Boiler denitration agent feeding mechanism
By using rotating components and high-temperature preheating technology, the problems of uneven spraying and low activity of the reagents were solved, achieving uniform distribution and efficient reaction of the reagents in the denitrification tower, thereby improving the denitrification effect and energy utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-04-03
AI Technical Summary
Uneven spraying of reagents in existing boiler denitrification towers results in reagent concentrations that are too low or too high in some areas, affecting reaction efficiency. Furthermore, the low activity of reagents at room temperature limits the reaction rate, leading to reagent waste and side reactions.
It employs a rotating component and a dispensing component, achieving 360-degree uniform spraying of the agent through a rotating nozzle, and utilizing high-temperature gas to preheat the agent to enhance its activity. Combined with a jacket layer and a purification device, it improves the agent's reaction efficiency.
This method achieves uniform distribution of reagents within the denitrification tower, improves the contact efficiency between nitrogen oxides and reagents, enhances the denitrification effect, and improves reagent activity and energy utilization through waste heat utilization.
Smart Images
Figure CN224071644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas denitrification technology, and in particular to a boiler denitrification agent dispensing mechanism. Background Technology
[0002] With the acceleration of industrialization, the problem of nitrogen oxide emissions generated by boilers during their operation, as important equipment for industrial production and energy supply, is becoming increasingly serious. Nitrogen oxides not only cause environmental hazards such as acid rain and photochemical smog, but also pose a great threat to human health. Currently, nitrogen oxides generated by boilers are usually introduced into denitrification towers for denitrification treatment.
[0003] The dosing mechanism in denitrification towers mostly adopts a static spraying method. However, because the agent is sprayed from a nozzle at a fixed position, it is impossible to achieve uniform distribution within the denitrification tower. In the denitrification towers of large industrial boilers, this uneven spraying results in some areas having too low an agent concentration, preventing nitrogen oxides from reacting fully, while other areas have too high an agent concentration, leading to agent waste and potentially triggering other side reactions. Furthermore, most dosing mechanisms use direct injection of agents at room temperature. Since the denitrification agent molecules have low activity at room temperature, the reaction rate with nitrogen oxides in the boiler flue gas is limited, thus affecting the denitrification effect.
[0004] Therefore, a boiler denitrification agent dispensing mechanism is proposed. Utility Model Content
[0005] The purpose of this invention is to provide a boiler denitrification agent dispensing mechanism that solves the problem that existing dispensing mechanisms mostly use static spraying, which results in uneven distribution of the agent within the denitrification tower because the agent is sprayed from a fixed nozzle. In the denitrification tower of large industrial boilers, this uneven spraying leads to some areas having too low an agent concentration, preventing nitrogen oxides from reacting fully, while other areas have too high an agent concentration, resulting in agent waste and potentially triggering other side reactions. Furthermore, most dispensing mechanisms use direct injection of agents at room temperature, but the low molecular activity of denitrification agents at room temperature limits the reaction rate with nitrogen oxides in the boiler flue gas, thus affecting the denitrification effect.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a boiler denitrification agent dispensing mechanism, comprising a denitrification tower, a controller disposed on the front side of the surface of the denitrification tower, a rotating assembly disposed inside the denitrification tower, the rotating assembly comprising a first bevel gear, a dispensing assembly fixedly connected inside the first bevel gear, a collar fixedly connected to the surface of the denitrification tower, a jacket layer fixedly connected inside the collar, and an agent tank fixedly connected inside the jacket layer;
[0007] The dispensing assembly includes a liquid pump, the suction end of which extends into the interior of the reagent tank, and the discharge end of which is fixedly connected to a connecting pipe. The other end of the connecting pipe passes through the denitrification tower and is fixedly connected to a rotary joint. The rotating end of the rotary joint is fixedly connected to a metal diversion pipe, and the bottom surface of the metal diversion pipe is fixedly connected to a branch pipe. The number of branch pipes is set to several and arranged in a ring. The bottom surface of the branch pipe is fixedly connected to multiple atomizing nozzles.
[0008] Preferably, the first bevel gear is fixedly sleeved on the surface of the metal distributor, and the bottom of the first bevel gear is meshed with a second bevel gear.
[0009] Preferably, a transmission rod is fixedly connected to the left side of the second bevel gear. The transmission rod passes through the denitrification tower and is rotatably connected to the denitrification tower. A drive motor is fixedly connected to the end of the transmission rod away from the second bevel gear. The drive motor is fixedly connected to the denitrification tower.
[0010] Preferably, the denitrification tower is internally fixedly connected to a support ring, and a protective shell is fixedly connected to the middle of the top of the support ring. The metal diverter pipe passes through the support ring and the protective shell and is rotatably connected to them. The first bevel gear and the second bevel gear are both located inside the protective shell.
[0011] Preferably, a heat pipe is fixedly connected to the bottom of the jacket layer, a guide pipe is fixedly connected to the bottom of the heat pipe, and a mounting frame is fixedly connected to the bottom of the guide pipe.
[0012] Preferably, the mounting frame has a first movable box and a second movable box slidably connected inside, and a positioning plate is fixedly connected to the right side of both the first movable box and the second movable box. The positioning plate is bolted to the right side of the mounting frame. The bottom of the inner wall of both the first movable box and the second movable box is made of metal mesh. The first movable box contains a block desiccant, and the second movable box contains a block activated carbon.
[0013] Preferably, an air pump is fixedly connected to the bottom of the mounting frame, the air outlet of the air pump is fixedly connected to the mounting frame, the air inlet of the air pump is fixedly connected to a conduit, and the other end of the conduit is fixedly connected to the top of the denitrification tower.
[0014] Preferably, an air outlet pipe is fixedly connected to the right side of the jacket layer surface, and a control valve is provided inside the air outlet pipe.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. This application sets up a dispensing component, which enables the agent sprayed from the atomizing nozzle to be evenly distributed in a ring within the denitrification tower. The evenly sprayed agent can fully contact the nitrogen oxides in the flue gas, avoiding situations where the agent concentration in local areas is too low or too high.
[0017] 2. By setting up a rotating component, this application enables the agent sprayed from the atomizing nozzle to be sprayed evenly in a 360-degree ring within the denitrification tower. This ensures that the agent can evenly cover the internal space of the denitrification tower, guaranteeing that nitrogen oxides throughout the tower can fully contact and react with the agent, thereby further improving the denitrification effect. Attached Figure Description
[0018] Figure 1 This is an overall structural diagram of the boiler denitrification agent dispensing mechanism of this utility model;
[0019] Figure 2 This utility model Figure 1 Structural sectional view;
[0020] Figure 3 This is a schematic diagram of the structure of the rotating component of this utility model;
[0021] Figure 4 This is a schematic diagram of the dispensing component of this utility model;
[0022] Figure 5 This is a schematic diagram showing the connection between the jacket layer and the medicine tank of this utility model;
[0023] Figure 6 This is a schematic diagram showing the connection between the mounting frame, the first movable box, and the second movable box of this utility model.
[0024] In the diagram, 1. Denitrification tower; 2. Controller; 3. Rotating assembly; 301. First bevel gear; 302. Second bevel gear; 303. Transmission rod; 304. Drive motor; 305. Protective shell; 4. Dosing assembly; 401. Liquid pump; 402. Connecting pipe; 403. Rotary joint; 404. Metal diverter pipe; 405. Branch pipe; 406. Atomizing nozzle; 5. Collar; 6. Jacket layer; 7. Chemical tank; 8. Support ring; 9. Heat pipe; 10. Guide pipe; 11. Mounting frame; 12. First moving box; 13. Second moving box; 14. Positioning plate; 15. Block desiccant; 16. Block activated carbon; 17. Air pump; 18. Conduit; 19. Air outlet pipe; 20. Control valve. Detailed Implementation
[0025] 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.
[0026] Please see Figure 1-6 The present invention provides the following technical solution:
[0027] A boiler denitrification agent dispensing mechanism includes a denitrification tower 1, a controller 2 is provided on the front side of the surface of the denitrification tower 1, a rotating component 3 is provided inside the denitrification tower 1, the rotating component 3 includes a first bevel gear 301, a dispensing component 4 is fixedly connected inside the first bevel gear 301, a collar 5 is fixedly connected to the surface of the denitrification tower 1, a jacket layer 6 is fixedly connected inside the collar 5, and an agent tank 7 is fixedly connected inside the jacket layer 6.
[0028] The dispensing component 4 includes a liquid pump 401, the suction end of which extends into the interior of the reagent tank 7. The discharge end of the liquid pump 401 is fixedly connected to a connecting pipe 402. The other end of the connecting pipe 402 passes through the denitrification tower 1 and is fixedly connected to a rotary joint 403. The rotating end of the rotary joint 403 is fixedly connected to a metal diversion pipe 404. The surface of the bottom end of the metal diversion pipe 404 is fixedly connected to a branch pipe 405. The number of branch pipes 405 is set to several and they are arranged in a ring. The bottom of the surface of the branch pipe 405 is fixedly connected to multiple atomizing nozzles 406.
[0029] In this embodiment: by setting the dispensing component 4, the suction generated by the pump 401 can efficiently draw the medicine from the medicine tank 7, ensuring that the medicine can be continuously and quantitatively delivered. The connecting pipe 402 can stably transfer the medicine to the rotary joint 403, ensuring the continuity and safety of the medicine delivery. The rotary joint 403 can realize the sealed connection and medicine delivery between the fixed connecting pipe 402 and the rotating metal diverter pipe 404. As the metal diverter pipe 404 rotates with the rotating component 3, the rotary joint 403 can ensure that the medicine is continuously and stably delivered from the connecting pipe 402. 2. The agent flows into the metal distribution pipe 404, ensuring the sealing of the connection to prevent leakage. This ensures that the agent is not affected by the rotation of the metal distribution pipe 404 during transportation, laying the foundation for uniform spraying. After the agent flows into the metal distribution pipe 404, it is evenly distributed to each atomizing nozzle 406 through the branch pipe 405. The atomized agent sprayed from the atomizing nozzle 406 can be evenly distributed in a ring within the denitrification tower 1, greatly increasing the contact area between the agent and nitrogen oxides in the flue gas, improving the efficiency and uniformity of the denitrification reaction, and effectively enhancing the overall denitrification effect.
[0030] Specifically, such as Figure 3 As shown, the first bevel gear 301 is fixedly sleeved on the surface of the metal diverter 404, and the bottom of the first bevel gear 301 is meshed with the second bevel gear 302.
[0031] Specifically, such as Figure 2 , Figure 3 As shown, a transmission rod 303 is fixedly connected to the left side of the second bevel gear 302. The transmission rod 303 passes through the denitrification tower 1 and is rotatably connected to the denitrification tower 1. A drive motor 304 is fixedly connected to the end of the transmission rod 303 away from the second bevel gear 302. The drive motor 304 is fixedly connected to the denitrification tower 1.
[0032] Specifically, such as Figure 2 , Figure 3 As shown, a support ring 8 is fixedly connected inside the denitrification tower 1, and a protective shell 305 is fixedly connected to the middle of the top of the support ring 8. A metal diversion pipe 404 passes through the support ring 8 and the protective shell 305 and is rotatably connected to them. The first bevel gear 301 and the second bevel gear 302 are both located inside the protective shell 305.
[0033] In this embodiment: Through the above settings, the drive motor 304 can drive the transmission rod 303 to rotate. When the transmission rod 303 rotates, it will drive the second bevel gear 302 to rotate. When the second bevel gear 302 rotates, it will drive the first bevel gear 301 and the metal diversion pipe 404 to rotate together. This allows the power of the drive motor 304 to be effectively transmitted to the metal diversion pipe 404, realizing the rotation function of the dispensing component 4. The support ring 8 can provide support for the metal diversion pipe 404, the first bevel gear 301, the second bevel gear 302 and other components. The support ring 8 can withstand the weight of the metal diversion pipe 404 during rotation and the centrifugal force generated by rotation, ensuring that these components maintain a stable position in the denitrification tower 1, preventing displacement or deformation caused by gravity or other external forces, and ensuring the accuracy and stability of the reagent dispensing. The protective shell 305 can provide protection for the first bevel gear 301 and the second bevel gear 302, avoiding external adverse factors from affecting the normal operation of the first bevel gear 301 and the second bevel gear 302, thereby ensuring that the rotating component 3 and the dispensing component 4 can be used stably.
[0034] Specifically, such as Figure 6 As shown, a heat pipe 9 is fixedly connected to the bottom of the jacket layer 6, a guide pipe 10 is fixedly connected to the bottom of the heat pipe 9, and an installation frame 11 is fixedly connected to the bottom of the guide pipe 10.
[0035] Specifically, such as Figure 6As shown, a first movable box 12 and a second movable box 13 are slidably connected inside the mounting frame 11, and a positioning plate 14 is fixedly connected to the right side of both the first movable box 12 and the second movable box 13. The positioning plate 14 is bolted to the right side of the mounting frame 11. The bottom of the inner wall of both the first movable box 12 and the second movable box 13 is made of metal mesh. A block desiccant 15 is provided inside the first movable box 12, and a block activated carbon 16 is provided inside the second movable box 13.
[0036] Specifically, such as Figure 1 As shown, an air pump 17 is fixedly connected to the bottom of the mounting frame 11. The air outlet of the air pump 17 is fixedly connected to the mounting frame 11, and the air inlet of the air pump 17 is fixedly connected to a conduit 18. The other end of the conduit 18 is fixedly connected to the top of the denitrification tower 1.
[0037] Specifically, such as Figure 5 As shown, an air outlet pipe 19 is fixedly connected to the right side of the surface of the jacket layer 6, and a control valve 20 is installed inside the air outlet pipe 19.
[0038] In this embodiment: With the above configuration, the air pump 17 can extract the high-temperature gas that has undergone desulfurization treatment from the denitrification tower 1, and then send the extracted high-temperature gas into the installation frame 11 for purification. When the high-temperature gas enters the installation frame 11, the gas first passes through the first moving box 12, where the block desiccant 15 can adsorb moisture in the gas, reducing gas humidity and preventing moisture from adversely affecting subsequent heat conduction and reagent preheating processes. Then, the gas enters the second moving box 13, where the block activated carbon 16 can further adsorb residual impurities and harmful gases in the gas, improving the safety and effectiveness of waste heat utilization. Simultaneously, the first and second moving boxes 12 and 13 are equipped with the block desiccant 15... After the block activated carbon 16 is saturated with adsorption, it can be easily removed for replacement or regeneration, improving the convenience of maintenance. Then, the purified high-temperature gas can enter the jacket layer 6 through the guide pipe 10 and the heat pipe 9, so that the heat carried by the high-temperature gas can be transferred to the reagent tank 7 in the jacket layer 6, thereby preheating the denitrification agent in the reagent tank 7. The gas with reduced temperature can be discharged from the jacket layer 6 through the gas outlet pipe 19, ensuring the normal circulation of gas in the jacket layer 6. Through this heat conduction method, the agent has higher reactivity before entering the denitrification tower 1, improving the denitrification efficiency. At the same time, the waste heat generated during the denitrification process is fully utilized, improving the energy utilization rate.
[0039] Working principle: First, the flue gas generated by the boiler is introduced into the denitrification tower 1. Then, the drive motor 304 and the liquid pump 401 are started by the controller 2. The drive motor 304 drives the second bevel gear 302 to rotate through the transmission rod 303. The second bevel gear 302 drives the first bevel gear 301 and the metal diversion pipe 404 to rotate. The agent drawn out by the liquid pump 401 is transported to the rotary joint 403 through the connecting pipe 402. When the agent reaches the rotary joint 403, the rotating end of the rotary joint 403 guides the agent into the metal diversion pipe 404. As the metal diversion pipe 404 rotates, the agent is sprayed out from the atomizing nozzle 406 through the branch pipe 405, and is evenly sprayed in a ring shape in the denitrification tower 1. The sprayed atomized agent can react with the high temperature... Nitrogen oxides in the flue gas rapidly come into contact with and react with the gas. After the denitrification reaction, high-temperature gas is generated. Then, the gas pump 17 is started by the controller 2. The gas pump 17 extracts the high-temperature gas from the denitrification tower 1 and introduces it into the installation frame 11. After the high-temperature gas enters the installation frame 11, the gas first passes through the first moving box 12. The block desiccant 15 can adsorb the moisture in the gas and reduce the humidity. Then the gas enters the second moving box 13. The block activated carbon 16 will further adsorb the residual impurities and harmful gases in the gas. Then the purified high-temperature gas will enter the jacket layer 6 through the guide pipe 10 and the heat pipe 9. The heat carried by the high-temperature gas can be transferred to the chemical tank 7 in the jacket layer 6, which can preheat the denitrification agent in the chemical tank 7.
[0040] It should be noted that the specific structure, working principle and usage method of the rotary joint involved in this application are all existing technologies, and therefore are not described in detail in the text.
[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A boiler denitration agent feeding mechanism comprising a denitration tower (1), characterized in that: The front side of the surface of the denitration tower (1) is provided with a controller (2), the inside of the denitration tower (1) is provided with a rotating assembly (3), the rotating assembly (3) comprises a first bevel gear (301), the inside of the first bevel gear (301) is fixedly connected with a delivery assembly (4), the surface of the denitration tower (1) is fixedly connected with a collar (5), the inside of the collar (5) is fixedly connected with a jacket layer (6), and the inside of the jacket layer (6) is fixedly connected with a medicament tank (7). The delivery assembly (4) comprises a liquid pump (401), the liquid suction end of the liquid pump (401) extends to the inside of the medicament tank (7), the liquid outlet end of the liquid pump (401) is fixedly connected with a connecting pipe (402), the other end of the connecting pipe (402) penetrates through the denitration tower (1) and is fixedly connected with a rotating joint (403), the rotating end of the rotating joint (403) is fixedly connected with a metal shunt pipe (404), the surface of the bottom end of the metal shunt pipe (404) is fixedly connected with a branch pipe (405), the number of the branch pipe (405) is several and is distributed in a ring shape, and the bottom of the surface of the branch pipe (405) is fixedly connected with a plurality of atomizing nozzles (406).
2. The boiler denitration agent feeding mechanism according to claim 1, characterized in that: The first bevel gear (301) is fixedly sleeved on the surface of the metal shunt pipe (404), and the bottom of the first bevel gear (301) is meshedly connected with a second bevel gear (302).
3. The boiler denitration agent feeding mechanism according to claim 2, characterized in that: The left side of the second bevel gear (302) is fixedly connected with a transmission rod (303), the transmission rod (303) penetrates through the denitration tower (1) and is rotatably connected with the denitration tower (1), one end of the transmission rod (303) away from the second bevel gear (302) is fixedly connected with a driving motor (304), and the driving motor (304) is fixedly connected with the denitration tower (1).
4. The boiler denitration agent feeding mechanism according to claim 2, characterized in that: The inside of the denitration tower (1) is fixedly connected with a supporting ring (8), the middle of the top of the supporting ring (8) is fixedly connected with a protective shell (305), the metal shunt pipe (404) penetrates through the supporting ring (8) and the protective shell (305) and is rotatably connected therewith, and the first bevel gear (301) and the second bevel gear (302) are located in the inside of the protective shell (305).
5. The boiler denitration agent feeding mechanism according to claim 1, characterized in that: The bottom of the jacket layer (6) is fixedly connected with a heat pipe (9), the bottom of the heat pipe (9) is fixedly connected with a guide pipe (10), and the bottom of the guide pipe (10) is fixedly connected with a mounting frame (11).
6. The boiler denitration agent feeding mechanism according to claim 5, characterized in that: The inside of the mounting frame (11) is slidably connected with a first moving box (12) and a second moving box (13), the right side of each of the first moving box (12) and the second moving box (13) is fixedly connected with a positioning plate (14), the positioning plate (14) is hinged to the right side of the mounting frame (11), the bottom of the inner wall of each of the first moving box (12) and the second moving box (13) is provided with a metal mesh, the inside of the first moving box (12) is provided with a block-shaped drying agent (15), and the inside of the second moving box (13) is provided with a block-shaped activated carbon (16).
7. The boiler denitration agent feeding mechanism according to claim 5, characterized in that: The bottom of the mounting frame (11) is fixedly connected with an air pump (17), the air outlet end of the air pump (17) is fixedly communicated with the mounting frame (11), the air inlet end of the air pump (17) is fixedly communicated with a conduit (18), and the other end of the conduit (18) is fixedly communicated with the top of the denitration tower (1).
8. The boiler denitration agent feeding mechanism according to claim 1, characterized in that: The right side of the surface of the jacket layer (6) is fixedly communicated with an air outlet pipe (19), and the inside of the air outlet pipe (19) is provided with a control valve (20).