SNCR denitration multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure

Abstract

The utility model relates to flue gas denitration technical field especially SNCR denitration multistage gas liquid mixing injection tower and ammonia escape dynamic intercept structure, including tower body, the inner chamber of tower body is fixedly connected with first baffle, inclined plate and second baffle from top to bottom in proper order, and the bottom of second baffle is connected with hollow tube through the sealing bearing and penetrates movablely, the utility model has the advantages of cleaning function, when needing to clean the solvent residue, reaction byproduct and other deposits adhered to the inner wall of tower body and the top of partition plate, the external controller controls the operation of first motor, and the output end of first motor drives first gear and second gear to rotate, and second gear drives hollow tube to rotate, and hollow tube drives first scraper and second scraper to rotate, and then the solvent adhered to the surface of partition plate and the inner wall of tower body is scraped and cleaned.

Description

Technical Field

[0001] This utility model relates to the field of flue gas denitrification technology, specifically to an SNCR denitrification multi-stage gas-liquid mixing jet tower and a dynamic interception structure for ammonia escape. Background Technology

[0002] SNCR (Selective Non-Catalytic Reduction) denitrification technology involves injecting reducing agents containing amino groups, such as urea and ammonia, into the flue gas stream at a high temperature of 850-1150℃. This causes the reducing agents to react with nitrogen oxides in the flue gas, producing non-toxic and harmless nitrogen and water.

[0003] Traditional spray towers lack cleaning capabilities during operation, making it difficult to effectively scrape and clean solvent residues, reaction byproducts, and other deposits adhering to the inner walls of the tower and the surfaces of various partitions. As operating time increases, these deposits gradually thicken, not only reducing the effective flow cross-section inside the tower and increasing flue gas flow resistance, thus affecting the overall operating efficiency of the denitrification system, but also causing the spray nozzles of the spray device to become blocked, disrupting the uniformity of gas-liquid mixing, reducing the sufficiency of the denitrification reaction, and consequently decreasing the denitrification efficiency, failing to meet environmental emission requirements.

[0004] To address the above technical challenges, we designed a multi-stage gas-liquid mixing jet tower for SNCR denitrification and a dynamic interception structure for ammonia escape. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage gas-liquid mixing jet tower for SNCR denitrification and a dynamic interception structure for ammonia escape. It has the advantage of effectively scraping and cleaning solvent residues, reaction by-products and other deposits attached to the inner wall of the tower and the surface of each level of baffles. This solves the problem that it is difficult to effectively scrape and clean solvent residues, reaction by-products and other deposits attached to the inner wall of the tower and the surface of each level of baffles, thereby increasing the resistance of flue gas flow and affecting the overall operating efficiency of the denitrification system.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage gas-liquid mixing jet tower for SNCR denitrification and a dynamic interception structure for ammonia escape, comprising a tower body. The inner cavity of the tower body is sequentially and fixedly connected from top to bottom to a first partition, an inclined plate, and a second partition. A hollow tube is movably connected to the bottom of the second partition through a sealed bearing. A dividing plate is fixedly connected to the inner cavity of the tower body. The top of the hollow tube is sequentially connected to the inclined plate and the dividing plate through a sealed bearing. A circular hole is opened at the top of the dividing plate. A liquid supply pipe is connected to the surface of the hollow tube. An atomizing nozzle is connected to the bottom of the liquid supply pipe. A frame is welded to the surface of the hollow tube. A first scraper is inserted into the top of the frame. Second scrapers are bolted to the opposite side of the frame. A first motor is bolted to the rear side of the bottom of the second partition. A first gear is bolted to the output end of the first motor. A second gear is fixedly sleeved on the bottom of the surface of the hollow tube. A first rotary joint is connected to the bottom of the hollow tube. An interception mechanism is bolted to the top right side of the tower body.

[0007] Preferably, the interception mechanism includes a second motor, the left side of which is connected to the tower body by bolts. The output end of the second motor extends into the inner cavity of the tower body and is connected to a distribution pipe by bolts. Exhaust holes are provided on the front and rear sides of the distribution pipe. Stirring rods are riveted to the top and bottom of the distribution pipe. The left end of the distribution pipe extends into the left side of the tower body through a sealed bearing and is connected to a second rotary joint. A fan is connected to the top of the left side of the tower body by bolts. The air inlet of the fan is connected to the tower body, and the air outlet of the fan is connected to an air supply pipe. The top end of the air supply pipe is connected to the second rotary joint.

[0008] Preferably, the atomizing nozzle is located at the top of the circular holes, and the circular holes are arranged alternately.

[0009] Preferably, the first gear meshes with the second gear, and the top of the tower body is connected to a smoke exhaust pipe.

[0010] Preferably, the bottom of the first rotary joint is connected to a liquid inlet pipe, and the right end of the liquid inlet pipe extends through to the right side of the tower body.

[0011] Preferably, both sides of the front side of the frame are threaded with positioning bolts, and the rear end of the positioning bolts contacts the first scraper.

[0012] Preferably, a drain valve is connected to the bottom of the front side of the tower body, a liquid filling valve and a liquid drain valve are connected to the right side of the tower body respectively, and a smoke inlet pipe is connected to the bottom of the left side of the tower body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model has the advantage of cleaning function through the cooperation of inclined plate, hollow tube, frame, first scraper, second scraper, first motor, first gear and second gear. When it is necessary to clean the solvent residue, reaction by-products and other deposits attached to the inner wall of the tower and the top of the partition plate, the external controller controls the first motor to operate. The output end of the first motor drives the first gear and the second gear to rotate. The second gear drives the hollow tube to rotate. The hollow tube drives the first scraper and the second scraper to rotate, thereby scraping off and cleaning the solvent adhering to the surface of the partition plate and the inner wall of the tower.

[0014] 2. This utility model, through the cooperation of a second motor, a distribution pipe, an exhaust port, a stirring rod, a second rotary joint, a fan, and an air supply pipe, has the advantages of high interception efficiency. When the fan is running, the flue gas is transported to the distribution pipe through the fan and the air supply pipe. Then, the acidic solvent is transported to the top of the first baffle through the liquid addition valve, so that the acidic solvent submerges the distribution pipe. The flue gas comes into uniform contact with the acidic solvent through the exhaust port on the surface of the distribution pipe. Then, the external controller controls the second motor to run. The output end of the second motor drives the distribution pipe and the stirring rod to rotate, thereby making the contact between the flue gas and the acidic solvent more sufficient. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the structure of this utility model; Figure 2 This is a three-dimensional sectional view of the tower structure of this utility model; Figure 3 This is a partial three-dimensional view of the present invention; Figure 4 This is a perspective view of the interception mechanism of this utility model; Figure 5 This utility model Figure 3 A magnified view of A in the middle.

[0016] In the diagram: 1. Tower body; 2. First partition plate; 3. Inclined plate; 4. Second partition plate; 5. Hollow tube; 6. Divider plate; 7. Circular hole; 8. Liquid supply pipe; 9. Atomizing nozzle; 10. Frame; 11. First scraper; 12. Second scraper; 13. First motor; 14. First gear; 15. Second gear; 16. First rotary joint; 17. Interception mechanism; 18. Second motor; 19. Distribution pipe; 20. Exhaust port; 21. Stirring rod; 22. Second rotary joint; 23. Fan; 24. Air supply pipe; 25. Smoke exhaust pipe; 26. Liquid inlet pipe; 27. Drain valve; 28. Liquid filling valve; 29. ​​Liquid drain valve; 30. Smoke inlet pipe. Detailed Implementation

[0017] Please see Figures 1-5A multi-stage gas-liquid mixing jet tower for SNCR denitrification and a dynamic interception structure for ammonia escape are disclosed. The tower body 1 has a first baffle 2, an inclined plate 3, and a second baffle 4 fixedly connected sequentially from top to bottom within its inner cavity. The inclined plate 3, with its tilted design, facilitates the sliding of scraped impurities along its surface, preventing accumulation at the bottom of the tower body 1. Combined with a drain valve 27, it efficiently discharges waste generated during cleaning, maintaining the cleanliness of the tower body 1. The second baffle 4 provides stable support for the hollow tube 5. Connected to the hollow tube 5 via a sealed bearing, it ensures the rotational freedom of the hollow tube 5 while preventing leakage of flue gas or liquid from the connection point, enhancing the sealing performance of the tower body 1. The bottom of the second baffle 4 is movably connected to the hollow tube 5 through a sealed bearing. A hollow tube 5 serves as both a liquid supply and transmission device. On one hand, it delivers denitrifying agents such as ammonia to the liquid supply pipe 8 and the atomizing nozzle 9 through an internal channel. On the other hand, it rotates under the drive of the first motor 13, causing the second scraper 12 to clean the inner wall of the tower body 1. A partition plate 6 is fixedly connected to the inner cavity of the tower body 1. The top of the hollow tube 5 passes through the inclined plate 3 and the partition plate 6 sequentially via a sealed bearing. The top of the partition plate 6 has round holes 7. The staggered arrangement of these holes makes the flue gas path tortuous during its ascent, extending the contact time with the denitrifying agent and improving mixing uniformity. Simultaneously, it serves as a channel for impurities to fall, facilitating the discharge of scraped deposits to the inclined plate 3. The surface of the hollow tube 5 is connected to the liquid supply pipe 8, and the bottom of the liquid supply pipe 8 is connected to the atomizing nozzle 9. The atomizing nozzle 9 atomizes the denitrification agent into fine droplets, increasing the contact area with the flue gas, improving the utilization rate of the denitrification agent and the denitrification reaction rate, thus making denitrification more complete. A frame 10 is welded to the surface of the hollow tube 5, and a first scraper 11 is inserted into the top of the frame 10. By setting the first scraper 11, it rotates with the frame 10, effectively scraping away solvent residue, reaction byproducts, and other deposits attached to the top of the separator plate 6, preventing the deposits from thickening and reducing the flow cross-section, maintaining smooth flue gas flow, and ensuring the operating efficiency of the denitrification system. On the opposite side of the frame 10, a second scraper 12 is bolted to it. By setting the second scraper 12, it scrapes away deposits on the inner wall of the tower body 1 as the frame 10 rotates, preventing the accumulation of fluid on the inner wall from reducing the effective volume of the tower body 1, and simultaneously preventing… It affects the gas-liquid mixing effect. The rear side of the bottom of the second partition 4 is connected to the first motor 13 by bolts. By setting the first motor 13, the cleaning action of the scraper and the liquid supply rotation of the hollow tube 5 can be provided with power. The first motor 13 is a YE2 series three-phase asynchronous motor. The output end of the first motor 13 is connected to the first gear 14 by bolts. The bottom of the surface of the hollow tube 5 is fixedly fitted with the second gear 15. The bottom of the hollow tube 5 is connected to the first rotary joint 16. By setting the first rotary joint 16, the hollow tube 5 can achieve stable communication with the liquid inlet pipe 26 while rotating, ensuring the continuous supply of denitrification agent and avoiding pipe entanglement or leakage caused by the rotation of the hollow tube 5. The top right side of the tower body 1 is connected to the interception mechanism 17 by bolts.

[0018] Please see Figure 2 and Figure 4 The interception mechanism 17 includes a second motor 18, which drives the distribution pipe 19 and the stirring rod 21 to rotate, ensuring thorough mixing and contact between the flue gas and the acidic solvent, thus enhancing the ammonia escape interception efficiency. The second motor 18 is a YVF2 series variable frequency speed-regulating three-phase asynchronous motor. The left side of the second motor 18 is connected to the tower body 1 by bolts. The output end of the second motor 18 extends into the inner cavity of the tower body 1 and is connected to the distribution pipe 19 by bolts. Exhaust holes 20 are provided on both the front and rear sides of the distribution pipe 19. By providing exhaust holes 20, the flue gas is evenly released into the acidic solvent in the form of bubbles, increasing the gas-liquid contact efficiency and ensuring that the ammonia in the flue gas can fully react with the acidic solvent, thereby improving the interception effect. The distribution pipe 19... Stirring rods 21 are riveted to both the top and bottom. By setting the stirring rods 21, the acidic solvent is stirred when the distribution pipe 19 rotates, breaking the static state of the solvent, making the flue gas bubbles more evenly distributed in the solvent, prolonging the contact time, and enhancing the ammonia escape interception effect. The left end of the distribution pipe 19 passes through a sealed bearing to the left side of the tower body 1 and is connected to the second rotary joint 22. The top of the left side of the tower body 1 is connected to a fan 23 by bolts. By setting the fan 23, the denitrified flue gas can be efficiently transported to the interception mechanism 17 to ensure the smooth progress of the ammonia escape interception process. The air inlet of the fan 23 is connected to the tower body 1, and the air outlet of the fan 23 is connected to the air supply pipe 24. The top end of the air supply pipe 24 is connected to the second rotary joint 22.

[0019] Please see Figure 2 The atomizing nozzle 9 is located on top of the round hole 7, and the round holes 7 are arranged alternately.

[0020] Please see Figure 3 The first gear 14 meshes with the second gear 15, and the top of the tower body 1 is connected to the exhaust pipe 25.

[0021] Please see Figure 2 The bottom of the first rotary joint 16 is connected to the liquid inlet pipe 26. By setting the liquid inlet pipe 26, an external liquid supply device can be connected to the first rotary joint 16 to deliver denitrification agents such as ammonia to the hollow tube 5 to provide raw materials for the denitrification reaction. The right end of the liquid inlet pipe 26 extends to the right side of the tower body 1.

[0022] Please see Figure 3 and Figure 5 Both sides of the front side of the frame 10 are threaded with positioning bolts, and the rear end of the positioning bolts is in contact with the first scraper 11.

[0023] Please see Figure 1The bottom front of the tower body 1 is connected to a drain valve 27, which is used to discharge impurities and waste accumulated at the bottom of the tower body 1. The right side of the tower body 1 is connected to a liquid filling valve 28 and a liquid drain valve 29, which facilitate the replacement and replenishment of solvent and ensure the normal operation of the interception mechanism 17. The bottom left side of the tower body 1 is connected to a flue gas inlet pipe 30.

[0024] In operation, an external water supply pipe is connected to the liquid inlet pipe 26, supplying ammonia water into the liquid inlet pipe 26. Then, the flue gas inlet pipe 30 is connected to the flue gas pipe, allowing flue gas to be transported to the interior of the tower body 1 via the flue gas inlet pipe 30. Ammonia water is supplied to the atomizing nozzle 9 via the hollow pipe 5 and the liquid supply pipe 8. The atomizing nozzle 9 atomizes and sprays the ammonia water onto the top of the circular hole 7. As the flue gas passes through the circular hole 7, it comes into uniform contact with the ammonia water, thus denitrifying the flue gas. After denitrification, an external controller controls the operation of the fan 23. When the fan 23 is running, the flue gas is transported to the distribution pipe 19 via the fan 23 and the air supply pipe 24. Then, external acidic solvent is supplied to the top of the first partition 2 via the liquid addition valve 28, causing the acidic solvent to submerge the distribution pipe 19. The flue gas comes into uniform contact with the acidic solvent through the exhaust holes 20 on the surface of the distribution pipe 19. Subsequently, the external controller... The controller controls the second motor 18 to operate. The output of the second motor 18 drives the distribution pipe 19 and the stirring rod 21 to rotate, thereby making the contact between the flue gas and the acidic solvent more complete. After denitrification and ammonia interception, the flue gas is discharged to the top of the tower body 1 through the exhaust pipe 25. When it is necessary to clean the solvent residue, reaction by-products and other deposits attached to the inner wall of the tower body 1 and the top of the partition plate 6, the external controller controls the first motor 13 to operate. The output of the first motor 13 drives the first gear 14 and the second gear 15 to rotate. The second gear 15 drives the hollow tube 5 to rotate. The hollow tube 5 drives the first scraper 11 and the second scraper 12 to rotate, thereby scraping off and cleaning the solvent adhering to the surface of the partition plate 6 and the inner wall of the tower body 1. The impurities fall to the top of the inclined plate 3 through the round hole 7. Then, the drain valve 27 is opened to discharge the impurities.

[0025] In summary, this SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure, through the cooperation of inclined plate 3, hollow tube 5, frame 10, first scraper 11, second scraper 12, first motor 13, first gear 14 and second gear 15, solves the problem of difficulty in effectively scraping and cleaning solvent residues, reaction by-products and other deposits adhering to the inner wall of the tower and the surface of each stage of the partition, thereby increasing the flue gas flow resistance and affecting the overall operating efficiency of the denitrification system.

Claims

1. A multi-stage gas-liquid mixing jet tower for SNCR denitrification and a dynamic interception structure for ammonia escape, comprising a tower body (1), characterized in that: The inner cavity of the tower body (1) is fixedly connected from top to bottom to a first partition plate (2), an inclined plate (3), and a second partition plate (4). The bottom of the second partition plate (4) is movably connected to a hollow tube (5) through a sealed bearing. The inner cavity of the tower body (1) is fixedly connected to a partition plate (6). The top of the hollow tube (5) passes through the inclined plate (3) and the partition plate (6) through a sealed bearing. The top of the partition plate (6) is provided with a round hole (7). The surface of the hollow tube (5) is connected to a liquid supply pipe (8). The bottom of the liquid supply pipe (8) is connected to an atomizing nozzle (9). The surface of the hollow tube (5) is connected to a liquid supply pipe (8). A frame (10) is welded to the surface. A first scraper (11) is inserted into the top of the frame (10). A second scraper (12) is bolted to the opposite side of the frame (10). A first motor (13) is bolted to the rear side of the bottom of the second partition (4). A first gear (14) is bolted to the output end of the first motor (13). A second gear (15) is fixedly sleeved on the bottom of the surface of the hollow tube (5). A first rotary joint (16) is connected to the bottom of the hollow tube (5). An interception mechanism (17) is bolted to the top right side of the tower body (1).

2. The SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure according to claim 1, characterized in that: The interception mechanism (17) includes a second motor (18). The left side of the second motor (18) is connected to the tower body (1) by bolts. The output end of the second motor (18) passes through the inner cavity of the tower body (1) and is connected to a distribution pipe (19) by bolts. The front and rear sides of the distribution pipe (19) are provided with exhaust holes (20). The top and bottom of the distribution pipe (19) are riveted with stirring rods (21). The left end of the distribution pipe (19) passes through the left side of the tower body (1) through a sealed bearing and is connected to a second rotary joint (22). The top of the left side of the tower body (1) is connected to a fan (23) by bolts. The air inlet of the fan (23) is connected to the tower body (1). The air outlet of the fan (23) is connected to an air supply pipe (24). The top of the air supply pipe (24) is connected to the second rotary joint (22).

3. The SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure according to claim 1, characterized in that: The atomizing nozzle (9) is located at the top of the circular holes (7), which are arranged alternately.

4. The SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure according to claim 1, characterized in that: The first gear (14) meshes with the second gear (15), and the top of the tower body (1) is connected to a smoke exhaust pipe (25).

5. The SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure according to claim 1, characterized in that: The bottom of the first rotary joint (16) is connected to a liquid inlet pipe (26), and the right end of the liquid inlet pipe (26) extends through to the right side of the tower body (1).

6. The SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure according to claim 1, characterized in that: Both sides of the front side of the frame (10) are threaded with positioning bolts, and the rear end of the positioning bolts is in contact with the first scraper (11).

7. The SNCR denitrification multi-stage gas-liquid mixing jet tower and ammonia escape dynamic interception structure according to claim 1, characterized in that: The bottom of the front side of the tower body (1) is connected to a drain valve (27), the right side of the tower body (1) is connected to a liquid filling valve (28) and a liquid drain valve (29), and the bottom of the left side of the tower body (1) is connected to a smoke inlet pipe (30).

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