the corotron cathode wire is located in the discharge and collection system.

[0013] In an optional embodiment, a tubular desulfurization pipe is provided at the rear end of the tail gas inlet tower, and a briquette solid binder is provided inside the tubular desulfurization pipe.

[0014] In an optional embodiment, an asbestos board is laid on the inner wall of the shell of the tail gas inlet tower, a lead sheet is laid on the asbestos board, and a chlorosulfonated polyethylene layer is sprayed on the outer wall of the shell of the tail gas inlet tower.

[0015] In an optional embodiment, the anode tube of the electrostatic demister is a six-sided hollow tube formed by connecting 6 conductive flexible anode plates. Each of the guiding flexible anode plates is composed of a flame-retardant conductive resin layer, a medium-alkali glass fiber cloth layer, and a winding yarn resin layer arranged in sequence, and the flame-retardant conductive resin layer is close to the corotron cathode wire.

[0016] The second object of the present invention is to provide an efficient oxidation absorption section tail gas acid mist removal system, which includes a tail gas introduction and discharge system and the efficient oxidation absorption section tail gas acid mist removal electrostatic demister as described in any one of the above, and also includes a water supply and cleaning system;

[0017] The tail gas introduction and discharge system includes a pre-washing tower and a honeycomb pre-desulfurization absorption tower. The outlet end of the honeycomb pre-desulfurization absorption tower is connected to the tail gas inlet tower of the electrostatic demister. The spray nozzles of the spray layer of the water supply and cleaning system extend above the discharge and collection system of the electrostatic demister to spray ammonia liquid for demisting into the electrostatic demister.

[0018] In an optional embodiment, the operating parameters of the electrostatic demister are: voltage 60 - 72 kV, tail gas flow rate 0.8 - 1.2 m / s, droplet particle size 0.1 - 5 μm, droplet particle density 800 - 1000 kg / m 3, the relative dielectric constant of the droplet particles is 75 - 85, the temperature of the ammonia solution for electrostatic demisting is 25°C, and the spraying pressure of the ammonia solution is 0.5 - 3.0 kgf / cm² 2 .

[0019] In an optional embodiment, two spraying layers are provided in the water supply cleaning system, and a single - layer continuous spraying and multi - layer intermittent alternating spraying method is adopted.

[0020] The advantages and beneficial effects of the present invention compared with the prior art are as follows:

[0021] (1) An electrostatic demister for removing acid mist from the tail gas in the high - efficiency oxidation absorption section provided in the embodiment of the present invention adopts a new six - needle barbed corona electrode wire as the cathode wire, which increases the discharge area, and at the same time increases the contact area of the droplets, improves the droplet collision force, and improves the droplet capture efficiency. The structure of the middle hexagonal tooth - row shape, the continuously arranged barbs around the periphery, and the barbs protruding outside the wire body is more conducive to strengthening the discharge process to meet the requirements of a higher gas velocity.

[0022] (2) In the embodiment of the present invention, the installation of the cathode wire is fixed according to the principle of tensioning weight, ensuring the verticality and concentricity of the electrode wire and avoiding radial shaking.

[0023] (3) In the embodiment of the present invention, a three - stage acid mist removal structure is adopted for the entire acid mist removal system. A highly corrosion - resistant honeycomb wire mesh filtration and absorption device and a rear - end tubular desulfurization pipe containing briquette solid binder are respectively configured at the front end of the tail gas inlet and the rear end of the tail gas outlet. It can effectively perform pre - demisting and uniform gas velocity treatment, play a role in removing large - droplet acid mist at the inlet of the demister and extremely difficult - to - remove fine sulfur - containing tail gas at the rear - end outlet, greatly improve the removal efficiency of the entire sulfur - containing tail gas acid mist, and ensure that the acid mist removal efficiency in the process route system reaches more than 95%.

[0024] (4) In the embodiment of the present invention, the demisting effect of the electrostatic demister is simulated and analyzed through Comsol6.1 software. Under the conditions of a voltage of 60 - 72 kV, an inlet gas velocity of 0.8 - 1.2 m / s, a droplet particle density of 1000 kg / m 3 , and a droplet particle size of 0.1 - 5 μm, the demisting efficiency can reach 98%, and the error compared with the actual removal efficiency does not exceed ±2%, far meeting the national standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:

[0026] Figure 1 Structural schematic diagram of a discharge capture system for acid mist removal by an electrostatic demister in the efficient oxidation absorption section tail gas provided by an embodiment of the present invention;

[0027] Figure 2 Internal structural schematic diagram of a discharge capture system for acid mist removal by an electrostatic demister in the efficient oxidation absorption section tail gas provided by an embodiment of the present invention;

[0028] Figure 3 Structural schematic diagram of an electrostatic demister for acid mist removal in the efficient oxidation absorption section tail gas provided by an embodiment of the present invention;

[0029] Figure 4 Cross-sectional view of a tubular demister for acid mist removal in the efficient oxidation absorption section tail gas provided by an embodiment of the present invention;

[0030] Figure 5 Structural schematic diagram of a honeycomb wire mesh filtration structure installed at the front end of the tail gas inlet section;

[0031] Figure 6 3D model diagram and electric potential distribution diagram obtained by using a Comsol numerical simulation and simulation model;

[0032] Figure 7 Model fitting diagram obtained by using a Comsol numerical simulation and simulation model;

[0033] Figure 8 Model fitting analysis diagram under the conditions of a particle size of 0.2 - 0.3 μm at a voltage of 72 kV and an air velocity of 1.2 m / s;

[0034] Figure 9 Model fitting analysis diagram under the conditions of a particle size of 0.5 - 0.6 μm at a voltage of 60 kV and an air velocity of 1.2 m / s;

[0035] Figure 10 Model fitting analysis diagram under the conditions of a voltage of 64 kV, an inlet velocity of 0.8 - 1.0 m / s, and a particle size of 0.1 - 0.5 μm.

[0036] Markings in the drawings and corresponding component names:

[0037] 1 - wire body, 2 - barbs, 3 - anode tube, 4 - tail gas inlet tower, 5 - discharge capture system, 6 - acid liquid collection tank, 7 - honeycomb wire mesh filtration structure. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to embodiments and the accompanying drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0039] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those of ordinary skill in the art that: the present invention may be practiced without these specific details. In other instances, well-known structures, circuits, materials, or methods have not been specifically described to avoid obscuring the understanding of the present invention.

[0040] Throughout the specification, the reference to "one embodiment", "embodiment", "one example" or "example" means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "embodiment", "one example" or "example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. In addition, those of ordinary skill in the art should understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0041] In the description of the present invention, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.

[0042] As Figures 1 - 5 shown in [reference], an electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section, the corona cathode wire of the electric demister includes a wire body 1 and barbs 2 located on the outer peripheral surface of the wire body 1. The cross-section of the wire body 1 is hexagonal, and the barbs 2 are linearly arranged corresponding to each side of the wire body 1.

[0043] In the embodiment of the present invention, by arranging a discharge cathode corona six-needle barb 2-type corona electrode wire inside the electric demister, the discharge area is increased, and at the same time, the contact area of the droplets is increased, the droplet collision force is improved, and the droplet capture efficiency is improved. The toothed row shape of the middle hexagon, the continuously arranged barbs 2 on the periphery, and the structure in which the barbs 2 protrude outside the wire body 1 are more conducive to strengthening the discharge process to meet the requirements of a higher gas velocity.

[0044] Furthermore, both the wire body 1 and the barbs 2 of the coronal cathode wire are made of lead-antimony alloy. Lead-antimony alloy is a material with high corrosion resistance. Changing the structural form of the corona wire under high gas velocity conditions can increase the specific current of the corona wire to maintain high efficiency. The corona electrode wire is suspended at the center of the anode tube 3 of the electrostatic demister. The deviation between the corona electrode wire and the center line of the anode tube 3 does not exceed 3 mm. It can be fixed according to the tension hammer fixing principle. Install the tension hammer at the lower part of the corona electrode wire to ensure the verticality and concentricity of the electrode wire and avoid radial shaking. Under the condition of a relatively large flue gas velocity, the corona electrode wire does not swing violently, or even if it swings, the amplitude of the swing is within the allowable range, making the current and voltage in the electrostatic field highly stable and ensuring the normal operation of the equipment.

[0045] Furthermore, the electrostatic demister includes three parts, namely the tail gas intake tower 4, the discharge capture system 5, and the acid liquid collection tank 6. The tail gas intake tower 4 is located at the top and is used to introduce the tail gas into the electrostatic demister. The acid liquid collection tank 6 is located at the bottom and is used to collect the acidic solution formed by the reaction of acid mist and ammonia liquid. The discharge capture system 5 is located between the tail gas intake tower 4 and the acid liquid collection tank 6. The discharge capture system 5 includes a middle shell. The coronal cathode wire is located in the shell of the discharge capture system 5. Similarly, the anode tube 3 of the discharge capture system 5 is sleeved outside the coronal cathode wire. Discharge capture is carried out through the interaction between the coronal cathode wire and the central anode tube 3.

[0046] Preferably, a honeycomb wire mesh filter structure 7 is provided at the front end of the tail gas intake tower 4 to pre-treat large droplets; and a tubular desulfurization tube is provided at the rear end of the gas outlet of the tail gas intake tower 4. A briquette solid binder is provided inside the tubular desulfurization tube. The briquette solid binder can adopt the domestically independently developed GCB briquette solid binder to improve the removal efficiency of the sulfur-containing gas overflowing.

[0047] In this embodiment, by providing a honeycomb wire mesh filter structure 7 at the front end of the tail gas intake tower 4, a tubular desulfurization tube at the rear end of the gas outlet of the tail gas intake tower 4, and together with the discharge capture system 5, a three-stage acid mist removal structure is formed. High anti-corrosion honeycomb wire mesh filter absorption structures are configured before and after the intake and outlet of the tail gas intake tower 4, and a rear-end tubular desulfurization tube containing a briquette solid binder can effectively perform pre-dewaxing and uniform gas velocity treatment, playing a role in removing large droplet acid mist at the intake of the demister and extremely difficult-to-remove fine sulfur-containing tail gas at the rear-end outlet, greatly improving the removal efficiency of the entire sulfur-containing tail gas acid mist and ensuring that the acid mist removal efficiency in the process route system reaches more than 95%.

[0048] Preferably, an asbestos board is first laid on the inner wall of the housing of the tail gas intake tower 4, and then lead sheets are laid on the asbestos board. A chlorosulfonated polyethylene layer is sprayed on the outer wall of the housing of the tail gas intake tower 4 to enhance the external anti-corrosion ability of the electrostatic demister.

[0049] Furthermore, the anode tube 3 of the electrostatic demister is a six-sided hollow tube formed by connecting 6 conductive flexible anode plates. Each of the guiding flexible anode plates is composed of a flame-retardant conductive resin layer, a medium-alkali glass fiber cloth layer, and a winding yarn resin layer arranged in sequence. The flame-retardant conductive resin layer is close to the corona cathode wire, thus forming a three-layer structure from the inner cavity to the outer surface. This six-sided hollow tube formed by enclosing the anode plates serves as the precipitating electrode of the electrostatic demister. The three-layer structure of the precipitating electrode in this embodiment can greatly increase its effective cross-sectional area, has good electrical conductivity of the material, is not easy to adhere and scale, and is easy to clean. Two anode tubes 3 are connected and arranged.

[0050] The working parameters of the electrostatic demister in this embodiment are: voltage 60 kV - 72 kV, gas flow rate of the tail gas 0.8 m / s - 1.2 m / s, particle size of the mist droplets in the electrostatic demister 0.1 - 5 μm, density of the mist droplets 800 - 1000 kg / m 3 ³, relative dielectric constant of the mist droplets 75 - 85, temperature of the ammonia solution for electrostatic demisting 25 °C, ammonia solution spraying pressure 0.5 - 3.0 kgf / cm² 2 . Through the ingenious design of these working parameters, the acid mist removal efficiency reaches over 95%.

[0051] Embodiment 2:

[0052] A tail gas acid mist removal system for an efficient oxidation absorption section includes the tail gas acid mist removal electrostatic demister in Embodiment 1, and also includes a tail gas introduction and discharge system and a water supply and cleaning system; the tail gas introduction and discharge system includes a pre-washing tower and a honeycomb pre-desulfurization absorption tower. The outlet end of the honeycomb pre-desulfurization absorption tower is connected to the tail gas intake tower 4 of the electrostatic demister. In the pre-washing tower, ammonia-rich liquid is used for pre-washing the tail gas to form substances such as (NH₄)₂SO₃ and (NH₄)₂SO₄. Later, these substances are subjected to acid atomization treatment in the electrostatic demister to form droplets. The honeycomb pre-desulfurization absorption tower uses a honeycomb wire mesh to intercept acid mist droplets and particles with a particle size of more than 0.1 μm, and then the electrostatic demister removes smaller droplets after mechanical force collision.

[0053] The water supply and cleaning system's spray layer is configured with continuous spray cleaning nozzles, an ammonia solution / supplemental water storage tank, a supply pump, and a cleaning valve. The low-concentration ammonia solution or cleaning water is sprayed into the tower interior through the small nozzles of the continuous spray layer by the supply pump to clean the surface of the anode plate. The required spraying pressure is 0.5 - 7 kgf / cm² 2, at a temperature of 25 °C, 2 layers of spray nozzles are set, and single-layer continuous spraying and multi-layer intermittent alternating spraying operations are adopted. The spray nozzles extend above the discharge and collection system 5 of the electrostatic demister to spray ammonia solution for demisting into the electrostatic demister.

[0054] The Comsol numerical simulation and simulation model evaluation are carried out on the tail gas acid mist removal system in the high-efficiency oxidation absorption section provided by the embodiments of the present invention. The three-dimensional model diagram and potential distribution of the obtained model are shown in Figure 6 as shown in. The model fitting diagram is shown in Figure 7 as shown in, and the field strength, velocity, charge density, and particle movement trajectory are respectively simulated. From the above results, it can be seen that the electric field strength, potential, charge density, and velocity are all relatively close to the cylinder case. After being equivalent to a cylinder, it can be simplified to an axisymmetric model (a two-dimensional model can be established, with higher calculation accuracy and better accuracy). The main difference between the hexagonal prism and the cylinder of the present invention is at the six corners, where the electric field strength is slightly weaker. In order to make up for the deviation of the equivalent model, the analysis of a circle with a larger radius (circumscribed circle) can be used to simulate the dust removal and demisting effects at this position.

[0055] Therefore, the electrostatic dust removal analysis of the hexagonal prism type in the embodiments of the present invention can be equivalent to the analysis of the inscribed cylinder and the circumscribed cylinder, and a two-dimensional model with higher accuracy can be used for accurate analysis.

[0056] As shown in Figure 8 , under the conditions of a voltage of 72 kV, an inscribed circle diameter of the pipeline (tubular precipitator) of 330 mm, a pipeline length of 4500 mm, and a corona radius of 50 μm, when the inlet velocity is increased to 1.2 m / s, the droplet particles with a particle size greater than 0.3 μm can be completely captured in the electrostatic demister.

[0057] As shown in Figure 9 , under the conditions of a voltage of 60 kV, an inscribed circle diameter of the pipeline of 330 mm, a pipeline length of 4500 mm, and a corona radius of 50 μm, the gas velocity of the tail gas is 1.2 m / s, and all the droplet particles with a particle size greater than 0.2 μm can be captured in the demister. The greater the inlet velocity, the greater the minimum particle size of the removed particles. When the inlet velocity is 1 m / s, the demister can remove the droplet particles with a particle size greater than 0.4 μm. When the inlet velocity is increased to 1.2 m / s, the electrostatic demister can effectively remove the droplet particles with a particle size of 0.6 μm.

[0058] Another example is Figure 10As shown in the figure, under the conditions of a voltage of 64 kV, an inner diameter of the pipe's inscribed circle of 330 mm, a pipe length of 4500 mm, and a corona radius of 50 μm, with an inlet air velocity of 0.8 m / s, all droplet particles with a particle size greater than 0.1 μm can be captured in the demister. The greater the inlet air velocity, the larger the minimum particle size of the particles removed. When the inlet air velocity is 1 m / s, the demister can remove droplet particles with a particle size greater than 0.3 μm. When the inlet air velocity is increased to 1.2 m / s, the electrostatic demister can effectively remove droplet particles with a particle size of 0.5 μm.

[0059] Based on the above results, it is shown that when the droplet particle size is greater than 0.1 μm and the inlet air velocity is 0.8 m / s, by reducing the operating voltage of the electrostatic demister to 64 kV, all the droplets can be captured.

[0060] The above specific implementation manners have further elaborated in detail the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section, characterized in that The corona cathode wire of the electrostatic demister includes a wire body and barbs located on the outer peripheral surface of the wire body. The cross-section of the wire body is hexagonal, and the barbs are arranged linearly corresponding to each side of the wire body.

2. The electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section according to claim 1, characterized in that Both the wire body and the barbs of the corona cathode wire are made of lead-antimony alloy.

3. The electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section according to claim 1, characterized in that The corona cathode wire is located at the center of the anode tube of the electrostatic demister, and the deviation between the corona cathode wire and the center line of the anode tube is less than or equal to 3 mm. Two anode tubes of the electrostatic demister are arranged side by side and connected.

4. The electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section according to claim 1, characterized in that The electrostatic demister includes a tail gas inlet tower, a discharge and collection system, and an acid liquid collection tank. The tail gas inlet tower is located at the top, the acid liquid collection tank is located at the bottom, the discharge and collection system is located between the tail gas inlet tower and the acid liquid collection tank, and the corona cathode wire is located in the discharge and collection system.

5. The electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section according to claim 4, characterized in that A honeycomb wire mesh filter structure is provided at the front end of the tail gas inlet tower, and a tubular desulfurization tube is provided at the rear end of the tail gas inlet tower. A briquette solid binder is provided in the tubular desulfurization tube.

6. The electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section according to claim 4, characterized in that An asbestos board is laid on the inner wall of the shell of the tail gas inlet tower, and lead sheet is laid on the asbestos board. A chlorosulfonated polyethylene layer is sprayed on the outer wall of the shell of the tail gas inlet tower.

7. The electric demister for removing acid mist from the tail gas in the high-efficiency oxidation absorption section according to claim 1, characterized in that The anode tube of the electrostatic demister is a six-sided hollow tube formed by connecting 6 conductive flexible anode plates. Each of the guiding flexible anode plates is composed of a flame-retardant conductive resin layer, a medium-alkali fiberglass cloth layer, and a winding yarn resin layer arranged in sequence. The flame-retardant conductive resin layer is close to the corona cathode wire.

8. A tail gas acid mist removal system for the high-efficiency oxidation absorption section, characterized in that It includes a tail gas introduction and discharge system and the high-efficiency oxidation and absorption section tail gas acid mist removal electrostatic demister according to any one of claims 1 to 7, and also includes a water supply and cleaning system. The tail gas introduction and discharge system includes a pre-washing tower and a honeycomb pre-desulfurization absorption tower. The outlet end of the honeycomb pre-desulfurization absorption tower is connected to the tail gas inlet tower of the electrostatic demister. The spray nozzles of the spray layer of the water supply and cleaning system extend above the discharge and collection system of the electrostatic demister to spray ammonia liquid for demisting into the electrostatic demister.

9. The tail gas acid mist removal system for the high-efficiency oxidation absorption section according to claim 8, characterized in that The operating parameters of the electrostatic demister are as follows: voltage 60 - 72 kV, tail gas flow rate 0.8 - 1.2 m / s, droplet particle size 0.1 - 5 μm, droplet particle density 800 - 1000 kg / m 3 , relative dielectric constant of droplet particles 75 - 85, temperature of ammonia solution for electrostatic demisting 25 °C, ammonia solution spraying pressure 0.5 - 3.0 kgf / cm² 2 .

10. The tail gas acid mist removal system for the high-efficiency oxidation absorption section according to claim 8, characterized in that The spray layer of the water supply and cleaning system is provided with two layers, and the single-layer continuous spraying and multi-layer intermittent alternating spraying methods are adopted.

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