High efficiency urea injection device
Patent Information
- Application Number
- CN202521756753.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-08-18
AI Technical Summary
[0003]为此，专门配置了窑炉尾气烟处理系统，其中就有专门脱硝的尿素溶液传输喷流系统，烟处理系统中的尿素喷液系统目前采用双泵单枪单管道系统，由于尿素喷液因温度的原因会产生结晶，使尿素泵、尿素喷枪故障或者管道堵塞，从而使尿素溶液不能正常喷流，影响SCR装置的除氮效果，使氮氧化物浓度可能不达标，虽然现有系统已经使用了双尿素泵，部分解决了因尿素泵故障影响尿素溶液喷流效果不佳的问题，但因尿素喷枪、尿素传输管道故障而产生尿素溶液喷流不畅的问题仍然没有解决
[0011]与现有技术相比，本实用新型的有益效果是：采用2套尿素溶液输送管道、2套尿素溶液喷枪为主要部件的运行模式，通过尿素泵提供溶液输送动力，使尿素溶液在管道内进行输送，通过喷枪处的压缩空气保证喷枪系统连续运行不堵塞，通过尿素管道内的压缩空气保证溶液在管道内不结晶堵塞，如果其中一套尿素溶液管道或者尿素溶液喷枪发生堵塞，可以通过打开另一套尿素溶液管道及尿素溶液喷枪来运行，从而保障整个尿素喷液大系统的正常运行。
Smart Images
Figure CN224700381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of TFT substrate glass manufacturing, specifically a high-efficiency urea spraying device. Background Technology
[0002] In the production of TFT glass, special glasses such as high-strength, high-hardness, and ultra-thin glass sheets are widely used, which requires melting glass at temperatures as high as 1600℃. In this process, a large amount of volatile boron oxide is present, and a large amount of natural gas is used. As a result, the furnace exhaust gas contains a lot of harmful components such as boron nitride dust and nitrogen oxides. In order to ensure that the production environment and air cleanliness meet the standards, the furnace exhaust gas needs to be treated to remove harmful components.
[0003] To address this issue, a dedicated kiln flue gas treatment system was configured, including a urea solution delivery and spraying system specifically for denitrification. Currently, the urea spraying system within the flue gas treatment system uses a dual-pump, single-gun, single-pipeline system. However, due to temperature-related crystallization of the urea solution, malfunctions of the urea pump, urea spray gun, or pipe blockages can occur, preventing the urea solution from being sprayed normally. This affects the denitrification effect of the SCR unit, potentially leading to substandard nitrogen oxide concentrations. Although the existing system uses dual urea pumps, partially resolving the issue of poor urea solution spraying caused by pump malfunctions, the problem of obstructed urea solution spraying due to urea spray gun or urea delivery pipeline malfunctions remains unresolved. Therefore, this project was developed to address this problem. Utility Model Content
[0004] The purpose of this invention is to provide a high-efficiency urea spraying device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, a high-efficiency urea spraying device is provided, comprising a urea spraying mechanism A and a urea spraying mechanism B. The urea spraying mechanism B is installed on one side of the urea spraying mechanism A, and a urea main pipe is installed below both the urea spraying mechanism A and the urea spraying mechanism B. A main nozzle is provided on the urea spraying mechanism A, and a secondary compressed air pipe A is installed on the surface of the main nozzle. A main urea solution connecting pipe is installed at the end of the main nozzle. A secondary nozzle is provided on the urea spraying mechanism B, and a secondary compressed air pipe B is installed on the surface of the secondary nozzle. A secondary urea solution connecting pipe is installed at the end of the secondary nozzle, and a switch valve is installed on the secondary urea solution connecting pipe.
[0006] Furthermore, the urea spraying mechanism A and the urea spraying mechanism B have the same structure. The urea spraying mechanism A includes a main gun barrel, a secondary compressed air pipe A, a main urea solution connecting pipe, a primary compressed air pipe A, a fixed plate, a connecting flange, and a nozzle. The urea spraying mechanism B includes an auxiliary gun barrel, a secondary compressed air pipe B, an auxiliary urea solution connecting pipe, a primary compressed air pipe B, and a switch valve.
[0007] Furthermore, nozzles are installed at the injection ends of both the main barrel and the auxiliary barrel. Both the main barrel and the auxiliary barrel are L-shaped. Fixing plates are installed on the outer circumference of both the main barrel and the auxiliary barrel. The fixing plates are circular and have multiple sets of mounting holes equidistantly opened on them. The included angle between the main barrel and the secondary compressed air pipe A is 45 degrees.
[0008] Furthermore, both the main barrel and the auxiliary barrel are equipped with connecting flanges at their tail ends, and the main barrel and the auxiliary barrel are fixedly connected to the main urea solution connecting pipe and the auxiliary urea solution connecting pipe respectively through the connecting flanges at their ends.
[0009] Furthermore, a primary compressed air pipe A and a primary compressed air pipe B are respectively fixedly installed on the main urea solution connecting pipe and the secondary urea solution connecting pipe, and the included angle between the main urea solution connecting pipe and the primary compressed air pipe A is 45 degrees.
[0010] Furthermore, the bottom of the main urea solution connecting pipe and the auxiliary urea solution connecting pipe are respectively connected to a main connecting pipe and an auxiliary connecting pipe. The main connecting pipe and the auxiliary connecting pipe are respectively fixedly connected to both sides of the surface of the urea main pipe. A metering pump connecting pipe is installed at the end of the urea main pipe. The metering pump connecting pipe is connected to the outlet of an external urea metering pump through a pipeline.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: it adopts an operation mode with two sets of urea solution conveying pipelines and two sets of urea solution spray guns as the main components. The urea pump provides the power for solution conveying, so that the urea solution is conveyed in the pipeline. The compressed air at the spray gun ensures that the spray gun system can operate continuously without clogging. The compressed air in the urea pipeline ensures that the solution does not crystallize and clog in the pipeline. If one set of urea solution pipelines or urea solution spray guns becomes clogged, the other set of urea solution pipelines and urea solution spray guns can be opened to resume operation, thereby ensuring the normal operation of the entire urea spraying system. Attached Figure Description
[0012] Figure 1 This is a front view schematic diagram of the structure of this utility model;
[0013] Figure 2 for Figure 1 Side view;
[0014] Figure 3 for Figure 1 A bottom view;
[0015] Figure 4 for Figure 1 Top view.
[0016] The diagram is labeled as follows: 100, Urea spraying mechanism A; 11, Main nozzle; 12, Secondary compressed air pipe A; 13, Main urea solution connecting pipe; 14, Primary compressed air pipe A; 15, Fixed plate; 16, Connecting flange; 17, Nozzle; 200, Urea spraying mechanism B; 21, Auxiliary nozzle; 22, Secondary compressed air pipe B; 23, Auxiliary urea solution connecting pipe; 24, Primary compressed air pipe B; 25, Switch valve; 300, Urea main pipe; 31, Main connecting pipe; 32, Auxiliary connecting pipe; 33, Metering pump connecting pipe. Detailed Implementation
[0017] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figures 1-4 This utility model provides a high-efficiency urea spraying device, including a urea spraying mechanism A100 and a urea spraying mechanism B200. The urea spraying mechanism B200 is installed on one side of the urea spraying mechanism A100, and a urea main pipe 300 is installed below both the urea spraying mechanism A100 and the urea spraying mechanism B200. A main gun barrel 11 is provided on the urea spraying mechanism A100, and a secondary compressed air pipe A12 is installed on the surface of the main gun barrel 11. At the same time, a main urea solution connecting pipe 13 is installed at the end of the main gun barrel 11. A secondary gun barrel 21 is provided on the urea spraying mechanism B200, and a secondary compressed air pipe B22 is installed on the surface of the secondary gun barrel 21. At the same time, a secondary urea solution connecting pipe 23 is installed at the end of the secondary gun barrel 21, and a switch valve 25 is installed on the secondary urea solution connecting pipe 23.
[0019] Working principle: such as Figures 1-4 As shown, when the external urea metering pump starts working, the urea solution flows through the main urea solution connecting pipe 13 to the main gun pipe 11. During operation, the compressed air inside the primary compressed air pipe A14 and the secondary compressed air pipe A12 continuously atomizes the urea solution inside the urea spraying mechanism A100. If the main gun pipe 11 or the main urea solution connecting pipe 13 in the urea spraying mechanism A100 becomes blocked, the switch valve 25 can be opened immediately. At the same time, the compressed air inside the secondary compressed air pipe B22 and the primary compressed air pipe B24 atomizes the urea solution inside the urea spraying mechanism B200, allowing the urea solution to reach the secondary gun pipe 21 through the auxiliary urea solution connecting pipe 23, and finally spray out from the nozzle 17. By using the urea spraying mechanism B200, the normal operation of the spraying process is ensured.
[0020] Based on the original dual urea pump, the urea gun and pipeline system delivery method has been improved. The original urea spray gun system is retained, and an additional urea spray gun system, urea spraying mechanism B200, is added to the main exhaust duct, thus forming a dual urea solution delivery system. This avoids the impact of a single urea solution delivery system failure on urea solution spraying, which in turn affects the NOx removal effect, and ultimately effectively ensures that the nitrogen oxide concentration meets the standard.
[0021] In a preferred embodiment, the urea spraying mechanism A100 and the urea spraying mechanism B200 have the same structure. The urea spraying mechanism A100 includes a main gun barrel 11, a secondary compressed air pipe A12, a main urea solution connecting pipe 13, a primary compressed air pipe A14, a fixed plate 15, a connecting flange 16, and a nozzle 17. The urea spraying mechanism B200 includes an auxiliary gun barrel 21, a secondary compressed air pipe B22, an auxiliary urea solution connecting pipe 23, a primary compressed air pipe B24, and a switch valve 25.
[0022] Both the main barrel 11 and the auxiliary barrel 21 are equipped with nozzles 17 at their injection ends. Both the main barrel 11 and the auxiliary barrel 21 are L-shaped. Both the main barrel 11 and the auxiliary barrel 21 are equipped with fixing plates 15 on their outer circumference. The fixing plates 15 are circular and have multiple sets of mounting holes equidistantly spaced on them. The angle between the main barrel 11 and the secondary compressed air pipe A12 is 45 degrees.
[0023] Both the main barrel 11 and the auxiliary barrel 21 are equipped with connecting flanges 16 at their tail ends. The main barrel 11 and the auxiliary barrel 21 are fixedly connected to the main urea solution connecting pipe 13 and the auxiliary urea solution connecting pipe 23 respectively through the connecting flanges 16 at their ends.
[0024] A primary compressed air pipe A14 and a primary compressed air pipe B24 are fixedly installed on the main urea solution connecting pipe 13 and the secondary urea solution connecting pipe 23, respectively, and the included angle between the main urea solution connecting pipe 13 and the primary compressed air pipe A14 is 45 degrees.
[0025] In a preferred embodiment, the bottom of the main urea solution connecting pipe 13 and the auxiliary urea solution connecting pipe 23 are respectively connected to the main connecting pipe 31 and the auxiliary connecting pipe 32. The main connecting pipe 31 and the auxiliary connecting pipe 32 are respectively fixedly connected to both sides of the surface of the urea main pipe 300. A metering pump connecting pipe 33 is installed at the end of the urea main pipe 300. The metering pump connecting pipe 33 is connected to the outlet of the external urea metering pump through a pipe.
[0026] like Figures 1-4As shown, the urea solution from the urea metering pump can reach the auxiliary gun tube 21 through the auxiliary urea solution connecting pipe 23 and continue to operate normally, thereby effectively avoiding the impact of blockage in the urea solution delivery system including the main urea solution connecting pipe 13 and the main gun tube 11, and ultimately ensuring the continued normal operation of the entire urea spraying system.
[0027] The system operates using one urea metering pump, two sets of urea solution delivery pipelines, and two sets of urea solution spray guns as its main components. The urea pump provides the power for solution delivery within the pipelines. Compressed air at the spray guns ensures continuous, unobstructed operation of the spray gun system, while compressed air within the urea pipelines prevents crystallization and blockage. If one set of urea solution pipelines or spray guns becomes blocked, the other set can be opened to resume operation, thus ensuring the normal operation of the entire urea spraying system. For example: Figures 2-4 As shown, when the urea metering pump starts working, the urea solution flows through the main urea solution connecting pipe 13 to the main nozzle 11. During operation, the compressed air inside the primary compressed air pipe A14 and the secondary compressed air pipe A12 can be continuously opened to atomize the urea solution. When a blockage occurs in the main nozzle 11 or the main urea solution connecting pipe 13 in this system, the switch valve 25 can be opened immediately. At the same time, the compressed air inside the secondary compressed air pipe B22 and the primary compressed air pipe B24 atomizes the urea solution. In this way, the urea solution from the urea metering pump can reach the secondary nozzle 21 through the auxiliary urea solution connecting pipe 23 and continue to operate normally. This effectively avoids the impact of blockage in the urea solution delivery system, including the main urea solution connecting pipe 13 to the main nozzle 11, and ultimately ensures that the entire urea spraying system continues to operate normally.
[0028] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.
Claims
1. A high-efficiency urea spraying device, comprising a urea spraying mechanism A (100) and a urea spraying mechanism B (200), characterized in that: A urea spraying mechanism A (100) is equipped with a urea spraying mechanism B (200) on one side, and a urea main pipe (300) is installed below both the urea spraying mechanism A (100) and the urea spraying mechanism B (200). A main gun barrel (11) is provided on the urea spraying mechanism A (100), and a secondary compressed air pipe A (12) is installed on the surface of the main gun barrel (11). At the same time, a main urea solution connecting pipe (13) is installed at the end of the main gun barrel (11). A secondary gun barrel (21) is provided on the urea spraying mechanism B (200), and a secondary compressed air pipe B (22) is installed on the surface of the secondary gun barrel (21). At the same time, a secondary urea solution connecting pipe (23) is installed at the end of the secondary gun barrel (21), and a switch valve (25) is installed on the secondary urea solution connecting pipe (23).
2. The high-efficiency urea spraying device according to claim 1, characterized in that: The urea spraying mechanism A (100) and the urea spraying mechanism B (200) have the same structure. The urea spraying mechanism A (100) includes a main gun barrel (11), a secondary compressed air pipe A (12), a main urea solution connecting pipe (13), a primary compressed air pipe A (14), a fixed plate (15), a connecting flange (16), and a nozzle (17). The urea spraying mechanism B (200) includes an auxiliary gun barrel (21), a secondary compressed air pipe B (22), an auxiliary urea solution connecting pipe (23), a primary compressed air pipe B (24), and a switch valve (25).
3. The high-efficiency urea spraying device according to claim 2, characterized in that: The main gun barrel (11) and the auxiliary gun barrel (21) are both equipped with nozzles (17) at their injection ends. The main gun barrel (11) and the auxiliary gun barrel (21) are both "L" shaped. The outer circumference of the main gun barrel (11) and the auxiliary gun barrel (21) is equipped with a fixing plate (15). The fixing plate (15) is circular and has multiple sets of mounting holes equidistantly opened on it. The included angle between the main gun barrel (11) and the secondary compressed air pipe A (12) is 45 degrees.
4. The high-efficiency urea spraying device according to claim 3, characterized in that: Both the main barrel (11) and the auxiliary barrel (21) are equipped with connecting flanges (16) at their tail ends. The main barrel (11) and the auxiliary barrel (21) are fixedly connected to the main urea solution connecting pipe (13) and the auxiliary urea solution connecting pipe (23) respectively through the connecting flanges (16) at their ends.
5. The high-efficiency urea spraying device according to claim 4, characterized in that: The main urea solution connecting pipe (13) and the auxiliary urea solution connecting pipe (23) are respectively fixedly provided with a primary compressed air pipe A (14) and a primary compressed air pipe B (24), and the included angle between the main urea solution connecting pipe (13) and the primary compressed air pipe A (14) is 45 degrees.
6. The high-efficiency urea spraying device according to claim 5, characterized in that: The bottom of the main urea solution connecting pipe (13) and the auxiliary urea solution connecting pipe (23) are respectively connected to the main connecting pipe (31) and the auxiliary connecting pipe (32). The main connecting pipe (31) and the auxiliary connecting pipe (32) are respectively fixedly connected to both sides of the surface of the urea main pipe (300). A metering pump connecting pipe (33) is installed at the end of the urea main pipe (300). The metering pump connecting pipe (33) is connected to the outlet of the external urea metering pump through a pipe.