A fuel mixer for a boiler

Abstract

The utility model provides a kind of fuel mixer for boiler, including mixing shell, gas guide connector and spoiler device being arranged in mixing shell, the bottom of the mixing shell is equipped with air inlet, and the top is equipped with mixed gas outlet, the lateral wall of the mixing shell is equipped with natural gas inlet;The gas guide connector is arranged in mixing shell and is communicated with natural gas inlet, and the inner wall of gas guide connector is equipped with multiple uniformly distributed guide holes;The spoiler device is fixed in the upper end inside mixing shell, and multiple spoiler blades are equipped on the spoiler device;The utility model is simple and compact in structure, through the arc structure design and multiple uniformly distributed guide holes of gas guide connector, combined with the spoiler blade on spoiler device, the mixing effect of natural gas and air can be significantly improved, the furnace burning efficiency is improved, and it is suitable for fuel mixing system of various industrial boilers.

Description

Technical Field

[0001] This utility model relates to the field of boiler combustion equipment technology, and in particular to a fuel mixer for boilers. Background Technology

[0002] Boilers are widely used in industrial production, and their fuel typically consists of clean energy sources such as natural gas. To achieve complete combustion, the fuel gas needs to be well mixed with air. Most existing fuel mixers employ simple structures, which may lead to incomplete mixing and affect the boiler's combustion efficiency. Therefore, developing a fuel mixer with good mixing performance and high safety is of great significance. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a fuel mixer for boilers that has good mixing effect, compact structure and is safe and reliable.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a fuel mixer for a boiler, comprising a mixing shell, a gas guide pipe disposed within the mixing shell, and a turbulence-disrupting assembly. The mixing shell has an air inlet at its bottom and a mixed gas outlet at its top. The side wall of the mixing shell has a natural gas inlet. The gas guide pipe is disposed within the mixing shell and communicates with the natural gas inlet. The inner wall of the gas guide pipe has multiple evenly distributed guide holes. The turbulence-disrupting assembly is fixed to the upper end inside the mixing shell and has multiple turbulence-disrupting blades.

[0005] Furthermore, the upper end of the gas guiding pipe has an arc-shaped structure, and the front end of the arc-shaped structure is concentric with the mixing shell.

[0006] Furthermore, the guide holes are evenly arranged along the axial direction of the gas guide pipe, with 5-8 guide holes in each row.

[0007] Furthermore, the number of guide holes is preferably 5.

[0008] Furthermore, the guide hole is located close to the inner wall cross-section.

[0009] Furthermore, the deflector blades are evenly arranged, and the tilt angle of the deflector blades is 0-90 degrees.

[0010] Furthermore, the angle is preferably 45 degrees.

[0011] Furthermore, the hybrid housing has a cylindrical structure with a diameter that matches the diameter of the fan's air inlet.

[0012] Advantages of the present utility model: Through the design of the guiding holes in the gas guiding connection pipe, the natural gas airflow can form a vortex, enhancing the mixing effect with air; the uniform arrangement of the guiding holes ensures that the natural gas can be ejected evenly at multiple points, increasing the contact area with air; the spoiler blades on the spoiler component can further enhance gas disturbance, making the mixing more sufficient; the overall structure is compact, easy to install, and has a good mixing effect, which can significantly improve the combustion efficiency of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. Figure 1 Shows an axonometric view of a fuel mixer according to an embodiment of the present disclosure.

[0014] FIG. Figure 2 Shows a schematic structural view of a fuel mixer according to an embodiment of the present disclosure.

[0015] FIG. Figure 3 Shows a schematic structural view of the gas guiding connection pipe of a fuel mixer according to an embodiment of the present disclosure.

[0016] FIG. Figure 4 Shows an A-A cross-sectional view of the gas guiding connection pipe of a fuel mixer according to an embodiment of the present disclosure.

[0017] In the figures, 1 - spoiler device, 2 - gas guiding connection pipe, 3 - mixing housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the drawings, so that those skilled in the art can easily implement them. In addition, for clarity, parts irrelevant to the description of the exemplary embodiments are omitted in the drawings.

[0019] Combined with the above drawings, the present utility model includes a mixing housing 3, a gas guiding connection pipe 2, and a spoiler component 1. The mixing housing 3 is a cylindrical structure, with an air inlet at the bottom, a mixed gas outlet at the top, and a natural gas inlet on the side wall. The gas guiding connection pipe 2 is arranged inside the mixing housing 3, and its upper end is in an arc shape, with the opening of the arc shape facing the mixed gas outlet. A plurality of guiding holes are uniformly arranged on the inner wall of the gas guiding connection pipe 2. The guiding holes are located near the inner wall tangent plane, which can make the natural gas airflow better form a vortex through the guiding holes, and the guiding holes are arranged along the axial direction.

[0020] The spoiler component 1 is fixed at the upper end inside the mixing housing 3, and uses spoiler blades arranged in a "cross" shape, with the inclination angle of the spoiler blades being 45 degrees. When air enters from the bottom, the spoiler blades can generate a strong swirling effect, promoting gas mixing.

[0021] During operation, air enters the mixing housing 3 from the bottom, and natural gas enters the gas guide pipe 2 from the side and is evenly injected through the guide holes. As the air rises, it mixes thoroughly with the injected natural gas. The mixed gas is further agitated and mixed when it passes through the turbulence component 1, and finally discharged from the top outlet.

[0022] In this embodiment, the diameter of the mixing shell 3 is 219 mm and the height is 400 mm; the diameter of the gas guide pipe 2 is 76 mm; the diameter of the guide hole is 14 mm; and the length of the baffle blade is 90 mm. These dimensions are exemplary and can be adjusted according to the actual boiler and fan dimensions.

[0023] In this embodiment, the air inlet side of the mixing shell 3 is connected to the fan outlet; the mixed gas outlet side of the mixing shell 3 is connected to the boiler combustion chamber inlet and fixed at the combustion chamber inlet. During operation, natural gas is ejected through multiple guide holes on the gas guide pipe 2. Because the guide holes are set close to the inner wall cross-section, together with the rising air at the bottom, a strong vortex effect can be formed in the mixing shell, thereby achieving uniform mixing. As a component of the boiler combustion system, the input of natural gas and air, natural gas filtration, and safety monitoring of this mixer can be achieved through the existing supporting pipelines and control facilities of the system. The focus of this invention is to optimize the turbulence and injection structure inside the mixer.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel mixer for a boiler, characterized in that: It includes a mixing housing (3), a gas guiding connection pipe (2) and a flow disturbing component (1) arranged inside the mixing housing (3). An air inlet is provided at the bottom of the mixing housing (3), a mixed gas outlet is provided at the top, and a natural gas inlet is provided on the side wall of the mixing housing (3); the gas guiding connection pipe (2) is arranged inside the mixing housing (3) and is connected to the natural gas inlet, and a plurality of uniformly distributed guiding holes are provided on the inner wall of the gas guiding connection pipe (2); the flow disturbing component (1) is fixed at the upper end inside the mixing housing (3), and a plurality of flow disturbing vanes are provided on the flow disturbing component (1).

2. The fuel mixer for a boiler according to claim 1, characterized in that: The upper end of the gas guiding connection pipe (2) is in an arc structure, and the opening of the arc structure faces the mixed gas outlet.

3. The fuel mixer for a boiler according to claim 1, characterized in that: The guiding holes are uniformly arranged along the axial direction of the gas guiding connection pipe (2), and 5 - 8 guiding holes are arranged in each row.

4. The fuel mixer for a boiler according to claim 1, characterized in that: The guiding holes are opened near the inner wall tangent plane.

5. The fuel mixer for a boiler according to claim 1, characterized in that: The flow disturbing vanes are arranged in a "rice" shape, and the inclination angle of the flow disturbing vanes is 30 - 60 degrees.

6. The fuel mixer for a boiler according to claim 5, characterized in that: The inclination angle of the flow disturbing vanes is 45 degrees.

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