Optimized treatment device for denitration of power plant
By introducing structures such as mixing boxes, diversion boxes, and rotating blades into the denitrification unit of the power plant, the mixing time of ammonia and flue gas is extended, which solves the problem of incomplete reaction, improves denitrification efficiency, and prevents equipment damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN HUADIAN KEMEN POWER GENERATION CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-21
AI Technical Summary
Insufficient mixing and reaction time between ammonia and flue gas in the pipeline leads to incomplete reaction, affecting the denitrification efficiency.
A denitrification optimization treatment device for power plants was designed, including a mixing box, an ammonia diversion box, a flue gas diversion box, a rotating rod, and mixing blades. Through airflow guidance and stirring, the mixing time of ammonia and flue gas is extended. A preliminary purification box, a dust filter plate, and an arc-shaped baffle plate are set to ensure that the gas reacts fully.
It improves the mixing efficiency of ammonia and flue gas, provides sufficient reaction time, enhances the denitrification effect, prevents pipeline blockage and equipment damage, and improves the overall efficiency of denitrification.
Smart Images
Figure CN224524419U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of denitrification technology, specifically to an optimized denitrification treatment device for power plants. Background Technology
[0002] When a thermal power plant generates electricity, it burns fuel, which heats water to produce steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives the turbine to rotate, converting the heat energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy. During the fuel combustion process, a large amount of sulfur and nitrate-containing waste gas is produced from the coal used as fuel. If this waste gas is released into the atmosphere, it will cause pollution and form acid rain. In order to protect the environment, the waste gas from thermal power plants cannot be directly discharged into the air. It needs to be treated by certain equipment to meet environmentally friendly standards before it can be discharged. The desulfurization and denitrification equipment in thermal power plants is used to treat these waste gases containing large amounts of sulfur and nitrate. Most of them use ammonia reduction denitrification, where ammonia and flue gas are directly mixed and reacted to reduce the emission of sulfur and nitrate waste gas. However, currently, ammonia and flue gas are mixed through pipelines, and the mixing reaction time between ammonia and flue gas is insufficient, resulting in incomplete reaction and affecting the denitrification efficiency. Therefore, this utility model provides an optimized denitrification treatment device for power plants to meet people's needs. Utility Model Content
[0003] This invention provides an optimized denitrification treatment device for power plants, which can effectively solve the problem mentioned in the background art where the mixing reaction time between ammonia and flue gas through pipelines is insufficient, resulting in incomplete reaction and affecting the denitrification treatment efficiency.
[0004] To achieve the above objectives, this utility model provides the following technical solution: an optimized treatment device for denitrification in power plants, comprising a mixing chamber, an ammonia distribution box fixedly installed at the bottom of one side wall inside the mixing chamber, an ammonia delivery pipe fixedly connected to one end of the middle of the ammonia distribution box, and a flue gas distribution box fixedly installed in the middle of the end of the mixing chamber away from the ammonia distribution box, with air outlets equidistantly opened at one end of both the ammonia distribution box and the flue gas distribution box; A mounting frame is fixedly installed in the middle of the bottom of the mixing box. A rotating rod is rotatably installed on the top of the mounting frame. Mixing blades are fixedly installed at equal intervals along the circumferential direction on the middle surface of the rotating rod.
[0005] Preferably, the ammonia distribution box is aligned with the mixing blade located below, the flue gas distribution box is aligned with the mixing blade located above, and the ammonia delivery pipe is connected to an external ammonia supply device.
[0006] Preferably, a preliminary purification box is fixedly installed at the middle of one end of the mixing box, a dust filter plate is embedded in the middle of the preliminary purification box, positioning and fitting plates are fixedly installed on both sides of the internal side walls of the preliminary purification box and the dust filter plate, and protective inclined plates are fixedly connected to the edges of the two positioning and fitting plates away from the mixing box. An extension box is fixedly installed at the top of the preliminary purification box, and electric push rods are symmetrically fixedly installed at both ends inside the extension box. A cleaning strip is fixedly connected between the bottom ends of the two electric push rods. A flue gas conveying pipe is fixedly connected to the middle end of the preliminary purification box away from the mixing box.
[0007] Preferably, the preliminary purification box and the flue gas diversion box are connected by a pipeline, and the flue gas conveying pipe is connected to the external boiler flue gas emission pipe; The cleaning strip is in close contact with the surface of the dust filter plate, and the two protective inclined plates respectively cover one side of the two electric push rods.
[0008] Preferably, a top cover is installed at the top of the mixing chamber, and arc-shaped positioning plates are symmetrically fixedly installed at the top of both ends inside the mixing chamber. An arc-shaped flow baffle is installed between the middle of the two arc-shaped positioning plates. Pressing blocks are symmetrically fixedly connected to both ends of the bottom of the top cover, and an air outlet pipe is fixedly connected to the middle of the top of the top cover.
[0009] Preferably, the two ends of the arc-shaped flow barrier are respectively movably embedded inside the two arc-shaped positioning plates, and a gap is left between the two sides of the arc-shaped flow barrier and the two side walls of the mixing box, and the two pressing blocks are respectively pressed on the two ends of the top of the arc-shaped flow barrier.
[0010] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is scientific and reasonable, and it is safe and convenient to use. 1. Equipped with an ammonia gas diversion box, a flue gas diversion box, an outlet, a mounting frame, a rotating rod, and mixing blades, the ammonia gas diversion box and the flue gas diversion box work together to guide the flow of ammonia and flue gas. The exhaust airflow blows the mixing blades, providing a certain pushing effect, causing the rotating rod and mixing blades to rotate inside the mixing box. This stirs the ammonia and flue gas inside, and the rotation of the mixing blades causes the flue gas and ammonia to rotate around the mixing blades. This allows the flue gas to rotate downwards to the ammonia discharge position, and the ammonia to rotate upwards to the flue gas discharge position, ensuring thorough mixing of the ammonia and flue gas. Furthermore, the ammonia gas diversion box and the flue gas diversion box increase the range of ammonia and flue gas discharge, further improving the mixing efficiency and providing sufficient reaction time for the ammonia and flue gas to fully mix and react, removing sulfur and nitrate waste gas from the flue gas, thus improving the denitrification treatment effect.
[0011] 2. The system is equipped with a preliminary purification box, dust filter plate, positioning and bonding plate, protective inclined plate, electric push rod, and cleaning strip. The positioning and bonding plate secures the dust filter plate in place, fixing it in the path of flue gas flow. This filters and purifies the emitted flue gas, intercepting and removing dust particles to prevent subsequent particulate impurities from clogging pipes or damaging the processing equipment. The electric push rod and cleaning strip clean the surface of the dust filter plate, periodically removing trapped and adhered particulate impurities to prevent blockage and proper flue gas emission. The protective inclined plate protects the electric push rod, preventing internal particulate impurities from directly impacting it during flue gas flow, as prolonged impact can easily damage it.
[0012] 3. It is equipped with an arc-shaped positioning plate, an arc-shaped flow-blocking plate, and a pressing block. The arc-shaped flow-blocking plate intercepts and obstructs the flow of the mixed gas inside the mixing chamber, so that the gas can only be discharged from the gap between the arc-shaped flow-blocking plate and the inner wall of the mixing chamber. This provides sufficient time for the ammonia and flue gas to mix and react, preventing the gas from flowing upward and being discharged directly before it has fully reacted. The arc-shaped positioning plate and the pressing block position and press the arc-shaped flow-blocking plate to stabilize it, making the installation and removal of the arc-shaped flow-blocking plate extremely simple. Attached Figure Description
[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0014] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the mixing box of this utility model; Figure 3 This is a schematic diagram of the installation structure of the flue gas diversion box of this utility model; Figure 4 This is a schematic diagram of the installation structure of the cleaning strip of this utility model; Numbered in the diagram: 1. Mixing box; 2. Ammonia distribution box; 3. Ammonia delivery pipe; 4. Flue gas distribution box; 5. Gas outlet; 6. Mounting bracket; 7. Rotating rod; 8. Mixing blades; 9. Preliminary purification box; 10. Dust filter plate; 11. Positioning and bonding plate; 12. Protective inclined plate; 13. Extension box; 14. Electric push rod; 15. Cleaning strip; 16. Flue gas delivery pipe; 17. Top cover; 18. Arc-shaped positioning plate; 19. Arc-shaped flow baffle; 20. Pressing block; 21. Gas outlet pipe. Detailed Implementation
[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0016] Example: Figure 1-4 As shown, this utility model provides a technical solution, an optimized treatment device for denitrification in power plants, including a mixing box 1. An ammonia gas diversion box 2 is fixedly installed at the bottom of one side wall inside the mixing box 1. An ammonia gas delivery pipe 3 is fixedly connected to one end of the middle of the ammonia gas diversion box 2. A flue gas diversion box 4 is fixedly installed in the middle of the end of the mixing box 1 away from the ammonia gas diversion box 2. Both the ammonia gas diversion box 2 and the flue gas diversion box 4 have air outlets 5 at equal intervals at one end. A mounting bracket 6 is fixedly installed at the center of the bottom of the mixing box 1. A rotating rod 7 is rotatably mounted on the top of the mounting bracket 6. Mixing blades 8 are fixedly installed at equal intervals along the circumference on the middle surface of the rotating rod 7. The ammonia gas diversion box 2 is aligned with the mixing blades 8 located below, and the flue gas diversion box 4 is aligned with the mixing blades 8 located above. The ammonia gas delivery pipe 3 is connected to an external ammonia gas supply device. Through the combined use of the ammonia gas diversion box 2 and the flue gas diversion box 4, the delivered ammonia gas and the flue gas emission are guided. The exhaust airflow blows the mixing blades 8, providing a certain pushing effect, so that the rotating rod 7 and the mixing blades 8 are mixed... The internal rotation of the mixing chamber 1 agitates the ammonia and flue gas inside. The rotation of the mixing blades 8 also generates a certain amount of swirling airflow, causing the flue gas and ammonia to swirl around the mixing blades 8. This allows the flue gas to rotate downwards to the ammonia emission point, while the ammonia rotates upwards to the flue gas emission point, ensuring thorough mixing of the ammonia and flue gas. Furthermore, the ammonia distribution chamber 2 and the flue gas distribution chamber 4 increase the emission range of ammonia and flue gas, further improving the mixing efficiency. This provides sufficient reaction time for the ammonia and flue gas to fully mix and react, removing sulfur and nitrate waste gas from the flue gas, thus improving the denitrification treatment effect. A preliminary purification box 9 is fixedly installed at the middle of one end of the mixing box 1. A dust filter plate 10 is embedded in the middle of the preliminary purification box 9. Positioning and bonding plates 11 are fixedly installed on both sides of the internal side walls of the preliminary purification box 9 and on both sides of the dust filter plate 10. Protective inclined plates 12 are fixedly connected to the edges of the two positioning and bonding plates 11 away from the mixing box 1. An extension box 13 is fixedly installed at the top of the preliminary purification box 9. Electric push rods 14 are symmetrically fixedly installed at both ends inside the extension box 13. A cleaning strip 15 is fixedly connected between the bottom ends of the two electric push rods 14. A flue gas conveying pipe 16 is fixedly connected to the middle end of the preliminary purification box 9 away from the mixing box 1. The preliminary purification box 9 and the flue gas diversion box 4 are connected by a pipe. The flue gas conveying pipe 16 is connected to the external boiler flue gas discharge pipe. The cleaning strip 15 is tightly attached to the filter plate. On the surface of the dust filter plate 10, two protective inclined plates 12 cover one side of the two electric push rods 14 respectively. The positioning and bonding plate 11 plays a role in positioning and stabilizing the dust filter plate 10, fixing it in the path of flue gas flow, and filtering and purifying the emitted flue gas. It intercepts and removes dust particles in the flue gas, preventing subsequent particulate impurities from causing pipeline blockage or damage to the processing equipment. At the same time, the electric push rods 14 and cleaning strips 15 can be used to clean the surface of the dust filter plate 10, regularly removing the intercepted and adhered particulate impurities, preventing particulate impurities from clogging the dust filter plate 10 and causing the flue gas to be unable to be discharged normally. The protective inclined plates 12 protect the electric push rods 14, preventing the particulate impurities inside from directly hitting the electric push rods 14 when the flue gas is discharged, as long-term collisions can easily cause damage to them. A top cover 17 is installed at the top of the mixing chamber 1. Arc-shaped positioning plates 18 are symmetrically fixedly installed at the top of both ends inside the mixing chamber 1. An arc-shaped baffle plate 19 is installed between the middle of the two arc-shaped positioning plates 18. Pressing blocks 20 are symmetrically fixedly connected to both ends of the bottom of the top cover 17. An air outlet pipe 21 is fixedly connected to the middle of the top of the top cover 17. The two ends of the arc-shaped baffle plate 19 are respectively movably embedded inside the two arc-shaped positioning plates 18. A gap is left between the two sides of the arc-shaped baffle plate 19 and the two side walls of the mixing chamber 1. The two pressing blocks... The two ends of the arc-shaped baffle plate 19 are pressed down respectively. The arc-shaped baffle plate 19 intercepts and blocks the flow of the mixed gas inside the mixing box 1, so that the gas can only be discharged from the gap between the arc-shaped baffle plate 19 and the inner wall of the mixing box 1. This provides enough time for the ammonia and flue gas to mix and react, and prevents the gas from flowing upward and being discharged directly before it has fully reacted. The arc-shaped positioning plate 18 and the pressing block 20 play a role in positioning and pressing the arc-shaped baffle plate 19 to stabilize it, making the installation and disassembly of the arc-shaped baffle plate 19 extremely simple.
[0017] The working principle and usage process of this utility model are as follows: First, the flue gas generated by the boiler enters the interior of the preliminary purification box 9 through the flue gas conveying pipe 16. When the flue gas passes through the dust filter plate 10, the particulate impurities inside the flue gas will be intercepted by the dust filter plate 10, which plays a preliminary purification role on the flue gas. When the flue gas is discharged, the protective inclined plate 12 covers and protects the electric push rod 14 to prevent the particles in the flue gas from being directly blown and hitting the electric push rod 14. The filtered flue gas is conveyed to the interior of the flue gas diversion box 4, and then blown to the mixing blade 8 located above through the air outlet 5. At the same time, the ammonia gas delivered from the outside enters the ammonia diversion box 2 from the ammonia gas conveying pipe 3, and then blown to the mixing blade 8 located below through the air outlet 5. The mixing blade 8 is blown by airflow from both above and below, and is located in two directions respectively, so that the mixing blade 8 and the rotating rod 7 rotate synchronously. When the mixing blade 8 rotates, it causes the airflow inside the mixing chamber 1 to rotate, which guides the continuously emitted ammonia and flue gas. This causes the ammonia and flue gas to rotate with the airflow, and the flue gas emitted from the top rotates downward with the airflow to one side of the ammonia distribution chamber 2, where it can fully contact and react with the ammonia emitted from inside the ammonia distribution chamber 2. Meanwhile, the ammonia rotates upward with the airflow to one side of the flue gas distribution chamber 4, where it can also fully contact and react with the emitted flue gas. At the same time, the arc-shaped baffle 19 above acts as a gas flow barrier, preventing the gas from rising directly and being discharged. The arc surface at its bottom promotes the guidance of the rotating airflow, providing sufficient space for the ammonia and flue gas to fully mix and react. After the ammonia and flue gas have fully reacted, the mixed gas will be discharged upward from the gap between the two sides of the arc-shaped baffle 19 and the two side walls of the mixing chamber 1, and then discharged from the outlet pipe 21 to the next processing step. This effectively increases the residence and mixing time of ammonia and flue gas inside the mixing chamber 1, thereby increasing the reaction time and improving the denitrification efficiency. The dust filter plate 10 continuously filters the flue gas, and the intercepted particulate impurities will continue to accumulate and adhere to its surface. The electric push rod 14 is periodically controlled to pull the cleaning strip 15 up and down along the surface of the dust filter plate 10 to remove the adhered particles, so that the flue gas can pass normally.
[0018] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An optimized treatment device for denitrification in power plants, comprising a mixing tank (1), characterized in that: An ammonia distribution box (2) is fixedly installed at the bottom of one side wall inside the mixing box (1). An ammonia delivery pipe (3) is fixedly connected to one end of the middle of the ammonia distribution box (2). A flue gas distribution box (4) is fixedly installed in the middle of the end of the mixing box (1) away from the ammonia distribution box (2). Both the ammonia distribution box (2) and the flue gas distribution box (4) have air outlets (5) at equal intervals at one end. A mounting frame (6) is fixedly installed in the middle of the bottom of the mixing box (1). A rotating rod (7) is rotatably installed on the top of the mounting frame (6). Mixing blades (8) are fixedly installed at equal intervals along the circumferential direction on the middle surface of the rotating rod (7).
2. The optimized denitrification treatment device for power plants according to claim 1, characterized in that, The ammonia distribution box (2) is aligned with the mixing blade (8) located below, the flue gas distribution box (4) is aligned with the mixing blade (8) located above, and the ammonia delivery pipe (3) is connected to an external ammonia supply device.
3. The optimized denitrification treatment device for power plants according to claim 1, characterized in that, A preliminary purification box (9) is fixedly installed at the middle of one end of the mixing box (1). A dust filter plate (10) is embedded in the middle of the preliminary purification box (9). Positioning and bonding plates (11) are fixedly installed on both sides of the two internal side walls of the preliminary purification box (9) and the two sides of the dust filter plate (10). Protective inclined plates (12) are fixedly connected to the edges of the two positioning and bonding plates (11) away from the mixing box (1). An extension box (13) is fixedly installed at the top of the preliminary purification box (9). Electric push rods (14) are symmetrically fixedly installed at both ends inside the extension box (13). A cleaning strip (15) is fixedly connected between the bottom ends of the two electric push rods (14). A flue gas conveying pipe (16) is fixedly connected to the middle end of the preliminary purification box (9) away from the mixing box (1).
4. The optimized denitrification treatment device for power plants according to claim 3, characterized in that, The preliminary purification box (9) and the flue gas diversion box (4) are connected by a pipe, and the flue gas conveying pipe (16) is connected to the external boiler flue gas discharge pipe; The cleaning strip (15) is in close contact with the surface of the dust filter plate (10), and the two protective inclined plates (12) respectively cover one side of the two electric push rods (14).
5. The optimized denitrification treatment device for power plants according to claim 1, characterized in that, The mixing box (1) is equipped with a top cover (17) at the top. Arc-shaped positioning plates (18) are symmetrically fixedly installed at the top of both ends inside the mixing box (1). An arc-shaped baffle plate (19) is installed between the middle of the two arc-shaped positioning plates (18). Pressing blocks (20) are symmetrically fixedly connected at both ends of the bottom of the top cover (17). An air outlet pipe (21) is fixedly connected at the middle of the top of the top cover (17).
6. The optimized denitrification treatment device for power plants according to claim 5, characterized in that, The two ends of the arc-shaped baffle plate (19) are respectively movably embedded inside the two arc-shaped positioning plates (18). There is a gap between the two sides of the arc-shaped baffle plate (19) and the two side walls of the mixing box (1). The two pressing blocks (20) are respectively pressed on the two ends of the top of the arc-shaped baffle plate (19).