Hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air hole and method of use

Abstract

The present application relates to hydrogen combustion equipment technical field, disclose a hydrogen combustion horizontal flow penetration micro mixing nozzle with secondary air hole and use method, hydrogen combustion horizontal flow penetration micro mixing nozzle with secondary air hole, including nozzle body, the nozzle body is equipped with flow regulating assembly, the flow regulating assembly divides the nozzle body into air cavity and mixing cavity, the flow regulating assembly is used for adjusting the air flow of air cavity into mixing cavity, the nozzle body inner side wall is fixedly connected with step, hydrogen gas channel and secondary air channel located in the mixing cavity are equipped in the step, the air outlet of the secondary air channel is located after the air outlet of the hydrogen gas channel, the present application solves the technical problem that the existing hydrogen combustion nozzle mixes evenly, low flow regulating precision, secondary air supply is insufficient.

Description

Technical Field

[0001] This invention relates to the field of hydrogen combustion equipment technology, and discloses a hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes and its usage method. Background Technology

[0002] Hydrogen energy, as a clean and efficient new energy source, is increasingly widely used in industrial combustion, power equipment, and other fields. During hydrogen combustion, the uniformity of hydrogen mixing with air, the timing of air supply, and flow control directly affect combustion efficiency, pollutant emissions (such as NOx), and combustion stability.

[0003] Existing hydrogen combustion nozzles have the following shortcomings: First, the air flow rate adjustment accuracy is low, making it difficult to flexibly match the hydrogen-air mixture ratio according to different combustion load requirements, resulting in an overly rich mixture at low loads and an overly lean mixture at high loads; Second, there is a lack of an effective secondary air supply structure, so the oxygen required after the initial combustion of hydrogen cannot be replenished in time, which easily leads to incomplete combustion; Third, although some nozzles are equipped with secondary air channels, the channel layout is unreasonable and the outlet direction is not guided, so the secondary air cannot be fully mixed with the incompletely burned hydrogen, and there are still problems of low combustion efficiency and excessive pollutant emissions. Summary of the Invention

[0004] The purpose of this invention is to overcome the technical problems of poor mixing uniformity, low flow rate adjustment accuracy, and insufficient secondary air supply in existing hydrogen combustion nozzles, and to provide a hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes and its usage method.

[0005] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows:

[0006] A hydrogen combustion crossflow penetration micro-mixing nozzle with a secondary air hole includes a nozzle body. The nozzle body is provided with a flow regulating component, which divides the nozzle body into an air chamber and a mixing chamber. The flow regulating component is used to regulate the air flow rate from the air chamber into the mixing chamber.

[0007] The nozzle body has a step fixedly connected to its inner side wall. The step has a hydrogen channel and a secondary air channel located inside the mixing chamber. The outlet of the secondary air channel is located after the outlet of the hydrogen channel.

[0008] In a preferred embodiment, the flow regulating component includes an regulating frame with an air hole inside. An regulating plate is slidably connected inside the air hole. An regulating screw is threaded onto the nozzle body. One end of the regulating screw is rotatably connected to the regulating plate, and the other end is fixedly connected to an regulating handle.

[0009] In a preferred embodiment, the step is fixedly connected to the center of the nozzle body, and the step is provided with two hydrogen channels and a secondary air channel, which are symmetrically arranged about the center of the step.

[0010] As a preferred embodiment, the step is equipped with a guide plate that matches the air outlet of the secondary air channel.

[0011] As a preferred embodiment, the air outlet of the secondary air channel is inclined toward the end of the step, and the inclination angle is 150°.

[0012] A method for using a hydrogen combustion crossflow penetration micro-mixing nozzle with a secondary air hole includes the following steps:

[0013] Step 1: Adjust the flow rate regulating component to control the air flow rate entering the mixing chamber from the air chamber;

[0014] Step 2: Introduce hydrogen gas into the hydrogen channel to inject the hydrogen gas into the mixing chamber;

[0015] Step 3: Introduce secondary air into the secondary air channel so that the secondary air is injected into the mixing chamber after the hydrogen ejection position;

[0016] Step 4: Ignite the hydrogen-air mixture in the mixing chamber to complete the combustion process.

[0017] Compared with the prior art, the beneficial effects of this invention are:

[0018] 1. Precise and flexible flow regulation: Through the linkage structure of the adjustment handle, adjustment screw and adjustment plate, the continuous and precise adjustment of the primary air flow can be achieved, adapting to the hydrogen-air mixture ratio requirements under different combustion loads, and solving the problem of coarse flow regulation of traditional nozzles;

[0019] II. High-efficiency secondary air supply: The secondary air channel outlet is located downstream of the hydrogen channel outlet. With a 150° tilt angle and guide plate design, the secondary air can accurately penetrate the incompletely combusted hydrogen flow, replenish oxygen in time, and significantly improve the mixing uniformity.

[0020] 3. High combustion efficiency and low emissions: The symmetrically distributed hydrogen and secondary air channels ensure circumferential mixing uniformity, and the cross-flow penetrating secondary air supply avoids the formation of local high temperature zones, which not only improves combustion thermal efficiency, but also effectively reduces NOx emissions.

[0021] IV. Compact structure and easy maintenance: The overall structure adopts an integrated design with fewer parts and reliable connections. The adjustment components are located outside the nozzle, which facilitates daily operation and maintenance and has a wide range of applications. Attached Figure Description

[0022] Figure 1 This is one of the overall perspective views of the present invention.

[0023] Figure 2 This is the second overall perspective view of the present invention.

[0024] Figure 3 This is an overall three-dimensional sectional view of the present invention.

[0025] Figure 4 This is a planar sectional view of the present invention.

[0026] Figure 5 This is a flowchart illustrating the method of using the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Nozzle body; 11. Air chamber; 12. Mixing chamber;

[0029] 2. Flow regulating assembly; 21. Regulating frame; 22. Air vent; 23. Regulating plate; 24. Regulating screw; 25. Regulating handle;

[0030] 3. Steps;

[0031] 4. Hydrogen gas passage; 5. Secondary air passage; 6. Guide plate. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0033] refer to Figure 1 , Figure 2 , Figure 3 The hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes includes a nozzle body 1. The nozzle body 1 is made of high-temperature resistant metal material, such as 304 stainless steel, and has an overall hollow columnar structure. Inside the nozzle body 1, there is a flow regulating component 2. The flow regulating component 2 divides the interior of the nozzle body 1 into an independent air chamber 11 and a mixing chamber 12. The air chamber 11 is used to store the primary air to be mixed in, and the mixing chamber 12 is used to achieve the mixing of hydrogen and air and preliminary combustion.

[0034] refer to Figure 3The flow rate regulating component 2 is used to precisely regulate the airflow entering the mixing chamber 12 from the air chamber 11. Specifically, it includes an regulating frame 21 fixedly connected to the inner wall of the nozzle body 1. The regulating frame 21 is a rectangular frame structure with a through air hole 22 in its center. The axis of the air hole 22 is collinear with the axis of the nozzle body 1. An regulating plate 23 is slidably connected inside the air hole 22. An regulating screw 24 is threaded through and connected to the side wall of the nozzle body 1. One end of the regulating screw 24 extends into the air hole 22 and is rotatably connected to the regulating plate 23 via a bearing. The other end is located outside the nozzle body 1 and fixedly connected to an regulating handle 25. The surface of the regulating handle 25 has anti-slip textures for easy manual operation. By rotating the regulating handle 25, the regulating screw 24 is driven to move axially, causing the regulating plate 23 to slide within the air hole 22, thereby changing the area of ​​the regulating plate 23 blocking the air hole 22 and achieving continuous regulation of the airflow.

[0035] refer to Figure 3 , Figure 4 A step 3 is fixedly connected to the center of the inner sidewall of the nozzle body 1. The step 3 is integrally formed or welded to the nozzle body 1, and its material is the same as that of the nozzle body 1. The step 3 is a columnar structure, and a hydrogen channel 4 and a secondary air channel 5 are opened inside the mixing chamber 12. The hydrogen channel 4 is used to transport hydrogen, and the secondary air channel 5 is used to transport secondary air. The outlet of the secondary air channel 5 is located downstream of the outlet of the hydrogen channel 4 along the axis of the step 3, that is, after the hydrogen is sprayed out, the secondary air can be replenished to the combustion area in time.

[0036] The step 3 is provided with two hydrogen channels 4 and two secondary air channels 5. The two hydrogen channels 4 and the two secondary air channels 5 are symmetrically distributed with the central axis of the step 3 as the axis of symmetry. This symmetrical layout can make hydrogen and secondary air sprayed out evenly along the circumference of the step 3, avoiding local mixing concentration imbalance.

[0037] refer to Figure 3 , Figure 4 To optimize the direction of secondary air ejection, a guide plate 6 is also installed on the step 3 to cooperate with the air outlet of the secondary air channel 5. The guide plate 6 is an arc-shaped high-temperature resistant metal plate, which is welded to the outer wall of the step 3 at the position corresponding to the air outlet. The guide plate 6 can guide the secondary air to ensure that it is accurately mixed into the incompletely burned hydrogen flow.

[0038] In addition, the outlet of the secondary air channel 5 is inclined at an angle of 150° toward the end of the step 3. This angle is defined as the angle between the axis of the outlet of the secondary air channel 5 and the axis of the step 3. This inclination angle can make the secondary air form a crossflow penetration effect, further enhancing the mixing effect with hydrogen.

[0039] Because the secondary air is ejected at an angle from the outlet of the secondary air channel 5, the high-temperature flame is avoided from burning the area between the outlet of the secondary air channel 5 and the end of the step 3, thus effectively protecting the structure of the step 3.

[0040] refer to Figure 5 Example 2, a method for using a hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes, based on the aforementioned hydrogen combustion crossflow penetration micro-mixing nozzle, includes the following steps:

[0041] Step 1: Adjust the flow rate regulating component 2 to control the air flow rate of the air chamber 11 into the mixing chamber 12;

[0042] Step 2: Introduce hydrogen into the hydrogen channel 4, so that the hydrogen is injected into the mixing chamber 12;

[0043] Step 3: Introduce secondary air into the secondary air channel 5 so that the secondary air is injected into the mixing chamber 12 after the hydrogen injection position;

[0044] Step 4: Ignite the hydrogen-air mixture in the mixing chamber 12 to complete the combustion process.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes, characterized in that, Includes a nozzle body (1), the nozzle body (1) is provided with a flow regulating component (2), the flow regulating component (2) divides the nozzle body (1) into an air chamber (11) and a mixing chamber (12), the flow regulating component (2) is used to regulate the air flow rate of the air chamber (11) into the mixing chamber (12); The nozzle body (1) has a step (3) fixedly connected to its inner wall. The step (3) has a hydrogen channel (4) and a secondary air channel (5) located in the mixing chamber (12). The outlet of the secondary air channel (5) is located between the end of the step (3) and the outlet of the hydrogen channel (4). The step (3) is fixedly connected to the center of the nozzle body (1). The step (3) is provided with two hydrogen channels (4) and two secondary air channels (5). The two hydrogen channels (4) and the two secondary air channels (5) are symmetrically arranged with respect to the center of the step (3). The step (3) is equipped with a guide plate (6) that matches the air outlet of the secondary air channel (5); The outlet of the secondary air channel (5) is inclined toward the end of the step (3) at an angle of 150°.

2. The hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes according to claim 1, characterized in that, The flow regulating component (2) includes an regulating frame (21), an air hole (22) is provided in the regulating frame (21), an regulating plate (23) is slidably connected in the air hole (22), and an regulating screw (24) is threadedly connected to the nozzle body (1). One end of the regulating screw (24) is rotatably connected to the regulating plate (23), and the other end is fixedly connected to an regulating handle (25).

3. A method for using a hydrogen combustion crossflow penetration micro-mixing nozzle with a secondary air hole, characterized in that, Based on the hydrogen combustion crossflow penetration micro-mixing nozzle with secondary air holes as described in claim 1 or 2, the process includes the following steps: Step 1: Adjust the flow rate regulating component (2) to control the air flow rate of the air chamber (11) into the mixing chamber (12); Step 2: Introduce hydrogen into the hydrogen channel (4) to inject hydrogen into the mixing chamber (12). Step 3: Introduce secondary air into the secondary air channel (5) so that the secondary air is injected into the mixing chamber (12) after the hydrogen ejection position. Step 4: Ignite the hydrogen-air mixture in the mixing chamber (12) to complete the combustion process.

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