低氮燃燒器的常見6種分類（二）

4分割火焰型燃燒器

其原理是把一個火焰分成數個小火焰，由于小火焰散熱面積大，火焰溫度較低，使“熱反應NO”有所下降。此外，火焰小縮短了氧、氮等氣體在火焰中的停留時間，對“熱反應NO”和“燃料NO”都有明顯的抑制作用。

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混合促進型燃燒器

煙氣在高溫區停留時間是影響NOx生成量的主要因素之一，改善燃燒與空氣的混合，能夠使火焰面的厚度減薄，在燃燒負荷不變的情況下，煙氣在火焰面即高溫區內停留時間縮短，因而使NOx的生成量降低?；旌洗龠M型燃燒器就是按照這種原理設計的。

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預燃室燃燒器

預燃室是近10年來我國開發研究的一種高效率、低NOx分級燃燒技術，預燃室一般由一次風(或二次風)和燃料噴射系統等組成，燃料和一次風快速混合，在預燃室內一次燃燒區形成富燃料混合物，由于缺氧，只是部分燃料進行燃燒，燃料在貧氧和火焰溫度較低的一次火焰區內析出揮發分，因此減少了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.