Ultra-large type unit wet desulphurization absorption tower spraying system
The threaded connection and rotating spray design solved the nozzle wear problem, improved desulfurization efficiency and equipment maintenance convenience, and achieved a highly efficient desulfurization process.
Patent Information
- Application Number
- CN202422284838.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In existing technologies, nozzles are prone to wear during high-speed spraying, resulting in time-consuming and labor-intensive replacements, which affects desulfurization efficiency and maintenance costs.
The nozzle is connected by a threaded connection, and the combination of a rotating drum and an arc plate design creates a rotating spray, which increases the spray coverage area and uniformity. The hollow beam structure and rubber lining reduce weight and provide corrosion protection.
It improves desulfurization efficiency, reduces the difficulty and maintenance cost of nozzle replacement, enhances gas-liquid contact effect, and extends equipment service life.
Smart Images
Figure CN223505099U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wet desulfurization technology, specifically to a spray system for a wet desulfurization absorption tower in ultra-large generating units. Background Technology
[0002] With increasingly stringent environmental protection requirements, reducing sulfur dioxide emissions has become a crucial task for the power industry. To reduce atmospheric sulfur dioxide pollution, national and local governments have introduced a series of strict environmental regulations and emission standards, requiring coal-fired power plants and other enterprises to adopt effective desulfurization measures to reduce sulfur dioxide emissions. Wet desulfurization technology, as a widely used flue gas desulfurization method, requires a sufficient number of nozzles arranged on the spray layer pipeline to ensure that the slurry droplets are fully and evenly distributed across the entire cross-section of the absorption tower.
[0003] The nozzles are directly fixed on the main pipes and branch pipes. Since the slurry may contain certain solid particles, the nozzles will be worn during high-speed spraying. Replacing nozzles directly fixed on the main pipes and branch pipes is time-consuming and labor-intensive. Therefore, this application provides a spraying system for wet desulfurization absorption towers of ultra-large units. Utility Model Content
[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:
[0005] A spray system for a wet desulfurization absorption tower in an ultra-large unit includes a base, an absorption tower fixedly installed on the top surface of the base, an air inlet pipe fixedly connected to the side of the absorption tower, a collection tank containing lime water located on the side of the absorption tower, and a spray mechanism located on the side of the collection tank. The spray mechanism includes a slurry circulation pump fixedly installed on the side of the base, the inlet of the slurry circulation pump being fixedly connected to the side of the collection tank, and the outlet being fixedly connected to a connecting pipe. Three main pipes are fixedly connected to the side of the connecting pipe, all three main pipes being located inside the absorption tower and each having multiple branch pipes fixedly connected to its side. Two of the main pipes and multiple branch pipes are threadedly connected to the bottom of a first nozzle, and the other main pipe and multiple branch pipes are threadedly connected to the bottom of a second nozzle. An air outlet pipe is fixedly connected to the top of the absorption tower. By setting up the spray mechanism, the lime water is sprayed in the form of a spray to fully contact the flue gas entering the absorption tower, increasing the gas-liquid contact area and facilitating the reaction between sulfur dioxide and lime water.
[0006] Furthermore, the second nozzle includes a spray pipe threadedly connected to the bottom of another main pipe and multiple branch pipes. A tripod is fixedly connected to the side wall of the spray pipe, and a rotating rod is rotatably connected to the top of the tripod. A rotating cylinder is fixedly connected to the end of the rotating rod away from the tripod. An arc-shaped plate is connected to the side wall of the rotating cylinder. The end of the rotating cylinder away from the rotating rod is rotatably connected to the end of the spray pipe. Through the design of the rotating cylinder and the arc-shaped plate, when the slurry is sprayed from the spray pipe, it pushes the rotating cylinder to rotate, thereby driving the arc-shaped plate to rotate, so that the sprayed slurry forms a rotating spray, increasing the coverage area and uniformity of the spray.
[0007] Furthermore, the absorption tower is provided with multiple inspection windows on its side, and a drain valve is fixedly connected to the side of the absorption tower away from the inspection windows. The inspection windows allow for observation and inspection of the operation inside the absorption tower, and the generated waste liquid can be discharged through the drain valve.
[0008] Furthermore, a support beam is fixedly installed inside the absorption tower. The support beam has a hollow beam structure and is lined with a rubber lining. The main pipe is fixed to the bottom of the support beam. The support beam has a hollow beam structure and is lined with a rubber lining, which reduces its own weight on the one hand, and the rubber lining plays a role in corrosion prevention on the other hand.
[0009] Furthermore, an alloy tray is fixedly installed on the top of the support beam, and multiple through holes are provided on the outer surface of the alloy tray, which can rectify the rising flue gas.
[0010] Furthermore, a support frame is fixedly installed on the inner top of the absorption tower, and a demister body is fixedly installed inside the support frame. The demister body can remove liquid droplets carried in the flue gas.
[0011] Furthermore, the top of the collection tank is provided with a tank cover, and a handle is fixedly installed on the top of the tank cover, which makes it convenient for staff to open and close the tank cover.
[0012] Furthermore, a temperature measuring instrument is fixedly installed on the side of the collection tank away from the slurry circulation pump, allowing staff to monitor the slurry temperature in real time.
[0013] The beneficial effects of this utility model are as follows:
[0014] This invention, by setting up a spraying mechanism, allows lime water to come into full contact with the flue gas entering the absorption tower in the form of a spray, increasing the gas-liquid contact area and facilitating the reaction between sulfur dioxide and lime water, thereby improving desulfurization efficiency. The main pipe and branch pipe are connected to the first nozzle and the second nozzle by a threaded connection at the bottom. When the first nozzle and the second nozzle are worn and need to be replaced, this threaded connection method makes disassembly and installation more convenient and quick, saving maintenance time and labor costs.
[0015] This invention utilizes the design of a rotating drum and an arc-shaped plate. When the slurry is sprayed from the spray pipe, it drives the rotating drum to rotate, thereby causing the arc-shaped plate to rotate. This creates a rotating spray of slurry, increasing the coverage area and uniformity of the spray, improving the gas-liquid contact effect, and helping to enhance desulfurization efficiency. The rotating spray can also reduce the accumulation of slurry at the nozzle outlet, reducing the possibility of nozzle clogging.
[0016] This invention effectively reduces its own weight by setting the support beam as a hollow beam structure, thereby reducing the load on the absorption tower structure. The surface is lined with a rubber inner lining, which provides good corrosion protection and wear resistance, extending the service life of the support beam. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;
[0018] Figure 2 This is a partial three-dimensional structural schematic diagram of this utility model;
[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the support beam and alloy tray of this utility model;
[0020] Figure 4 This is a three-dimensional structural diagram of the spraying mechanism of this utility model;
[0021] Figure 5 This is a three-dimensional structural diagram of the second nozzle of this utility model;
[0022] Reference numerals: 1. Base; 2. Absorption tower; 3. Air inlet pipe; 4. Liquid collection tank; 5. Spraying mechanism; 501. Slurry circulation pump; 502. Connecting pipe; 503. Main pipe; 504. Branch pipe; 505. First nozzle; 506. Second nozzle; 6. Air outlet pipe; 7. Liquid spraying pipe; 8. Tripod; 9. Rotating rod; 10. Rotating cylinder; 11. Arc plate; 12. Inspection window; 13. Drain valve; 14. Support beam; 15. Alloy tray; 16. Through hole; 17. Support frame; 18. Demister body; 19. Cover; 20. Handle; 21. Temperature measuring gauge. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0024] This application provides a spray system for a wet desulfurization absorption tower in ultra-large power units, mainly to solve the problems of nozzle wear during high-speed spraying and the time-consuming and labor-intensive process of replacing nozzles directly fixed on the main and branch pipelines. The following technical solution is provided and will be described in detail: Example
[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in some embodiments, the absorption tower 2 is fixedly installed on the top surface of the base 1. An air inlet pipe 3 is fixedly connected to the side of the absorption tower 2. A collection tank 4 containing lime water is provided on the side of the absorption tower 2. A spraying mechanism 5 is provided on the side of the collection tank 4. The spraying mechanism 5 includes a slurry circulation pump 501 fixed to the side of the base 1. The inlet of the slurry circulation pump 501 is fixedly connected to the side of the collection tank 4, and the outlet is fixedly connected to a connecting pipe 502. Three main pipes 503 are fixedly connected to the side of the connecting pipe 502. All three main pipes 503 are located inside the absorption tower 2, and each has multiple branch pipes 504 fixedly connected to its side. Two of the main pipes 503... A first nozzle 505 is threadedly connected to the bottom of multiple branch pipes 504. A second nozzle 506 is threadedly connected to the bottom of another main pipe 503 and multiple branch pipes 504. An outlet pipe 6 is fixedly connected to the top of the absorption tower 2. The second nozzle 506 includes a liquid spray pipe 7 threadedly connected to the bottom of another main pipe 503 and multiple branch pipes 504. A tripod 8 is fixedly connected to the side wall of the liquid spray pipe 7. A rotating rod 9 is rotatably connected to the top of the tripod 8. A rotating cylinder 10 is fixedly connected to the end of the rotating rod 9 away from the tripod 8. An arc plate 11 is connected to the side wall of the rotating cylinder 10. The end of the rotating cylinder 10 away from the rotating rod 9 is rotatably connected to the end of the liquid spray pipe 7.
[0026] Specifically: By setting up a spraying mechanism 5, lime water is sprayed into the flue gas entering the absorption tower 2 to fully contact, increasing the gas-liquid contact area, which is beneficial to the reaction of sulfur dioxide and lime water, thereby improving the desulfurization efficiency. The bottom of the main pipe 503 and the branch pipe 504 are connected by a threaded connection to the first nozzle 505 and the second nozzle 506. When the first nozzle 505 and the second nozzle 506 are worn and need to be replaced, this threaded connection method makes disassembly and installation more convenient and quick, saving maintenance time and labor costs.
[0027] The working principle here is as follows: Flue gas containing sulfur dioxide enters the absorption tower 2 through the inlet pipe 3. At the same time, the slurry circulation pump 501 starts, drawing out lime water (desulfurization slurry) from the collection tank 4. The lime water enters through the inlet of the slurry circulation pump 501 and flows out through the outlet into the connecting pipe 502. The lime water in the connecting pipe 502 enters three main pipes 503 and then flows into various branch pipes 504. At the first nozzle 505, where two main pipes 503 and multiple branch pipes 504 are threadedly connected at the bottom, the lime water is sprayed out at a certain pressure and angle, forming a spray that makes initial contact and reaction with the flue gas to remove some of the sulfur dioxide. At the second nozzle 506, where another main pipe 503 and multiple branch pipes 504 are threadedly connected at the bottom, the working principle is slightly different. When the lime water flows out from the spray pipe 7... When sprayed, the impact force of the water flow acts on the arc plate 11 of the rotating drum 10, pushing the rotating drum 10 to rotate. The rotating drum 10 is rotatably connected to the inner top of the tripod 8 through the rotating rod 9. At the same time, the end of the rotating drum 10 away from the rotating rod 9 is rotatably connected to the end of the spray pipe 7, so that the rotating drum 10 can rotate stably at the end of the spray pipe 7. As the rotating drum 10 rotates, the arc plate 11 connected to its side wall also rotates, so that the lime water sprayed from the nozzle forms a rotating spray. This rotating spray can increase the coverage area of the spray, so that the lime water and flue gas can come into more full contact, improving the desulfurization efficiency. After the flue gas and lime water spray come into full contact in the absorption tower 2, sulfur dioxide and the effective components in the lime water undergo a chemical reaction and are absorbed and transformed. The flue gas after desulfurization treatment is discharged from the gas outlet pipe 6 at the top of the absorption tower 2.
[0028] like Figure 1 , Figure 2 , Figure 3As shown, in some embodiments, the absorption tower 2 has multiple inspection windows 12 on its side. A drain valve 13 is fixedly connected to the side of the absorption tower 2 away from the inspection windows 12. A support beam 14 is fixedly installed inside the absorption tower 2. The support beam 14 has a hollow beam structure and is lined with a rubber inner lining. The main pipe 503 is fixed to the bottom of the support beam 14. An alloy tray 15 is fixedly installed on the top of the support beam 14. Multiple through holes 16 are provided on the outer surface of the alloy tray 15. A support frame 17 is fixedly installed on the inner top of the absorption tower 2. A demister body 18 is fixedly installed inside the support frame 17. The working principle here is as follows: after the flue gas containing sulfur dioxide enters the absorption tower 2 through the inlet pipe 3, the lime water slurry sprayed by the spraying mechanism 5 reacts with the flue gas to achieve the desulfurization process. During the operation of the absorption tower 2, the operator can observe the operation inside the absorption tower 2 through the multiple inspection windows 12 set on the side of the absorption tower 2. Inspection and monitoring are conducted to promptly identify and address any issues. After the reaction within the absorption tower 2 is complete, the generated waste liquid can be discharged through the drain valve 13. The support beam 14 adopts a hollow beam structure with a rubber lining, which reduces its weight and provides corrosion protection. The support beam 14 is used to fix the main pipe 503, ensuring the stable operation of the spray system. The alloy tray 15, fixedly installed on the top of the support beam 14, has multiple through holes 16 on its outer surface that can rectify the rising flue gas, making it pass through the absorption tower 2 more evenly and improving the gas-liquid contact effect. The flue gas, after desulfurization treatment, continues to rise and reaches the demister body 18 at the top of the absorption tower 2. The demister body 18 can remove liquid droplets carried in the flue gas, reducing the moisture content and preventing corrosion of downstream equipment and environmental pollution. The support frame 17 is used to fix the demister body 18, ensuring its stable operation. It should be noted that the demister body 18 is existing technology, and its working principle will not be elaborated here. Example
[0029] The solution in Example 1 will be further described below with reference to its specific working method.
[0030] like Figure 1 , Figure 4As shown, in some embodiments, a cover 19 is provided on the top of the collection tank 4, and a handle 20 is fixedly installed on the top of the cover 19. A temperature measuring meter 21 is fixedly installed on the side of the collection tank 4 away from the slurry circulation pump 501. The working principle here is as follows: the collection tank 4 is used to store desulfurization slurry such as lime water. The cover 19 on the top of the collection tank 4 can prevent foreign matter from entering the tank and keep the slurry clean. The handle 20 on the top of the cover 19 makes it convenient for the staff to open and close the cover 19 to perform operations such as adding, checking or maintaining the slurry. The temperature measuring meter 21 fixedly installed on the side of the collection tank 4 away from the slurry circulation pump 501 is used to measure the temperature of the slurry in the collection tank 4. Through the temperature measuring meter 21, the staff can understand the temperature of the slurry in real time, which is of great significance for the effect of the desulfurization reaction and the stable operation of the system, because the temperature of the slurry will affect the rate of chemical reaction and the desulfurization efficiency. Within a certain range, an appropriate temperature can improve the degree of desulfurization reaction.
[0031] Working Step 1: Flue gas containing sulfur dioxide enters the absorption tower 2 through the inlet pipe 3. The collection tank 4 contains desulfurization slurry such as lime water. The slurry circulation pump 501 extracts the slurry from the collection tank 4 and transports it through the connecting pipe 502 to three main pipes 503, and then distributes it to multiple branch pipes 504. The first nozzle 505 at the bottom of two of the main pipes 503 and branch pipes 504 sprays the slurry at a certain pressure and angle, forming a spray that initially contacts and reacts with the flue gas, removing some of the sulfur dioxide. In the second nozzle 506 at the bottom of the other main pipe 503 and branch pipe 504, the slurry is extracted from the collection tank 4 by the action of the slurry circulation pump 501, enters the main pipe 503 through the connecting pipe 502, is then distributed to the branch pipes 504, and finally reaches the spray pipe 7. The slurry then flows out from the spray pipe... 7. When sprayed, the slurry impacts the arc-shaped plate 11 of the rotating drum 10, causing the drum 10 to rotate and the arc-shaped plate 11 to rotate, thus forming a rotating spray of slurry, increasing the spray coverage area, allowing the slurry to contact the flue gas more fully, and improving desulfurization efficiency. During the rise of the flue gas in the absorption tower 2, it passes through the alloy tray 15, whose outer surface through holes 16 rectify the flue gas, making the flue gas pass through the absorption tower 2 more evenly, improving the gas-liquid contact effect, and promoting the desulfurization reaction. The bottom of the main pipe 503 and the branch pipe 504 are connected to the first nozzle 505 and the second nozzle 506 by a threaded connection. When the first nozzle 505 and the second nozzle 506 are worn and need to be replaced, this threaded connection method makes disassembly and installation more convenient and quick, saving maintenance time and labor costs. It should be noted that the support beam 14 adopts a hollow beam structure and is lined with a rubber lining, which reduces its own weight and provides corrosion protection. The support beam 14 is used to fix the main pipe 503 to ensure the stable operation of the sprinkler system. The branch pipe 504 is fixed to the support beam 14 by FRP pipe clamps, and the main pipe 503 is installed on the support beam 14 by pipe fittings. The first nozzle 505 and the second nozzle 506 are made of silicon carbide, which can effectively resist the wear and corrosion of the slurry.
[0032] Step Two: After desulfurization, the flue gas continues to rise, reaching the demister body 18 at the top of the absorption tower 2. The demister body 18 removes liquid droplets carried in the flue gas, reducing its moisture content. Operators can observe the internal operation through the inspection window 12 on the side of the absorption tower 2. Waste liquid inside the absorption tower 2 can be discharged through the drain valve 13. The waste liquid discharged through the drain valve 13 is treated to meet emission standards before being discharged. The cover 19 on the top of the collection tank 4 prevents debris from entering. The handle 20 on the cover 19 facilitates opening and closing for adding, inspecting, or maintaining the slurry. The temperature measuring gauge 21 on one side of the collection tank 4 monitors the slurry temperature in real time. Operators can adjust the slurry temperature according to actual conditions to ensure the effectiveness of the desulfurization reaction and the stable operation of the system. It should be noted that the demister body 18 is existing technology, and its working principle will not be elaborated here.
[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A spray system for a wet desulfurization absorption tower of an ultra-large unit, comprising a base (1), characterized in that, An absorption tower (2) is fixedly installed on the top surface of the base (1). An air inlet pipe (3) is fixedly connected to the side of the absorption tower (2). A liquid collection tank (4) containing lime water is provided on the side of the absorption tower (2). A spraying mechanism (5) is provided on the side of the liquid collection tank (4). The spraying mechanism (5) includes a slurry circulation pump (501) fixed to the side of the base (1). The inlet of the slurry circulation pump (501) is fixedly connected to the side of the liquid collection tank (4), and the outlet is fixedly connected to a connecting pipe (502). The side of the connecting pipe (502) is fixedly connected to three main pipes (503). All three main pipes (503) are located inside the absorption tower (2) and are fixedly connected to multiple branch pipes (504) on their sides. Two of the main pipes (503) and multiple branch pipes (504) are threadedly connected to the bottom of a first nozzle (505). The other main pipe (503) and multiple branch pipes (504) are threadedly connected to the bottom of a second nozzle (506). The top of the absorption tower (2) is fixedly connected to an outlet pipe (6).
2. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 1, characterized in that, The second nozzle (506) includes a spray pipe (7) threadedly connected to the bottom of another main pipe (503) and multiple branch pipes (504). A tripod (8) is fixedly connected to the side wall of the spray pipe (7). A rotating rod (9) is rotatably connected to the top of the tripod (8). A rotating cylinder (10) is fixedly connected to the end of the rotating rod (9) away from the tripod (8). An arc plate (11) is connected to the side wall of the rotating cylinder (10). The end of the rotating cylinder (10) away from the rotating rod (9) is rotatably connected to the end of the spray pipe (7).
3. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 1, characterized in that, The absorption tower (2) is provided with multiple inspection windows (12) on its side, and a drain valve (13) is fixedly connected to the side of the absorption tower (2) away from the inspection windows (12).
4. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 1, characterized in that, The absorption tower (2) is fixedly installed with a support beam (14). The support beam (14) adopts a hollow beam structure and is lined with a rubber inner lining. The main pipe (503) is fixed to the bottom of the support beam (14).
5. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 4, characterized in that, An alloy tray (15) is fixedly installed on the top of the support beam (14), and multiple through holes (16) are provided on the outer surface of the alloy tray (15).
6. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 1, characterized in that, The absorption tower (2) is fixedly installed with a support frame (17) at its inner top, and the demister body (18) is fixedly installed inside the support frame (17).
7. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 1, characterized in that, The liquid collection tank (4) is provided with a lid (19) on top, and a handle (20) is fixedly installed on the top of the lid (19).
8. The spray system for the wet desulfurization absorption tower of an ultra-large unit according to claim 1, characterized in that, A temperature measuring instrument (21) is fixedly installed on the side of the collection tank (4) away from the slurry circulation pump (501).