A direction adjustable gas boiler combustion air nozzle device

Abstract

The utility model relates to the technical field of boiler, specifically disclose a kind of direction-adjustable gas boiler afterburning air jet nozzle device. Including: air inlet pipeline one end is communicated with air inlet source, and the other end is fixed on gas boiler;Adjusting nozzle one end is hinged in air inlet pipeline and is communicated with air inlet pipeline, and the other end is inserted into gas boiler;Nozzle adjusting mechanism includes adjusting support, adjusting shaft sleeve, adjusting shaft and adjusting bearing, adjusting support is fixed outside air inlet pipeline, adjusting shaft sleeve is fixed on adjusting support, adjusting shaft is rotatably arranged in adjusting shaft sleeve by adjusting bearing, the part of adjusting nozzle inserted into air inlet pipeline is equipped with fixed groove, adjusting shaft one end is inserted into air inlet pipeline and is equipped with fixed block and fixed groove clamping, and the other end is equipped with rotary drive part.The nozzle device of the utility model can adjust the direction of boiler combustion air according to boiler load and boiler combustion condition in time, realize the reasonable configuration of combustion air by adjusting the nozzle direction of afterburning air in time.

Description

Technical Field

[0001] This utility model relates to the technical field of boilers, and specifically discloses an adjustable direction gas boiler combustion air nozzle device. Background Technology

[0002] Gas boilers are common industrial equipment widely used in heating, steam production, and other fields. Their working principle involves burning coal gas to generate a high-temperature flame, which transfers heat to water or other media within the boiler, producing steam or hot water. Gas boilers offer advantages such as high combustion efficiency and stable calorific value, meeting the high-temperature heat demands of industrial production. They are typically used to provide stable heat supply and are usually installed in areas with abundant coal gas production, such as steel mills.

[0003] However, gas boilers produce polluting gases such as NOx and SO2 during combustion. The sources of NOx are generally fuel-based NOx, thermal NOx, and rapid NOx. To reduce and control NOx production, SNCR, SCR, and low-NOx combustion technologies are commonly used, but these are costly. Therefore, a solution is needed to reduce the production of polluting gases during the combustion process of gas boilers. Utility Model Content

[0004] Existing gas boilers typically use a straight-tube nozzle for the burnout air, which cannot be adjusted in direction. This leads to insufficient mixing of air and fuel during combustion, easily resulting in localized oxygen-rich or oxygen-deficient combustion, promoting the formation of nitrogen oxides (NOx) and thus increasing pollutant emissions. The purpose of this invention is to overcome the shortcomings of the existing technology and provide an adjustable-direction burnout air nozzle device for gas boilers.

[0005] This utility model discloses an adjustable-direction gas boiler combustion air nozzle device, which adopts the following technical solution:

[0006] An adjustable-direction gas boiler combustion air nozzle device, comprising:

[0007] The air inlet duct is connected at one end to the air source and at the other end to the gas boiler.

[0008] An adjusting nozzle is provided, with one end hinged inside the air inlet duct and connected to the air inlet duct, and the other end extending into the gas boiler. A rotation gap is left between the adjusting nozzle and the inner wall of the air inlet duct.

[0009] The nozzle adjustment mechanism includes an adjustment bracket, an adjustment sleeve, an adjustment shaft, and an adjustment bearing. The adjustment bracket is fixed outside the air inlet duct, the adjustment sleeve is fixed on the adjustment bracket, and the adjustment shaft is rotatably disposed inside the adjustment sleeve via the adjustment bearing. The portion of the adjustment nozzle that extends into the air inlet duct is provided with a fixing groove. One end of the adjustment shaft passes through the air inlet duct and is provided with a fixing block that engages with the fixing groove. The other end is equipped with a rotary drive component.

[0010] Preferably, the adjusting nozzle includes a nozzle section, an air inlet section, and a transition section connecting the two. The nozzle section extends into the gas boiler, and the air inlet section extends into the air inlet pipe and is hinged thereto.

[0011] Preferably, the cross-sectional dimension of the nozzle section is smaller than that of the air inlet section, and the cross-sectional dimension of the transition section gradually decreases from the air inlet section to the nozzle section.

[0012] Preferably, the end of the nozzle section is provided with an expansion slit.

[0013] Preferably, the nozzle section is provided with a partition plate, which divides the nozzle section into at least two air chambers.

[0014] Preferably, the air inlet duct is provided with a positive flange, and the gas boiler is provided with a reverse flange. The air inlet duct is installed on the gas boiler through the connection between the positive flange and the reverse flange.

[0015] Preferably, the transition section extends from the air inlet duct, across the positive flange and the negative flange of the air duct, into the gas boiler.

[0016] Preferably, the fixing groove is tooth-shaped, and the fixing block is a tooth that matches the tooth-shaped fixing groove.

[0017] Preferably, the adjusting nozzle is a 310S steel pipe with a length of 200-400mm.

[0018] Preferably, an air volume butterfly valve is installed inside the air inlet duct, and the air volume butterfly valve is equipped with an air volume regulating drive.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] This invention involves installing an adjusting nozzle between the air inlet duct and the gas boiler. The adjusting nozzle is hinged in the air inlet duct and is driven to rotate by a rotary drive component. This allows for timely adjustment of the direction of the combustion air according to the boiler load and combustion conditions. By adjusting the direction of the burnout air nozzle in a timely manner to track the flame height, a reasonable configuration of the combustion air is achieved, thereby controlling NOx generation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the adjustable-direction gas boiler burnout air nozzle device in this embodiment.

[0022] Figure 2 This is a schematic diagram of the adjustable nozzle and nozzle adjustment mechanism of the adjustable direction gas boiler burnout air nozzle device in this embodiment.

[0023] Figure 3 This is a schematic diagram of the air inlet pipe installation for the adjustable-direction gas boiler burnout air nozzle device in this embodiment.

[0024] Explanation of icon numbers:

[0025] 1. Air inlet duct; 11. Air duct positive flange; 2. Adjusting nozzle; 21. Nozzle section; 211. Expansion joint; 212. Spare plate; 22. Transition section; 23. Air inlet section; 231. Fixing groove; 3. Adjusting bushing; 31. Adjusting bearing; 4. Adjusting shaft; 41. Fixing block; 5. Rotary drive component; 6. Air duct reverse flange; 7. Air volume butterfly valve; 8. Air volume adjustment drive component. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This embodiment discloses an adjustable-direction gas boiler combustion air nozzle device, referring to... Figure 1-2It includes an air inlet duct 1, an adjusting nozzle 2, and a nozzle adjusting mechanism. One end of the air inlet duct 1 is connected to the air source, and the other end is fixed to the gas boiler, providing a channel for the delivery of combustion air. One end of the adjusting nozzle 2 is hinged inside the air inlet duct 1 and connected to the air inlet duct 1, and the other end extends into the gas boiler, with a rotational clearance between the adjusting nozzle 2 and the inner wall of the air inlet duct 1. The nozzle adjusting mechanism includes an adjusting bracket, an adjusting bushing 3, an adjusting bearing 31, and an adjusting shaft 4. A fixing groove 231 is provided on the adjusting nozzle 2, the adjusting bracket is fixed outside the air inlet duct 1, the adjusting bushing 3 is fixed on the adjusting bracket, and the adjusting shaft 4 is rotatably mounted inside the adjusting bushing 3 via the adjusting bearing 31. One end of the adjusting shaft 4 passes through the air inlet duct 1 and is provided with a fixing block 41, and the other end is equipped with a rotary drive component 5. The fixing block 41 is engaged with the fixing groove 231 of the adjusting nozzle 2. The rotary drive component 5 drives the adjusting shaft 4 to rotate, causing the fixed block 41 to drive the adjusting nozzle 2 to rotate within a certain range through the fixed groove 231. This achieves directional adjustment of the adjusting nozzle 2 to better adapt to different combustion conditions. The combustion air can be adjusted in a timely manner according to the flame height, optimizing the combustion effect, improving combustion efficiency, and effectively reducing NOx generation, alleviating environmental pressure, and effectively reducing boiler flue gas denitrification costs, even achieving zero-cost flue gas denitrification emissions. Specifically, the rotary drive component 5 can be manual, but in this embodiment, it is preferably an electric actuator including a stepper motor, controlled by a DCS system. This allows for better precise control of the direction of the adjusting nozzle 2, making operation simple and adjustment flexible and reliable.

[0028] Reference Figure 2 In this embodiment, the regulating nozzle 2 includes a nozzle section 21, an air inlet section 23, and a transition section 22 connecting the two. The nozzle section 21 extends into the gas boiler, and the air inlet section 23 extends into the air inlet pipe 1 and is hinged thereto. The cross-sectional dimension of the nozzle section 21 is smaller than that of the air inlet section 23, and the cross-sectional dimension of the transition section 22 gradually decreases from the air inlet section 23 to the nozzle section 21. This segmented structural design makes the functions of each part of the regulating nozzle 2 more clearly defined. The nozzle section 21 focuses on injecting the combustion air into the gas boiler, the air inlet section 23 is responsible for the connection and transition with the air inlet pipe 1, and the transition section 22 serves as a connection and transition, while providing sufficient space for the rotation of the regulating nozzle 2, further improving the flexibility and adaptability of the regulating nozzle 2, and enhancing the overall performance and reliability of the device. In addition, this design with varying dimensions helps to reduce the resistance of the nozzle section 21 in the gas boiler, allowing the combustion air to be injected into the boiler more smoothly, increasing the pressure head of the combustion air, and improving the delivery efficiency of the combustion air.

[0029] As a preferred option, the regulating nozzle 2 is made of 310S steel pipe with a length of 200–400 mm. 310S steel pipe has excellent high-temperature resistance and corrosion resistance, enabling it to withstand the high temperatures and corrosive gases in the combustion environment of a gas boiler, ensuring the stability and reliability of the regulating nozzle 2 during long-term operation. Simultaneously, the overall length of the regulating nozzle 2 is preferably within the range of 200–400 mm, which not only meets the requirements for effective delivery and distribution of combustion air within the combustion chamber but also ensures the compactness and flexibility of the nozzle structure, facilitating installation and adjustment, further optimizing the overall performance and service life of the device.

[0030] As a preferred embodiment, the nozzle section 21 is provided with an expansion joint 211 at its end. The expansion joint 211 can effectively alleviate the stress generated by thermal expansion of the nozzle section 21 under high temperature environment, prevent the nozzle section 21 from deforming or being damaged due to excessive thermal stress, thereby ensuring the stability and reliability of the nozzle during long-term high-temperature operation, extending the service life of the nozzle, and also helping to improve the combustion performance and efficiency of the nozzle.

[0031] As a preferred embodiment, the nozzle section 21 is provided with a partition plate 212, which divides the nozzle section 21 into at least two air chambers. The partition plate 212 plays a role in distribution and flow equalization, enabling the combustion air entering the nozzle section 21 to be evenly distributed into each air chamber, making the flow rate of each stream of combustion air more uniform and stable, and avoiding situations where the local flow rate is too large or too small. This ensures that the combustion air ejected from the nozzle has better uniformity, improves the stability of combustion, and makes the combustion process more complete and uniform, thereby further improving combustion efficiency and reducing pollutant emissions caused by incomplete combustion. This is of great significance for optimizing the combustion performance of gas boilers and reducing environmental pollution.

[0032] As a preferred option, refer to Figure 3 The air inlet duct 1 is equipped with a positive flange 11, and the gas boiler is equipped with a reverse flange 6. The air inlet duct 1 is installed on the gas boiler through the connection between the positive flange 11 and the reverse flange. Using a flange connection makes the connection between the air inlet duct 1 and the gas boiler more robust and reliable, with good sealing performance, effectively preventing leakage of combustion air during transportation. At the same time, the flange connection facilitates installation and disassembly, making maintenance and repair easier and improving the ease of use and maintainability of the device. Furthermore, the transition section 22 in this design extends from inside the air inlet duct 1, across the positive flange 11 and the reverse flange 6, into the gas boiler. This structural design allows the regulating nozzle 2 to smoothly cross the flange connection, ensuring the overall structural integrity and continuity of the regulating nozzle 2, without affecting the normal rotation and adjustment function of the nozzle, while also ensuring the smooth flow of combustion air within the nozzle, further improving the performance and reliability of the device.

[0033] As a preferred embodiment, the fixing groove 231 is toothed, and the fixing block 41 is a tooth that matches the toothed fixing groove 231. The design of the toothed fixing groove 231 and the fixing block 41 not only facilitates installation but also makes the connection between the adjusting shaft 4 and the adjusting nozzle 2 tighter and more secure. This effectively prevents slippage or loosening during adjustment, improves the accuracy and stability of adjustment, ensures that the nozzle direction can be accurately adjusted to the required position, and enhances the reliability of the device.

[0034] As a preferred embodiment, an air volume butterfly valve 7 is installed inside the air inlet duct 1, and the air volume butterfly valve 7 is equipped with an air volume regulating drive component 8. By installing the air volume butterfly valve 7 and equipping it with the air volume regulating drive component 8 inside the air inlet duct 1, precise control of the combustion air volume can be achieved. The supply of combustion air can be flexibly adjusted according to different combustion conditions and requirements, further optimizing the combustion process, improving combustion efficiency and stability, and also helping to reduce energy consumption and pollutant emissions, thus enhancing the overall performance and adaptability of the device. In this embodiment, the air volume regulating drive component 8 is preferably an electric actuator including a stepper motor, also controlled by a DCS system, facilitating intelligent adjustment of the air intake volume according to the combustion conditions.

[0035] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An adjustable-direction gas boiler combustion air nozzle device, characterized in that, include: The air inlet duct is connected to the air source at one end and fixed to the gas boiler at the other end. An adjusting nozzle is provided, with one end hinged inside the air inlet duct and connected to the air inlet duct, and the other end extending into the gas boiler. A rotation gap is left between the adjusting nozzle and the inner wall of the air inlet duct. The nozzle adjustment mechanism includes an adjustment bracket, an adjustment sleeve, an adjustment shaft, and an adjustment bearing. The adjustment bracket is fixed outside the air inlet duct, the adjustment sleeve is fixed on the adjustment bracket, and the adjustment shaft is rotatably disposed inside the adjustment sleeve via the adjustment bearing. The portion of the adjustment nozzle that extends into the air inlet duct is provided with a fixing groove. One end of the adjustment shaft passes through the air inlet duct and is provided with a fixing block that engages with the fixing groove. The other end is equipped with a rotary drive component. The regulating nozzle includes a nozzle section, an air inlet section, and a transition section connecting the two. The nozzle section extends into the gas boiler, and the air inlet section extends into the air inlet pipe and is hinged thereto. The air inlet duct is provided with a positive flange, and the gas boiler is provided with a reverse flange. The air inlet duct is installed on the gas boiler through the connection between the positive flange and the reverse flange. The transition section extends from the air inlet duct, across the positive flange and the negative flange of the air duct, into the gas boiler.

2. The adjustable-direction gas boiler combustion air nozzle device according to claim 1, characterized in that, The cross-sectional dimension of the nozzle section is smaller than that of the air inlet section, and the cross-sectional dimension of the transition section gradually decreases from the air inlet section to the nozzle section.

3. The adjustable-direction gas boiler combustion air nozzle device according to claim 1, characterized in that, The nozzle section has an expansion joint at its end.

4. The adjustable-direction gas boiler combustion air nozzle device according to claim 1, characterized in that, The nozzle section is provided with a partition plate, which divides the nozzle section into at least two air chambers.

5. The adjustable-direction gas boiler combustion air nozzle device according to claim 1, characterized in that, The fixing groove is tooth-shaped, and the fixing block is a tooth that matches the tooth-shaped fixing groove.

6. The adjustable-direction gas boiler combustion air nozzle device according to claim 1, characterized in that, The adjusting nozzle is made of 310S steel pipe with a length of 200~400mm.

7. The adjustable-direction gas boiler combustion air nozzle device according to claim 1, characterized in that, An air volume butterfly valve is installed inside the air inlet duct, and the air volume butterfly valve is equipped with an air volume regulating drive.

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