A high-efficiency SNCR denitrification device for waste incinerators

Abstract

This utility model discloses a high-efficiency SNCR denitrification device for a waste incinerator, including a reactor body. The reactor body has flue gas channels at both ends, with an inlet and an outlet at each end. A fixed frame is mounted on the top of the reactor body, and a spray assembly is mounted on the fixed frame. The spray assembly includes a mounting plate, a drive source, an output shaft, a moving guide rail, a support plate, spray pipes, and multiple sets of symmetrically arranged spray heads. The output shaft is connected to a deflection plate, which is connected to a connecting rod. A contact wheel is rotatably mounted on the connecting rod, and the contact wheel can contact one side of the support plate. The drive source drives the deflection plate to rotate, which in turn pushes the support plate along the moving guide rail via the contact wheel, causing the spray heads to move and spray in the area above the furnace, improving the uniformity and utilization rate of the denitrification agent coverage.

Description

Technical Field

[0001] This utility model relates to the field of SNCR denitrification technology for waste incinerators, specifically to a high-efficiency SNCR denitrification device for waste incinerators. Background Technology

[0002] With the widespread application of waste incineration technology, waste incinerators generate a large amount of flue gas containing nitrogen oxides (NOx) while burning waste at high temperatures, causing serious environmental pollution. Selective non-catalytic reduction (SNCR) is a common flue gas denitrification technology. Due to its simple process, low investment cost, and strong applicability, it is widely used in waste incinerators. In the SNCR denitrification process, reducing agents such as ammonia and urea need to be injected into the furnace within a suitable temperature range to react with NOx and generate harmless nitrogen. During the operation of the waste incinerator, the denitrification process takes place after incineration, while the flue gas is still at a high temperature.

[0003] Most existing spray structures are fixed and have a limited spray range, making it difficult to fully cover the target reaction area inside the furnace, resulting in low utilization of reducing agent and unstable denitrification efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a high-efficiency SNCR denitrification device for waste incinerators, in order to solve the problem mentioned in the background art that most of the existing spray structures adopt a fixed arrangement, which has a limited spray range and makes it difficult to fully cover the target reaction area inside the furnace, resulting in low utilization rate of reducing agent and unstable denitrification efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency SNCR denitrification device for a waste incinerator, comprising a reactor body, flue gas channels at both ends of the reactor body, a flue gas inlet at one end of the flue gas channel, a flue gas outlet at the other end of the flue gas channel, a fixing frame at the top of the reactor body, and a spraying assembly on the fixing frame; the spraying assembly is used to spray the reactor body.

[0006] Preferably, the spray assembly includes a mounting plate disposed on the fixed frame, a drive source disposed on the mounting plate, an output shaft disposed at one end of the 8, one end of the output shaft passing through the mounting plate, movable guide rails disposed at both ends of the fixed frame, a set of support plates disposed inside the fixed frame, a spray pipe disposed on the support plate, a plurality of spray heads disposed on the spray pipe, a pipe connected to one end of the spray pipe, and the spray heads being symmetrically arranged.

[0007] Preferably, one end of the movable guide rail is disposed on the inner wall of the reactor body, and a set of guide plates are disposed on the movable guide rail, the guide plates being arc-shaped and bent to one side.

[0008] Preferably, the movable guide rail is provided with a movable wheel, one end of the movable wheel is provided with a connecting plate, and one end of the connecting plate is provided on the support plate.

[0009] Preferably, a deflection plate is provided at one end of the output shaft, a connecting rod is provided at one end of the deflection plate, and a contact wheel is rotatably sleeved on the connecting rod, the contact wheel being able to contact one side of the support plate.

[0010] Preferably, a sealing door is provided on one side of the reactor body, the sealing door can be opened, and a discharge port is provided at the bottom of the reactor body.

[0011] Preferably, both the spray pipe and the spray head are made of high-temperature resistant metal.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the SNCR denitrification device for waste incinerator not only solves the problem of limited spray range and difficulty in fully covering the target reaction area inside the furnace, resulting in low utilization rate of reducing agent and unstable denitrification efficiency, but also improves the SNCR denitrification reaction efficiency and effectively reduces the emission of nitrogen oxides in flue gas.

[0013] By installing a spray assembly at the top of the reactor body, ammonia water or other reducing agents are sprayed into the reactor body. These agents react with nitrogen oxides in the flue gas within a suitable temperature range, thus achieving denitrification. The flue gas enters the reactor through the inlet, flows through the denitrification zone via the flue gas channel, and exits through the outlet. The spray assembly is mounted on a fixed frame for easy nozzle arrangement and adjustment. An openable sealed door is located on one side of the reactor body for internal inspection and maintenance. The bottom outlet is used to handle solid residues after incineration, ensuring continuous and efficient operation of the entire system. The precise addition of denitrifying agents within the reactor body using the top spray assembly improves the efficiency of the SNCR denitrification reaction, effectively reducing nitrogen oxide emissions in the flue gas and meeting environmental protection requirements. The spray assembly, mounted on a fixed frame, is securely installed and easy to maintain. The evenly distributed nozzles help improve the utilization rate of the reducing agent. The sealed door facilitates inspection and observation, enhancing operational safety and convenience. The bottom outlet facilitates slag handling, improving the overall system efficiency and automation.

[0014] The drive source rotates the deflection plate via the output shaft. The deflection plate is connected to the connecting rod, and a contact wheel is rotatably mounted on the connecting rod. The contact wheel contacts one side of the support plate, and the rotation deflection pushes the support plate, thereby moving the support plate along the movable guide rail inside the fixed frame. This allows the spray head to perform reciprocating spraying operations in the area above the furnace, realizing the movable spraying of the spray assembly in the top area of ​​the furnace, improving the uniformity of denitrification agent coverage and utilization efficiency. Spray pipes are installed on the support plate, and multiple sets of spray heads are symmetrically arranged on the spray pipes. The symmetrical arrangement of the spray heads ensures a reasonable spray distribution, avoiding the problem of uneven local spraying. Both the spray pipes and spray heads are made of high-temperature resistant metal materials, suitable for long-term operation in high-temperature environments, improving the reliability and service life of the system. The movable guide rail and movable wheel ensure stable operation and convenient maintenance of the spray system. The overall structure is reasonable, effectively improving the efficiency of SNCR denitrification and the automation level of the equipment during waste incineration.

[0015] When the drive source moves the support plate, the support plate moves along the curved trajectory of the guide plate within the moving guide rail. The guide plate adopts a curved arc structure design, which can effectively guide the support plate to run along a non-linear trajectory, so that the spray area of ​​the spray head can cover a wider range. This helps the denitrification agent to be more evenly distributed inside the reactor body, improving the sufficiency and efficiency of the denitrification reaction. At the same time, the guide plate and the moving guide rail work together to improve the movement stability of the spray assembly, reduce operating deviation, and enhance the durability and operational reliability of the device in high-temperature environments. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the spray assembly of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the movable guide rail of this utility model;

[0020] Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle.

[0021] In the diagram: 1. Reactor body; 2. Flue gas passage; 3. Flue gas inlet; 4. Flue gas outlet; 5. Sealing door; 6. Fixing frame; 7. Mounting plate; 8. Drive source; 9. Output shaft; 10. Moving guide rail; 11. Spray pipe; 12. Spray head; 13. Guide plate; 14. Moving wheel; 15. Connecting plate; 16. Support plate; 17. Deflection plate; 18. Connecting rod; 19. Contact wheel. Detailed Implementation

[0022] 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.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Example 1

[0026] Please see Figure 1-5 This utility model provides an embodiment of a high-efficiency SNCR denitrification device for a waste incinerator, comprising a reactor body 1, flue gas channels 2 at both ends of the reactor body 1, a flue gas inlet 3 at one end of the flue gas channel 2, a flue gas outlet 4 at the other end of the flue gas channel 2, a fixing frame 6 at the top of the reactor body 1, and a spray assembly on the fixing frame 6; the spray assembly is used to spray the inside of the reactor body 1; a sealing door 5 is provided on one side of the reactor body 1, the sealing door 5 can be opened, and a discharge port is provided at the bottom of the reactor body 1;

[0027] A spray assembly is installed at the top of the reactor body 1 to spray ammonia water or other reducing agents into the reactor body 1. These agents react with nitrogen oxides in the flue gas within a suitable temperature range, thus achieving denitrification. The flue gas enters the reactor through the inlet 3, flows through the denitrification zone via the flue gas channel 2, and exits through the outlet 4. The spray assembly is mounted on a fixed frame 6 for easy nozzle arrangement and adjustment. An openable sealed door 5 is provided on one side of the reactor body 1 for internal inspection and maintenance. The bottom outlet is used to process solid residues after incineration, ensuring continuous and efficient operation of the entire system. The top spray assembly allows for precise addition of denitrifying agents within the reactor body 1, improving the efficiency of the SNCR denitrification reaction and effectively reducing nitrogen oxide emissions in the flue gas, meeting environmental protection requirements. The spray assembly, mounted on the fixed frame 6, is securely installed and easy to maintain. The evenly distributed nozzles help improve the utilization rate of the reducing agent. The sealed door 5 facilitates inspection and observation, enhancing operational safety and convenience. The bottom outlet facilitates slag processing, improving the overall system efficiency and automation.

[0028] The spray assembly includes a mounting plate 7 mounted on a fixed frame 6, a drive source 8 mounted on the mounting plate 7, an output shaft 9 mounted at one end of the 8, and one end of the output shaft 9 passing through the mounting plate 7. Moving guide rails 10 are mounted at both ends of the fixed frame 6. A set of support plates 16 is mounted inside the fixed frame 6, and a spray pipe 11 is mounted on the support plate 16. Multiple spray heads 12 are mounted on the spray pipe 11, one end of which is connected to a pipe. The spray heads 12 are symmetrically arranged. Moving wheels 14 are mounted inside the moving guide rails 10, and a connecting plate 15 is mounted at one end of each moving wheel 14. One end of the connecting plate 15 is mounted on the support plate 16. A deflection plate 17 is mounted at one end of the output shaft 9, and a connecting rod 18 is mounted at one end of the deflection plate 17. A contact wheel 19 is rotatably mounted on the connecting rod 18, and the contact wheel 19 can contact one side of the support plate 16. Both the spray pipe 11 and the spray heads 12 are made of high-temperature resistant metal.

[0029] The drive source 8 drives the deflection plate 17 to rotate via the output shaft 9. The deflection plate 17 is connected to the connecting rod 18, and a contact wheel 19 is rotatably sleeved on the connecting rod 18. The contact wheel 19 contacts one side of the support plate 16. By rotating and deflecting, the support plate 16 is pushed, thereby driving the support plate 16 to move along the moving guide rail 10 inside the fixed frame 6. This allows the spray head 12 to perform reciprocating spraying operations in the area above the furnace, realizing the moving spraying of the spray assembly in the top area of ​​the furnace, improving the uniformity of the denitrification agent coverage and utilization efficiency, and supporting... Spray pipes 11 are installed on plate 16, and multiple sets of spray heads 12 are symmetrically arranged on spray pipes 11. The symmetrical arrangement of spray heads 12 ensures reasonable spray distribution and avoids uneven local spraying. Both spray pipes 11 and spray heads 12 are made of high-temperature resistant metal materials, which are suitable for long-term operation in high-temperature environments, thereby improving the reliability and service life of the system. The movable guide rail 10 and movable wheels 14 make the spray system run smoothly and be easy to maintain. The overall structure is reasonable and effectively improves the efficiency of SNCR denitrification and the automation level of the equipment during waste incineration.

[0030] One end of the movable guide rail 10 is set on the inner wall of the reactor body 1. A set of guide plates 13 are provided on the movable guide rail 10. The guide plates 13 are in the shape of an arc that bends to one side.

[0031] When the drive source 8 moves the support plate 16, the support plate 16 moves along the curved trajectory of the guide plate 13 within the moving guide rail 10. The guide plate 13 adopts a curved arc structure design, which can effectively guide the support plate 16 to run along a non-linear trajectory, so that the spray area of ​​the spray head 12 covers a wider range, which helps the denitrification agent to be more evenly distributed inside the reactor body 1, improving the sufficiency and efficiency of the denitrification reaction. At the same time, the guide plate 13 and the moving guide rail 10 work together to improve the movement stability of the spray assembly, reduce operating deviation, and enhance the durability and operational reliability of the device in high-temperature environments.

[0032] Work steps

[0033] In use, the device drives the output shaft 9 to rotate via the drive source 8. The deflection plate 17 on the output shaft 9 is linked to the connecting rod 18 and the contact wheel 19, pushing the support plate 16 to move along the moving guide rail 10 within the fixed frame 6, thereby realizing the reciprocating spraying operation of the spray assembly. The spray pipe 11 on the support plate 16 cooperates with multiple symmetrically arranged spray heads 12 to evenly spray the denitrification agent into the flue gas area inside the reactor body 1. The moving guide rail 10 is fixed to the inner wall of the reactor body 1 and is provided with a set of guide plates 13 that bend to one side to further guide the support plate 16 to run along an arc trajectory, expanding the spray coverage area and enhancing the denitrification efficiency and spray uniformity. The overall structure realizes the stable movement and efficient spraying of the spray assembly through mechanical linkage and trajectory guidance.

[0034] The above description is only a preferred embodiment of the present utility model and is 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 high-efficiency SNCR denitrification device for a waste incinerator, characterized in that: The reactor includes a reactor body, with flue gas channels at both ends. One end of each flue gas channel has a flue gas inlet, and the other end has a flue gas outlet. A mounting frame is mounted on the top of the reactor body, and a spray assembly is mounted on the mounting frame. The spray assembly is used to spray the reactor body. The spray assembly includes a mounting plate mounted on the mounting frame, a drive source mounted on the mounting plate, an output shaft at one end of the drive source, and one end of the output shaft passing through the mounting plate. The fixed frame has movable guide rails at both ends. A set of support plates is installed inside the fixed frame. Spray pipes are installed on the support plates. Multiple sets of spray heads are installed on the spray pipes. One end of the spray pipe is connected to a pipe. The spray heads are symmetrically arranged. A deflection plate is installed at one end of the output shaft. A connecting rod is installed at one end of the deflection plate. A contact wheel is rotatably sleeved on the connecting rod. The contact wheel can contact one side of the support plate. The support plate can move along the movable guide rails to drive the spray pipes and spray heads to move and spray.

2. The high-efficiency SNCR denitrification device for a waste incinerator according to claim 1, characterized in that: One end of the movable guide rail is disposed on the inner wall of the reactor body, and a set of guide plates are disposed on the movable guide rail, the guide plates being arc-shaped and bent to one side.

3. The high-efficiency SNCR denitrification device for a waste incinerator according to claim 2, characterized in that: The movable guide rail is equipped with a movable wheel, one end of which is equipped with a connecting plate, and one end of the connecting plate is mounted on the support plate.

4. The high-efficiency SNCR denitrification device for a waste incinerator according to claim 1, characterized in that: A sealing door is provided on one side of the reactor body, and the sealing door can be opened. A discharge port is provided at the bottom of the reactor body.

5. The high-efficiency SNCR denitrification device for a waste incinerator according to claim 1, characterized in that: Both the spray pipe and the spray head are made of high-temperature resistant metal.

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