A urea solution denitrification reaction device based on high-temperature flue gas pyrolysis

Abstract

This utility model relates to the technical field of high-temperature flue gas pyrolysis, and in particular to a urea solution denitrification reaction device based on high-temperature flue gas pyrolysis. The device includes a main body for the urea solution denitrification reaction, with a stirring mechanism on the outer surface and a cleaning mechanism on the inner surface. In operation, the first motor drives a fixed rod to rotate, which in turn drives a stirring impeller and a connecting rod to rotate. The rotating connecting rod then drives a stirring tube to stir the urea solution, preventing crystallization. The impeller design enhances the stirring effect and improves reaction efficiency. Furthermore, the addition of the stirring tube increases the stirring area and ensures more thorough stirring, further preventing urea solution deposition and crystallization, thus extending the device's service life.

Description

Technical Field

[0001] This utility model relates to the technical field of high-temperature flue gas pyrolysis, and in particular to a urea solution denitrification reaction device based on high-temperature flue gas pyrolysis. Background Technology

[0002] High-temperature flue gas pyrolysis is a technology that utilizes high temperatures to induce a chemical reaction between nitrogen oxides in flue gas and urea solution. In this process, high-temperature flue gas is introduced into the reaction device, while the urea solution is sprayed in atomized form. The high temperature causes the urea to rapidly pyrolyze, producing active components such as ammonia. These active components then undergo a reduction reaction with the nitrogen oxides in the flue gas, generating nitrogen and water, thereby achieving denitrification. This technology has advantages such as high efficiency and environmental friendliness, effectively reducing nitrogen oxide emissions from flue gas and meeting increasingly stringent environmental requirements. To improve denitrification efficiency and the stability of the reaction device, a urea solution denitrification reaction device based on high-temperature flue gas pyrolysis is particularly needed.

[0003] Because existing urea solution denitrification reactors often suffer from urea solution crystallization and deposition during operation, this not only affects denitrification efficiency but may also lead to clogging and damage to the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a urea solution denitrification reaction device based on high-temperature flue gas pyrolysis to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a urea solution denitrification reaction device based on high-temperature flue gas pyrolysis, comprising a urea solution denitrification reaction device body, wherein a stirring mechanism is provided on the outer surface of the urea solution denitrification reaction device body, and a cleaning mechanism is provided on the inner surface of the urea solution denitrification reaction device body.

[0006] The stirring mechanism includes a first motor, a fixed rod, a stirring impeller, a connecting rod, and a stirring tube. The first motor is installed on the upper surface of the main body of the urea solution denitrification reaction device. The output end of the first motor is connected to the fixed rod. One end of the fixed rod is fixedly connected to the stirring impeller. The outer surface of the fixed rod is fixedly connected to the connecting rod, and one end of the connecting rod is connected to the stirring tube.

[0007] Preferably, the cleaning mechanism includes a feeding pipe, a conveying pipe, an observation window, a discharge pipe, a second motor, a screw shaft, and a collection box. The bottom wall of the urea solution denitrification reaction device is connected to the feeding pipe, one end of the feeding pipe is connected to the conveying pipe, an observation window is opened on the outer surface of the conveying pipe, one end of the conveying pipe is connected to the discharge pipe, a second motor is provided at one end of the conveying pipe, the output end of the second motor is connected to the screw shaft, and a collection box is provided below the discharge pipe.

[0008] Preferably, the main body of the urea solution denitrification reaction device includes a base, supporting legs, a reaction chamber, a flue pipe, a solution pipe, a water pump, and a urea solution storage tank. The supporting legs are provided on the upper surface of the base, and the reaction chamber is fixedly connected to the upper surface of the supporting legs. The flue pipe is connected to the upper surface of the reaction chamber, and the solution pipe is connected to the outer surface of the reaction chamber. One end of the solution pipe is connected to the water pump, and the input end of the water pump is connected to the urea solution storage tank.

[0009] Preferably, the first motor and the fixed rod form a rotating structure, and connecting rods are evenly distributed on the outer surface of the fixed rod.

[0010] Preferably, the connecting rods are arranged symmetrically about the central axis of the length of the fixed rods, and the stirring impellers are arranged in a ring array.

[0011] Preferably, the second motor and the screw shaft form a rotating structure, and the outer surface of the screw shaft matches the inner surface of the conveying pipe.

[0012] Preferably, one end of the spiral shaft is positioned below the main body of the urea solution denitrification reaction device, and the other end of the spiral shaft is positioned above the collection tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This urea solution denitrification reaction device based on high-temperature flue gas pyrolysis, through the arrangement of a first motor, a fixed rod, a stirring impeller, a connecting rod, and a stirring tube, allows the first motor to start and drive the fixed rod to rotate during use. The rotation of the fixed rod drives the stirring impeller and the connecting rod to rotate, and the rotation of the connecting rod drives the stirring tube to stir the urea solution, preventing crystallization of the urea solution. At the same time, the design of the stirring impeller can enhance the stirring effect and improve the reaction efficiency. In addition, the addition of the stirring tube not only increases the stirring area but also makes the stirring more thorough, further avoiding the deposition and crystallization of the urea solution, thereby extending the service life of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall appearance and structure of the present utility model;

[0015] Figure 2 This is a schematic diagram of the stirring mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the cleaning mechanism structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the disassembly structure of the cleaning mechanism of this utility model.

[0018] In the diagram: 1. Main body of the urea solution denitrification reaction device; 11. Base; 12. Support leg; 13. Reaction chamber; 14. Flue gas conveying pipe; 15. Solution pipe; 16. Water pump; 17. Urea solution storage tank; 2. Stirring mechanism; 21. First motor; 22. Fixing rod; 23. Stirring impeller; 24. Connecting rod; 25. Stirring tube; 3. Cleaning mechanism; 31. Feeding pipe; 32. Conveying pipe; 33. Observation window; 34. Discharge pipe; 35. Second motor; 36. Screw shaft; 37. Collection box. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a urea solution denitrification reaction device based on high temperature flue gas pyrolysis, including a urea solution denitrification reaction device body 1, a stirring mechanism 2 is provided on the outer surface of the urea solution denitrification reaction device body 1, and a cleaning mechanism 3 is provided on the inner surface of the urea solution denitrification reaction device body 1.

[0021] The stirring mechanism 2 includes a first motor 21, a fixed rod 22, a stirring impeller 23, a connecting rod 24, and a stirring tube 25. The first motor 21 is mounted on the upper surface of the main body 1 of the urea solution denitrification reaction device. The output end of the first motor 21 is connected to the fixed rod 22. One end of the fixed rod 22 is fixedly connected to the stirring impeller 23. The outer surface of the fixed rod 22 is fixedly connected to the connecting rod 24. One end of the connecting rod 24 is connected to the stirring tube 25. With the arrangement of the first motor 21, fixed rod 22, stirring impeller 23, connecting rod 24, and stirring tube 25, during operation, the first motor 21 starts and drives the fixed rod 22 to rotate. The rotation of the fixed rod 22 drives the stirring impeller 23 and the connecting rod 24 to rotate. The rotation of the connecting rod 24 drives the stirring tube 25 to stir the urea solution, preventing crystallization of the urea solution. At the same time, the design of the stirring impeller 23 can enhance the stirring effect and improve the reaction efficiency. In addition, the addition of the stirring tube 25 not only increases the stirring area but also makes the stirring more thorough, further avoiding the deposition and crystallization of the urea solution, thereby extending the service life of the device.

[0022] Furthermore, the cleaning mechanism 3 includes a conveying pipe 31, a conveying pipe 32, an observation window 33, a discharge pipe 34, a second motor 35, a screw shaft 36, and a collection box 37. The bottom wall of the urea solution denitrification reaction device body 1 is connected to the conveying pipe 31. One end of the conveying pipe 31 is connected to the conveying pipe 32. An observation window 33 is opened on the outer surface of the conveying pipe 32. One end of the conveying pipe 32 is connected to the discharge pipe 34. A second motor 35 is installed at one end of the conveying pipe 32. The output end of the second motor 35 is connected to the screw shaft 36. A collection box 37 is installed below the discharge pipe 34. The system utilizes the conveying pipe 31, conveying pipe 32, observation window 33, discharge pipe 34, second motor 35, screw shaft 36, and collection box 37 to... In operation, the second motor 35 starts and drives the spiral shaft 36 to rotate. The rotating spiral shaft 36 pushes the residue inside the main body 1 of the urea solution denitrification reactor. The cleaning process of the residue can be directly observed through the observation window 33, ensuring that the residue is completely discharged. The spiral shaft 36 pushes the residue to the discharge pipe 34, and finally it falls into the collection box 37 for centralized treatment, avoiding environmental pollution. At the same time, the design of this cleaning mechanism 3 simplifies the cleaning steps, improves cleaning efficiency, reduces manual labor intensity, ensures the cleanliness of the inside of the main body 1 of the urea solution denitrification reactor, prevents the accumulation of residue, and thus ensures the smooth progress and efficiency of the denitrification reaction.

[0023] Furthermore, the main body 1 of the urea solution denitrification reaction device includes a base 11, a support foot 12, a reaction chamber 13, a flue pipe 14, a solution pipe 15, a water pump 16, and a urea solution storage tank 17. The support foot 12 is provided on the upper surface of the base 11, and the reaction chamber 13 is fixedly connected to the upper surface of the support foot 12. The flue pipe 14 is connected to the upper surface of the reaction chamber 13, and the solution pipe 15 is connected to the outer surface of the reaction chamber 13. One end of the solution pipe 15 is connected to the water pump 16, and the input end of the water pump 16 is connected to the urea solution storage tank 17.

[0024] Furthermore, the first motor 21 and the fixed rod 22 form a rotating structure. Connecting rods 24 are evenly distributed on the outer surface of the fixed rod 22. The first motor 21 can drive the fixed rod 22 to rotate stably, while the evenly distributed connecting rods 24 on the outer surface of the fixed rod 22 ensure the uniformity of stirring, so that the urea solution can be fully mixed in the reaction chamber 13, which further improves the reaction efficiency. In addition, this evenly spaced design also helps to reduce dead corners during the stirring process, avoid local deposition and crystallization of urea solution, and thus ensure the long-term stable operation of the device.

[0025] Furthermore, the connecting rod 24 is symmetrically arranged with respect to the length of the fixed rod 22, and the stirring impeller 23 is arranged in a ring array. The arrangement of the connecting rod 24 enables the stirring tube 25 to maintain balance during rotation, avoiding vibration and noise caused by eccentricity, and improving the stability and durability of the stirring mechanism 2.

[0026] Furthermore, the second motor 35 and the spiral shaft 36 form a rotating structure. The outer surface of the spiral shaft 36 matches the inner surface of the conveying pipe 32. With the second motor 35, the spiral shaft 36 can be driven to rotate stably inside the conveying pipe 32. The outer surface of the spiral shaft 36 and the inner surface of the conveying pipe 32 are in close contact. This design not only enhances the effect of pushing the residue, but also reduces leakage problems during the cleaning process, ensuring that the residue can be pushed smoothly and completely to the discharge pipe 34, further improving the reliability and practicality of the cleaning mechanism 3.

[0027] Furthermore, one end of the spiral shaft 36 is positioned below the main body 1 of the urea solution denitrification reaction device, and the other end of the spiral shaft 36 is positioned above the collection box 37. Through the arrangement of the spiral shaft 36, the residue inside the main body 1 of the urea solution denitrification reaction device can be effectively pushed into the collection box 37, avoiding the accumulation of residue inside the device and ensuring the cleanliness of the device and the smooth progress of the denitrification reaction.

[0028] Working Principle: In actual operation, the first motor 21 starts and drives the fixed rod 22 to rotate. The rotation of the fixed rod 22 drives the stirring impeller 23 and the connecting rod 24 to rotate. The rotation of the connecting rod 24 drives the stirring tube 25 to stir the urea solution, preventing crystallization. At the same time, the design of the stirring impeller 23 enhances the stirring effect and improves the reaction efficiency. In addition, the addition of the stirring tube 25 not only increases the stirring area but also makes the stirring more thorough, further avoiding the deposition and crystallization of the urea solution, thereby extending the service life of the device. Through the setting of the cleaning mechanism 3, during use, the second motor 35 starts and drives the spiral shaft. The spiral shaft 36 rotates to push the residue inside the main body 1 of the urea solution denitrification reactor. The cleaning process can be directly observed through the observation window 33, ensuring that the residue is completely discharged. The spiral shaft 36 pushes the residue to the discharge pipe 34, and finally it falls into the collection box 37 for centralized treatment, avoiding environmental pollution. At the same time, the design of this cleaning mechanism 3 simplifies the cleaning steps, improves cleaning efficiency, reduces manual labor intensity, ensures the cleanliness inside the main body 1 of the urea solution denitrification reactor, prevents residue accumulation, and thus ensures the smooth progress and efficiency of the denitrification reaction.

[0029] 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. A urea solution denitration reaction device based on high-temperature flue gas pyrolysis, comprising a urea solution denitration reaction device main body (1), characterized in that: A stirring mechanism (2) is provided on the outer surface of the main body (1) of the urea solution denitrification reactor, and a cleaning mechanism (3) is provided on the inner surface of the main body (1) of the urea solution denitrification reactor. The stirring mechanism (2) includes a first motor (21), a fixed rod (22), a stirring impeller (23), a connecting rod (24), and a stirring tube (25). The first motor (21) is provided on the upper surface of the main body (1) of the urea solution denitrification reaction device. The output end of the first motor (21) is connected to the fixed rod (22). One end of the fixed rod (22) is fixedly connected to the stirring impeller (23). The outer surface of the fixed rod (22) is fixedly connected to the connecting rod (24). One end of the connecting rod (24) is connected to the stirring tube (25).

2. The urea solution denitration reaction device based on high-temperature flue gas pyrolysis according to claim 1, characterized in that: The cleaning mechanism (3) includes a conveying pipe (31), a conveying pipe (32), an observation window (33), a discharge pipe (34), a second motor (35), a screw shaft (36), and a collection box (37). The bottom wall of the urea solution denitrification reaction device (1) is connected to the conveying pipe (31). One end of the conveying pipe (31) is connected to the conveying pipe (32). An observation window (33) is opened on the outer surface of the conveying pipe (32). One end of the conveying pipe (32) is connected to the discharge pipe (34). One end of the conveying pipe (32) is equipped with a second motor (35). The output end of the second motor (35) is connected to the screw shaft (36). A collection box (37) is provided below the discharge pipe (34).

3. The urea solution denitration reaction device based on high-temperature flue gas pyrolysis according to claim 1, characterized in that: The main body (1) of the urea solution denitrification reaction device includes a base (11), a support foot (12), a reaction chamber (13), a smoke conveying pipe (14), a solution pipe (15), a water pump (16), and a urea solution storage tank (17). The support foot (12) is provided on the upper surface of the base (11). The reaction chamber (13) is fixedly connected to the upper surface of the support foot (12). The smoke conveying pipe (14) is connected to the upper surface of the reaction chamber (13). The solution pipe (15) is connected to the outer surface of the reaction chamber (13). One end of the solution pipe (15) is connected to the water pump (16). The input end of the water pump (16) is connected to the urea solution storage tank (17).

4. The urea solution denitration reaction device based on high-temperature flue gas pyrolysis according to claim 1, characterized in that: The first motor (21) and the fixed rod (22) form a rotating structure, and the outer surface of the fixed rod (22) is provided with connecting rods (24) at equal intervals.

5. The urea solution denitrification reaction device based on high-temperature flue gas pyrolysis according to claim 1, characterized in that: The connecting rod (24) is symmetrically arranged with respect to the length of the fixed rod (22), and the stirring impeller (23) is arranged in a ring array.

6. The urea solution denitrification reaction device based on high-temperature flue gas pyrolysis according to claim 2, characterized in that: The second motor (35) and the helical shaft (36) form a rotating structure, and the outer surface of the helical shaft (36) matches the inner surface of the conveying pipe (32).

7. The urea solution denitrification reaction device based on high-temperature flue gas pyrolysis according to claim 2, characterized in that: One end of the spiral shaft (36) is located below the main body (1) of the urea solution denitrification reaction device, and the other end of the spiral shaft (36) is located above the collection box (37).

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