An auxiliary desulfurization tower top based on tail-end flue gas emission

Abstract

This invention relates to the field of chemical production technology and discloses an auxiliary desulfurization tower top based on tail-end flue gas emissions. The tower includes a desulfurization tower top shell, an exhaust pipe, and an inlet pipe. The exhaust pipe is fixedly connected to the upper surface of the desulfurization tower top shell, and the inlet pipe is fixedly connected to the bottom of the outer wall of the desulfurization tower top shell. A circulation component for circulating flue gas is installed inside the desulfurization tower top shell. Compared to the prior art where the desulfurization slurry is sprayed into an atomized layer, and the flue gas is directly discharged after passing through the atomized layer during the discharge process, the flue gas cannot fully contact the desulfurization slurry due to dead zones inside the equipment. This invention uses a monitoring controller to detect the purified flue gas, preventing it from being discharged outwards and circulating it inside the equipment through a U-shaped pipe. This increases the opportunity for contact with sulfides in the flue gas, thereby improving desulfurization efficiency, reducing the sulfur content in the flue gas, and preventing incompletely desulfurized flue gas from being discharged from the desulfurization tower top shell through the exhaust pipe.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production, and in particular to an auxiliary desulfurization tower top based on tail-end flue gas emission. Background Art

[0002] Scrubbers are equipment used to remove sulfur from industrial exhaust gases. They are used in coal-fired power plants and other industrial processes that require the combustion of high-sulfur fuels. Scrubbers capture sulfur in the gas through spray scrubbing and absorption and convert it into compounds that are easy to handle or discharge after treatment. This helps reduce the sulfur oxide content in the air, thereby reducing air pollution and the formation of acid rain.

[0003] The existing desulfurization tower purifies sulfides in flue gas by spraying desulfurization slurry with a spray device in the tower and exhausting air with a fan to achieve desulfurization. However, this method will cause some flue gas to be discharged without being completely fused with the desulfurization slurry. The incompletely purified sulfur-containing flue gas is directly discharged, which will cause outdoor air pollution and reduce air quality. The fan in the tower is in a constant speed rotation state and the spray angle is in a fixed state, which will cause dead corners inside the desulfurization tower that cannot be fully covered by the desulfurization slurry, resulting in the spray device being unable to efficiently purify the flue gas during the spraying process.

[0004] During the process of the spray device purifying the flue gas inside the spray tower, the desulfurization slurry will carry the particulate matter in the flue gas and adhere to the inner wall of the desulfurization tower, so that the sprayed desulfurization slurry cannot flow down to the collection pool at the lower end of the desulfurization tower in time. The desulfurization slurry is doped with particles for a long time and adheres to the inner wall of the desulfurization tower for a long time, which will cause corrosion to the inner wall of the desulfurization tower and make it uneven. The desulfurization slurry cannot slide down smoothly along the inner wall of the desulfurization tower, and the desulfurization slurry will continue to decrease during use, reducing the number of times the desulfurization slurry is recycled, and the desulfurization slurry cannot fully adsorb sulfides in the flue gas.

[0005] To this end, an auxiliary desulfurization tower top based on tail-end flue gas emission is proposed. Summary of the invention

[0006] The object of the present invention is to provide an auxiliary desulfurization tower top based on tail-end flue gas emission to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an auxiliary desulfurization tower top based on tail-end flue gas emissions, comprising a desulfurization tower top shell, an exhaust pipe and an air intake pipe, wherein the exhaust pipe is fixedly connected to the upper surface of the desulfurization tower top shell, and the air intake pipe is fixedly connected to the bottom of the outer wall of the desulfurization tower top shell, a circulation component for circulating flue gas is arranged inside the desulfurization tower top shell, a uniform spray component for uniform spray desulfurization is arranged inside the desulfurization tower top shell, and a desulfurization slurry collection component for cleaning residual sulfide on the inner wall of the desulfurization tower top shell is arranged inside the desulfurization tower top shell.

[0008] Preferably, the circulation component includes a bracket fixedly connected to the inner wall of the top shell of the desulfurization tower and located above the air inlet pipe, a motor shaft is installed on the side of the upper surface of the bracket away from the inner wall of the top shell of the desulfurization tower, the outer wall of the motor shaft is fixedly connected with fan blades distributed in a circular array, the upper surface of the motor shaft is fixedly connected with a first circular plate, the interior of the first circular plate is symmetrically fixedly connected with a first spring about the axis of the fan blade, the first spring is fixedly connected with a first transmission plate at one end close to the outer wall of the first circular plate, and the first transmission plate is slidably connected to the upper surface of the first circular plate.

[0009] Preferably, the circulation component also includes a limit slot plate fixedly connected to the inner wall of the desulfurization tower top shell and located above the motor shaft, the upper surface of the limit slot plate is provided with a hexagonal slot, the inside of the hexagonal slot is evenly slidably connected with a first slide rod, the outer wall of the first slide rod is fixedly connected with a baffle, the outer side walls of the baffle are fitted with each other, the inner wall of the desulfurization tower top shell and located above the baffle are rotatably connected to the limit plate, the upper ends of the first slide rods are slidably connected to the inside of the limit plate, the inner side of the limit plate is fixedly connected with an L-shaped support rod, the lower surface of the L-shaped support rod is fixedly connected with a second circular plate, the lower surface of the second circular plate is fixedly connected with a second transmission plate in a circular array, the outer wall of the desulfurization tower top shell is symmetrically fixedly connected with a U-shaped tube, the upper ends of the U-shaped tubes are located above the fan blades, and the lower ends of the U-shaped tubes are located below the fan blades, the lower ends of the U-shaped tubes are fixedly connected with a pressurized nozzle, and a second spring is fixedly connected between the upper surface of the limit plate and the inner wall of the exhaust pipe.

[0010] Preferably, the uniform spray assembly includes an electric gear rod installed on the inner wall of the desulfurization tower top shell, the inner wall of the desulfurization tower top shell and located above the electric gear rod is rotatably connected to a first spray rack, the inner wall of the desulfurization tower top shell and located below the electric gear rod is rotatably connected to a second spray rack, the first spray rack and the second spray rack are fixedly connected on the side close to each other, the gear rings of the first spray rack and the second spray rack are meshed with the electric gear rod, the outer wall of the desulfurization tower top shell is fixedly connected to a liquid injection pipe, one end of the liquid injection pipe located inside the desulfurization tower top shell is fixedly connected to a liquid storage box, the upper and lower surfaces of the liquid storage box are rotatably connected to a sealing shaft, the liquid storage box and the inside of the sealing shaft are mutually connected, and the sealing shafts are both connected to the inside of the first spray rack and the second spray rack.

[0011] Preferably, the desulfurization slurry collection assembly includes an L-shaped scraper symmetrically fixedly connected to the lower surface of the second spray frame, and a vertical groove is provided on the side of the L-shaped scraper away from the inner wall of the desulfurization tower top shell, and a hollow slide is slidably connected inside the vertical groove. A quadrilateral hole is penetrated on one side of the L-shaped scraper, and a quadrilateral plate is arranged inside the quadrilateral hole. The interior of the quadrilateral plate is vertically slidably connected to a limit rod, and the upper and lower ends of the limit rod are arranged as inclined surfaces. The upper and lower sides of the inner wall of the L-shaped scraper are provided with inclined grooves matching the limit rod, and the inner edge of the quadrilateral hole and the outer edge of the quadrilateral plate are coated with magnetic coatings with opposite magnetic poles.

[0012] Preferably, the desulfurization slurry collection assembly also includes a second sliding rod slidably connected between the L-shaped scraper bar and the quadrilateral plate, and the end of the second sliding rod close to the inner wall of the desulfurization tower top shell is fixedly connected to a scraper, and the scraper is attached to the side of the L-shaped scraper bar close to the inner wall of the desulfurization tower top shell, and the end of the second sliding rod away from the inner wall of the desulfurization tower top shell is slidably connected to the inside of the hollow slide, and the outer wall of the quadrilateral plate is rotatably connected to a positioning plate, and a third spring is fixedly connected between the second sliding rod and the positioning plate, and connecting rods are symmetrically fixedly connected to the bottom of the inner cavity of the desulfurization tower top shell, and the upper ends of the connecting rods are fixedly connected to triangular plates.

[0013] Preferably, the sides of the first transmission plate and the second transmission plate that are close to each other are both set as inclined surfaces, the diameter of the second circular plate is equal to that of the first circular plate, the interior of the limit plate is provided with six slide grooves inclined from the outer circle to the inner circle in a circular array, the first slide rods are slidably connected to the inside of the slide grooves of the limit plate, the inner cavity of the pressurizing nozzle is stepped-narrowed from the side close to the inner wall of the desulfurization tower top shell to the inside of the desulfurization tower top shell, and the pressurizing nozzle is provided with a strip air outlet on the side away from the inner wall of the desulfurization tower top shell.

[0014] Preferably, spray nozzles are evenly arranged on the side away from the first spray rack and the second spray rack, and pipes are arranged inside the first spray rack and the second spray rack to communicate with the spray nozzles. An injection box is connected to the end of the injection pipe away from the top shell of the desulfurization tower, and a pump is arranged inside the injection box, and desulfurization slurry is stored inside the injection box.

[0015] Preferably, the L-shaped scraper strip has an L-shaped cross section, the outer wall of the L-shaped scraper strip fits against the inner wall of the desulfurization tower top shell, and the height of the triangular plate is equal to the quadrilateral hole.

[0016] Preferably, a monitoring controller is provided on the lower surface of the limit slot plate, the motor shaft speed has two gears, high and low, and the monitoring controller electrically controls the motor shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The first transmission plate slides inside the first circular plate when the centrifugal force increases, so that the rotation of the first transmission plate can drive the limit plate to rotate together through the second transmission plate, so that the interior of the desulfurization tower top shell is blocked by the baffle to form a closed space, so that the incompletely purified flue gas can be circulated and repeatedly purified inside the desulfurization tower top shell. Compared with the prior art, after the desulfurization slurry is sprayed into an atomized layer, the flue gas is directly discharged after passing through the atomized layer during the discharge process. The flue gas cannot fully contact with the desulfurization slurry due to the dead angle inside the equipment. Now, the purified flue gas is detected by a monitoring controller, and when the flue gas is not fully desulfurized, the baffle will be used to block the air outlet of the equipment. The flue gas is blocked so that it cannot be discharged to the outside and circulates inside the equipment through the U-shaped tube, increasing the chance of contact with sulfides in the flue gas, thereby improving the desulfurization efficiency and reducing the sulfur content in the flue gas, avoiding the incompletely desulfurized flue gas from being discharged from the top shell of the desulfurization tower. Repeated desulfurization can increase the sulfur content in the waste liquid, thereby reducing the discharge of waste liquid, helping to reduce pollution to the environment, and reducing the cost and process of treating waste liquid. Through the variable speed rotation of the motor shaft, the blowing path and blowing airflow intensity of the flue gas inside the top shell of the desulfurization tower can be changed, so that the flue gas and the desulfurization slurry are mixed more evenly, and at the same time, the desulfurization slurry attached to the surface of the fan blade is thrown away by the centrifugal force during the variable speed rotation of the fan blade;

[0019] 2. By blowing the flue gas to the pressurized nozzle inside the U-shaped tube, the wind speed of the unpurified flue gas can be continuously increased under the effect of the stepped narrowing of the inner cavity of the pressurized nozzle, and the flue gas is quickly blown outward through the strip air outlet of the pressurized nozzle, so that the flue gas forms a wind curtain inside the top shell of the desulfurization tower. Compared with injecting the flue gas into the top shell of the desulfurization tower and drifting upward, the pressurized nozzle blows the flue gas into a wind curtain at high pressure, which can increase the contact area between the desulfurization slurry and the flue gas, thereby improving the purification efficiency of the flue gas. The high-speed airflow increases the mass transfer rate of the gas phase, so that the sulfide in the flue gas is dissolved into the desulfurization slurry more quickly, accelerating the purification reaction, and avoiding the accumulation and corrosion of particulate matter in the flue gas inside the U-shaped tube, extending the service life of the equipment, and reducing the maintenance cost of the equipment. The flue gas has high kinetic energy inside the U-shaped tube through high-speed blowing, further avoiding the blockage of the air outlet by particulate matter in the flue gas, and maintaining the stability and continuous operation capability of the equipment;

[0020] 3. The electric gear rod drives the first spray rack and the second spray rack to rotate in the opposite direction, so that the first spray rack and the second spray rack can rotate in a circle together with the first spray rack and the second spray rack during spraying, which can ensure that the desulfurization slurry evenly covers the entire flue gas flow, making the contact with the sulfide more sufficient. The sprayed desulfurization slurry can be in contact with the flue gas for a long time during the rotation process, which increases the contact time between the sulfide and the desulfurization slurry and improves the purification efficiency. Compared with the existing fixed spraying method, the rotary spraying can reduce the dead angle or blind spot in the equipment, ensuring that all parts of the flue gas can be effectively purified, and effectively reduce the scaling problem on the inner wall of the pipeline, keep the inside of the pipeline clean, reduce the risk of nozzle or pipeline blockage, and keep the equipment unobstructed and stable operation;

[0021] 4. When the second spray rack rotates, the L-shaped scraper is driven to rotate together, so that the L-shaped scraper can fit the inner wall of the desulfurization tower top shell during the rotation process and scrape the desulfurization slurry attached to the inner wall of the desulfurization tower top shell. The hollow slide is blocked by the triangular plate and slides up and down during the rotation process, and the second slide bar is limited in both directions by the quadrilateral hole and the hollow slide bar and the third spring is elastically tightened, so that the scraper fixedly connected to the second slide bar is scraped on the outer wall of the quadrilateral hole in a parallelogram moving trajectory. After the scraper finishes scraping the surface of the L-shaped scraper downward, the scraper will detach from the surface of the L-shaped scraper, so that the surface of the L-shaped scraper will not be blocked due to particulate matter in the flue gas attached to the surface during use, ensuring desulfurization. When the sulfur slurry flows downward along the outer wall of the L-shaped scraper, the outer wall of the L-shaped scraper is smooth. After the scraper scrapes the desulfurization slurry and flue gas particles on the surface of the L-shaped scraper, due to the small contact area of ​​the scraper when scraping the L-shaped scraper, the desulfurization slurry and the particles in the flue gas will no longer adhere to the scraper surface due to their own gravity and fall downward, so that the L-shaped scraper and the scraper can maintain a smooth surface during the scraping process, avoiding the problem that the L-shaped scraper is blocked due to residue attached to the inner wall of the L-shaped scraper after scraping the inner wall of the desulfurization tower top shell, and the L-shaped scraper is difficult to effectively scrape off the desulfurization slurry attached to the inner wall of the desulfurization tower top shell, ensuring that the equipment has sufficient slurry when reusing the desulfurization slurry, and improving the utilization efficiency of the desulfurization slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the overall structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0025] Figure 4 It is an exploded schematic diagram of the circulation component structure of the present invention;

[0026] Figure 5 It is a partial schematic diagram of the uniform spray assembly structure of the present invention;

[0027] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 7 It is a partial schematic diagram of the structure of the desulfurization slurry collecting assembly of the present invention;

[0029] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at C in the middle;

[0030] Fig. 9 It is a partial schematic diagram of the scraper structure of the present invention.

[0031] In the figure:

[0032] 11. Desulfurization tower top shell; 12. Exhaust pipe; 13. Intake pipe;

[0033] 2. circulation assembly; 21. bracket; 22. motor shaft; 23. fan blade; 24. first circular plate; 25. first spring; 26. first transmission plate; 27. limit slot plate; 28. baffle plate; 29. ​​first slide bar; 210. limit plate; 211. L-shaped support rod; 212. second circular plate; 213. second transmission plate; 214. U-shaped tube; 215. pressurizing nozzle; 216. second spring;

[0034] 3. Uniform spray assembly; 31. Electric gear rod; 32. First spray rack; 33. Second spray rack; 34. Liquid injection pipe; 35. Liquid storage box; 36. Sealing shaft;

[0035] 4. Desulfurization slurry collecting assembly; 41. L-shaped scraper; 42. Vertical groove; 43. Quadrilateral hole; 44. Hollow slide plate; 45. Second slide bar; 46. Positioning plate; 47. Third spring; 48. Scraper; 49. Limit rod; 410. Quadrilateral plate; 411. Connecting rod; 412. Triangular plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiments of the present invention

[0038] See also Figures 1 to 9An auxiliary desulfurization tower top based on tail-end flue gas emission includes a desulfurization tower top shell 11, an exhaust pipe 12 and an air intake pipe 13. The exhaust pipe 12 is fixedly connected to the upper surface of the desulfurization tower top shell 11, and the air intake pipe 13 is fixedly connected to the bottom of the outer wall of the desulfurization tower top shell 11. A circulation component 2 for circulating flue gas is arranged inside the desulfurization tower top shell 11, a uniform spray component 3 for uniform spray desulfurization is arranged inside the desulfurization tower top shell 11, and a desulfurization slurry collection component 4 for cleaning residual sulfide on the inner wall of the desulfurization tower top shell 11 is arranged inside the desulfurization tower top shell 11.

[0039] The circulation component 2 includes a bracket 21 which is fixedly connected to the inner wall of the desulfurization tower top shell 11 and is located above the air inlet pipe 13. A motor shaft 22 is installed on the side of the upper surface of the bracket 21 away from the inner wall of the desulfurization tower top shell 11. The outer wall of the motor shaft 22 is fixedly connected with fan blades 23 distributed in a circular array. The upper surface of the motor shaft 22 is fixedly connected with a first circular plate 24. The interior of the first circular plate 24 is fixedly connected with a first spring 25 symmetrically about the axis of the fan blade 23. The first spring 25 is fixedly connected with a first transmission plate 26 at one end close to the outer wall of the first circular plate 24. The first transmission plate 26 is slidably connected to the upper surface of the first circular plate 24.

[0040] The circulation component 2 also includes a limit slot plate 27 fixedly connected to the inner wall of the desulfurization tower top shell 11 and located above the motor shaft 22. The upper surface of the limit slot plate 27 is provided with a hexagonal slot, and a first slide bar 29 is evenly slidably connected inside the hexagonal slot. The outer wall of the first slide bar 29 is fixedly connected to a baffle 28, and the outer side walls of the baffle 28 are all fitted together. The inner wall of the desulfurization tower top shell 11 and the baffle 28 are rotatably connected to the limit plate 210. The first The upper ends of the slide bars 29 are slidably connected to the inside of the limit plate 210, the inner side of the limit plate 210 is fixedly connected with an L-shaped support rod 211, the lower surface of the L-shaped support rod 211 is fixedly connected with a second circular plate 212, the lower surface of the second circular plate 212 is fixedly connected with a second transmission plate 213 in an annular array, and the outer wall of the desulfurization tower top shell 11 is symmetrically fixedly connected with a U-shaped tube 214, the upper ends of the U-shaped tube 214 are all located above the fan blades 23, and the U-shaped tube 214 is fixedly connected to the fan blades 23. The lower ends are all located below the fan blades 23, and the lower end of the U-shaped tube 214 is fixedly connected to a pressurizing nozzle 215. A second spring 216 is fixedly connected between the upper surface of the limit plate 210 and the inner wall of the exhaust pipe 12. The side close to the first transmission plate 26 and the second transmission plate 213 is set as an inclined surface. The diameter of the second circular plate 212 is equal to the diameter of the first circular plate 24. The interior of the limit plate 210 is distributed in a circular array and has six slide grooves inclined from the outer circle to the inner circle. The first slide rods 29 are slidably connected to the inside of the slide groove of the limit plate 210. The inner cavity of the pressurizing nozzle 215 is stepped from the side close to the inner wall of the desulfurization tower top shell 11 to the inside of the desulfurization tower top shell 11. The side of the pressurizing nozzle 215 away from the inner wall of the desulfurization tower top shell 11 is provided with a strip air outlet. A monitoring controller is provided on the lower surface of the limit slot plate 27. The speed of the motor shaft 22 has two gears, high and low, and the monitoring controller electrically controls the motor shaft 22.

[0041] The uniform spray assembly 3 includes an electric gear rod 31 installed on the inner wall of the desulfurization tower top shell 11, a first spray rack 32 is rotatably connected to the inner wall of the desulfurization tower top shell 11 and located above the electric gear rod 31, and a second spray rack 33 is rotatably connected to the inner wall of the desulfurization tower top shell 11 and located below the electric gear rod 31. The first spray rack 32 and the second spray rack 33 are fixedly connected to the side close to each other. The gear rings of the first spray rack 32 and the second spray rack 33 are meshed with the electric gear rod 31. The outer wall of the desulfurization tower top shell 11 is fixedly connected to an injection pipe 34, and the injection pipe 34 is located inside the desulfurization tower top shell 11. One end of the liquid storage box 35 is fixedly connected, and the upper and lower surfaces of the liquid storage box 35 are rotatably connected to the sealing shaft 36. The liquid storage box 35 and the sealing shaft 36 are internally communicated with each other, and the sealing shaft 36 is communicated with the first spray frame 32 and the second spray frame 33. Spray nozzles are evenly arranged on the side away from the first spray frame 32 and the second spray frame 33. Pipes are arranged inside the first spray frame 32 and the second spray frame 33 and are connected to the spray nozzles. An injection box is inserted at one end of the injection pipe 34 away from the interior of the desulfurization tower top shell 11, and a pump is arranged inside the injection box, and desulfurization slurry is stored inside the injection box.

[0042] The desulfurization slurry collection assembly 4 includes an L-shaped scraper 41 symmetrically fixedly connected to the lower surface of the second spray frame 33. A vertical groove 42 is provided on the side of the L-shaped scraper 41 away from the inner wall of the desulfurization tower top shell 11. A hollow slide plate 44 is slidably connected inside the vertical groove 42. A quadrilateral hole 43 is penetrated on one side of the L-shaped scraper 41. A quadrilateral plate 410 is arranged inside the quadrilateral hole 43. A limit rod 49 is vertically slidably connected inside the quadrilateral plate 410. The upper and lower ends of the limit rod 49 are arranged as inclined surfaces. The upper and lower sides of the inner wall of the L-shaped scraper 41 are provided with inclined grooves matched with the limit rod 49. The inner edge of the quadrilateral hole 43 and the outer edge of the quadrilateral plate 410 are coated with magnetic coatings with opposite magnetic poles.

[0043] The desulfurization slurry collecting assembly 4 also includes a second sliding rod 45 slidably connected between the L-shaped scraper 41 and the quadrilateral plate 410. The end of the second sliding rod 45 close to the inner wall of the desulfurization tower top shell 11 is fixedly connected with a scraper 48. The scraper 48 is attached to the side of the L-shaped scraper 41 close to the inner wall of the desulfurization tower top shell 11. The end of the second sliding rod 45 away from the inner wall of the desulfurization tower top shell 11 is slidably connected to the inside of the hollow slide plate 44. The outer wall of the quadrilateral plate 410 is rotatably connected with a positioning plate 46. A third spring 47 is fixedly connected between the second sliding rod 45 and the positioning plate 46. The bottom of the inner cavity of the desulfurization tower top shell 11 is symmetrically fixedly connected with connecting rods 411. The upper end of the connecting rod 411 is fixedly connected with a triangular plate 412. The cross-section of the L-shaped scraper 41 is L-shaped. The outer wall of the L-shaped scraper 41 is attached to the inner wall of the desulfurization tower top shell 11. The height of the triangular plate 412 is equal to the quadrilateral hole 43.

[0044] The above implementation works as follows:

[0045] The initialization steps are as follows: the staff connects the injection box to one end of the injection pipe 34 located on the outside of the desulfurization tower top shell 11 and starts the pump inside it. The desulfurization slurry inside the injection box is pressurized from the injection box through the injection pipe 34 and injected into the liquid storage box 35. The desulfurization slurry is sprayed out from the spray nozzle inside the liquid storage box 35 through the sealing shaft 36 and the pipe inside the first spray frame 32.

[0046] The working steps are as follows:

[0047] The flue gas is fully contacted with the desulfurization slurry through the uniform spraying component 3:

[0048] like Figures 1 to 5 As shown, the staff starts the desulfurization tower top shell 11, and then blows the flue gas into the desulfurization tower top shell 11 through the air inlet pipe 13. After the electric gear rod 31 is started, it engages with the gear rings of the first spray rack 32 and the second spray rack 33 to drive the first spray rack 32 and the second spray rack 33 to rotate in the opposite direction, so that the desulfurization slurry sprayed by the first spray rack 32 and the second spray rack 33 is evenly covered in the desulfurization tower top shell 11. After the motor shaft 22 is started, it drives the fan blades 23 to open The fan blades 23 rotate at a low speed at the beginning, and after the rotation, the gas below the fan blades 23 is blown to the top of the fan blades 23, so that the flue gas introduced into the top shell 11 of the desulfurization tower through the air inlet pipe 13 is blown upward. In the process of blowing upward, the flue gas will pass through the atomized layer of desulfurization slurry formed by the spraying of the first spray rack 32 and the second spray rack 33, so that the sulfide in the flue gas is adsorbed and purified by the desulfurization slurry, and the desulfurized flue gas is discharged from the exhaust pipe 12 to the outside of the equipment through the upward blowing of the fan blades 23.

[0049] Repeated purification of flue gas by circulation component 2:

[0050] like Figures 2 to 6As shown, when the monitoring controller on the lower surface of the limit slot plate 27 detects that a high concentration of sulfide still remains in the flue gas blown upward after purification, the monitoring controller will control the motor shaft 22 to rotate at a high speed. After the speed of the motor shaft 22 is increased, the fan blades 23 will rotate at a high speed together, thereby increasing the wind speed of the fan blades 23 blowing the flue gas upward. As the speed of the motor shaft 22 increases, the speed of the first circular plate 24 increases together with the motor shaft 22. The first transmission plate 26 is affected by the increased centrifugal force caused by the increased speed of the first circular plate 24, and a large force is generated to slide away from the middle of the first circular plate 24. The first spring 25 is elastically stretched by the sliding of the first transmission plate 26. After the first transmission plate 26 slides away from the center of the first circular plate 24, it will conflict with the second transmission plate 213. As the first transmission plate 26 rotates inside the first circular plate 24, the second transmission plate 213 will be pushed by the first transmission plate 26 to rotate together. After the rotation, the second circular plate 212 and the L-shaped support rod 211 drive the limiting plate 210 to rotate together. After the limiting plate 210 rotates, the second spring 216 is elastically stretched. When the limiting plate 210 rotates, the six first slide bars 29 slide inside the hexagonal groove on the upper surface of the limiting groove plate 27. The sliding of the first slide bar 29 drives the baffle plate 28 to move together. When the six baffle plates 28 move, the side edges fit and slide against each other. As the baffle plates 28 fit and slide against each other, the gaps formed between the six baffle plates 28 are continuously reduced and closed. After the six baffle plates 28 are closed, the limiting plate 210 can no longer push the first slide bar 29. After the limiting plate 210 cannot move, the second transmission plate 213 can also not continue to rotate. When the first transmission plate 26 rotates, it is blocked by the second transmission plate 213. The oblique sides of the first transmission plate 26 and the second transmission plate 213 squeeze each other, so that the first transmission plate 26 is squeezed by the second transmission plate 213 and slides toward the center of the first circular plate 24.

[0051] After the six baffles 28 seal the interior of the desulfurization tower top shell 11, the flue gas inside the desulfurization tower top shell 11 cannot be blown out to the exhaust pipe 12 through the baffles 28. The space between the fan blades 23 and the baffles 28 is affected by the high-speed blowing of the fan blades 23 to form a high-pressure interval. The flue gas inside the high-pressure interval is blown through the upper end of the U-shaped tube 214 to the end of the U-shaped tube 214 below the fan blades 23, so that the flue gas that is not completely desulfurized forms a cycle above and below the fan blades 23 through the U-shaped tube 214. When the flue gas is blown into the desulfurization tower top shell 11 through the lower end of the U-shaped tube 214, the flue gas in the high-pressure interval is blown to the end of the U-shaped tube 214 below the fan blades 23. When the flue gas is in the desulfurization tower, a pressure nozzle 215 is provided on one side of the lower end of the U-shaped tube 214 located inside the desulfurization tower top shell 11, and the inner cavity of the pressure nozzle 215 is stepped-narrowed. The flue gas has an increased flow rate due to the narrowing of the inner cavity of the pressure nozzle 215, and is blown into the interior of the desulfurization tower top shell 11 through the strip-shaped air outlet of the pressure nozzle 215. Under the guidance and acceleration of the pressure nozzle 215, the flue gas will be spread in the form of a wind curtain above the first spray rack 32, so that the desulfurization slurry sprayed from the first spray rack 32 can contact the flue gas more fully, thereby making the flue gas purified more efficiently.

[0052] The desulfurization slurry on the inner wall of the desulfurization tower top shell 11 is cleaned and recovered through the desulfurization slurry collecting component 4:

[0053] like Figure 2 and Figures 7 to 9As shown, when the second spray rack 33 is rotating and spraying, the L-shaped scraper 41 fixedly connected to the lower surface of the second spray rack 33 will rotate together with the second spray rack 33. During the rotation of the L-shaped scraper 41, the L-shaped scraper 41 will scrape the slurry remaining on the inner wall of the desulfurization tower top shell 11 through its side that is in contact with the inner wall of the desulfurization tower top shell 11, so that the desulfurization slurry is transferred from the inner wall of the desulfurization tower top shell 11 to the outer wall of the L-shaped scraper 41. After the desulfurization slurry converges on the outer wall of the L-shaped scraper 41, it flows downward along the outer wall of the L-shaped scraper 41 and finally flows into the bottom of the desulfurization tower top shell 11. In the process of the L-shaped scraper 41 scraping the inner wall of the desulfurization tower top shell 11, the solid in the flue gas will The flue gas particles are gathered on the surface of the L-shaped scraper 41, making it difficult for the desulfurization slurry to flow down. As the L-shaped scraper 41 rotates, the hollow slide plate 44 is driven to rotate together. When the hollow slide plate 44 rotates to the lower triangular plate 412, the hollow slide plate 44 is blocked by the inclined surface of the triangular plate 412 and slides to the bottom of the L-shaped scraper 41. The hollow slide plate 44 slides downward and drives the second slide bar 45 to slide downward inside the quadrilateral hole 43. The third spring 47 is elastically stretched by the sliding of the second slide bar 45. When the second slide bar 45 slides downward, the scraper 48 is attached to the outer wall of the L-shaped scraper 41 and slides downward. The downward sliding of the scraper 48 wipes out the flue gas particles accumulated on the L-shaped scraper 41, so that the flue gas particles accumulated on the L-shaped scraper 41 are removed. The lower half of the outer wall of the L-shaped scraper 41 is scraped flat. Since the horizontal height of the triangular plate 412 is equal to the quadrilateral hole 43, when the hollow slide plate 44 slides to the bottom end of the triangular plate 412, the second slide bar 45 will slide in contact with the bottom of the quadrilateral hole 43. When the second slide bar 45 slides, it will push the inclined surface of the bottom end of the limiting rod 49, so that the limiting rod 49 slides upward inside the quadrilateral plate 410, so that the upper end of the limiting rod 49 is inserted into the inside of the L-shaped scraper 41, and then the second slide bar 45 is affected by the rebound effect of the third spring 47, and will slide upward inside the quadrilateral hole 43. When the hollow slide plate 44 rotates to the higher triangular plate 412, the second slide bar 4 5 will slide upward in the state of being out of contact with the surface of the L-shaped scraper 41. When the second slide bar 45 slides to the top of the quadrilateral hole 43, it will be rebounded by the third spring 47 and re-contacted to the outer wall of the L-shaped scraper 41, and slide from the upper end of the quadrilateral hole 43 to the middle of the quadrilateral hole 43. During this sliding process, the scraper 48 is in contact with the outer wall of the L-shaped scraper 41 to flatten the upper half of the L-shaped scraper 41. The scraper 48 scrapes the outer wall of the L-shaped scraper 41, so that the flue gas particles accumulated on the surface of the L-shaped scraper 41 are cleaned in time, so that the outer wall of the L-shaped scraper 41 is flat and smooth, and the desulfurization slurry can flow along the outer wall of the L-shaped scraper 41 to the bottom of the desulfurization tower top shell 11 in time.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0055] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary desulfurization tower top based on tail-end flue gas emission, comprising a desulfurization tower top shell (11), an exhaust pipe (12) and an intake pipe (13), characterized in that: The exhaust pipe (12) is fixedly connected to the upper surface of the desulfurization tower top shell (11), the air inlet pipe (13) is fixedly connected to the bottom of the outer wall of the desulfurization tower top shell (11), a circulation component (2) for circulating flue gas is arranged inside the desulfurization tower top shell (11), a uniform spray component (3) for uniform spray desulfurization is arranged inside the desulfurization tower top shell (11), and a desulfurization slurry collection component (4) for cleaning residual sulfide on the inner wall of the desulfurization tower top shell (11) is arranged inside the desulfurization tower top shell (11); The circulation component (2) comprises a bracket (21) fixedly connected to the inner wall of the desulfurization tower top shell (11) and located above the air inlet pipe (13); a motor shaft (22) is installed on the side of the upper surface of the bracket (21) away from the inner wall of the desulfurization tower top shell (11); the outer wall of the motor shaft (22) is fixedly connected to the fan blades (23) in a circular array; the upper surface of the motor shaft (22) is fixedly connected to a first circular plate (24); the interior of the first circular plate (24) is fixedly connected to a first spring (25) symmetrically about the axis of the fan blade (23); the first spring (25) is fixedly connected to one end of the first spring (25) close to the outer wall of the first circular plate (24); and the first transmission plate (26) is slidably connected to the upper surface of the first circular plate (24); The circulation component (2) further comprises a limit slot plate (27) fixedly connected to the inner wall of the desulfurization tower top shell (11) and located above the motor shaft (22); the upper surface of the limit slot plate (27) is provided with a hexagonal slot, a first slide bar (29) is evenly slidably connected inside the hexagonal slot, the outer wall of the first slide bar (29) is fixedly connected to a baffle (28), the outer side walls of the baffle (28) are in contact with each other, the inner wall of the desulfurization tower top shell (11) and located above the baffle (28) are rotatably connected to a limit plate (210), the upper end of the first slide bar (29) is slidably connected to the inside of the limit plate (210), and the inner side of the limit plate (210) is fixedly connected to the inner wall of the desulfurization tower top shell (11). An L-shaped support rod (211) is connected, the lower surface of the L-shaped support rod (211) is fixedly connected to a second circular plate (212), the lower surface of the second circular plate (212) is fixedly connected to a second transmission plate (213) distributed in a circular array, the outer wall of the desulfurization tower top shell (11) is symmetrically fixedly connected to a U-shaped tube (214), the upper ends of the U-shaped tubes (214) are all located above the fan blades (23), the lower ends of the U-shaped tubes (214) are all located below the fan blades (23), the lower ends of the U-shaped tubes (214) are fixedly connected to a pressurizing nozzle (215), and a second spring (216) is fixedly connected between the upper surface of the limit plate (210) and the inner wall of the exhaust pipe (12); The uniform spray assembly (3) comprises an electric gear rod (31) mounted on the inner wall of a desulfurization tower top shell (11); a first spray frame (32) is rotatably connected to the inner wall of the desulfurization tower top shell (11) and located above the electric gear rod (31); a second spray frame (33) is rotatably connected to the inner wall of the desulfurization tower top shell (11) and located below the electric gear rod (31); a gear ring is fixedly connected to the first spray frame (32) and the second spray frame (33) on the side close to each other; the first spray frame (32) and the second spray frame (33) are 3) are meshed with the electric gear rod (31), the outer wall of the desulfurization tower top shell (11) is fixedly connected with a liquid injection pipe (34), one end of the liquid injection pipe (34) located inside the desulfurization tower top shell (11) is fixedly connected with a liquid storage box (35), the upper surface and the lower surface of the liquid storage box (35) are rotatably connected with a sealing shaft (36), the liquid storage box (35) and the inside of the sealing shaft (36) are mutually connected, and the sealing shaft (36) is connected with the inside of the first spray frame (32) and the second spray frame (33); The desulfurization slurry collection assembly (4) comprises an L-shaped scraper (41) symmetrically fixedly connected to the lower surface of the second spray frame (33), a vertical groove (42) is provided on one side of the L-shaped scraper (41) away from the inner wall of the desulfurization tower top shell (11), a hollow slide plate (44) is slidably connected inside the vertical groove (42), a quadrilateral hole (43) is penetrated through one side of the L-shaped scraper (41), a quadrilateral plate (410) is arranged inside the quadrilateral hole (43), a limit rod (49) is vertically slidably connected inside the quadrilateral plate (410), the upper and lower ends of the limit rod (49) are arranged as inclined surfaces, the upper and lower sides of the inner wall of the L-shaped scraper (41) are provided with inclined grooves matching the limit rod (49), and the inner edge of the quadrilateral hole (43) and the outer edge of the quadrilateral plate (410) are coated with magnetic coatings with opposite magnetic poles; The desulfurization slurry collection assembly (4) also includes a second slide bar (45) slidably connected between the L-shaped scraper bar (41) and the quadrilateral plate (410); one end of the second slide bar (45) close to the inner wall of the desulfurization tower top shell (11) is fixedly connected to a scraper plate (48); the scraper plates (48) are attached to the side of the L-shaped scraper bar (41) close to the inner wall of the desulfurization tower top shell (11); one end of the second slide bar (45) away from the inner wall of the desulfurization tower top shell (11) is slidably connected to the inside of the hollow slide plate (44); the outer wall of the quadrilateral plate (410) is rotatably connected to a positioning plate (46); a third spring (47) is fixedly connected between the second slide bar (45) and the positioning plate (46); the bottom of the inner cavity of the desulfurization tower top shell (11) is symmetrically fixedly connected to connecting rods (411); the upper ends of the connecting rods (411) are fixedly connected to triangular plates (412).

2. The auxiliary desulfurization tower top based on tail-end flue gas emission according to claim 1, characterized in that: The sides of the first transmission plate (26) and the second transmission plate (213) that are close to each other are both set as inclined surfaces, the diameter of the second circular plate (212) is equal to the diameter of the first circular plate (24), the interior of the limit plate (210) is provided with six slide grooves inclined from the outer circle to the inner circle in a circular array, the first slide rods (29) are slidably connected to the inside of the slide grooves of the limit plate (210), the inner cavity of the pressurizing nozzle (215) is stepped from the side close to the inner wall of the desulfurization tower top shell (11) to the inside of the desulfurization tower top shell (11), and the side of the pressurizing nozzle (215) away from the inner wall of the desulfurization tower top shell (11) is provided with a strip air outlet.

3. The auxiliary desulfurization tower top based on tail-end flue gas emission according to claim 1 is characterized in that: Spray nozzles are evenly arranged on the side away from the first spray rack (32) and the second spray rack (33), and pipes are arranged inside the first spray rack (32) and the second spray rack (33) to communicate with the spray nozzles. An injection box is inserted into the end of the injection pipe (34) away from the inside of the desulfurization tower top shell (11), and a pump is arranged inside the injection box. Desulfurization slurry is stored inside the injection box.

4. The auxiliary desulfurization tower top based on tail-end flue gas emission according to claim 1, characterized in that: The L-shaped scraper (41) has an L-shaped cross section, the outer wall of the L-shaped scraper (41) is attached to the inner wall of the desulfurization tower top shell (11), and the height of the triangular plate (412) is equal to that of the quadrilateral hole (43).

5. The auxiliary desulfurization tower top based on tail-end flue gas emission according to claim 1, characterized in that: A monitoring controller is provided on the lower surface of the limit slot plate (27); the motor shaft (22) has two speed levels, high and low; and the monitoring controller electrically controls the motor shaft (22).

Images