低氮燃烧器的常见6种分类（二）

4分割火焰型燃烧器

其原理是把一个火焰分成数个小火焰，由于小火焰散热面积大，火焰温度较低，使“热反应NO”有所下降。此外，火焰小缩短了氧、氮等气体在火焰中的停留时间，对“热反应NO”和“燃料NO”都有明显的抑制作用。

4 split flame burner

The principle is to divide a flame into several small flames. Due to the large heat dissipation area and low flame temperature, the "thermal reaction NO" decreases. In addition, the flame shortens the residence time of oxygen and nitrogen in the flame, and obviously inhibits the "thermal reaction NO" and "fuel NO".

5混合促进型燃烧器

烟气在高温区停留时间是影响NOx生成量的主要因素之一，改善燃烧与空气的混合，能够使火焰面的厚度减薄，在燃烧负荷不变的情况下，烟气在火焰面即高温区内停留时间缩短，因而使NOx的生成量降低。混合促进型燃烧器就是按照这种原理设计的。

5 mixed promotion burner

The retention time of flue gas in the high temperature zone is one of the main factors that affect the production of NOx. Improving the mixing of combustion and air can reduce the thickness of the flame surface. In the case of constant combustion load, the retention time of the flue gas in the flame surface is shortened, thus the generation of NOx is reduced. The mixing and boosting burner is designed according to this principle.

6低NOx预燃室燃烧器

预燃室是近10年来我国开发研究的一种高效率、低NOx分级燃烧技术，预燃室一般由一次风(或二次风)和燃料喷射系统等组成，燃料和一次风快速混合，在预燃室内一次燃烧区形成富燃料混合物，由于缺氧，只是部分燃料进行燃烧，燃料在贫氧和火焰温度较低的一次火焰区内析出挥发分，因此减少了NOx的生成。

6 low NOx pre combustor burner

The pre combustion chamber is a high efficiency and low NOx grade combustion technology developed and studied in China in the past 10 years. The pre combustion chamber is usually composed of primary air (or two air) and fuel injection system. Fuel and primary air are mixed rapidly. A fuel mixture is formed in a combustion zone in the pre combustion chamber. Due to oxygen, only some fuel is burned. The volatilization of fuel in the primary flame area with low oxygen and low flame temperature reduced the formation of NOx.