Natural gas hydrogen-oxygen negative pressure mixer structure

Abstract

The utility model relates to a kind of natural gas hydrogen-oxygen gas negative pressure mixer structure, including fixed seat, ignition device, gas pipe, hydrogen-oxygen gas pipe and combustion air duct, the gas pipe and hydrogen-oxygen gas pipe are located in combustion air duct inside, combustion air duct front end is provided flame outlet, hydrogen-oxygen gas pipe front end is connected with gas pipeline middle section by jet mixer, gas pipe front end is closed and has gas hole around, gas pipe front end stretches to flame outlet place.The utility model natural gas hydrogen-oxygen gas negative pressure mixer structure structure is novel, reasonable in design, using internal mixing structure, hydrogen-oxygen gas and gas are mixed in burner, avoid the security risk that hydrogen-oxygen gas exists in external premixing, improve safety, and mixed by jet mixer, utilize venturi effect, by the negative pressure formed active suction hydrogen-oxygen gas generated, ensure that mixing is uniform, improve combustion efficiency, reduce energy loss.

Description

Technical Field

[0001] This utility model relates to the field of mixed combustion technology, and in particular to a structure for a natural gas hydrogen-oxygen negative pressure mixer. Background Technology

[0002] Existing combustion kilns mostly use a mixture of pure hydrogen and natural gas as fuel, which offers high safety but also high investment costs. With increasing environmental awareness and the development of renewable energy, finding cleaner and more efficient energy alternatives is becoming increasingly important. Hydrogen and oxygen are a high-calorific-value mixture of gases. Produced in a hydrogen-oxygen generator using water as a raw material through electrolysis and other processes, this mixture of hydrogen and oxygen in a specific ratio produces high energy density upon combustion. It only produces water vapor and emits no harmful gases, thus being considered an environmentally friendly and clean fuel.

[0003] Because hydrogen and oxygen have extremely high combustion speeds and explosiveness, and existing burners premix pure hydrogen and natural gas before they enter the burner, there may be safety hazards if they are directly applied to the combustion of hydrogen-oxygen and natural gas mixtures. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a natural gas hydrogen-oxygen negative pressure mixer structure that uses hydrogen, oxygen and natural gas as mixed fuels, reduces input costs, is safe and reliable, ensures uniform mixing, and improves combustion efficiency.

[0005] The utility model adopts the following solution: a natural gas hydrogen-oxygen negative pressure mixer structure, including a fixed base, an ignition device, a gas pipe, a hydrogen-oxygen pipe and a combustion-supporting air duct. The gas pipe and the hydrogen-oxygen pipe are located inside the combustion-supporting air duct. A flame outlet is provided at the front end of the combustion-supporting air duct. The front end of the hydrogen-oxygen pipe is connected to the middle section of the gas pipe through a jet mixer. The front end of the gas pipe is closed and has gas outlet holes distributed around its perimeter. The front end of the gas pipe extends to the flame outlet.

[0006] Furthermore, the jet mixer includes a nozzle and a mixing tube fitted on the nozzle. The mixing tube has a negative pressure suction chamber, a constriction inlet, a mixing throat, and a diffusion outlet arranged sequentially from back to front. The nozzle has a conical nozzle located in the middle of the negative pressure suction chamber at the front. The mixing tube has an suction port communicating with the negative pressure suction chamber at the rear side.

[0007] Furthermore, the rear ends of the gas pipe and the hydrogen-oxygen pipe are connected to a fixed base, and the fixed base has a gas inlet communicating with the gas pipe and a hydrogen-oxygen inlet communicating with the hydrogen-oxygen pipe.

[0008] Furthermore, the front of the fixed base is provided with a first flange, the rear end of the combustion air duct is provided with a second flange connected to the first flange, and the rear side of the combustion air duct is provided with an air inlet.

[0009] Furthermore, a flange located in front of the air inlet is fixedly connected to the outside of the combustion-supporting air duct.

[0010] Furthermore, an air outlet plate is provided inside the combustion-supporting air duct near the flame outlet, and several air outlet holes are distributed on the air outlet plate. Several inclined swirl grooves are distributed around the periphery of the air outlet plate and penetrate both sides of the air outlet plate.

[0011] Furthermore, the ignition device includes an ignition electrode connected to a mounting base, with a probe of the ignition electrode extending to the flame outlet.

[0012] Furthermore, a flame detection electrode is also connected to the mounting base, and the probe of the flame detection electrode extends to the flame outlet.

[0013] Furthermore, the flame outlet is cone-shaped.

[0014] Furthermore, a flame arrester is connected to the hydrogen-oxygen pipeline.

[0015] Compared with existing technologies, this utility model has the following advantages: The natural gas hydrogen-oxygen negative pressure mixer of this utility model has a reasonable and novel structural design. It adopts an internal fuel mixing structure, mixing hydrogen, oxygen and gas inside the burner, avoiding the safety hazards of external premixing of hydrogen and oxygen, making it safe and reliable. Furthermore, the mixing is carried out through a jet mixer, utilizing the Venturi effect to actively draw in hydrogen and oxygen by generating negative pressure, ensuring uniform mixing, improving combustion efficiency, and reducing energy consumption. As hydrogen, oxygen and natural gas are used as mixed fuels, the amount of natural gas used is reduced. Since the combustion of hydrogen and oxygen only produces water vapor with no harmful emissions, it conforms to the trend of clean energy and reduces input costs.

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this utility model; Figure 2 This is a cross-sectional view of the jet mixer according to an embodiment of the present invention; Figure 3 yes Figure 1 View from the center (K ​​direction); The following are the labels in the diagram: 110-Fixed base, 111-Gas inlet, 112-Hydrogen-oxygen inlet, 113-First flange, 120-Gas pipe, 121-Gas outlet, 130-Hydrogen-oxygen pipe, 131-Flame arrester, 140-Combustion duct, 141-Flame outlet, 142-Second flange, 143-Air inlet, 144-Flange, 150-Jet mixer, 151-Nozzle, 152-Mixing tube, 153-Negative pressure suction chamber, 154-Contraction inlet, 155-Mixing throat, 156-Diffusion outlet, 157-Suction port, 160-Air outlet plate, 161-Air outlet, 162-Swirl channel, 170-Ignition electrode, 180-Flame detection electrode. Detailed Implementation

[0018] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] like Figures 1-3 As shown, a natural gas hydrogen-oxygen negative pressure mixer structure includes a fixed base 110, an ignition device, a gas pipe 120, a hydrogen-oxygen pipe 130, and a combustion-supporting air duct 140. The gas pipe and the hydrogen-oxygen pipe are located inside the combustion-supporting air duct. The gas pipe 120 is located at the center of the combustion-supporting air duct 140. A flame outlet 141 is provided at the front end of the combustion-supporting air duct. The front end of the hydrogen-oxygen pipe is connected to the middle section of the gas pipe through a jet mixer 150. The front end of the gas pipe is closed and has gas outlet holes 121 distributed around its periphery. The front end of the gas pipe 120 extends to the flame outlet. The system employs an internal fuel mixing structure, where hydrogen, oxygen, and natural gas are mixed within the burner. This avoids the safety hazards associated with external premixing of hydrogen and oxygen, ensuring safety and reliability. Furthermore, the mixing is achieved through a jet mixer, utilizing the Venturi effect to actively draw in hydrogen and oxygen by creating negative pressure, ensuring uniform mixing, improving combustion efficiency, and reducing energy consumption. As a blended fuel, the hydrogen and oxygen content can be increased to approximately 30%, reducing natural gas consumption. Since the combustion of hydrogen and oxygen only produces water vapor with no harmful emissions, it aligns with the trend towards clean energy and reduces investment costs.

[0021] In this embodiment, a section of the gas pipe is disconnected in the middle to connect to the jet mixer 150. The two ends of the jet mixer 150 are welded to the two ends of the disconnected section of the gas pipe. The jet mixer 150 includes a nozzle 151 and a mixing tube 152 fitted on the nozzle. The mixing tube has a negative pressure suction chamber 153, a constriction inlet 154, a mixing throat 155, and a diffusion outlet 156 arranged sequentially from back to front inside. The nozzle has a conical nozzle located in the middle of the negative pressure suction chamber at the front. The mixing tube has an intake port 157 communicating with the negative pressure suction chamber at the rear side.

[0022] In this embodiment, the rear ends of the gas pipe 120 and the hydrogen-oxygen pipe 130 are connected to a fixed base. The fixed base 110 is provided with a gas inlet 111 communicating with the gas pipe and a hydrogen-oxygen inlet 112 communicating with the hydrogen-oxygen pipe.

[0023] In this embodiment, the front of the mounting base is provided with a first flange portion 113, the rear end of the combustion-supporting air duct is provided with a second flange portion 142 that is bolted to the first flange portion, and the rear side of the combustion-supporting air duct is provided with an air inlet 143. The mounting base 110 and the combustion-supporting air duct are connected by a flange, which supports modular assembly and facilitates on-site disassembly and replacement of components.

[0024] In this embodiment, a flange 144 is fixedly connected to the outside of the combustion air duct, located in front of the air inlet. The flange facilitates the installation of the entire burner onto the combustion kiln.

[0025] In this embodiment, an air outlet plate 160 is provided inside the combustion-supporting air duct near the flame outlet. The air outlet plate has several air outlet holes 161 distributed on it, and several inclined swirl grooves 162 are distributed around its perimeter, extending through both sides of the air outlet plate. The design of the air outlet plate enhances the mixing effect of air and fuel, and the swirl grooves generate a swirling effect, making the flame more concentrated and stable, resulting in better combustion.

[0026] In this embodiment, the ignition device includes an ignition electrode 170 connected to a fixed base, and the probe of the ignition electrode extends to the flame outlet.

[0027] In this embodiment, a flame detection electrode 180 is also connected to the mounting base, and the probe of the flame detection electrode extends to the flame outlet. The flame detection electrode 180 is used to detect whether ignition is successful. If unsuccessful ignition is detected, the external natural gas inlet pipeline is cut off. The air outlet plate 160 is also provided with clearance holes for the gas pipe, the probe of the ignition electrode, and the probe of the flame detection electrode to pass through.

[0028] In this embodiment, the flame outlet is conical. The conical flame outlet 141 makes the flame more concentrated.

[0029] In this embodiment, a flame arrester 131 is connected to the hydrogen-oxygen pipe to prevent backfire and further improve safety.

[0030] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0031] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0032] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0033] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A structure for a natural gas hydrogen-oxygen negative pressure mixer, characterized in that: It includes a mounting base, an ignition device, a gas pipe, a hydrogen-oxygen pipe, and a combustion-supporting air duct. The gas pipe and the hydrogen-oxygen pipe are located inside the combustion-supporting air duct. A flame outlet is provided at the front end of the combustion-supporting air duct. The front end of the hydrogen-oxygen pipe is connected to the middle section of the gas pipe through a jet mixer. The front end of the gas pipe is closed and has gas outlet holes distributed around its perimeter. The front end of the gas pipe extends to the flame outlet.

2. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 1, characterized in that: The jet mixer includes a nozzle and a mixing tube fitted on the nozzle. The mixing tube has a negative pressure suction chamber, a contraction inlet, a mixing throat, and a diffusion outlet arranged sequentially from back to front. The nozzle has a conical nozzle located in the middle of the negative pressure suction chamber at the front. The mixing tube has an suction port communicating with the negative pressure suction chamber at the rear side.

3. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 1, characterized in that: The rear ends of the gas pipe and the hydrogen-oxygen pipe are connected to a fixed base, and the fixed base has a gas inlet connected to the gas pipe and a hydrogen-oxygen inlet connected to the hydrogen-oxygen pipe.

4. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 1, characterized in that: The fixed base is provided with a first flange at the front, and the combustion air duct is provided with a second flange at the rear end that is connected to the first flange. An air inlet is provided on the side of the rear end of the combustion air duct.

5. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 4, characterized in that: The combustion-supporting air duct is fixedly connected to a flange located in front of the air inlet.

6. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 1, characterized in that: The combustion-supporting air duct is equipped with an air outlet plate near the flame outlet. The air outlet plate has several air outlet holes and several inclined swirl grooves that run through both sides of the air outlet plate.

7. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 1, characterized in that: The ignition device includes an ignition electrode connected to a fixed base, and the probe of the ignition electrode extends to the flame outlet.

8. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 7, characterized in that: The mounting base is also connected to a flame detection electrode, and the probe of the flame detection electrode extends to the flame outlet.

9. The structure of the natural gas hydrogen-oxygen negative pressure mixer according to claim 1, characterized in that: The flame outlet is cone-shaped.

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