A spray absorption device for wet desulfurization

Abstract

The application discloses a spraying absorption device for wet desulfurization, which comprises a tower body arranged vertically, a tray fixed horizontally in the tower body, a plurality of mass transfer squares uniformly arranged in the tray, a vortex mass transfer assembly installed in the mass transfer square, a spraying assembly and a demisting device arranged above the tray in sequence, and a lifting multifunctional grid assembly arranged between the tray and the spraying assembly. The mass transfer square is designed in the tray of the spraying desulfurization tower, and the vortex plate is designed in the mass transfer square, so that the flowing time of the alkali liquor on the tray is prolonged, the alkali liquor and the flue gas are more fully contacted, and the absorption efficiency of the alkali liquor is improved. Meanwhile, the lifting multifunctional grid assembly is designed between the spraying assembly and the tray, so that the ascending flue gas is uniformly distributed, and the scaling on the tray and the nozzle is cleaned, thereby effectively prolonging the service life of the spraying tower.

Description

Technical Field

[0001] This invention relates to the field of wet desulfurization equipment technology, and in particular to a spray absorption device for wet desulfurization. Background Technology

[0002] In the production of graphitized electrodes, large-scale roasting furnaces and internal graphitization furnaces are the core and critical production equipment. These large furnaces inevitably emit a large amount of flue gas. In order to achieve energy conservation, emission reduction, and clean production, dust removal and flue gas desulfurization treatment have become essential processes. At present, limestone wet desulfurization technology is the most mainstream desulfurization technology, and desulfurization spray towers are the most common desulfurization equipment. The general structure of existing desulfurization spray towers includes a tower body, with limestone alkaline slurry at the bottom of the tower body. The alkaline slurry is pumped to the upper part of the spray tower by a slurry pump, and then sprayed downwards through the spray components. The falling alkaline droplets and the rising flue gas undergo countercurrent mass transfer. In order to improve the gas-liquid mass transfer efficiency, a tray is often installed below the spray components. Flue gas distribution holes are set on the tray. The flue gas distribution holes play a role in distributing the rising flue gas evenly, and the falling droplets form a flowing liquid film in the tray, which also participates in gas-liquid mass transfer for desulfurization.

[0003] As is well known, increasing the gas-liquid mass transfer efficiency is the main technical means to improve the desulfurization efficiency of wet desulfurization. In existing technologies, mass transfer efficiency is usually improved by increasing the number of spray and tray layers and increasing the packing layer. However, although these methods increase the gas-liquid mass transfer efficiency, they lead to excessive flue gas resistance in the spray tower, which necessitates matching with a high-power fan, resulting in a sharp increase in operating costs. Moreover, they are prone to scaling, which can cause blockage of the nozzles or flue gas distribution holes in the trays, ultimately forcing the equipment to be shut down for major repairs. Cleaning the scale in the nozzles or flue gas distribution holes during major repairs is time-consuming, labor-intensive, and involves a large workload. Therefore, this invention provides a spray desulfurization device with higher mass transfer efficiency and easier scale removal. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a spray absorption device for wet desulfurization, so as to solve the technical problems of low gas-liquid mass transfer efficiency and difficulty in cleaning scale in the existing desulfurization spray absorption device.

[0006] (II) Technical Solution

[0007] The present invention relates to a spray absorption device for wet desulfurization, comprising a vertically arranged tower body, on which a discharge pipe, a feed pipe, and an inlet flue are arranged sequentially from bottom to top. A flue gas outlet is provided at the top of the tower body. A tray is horizontally fixedly arranged inside the tower body. A plurality of mass transfer grids are evenly arranged in the tray. A flue gas distribution hole is provided at the center of the mass transfer grids. A vortex mass transfer component is installed in the mass transfer grids. The vortex mass transfer component includes a vortex plate, which is an Archimedean spiral. A spray assembly and a demister are arranged sequentially above the tray. A lifting multi-functional grid assembly is arranged between the tray and the spray assembly. The lifting multi-functional grid assembly is used to evenly distribute the rising flue gas and clean the scale on the tray and the spray assembly.

[0008] Furthermore, the vortex mass transfer assembly also includes a mass transfer plate, which is installed within the mass transfer grid. A vortex plate is mounted on the mass transfer plate, and a central through hole is formed at the center of the mass transfer plate. The central through hole is coaxial with the smoke distribution through hole and is located at the center of the vortex plate. A slope is provided on the mass transfer plate, and the central through hole is located at the lowest end of the slope.

[0009] Furthermore, a positioning pin is installed on the bottom surface of the mass transfer plate, and a positioning hole is provided on the tray, with the positioning pin inserted into the positioning hole.

[0010] Furthermore, the positioning pin and the positioning hole are in a transition fit.

[0011] Furthermore, the spray assembly includes a vertically arranged slurry pipeline connected to a slurry pump for drawing alkaline slurry from the bottom of the tower. The slurry pipeline is connected to a horizontally arranged main spray pipeline, which has several horizontal spray pipes connected to it. Several vertical spray pipes are connected to the horizontal spray pipes, and several nozzles are evenly installed on the main spray pipeline and the vertical spray pipes. The nozzles are located inside the tower.

[0012] Furthermore, the lifting multi-functional grille assembly includes a horizontally arranged smoke distribution grille, several descaling columns that match the positions of the smoke distribution through holes are vertically installed downwards on the smoke distribution grille, and several descaling cones that match the positions of the nozzles are vertically installed upwards on the smoke distribution grille. The smoke distribution grille is connected to the lifting drive assembly.

[0013] Furthermore, the lifting drive assembly includes a steel wire rope, one end of which is connected to the smoke grid, and the other end of which passes through a first pulley and a second pulley in sequence and is connected to a winch. The first pulley is rotatably connected to the spray pipe, and the second pulley is rotatably connected to the outer wall of the tower body.

[0014] Furthermore, several rollers are rotatably connected to the outer edge of the smoke grid, and several roller grooves matching the rollers are vertically opened on the inner wall of the tower body, and the rollers roll up and down in the roller grooves.

[0015] Furthermore, the steel wire rope is wrapped with a PVC anti-corrosion layer.

[0016] (III) Beneficial Effects

[0017] The beneficial effects of this invention are as follows: This invention designs a mass transfer grid within the tray of the spray desulfurization tower, and incorporates a vortex plate within the mass transfer grid. This increases the flow time and path of the alkali solution on the tray, allowing for more thorough contact and mass transfer between the alkali solution and the flue gas, thereby improving the absorption efficiency of the alkali solution. Simultaneously, a lifting multi-functional grid assembly is designed between the spray components and the tray. This assembly not only ensures uniform distribution of the rising flue gas but also cleans scale buildup on the tray and nozzles, making scale removal faster and more convenient. This effectively extends the service life of the spray tower and reduces the frequency of major overhauls, making it worthy of widespread application. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 A three-dimensional view of the installation structure of the tray and vortex mass transfer assembly;

[0021] Figure 4 A cross-sectional view of the mounting structure of the tray and vortex mass transfer assembly;

[0022] Figure 5 A 3D view of the vortex mass transfer assembly;

[0023] Figure 6 This is a 3D view of the spray system.

[0024] Figure 7 A 3D view of a lifting multi-functional grille assembly;

[0025] In the diagram, the components are: 1. Tower body; 2. Feed pipe; 3. Discharge pipe; 4. Inlet flue; 5. Slurry pump; 6. Winch; 7. Tray; 8. Mass transfer grid; 9. Smoke distribution through hole; 10. Mass transfer plate; 11. Vortex plate; 12. Central through hole; 13. Positioning pin; 14. Smoke distribution grid; 15. Descaling column; 16. Descaling cone; 17. Roller; 18. Roller groove; 19. Slurry pipeline; 20. Main spray pipeline; 21. Spray longitudinal pipe; 22. Spray head; 23. First pulley; 24. Wire rope; 25. Second pulley; 27. Smoke outlet; 28. Positioning hole; 29. ​​Demisting device; 30. Spray horizontal pipe. Detailed Implementation

[0026] Example 1

[0027] like Figures 1 to 3 As shown, a spray absorption device for wet desulfurization includes a vertically arranged tower body 1. From bottom to top, a discharge pipe 3, a feed pipe 2, and an inlet flue 4 are sequentially arranged on the tower body 1. A flue gas outlet 27 is located at the top of the tower body 1. A tray 7 is horizontally fixed inside the tower body 1. Several mass transfer grids 8 are evenly arranged within the tray 7. A flue gas distribution hole 9 is located at the center of each mass transfer grid 8. A vortex mass transfer assembly is installed within each mass transfer grid 8. The vortex mass transfer assembly includes a vortex plate 11, which is an Archimedean spiral. Above the tray 7, a spray assembly and a demister 29 are sequentially arranged. The demister 29 can be a common corrugated plate demister. A lifting multi-functional grid assembly is arranged between the tray 7 and the spray assembly. The lifting multi-functional grid assembly is used to evenly distribute the rising flue gas and clean the scale on the tray 7 and the spray assembly.

[0028] like Figures 3 to 5 As shown, the vortex mass transfer assembly also includes a mass transfer plate 10, which is installed within the mass transfer grid 8. A vortex plate 11 is mounted on the mass transfer plate 10. A central through hole 12 is formed at the center of the mass transfer plate 10, and the central through hole 12 is coaxial with the smoke distribution through hole 9. The central through hole 12 is located at the center of the vortex plate 11. A slope is provided on the mass transfer plate 10, and the central through hole 12 is located at the lowest end of the slope. The slope helps to increase the fluidity of the alkali solution and reduce sedimentation. To facilitate installation and positioning, a positioning pin 13 is installed on the bottom surface of the mass transfer plate 10. A positioning hole 28 is formed on the tray 7, and the positioning pin 13 is inserted into the positioning hole 28. To prevent loosening, the positioning pin 13 and the positioning hole 28 are in a transition fit.

[0029] like Figure 6As shown, the spray assembly includes a vertically arranged slurry pipeline 19, which is connected to a slurry pump 5. The slurry pump 5 is used to pump alkaline slurry from the bottom of the tower body 1. The slurry pipeline 19 is connected to a horizontally arranged main spray pipeline 20. Several horizontal spray pipes 30 are connected to the main spray pipeline 20, and several vertical spray pipes 21 are connected to the horizontal spray pipes 30. Several nozzles 22 are evenly installed on the main spray pipeline 20 and the vertical spray pipes 21. The nozzles 22 are located inside the tower body 1.

[0030] like Figure 7 As shown, the lifting multi-functional grille assembly includes a horizontally arranged smoke distribution grille 14, several descaling columns 15 that match the positions of the smoke distribution through holes 9 are vertically installed downwards on the smoke distribution grille 14, and several descaling cones 16 that match the positions of the nozzles 22 are vertically installed upwards on the smoke distribution grille 14. The smoke distribution grille 14 is connected to the lifting drive assembly.

[0031] like Figure 2 and Figure 7 As shown, the lifting drive assembly includes a steel wire rope 24. One end of the steel wire rope 24 is connected to the smoke distribution grid 14, and the other end of the steel wire rope 24 passes through a first pulley 23 and a second pulley 25 in sequence before being connected to a winch 6. The first pulley 23 is rotatably connected to the spray horizontal pipe 30, and the second pulley 25 is rotatably connected to the outer wall of the tower body 1. To facilitate the lifting and lowering of the smoke distribution grid 14, several rollers 17 are rotatably connected to the outer edge of the smoke distribution grid 14. Several roller grooves 18 that match the rollers 17 are vertically opened on the inner wall of the tower body 1. The rollers 17 roll up and down in the roller grooves 18. To prevent the steel wire rope from being corroded and damaged, a PVC anti-corrosion layer is wrapped around the steel wire rope 24.

[0032] When the present invention is running, such as Figures 1 to 7As shown, flue gas enters from the inlet flue 4, and then rises uniformly within the tower body 1 through the uniform distribution effect of the tray 7 and the smoke distribution grid 14. During this process, a portion of the flue gas undergoes countercurrent mass transfer with the alkaline solution sprayed from the nozzle 22, while another portion undergoes mass transfer with the alkaline solution film flowing on the mass transfer plate 10, resulting in a neutralization reaction and desulfurization. The vortex plate 11 can increase the flow path and flow time of the alkaline solution on the mass transfer plate 10, thereby improving the absorption efficiency of the alkaline solution and the desulfurization efficiency. When this invention has been used for a long time... Afterwards, the winch 6 can be periodically controlled to raise and lower the smoke distribution grid 14. When the winch 6 rotates forward, the smoke distribution grid 14 rises, and the descaling cone 16 on the smoke distribution grid 14 enters the nozzle of the nozzle 22, loosening and removing the scale on the edge of the nozzle 22, preventing the scale from accumulating and causing blockage. When the winch 6 rotates in reverse, the smoke distribution grid 14 rolls down by its own weight, and the descaling column 15 on the smoke distribution grid 14 enters the smoke distribution through hole 9 and the central through hole 12 to remove the dirt in the smoke distribution through hole 9 and the central through hole 12.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spray absorption device for wet desulfurization, characterized in that: It includes a vertically arranged tower body (1), on which a discharge pipe (3), a feed pipe (2), and an inlet flue (4) are arranged sequentially from bottom to top. A smoke outlet (27) is provided at the top of the tower body (1). A tray (7) is horizontally fixed inside the tower body (1). Several mass transfer grids (8) are evenly arranged inside the tray (7). A smoke distribution hole (9) is provided at the center of the mass transfer grids (8). A vortex mass transfer component is installed inside the mass transfer grids (8). The vortex mass transfer component includes a vortex plate (11). The vortex plate (11) is an Archimedean spiral. A spray component and a demisting device (29) are arranged sequentially above the tray (7). A lifting multi-functional grid component is arranged between the tray (7) and the spray component. The lifting multi-functional grid component is used to evenly distribute the rising flue gas and clean the scale on the tray (7) and the spray component. The mass transfer assembly also includes a mass transfer plate (10), which is installed in the mass transfer grid (8). The vortex plate (11) is installed on the mass transfer plate (10). A central through hole (12) is provided at the center of the mass transfer plate (10). The central through hole (12) is coaxial with the smoke distribution through hole (9). The central through hole (12) is located at the center of the vortex plate (11). A slope is provided on the mass transfer plate (10). The central through hole (12) is located at the lowest end of the slope. The lifting multi-functional grid assembly includes a horizontally arranged smoke distribution grid (14). Several descaling columns (15) that match the position of the smoke distribution through hole (9) are installed vertically downward on the smoke distribution grid (14). Several descaling cones (16) that match the position of the spray assembly are installed vertically upward on the smoke distribution grid (14). The smoke distribution grid (14) is connected to the lifting drive assembly.

2. The spray absorption device for wet desulfurization according to claim 1, characterized in that: A positioning pin (13) is installed on the bottom surface of the mass transfer plate (10), and a positioning hole (28) is provided on the tray (7). The positioning pin (13) is inserted into the positioning hole (28).

3. The spray absorption device for wet desulfurization according to claim 2, characterized in that: The positioning pin (13) and the positioning hole (28) are in transition fit.

4. The spray absorption device for wet desulfurization according to claim 1, characterized in that: The spray assembly includes a vertically arranged slurry pipeline (19), which is connected to a slurry pump (5). The slurry pump (5) is used to pump alkaline slurry from the bottom of the tower body (1). The slurry pipeline (19) is connected to a horizontally arranged spray main pipeline (20). Several spray horizontal pipes (30) are connected to the spray main pipeline (20), and several spray vertical pipes (21) are connected to the spray horizontal pipes (30). Several nozzles (22) are evenly installed on the spray main pipeline (20) and the spray vertical pipes (21). The nozzles (22) are located inside the tower body (1).

5. A spray absorption device for wet desulfurization according to claim 4, characterized in that: The lifting drive assembly includes a steel wire rope (24), one end of which is connected to the smoke grid (14), and the other end of which passes through the first pulley (23) and the second pulley (25) in sequence and is connected to the winch (6). The first pulley (23) is rotatably connected to the spray pipe (30), and the second pulley (25) is rotatably connected to the outer wall of the tower body (1).

6. A spray absorption device for wet desulfurization according to claim 5, characterized in that: Several rollers (17) are rotatably connected to the outer edge of the smoke grid (14), and several roller grooves (18) matching the rollers (17) are vertically opened on the inner wall of the tower body (1). The rollers (17) roll up and down in the roller grooves (18).

7. A spray absorption device for wet desulfurization according to claim 5, characterized in that: The steel wire rope (24) is wrapped with a PVC anti-corrosion layer.

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