Wet desulfurization and denitrification device
By introducing initial mixing, variable cross-section flow guiding, and treatment liquid reflux structures into the wet desulfurization and denitrification unit, the problems of insufficient processing efficiency and adaptability of existing equipment have been solved, and a highly efficient flue gas purification effect has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YIXING HAINA ENVIRONMENTAL ENG
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-12
AI Technical Summary
Existing wet desulfurization and denitrification equipment is insufficient in terms of processing efficiency and adaptability to flue gas composition, making it difficult to efficiently remove sulfur oxides and nitrogen oxides from waste gas.
A wet desulfurization and denitrification device was designed, which includes an initial mixing input mechanism to oxidize NO to NO2, a variable cross-section guiding mechanism to optimize gas-liquid mixing, a treatment liquid return propeller to promote the reaction, and combined with the circulation of ammonia solution to improve the desulfurization and denitrification efficiency and stability.
It significantly improves denitrification efficiency, reduces dependence on strongly acidic environments, enhances gas-liquid mixing and homogenizes the flow field, and improves the overall efficiency and stability of the process.
Smart Images
Figure CN224221090U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of desulfurization and denitrification technology, specifically a wet desulfurization and denitrification device. Background Technology
[0002] Wet desulfurization and denitrification is a pollution control technology used to remove sulfur oxides and nitrogen oxides from waste gas, such as removing sulfur oxides (SO₄) from flue gas emitted by coal-fired power plants and industrial boilers. x ) and nitrogen oxides (NO) x This is an important technology in the field of flue gas purification. Its core principle is to use a liquid absorbent to react chemically or physically with pollutants in the waste gas, thereby separating them from the flue gas and achieving the purpose of purification and emission.
[0003] However, existing desulfurization and denitrification equipment still falls short in terms of processing efficiency and adaptability to flue gas composition, and needs further improvement and optimization. Utility Model Content
[0004] The purpose of this invention is to provide a wet desulfurization and denitrification device that can remove sulfur oxides and nitrogen oxides from waste gas more efficiently and has better adaptability to waste gas with various components.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A wet desulfurization and denitrification device includes a main support structure and a flue gas conveying and processing mechanism installed within the main support structure.
[0007] The main support structure includes a vertically extending main support outer shell, and a main support column coaxial with it is fixed inside the main support outer shell;
[0008] The flue gas conveying and processing mechanism includes an end flue gas conveying pipe fixed at the bottom of the main support outer cylinder shell and arranged in a ring. Multiple end flue gas exhaust nozzles connected to the inside of the end flue gas conveying pipe are fixed on the upper side of the end flue gas conveying pipe.
[0009] The main supporting outer shell forms a vertically extending and annular desulfurization and denitrification treatment chamber, which is filled with desulfurization and denitrification treatment slurry.
[0010] Preferably, an initial mixing input mechanism is provided on the outside of the main support outer cylinder shell. The initial mixing input mechanism includes an annular hollow flue gas mixing and collecting ring shell fixed on the outside of the main support outer cylinder shell and arranged coaxially therewith. The flue gas mixing and collecting ring shell is connected to the end flue gas conveying pipe through multiple end flue gas connecting pipes. The end flue gas connecting pipe has a flue gas conveying one-way valve.
[0011] The top of the flue gas mixing and collecting ring is fixed with multiple vertically extending original flue gas conveying pipes that are connected to the inside of the ring. A treatment agent conveying pipe is fixed on the side wall of the original flue gas conveying pipe, and the output end of the treatment agent conveying pipe extends into the inside of the original flue gas conveying pipe.
[0012] Explanation: The initial mixing input mechanism can pre-supply ozone to mix with the flue gas to be treated, oxidizing NO in the flue gas to NO2, and converting the water-insoluble NO to the water-soluble NO2. This can significantly improve the denitrification efficiency and reduce the dependence on a strongly acidic environment in subsequent treatment processes.
[0013] Preferably, the main support outer shell is provided with a variable cross-section flow guiding mechanism, which includes a variable cross-section flow guiding inner ring shell fixed to the outside of the main support column and arranged coaxially therewith, and a variable cross-section flow guiding outer ring shell surrounding the outside of the variable cross-section flow guiding inner ring shell and arranged coaxially therewith.
[0014] A flue gas treatment channel is formed between the outer side of the variable cross-section guide inner ring shell and the inner side of the variable cross-section guide outer ring shell.
[0015] The variable cross-section guiding inner ring shell has multiple periodically arranged inner ring shell guiding convex sections and inner ring shell guiding concave sections along its axial direction.
[0016] The variable cross-section guiding outer ring shell has multiple periodically arranged outer ring shell guiding protrusions and outer ring shell guiding concave sections along its axial direction;
[0017] The top of the main support outer shell is fixed with multiple downward-facing lifting drive receiving cylinders. The top of the variable cross-section guide outer ring shell is fixed with multiple vertically extending lifting drive support columns. The upper ends of the multiple lifting drive support columns extend into the interior of each lifting drive receiving cylinder. The lifting drive receiving cylinder is equipped with a lifting drive rod for driving the variable cross-section guide outer ring shell to move up and down.
[0018] Note: The flue gas treatment channel with variable cross-section design achieves multiple benefits such as enhanced gas-liquid mixing, homogenized flow field, and reduced energy consumption through optimization of hydrodynamic characteristics, thereby improving the efficiency and stability of the desulfurization and denitrification process.
[0019] Preferably, the lower end of the variable cross-section guide outer ring shell is fixed with an outer ring sealing fit ring arranged coaxially with it, and the lower end of the outer ring sealing fit ring is in sealed contact with the inner wall of the main body support outer cylinder shell.
[0020] A treatment liquid return channel is formed between the outer side of the variable cross-section guide outer ring shell and the inner side of the main support outer cylinder shell. The outer ring has multiple lower return flow holes for connecting the flue gas treatment channel and the treatment liquid return channel.
[0021] The upper sidewall of the variable cross-section flow guide outer ring shell has multiple upper overflow holes that run radially through it;
[0022] Multiple vertically extending fluid return propellers are fixed inside the fluid return channel.
[0023] Explanation: This structural design can promote the circulation of ammonia solution between the flue gas treatment channel and the treatment liquid return channel, thereby promoting the reaction between the flue gas and the ammonia solution.
[0024] Preferably, the bottom of the inner shell of the main support has an annular sedimentation collection groove, and the lower end of the outer shell of the main support has a plurality of sedimentation discharge pipes connected to the sedimentation collection groove, and the sedimentation discharge pipes have sedimentation discharge control valves.
[0025] Note: During the flue gas treatment process, the sediment generated inside the outer shell of the main support will accumulate in the sediment collection groove, which will facilitate the unified discharge of these sediments through the sediment discharge pipe.
[0026] Compared with the prior art, the beneficial effects of this utility model are reflected in the following aspects:
[0027] 1. The present invention has a reasonable structural design. The initial mixing input mechanism can pre-deliver ozone to mix with the flue gas to be treated, so that the NO in the flue gas to be treated is oxidized to NO2, and the water-insoluble NO is oxidized to the water-soluble NO2. This can significantly improve the denitrification efficiency and reduce the dependence on the strong acid environment in the subsequent treatment process.
[0028] 2. This utility model is easy to operate. The flue gas treatment channel with variable cross-section design achieves multiple benefits such as enhanced gas-liquid mixing, uniform flow field, and reduced energy consumption through optimized hydrodynamic characteristics, thereby improving the efficiency and stability of the desulfurization and denitrification process.
[0029] 3. The treatment liquid reflux propeller of this utility model can drive the ammonia solution in the treatment liquid reflux channel to flow from bottom to top. During this process, the ammonia solution at the lower end of the flue gas treatment channel will enter the treatment liquid reflux channel through the lower reflux hole, and the ammonia solution at the upper end of the treatment liquid reflux channel will enter the flue gas treatment channel through the upper overflow hole, so that the ammonia solution in the flue gas treatment channel presents a top-to-bottom flow state, thereby promoting the circulation of the ammonia solution between the flue gas treatment channel and the treatment liquid reflux channel, and promoting the reaction between the flue gas and the ammonia solution. Attached Figure Description
[0030] Figure 1 This is the front view of this utility model;
[0031] Figure 2 This is a schematic diagram of the initial mixed input mechanism of this utility model.
[0032] In the diagram, 10-Main support structure, 11-Main support outer shell, 12-Main support column, 13-Sedimentation collection groove, 131-Sedimentation discharge pipe, 132-Sedimentation discharge control valve, 20-Flue gas conveying and processing mechanism, 200-Desulfurization and denitrification processing chamber, 201-Flue gas processing channel, 202-Processing liquid return channel, 21-End flue gas conveying pipe, 211-End flue gas discharge nozzle, 22-Initial mixing input mechanism, 221-Flue gas mixing and collecting ring shell, 222-End flue gas connecting pipe, 2220-Flue gas conveying check valve, 22 3-Original flue gas conveying pipe, 224-Treatment agent conveying pipe, 23-Variable cross-section guide mechanism, 231-Variable cross-section guide inner ring shell, 2311-Inner ring shell guide protrusion, 2312-Inner ring shell guide concave section, 232-Variable cross-section guide outer ring shell, 2321-Outer ring shell guide protrusion, 2322-Outer ring shell guide concave section, 233-Lifting drive receiving cylinder, 234-Lifting drive support column, 235-Lifting drive rod, 24-Outer ring sealed fitting ring, 241-Lower section return flow hole, 242-Upper section overflow flow hole, 243-Treatment liquid return propeller. Detailed Implementation
[0033] The following is combined with Figures 1-2 This utility model will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of their respective main views or structural schematic diagrams.
[0034] Example 1:
[0035] A wet desulfurization and denitrification device, such as Figure 1 As shown, it includes a main support structure 10 and a flue gas conveying and processing mechanism 20 disposed within the main support structure 10.
[0036] The main support structure 10 includes a vertically extending main support outer shell 11, and a main support column 12 coaxial with it is fixed inside the main support outer shell 11.
[0037] The top of the main supporting outer shell 11 has a purified exhaust gas discharge pipe 110 that is connected to its interior;
[0038] The flue gas conveying and processing mechanism 20 includes an end flue gas conveying pipe 21 fixed to the bottom of the main support outer cylinder shell 11 and arranged in a ring. Multiple end flue gas exhaust nozzles 211 connected to the inside of the end flue gas conveying pipe 21 are fixed on the upper side of the end flue gas conveying pipe 21.
[0039] The main supporting outer shell 11 forms a vertically extending and annular desulfurization and denitrification treatment chamber 200, which is filled with desulfurization and denitrification treatment slurry.
[0040] like Figure 1 As shown, an initial mixing input mechanism 22 is provided on the outer side of the main supporting outer shell 11, such as... Figure 2 As shown, the initial mixing input mechanism 22 includes an annular hollow flue gas mixing and collecting ring shell 221 fixed to the outside of the main support outer cylinder shell 11 and arranged coaxially therewith. The flue gas mixing and collecting ring shell 221 is connected to the end flue gas conveying pipe 21 through multiple end flue gas connecting pipes 222. The end flue gas connecting pipe 222 has a flue gas conveying one-way valve 2220 inside.
[0041] The flue gas delivery check valve 2220 is a commercially available check valve in the prior art. The flue gas delivery check valve 2220 allows flue gas to enter the end flue gas delivery pipe 21 only from the flue gas mixing and collecting ring shell 221 through the end flue gas connecting pipe 222.
[0042] The top of the flue gas mixing and collecting ring shell 221 is fixed with multiple vertically extending original flue gas conveying pipes 223 that are connected to its interior. A treatment agent conveying pipe 224 is fixed on the side wall of the original flue gas conveying pipe 223, and the output end of the treatment agent conveying pipe 224 extends into the interior of the original flue gas conveying pipe 223.
[0043] Example 2:
[0044] Based on Example 1, such as Figure 1 As shown, the main support outer cylinder shell 11 is provided with a variable cross-section flow guiding mechanism 23. The variable cross-section flow guiding mechanism 23 includes a variable cross-section flow guiding inner ring shell 231 fixed to the outside of the main support column 12 and arranged coaxially with it. The main support outer cylinder shell 11 is provided with a variable cross-section flow guiding outer ring shell 232 surrounding the outside of the variable cross-section flow guiding inner ring shell 231 and arranged coaxially with it.
[0045] A flue gas treatment channel 201 is formed between the outer side of the variable cross-section guide inner ring shell 231 and the inner side of the variable cross-section guide outer ring shell 232;
[0046] like Figure 2 As shown, the variable cross-section inner annular shell 231 has multiple periodically arranged inner annular shell guiding protrusions 2311 and inner annular shell guiding concave sections 2312 along its axial direction.
[0047] like Figure 2 As shown, the variable cross-section flow guiding outer ring shell 232 has multiple periodically arranged outer ring shell flow guiding protrusions 2321 and outer ring shell flow guiding concave sections 2322 along its axial direction;
[0048] like Figure 1As shown, the top of the main supporting outer cylinder shell 11 is fixed with multiple downward-facing lifting drive receiving cylinders 233, and the top of the variable cross-section flow guiding outer ring shell 232 is fixed with multiple vertically extending lifting drive support columns 234. The upper ends of the multiple lifting drive support columns 234 extend into the interior of each lifting drive receiving cylinder 233. The lifting drive receiving cylinder 233 is provided with a lifting drive rod 235 for driving the variable cross-section flow guiding outer ring shell 232 to move up and down. The lifting drive rod 235 is an existing electrically controlled telescopic rod driven by a servo motor. The outer rod end of the lifting drive rod 235 is fixedly connected to the top of the lifting drive receiving cylinder 233, and the inner rod end of the lifting drive rod 235 is fixedly connected to the upper end of the lifting drive support column 234.
[0049] like Figure 2 As shown, the lower end of the variable cross-section flow guiding outer ring shell 232 is fixed with an outer ring sealing ring 24 arranged coaxially with it, and the lower end of the outer ring sealing ring 24 is in sealed contact with the inner wall of the main body support outer cylinder shell 11.
[0050] A treatment liquid return channel 202 is formed between the outer side of the variable cross-section guide outer ring shell 232 and the inner side of the main support outer cylinder shell 11. The outer ring sealing ring 24 has multiple lower section return flow holes 241 for connecting the flue gas treatment channel 201 and the treatment liquid return channel 202.
[0051] The upper sidewall of the variable cross-section flow guide outer ring shell 232 has multiple upper overflow holes 242 that extend radially through it;
[0052] like Figure 1 As shown, multiple vertically extending processing fluid return propellers 243 are fixed inside the processing fluid return channel 202;
[0053] The process fluid return thruster 243 is a ducted propeller thruster of the prior art. The lower end of the process fluid return thruster 243 is the input end, and the upper end of the process fluid return thruster 243 is the output end.
[0054] Example 3:
[0055] Based on Example 2, such as Figure 1 As shown, the bottom of the inner wall of the main support outer cylinder shell 11 has an annular sedimentation collection groove 13. The lower end of the main support outer cylinder shell 11 is fixed with multiple sedimentation discharge pipes 131 that are connected to the sedimentation collection groove 13. The sedimentation discharge pipes 131 are equipped with sedimentation discharge control valves 132.
[0056] It should be noted that the sediment discharge control valve 132 used in this application adopts existing technology and is not specifically limited here. Those skilled in the art can choose it according to their needs, as long as it can achieve the technical solution of this application.
[0057] In practical application, the desulfurization and denitrification slurry filled inside the main supporting outer shell 11 is a 12% (w / w) ammonia solution, used to purify and absorb SO2 and NO in the flue gas to be treated. x ;
[0058] The flue gas discharged from the factory is driven by a fan and fed into each original flue gas conveying pipe 223. At the same time, ozone is introduced into the original flue gas conveying pipe 223 through each treatment agent conveying pipe 224 using an air conveyor. The ozone mixes with the flue gas to be treated during the flow inside the original flue gas conveying pipe 223. The oxidation effect of the ozone oxidizes the NO in the flue gas to NO2. Then the flue gas to be treated enters the flue gas mixing and collecting ring shell 221. The flue gas inside the flue gas mixing and collecting ring shell 221 enters the terminal flue gas conveying pipe 21 through each terminal flue gas connecting pipe 222. Finally, the flue gas in the terminal flue gas conveying pipe 21 is discharged from each terminal flue gas exhaust nozzle 211. The flue gas flows from bottom to top in the flue gas treatment channel 201, so that the flue gas comes into full contact with the ammonia solution to generate a mixed solution of ammonium sulfate and ammonium nitrate. This mixed solution can be used as a raw material for compound fertilizer after oxidation.
[0059] The purified flue gas is finally discharged through the purified exhaust pipe 110.
[0060] As the flue gas flows from bottom to top in the flue gas treatment channel 201, the cross-sectional change of the entire flue gas treatment channel 201 is adjusted by the variable cross-section guide mechanism 23, thereby adjusting the flow rate of the flue gas and the mixing effect with ammonia water.
[0061] The concave and convex sections of the variable cross-section inner ring shell 231 and the variable cross-section outer ring shell 232 are relative to their respective outer surfaces. When the inner ring shell guide convex section 2311 of the variable cross-section inner ring shell 231 and the outer ring shell guide convex section 2321 of the variable cross-section outer ring shell 232 are at the same horizontal height, the cross-section of the flue gas treatment channel 201 from bottom to top is uniform. When the inner ring shell guide convex section 2311 of the variable cross-section inner ring shell 231 and the outer ring shell guide convex section 2321 of the variable cross-section outer ring shell 232 are misaligned in the vertical direction, the inner ring shell guide convex section 2311 and the outer ring shell guide concave section 2322 will... A narrower flue gas treatment channel 201 is formed, and a wider flue gas treatment channel 201 is formed between the inner ring shell guide concave section 2312 and the outer ring shell guide convex section 2321. At this time, the cross-section of the flue gas treatment channel 201 from bottom to top will show periodic changes. When the flue gas flows from bottom to top through the narrower flue gas treatment channel 201, it will be in a local acceleration state. Then, when the flue gas flows from bottom to top through the wider flue gas treatment channel 201, the flue gas velocity will decrease, but the flue gas will diffuse in all directions. Whether the flue gas is in a local acceleration state or a deceleration and diffusion state after acceleration, it is conducive to the full mixing of flue gas and ammonia water, and to more thorough flue gas treatment.
[0062] The extension or retraction of the inner rod of the lifting drive rod 235 can drive the lifting drive support column 234, together with the entire variable cross-section guide outer ring shell 232, to move down or up in the vertical direction, thereby adjusting the position of the variable cross-section guide outer ring shell 232 relative to the variable cross-section guide inner ring shell 231 in the vertical direction, and thus adjusting the cross-sectional changes of the flue gas treatment channel 201 from bottom to top, so as to achieve a more thorough mixing and contact between flue gas and ammonia water;
[0063] The treatment liquid return propeller 243 can drive the ammonia solution in the treatment liquid return channel 202 to flow from bottom to top. During this process, the ammonia solution at the lower end of the flue gas treatment channel 201 will enter the treatment liquid return channel 202 through the lower return flow hole 241, and the ammonia solution at the upper end of the treatment liquid return channel 202 will enter the flue gas treatment channel 201 through the upper overflow flow hole 242, so that the ammonia solution in the flue gas treatment channel 201 presents a top-to-bottom flow state, thereby promoting the circulation of the ammonia solution between the flue gas treatment channel 201 and the treatment liquid return channel 202, and promoting the reaction between the flue gas and the ammonia solution.
Claims
1. A wet desulfurization and denitrification device, characterized in that, It includes a main support structure (10) and a flue gas conveying and processing mechanism (20) disposed within the main support structure (10); The main support structure (10) includes a vertically extending main support outer shell (11), and a main support column (12) coaxial with it is fixed inside the main support outer shell (11). The flue gas conveying and processing mechanism (20) includes an end flue gas conveying pipe (21) fixed at the bottom of the main body support outer cylinder shell (11) and arranged in a ring. Multiple end flue gas exhaust nozzles (211) connected to the inside of the end flue gas conveying pipe (21) are fixed on the upper side of the end flue gas conveying pipe (21). The main supporting outer cylinder shell (11) forms a vertically extending and annular desulfurization and denitrification treatment chamber (200), which is filled with desulfurization and denitrification treatment slurry.
2. The wet desulfurization and denitrification device according to claim 1, characterized in that, An initial mixing input mechanism (22) is provided on the outside of the main support outer cylinder shell (11). The initial mixing input mechanism (22) includes an annular hollow flue gas mixing and collecting ring shell (221) fixed on the outside of the main support outer cylinder shell (11) and arranged coaxially therewith. The flue gas mixing and collecting ring shell (221) is connected to the end flue gas conveying pipe (21) through multiple end flue gas connecting pipes (222). The end flue gas connecting pipe (222) has a flue gas conveying one-way valve (2220) inside. The top of the flue gas mixing and collecting ring shell (221) is fixed with multiple vertically extending original flue gas conveying pipes (223) that are connected to its interior. A treatment agent conveying pipe (224) is fixed on the side wall of the original flue gas conveying pipe (223), and the output end of the treatment agent conveying pipe (224) extends into the interior of the original flue gas conveying pipe (223).
3. The wet desulfurization and denitrification device according to claim 1, characterized in that, The main support outer cylinder shell (11) is provided with a variable cross-section flow guiding mechanism (23). The variable cross-section flow guiding mechanism (23) includes a variable cross-section flow guiding inner ring shell (231) fixed to the outside of the main support column (12) and arranged coaxially with it. The main support outer cylinder shell (11) is provided with a variable cross-section flow guiding outer ring shell (232) surrounding the outside of the variable cross-section flow guiding inner ring shell (231) and arranged coaxially with it. A flue gas treatment channel (201) is formed between the outer side of the variable cross-section guide inner ring shell (231) and the inner side of the variable cross-section guide outer ring shell (232); The variable cross-section guiding inner ring shell (231) has multiple periodically arranged inner ring shell guiding protrusions (2311) and inner ring shell guiding concave sections (2312) along its axial direction; The variable cross-section flow-guiding outer ring shell (232) has multiple periodically arranged outer ring shell flow-guiding protrusions (2321) and outer ring shell flow-guiding concave sections (2322) along its axial direction; The main supporting outer shell (11) has multiple downward-facing lifting drive receiving cylinders (233) fixed on its top. The variable cross-section flow guiding outer ring shell (232) has multiple vertically extending lifting drive support columns (234) fixed on its top. The upper ends of the multiple lifting drive support columns (234) extend into the interior of each of the lifting drive receiving cylinders (233). The lifting drive receiving cylinder (233) is provided with a lifting drive rod (235) for driving the variable cross-section flow guiding outer ring shell (232) to move up and down.
4. A wet desulfurization and denitrification device according to claim 3, characterized in that, The lower end of the variable cross-section flow guiding outer ring shell (232) is fixed with an outer ring sealing ring (24) arranged coaxially with it, and the lower end of the outer ring sealing ring (24) is in sealed contact with the inner side wall of the main body support outer cylinder shell (11). The outer side of the variable cross-section guide outer ring shell (232) and the inner side of the main body support outer cylinder shell (11) form a treatment liquid return channel (202). The outer ring sealing ring (24) has a plurality of lower section return flow holes (241) for connecting the flue gas treatment channel (201) and the treatment liquid return channel (202). The variable cross-section flow guide outer ring shell (232) has multiple upper overflow holes (242) that extend radially through its side wall. Multiple vertically extending fluid return propellers (243) are fixed inside the fluid return channel (202).
5. A wet desulfurization and denitrification device according to claim 1, characterized in that, The bottom of the main supporting outer cylinder shell (11) has an annular sedimentation collection groove (13). The lower end of the main supporting outer cylinder shell (11) is fixed with a plurality of sedimentation discharge pipes (131) that are connected to the sedimentation collection groove (13). The sedimentation discharge pipes (131) are equipped with sedimentation discharge control valves (132).