Boiler fuel mixing device with flow equalizing function

Abstract

The boiler fuel mixing device with the flow equalizing function is composed of the air-fuel mixing pipe, the fuel gas inlet pipe, the reducing cavity, the rectangular pipe, the flow equalizing plate and the static pressure box, and the air-fuel mixing pipe, the fuel gas inlet pipe and the flow equalizing plate are used for improving the mixing uniformity of fuel gas and air; and the generation of an incomplete combustion product-nitrogen oxide is reduced, so that the pollution severity of the flue gas to the atmosphere is reduced, the possibility of detonation is reduced, and the safety and stability of the boiler are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, and is particularly suitable for the manufacturing technology of low-nitrogen premixed boilers. Background Art

[0002] Compared with coal and oil, gas fuel is a higher quality, more efficient and cleaner boiler fuel. It has a relatively low ignition temperature, fast flame propagation speed, fast combustion speed, and is easier to achieve automatic gas transmission, mixing and combustion processes. Therefore, it is widely used in the field of gas boiler technology.

[0003] However, traditional gas boiler burners use a flame combustion approach. Due to the poor mixing effect of gas and air, the temperature distribution in the furnace is uneven, resulting in a high content of incomplete combustion products - nitrogen oxides. Not only is the combustion heat low, but it also causes serious pollution to the atmosphere. In addition, due to the poor mixing effect of gas and air, the safety and stability of the boiler are low, which can easily cause boiler explosion accidents.

[0004] The utility model utilizes a fuel mixing structure and a flow equalizing plate to enhance the mixing effect of gas and air, reduce the content of nitrogen oxides, a product of incomplete combustion, reduce air pollution, reduce the possibility of deflagration, and improve the safety and stability of the boiler. Summary of the invention

[0005] To solve the above problems, the utility model proposes a boiler fuel mixing device with flow balancing function, which consists of an air-fuel mixing pipe 1, a gas intake pipe 2, a variable diameter cavity 3, a rectangular pipe 4, a flow balancing plate 5 and a static pressure box 6.

[0006] Furthermore, the connection relationship of the device is as follows: the gas intake pipe 2 is connected to the air-fuel mixing pipe 1, the outlet center of the gas intake pipe 2 is aligned with the center of the fuel mixing pipe 1, the air-fuel mixing pipe 1 is connected to the variable diameter cavity 3, the variable diameter cavity 3 is connected to the rectangular tube 4, the rectangular tube 4 is connected to the flow equalizing plate 5, and the flow equalizing plate 5 is connected to the static pressure box 6.

[0007] Furthermore, a plurality of gas outlet holes are opened on the outer side of the gas inlet pipe 2, and the air-fuel mixing pipe 1 and the gas inlet pipe 2 form a fuel mixing structure.

[0008] Furthermore, the flow balancing plate 5 is composed of a flow balancing orifice plate 1 51 and a flow balancing orifice plate 2 52 forming an angle of 60° to 180°, and the flow balancing orifice plate 1 51 and the flow balancing orifice plate 2 52 both have a plurality of flow balancing holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1This is a detailed diagram of a boiler fuel mixing device with a flow balancing function proposed by the utility model, in which the serial numbers are: 1-air-fuel mixing pipe, 2-gas inlet pipe, 3-variable cavity, 4-rectangular tube, 5-flow balancing plate, 6-static pressure box.

[0010] Figure 2 It is a detailed view of the gas intake pipe 2.

[0011] Figure 3 This is a detailed diagram of 5-flow balancing plate, in which the serial numbers are: 51-flow balancing orifice plate one, 52-flow balancing orifice plate two.

[0012] Figure 4 This is a system diagram of an embodiment of a boiler fuel mixing device with flow balancing function described in the utility model. DETAILED DESCRIPTION

[0013] In conjunction with the above drawings, the specific implementation of the boiler fuel mixing device with flow balancing function described in the present invention is described as follows.

[0014] In conjunction with Figures 1, 2 and 3, the gas intake pipe 2 is connected to the air-fuel mixing pipe 1, the outlet center of the gas intake pipe 2 is aligned with the center of the fuel mixing pipe 1, the air-fuel mixing pipe 1 is connected to the variable diameter cavity 3, the variable diameter cavity 3 is connected to the rectangular tube 4, the rectangular tube 4 is connected to the flow equalizing plate 5, the flow equalizing plate 5 is connected to the static pressure box 6, the air-fuel mixing pipe 1 and the gas intake pipe 2 form a fuel mixing structure, which has the function of mixing air and gas, and the air and gas can be fully mixed through turbulence. The flow equalizing plate 5 is composed of a flow equalizing orifice plate 1 51 and a flow equalizing orifice plate 2 52 at an angle of 60° to 180°, and the flow equalizing plate 5 has a better flow equalization and mixing function.

[0015] In conjunction with Figure 4, a system diagram of an application example of the boiler fuel mixing device with flow balancing described in the utility model, the gas intake pipe 2 is connected to the air-fuel mixing pipe 1, and air is sent into the air-fuel mixing pipe 1 through the fan. The air is evenly mixed with the gas coming in from the gas intake pipe 2 under the action of turbulence. The air-fuel mixing pipe 1 is connected to the variable diameter cavity 3, and the mixed gas enters the variable diameter cavity 3 through the air-fuel mixing pipe 1. The variable diameter cavity 3 is connected to the rectangular tube 4. The mixed gas enters the rectangular tube 4 through the variable diameter cavity 3. The rectangular tube 4 is connected to the flow balancing plate 5, and the flow balancing plate 5 is connected to the static pressure box 6. The gas enters the flow balancing plate 5 through the rectangular tube 4, and enters the static pressure box 6 under the action of flow balancing for secondary mixing. The static pressure box 6 is connected to the boiler furnace, and enters the boiler furnace under the action of the static pressure box 6 for combustion.

[0016] The boiler fuel mixing device with flow balancing function described in the utility model can increase the mixing effect of gas and air and the uniformity of gas distribution entering the boiler furnace, reduce the content of incomplete combustion products - nitrogen oxides, and thus reduce air pollution. Secondly, due to the good mixing effect of gas and air, the possibility of deflagration is reduced, the safety and stability of the boiler are improved, and the working efficiency of the boiler is further improved.

[0017] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present disclosure is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) to form a technical solution.

Claims

1. A boiler fuel mixing device with a flow balancing function, comprising an air-fuel mixing pipe (1), a gas inlet pipe (2), a variable diameter cavity (3), a rectangular tube (4), a flow balancing plate (5) and a static pressure box (6), characterized in that: The air-fuel mixing pipe (1) is connected to the gas inlet pipe (2), the outlet center of the gas inlet pipe (2) is aligned with the center of the fuel mixing pipe (1), the air-fuel mixing pipe (1) is connected to the variable diameter cavity (3), the variable diameter cavity (3) is connected to the rectangular tube (4), the rectangular tube (4) is connected to the flow equalizing plate (5), and the flow equalizing plate (5) is connected to the static pressure box (6).

2. The boiler fuel mixing device with flow balancing function according to claim 1, characterized in that: A plurality of gas outlet holes are opened on the outside of the gas inlet pipe (2), and the air-fuel mixing pipe (1) and the gas inlet pipe (2) form a fuel mixing structure.

3. The boiler fuel mixing device with flow balancing function according to claim 1, characterized in that: The flow balancing plate (5) is composed of a flow balancing orifice plate 1 (51) and a flow balancing orifice plate 2 (52) at an angle of 60° to 180°. Both the flow balancing orifice plate 1 (51) and the flow balancing orifice plate 2 (52) have a plurality of flow balancing holes.

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