A multi-stage wet desulfurization and dust removal unit and a CPM collaborative treatment method

Abstract

The present application relates to desulfurization and dust removal technical field, propose a kind of multistage wet desulfurization and dust removal unit and CPM collaborative processing method, it can be matched with the flue gas after wet processing and carry out multistage dust removal operation, in operation process, not only to the water vapor and dust particles carried by flue gas form hierarchical interception and recovery, also effectively extend the contact reaction time of flue gas and water vapor, significantly improve the processing quality and efficiency of flue gas desulfurization and dust removal, practicality is further enhanced, including absorption tower cylinder, it further includes composite processing unit and multiple primary processing units, absorption tower cylinder includes base cylinder, inner through cylinder and outer cover cylinder, inner through cylinder is fixedly connected at the top of base cylinder, inner through cylinder is sleeved in outer cover cylinder, and contact seal is arranged between inner through cylinder and outer cover cylinder, inner lining support frame is arranged in base cylinder, outer cover cylinder is fixedly connected with inner lining support frame, base cylinder is fixedly connected outside inner lining support frame, multiple primary processing units are fixedly installed in inner lining support frame.

Description

Technical Field

[0001] This invention relates to the field of desulfurization and dust removal technology, specifically to a multi-stage wet desulfurization and dust removal unit and a CPM synergistic treatment method. Background Technology

[0002] As is well known, CPM (Condensable Particulate Matter) refers to fine particulate matter that exists in a gaseous state in the flue and condenses into a liquid or solid state within seconds of leaving the flue due to cooling. Multi-stage wet desulfurization and dust removal is a process that combines multiple desulfurization and dust removal operations for flue gas. To facilitate high-quality flue gas treatment, this application proposes a multi-stage wet desulfurization and dust removal unit and a CPM synergistic treatment method.

[0003] A search revealed that Chinese patent application number CN202122465794.7 discloses a multi-stage suction wet desulfurization and denitrification dust collector. Its general description includes support legs, a treatment tank, an exhaust gas catalyst, a movable cover, and an inlet pipe. The movable cover is fixed to the upper end of the treatment tank via a ring array of fixing buckles. An exhaust port is located in the middle of the movable cover. The exhaust gas catalyst is fixed to the middle of the upper surface of the movable cover and is connected to the exhaust port. An exhaust pipe is installed at the upper end of the exhaust gas catalyst. An exhaust fan is fixed to the upper part of the exhaust pipe, and a flue gas detection head is fixed to one side of the lower part of the exhaust pipe. An audible and visual alarm is fixed to one end of the upper surface of the movable cover. An air inlet pipe is connected to the upper side of one side of the treatment tank. A Chinese patent application (CN201620257133.1) discloses a wet flue gas desulfurization and synergistic dust removal absorption tower, equipped with a water inlet pipe and a drain pipe connected to the lower middle of the treatment tank. It is roughly described as including an absorption tower body, multi-stage demisters, several spray layers, several liquid-holding plates, a slurry pool, and a flue gas inlet channel. The multi-stage demisters, spray layers, and slurry pool are arranged sequentially from top to bottom within the absorption tower body. A clean flue gas outlet is located at the top of the absorption tower body, and a flue gas inlet connected to the flue gas inlet channel is located on the side of the absorption tower body. The flue gas inlet is located between the slurry pool and the spray layers. The liquid-holding plates are located at the bottom of each spray layer and between each spray layer. In use, it can achieve sulfur dioxide removal.

[0004] While the aforementioned existing technical solutions can achieve flue gas purification, both technologies employ a straight-flow flue gas through the filtration unit. Taking the spray desulfurization process as an example, during actual operation, the water mist generated in the spray zone has a small particle size and light weight. After the flue gas passes through the spray zone, it is very easy to carry a large amount of water vapor out. This entrained water vapor not only contains undissolved particulate matter in the flue gas, but also contains mixed substances formed by the combination of water vapor and pollutants, which limits the overall flue gas treatment effect and leaves considerable room for improvement in treatment quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-stage wet desulfurization and dust removal unit and a CPM synergistic treatment method. It can be used in conjunction with the wet-treated flue gas for multi-stage dust removal. During the operation, it not only achieves graded interception and recovery of water vapor and dust particles carried by the flue gas, but also effectively extends the contact reaction time between the flue gas and water vapor, significantly improving the treatment quality and efficiency of flue gas desulfurization and dust removal, and further enhancing its practicality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage wet desulfurization and dust removal unit, comprising an absorption tower body, a composite treatment unit, and multiple primary treatment units. The absorption tower body includes a base cylinder, an inner cylinder, and an outer casing cylinder. The inner cylinder is fixedly connected to the top end of the base cylinder and is sleeved inside the outer casing cylinder, with a contact seal between the inner cylinder and the outer casing cylinder. An inner lining support frame is provided inside the base cylinder, and the outer casing cylinder is fixedly connected to the inner lining support frame. The base cylinder is fixedly connected outside the inner lining support frame. Each of the primary processing units is fixedly installed inside the inner liner support frame. Multiple primary processing units are located inside the base cylinder. The composite processing unit includes a synchronous mounting shaft, which is rotatably connected inside the inner liner support frame. Multiple outer guide vanes and multiple inner guide vanes are mounted on the synchronous mounting shaft. Multiple outer guide vanes are located outside the inner tube, multiple outer guide vanes are located inside the outer cover cylinder, and multiple inner guide vanes are located inside the inner tube. A variable frequency motor is installed on the inner liner support frame, and the variable frequency motor is used to drive the synchronous mounting shaft to rotate.

[0007] Preferably, the inner lining support frame has two horizontal frames fixedly connected inside, and each of the two horizontal frames has multiple mounting rings fixedly connected to it. The multiple primary processing units are located in the multiple mounting rings respectively, and the two adjacent mounting rings are relatively staggered.

[0008] Preferably, each of the primary processing units includes a flow guide tube, which is installed in one of the mounting rings. A plurality of fixed guide vanes are fixedly connected inside the flow guide tube. An inverted conical cap is fixedly connected to the top of the flow guide tube. A flip ring is provided on the outer ring of the inverted conical cap. An air passage is provided between the inverted conical cap and the flow guide tube.

[0009] Preferably, the drainage cylinder, inner tube, and outer cover cylinder are respectively provided with a slit cavity, an inner slit cavity, and an outer slit cavity. The inner ring surface of the drainage cylinder, inner tube, and outer cover cylinder is respectively provided with a slit mouth group, an inner slit mouth group, and an outer slit mouth group. The slit mouth group, inner slit mouth group, and outer slit mouth group are respectively connected to the slit cavity, the inner slit cavity, and the outer slit cavity. The bottom end of the drainage cylinder, inner tube, and outer cover cylinder is respectively provided with a drain pipe, an inner drain pipe, and an outer drain pipe. The inner drain pipe and the outer drain pipe are both connected to the interior of the base cylinder.

[0010] Preferably, the top end of the inner lining support frame is fixedly connected to an outer support frame, the outer support frame is provided with a rotating mounting platform, the synchronous mounting shaft is rotatably connected to the rotating mounting platform, the variable frequency motor is mounted on the outer support frame and is located outside the outer cover cylinder, the output shaft of the variable frequency motor is connected to a drive shaft, and both the drive shaft and the synchronous mounting shaft are equipped with drive bevel gears, which mesh with each other for transmission.

[0011] Preferably, an inner mounting ring is fixedly connected to the synchronous mounting shaft, and multiple internally threaded rods are fixedly connected to the inner mounting ring. Multiple outer rotating ring grooves are provided within the inner mounting ring. Multiple inner guide vanes are fixedly connected to internal rotating connecting rings, which are rotatably connected to the multiple outer rotating ring grooves. Multiple internally threaded rods are threadedly connected to internally threaded brackets, which are slidably connected to the multiple inner guide vanes. Insertion springs are provided within each of the multiple inner guide vanes, and counterweights are connected to the multiple internally threaded brackets. The multiple insertion springs are fixedly connected to the multiple counterweights.

[0012] Preferably, an outer expansion ring is fixedly connected to the synchronous mounting shaft, and multiple inclined surfaces are provided on the outer ring surface of the outer expansion ring. The multiple outer guide vanes are respectively fixedly connected to the multiple inclined surfaces.

[0013] Preferably, a plurality of vertical rods are fixedly connected to the top end of the inner tube, and a guide cap ring is fixedly connected to the top end of the plurality of vertical rods. The guide cap ring is used to guide the flue gas to expand outward.

[0014] Preferably, the bottom end of the outer casing is provided with a necked section, and the bottom end of the necked section is provided with a sleeve section. The sleeve section is sleeved on the outside of the inner tube, and multiple threaded caps are fixedly connected to the outside of the sleeve section. Each of the multiple threaded caps is threadedly connected to a connecting bolt. The inner tube is provided with multiple insertion slots, and the multiple insertion slots are respectively matched with the multiple connecting bolts.

[0015] A method for co-processing CPM in a multi-stage wet desulfurization and dust removal unit includes the following steps:

[0016] S1. First, complete the assembly of the spray zone of the absorption tower with the base cylinder, so that the base cylinder is located above the spray zone, ensuring that the flue gas treated by the spray zone can flow upward into the base cylinder. Next, install the matching control circuit for the variable frequency motor. By connecting the control circuit, the variable frequency motor is powered on and runs. After the variable frequency motor runs, it drives the synchronous mounting shaft to rotate, which in turn drives the outer guide vane and the inner guide vane to rotate synchronously, preparing for subsequent flue gas treatment.

[0017] S2. Dust- and sulfur-containing flue gas is introduced into the spray zone for preliminary spray treatment. After being treated in the spray zone, the flue gas flows upward into the foundation cylinder. Multiple primary treatment units fixedly installed in the inner lining support frame pre-treat the flue gas. As the flue gas passes through each primary treatment unit in sequence, it comes into full contact with the primary treatment unit. Through collision and collection, most of the large dust particles and some water vapor in the flue gas are removed. During this process, the synchronous mounting shaft drives the outer guide vane to rotate continuously, ensuring smooth flow of flue gas in the foundation cylinder and avoiding flue gas stagnation that would affect the pre-treatment effect.

[0018] S3. After primary pretreatment, the flue gas flows through the inner tube and outer shroud under the action of airflow. When the flue gas flows through the inner tube, the rotating inner guide vanes turbulent the flue gas, so that the flue gas fully contacts the surface of the inner guide vanes and the inner wall of the inner tube, further removing water vapor and fine dust from the flue gas. At the same time, it achieves deep removal of water vapor and precise capture of dust. Meanwhile, the flue gas is dispersed again under the stirring action of the inner guide vanes. Through the continuous operation of the inclined outer guide vanes, the flue gas smoothly enters the outer shroud, completing the third stage of flue gas treatment, and thus achieving CPM synergistic deep treatment of the flue gas.

[0019] S4. After deep treatment, the flue gas is discharged from the top of the outer casing under the guidance of the inner guide vane. During operation, the speed of the variable frequency motor is adjusted according to the real-time feedback of flue gas concentration and treatment effect, and the speed of the synchronous mounting shaft, outer guide vane and inner guide vane are changed to adapt to different flue gas conditions and ensure the long-term stable operation of the entire desulfurization and dust removal unit.

[0020] Compared with existing technologies, the present invention provides a multi-stage wet desulfurization and dust removal unit and a CPM synergistic treatment method, which has the following beneficial effects:

[0021] (1). In this invention, by designing multiple primary treatment units and their installation layout in the absorption tower, the flow direction of the flue gas passing through the spray zone can be adjusted to effectively improve the contact area and contact effect between the flue gas and the primary treatment units, thereby enabling centralized primary interception and recovery of water vapor in the flue gas, reducing the density of water vapor carried by the flue gas, and laying the foundation for subsequent deep treatment.

[0022] (2). In this invention, through the reasonable design of the composite treatment unit, it can cooperate with the exhaust flue gas to complete the secondary and tertiary deep treatment operations, further reduce the particulate matter content and water vapor content in the flue gas, and also play an auxiliary driving role for the flow of flue gas, ensuring smooth flue gas flow. It not only provides auxiliary power for the flow of flue gas in the primary treatment unit, but also provides driving force for the exhaust of flue gas through the external guide vane, ensuring that the flue gas can be discharged normally after treatment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram showing a partial cross-section of the present invention;

[0024] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the local structure at point A;

[0025] Figure 3 For the present invention Figure 1 A magnified schematic diagram of the local structure at point B;

[0026] Figure 4 This is a three-dimensional structural schematic diagram showing a partial cross-section of the synchronous mounting shaft, inner guide vane, and internal threaded frame of the present invention.

[0027] Figure 5 This is a three-dimensional bottom view of the partially disassembled, sectional view of the synchronous mounting shaft, inner guide vane, and internal threaded frame of the present invention.

[0028] Figure 6 This is a three-dimensional structural schematic diagram of the inner air guide vane of the present invention;

[0029] Figure 7 This is a partial cross-sectional three-dimensional structural schematic diagram of the combination of the flow guide tube, fixed flow guide vane, and inverted conical cap of the present invention;

[0030] Figure 8 This is a partial cross-sectional view of the three-dimensional structure of the present invention from a bottom angle;

[0031] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the local structure at point C;

[0032] Figure 10 For the present invention Figure 8 A magnified schematic diagram of the local structure at point D;

[0033] Figure 11 This is a three-dimensional structural diagram of the entire invention;

[0034] Figure 12 This is a three-dimensional structural diagram of the invention viewed from below.

[0035] Figure 13 This is a bottom-view three-dimensional structural diagram of the basic cylinder, inner cylinder, and guide cap ring of the present invention.

[0036] Figure 14 This is a schematic diagram of the flue gas flow path of the present invention.

[0037] In the diagram: 1. Base cylinder; 2. Inner cylinder; 3. Outer casing cylinder; 4. Inner lining support frame; 5. Synchronous mounting shaft; 6. Outer guide vane; 7. Inner guide vane; 8. Variable frequency motor; 9. Horizontal frame; 10. Mounting ring; 11. Drainage cylinder; 12. Fixed guide vane; 13. Inverted conical cap; 14. Flip ring; 15. Slit cavity; 16. Inner slit cavity; 17. Outer slit cavity; 18. Slit inlet assembly; 19. Inner slit inlet assembly; 20. Outer slit inlet assembly; 21. Drainage pipe; 22. Inner drain 23. Outlet flow pipe; 24. Outer support frame; 25. Rotary mounting platform; 26. Drive shaft; 27. Drive bevel gear; 28. Inner mounting ring; 29. ​​Internal threaded rod; 30. Outer rotating ring groove; 31. Inner rotating ring; 32. Internal threaded frame; 33. Insertion spring; 34. Counterweight; 35. Outer enlarging ring; 36. Inclined surface; 37. Vertical rod; 38. Guide cap ring; 39. Necked section; 40. Fitting section; 41. Threaded cap; 42. Connecting bolt; 43. Insertion groove. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] For examples, please refer to Figures 1-14A multi-stage wet desulfurization and dust removal unit includes an absorption tower body, a composite treatment unit, and multiple primary treatment units. The absorption tower body includes a base cylinder 1, an inner cylinder 2, and an outer casing cylinder 3. The inner cylinder 2 is fixedly connected to the top of the base cylinder 1 and is fitted inside the outer casing cylinder 3, with a contact seal between the inner cylinder 2 and the outer casing cylinder 3. The bottom end of the outer casing cylinder 3 has a necked section 39, and the bottom end of the necked section 39 has a fitting section 40, which is fitted onto the outer side of the inner cylinder 2. Multiple threaded caps are fixedly connected to the outer side of the fitting section 40. 41. Multiple threaded caps 41 are threadedly connected to connecting bolts 42. Multiple insertion slots 43 are provided on the inner cylinder 2, and the multiple insertion slots 43 respectively match the multiple connecting bolts 42. An inner lining support frame 4 is provided inside the base cylinder 1. The outer cover cylinder 3 is fixedly connected to the inner lining support frame 4. The base cylinder 1 is fixedly connected to the outside of the inner lining support frame 4. Multiple primary processing units are fixedly installed inside the inner lining support frame 4. Multiple vertical rods 37 are fixedly connected to the top of the inner cylinder 2. Guide cap rings 38 are fixedly connected to the top of the multiple vertical rods 37. 8 is used to guide the flue gas outward. Multiple primary treatment units are located inside the base cylinder 1. Two horizontal frames 9 are fixedly connected inside the inner lining support frame 4. Multiple mounting rings 10 are fixedly connected to each of the two horizontal frames 9. Multiple primary treatment units are located inside the multiple mounting rings 10. The two adjacent mounting rings 10 are staggered relative to each other. Each primary treatment unit includes a guide tube 11. Multiple guide tubes 11 are installed inside the multiple mounting rings 10. Multiple fixed guide vanes 12 are fixedly connected inside the guide tubes 11. An inverted conical cap 13 is fixedly connected to the top of the 11. A flip ring 14 is provided on the outer ring of the inverted conical cap 13. An air passage is provided between the inverted conical cap 13 and the guide tube 11. Through the design of multiple primary treatment units and their installation layout in the absorption tower, the flow direction of the flue gas passing through the spray zone can be turbulently adjusted, effectively improving the contact area and contact effect between the flue gas and the primary treatment unit. This allows for centralized primary interception and recovery of water vapor in the flue gas, reducing the density of water vapor carried by the flue gas and laying the foundation for subsequent deep treatment.

[0040] It should be further explained that the composite processing unit includes a synchronous mounting shaft 5, which is rotatably connected to the inner liner support frame 4. Multiple outer guide vanes 6 and multiple inner guide vanes 7 are mounted on the synchronous mounting shaft 5. The outer guide vanes 6 are located outside the inner tube 2, and the outer cover tube 3. The inner guide vanes 7 are located inside the inner tube 2. A variable frequency motor 8 is mounted on the inner liner support frame 4 to drive the synchronous mounting shaft 5 to rotate. An extended support frame 24 is fixedly connected to the top of the inner liner support frame 4. The extended support frame 24 is equipped with a rotating mounting platform 25. The synchronous mounting shaft 5 is rotatably connected to the rotating mounting platform 25. The variable frequency motor 8 is mounted on the extended support frame 24, and the variable frequency motor 8... The variable frequency motor 8 is located outside the outer casing 3. A drive shaft 26 is connected to the output shaft of the variable frequency motor 8. Both the drive shaft 26 and the synchronous mounting shaft 5 are equipped with drive bevel gears 27, which mesh with each other. An inner mounting ring 28 is fixedly connected to the synchronous mounting shaft 5. Multiple internally threaded rods 29 are fixedly connected to the inner mounting ring 28. Multiple outer rotating ring grooves 30 are provided inside the inner mounting ring 28. Multiple inner guide vanes 7 are fixedly connected to inner rotating connecting rings 31. The multiple inner rotating connecting rings 31 are rotatably connected to the multiple outer rotating ring grooves 30 respectively. Multiple internally threaded rods 29 are threadedly connected to internally threaded brackets 32. The multiple internally threaded brackets 32 are slidably connected to the multiple inner guide vanes 7 respectively, and the multiple inner guide vanes... Each plate 7 is equipped with an insertion spring 33, and multiple internal threaded brackets 32 are connected to counterweights 34. Multiple insertion springs 33 are fixedly connected to multiple counterweights 34. An outer expansion ring 35 is fixedly connected to the synchronous mounting shaft 5. Multiple inclined surfaces 36 are provided on the outer ring surface of the outer expansion ring 35, and multiple outer guide vanes 6 are fixedly connected to multiple inclined surfaces 36. Through the rational design of the composite treatment unit, it can cooperate with the exhaust gas to complete secondary and tertiary deep treatment operations, further reducing the particulate matter and moisture content in the exhaust gas. It can also provide auxiliary driving for the flowing exhaust gas, ensuring smooth gas flow. It provides auxiliary power for the flow of exhaust gas in the primary treatment unit and also improves the exhaust gas flow through the outer guide vanes 6. The system provides driving force to ensure that the flue gas can be discharged normally after treatment. The diversion cylinder 11, inner cylinder 2 and outer cover cylinder 3 are respectively provided with a slit cavity 15, an inner slit cavity 16 and an outer slit cavity 17. The inner ring surface of the diversion cylinder 11, inner cylinder 2 and outer cover cylinder 3 is respectively provided with a slit mouth group 18, an inner slit mouth group 19 and an outer slit mouth group 20. The slit mouth group 18, the inner slit mouth group 19 and the outer slit mouth group 20 are respectively connected to the slit cavity 15, the inner slit cavity 16 and the outer slit cavity 17. The bottom end of the diversion cylinder 11, inner cylinder 2 and outer cover cylinder 3 is respectively provided with a diversion pipe 21, an inner diversion pipe 22 and an outer diversion pipe 23. The inner diversion pipe 22 and the outer diversion pipe 23 are both connected to the inside of the base cylinder 1, which can collect and converge the recovered dust and water vapor.

[0041] A CPM collaborative treatment method for a multi-stage wet desulfurization and dust removal unit includes the following steps: First, assemble the spray area of the absorption tower supporting the basic cylinder 1, with the basic cylinder 1 located above the spray area to ensure that the flue gas treated in the spray area can flow upward into the basic cylinder 1. Then, install a supporting control circuit for the variable-frequency motor 8, and energize and operate the variable-frequency motor 8 by connecting the control circuit. After the variable-frequency motor 8 operates, it drives the synchronous mounting shaft 5 to rotate, thereby带动 the outer deflector wing 6 and the inner deflector wing 7 to rotate synchronously, preparing for subsequent flue gas treatment. Introduce the dust-containing and sulfur-containing flue gas into the spray area for preliminary spray treatment, and the flue gas treated in the spray area flows upward into the basic cylinder 1. Use multiple primary treatment units fixedly installed inside the lining support frame 4 to pre-treat the flue gas. When the flue gas passes through each primary treatment unit in sequence, it充分接触 with the primary treatment unit, and most of the large-particle dust and part of the water vapor in the flue gas are removed through collision and collection. During this process, the synchronous mounting shaft 5带动 the outer deflector wing 6 to rotate continuously, ensuring smooth flue gas flow in the basic cylinder 1 and avoiding flue gas retention from affecting the pre-treatment effect. The flue gas after primary pre-treatment先后流过 the inner through cylinder 2 and the outer cover cylinder 3 under the action of the air flow. When the flue gas flows through the inner through cylinder 2, the rotating inner deflector wing 7 acts as a spoiler for the flue gas,使 the flue gas充分接触 with the surface of the inner deflector wing 7 and the inner wall of the inner through cylinder 2, further removing the water vapor and fine dust in the flue gas, and at the same time实现 the deep removal of water vapor and the precise capture of dust. The flue gas is再次分散处理 under the agitation of the inner deflector wing 7, and the inclined outer deflector wing 6 rotates continuously to辅助 the flue gas顺利进入 the outer cover cylinder 3, completing the third-stage treatment of the flue gas, and进而实现 the CPM collaborative deep treatment of the flue gas. The flue gas after deep treatment is排出 from the top of the outer cover cylinder 3 under the引流作用 of the inner deflector wing 7. During the operation process, adjust the speed of the variable-frequency motor 8 according to the real-time feedback of the flue gas concentration and treatment effect, change the speeds of the synchronous mounting shaft 5, the outer deflector wing 6, and the inner deflector wing 7 to适配 different flue gas conditions, and ensure the long-term stable operation of the entire desulfurization and dust removal unit.

[0042] The variable-frequency motor 8 in this embodiment is a conventional device well-known to those skilled in the art purchased on the market. In this invention, we only use it and do not改进 its structure and function. Its setting method, installation method, and electrical connection method can be debugged and operated by those skilled in the art as required in its user manual, and will not be elaborated here.

[0043] In summary, the working principle of this multi-stage wet desulfurization and dust removal unit is as follows: First, the assembly and debugging of the multi-stage wet desulfurization and dust removal unit are completed. The base cylinder 1 is connected to the spray zone of the absorption tower, ensuring that the base cylinder 1 is stably installed above the spray zone. This allows the flue gas after preliminary spray desulfurization to flow smoothly upwards into the base cylinder 1. Next, the control circuit of the variable frequency motor 8 is connected, and the operating parameters of the variable frequency motor 8 are adjusted to ensure it can stably drive the synchronous mounting shaft 5 to rotate. After the variable frequency motor 8 starts, its output shaft drives the transmission shaft 26 to rotate. The transmission bevel gear 27 on the transmission shaft 26 meshes with the transmission bevel gear 27 on the synchronous mounting shaft 5, thereby driving the synchronous mounting shaft 5 relative to the rotating mounting platform 2. When the synchronous mounting shaft 5 rotates, it synchronously drives the outer expansion ring 35 and the inner mounting ring 28 to rotate. The rotation of the outer expansion ring 35 drives multiple outer guide vanes 6 to rotate synchronously. The outer guide vanes 6 adopt an inclined posture with the side closer to the outer expansion ring 35 higher and the side farther away from the outer expansion ring 35 lower. The corresponding inclination angle of the outer guide vanes 6 is between 15° and 25°. The rotation of the inner mounting ring 28 drives multiple inner guide vanes 7 to rotate together, controlling both the outer guide vanes 6 and the inner guide vanes 7 to be in a stable rotation state, providing turbulence conditions and power support for the subsequent multi-stage treatment of flue gas. When the dust- and sulfur-containing flue gas enters the spray zone of the absorption tower, it first undergoes preliminary spray treatment in the spray zone to remove some sulfur dioxide and large particulate dust in the flue gas. After preliminary treatment The cooled flue gas, carrying a certain amount of water vapor and unremoved fine dust, flows upward under the propulsion of the airflow and smoothly enters the interior of the base cylinder 1. After entering the base cylinder 1, the flue gas flows through each primary treatment unit in sequence. Multiple fixed guide vanes 12 inside the diversion cylinder 11 turbulently disperse the incoming flue gas, creating a turbulent airflow within the diversion cylinder 11. This allows the flue gas to fully contact the inner wall of the diversion cylinder 11. Large dust particles and some water vapor in the flue gas will accumulate on the inner wall of the diversion cylinder 11 under inertial collision. As the amount of adhering material increases, these dust particles and water vapor will accumulate to form droplets. The droplets flow along the inner wall of the diversion cylinder 11 through the slit assembly 18 into the interior of the slit cavity 15, and finally exit through the drain at the bottom of the diversion cylinder 11. The flue gas exits through the flow pipe 21 and flows into the base cylinder 1, completing the primary pretreatment of the flue gas. When the flue gas comes into contact with the inverted conical cap 13 at the top of the guide cylinder 11, the inverted conical cap 13 guides the flue gas, causing it to flow out evenly along the air passage between the inverted conical cap 13 and the guide cylinder 11. At the same time, the flipping ring 14 on the outer ring of the inverted conical cap 13 forms a reverse flow for the flue gas, further disrupting the flow direction of the flue gas. During this process, the synchronous mounting shaft 5 drives the outer guide vane 6 to rotate continuously. The rotation of the outer guide vane 6 creates a slight negative pressure above the base cylinder 1, which helps the flue gas in the base cylinder 1 to flow upward, preventing the flue gas from stagnating in the base cylinder 1 and ensuring that the primary pretreatment can be carried out continuously and stably, effectively improving the efficiency and effect of the primary treatment.

[0044] Furthermore, after primary pretreatment, most of the large dust particles and some moisture are removed from the flue gas. The remaining flue gas, driven by the continuous airflow, flows upward into the inner cylinder 2. The inner guide vane 7 inside the inner cylinder 2 rotates, creating turbulence on the flue gas entering the inner cylinder 2, further dispersing the flue gas into fine airflow streams. This allows the flue gas to fully contact the surface of the inner guide vane 7 and the inner wall of the inner cylinder 2. The remaining fine dust and moisture in the flue gas collide and adhere to the inner guide vane 7 and the inner wall of the inner cylinder 2. These adhered dust and moisture also collect to form droplets. The droplets flow along the inner wall of the inner cylinder 2 through the inner slot assembly 19 into the inner slot cavity 16, and are discharged through the inner drain pipe 22 at the bottom of the inner cylinder 2, finally flowing into the base cylinder 1. This achieves secondary deep treatment of the flue gas. After secondary treatment, the flue gas, guided by the inner guide vane 7, flows out from the top of the inner cylinder 2 and enters the inner cylinder 1. The flue gas enters the area between the inner tube 2 and the outer cover tube 3. At this time, the outer guide vane 6 rotates, which can guide and accelerate the flue gas flowing out of the inner tube 2, so that the flue gas can enter the gap between the inner tube 2 and the outer cover tube 3 evenly. At the same time, the rotation of the outer guide vane 6 will drive and turbulent the flue gas again. The inclined attitude of the outer guide vane 6 can also make the flue gas fully contact the inner wall of the outer cover tube 3. The trace water vapor and fine dust remaining in the flue gas will accumulate on the inner wall of the outer cover tube 3, and after accumulating into droplets, they will enter the outer slot cavity 17 through the outer strip assembly 20, and then be discharged through the outer discharge pipe 23 at the bottom of the outer cover tube 3, and flow into the interior of the base tube 1, completing the three-stage deep treatment of the flue gas. After the three-stage treatment, most of the dust and sulfur dioxide have been removed from the flue gas, and the amount of water vapor carried has been reduced to a lower level. The flue gas after the three-stage treatment will flow upward and be discharged under the auxiliary drive of the outer guide vane 6, completing the desulfurization and dust removal treatment of the entire flue gas.

[0045] Furthermore, throughout the entire flue gas treatment process, staff can adjust the speed of the variable frequency motor 8 via control circuits based on real-time feedback on flue gas concentration and treatment effectiveness. This, in turn, changes the speed of the outer guide vane 6 and the inner guide vane 7. When the flue gas concentration is high, the speed of the variable frequency motor 8 is appropriately increased to enhance the rotational speed of the outer guide vane 6 and the inner guide vane 7, thereby improving the turbulence effect and dust removal and desulfurization capabilities. When the flue gas concentration is low, the speed of the variable frequency motor 8 is reduced, ensuring that the treatment effect meets standards while reducing energy consumption. The current energy-saving operation of the equipment ensures that the mixture of droplets and dust discharged from the inner drain pipe 22, outer drain pipe 23, and branch drain pipe 21 is collected in the base cylinder 1 and discharged for unified treatment. The entire multi-stage wet desulfurization and dust removal unit, through the multi-stage synergistic action of the primary treatment unit, inner cylinder 2, and outer casing 3, combined with the turbulence, driving, and regulation functions of the composite treatment unit, achieves graded interception, water vapor recovery, and deep treatment of flue gas. This effectively extends the contact reaction path between the flue gas and the treatment components, significantly improving the treatment quality of flue gas desulfurization and dust removal. And efficiency, when the rotational speed of the synchronous mounting shaft 5 increases, the counterweight 34 will drive the internal threaded frame 32 to slide along the internal threaded rod 29 under the action of centrifugal force, thereby adjusting the tilt of the inner guide vane 7, so that the inner guide vane 7 can adapt to flue gas with different flow velocities, ensuring that the turbulence and dust removal effect of the flue gas is always in the best state. That is, when the rotational speed of the outer guide vane 6 is high, the flow velocity of the flue gas driven by the outer guide vane 6 will also increase accordingly, so the airflow velocity passing through the inner guide vane 7 will also increase. As the rotational speed of the inner guide vane 7 increases, the tilt angle of the inner guide vane 7 increases under the action of centrifugal force. At this time, the effective driving effect of the inner guide vane 7 on the upward flow of flue gas will decrease, while the collision area between the inner guide vane 7 and the flue gas in the vertical direction will increase. That is, during the rotation of the inner guide vane 7, it can form a longer collision and capture distance with the flue gas, thereby achieving the purpose of optimizing the turbulence and dust removal effect. The insertion spring 33 plays a reset role, and when the rotational speed stabilizes and decreases, it restores the inner guide vane 7 to the preset tilt angle.

[0046] 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 multi-stage wet desulfurization and dust removal unit, comprising an absorption tower body, characterized in that, The absorption tower also includes a composite treatment unit and multiple primary treatment units. The absorption tower body includes a base cylinder, an inner cylinder, and an outer cover cylinder. The inner cylinder is fixedly connected to the top of the base cylinder and is sleeved inside the outer cover cylinder. A contact seal is provided between the inner cylinder and the outer cover cylinder. An inner lining support frame is provided inside the base cylinder. The outer cover cylinder is fixedly connected to the inner lining support frame. The base cylinder is fixedly connected to the outside of the inner lining support frame. Multiple primary treatment units are fixedly installed inside the inner lining support frame and are located inside the base cylinder. The composite treatment unit includes a synchronous mounting shaft. The synchronous mounting shaft is rotatably connected to the inner lining support frame. Multiple outer guide vanes and multiple inner guide vanes are installed on the synchronous mounting shaft. Multiple outer guide vanes are located outside the inner cylinder, multiple outer guide vanes are located inside the outer cover cylinder, and multiple inner guide vanes are located inside the inner cylinder. A variable frequency motor is installed on the inner lining support frame. The variable frequency motor is used to drive the synchronous mounting shaft to rotate. The inner lining support frame has two horizontal frames fixedly connected inside. Each of the two horizontal frames has multiple mounting rings fixedly connected to it. Multiple primary processing units are located inside the multiple mounting rings. The two adjacent mounting rings are staggered relative to each other. Each of the multiple primary processing units includes a flow guide tube. The multiple flow guide tubes are installed inside the multiple mounting rings. Multiple fixed guide vanes are fixedly connected inside the flow guide tube. An inverted conical cap is fixedly connected to the top of the flow guide tube. A flip ring is provided on the outer ring of the inverted conical cap. An air passage is provided between the inverted conical cap and the flow guide tube.

2. The multi-stage wet desulfurization and dust removal unit according to claim 1, characterized in that, The drainage cylinder, inner tube, and outer cover cylinder are respectively provided with a slit cavity, an inner slit cavity, and an outer slit cavity. The inner annular surfaces of the drainage cylinder, inner tube, and outer cover cylinder are respectively provided with a slit mouth group, an inner slit mouth group, and an outer slit mouth group. The slit mouth group, inner slit mouth group, and outer slit mouth group are respectively connected to the slit cavity, the inner slit cavity, and the outer slit cavity. The bottom ends of the drainage cylinder, inner tube, and outer cover cylinder are respectively provided with a drainage pipe, an inner drainage pipe, and an outer drainage pipe. The inner drainage pipe and the outer drainage pipe are both connected to the interior of the base cylinder.

3. The multi-stage wet desulfurization and dust removal unit according to claim 2, characterized in that, An extended support frame is fixedly connected to the top of the inner lining support frame. The extended support frame is provided with a rotating mounting platform. The synchronous mounting shaft is rotatably connected to the rotating mounting platform. The variable frequency motor is mounted on the extended support frame and is located outside the outer cover. A drive shaft is drivenly connected to the output shaft of the variable frequency motor. Both the drive shaft and the synchronous mounting shaft are equipped with drive bevel gears, which mesh with each other for transmission.

4. The multi-stage wet desulfurization and dust removal unit according to claim 3, characterized in that, An inner mounting ring is fixedly connected to the synchronous mounting shaft. Multiple internally threaded rods are fixedly connected to the inner mounting ring. Multiple outer rotating ring grooves are provided inside the inner mounting ring. Multiple inner guide vanes are fixedly connected to internal rotating connecting rings. The multiple internal rotating connecting rings are rotatably connected to the multiple outer rotating ring grooves respectively. Multiple internally threaded rods are threadedly connected to internally threaded brackets. Multiple internally threaded brackets are slidably connected to the multiple inner guide vanes respectively. Insertion springs are provided inside the multiple inner guide vanes. Counterweights are connected to the multiple internally threaded brackets. Multiple insertion springs are fixedly connected to the multiple counterweights respectively.

5. A multi-stage wet desulfurization and dust removal unit according to claim 4, characterized in that, An outer expansion ring is fixedly connected to the synchronous mounting shaft. Multiple inclined surfaces are provided on the outer ring surface of the outer expansion ring, and multiple outer guide vanes are fixedly connected to the multiple inclined surfaces respectively.

6. The multi-stage wet desulfurization and dust removal unit according to claim 5, characterized in that, The top of the inner cylinder is fixedly connected to multiple vertical rods, and the top of the multiple vertical rods is fixedly connected to a guide cap ring, which is used to guide the flue gas to expand outward.

7. A multi-stage wet desulfurization and dust removal unit according to claim 6, characterized in that, The bottom end of the outer casing is provided with a necked section, and the bottom end of the necked section is provided with a sleeve section. The sleeve section is sleeved on the outside of the inner tube, and multiple threaded caps are fixedly connected to the outside of the sleeve section. Each of the multiple threaded caps is threadedly connected to a connecting bolt. The inner tube is provided with multiple insertion slots, and the multiple insertion slots are respectively matched with the multiple connecting bolts.

8. A method for CPM synergistic treatment in a multi-stage wet desulfurization and dust removal unit, characterized in that, The multi-stage wet desulfurization and dust removal unit according to any one of claims 1-7 includes the following steps: S1. First, complete the assembly of the spray zone of the absorption tower with the base cylinder, so that the base cylinder is located above the spray zone, ensuring that the flue gas treated by the spray zone can flow upward into the base cylinder. Next, install the matching control circuit for the variable frequency motor. By connecting the control circuit, the variable frequency motor is powered on and runs. After the variable frequency motor runs, it drives the synchronous mounting shaft to rotate, which in turn drives the outer guide vane and the inner guide vane to rotate synchronously, preparing for subsequent flue gas treatment. S2. Dust- and sulfur-containing flue gas is introduced into the spray zone for preliminary spray treatment. After being treated in the spray zone, the flue gas flows upward into the foundation cylinder. Multiple primary treatment units fixedly installed in the inner lining support frame pre-treat the flue gas. As the flue gas passes through each primary treatment unit in sequence, it comes into full contact with the primary treatment unit. Through collision and collection, most of the large dust particles and some water vapor in the flue gas are removed. During this process, the synchronous mounting shaft drives the outer guide vane to rotate continuously, ensuring smooth flow of flue gas in the foundation cylinder and avoiding flue gas stagnation that would affect the pre-treatment effect. S3. After primary pretreatment, the flue gas flows through the inner tube and outer shroud under the action of airflow. When the flue gas flows through the inner tube, the rotating inner guide vanes turbulent the flue gas, so that the flue gas fully contacts the surface of the inner guide vanes and the inner wall of the inner tube, further removing water vapor and fine dust from the flue gas. At the same time, it achieves deep removal of water vapor and precise capture of dust. Meanwhile, the flue gas is dispersed again under the stirring action of the inner guide vanes. Through the continuous operation of the inclined outer guide vanes, the flue gas smoothly enters the outer shroud, completing the third stage of flue gas treatment, and thus achieving CPM synergistic deep treatment of the flue gas. S4. After deep treatment, the flue gas is discharged from the top of the outer casing under the guidance of the inner guide vane. During operation, the speed of the variable frequency motor is adjusted according to the real-time feedback of flue gas concentration and treatment effect, and the speed of the synchronous mounting shaft, outer guide vane and inner guide vane are changed to adapt to different flue gas conditions and ensure the long-term stable operation of the entire desulfurization and dust removal unit.

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