Spraying absorption device for wet desulphurization

Abstract

The invention discloses a spray absorption device for wet desulphurization, which comprises a vertically arranged tower body, a tray horizontally and fixedly arranged in the tower body, a plurality of mass transfer grids uniformly arranged in the tray, vortex mass transfer components mounted in the mass transfer grids, and a plurality of spray nozzles mounted in the vortex mass transfer components, a spraying assembly and a demisting device are sequentially arranged above the tray, and a lifting type multifunctional grating assembly is arranged between the tray and the spraying assembly; according to the invention, the mass transfer grids are designed in the tray of the spray desulfurization tower, and the vortex plates are designed in the mass transfer grids, so that the flowing time of alkali liquor on the tray is prolonged, the alkali liquor is in full contact with flue gas, and the absorption efficiency of the alkali liquor is improved; meanwhile, the lifting type multifunctional grating assembly is designed between the spraying assembly and the tray, so that rising flue gas can be uniformly distributed, scales on the tray and the nozzle can be cleaned, and the service life of the spraying tower is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of wet desulfurization equipment, and in particular to a spray absorption device for wet desulfurization. Background Art

[0002] In the production process of graphitized electrodes, large-scale roasting furnaces and internal graphitization furnaces are the core and key production equipment. Such large furnaces will inevitably emit a large amount of flue gas. In order to achieve energy conservation and emission reduction and clean production, dust removal and flue gas desulfurization treatment have become indispensable processes. At present, limestone wet desulfurization technology is the most mainstream desulfurization technology, and the desulfurization spray tower is the most common desulfurization equipment. The general structure of the desulfurization spray tower in the existing technology includes a tower body, and a limestone alkaline slurry is arranged at the bottom of the tower body. The alkaline solution is sucked to the upper part of the spray tower by a slurry pump and then sprayed downwardly through the spray assembly. The falling alkaline solution droplets and the rising flue gas perform reverse mass transfer. In order to improve the gas-liquid mass transfer efficiency, a tray is often installed under the spray assembly, and a flue gas uniform distribution hole is provided on the tray. The flue gas uniform distribution hole plays the role of uniformly distributing the rising flue gas, and the falling droplets form a flowing liquid film in the tray, which also participates in the gas-liquid mass transfer for desulfurization.

[0003] As is well known, how to increase the gas-liquid mass transfer efficiency is the main technical means to improve the desulfurization efficiency in wet flue gas desulfurization. In the existing technology, the mass transfer efficiency is usually improved by increasing the number of spray and tray layers and adding packing layers. However, although these methods increase the gas-liquid mass transfer efficiency, they lead to excessive flue gas resistance in the spray tower and have to be matched with a high-power fan, which increases the operating cost dramatically. In addition, scaling is very likely to occur, resulting in blockage of the nozzle or the flue gas distribution hole of the tray. Ultimately, the equipment is forced to shut down for overhaul. During the overhaul, it is time-consuming and labor-intensive to remove the scaling in the nozzle or the flue gas distribution hole, and the workload is large. Therefore, the present invention provides a spray desulfurization device with higher mass transfer efficiency and easy cleaning of scaling. Summary of the Invention

[0004] (1) Technical problems solved

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

[0006] (2) Technical solution

[0007] Content of the present invention: A spray absorption device for wet desulfurization, which includes a vertically arranged tower body, on which a discharge pipe, a feed pipe and an inlet flue are arranged in sequence from bottom to top, a smoke outlet is arranged at the top of the tower body, a tray is fixed horizontally in the tower body, a plurality of mass transfer grids are evenly arranged in the tray, a smoke distribution through hole is arranged at the center of the mass transfer grid, a vortex mass transfer assembly is installed in the mass transfer grid, the vortex mass transfer assembly includes a vortex plate, and the vortex plate is in the shape of an Archimedean spiral. A spray assembly and a demisting device are arranged in sequence above the tray, and a lifting multifunctional grille assembly is arranged between the tray and the spray assembly. The lifting multifunctional grille assembly is used to evenly distribute rising flue gas and clean scale on the tray and the spray assembly.

[0008] Furthermore, the vortex mass transfer assembly also includes a mass transfer plate, which is installed in the mass transfer grid, and the vortex plate is installed on the mass transfer plate. A central through hole is opened at the center of the mass transfer plate, and the central through hole is coaxial with the smoke distribution through hole. The central through hole is located at the center of the vortex plate, and 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 opened on the tray, and the positioning pin is inserted into the positioning hole.

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

[0011] Furthermore, the spray assembly includes a vertically arranged slurry pipeline, which is connected to a slurry pump, and the slurry pump is used to pump the alkaline slurry at the bottom of the tower body. The slurry pipeline is connected to a horizontally arranged spray main pipeline, and a plurality of spray horizontal pipes are connected to the spray main pipeline, and a plurality of spray vertical pipes are connected to the spray horizontal pipes. A plurality of nozzles are evenly installed on the spray main pipeline and the spray vertical pipes, and the nozzles are located in the tower body.

[0012] Furthermore, the lifting multifunctional grille assembly includes a horizontally arranged smoke distribution grille, on which a number of descaling columns matching the positions of the smoke distribution through holes are installed vertically downward, and a number of descaling cones matching the positions of the nozzles are installed vertically upward, and the smoke distribution grille is transmission-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 distribution grille, and the other end of the steel wire rope is connected to the winch after passing through the first pulley and the second pulley in sequence, the first pulley is rotatably connected to the spray cross pipe, and the second pulley is rotatably connected to the outer wall of the tower body.

[0014] Furthermore, a plurality of rollers are rotatably connected to the outer edge of the smoke distribution grille, and a plurality of rolling grooves matching the rollers are vertically opened on the inner wall of the tower body, and the rollers roll up and down in the rolling grooves.

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

[0016] (3) Beneficial effects

[0017] The beneficial effects of the present invention are as follows: the present invention designs a mass transfer grid inside the tray of the spray desulfurization tower, and designs a vortex plate inside the mass transfer grid, thereby increasing the flow time and flow path of the alkali solution on the tray, making the alkali solution and the flue gas more fully in contact and mass transfer, thereby improving the absorption efficiency of the alkali solution; at the same time, a lifting multifunctional grille assembly is designed between the spray assembly and the tray, which can not only evenly distribute the rising flue gas, but also has the function of cleaning the scale on the tray and the nozzle, and cleaning the scale is faster and more convenient, thereby effectively extending the service life of the spray tower and reducing the number of overhauls, and is worthy of large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

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

[0020] Figure 3 A three-dimensional diagram 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 perspective view of a vortex mass transfer assembly;

[0023] Figure 6 is a three-dimensional diagram of the spray assembly;

[0024] Figure 7 A perspective view of a lifting multifunctional grille assembly;

[0025] In the figure, the tower body 1, the feed pipe 2, the discharge pipe 3, the inlet flue 4, the slurry pump 5, the winch 6, the tray 7, the mass transfer grid 8, the smoke distribution hole 9, the mass transfer plate 10, the vortex plate 11, the central through hole 12, the positioning pin 13, the smoke distribution grid 14, the descaling column 15, the descaling cone 16, the roller 17, the roller groove 18, the slurry pipeline 19, the spray main pipeline 20, the spray longitudinal pipe 21, the nozzle 22, the first pulley 23, the wire rope 24, the second pulley 25, the smoke outlet 27, the positioning hole 28, the demisting device 29, and the spray horizontal pipe 30. DETAILED DESCRIPTION

[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, on which a discharge pipe 3, a feed pipe 2 and an inlet flue 4 are arranged in sequence from bottom to top, a smoke outlet 27 is arranged at the top of the tower body 1, a tray 7 is fixedly arranged horizontally in the tower body 1, a plurality of mass transfer grids 8 are evenly arranged in the tray 7, a smoke distribution through hole 9 is arranged at the center of the mass transfer grid 8, a vortex mass transfer assembly is installed in the mass transfer grid 8, the vortex mass transfer assembly includes a vortex plate 11, and the vortex plate 11 is an Archimedean spiral shape, a spray assembly and a demister 29 are arranged in sequence above the tray 7, and the demister 29 can be a common corrugated plate demister, and a lifting multifunctional grille assembly is arranged between the tray 7 and the spray assembly, and the lifting multifunctional grille 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 in the mass transfer grid 8, and a vortex plate 11 is installed on the mass transfer plate 10. A central through hole 12 is opened 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, and 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 setting of the slope helps to increase the fluidity of the alkali solution and reduce precipitation; in order to facilitate installation and positioning, a positioning pin 13 is installed on the bottom surface of the mass transfer plate 10, and a positioning hole 28 is opened on the tray 7. The positioning pin 13 is inserted into the positioning hole 28. In order to prevent loosening, the positioning pin 13 and the positioning hole 28 are transitionally matched.

[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 the alkaline slurry at the bottom of the tower body 1. The slurry pipeline 19 is connected to a horizontally arranged spray main pipeline 20, and a plurality of spray horizontal pipes 30 are connected to the spray main pipeline 20, and a plurality of spray vertical pipes 21 are connected to the spray horizontal pipes 30. A plurality of nozzles 22 are evenly installed on the spray main pipeline 20 and the spray vertical pipes 21, and the nozzles 22 are located inside the tower body 1.

[0030] like Figure 7 As shown, the lifting multifunctional grille assembly includes a horizontally arranged smoke distribution grille 14, on which a plurality of descaling columns 15 matching the positions of the smoke distribution through holes 9 are installed vertically downward, and a plurality of descaling cones 16 matching the positions of the nozzles 22 are installed vertically upward on the smoke distribution grille 14, and the smoke distribution grille 14 is transmission-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 grille 14, and the other end of the steel wire rope 24 is connected to the winch 6 after passing through the first pulley 23 and the second pulley 25 in sequence. The first pulley 23 is rotatably connected to the spray cross pipe 30, and the second pulley 25 is rotatably connected to the outer wall of the tower body 1; in order to facilitate the lifting and lowering of the smoke distribution grille 14, a plurality of rollers 17 are rotatably connected to the outer edge of the smoke distribution grille 14, and a plurality of rolling grooves 18 matching the rollers 17 are vertically opened on the inner wall of the tower body 1, and the rollers 17 roll up and down in the rolling grooves 18. In order 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, Figures 1 to 7As shown, the flue gas enters from the inlet flue 4, and then passes through the tray 7 and the uniform distribution effect of the smoke distribution grid 14, and the flue gas rises evenly in the tower body 1. During this process, a part of the flue gas contacts and transfers mass with the alkali solution sprayed from the nozzle 22 in countercurrent, and the other part of the flue gas transfers mass with the alkali solution liquid film flowing on the mass transfer plate 10, and a neutralization reaction desulfurization occurs. The vortex plate 11 can increase the flow path and flow time of the alkali solution on the mass transfer plate 10, thereby improving the absorption efficiency of the alkali solution and improving the desulfurization efficiency. When the present invention is used for a long time Afterwards, the hoist 6 can be controlled regularly to raise and lower the smoke distribution grille 14. When the hoist 6 is rotated forward, the smoke distribution grille 14 rises, and the descaling cone 16 on the smoke distribution grille 14 enters the nozzle of the nozzle 22, so that the scale on the edge of the nozzle of the nozzle 22 is loosened and falls off, thereby preventing the scale from continuing to accumulate and clogging. When the hoist 6 is reversed, the smoke distribution grille 14 rolls down by its own weight, and the descaling column 15 on the smoke distribution grille 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] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A spray absorption device for wet desulfurization, characterized by: The invention relates to a tower body (1) provided with a vertically arranged tower body, wherein a discharge pipe (3), a feed pipe (2) and an inlet flue (4) are sequentially arranged on the tower body (1) from bottom to top, a smoke outlet (27) is provided at the top of the tower body (1), a tray (7) is fixedly arranged horizontally in the tower body (1), a plurality of mass transfer grids (8) are evenly arranged in the tray (7), a smoke distribution hole (9) is provided at the center of the mass transfer grid (8), a vortex mass transfer assembly is installed in the mass transfer grid (8), the vortex mass transfer assembly comprises a vortex plate (11), the vortex plate (11) is in the shape of an Archimedean spiral, a spray assembly and a demisting device (29) are sequentially arranged above the tray (7), a lifting multifunctional grille assembly is provided between the tray (7) and the spray assembly, and the lifting multifunctional grille assembly is used for evenly distributing rising smoke and cleaning scale on the tray (7) and the spray assembly.

2. The spray absorption device for wet desulfurization according to claim 1, characterized in that: The vortex mass transfer assembly further comprises a mass transfer plate (10), wherein the mass transfer plate (10) is mounted in the mass transfer grid (8), the vortex plate (11) is mounted 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), and the central through hole (12) is located at the lowest end of the slope.

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

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

5. The spray absorption device for wet desulfurization according to claim 2, characterized in that: The spray assembly includes a vertically arranged slurry pipeline (19), the slurry pipeline (19) is connected to a slurry pump (5), the slurry pump (5) is used to suck the alkaline slurry at the bottom of the tower body (1), the slurry pipeline (19) is connected to a horizontally arranged spray main pipeline (20), a plurality of spray transverse pipes (30) are connected to the spray main pipeline (20), a plurality of spray longitudinal pipes (21) are connected to the spray transverse pipes (30), a plurality of spray heads (22) are evenly installed on the spray main pipeline (20) and the spray longitudinal pipes (21), and the spray heads (22) are located in the tower body (1).

6. The spray absorption device for wet desulfurization according to claim 5, characterized in that: The lifting multifunctional grille assembly comprises a horizontally arranged smoke distribution grille (14), on which a plurality of descaling columns (15) are mounted vertically downward and matched with the positions of the smoke distribution through holes (9), and a plurality of descaling cones (16) are mounted vertically upward and matched with the positions of the nozzles (22), and the smoke distribution grille (14) is transmission-connected to the lifting drive assembly.

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

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

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

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