Exhaust gas desulfurization SO2 acid recovery unit

Abstract

This utility model discloses a tail gas desulfurization SO2 acid recovery device, including an annular plate. A conversion and saving mechanism is provided on the upper side of the base rib plate. The conversion and saving mechanism includes a shell, a fixing plate, a tube plate, a tube bundle support, an anode tube, a cathode wire, an upper gas chamber, a hanger, a gasket, an expansion joint, a hanger rod, and a high-voltage insulation box. The shell is fixedly connected to the upper side of the annular plate. The tube plate is fixedly connected to the upper side of the shell by screws. The tube bundle support is fixedly connected to the upper side of the tube plate. The tube bundle reinforcing rib is fixedly connected to the inner side of the tube bundle support. The anode tube is fixedly installed inside the tube bundle reinforcing rib, and the cathode wire is fixedly installed inside the anode tube. This utility model, through the setting of the conversion and saving mechanism, adjusts the conductivity of the anode tube, increases the cathode discharge density, and designs the cathode wire in a spiral shape, enabling the anode and cathode corona fields to generate ozone, thereby oxidizing sulfur dioxide (SO2) in the gas to sulfur trioxide (SO3).

Description

Technical Field

[0001] This utility model relates to the technical field of tail gas desulfurization SO2 acid recovery device, specifically a tail gas desulfurization SO2 acid recovery device. Background Technology

[0002] The acid recovery unit is mainly used for chemical tail gas treatment, specifically for treating sulfur dioxide (SO2) in chemical tail gas and achieving acid recovery, while reducing environmental pollution. The WESP consists of a corona wire (cathode), a dust collection electrode (anode), an insulating box, and a complete set of high-frequency electrical power supplies. After high-frequency conversion, a uniform high-voltage electrostatic field is formed between the two electrodes. Corona discharge: A corona field is generated around the corona wire. Cathode discharge causes acid mist (SO3) and dust particles in the flue gas to carry negatively charged ions, which are driven to the anode tube bundle under the action of the corona field. The anode is grounded to release the charge, and the moisture-containing gas causes the collected water to self-clean the anode tube bundle. Particle separation: Flue gas enters the electric field charging region, and acid mist, dust, and other particles are charged. After charging, the electrostatic aggregation of particles is enhanced, the particle size increases, and the charge increases. Under the action of the electric field force, they quickly reach the anode (precipitating electrode), release the charge, and achieve the separation of acid mist, dust, and other aerosol particles from the flue gas.

[0003] In most flue gas desulfurization SO2 acid recovery units, the ozone generated by the corona field is insufficient to digest SO2. Ozone has strong oxidizing properties and can normally be used to oxidize pollutants such as SO2. However, the low ozone generation by the WESP corona field makes it impossible to utilize ozone's oxidizing properties to treat SO2, making SO2 removal a challenge. This necessitates additional equipment or processes to treat SO2, resulting in poor practicality. Therefore, to address these issues, a flue gas desulfurization SO2 acid recovery unit is proposed. Utility Model Content

[0004] The present invention mainly addresses the technical problems existing in the prior art and provides a tail gas desulfurization SO2 acid recovery device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tail gas desulfurization SO2 acid recovery device, comprising an annular plate, a base rib, and tube bundle reinforcing ribs. A conversion and saving mechanism is provided on the upper side of the base rib. The conversion and saving mechanism includes a housing, a fixing plate, a tube sheet, a tube bundle support, an anode tube, a cathode wire, an upper gas chamber, a hanger, a gasket, an expansion joint, a hanger rod, and a high-voltage insulation box. The housing is fixedly connected to the upper side of the annular plate. The tube sheet is fixedly connected to the upper side of the housing by screws. The tube bundle support is fixedly connected to the upper side of the tube sheet. The tube bundle reinforcing rib is fixedly connected to the tube bundle support. Inside the tube bundle, the anode tube is fixedly installed inside the tube bundle reinforcing rib, the cathode wire is fixedly installed inside the anode tube, the upper gas chamber is fixedly connected to the upper side of the tube bundle support by screws, the gasket is fixedly connected to the upper side of the upper gas chamber, the expansion joint is fixedly connected to the upper side of the gasket, the high-voltage insulation box is fixedly installed to the upper side of the expansion joint, the hanger is fixedly connected to the inside of the high-voltage insulation box, the hanger is fixedly connected to one end of the hanger, the cathode wire is designed in a spiral shape, and several anode tubes and cathode wires are provided. The space where the high-voltage insulation box and the anode tube are located is connected.

[0006] Preferably, one end of the anode tube is fixedly connected to the hanger, and the other end of the anode tube is fixedly connected to the fixing plate. Several anode tubes are installed and fixed together by the hanger and the fixing plate, thereby fixing both ends of the anode tube. The fixing plate is made of polypropylene.

[0007] Preferably, a base rib is fixedly connected to the upper side of the ring plate, and a base plate is fixedly connected to the upper side of the base rib. A first connecting pipe, a second connecting pipe, and a manhole with a sight glass are fixedly connected to one side of the housing. The second connecting pipe is located above the first connecting pipe, and the manhole with a sight glass is a manhole with an observation sight glass, which facilitates the operator to inspect, maintain, and observe the inside of the equipment.

[0008] Preferably, the base stiffener, ring plate, bottom plate, connecting pipe one, connecting pipe two, manhole with sight glass and shell are made of glass fiber reinforced plastic, the expansion joint is made of rubber, and the cathode wire is made of alloy. Glass fiber reinforced plastic has high strength and can withstand greater pressure and external force, ensuring the stability of the equipment structure.

[0009] Preferably, the anode tube is provided with tube bundle reinforcing ribs on its exterior. There are two tube bundle reinforcing ribs. The tube bundle reinforcing ribs can constrain the middle section of the anode tube, thereby making the splicing of multiple anode tubes more stable.

[0010] Preferably, an air outlet pipe is fixedly connected to one side of the upper air chamber, and a grid is fixedly connected inside the shell. The grid and the air outlet pipe are made of glass fiber reinforced plastic, and the air outlet pipe is used to discharge the filtered gas.

[0011] Preferably, a grounding block is fixedly connected to one side of the housing, and a triangular rib plate is fixedly connected to the upper side of the ring plate. The grounding block is made of 304 stainless steel, and the triangular rib plate is made of glass fiber reinforced plastic.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, through the setting of the conversion saving mechanism, adjusts the conductivity of the anode tube, increases the cathode discharge density, and designs the cathode wire in a spiral shape, so that the anode and cathode corona fields can generate ozone, thereby oxidizing sulfur dioxide (SO2) in the gas into sulfur trioxide (SO3). Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a structural schematic diagram of the top cross-section of this utility model.

[0017] In the diagram: 1. Base stiffener; 2. Ring plate; 3. Base plate; 4. Connector 1; 6. Connector 2; 7. Grille; 8. Manhole with sight glass; 9. Fixing plate; 10. Shell; 11. Tube sheet; 12. Tube bundle support; 13. Anode tube; 14. Tube bundle reinforcing rib; 15. Cathode wire; 16. Upper gas chamber; 17. Hanger; 18. Gas outlet pipe; 19. High-voltage insulation box; 20. Hanger rod; 21. Expansion joint; 22. Gasket; 23. Grounding block; 24. Triangular stiffener. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2The exhaust gas desulfurization SO2 acid recovery unit includes an annular plate 2, a base rib 1, and a tube bundle reinforcing rib 14. A conversion and saving mechanism is provided on the upper side of the base rib 1. The conversion and saving mechanism includes a housing 10, a fixing plate 9, a tube sheet 11, a tube bundle support 12, an anode tube 13, a cathode wire 15, an upper gas chamber 16, a hanger 17, a gasket 22, an expansion joint 21, a hanger rod 20, and a high-voltage insulation box 19. The housing 10 is fixedly connected to the upper side of the annular plate 2. The tube sheet 11 is fixedly connected to the upper side of the housing 10 by screws. The tube bundle support 12 is fixedly connected to the upper side of the tube sheet 11. The tube bundle reinforcing rib 14 is fixedly connected to the inner side of the tube bundle support 12. The anode tube... The cathode wire 15 is fixedly installed inside the tube bundle reinforcing rib 14. The upper gas chamber 16 is fixedly connected to the upper side of the tube bundle support 12 by screws. The gasket 22 is fixedly connected to the upper side of the upper gas chamber 16. The expansion joint 21 is fixedly connected to the upper side of the gasket 22. The high-voltage insulation box 19 is fixedly installed to the upper side of the expansion joint 21. The hanger 20 is fixedly connected inside the high-voltage insulation box 19. The hanger 17 is fixedly connected to one end of the hanger 20. The cathode wire 15 is designed in a spiral shape. One end of the anode tube 13 is fixedly connected to the hanger 17, and the other end of the anode tube 13 is fixedly connected to the fixing plate 9. It mainly consists of a cathode wire 15, an anode tube 13, a high-voltage insulation box 19, and a complete set of high-frequency electrical power supplies. After high-frequency conversion, a uniformly distributed high-voltage electrostatic field is constructed between the anode and cathode. By adjusting the conductivity of the anode tube 13, increasing the cathode discharge density, and designing the cathode wire 15 in a spiral shape, the corona field between the anode and cathode can generate ozone, which then oxidizes sulfur dioxide (SO2) in the gas into sulfur trioxide (SO3). Under the action of the corona field, the cathode begins to discharge, causing acid mist and dust particles in the flue gas to become negatively charged. These negatively charged substances are then driven to the surface of the anode tube 13. The anode releases charge due to grounding, and because SO3 gas contains moisture, the collected moisture can automatically clean the anode tube 13. This process is called corona discharge. When the flue gas enters the charged region of the corona field, acid mist, dust, and other particles become charged. After being charged, the electrostatic coagulation of acid mist and dust particles is significantly enhanced, resulting in not only an increase in particle size but also an increase in charge. Driven by the electric field, these particles rapidly move towards the anode (the precipitation electrode). A large number of acid mist and dust particles are continuously driven towards the anode and rapidly release their charge, ultimately achieving successful separation of acid mist, dust, and other aerosol particles from the flue gas.

[0020] In one aspect of this embodiment, a base plate 3 is fixedly connected to the upper side of the base stiffener 1 to enhance the bottom support and stability of the equipment. A first connecting pipe 4, a second connecting pipe 6, and a manhole with a sight glass 8 are fixedly connected to one side of the housing 10. The second connecting pipe 6 is located above the first connecting pipe 4. The first connecting pipe 4 and the second connecting pipe 6 are used for exhaust gas inlet and outlet, and the manhole with a sight glass 8 facilitates inspection, maintenance, and observation of the equipment's interior. The base stiffener 1, ring plate 2, base plate 3, first connecting pipe 4, second connecting pipe 6, manhole with a sight glass 8, and housing 10 are all made of glass fiber reinforced plastic. The expansion joint 21 is made of rubber, and the cathode wire 15 is made of alloy. Glass fiber reinforced plastic has high strength and corrosion resistance, the rubber expansion joint 21 can effectively compensate for displacement, and the alloy cathode wire 15 ensures discharge performance. Two tube bundle reinforcing ribs 14 are provided on the outside of the anode tube 13. The two tube bundle reinforcing ribs 14 further enhance the stability of the anode tube bundle.

[0021] In one aspect of this embodiment, an exhaust pipe 18 is fixedly connected to one side of the upper air chamber 16 for discharging the treated gas. A grid 7 is fixedly connected inside the housing 10 to filter impurities and distribute the gas evenly. A grounding block 23 is fixedly connected to one side of the housing 10 to ensure the electrical safety of the equipment. A triangular rib plate 24 is fixedly connected to the upper side of the ring plate 2 to enhance the structural strength of the equipment.

[0022] The working principle of this utility model is as follows: When in use, the WESP (Waste Gas Desulfurization and SO2 Acid Recovery Unit) mainly consists of a cathode wire 15, an anode tube 13, a high-voltage insulation box 19, and a complete set of high-frequency electrical power supplies. After high-frequency conversion, a uniformly distributed high-voltage electrostatic field is constructed between the anode and cathode. By adjusting the conductivity of the anode tube 13, increasing the cathode discharge density, and designing the cathode wire 15 in a spiral shape, ozone can be generated in the anode and cathode corona fields, thereby oxidizing sulfur dioxide (SO2) in the gas into sulfur trioxide (SO3). Under the action of the corona field, the cathode begins to discharge, causing acid mist and dust particles in the flue gas to become negatively charged. These negatively charged substances are then driven to the surface of the anode tube 13. The anode releases charge due to grounding, and because SO3 gas contains moisture, the collected moisture can automatically clean the anode tube 13. This process is called corona discharge. When the flue gas enters the charged region of the corona field, acid mist, dust, and other particles become charged. After being charged, the acid mist and dust particles exhibit significantly enhanced electrostatic agglomeration, resulting in both increased particle size and increased charge. Driven by the electric field, these particles rapidly move towards the anode (the precipitation electrode). A large number of acid mist and dust particles are continuously driven towards the anode and rapidly release their charge, ultimately achieving successful separation of acid mist, dust, and other aerosol particles from the flue gas. All electrical equipment in this solution is powered by an external power source.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. Tail gas desulfurization SO2 acid collector, comprising ring plate (2), base rib plate (1) and tube bundle reinforcing rib (14), characterized in that: A conversion and saving mechanism is provided on the upper side of the base rib plate (1). The conversion and saving mechanism includes a shell (10), a fixing plate (9), a tube plate (11), a tube bundle support (12), an anode tube (13), a cathode wire (15), an upper gas chamber (16), a hanger (17), a gasket (22), an expansion joint (21), a hanger rod (20), and a high-voltage insulation box (19). The shell (10) is fixedly connected to the upper side of the ring plate (2). The tube plate (11) is fixedly connected to the upper side of the shell (10) by screws. The tube bundle support (12) is fixedly connected to the upper side of the tube plate (11). The tube bundle reinforcing rib (14) is fixedly connected to the inner side of the tube bundle support (12). On one side, the anode tube (13) is fixedly installed inside the tube bundle reinforcing rib (14), the cathode wire (15) is fixedly installed inside the anode tube (13), the upper gas chamber (16) is fixedly connected to the upper side of the tube bundle support (12) by screws, the gasket (22) is fixedly connected to the upper side of the upper gas chamber (16), the expansion joint (21) is fixedly connected to the upper side of the gasket (22), the high-voltage insulation box (19) is fixedly installed on the upper side of the expansion joint (21), the hanger (20) is fixedly connected to the inside of the high-voltage insulation box (19), the hanger (17) is fixedly connected to one end of the hanger (20), and the cathode wire (15) is designed in a spiral shape.

2. The tail gas desulphurization SO2acid collector according to claim 1, characterized in that: One end of the anode tube (13) is fixedly connected to the hanger (17), and the other end of the anode tube (13) is fixedly connected to the fixing plate (9).

3. The tail gas desulphurization SO2acid collector according to claim 1, characterized in that: The upper side of the ring plate (2) is fixedly connected to the base rib plate (1), the upper side of the base rib plate (1) is fixedly connected to the bottom plate (3), and the side of the shell (10) is fixedly connected to the first pipe (4), the second pipe (6) and the manhole with a viewing mirror (8), and the second pipe (6) is located on the upper side of the first pipe (4).

4. The tail gas desulphurization SO2acid collector according to claim 3, characterized in that: The base rib (1), ring plate (2), bottom plate (3), pipe one (4), pipe two (6), manhole with sight glass (8) and shell (10) are made of glass fiber reinforced plastic, the expansion joint (21) is made of rubber, and the cathode wire (15) is made of alloy.

5. The tail gas desulphurization SO2acid collector according to claim 1, characterized in that: The anode tube (13) is provided with tube bundle reinforcing ribs (14) on the outside, and there are two tube bundle reinforcing ribs (14).

6. The tail gas desulphurization SO2acid collector according to claim 1, characterized in that: An air outlet pipe (18) is fixedly connected to one side of the upper air chamber (16), and a grid (7) is fixedly connected inside the housing (10).

7. The tail gas desulphurization SO2acid collector according to claim 1, characterized in that: A grounding block (23) is fixedly connected to one side of the housing (10), and a triangular rib plate (24) is fixedly connected to the upper side of the ring plate (2).

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