阅读说明：本技术 一种低NOx排放转炉煤气燃烧器 (Converter gas burner with low NOx emission ) 是由 程达品 周勇 袁媛 陆成 罗飞 于 2019-09-02 设计创作，主要内容包括：本发明公开了一种低NOx排放转炉煤气燃烧器,包括从燃烧器的中心轴线依次向外同轴设置的点火枪通道、中心空气通道、燃气通道和外层空气通道,喷口与外层空气通道的外环面连接并往炉膛方向延伸,所述中心空气通道出口处环向设置多个中心旋流叶片,燃气通道在出口处分隔为内外两个环形空间,在内环形空间出口处设置有前面板,前面板上环向设置多个倾斜的燃气喷孔,在外环形空间内环向设置多个燃气旋流叶片,外层空气通道出口处环向设置多个外旋流叶片。本发明采用合理的结构,使燃气和助燃空气在中心区和外层均能充分均匀混合,利用火焰分割降低了火焰温度,避免了局部高温区的出现,抑制了NOx的形成,实现了低NOx排放的目的。(The invention discloses a converter gas burner with low NOx emission, which comprises an ignition gun channel, a central air channel, a gas channel and an outer layer air channel which are coaxially arranged from the central axis of the burner to the outside in sequence, wherein a nozzle is connected with the outer ring surface of the outer layer air channel and extends towards the direction of a hearth, a plurality of central rotational flow blades are annularly arranged at the outlet of the central air channel, the gas channel is divided into an inner annular space and an outer annular space at the outlet, a front panel is arranged at the outlet of the inner annular space, a plurality of inclined gas spray holes are annularly arranged on the front panel, a plurality of gas rotational flow blades are annularly arranged in the outer annular space, and a plurality of outer rotational flow blades are annularly arranged at the outlet of the outer. The invention adopts a reasonable structure, so that the fuel gas and the combustion air can be fully and uniformly mixed in the central area and the outer layer, the flame temperature is reduced by utilizing flame division, the occurrence of a local high-temperature area is avoided, the formation of NOx is inhibited, and the aim of low NOx emission is fulfilled.)

1. A converter gas burner with low NOx emission comprises an ignition gun channel, a central air channel, a gas channel, an outer layer air channel and a nozzle, and is characterized in that: the ignition gun comprises an ignition gun channel, a central air channel, a gas channel and an outer air channel, wherein the ignition gun channel, the central air channel, the gas channel and the outer air channel are sequentially and coaxially arranged from the central axis of a combustor, a nozzle is connected with the outer annular surface of the outer air channel and extends towards the direction of a hearth, a plurality of central rotational flow blades are annularly arranged at the outlet of the central air channel, the gas channel is divided into an inner annular space and an outer annular space at the outlet, a front panel is arranged at the outlet of the inner annular space, a plurality of inclined gas spray holes are annularly arranged on the front panel, a plurality of gas rotational flow blades are annularly arranged in the outer annular space, and a plurality of.

2. The low NOx emissions converter gas burner of claim 1, wherein: the nozzle is a contraction type conical cylinder, and the contraction angle is 3-8 degrees.

3. The low NOx emissions converter gas burner of claim 1, wherein: the gas orifice sets up 1 ~ 2 layers along the hoop, the gas orifice is the round hole or other special-shaped holes.

4. The low NOx emissions converter gas burner of claim 1, wherein: the gas orifice is inwards inclined and forms an included angle of 5-10 degrees with the axis.

5. The low NOx emissions converter gas burner of claim 1, wherein: the rotational flow direction of the gas rotational flow blade is opposite to that of the outer rotational flow blade.

Technical Field

The invention relates to the technical field of clean combustion of industrial gas, in particular to a converter gas burner with low NOx emission.

Background

Converter gas is a byproduct of a steel making process of a steel enterprise, has a large production amount, contains a large amount of harmful substances such as CO, nitrogen elements and the like, and cannot be directly discharged into the atmosphere. Meanwhile, converter gas is a gas fuel with medium heat value and can be used as a fuel of an industrial boiler. High-temperature flame is generated in the combustion process of converter gas, and N in the air₂And nitrogen element in the coal gas is easy to form pollutant-nitrogen oxide NOx at high temperature. The existing converter gas burner is easy to form local overtemperature due to large gas quantity and uneven mixing with combustion air, so that NOx is generated, and increasingly strict emission requirements cannot be met. Therefore, the development of the low-NOx-emission gas burner suitable for the converter gas has great significance for reasonably utilizing the converter gas, reducing the cost of the iron and steel enterprises and assisting the iron and steel enterprises in realizing the aims of energy conservation and emission reduction.

Disclosure of Invention

The invention aims to provide a converter gas burner with low NOx emission, which solves the problems that the gas and air of the existing converter gas burner are not uniformly mixed and a local high-temperature area is easily generated, and reduces the generation amount of NOx in the combustion process.

The invention adopts the following technical scheme:

a converter gas burner with low NOx emission comprises an ignition gun channel, a central air channel, a gas channel, an outer air channel and a nozzle, and is characterized in that the ignition gun channel, the central air channel, the gas channel and the outer air channel are sequentially and coaxially arranged from the central axis of the burner, the nozzle is connected with the outer annular surface of the outer air channel and extends towards the direction of a hearth, a plurality of central rotational flow blades are annularly arranged at the outlet of the central air channel, the gas channel is divided into an inner annular space and an outer annular space at the outlet, a front panel is arranged at the outlet of the inner annular space, a plurality of inclined gas spray holes are annularly arranged on the front panel, a plurality of gas rotational flow blades are annularly arranged in the outer annular space, and a plurality of outer rotational flow blades are annularly arranged at the outlet of the outer air channel.

Preferably, the nozzle is a contraction type conical cylinder, and the contraction angle is 3-8 degrees.

Preferably, the gas jet holes are arranged in 1-2 layers along the circumferential direction.

Preferably, the gas jet holes are round holes or other special-shaped holes.

Preferably, the gas jet holes are inclined inwards, and the included angle between the gas jet holes and the axis is 5-10 degrees.

Preferably, the swirling direction of the gas swirling vanes is opposite to that of the outer swirling vanes.

The invention has the beneficial effects that:

(1) the gas is sprayed out through the plurality of gas spray holes and is mixed with the air flowing out from the central air channel and the outer layer air channel to form a plurality of strands of small flames for combustion, so that the heat load concentration is avoided, the flame temperature is favorably reduced, and the formation of NOx is inhibited.

(2) The rotational flow directions of the gas rotational flow blades and the outer rotational flow blades are opposite, so that the full and uniform mixed combustion of gas and combustion air is facilitated, the generation of a local high-temperature area is avoided, and the formation of NOx is inhibited.

(3) The invention has simple structure and is easy to process and install.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a partial enlarged view of portion I of FIG. 2;

FIG. 4 is a schematic view of the overall structure of embodiment 2 of the present invention;

FIG. 5 is a sectional view taken in the direction B-B in FIG. 4;

fig. 6 is a partially enlarged view of a portion II in fig. 5.

In the figure: 1. the gas-fired ignition gun comprises a central cyclone blade, 2, a gas spray hole, 3, a front panel, 4, a gas cyclone blade, 5, a nozzle, 6, an outer cyclone blade, 7, a gas channel, 8, an outer air channel, 9, a central air channel, 10 and an ignition gun channel.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings: