An SCR denitrification device

Abstract

This utility model relates to the field of denitrification technology, specifically an SCR denitrification device, including a denitrification pipe connected to a heating pipe at one end. The denitrification pipe contains a nozzle and multiple sets of catalysts. A sealing groove is installed on one side of the heating pipe, and a rotating shaft rotates inside the sealing groove. A guide pipe A is installed on one side of the sealing groove, and a piston driven by the rotating shaft slides inside the guide pipe A. One end of the guide pipe A is connected to a storage tank, and the other side of the storage tank is connected to multiple sets of guide pipes B. This utility model uses vibration to detach dust and impurities adhering to the inner wall of the denitrification pipe, which are then transported downstream with the main flow of flue gas. This eliminates the potential for insufficient mixing of ammonia and flue gas caused by ash buildup and blockage in the pipe. Simultaneously, it keeps the pipe's flow cross-section clean, preventing uneven flue gas flow or increased system resistance due to ash accumulation, ensuring sufficient contact between the catalyst and flue gas, and maintaining stable denitrification reaction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of denitrification technology, specifically to an SCR denitrification device. Background Technology

[0002] In today's era of rapid industrialization, environmental pollution is becoming increasingly serious. Nitrogen oxides, as one of the major pollutants, pose a significant threat. Nitrogen oxides mainly include nitric oxide and nitrogen dioxide. Once their concentration and duration in the atmosphere reach a level that has a harmful effect on humans, animals, plants, and other substances, they constitute pollution. When traditional equipment is used for a long time, a lot of dust and impurities carried by flue gas will adhere to the inner wall of the pipe. As the impurities accumulate over a long period of time, the direction and velocity of the flue gas will change when it enters the pipe. This will prevent the flue gas from fully contacting the ammonia and catalyst, resulting in a decrease in reaction efficiency. Utility Model Content

[0003] This invention uses vibration to remove dust and impurities adhering to the inner wall of the denitrification pipeline, allowing them to be transported downstream with the main flow of flue gas. This eliminates the potential problem of insufficient mixing of ammonia and flue gas caused by ash buildup and blockage in the pipeline. At the same time, it keeps the pipeline flow section clean, preventing uneven flue gas flow rate or increased system resistance caused by ash buildup, ensuring sufficient contact between the catalyst and flue gas, and maintaining stable denitrification reaction efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an SCR denitrification device, comprising a denitrification pipe connected to a heating pipe at one end, a nozzle and multiple sets of catalysts installed inside the denitrification pipe, a sealing groove installed on one side of the heating pipe, a rotating shaft rotating inside the sealing groove, a guide pipe A installed on one side of the sealing groove, a piston driven by the rotating shaft sliding inside the guide pipe A, a storage tank connected to one end of the guide pipe A, multiple sets of guide pipes B connected to the other side of the storage tank, and a pressure relief valve installed on the outside of each set of guide pipes B; A guide pipe is installed on the other side of the sealing groove. Inside the guide pipe, there are fan blades driven by a rotating shaft. One end of the guide pipe is connected to an air jet groove.

[0005] Preferably, one end of the nozzle is connected to a connecting pipe B, and the other end of the connecting pipe B is connected to a water storage tank. A pump is installed inside the water storage tank, and the output end of the pump is connected to the water storage tank.

[0006] Preferably, multiple sets of blades are fixedly connected to the outside of the rotating shaft, a reciprocating screw is fixedly connected to one end of the rotating shaft, the other end of the reciprocating screw extends through the sealing groove into the inside of the guide tube A, and the guide tube A is connected to the piston ball nut pair.

[0007] Preferably, one end of the guide tube A is connected to a connecting tube A, the other end of the connecting tube A is connected to the storage tank, the other side of the storage tank is connected to a connecting tube C, the other end of the connecting tube C is connected to three sets of guide tubes B, and a one-way valve is provided at the connection between the connecting tube A and the storage tank, and a pressure valve is provided at the connection between the connecting tube C and the storage tank.

[0008] Preferably, a push rod is slidably connected inside the guide tube B, one end of the push rod is fixedly connected to a spring, and the other end of the spring is connected to the inner wall of the push rod.

[0009] Preferably, a connecting rod is fixedly connected to the other end of the rotating shaft, the other end of the connecting rod extends through the sealing groove into the inside of the guide pipe, the other end of the connecting rod is connected to the fan blade, one end of the guide pipe is connected to a connecting pipe D, and the other end of the connecting pipe D is connected to the jet groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. Vibration causes dust and impurities adhering to the inner wall of the denitrification pipeline to detach from the pipe wall and be transported downstream with the main flow of flue gas. This removes the hidden danger of insufficient mixing of ammonia and flue gas caused by ash blockage in the pipeline. At the same time, it keeps the pipeline flow section clean, prevents uneven flue gas flow rate or increased system resistance caused by ash accumulation, ensures full contact between the catalyst and flue gas, and maintains stable denitrification reaction efficiency.

[0011] 2. The gas ejected through the jet channel creates a weak thrust, breaking the original laminar flow state of the flue gas and promoting full collision and diffusion between the ammonia droplets and the flue gas. This prevents the local ammonia concentration from being too high or too low, thereby promoting full mixing of ammonia and flue gas. At the same time, the thrust slows down the overall flow velocity of the flue gas inside the denitrification pipeline, allowing the ammonia and flue gas to have more time to contact each other, reducing the problem of insufficient reaction caused by excessively fast airflow. Furthermore, the weak thrust can disperse the eddies formed in the channel, guiding the airflow to flow smoothly and preventing local flue gas stagnation or short circuits at the corners of the denitrification pipeline. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an SCR denitrification device according to the present invention; Figure 2 This is one of the internal structural diagrams of an SCR denitrification device according to this utility model; Figure 3 This is the second internal structural diagram of an SCR denitrification device according to this utility model; Figure 4 This is a partial structural cross-sectional view of an SCR denitrification device according to this utility model; Figure 5 This is a partial structural cross-sectional view of an SCR denitrification device according to this utility model; Figure 6 This utility model relates to an SCR denitrification device. Figure 3 Enlarged view of the structure at point A in the middle.

[0013] In the diagram: 1. Heating pipe; 2. Denitrification pipe; 3. Sealing groove; 4. Rotating shaft; 5. Blade; 6. Reciprocating screw; 7. Piston; 8. Guide pipe A; 9. Connecting pipe A; 10. Storage tank; 11. Nozzle; 12. Connecting pipe B; 13. Water storage tank; 14. Connecting pipe C; 15. Guide pipe B; 16. Push rod; 17. Spring; 18. Catalyst; 19. Flow guide pipe; 20. Fan blade; 21. Connecting rod; 22. Connecting pipe D; 23. Jet trough. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 6 This utility model provides an SCR denitrification device, including a denitrification pipe 2 connected to one end of a heating pipe 1. The denitrification pipe 2 is equipped with a nozzle 11 and multiple sets of catalysts 18. A sealing groove 3 is installed on one side of the heating pipe 1. The sealing groove 3 is rotated by a rotating shaft 4. A guide tube A8 is installed on one side of the sealing groove 3. A piston 7 driven by the rotating shaft 4 slides inside the guide tube A8. One end of the guide tube A8 is connected to a storage tank 10. The other side of the storage tank 10 is connected to multiple sets of guide tubes B15. Each set of guide tubes B15 is equipped with a pressure relief valve on its outer side. A guide pipe 19 is installed on the other side of the sealing groove 3. Inside the guide pipe 19, there is a fan blade 20 driven by a rotating shaft 4. One end of the guide pipe 19 is connected to a jet groove 23.

[0016] In an optional embodiment, one end of the nozzle 11 is connected to a connecting pipe B12, and the other end of the connecting pipe B12 is connected to a water storage tank 13. A pump is installed inside the water storage tank 13, and the output end of the pump is connected to the water storage tank 13. When the device is in use, the flue gas enters the denitrification pipe 2 through the heating pipe 1. As the flue gas passes through the heating pipe 1, the heating pipe 1 heats the flue gas. The water storage tank 13 stores ammonia water. After the flue gas enters the denitrification pipe 2, the pump will transport the ammonia water stored in the water storage tank 13 to the nozzle 11 through the connecting pipe B12. After the ammonia water is sprayed out through the nozzle 11, it will fully contact and mix with the flue gas. As the flue gas gradually flows, the flue gas mixed with ammonia water will come into contact with multiple sets of catalysts 18. After the flue gas comes into contact with the catalysts 18, the flue gas will generate nitrogen and water under the action of the catalysts 18, and then be discharged from the output end of the denitrification pipe 2.

[0017] In an optional embodiment, multiple sets of blades 5 are fixedly connected to the outside of the rotating shaft 4, and a reciprocating screw 6 is fixedly connected to one end of the rotating shaft 4. The other end of the reciprocating screw 6 extends through the sealing groove 3 into the inside of the guide tube A8, and the guide tube A8 is connected to the piston 7 ball nut pair. When the flue gas enters the heating pipe 1, the flow of the flue gas will drive multiple sets of blades 5 to rotate. When the multiple sets of blades 5 rotate, they will drive the rotating shaft 4 to rotate synchronously. When the rotating shaft 4 rotates, it will drive the reciprocating screw 6 to rotate synchronously. When the reciprocating screw 6 rotates, it will drive the piston 7 to move back and forth. When the piston 7 moves back and forth, it will continuously deliver gas to the inside of the connecting pipe A9.

[0018] In an optional embodiment, one end of the guide tube A8 is connected to the connecting tube A9, the other end of the connecting tube A9 is connected to the storage tank 10, the other side of the storage tank 10 is connected to the connecting tube C14, the other end of the connecting tube C14 is connected to three sets of guide tubes B15, and a one-way valve is provided at the connection between the connecting tube A9 and the storage tank 10, and a pressure valve is provided at the connection between the connecting tube C14 and the storage tank 10. As described above, after the gas enters the connecting pipe A9, the connecting pipe A9 will transport the gas to the storage tank 10. Under the action of the one-way valve, the gas will only enter the storage tank 10 and will not flow back into the connecting pipe A9. As the gas gradually enters the storage tank 10, the gas pressure inside the storage tank 10 will gradually increase. When the gas pressure inside the storage tank 10 gradually increases to a certain threshold, the gas pressure valve at the connection between the storage tank 10 and the guide pipe B15 will open. After the gas pressure valve opens, due to the large gas pressure inside the storage tank 10, the gas inside the storage tank 10 will quickly enter the connecting pipe C14.

[0019] In an optional embodiment, a push rod 16 is slidably connected inside the guide tube B15, one end of the push rod 16 is fixedly connected to a spring 17, and the other end of the spring 17 is connected to the inner wall of the push rod 16. After the gas rapidly enters the connecting pipe C14, it is transported to the guide pipe B15. Once inside the guide pipe B15, the gas quickly pushes the push rod 16 outwards. After the push rod 16 is pushed outwards, it contacts the outer wall of the denitrification pipe 2, causing it to vibrate. This vibration dislodging dust and impurities adhering to the inner wall of the denitrification pipe 2. As the dust and impurities are dislodged, they flow back into the pipe along with the flue gas. The end contacts the catalyst 18, and then repeats this process. When using the device, the denitrification pipe 2 is knocked and vibrated at regular intervals. This vibration causes the dust and impurities attached to the inner wall of the denitrification pipe 2 to detach from the pipe wall and be transported downstream with the main flow of flue gas. This removes the hidden danger of insufficient mixing of ammonia and flue gas caused by ash blockage in the pipe, and keeps the flow section of the pipe clean. This prevents uneven flue gas flow rate or increased system resistance caused by ash accumulation, ensures sufficient contact between the catalyst 18 and the flue gas, and maintains stable denitrification reaction efficiency. After the gas enters the guide tube B15, as the gas inside the guide tube B15 is gradually discharged through the pressure relief valve, the push rod 16 will gradually return to its original position due to the tension of the spring 17.

[0020] In an optional embodiment, a connecting rod 21 is fixedly connected to the other end of the rotating shaft 4. The other end of the connecting rod 21 extends through the sealing groove 3 into the interior of the guide pipe 19. The other end of the connecting rod 21 is connected to the fan blade 20. One end of the guide pipe 19 is connected to a connecting pipe D22, and the other end of the connecting pipe D22 is connected to the jet groove 23. When the rotating shaft 4 rotates, it synchronously drives the connecting rod 21 to rotate. When the connecting rod 21 rotates, it synchronously drives the fan blade 20 to rotate. When the fan blade 20 rotates, it delivers airflow into the connecting pipe D22. After the airflow enters the connecting pipe D22, it is delivered to the jet outlet 23 for discharge. As the airflow exits through the jet outlet 23, because the jet outlet 23 is located at the upper end of the denitrification pipe 2 and at a corner of the denitrification pipe 2, the airflow generates a small reverse resistance to the flue gas, and the airflow promotes the denitrification pipe... The flow of flue gas at the corner of the denitrification pipe 2 creates a slight thrust through the gas ejected from the jet vent 23, breaking the original laminar flow state of the flue gas. This promotes the full collision and diffusion of ammonia droplets with the flue gas, preventing the local ammonia concentration from being too high or too low. This, in turn, promotes the full mixing of ammonia and flue gas. At the same time, the thrust slows down the overall flow velocity of the flue gas inside the denitrification pipe 2, allowing the ammonia and flue gas to have more time to contact each other, reducing the problem of insufficient reaction caused by excessively fast airflow. Furthermore, the slight thrust can disperse the eddies formed in the channel, guiding the airflow to flow smoothly and preventing local flue gas stagnation or short circuits at the corner of the denitrification pipe 2.

[0021] Working principle: When using the device, the flue gas enters the denitrification pipe 2 through the heating pipe 1. The heating pipe 1 heats the flue gas as it passes through the pipe. The water storage tank 13 stores ammonia. After the flue gas enters the denitrification pipe 2, the pump will transport the ammonia stored in the water storage tank 13 to the nozzle 11 through the connecting pipe B12. After the ammonia is sprayed out through the nozzle 11, it will fully mix with the flue gas. As the flue gas gradually flows, the flue gas mixed with ammonia will come into contact with multiple catalysts 18. After the flue gas comes into contact with the catalysts 18, the flue gas will generate nitrogen and water under the action of the catalysts 18, and then be discharged from the output end of the denitrification pipe 2. When the flue gas enters the heating pipe 1, the flow of the flue gas will drive multiple sets of blades 5 to rotate. When the multiple sets of blades 5 rotate, they will drive the rotating shaft 4 to rotate synchronously. When the rotating shaft 4 rotates, it will drive the reciprocating screw 6 to rotate synchronously. When the reciprocating screw 6 rotates, it will drive the piston 7 to move back and forth. When the piston 7 moves back and forth, it will continuously deliver gas to the inside of the connecting pipe A9. After the gas enters the connecting pipe A9, the connecting pipe A9 will transport the gas to the storage tank 10. Under the action of the one-way valve, the gas will only enter the storage tank 10 and will not flow back to the connecting pipe A9. As the gas gradually enters the storage tank 10, the gas pressure inside the storage tank 10 will gradually increase. When the gas pressure inside the storage tank 10 gradually increases to a certain threshold, the gas pressure valve at the connection between the storage tank 10 and the guide pipe B15 will be opened. After the gas pressure valve is opened, due to the large gas pressure inside the storage tank 10, the gas inside the storage tank 10 will quickly enter the connecting pipe C14. After the gas quickly enters the connecting pipe C14, the connecting pipe C14 will transport the gas to the guide pipe B15. After the gas enters the guide pipe B15, the gas will quickly push the push rod 16 outward. After the push rod 16 is pushed outward, it will contact the outer wall of the denitrification pipe 2, thereby causing knocking vibration to the denitrification pipe 2. When the rotating shaft 4 rotates, it will synchronously drive the connecting rod 21 to rotate. When the connecting rod 21 rotates, it will synchronously drive the fan blade 20 to rotate. When the fan blade 20 rotates, it will deliver the airflow into the connecting pipe D22. After the airflow enters the connecting pipe D22, the connecting pipe D22 will deliver the airflow to the jet chute 23 for discharge. When the airflow is discharged through the jet chute 23, because the jet chute 23 is located at the upper end of the denitrification pipe 2 and at the corner of the denitrification pipe 2, the airflow will generate a small reverse resistance to the flue gas when it is ejected through the jet chute 23.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An SCR denitrification device, comprising a denitrification pipe (2) connected to one end of a heating pipe (1), wherein a nozzle (11) and multiple sets of catalysts (18) are installed inside the denitrification pipe (2), characterized in that, A sealing groove (3) is installed on one side of the heating pipe (1). A rotating shaft (4) rotates inside the sealing groove (3). A guide pipe A (8) is installed on one side of the sealing groove (3). A piston (7) driven by the rotating shaft (4) slides inside the guide pipe A (8). One end of the guide pipe A (8) is connected to a storage tank (10). The other side of the storage tank (10) is connected to multiple sets of guide pipes B (15). A pressure relief valve is installed on the outside of each set of guide pipes B (15). A guide pipe (19) is installed on the other side of the sealing groove (3). Inside the guide pipe (19) is a fan blade (20) driven by a rotating shaft (4). One end of the guide pipe (19) is connected to a jet groove (23).

2. The SCR denitrification device according to claim 1, characterized in that, One end of the nozzle (11) is connected to a connecting pipe B (12), and the other end of the connecting pipe B (12) is connected to a water storage tank (13). A pump is installed inside the water storage tank (13), and the output end of the pump is connected to the water storage tank (13).

3. The SCR denitrification device according to claim 1, characterized in that, Multiple sets of blades (5) are fixedly connected to the outside of the rotating shaft (4). A reciprocating screw (6) is fixedly connected to one end of the rotating shaft (4). The other end of the reciprocating screw (6) extends through the sealing groove (3) into the guide tube A (8). The guide tube A (8) is connected to the piston (7) ball nut pair.

4. The SCR denitrification device according to claim 1, characterized in that, One end of the guide tube A (8) is connected to the connecting tube A (9), and the other end of the connecting tube A (9) is connected to the storage tank (10). The other side of the storage tank (10) is connected to the connecting tube C (14), and the other end of the connecting tube C (14) is connected to three sets of guide tubes B (15). A one-way valve is provided at the connection between the connecting tube A (9) and the storage tank (10), and a pressure valve is provided at the connection between the connecting tube C (14) and the storage tank (10).

5. The SCR denitrification device according to claim 1, characterized in that, The guide tube B (15) is slidably connected to a push rod (16), one end of which is fixedly connected to a spring (17), and the other end of the spring (17) is connected to the inner wall of the push rod (16).

6. The SCR denitrification device according to claim 1, characterized in that, The other end of the rotating shaft (4) is fixedly connected to a connecting rod (21). The other end of the connecting rod (21) extends through the sealing groove (3) into the inside of the guide pipe (19). The other end of the connecting rod (21) is connected to the fan blade (20). One end of the guide pipe (19) is connected to a connecting pipe D (22). The other end of the connecting pipe D (22) is connected to the jet groove (23).

Images