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低氮燃烧器的种类分类

时间:2018-08-03 11:09    作者:admin 返回列表

低氮燃烧器作为工业上常用的一种燃烧器,而根据低氮燃烧器的不同的使用原理将其分为六个种类,以方便客户的使用。
The low nitrogen burner is used as a common type of burner in industry, and it is divided into six kinds according to the different use principle of low nitrogen burner to facilitate the use of customers.
1.阶段低氮燃烧器 根据分级燃烧原理设计的阶段燃烧器,使燃料与空气分段混合燃烧,由于燃烧偏离理论当量比,故可降低NOx的生成。
In the 1. stage low nitrogen burner, a stage burner designed according to the principle of graded combustion is designed to mix fuel and air in a piecewise mixture. Because of the deviation of the theoretical equivalent ratio of combustion, the generation of NOx can be reduced.
2.自身再循环低氮燃烧器 一种是利用助燃空气的压头,把部分燃烧烟气吸回,进入燃烧器,与空气混合燃烧。由于烟气再循环,燃烧烟气的热容量大,燃烧温度降低,NOx减少。另一种自身再循环燃烧器是把部分烟气直接在燃烧器内进入再循环,并加入燃烧过程,此种燃烧器有抑制氧化氮和节能双重效果。
2. Self-recirculating low-nitrogen burner is a kind of burner which uses the pressure head of combustion-supporting air to suck part of the burning flue gas back into the burner and mix it with air. Because of the flue gas recirculation, the heat capacity of the combustion flue gas is large, the combustion temperature is reduced, and the NOx decreases. Another kind of self recirculating burner is to recirculate part of the flue gas directly in the burner and add the combustion process. This kind of burner has the double effect of reducing nitrogen oxide and energy saving.
3.浓淡型低氮燃烧器 其原理是使一部分燃料作过浓燃烧,另一部分燃料作过淡燃烧,但整体上空气量保持不变。由于两部分都在偏离化学当量比下燃烧,因而NOx都很低,这种燃烧又称为偏离燃烧或非化学当量燃烧。
3. The principle of the dense-lean low-nitrogen burner is to make some of the fuels burn excessively dense and some of the fuels burn excessively light, but the overall air volume remains unchanged. Because both parts are burned at a deviation from the chemical equivalence ratio, NOx is very low. This combustion is also called deviation combustion or non-chemical equivalence combustion.
4.分割火焰型低氮燃烧器 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。

The principle of the 4. division flame type low nitrogen burner is to divide a flame into several small flames. Because of the large heat dissipation area and low flame temperature, the "thermal reaction NO" is reduced. In addition, small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and inhibits the "thermal reaction NO" and "fuel NO" obviously.


低氮燃烧器


5.混合促进型低氮燃烧器 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。
The residence time of the 5. mixed promoted low nitrogen burner flue gas in the high temperature zone is one of the main factors affecting the production of NOx. The improvement of the mixing of combustion and air can reduce the thickness of the flame surface. When the burning load is constant, the flue gas is shortened in the flame surface, which is in the high temperature area, thus reducing the production of the NOx. . The mixing and boosting burner is designed according to this principle.
6.低NOx预燃室低氮燃烧器 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 combustion chamber low nitrogen burner pre combustion chamber is a high efficiency and low NOx classification 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. The fuel and primary air mixture is quickly mixed, and the fuel mixture is formed in the first combustion chamber in the pre combustion chamber. In the case of anoxia, only part of the fuel is burned, and volatiles are released from the fuel in the primary flame zone where the oxygen is poor and the flame temperature is low, thus reducing the formation of NOx.
不同的低氮燃烧器可在工业上的不同领域发挥重要作用,请在购买时根据不用的使用方式来进行低氮燃烧器的购买。
Different low nitrogen burners can play an important role in different fields of industry. Please purchase the low nitrogen burner according to the use of the low nitrogen burner at the time of purchase.
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