Efficient demister for removing SO3 acid mist

Abstract

The invention discloses an efficient demister for removing SO3 acid mist, and relates to the technical field of gas purification equipment. The demister comprises a demister shell, wherein the demister shell comprises an electrostatic demister base, an electrostatic demister middle part, an electrostatic demister upper part and an electrostatic demister top part; in the invention, by utilizing the charge adsorption effect of the high-voltage electric field on the acid mist, the demisting efficiency can be obviously improved, the acid mist in the SO3 gas can be effectively removed, and the pollution to the environment and the corrosion risk to subsequent equipment are reduced; the anode tube and the cathode are both made of conductive PVDF materials, the cathode supporting piece is made of non-conductive PVDF materials, the electrostatic demister base, the electrostatic demister middle part, the electrostatic demister upper part and the electrostatic demister top are all made of PP materials, and all-around corrosion-resistant materials are selected, so that the demister can stably run for a long time in a severe SO3 acid mist environment; the service life of equipment is greatly prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas purification equipment technology, specifically to a high-efficiency demister for removing SO3 acid mist. Background Technology

[0002] In industrial production processes, such as sulfuric acid manufacturing and metallurgy, waste gas containing SO3 is generated. Under certain conditions, SO3 gas can form acid mist, which not only causes serious pollution to the environment and damages the ecological balance, but also corrodes downstream equipment, affecting its normal operation and service life. However, traditional demisters suffer from low demisting efficiency and easy corrosion when dealing with acid mist containing SO3 gas. Common metal demisters are extremely prone to corrosion in SO3 acid mist environments, leading to equipment damage and high maintenance costs. Meanwhile, some non-metallic demisters, due to their performance limitations, cannot work effectively in a high-voltage electric field environment, making it difficult to meet the demand for efficient removal of SO3 acid mist. Therefore, developing a demister that can efficiently remove acid mist from SO3 gas and has good corrosion resistance is of great practical significance. To address the aforementioned problems, the inventors proposed a high-efficiency demister for removing SO3 acid mist. Summary of the Invention

[0003] In order to solve the problems of low demisting efficiency, easy corrosion of equipment and inconvenience in working under high voltage electric field environment in the existing technology, the purpose of this invention is to provide a high-efficiency demisting device for removing SO3 acid mist.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a high-efficiency demister for removing SO3 acid mist, comprising a demister housing, wherein the demister housing comprises an electrostatic demister base, an electrostatic demister middle section, an electrostatic demister upper section, and an electrostatic demister top section, wherein the electrostatic demister base, electrostatic demister middle section, electrostatic demister upper section, and electrostatic demister top section are fixedly assembled from bottom to top; The electrostatic demister base, the middle part of the electrostatic demister and the upper part of the electrostatic demister are equipped with an anode tube and a cathode. Several anode tubes and cathodes are arranged. The cathode passes through the anode tube and is coaxial with the anode tube. The cathode includes an electrode body, a hook, and a stainless steel core. The electrode body is disposed outside the stainless steel core. One end of the electrode body is welded inside the hook. A support plate is disposed inside the hook. One end of the stainless steel core is welded to one end of the support plate. The hook is covered with lead.

[0005] Preferably, the base, middle part, upper part and top of the electrostatic demister are made of PP material.

[0006] Preferably, a bottom gasket is installed between the base of the electrostatic demister and the middle part of the electrostatic demister, and a middle gasket is installed between the middle part of the electrostatic demister and the upper part of the electrostatic demister, and between the upper part of the electrostatic demister and the top of the electrostatic demister.

[0007] Preferably, the electrode body is made of PB99.985+Cu material, the hook is made of Pb C-276 material, the stainless steel core is made of C-276 material, and the outer lead sheath is made of C276 material.

[0008] Preferably, the anode tube is made of conductive PVDF material.

[0009] Preferably, an anode tube gasket is fixedly provided on the inner wall of the upper part of the electrostatic precipitator, and a plurality of anode tubes are assembled on the anode tube gasket.

[0010] Preferably, a cathode support is fixedly provided on the inner wall of the upper part of the electrostatic precipitator, and a plurality of cathode support strips are fixedly provided on the cathode support, and the hook is snapped onto the cathode support strips; A cathode connector is fixedly installed on the inner wall of the electrostatic demister base, and the end of the electrode body away from the hook is snapped onto the cathode connector.

[0011] Preferably, the cathode support, cathode support strip, and cathode connector are made of non-conductive PVDF material.

[0012] Preferably, an insulator is mounted on the upper part of the electrostatic demister. Three insulators are provided and fixed on three sides of the upper part of the electrostatic demister. A pull rod is mounted inside the insulator. The pull rod is made of conductive PVDF material, and one end of the pull rod is fixedly connected to the end of the cathode support.

[0013] Preferably, an acid mist inlet is fixedly provided on the base of the electrostatic precipitator, and an acid mist exhaust port is provided at the upper end of the top of the electrostatic precipitator.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the high-voltage electric field is used to charge and adsorb acid mist, which can significantly improve the demisting efficiency, effectively remove acid mist from SO3 gas, and reduce environmental pollution and corrosion risk to downstream equipment. 2. In this invention, the anode tube and cathode are both made of conductive PVDF material, the cathode support is made of non-conductive PVDF material, and the base, middle part, upper part and top of the electrostatic demister are all made of PP material. The comprehensive selection of corrosion-resistant materials enables the demister to operate stably for a long time in harsh SO3 acid mist environment, greatly extending the service life of the equipment and reducing maintenance costs. 3. In this invention, the non-conductive PVDF material of the cathode support effectively avoids current leakage and ensures the safety of equipment operation. At the same time, the reasonable selection of materials and structural design of each component enable the equipment to operate stably in a high-voltage electric field environment, improving the reliability of the work. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a high-efficiency demister for removing SO3 acid mist according to the present invention.

[0017] Figure 2 This is a side view of the structure of a high-efficiency demister for removing SO3 acid mist according to the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of a high-efficiency demister for removing SO3 acid mist according to the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the cathode of the present invention.

[0020] Figure 5 This is a schematic diagram of the planar structure of the cathode of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of part A in the diagram.

[0022] Figure 7 This is a schematic diagram of the composition and structure of the cathode of the present invention.

[0023] In the diagram: 1. Electrostatic precipitator base; 2. Middle part of electrostatic precipitator; 3. Upper part of electrostatic precipitator; 4. Top of electrostatic precipitator; 5. Anode tube; 6. Cathode; 7. Cathode support; 8. Cathode support bar; 9. Insulator; 11. Cathode connector; 12. Bottom gasket; 13. Middle gasket; 14. Anode tube gasket; 15. Pull rod; 20. Acid mist inlet; 30. Acid mist outlet; 61. Electrode body; 62. Hook; 63. Stainless steel core; 64. Support plate; 65. Lead sheath. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example: Figure 1-7 As shown, the present invention provides a high-efficiency demister for removing SO3 acid mist, including a demister housing. The demister housing includes an electrostatic demister base 1, an electrostatic demister middle part 2, an electrostatic demister upper part 3, and an electrostatic demister top 4. The electrostatic demister base 1, electrostatic demister middle part 2, electrostatic demister upper part 3, and electrostatic demister top 4 are fixedly assembled from bottom to top. An acid mist inlet 20 is fixedly provided on the electrostatic demister base 1, and an acid mist exhaust port 30 is provided at the upper end of the electrostatic demister top 4. By providing the acid mist inlet 20 and the acid mist exhaust port 30, the acid mist to be treated can enter the interior of the electrostatic demister base 1, the electrostatic demister middle part 2, and the electrostatic demister upper part 3 through the acid mist inlet 20, and the treated acid mist can be discharged outward through the acid mist exhaust port 30. The electrostatic precipitator base 1, the middle part 2 of the electrostatic precipitator, and the upper part 3 of the electrostatic precipitator are equipped with anode tubes 5 and cathodes 6. Several anode tubes 5 and cathodes 6 are arranged. The cathodes 6 pass through the anode tubes 5 and are coaxial with the anode tubes 5. The inner diameter of the anode tubes 5 is 360mm or 255mm and the wall thickness is 3mm. The spacing between multiple anode tubes 5 is 368mm or 263mm to ensure that the high voltage electric field formed after the high voltage power supply is applied is uniformly distributed. The cathode 6 includes an electrode body 61, a hook 62, and a stainless steel core 63. The electrode body 61 is disposed outside the stainless steel core 63. One end of the electrode body 61 is welded inside the hook 62. A support plate 64 is disposed inside the hook 62. One end of the stainless steel core 63 is welded to one end of the support plate 64. The hook 62 is covered with lead 65.

[0026] The electrostatic demister base 1, electrostatic demister middle section 2, electrostatic demister upper section 3, and electrostatic demister top 4 are made of PP material. The electrostatic demister base 1, electrostatic demister middle section 2, electrostatic demister upper section 3, and electrostatic demister top 4, made of PP material, can withstand working pressure and the influence of the external environment.

[0027] A bottom gasket 12 is installed between the base 1 and the middle part 2 of the electrostatic demister, and a middle gasket 13 is installed between the middle part 2 and the upper part 3 of the electrostatic demister, and between the upper part 3 and the top 4 of the electrostatic demister. By setting the bottom gasket 12 and the middle gasket 13, the sealing performance and structural strength of the demister shell are ensured during the assembly process of the base 1, the middle part 2, the upper part 3, and the top 4 of the electrostatic demister.

[0028] Electrode body 61 is made of PB99.985+Cu material, hook 62 is made of Pb C-276 material, stainless steel core 63 is made of C-276 material, lead cladding 65 is made of C276 material, and anode tube 5 is made of conductive PVDF material. By setting conductive anode tube 5 and cathode 6, and connecting to a high-voltage power supply, it is ensured that it can work effectively under a high-voltage electric field. By using the combination of PB99.985+Cu+Pb C-276, the structural integrity of cathode 6 is ensured during installation and use, maintaining its normal working state in the demister.

[0029] An anode tube gasket 14 is fixedly installed on the inner wall of the upper part 3 of the electrostatic precipitator, and several anode tubes 5 are assembled on the anode tube gasket 14.

[0030] A cathode support 7 is fixedly installed on the inner wall of the upper part 3 of the electrostatic precipitator. Several cathode support bars 8 are fixedly installed on the cathode support 7. Hooks 62 are snapped onto the cathode support bars 8. By setting the cathode support 7 and the cathode support bars 8, the cathode support 7 and the cathode support bars 8 are used to stably support the anode tube 5 and the cathode 6. A cathode connector 11 is fixedly installed on the inner wall of the electrostatic demister base 1, and the end of the electrode body 61 away from the hook 62 is snapped onto the cathode connector 11.

[0031] The cathode support 7, cathode support bar 8, and cathode connector 11 are made of non-conductive PVDF material.

[0032] An insulator 9 is mounted on the upper part 3 of the electrostatic precipitator. Three insulators 9 are installed and fixed on the three sides of the upper part 3 of the electrostatic precipitator. A pull rod 15 is installed inside the insulator 9. The pull rod 15 is made of conductive PVDF material. One end of the pull rod 15 is fixedly connected to the end of the cathode support 7. The pull rod 15 is used to support the anode tube 5 and the cathode 6 through the cathode support 7. When a high-voltage power cable is connected to one of the insulators 9, one end of the high-voltage power cable is connected to an external high-voltage device, and the other end is connected to the pull rod 15 to realize the access of the high-voltage power supply. The insulator 9 is used for insulation.

[0033] Working principle: When it is necessary to treat acid mist containing SO3, a high-voltage power cable is first connected through an insulator 9. One end of the high-voltage power cable is connected to one end of the pull rod 15, and the other end is connected to an external high-voltage power supply device. The high-voltage power supply device is connected to a high-voltage power supply. At this time, a high-voltage electric field is formed in the cathode 6 passing through the anode tube 5 and in the anode tube 5. Subsequently, the acid mist containing SO3 is introduced into the electrostatic precipitator base 1 through the acid mist inlet 20. The acid mist rises along the electrostatic precipitator base 1 and the middle part 2 of the electrostatic precipitator to the upper part 3 of the electrostatic precipitator, and comes into contact with the anode tube 5 and the cathode 6. The droplets in the acid mist become charged under the action of the high voltage electric field. The charged droplets move towards the anode tube 5 and the cathode 6 under the action of the high voltage electric field force and are adsorbed on their surfaces, thereby achieving the separation of acid mist from gas and achieving the purpose of efficiently removing SO3 acid mist.

[0034] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-efficiency demister for removing SO3 acid mist, comprising a demister housing, characterized in that: The demister housing includes an electrostatic demister base (1), an electrostatic demister middle section (2), an electrostatic demister upper section (3), and an electrostatic demister top section (4), which are fixedly assembled from bottom to top. The electrostatic demister base (1), the middle part (2) of the electrostatic demister and the upper part (3) of the electrostatic demister are equipped with an anode tube (5) and a cathode (6). Several anode tubes (5) and cathodes (6) are arranged. The cathode (6) passes through the anode tube (5) and is coaxial with the anode tube (5). The cathode (6) includes an electrode body (61), a hook (62) and a stainless steel core (63). The electrode body (61) is disposed outside the stainless steel core (63). One end of the electrode body (61) is welded inside the hook (62). A support plate (64) is disposed inside the hook (62). One end of the stainless steel core (63) is welded to one end of the support plate (64). The hook (62) is covered with lead (65).

2. The high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, The electrostatic demister base (1), the middle part (2), the upper part (3), and the top part (4) of the electrostatic demister are made of PP material.

3. The high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, A bottom gasket (12) is installed between the base (1) of the electrostatic demister and the middle part (2) of the electrostatic demister, and a middle gasket (13) is installed between the middle part (2) of the electrostatic demister and the upper part (3) of the electrostatic demister, and between the upper part (3) of the electrostatic demister and the top (4) of the electrostatic demister.

4. The high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, The electrode body (61) is made of PB99.985+Cu material, the hook (62) is made of Pb C-276 material, the stainless steel core (63) is made of C-276 material, and the outer lead (65) is made of C276 material.

5. The high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, The anode tube (5) is made of conductive PVDF material.

6. The high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, An anode tube gasket (14) is fixedly installed on the inner wall of the upper part (3) of the electrostatic demister, and several anode tubes (5) are assembled on the anode tube gasket (14).

7. The high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, A cathode support (7) is fixedly installed on the inner wall of the upper part (3) of the electrostatic demister, and a plurality of cathode support bars (8) are fixedly installed on the cathode support (7). The hook (62) is snapped onto the cathode support bar (8). The inner wall of the electrostatic demister base (1) is fixedly provided with a cathode connector (11), and the end of the electrode body (61) away from the hook (62) is snapped onto the cathode connector (11).

8. A high-efficiency demister for removing SO3 acid mist as described in claim 7, characterized in that, The cathode support (7), cathode support strip (8), and cathode connector (11) are made of non-conductive PVDF material.

9. A high-efficiency demister for removing SO3 acid mist as described in claim 7, characterized in that, An insulator (9) is mounted on the upper part (3) of the electrostatic demister. Three insulators (9) are provided and fixed on the three sides of the upper part (3) of the electrostatic demister. A pull rod (15) is mounted inside the insulator (9). The pull rod (15) is made of conductive PVDF material. One end of the pull rod (15) is fixedly connected to the end of the cathode support (7).

10. A high-efficiency demister for removing SO3 acid mist as described in claim 1, characterized in that, An acid mist inlet (20) is fixedly provided on the base (1) of the electrostatic demister, and an acid mist exhaust outlet (30) is provided at the upper end of the top (4) of the electrostatic demister.

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