Fuel gas split-flow type burner

Abstract

The utility model discloses a fuel gas split-flow type burner, which comprises a burner shell, a fuel gas inlet pipe and an air inlet pipe, and is characterized in that the fuel gas split-flow type burner is provided with a main fuel gas pipe and an auxiliary fuel gas pipe; a main nozzle is arranged at the top end of the main gas pipe; an auxiliary nozzle is arranged at the top of the auxiliary gas pipe; atomization holes are formed below the auxiliary gas pipe; an injection disc is arranged in the combustor, an injection hole is formed in the injection disc, and the injection disc is of a contraction-expansion type structure. An outer rotational flow fan is arranged on the outer side of the injection disc, matched with the inner rotational flow fan and opposite in rotation direction. According to the burner, fuel gas is shunted and sprayed out through the nozzle and the atomization holes, and the intensified mixing of the fuel gas and the air is achieved by combining the rotational flow and injection effects of the air.

Description

Technical Field

[0001] This utility model relates to the field of combustion technology, and in particular to a burner that splits gas flow and mixes it with air. Background Technology

[0002] With the increasing demand for "high efficiency, stability, and low emissions" in combustion, the fuels used for combustion have shifted from traditional fuels to clean energy sources such as natural gas. Traditional burners use a single-stream gas flow mixing structure with air, which results in limited contact area between gas and air, poor mixing effect, uneven combustion, and increased NOx and CO emissions. Therefore, designing a gas split-flow burner is particularly important.

[0003] This gas-split burner, after the gas enters the burner, divides the main gas into central gas and peripheral gas through a splitting structure and a multi-nozzle structure. This allows each gas stream to mix independently with air, increasing the contact area between the gas and air, improving combustion efficiency. At the same time, the dispersed flame reduces local high temperatures, thereby reducing emissions of NOx (nitrogen oxides) and CO (carbon monoxide), effectively reducing environmental pollution caused by incomplete combustion. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems by providing a gas split-flow burner that improves combustion efficiency and reduces the emission of harmful substances through the atomization and mixing of multiple gas streams with air.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a burner shell, a gas inlet pipe, an air inlet pipe, a gas guide hole, a secondary gas pipe, an inner swirl fan, an ejector hole, an outer swirl fan, an ejector plate, a secondary nozzle, a main nozzle, a main gas pipe, and an atomizing hole. The main gas pipe is cylindrical and has a main nozzle at its top. The secondary gas pipe is also cylindrical, with a secondary nozzle at its top frustum and an atomizing hole below the frustum. The ejector plate is annular, with ejector holes on it, and has a contraction-expansion structure with an outer swirl fan embedded in its outer ring.

[0006] The improvement of this utility model is that the main gas pipe is provided with a main nozzle at the top, and there are six auxiliary gas pipes arranged in a circumferential pattern. The top truncated cone is provided with an auxiliary nozzle, and there are atomizing holes arranged in a circumferential pattern below the truncated cone. The bottom ends are all welded to the gas guide hole.

[0007] The improvement of this utility model is that the air intake pipe is located at the center of the burner shell, and passes through the inner swirl fan, the ejector plate, and the outer swirl fan at the outlet end of the burner shell.

[0008] The improvement of this utility model is that the inner ring of the inner swirl fan is welded to the main gas pipe, and the outer ring of the inner swirl fan is welded to the inner ring of the ejector plate.

[0009] The improvement of this utility model is that the ejector plate has ejector holes arranged in a circumferential direction, and an outer swirl fan is embedded on the outer ring. The blades of the outer swirl fan are tangent to the inner wall of the burner shell. The ejector plate and the circumferentially distributed auxiliary gas pipes are concentrically matched and located below the atomizing holes.

[0010] The improvement of this utility model is that the blades of the inner swirling fan and the outer swirling fan are in opposite directions. The blades of the inner swirling fan gradually twist clockwise from the root to the top, while the blades of the outer swirling fan gradually twist counterclockwise from the root to the top.

[0011] This invention has significant advantages and positive effects. By diverting the combustion gas before it is ejected through an atomizing nozzle, and by mixing the air with the combustion gas in a swirling state after passing through an inner swirling fan, an outer swirling fan, and an ejector plate, combustion efficiency is improved, while the flame is dispersed to avoid localized high temperatures. It also has a significant impact on reducing NOx (nitrogen oxides) and CO (carbon monoxide) emissions, and is of great importance to improving combustion efficiency and environmental sustainability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the gas split-flow burner structure described in this utility model;

[0013] Figure 2 This is a schematic diagram of the ejector plate structure in the gas split burner of this utility model;

[0014] Figure 3 This is a schematic diagram of the main gas pipe structure in the gas split burner of this utility model;

[0015] Figure 4 This is a schematic diagram of the auxiliary gas pipe structure in the gas split burner of this utility model;

[0016] Figure 5 This is a schematic diagram of the internal swirl fan structure in the gas split burner of this utility model;

[0017] Figure 6 This is a schematic diagram of the gas and air intake pipe structure in the gas split burner of this utility model. Detailed Implementation

[0018] To better understand this utility model, it will be further described below with reference to the accompanying drawings. Figure 1As shown, a gas split-flow burner mainly includes a burner shell (1), a gas inlet pipe (2), an air inlet pipe (3), a gas guide hole (4), an auxiliary gas pipe (5), an inner swirl fan (6), an ejector hole (7), an outer swirl fan (8), an ejector plate (9), an auxiliary nozzle (10), a main nozzle (11), a main gas pipe (12), and an atomizing hole (13). The main gas pipe (12) is provided with a main nozzle (11) at the top and welded to the gas guide hole (4) at the bottom. The auxiliary gas pipe (5) is arranged in a circle, with an auxiliary nozzle (10) on the top truncated cone and atomizing holes (13) arranged in a circle below the truncated cone. The bottom is welded to the gas guide hole (4). The ejector plate (9) has ejector holes (7) arranged in a circle. It is a contraction-expansion type structure. The inner ring coincides with the inner swirl fan (6), and the outer ring is embedded with an outer swirl fan (8). The blades of the outer swirl fan (8) are tangent to the inner wall of the burner shell (1). The blades of the inner swirl fan (6) gradually twist clockwise from the root to the top, and the blades of the outer swirl fan (8) gradually twist counterclockwise from the root to the top.

[0019] When the gas enters from the gas inlet pipe (2), it enters the main gas pipe (12) and the circumferentially distributed auxiliary gas pipe (5). The gas pipe ends are respectively equipped with a main nozzle (11) and an auxiliary nozzle (10). The auxiliary gas pipe (5) has circumferentially arranged atomizing holes (13) below the truncated cone at the top. These are all small circular holes, which help to atomize the gas. When the air enters the burner from the air inlet pipe (3), the air flows towards the burner outlet due to the increased pressure inside the burner. It flows out after passing through the inner swirl fan (6) and the outer swirl fan (8). Since the blades of the inner swirl fan (6) and the outer swirl fan (8) rotate in opposite directions, two opposing airflows are generated, which can increase the turbulence intensity of the gas and help mix the air and gas. When the air passes through the ejector hole (7) on the ejector plate (9), the ejector hole (7) is a contraction-expansion type structure, which can eject the air to achieve efficient mixing of air and gas. Through the above mixing method, stable combustion of gas and low pollutant emissions can be ensured.

Claims

1. A gas split-flow burner, comprising a burner shell (1), a gas inlet pipe (2), an air inlet pipe (3), a gas guide hole (4), a secondary gas pipe (5), an inner swirl fan (6), an ejector hole (7), an outer swirl fan (8), an ejector plate (9), a secondary nozzle (10), a main nozzle (11), a main gas pipe (12), and an atomizing hole (13), characterized in that, The main gas pipe (12) is cylindrical and has a main nozzle (11) at the top. The auxiliary gas pipe (5) is cylindrical and has an auxiliary nozzle (10) at the top truncated cone and an atomizing hole (13) below the truncated cone. The ejector plate (9) is annular and has an ejector hole (7) on it. It is a contraction-expansion type structure with an outer swirl fan (8) embedded in the outer ring.

2. A gas split burner as claimed in claim 1, wherein The main gas pipe (12) has a main nozzle (11) at the top and six auxiliary gas pipes (5) arranged in a circumferential pattern. The top truncated cone has an auxiliary nozzle (10) and atomizing holes (13) arranged in a circumferential pattern below the truncated cone. The bottom ends are all welded to the gas guide hole (4).

3. A gas split burner as claimed in claim 1, wherein The air intake pipe (3) is located at the center of the burner housing (1), and passes through the inner swirl fan (6), the ejector plate (9), and the outer swirl fan (8) at the outlet end of the burner housing (1).

4. A gas split burner as claimed in claim 1, wherein The inner ring of the inner swirl fan (6) is welded to the main gas pipe (12), and the outer ring of the inner swirl fan (6) is welded to the inner ring of the ejector plate (9).

5. A gas split burner as claimed in claim 1, wherein, The ejector plate (9) has ejector holes (7) arranged in a circumferential direction, and an outer swirl fan (8) is embedded on the outer ring. The fan blades of the outer swirl fan (8) are tangent to the inner wall of the burner shell (1). The ejector plate (9) and the circumferentially distributed auxiliary gas pipe (5) are concentrically matched and located below the atomizing hole (13).

6. A gas split burner as claimed in claim 1, wherein The inner swirling fan (6) and the outer swirling fan (8) have opposite blade directions. The inner swirling fan (6) gradually twists clockwise from the root to the top of the blade, while the outer swirling fan (8) gradually twists counterclockwise from the root to the top of the blade.

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