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低氮燃烧器和普通燃烧器的区别有哪些？

发布时间：

2022-12-20 18:00

来源：

作者：

低氮燃烧器是一款在普通燃烧器基础之上，通过技术上的优化，达到氮氧化合物降低的一种燃烧器总称。从本质上来说，低氮燃烧器采用了对燃烧过程进行管控的一种技术提升。在设计时，除了考虑实现功率输出及材料耐温等方面因素之外，针对低氮需求，会采用各种方法减弱各生成因素的影响，从而实现较低的NOx排放值，例如：

1、通过分级、分段、浓淡型配合等方式，使燃烧在局部空间及某一阶段内，空气、燃气配比偏离化学当量比，可有效控制局部火焰温度，从而减少热力型NOx的产生；

2、通过提高混合效果的方式，如预混燃烧，当空气与燃气混合效果越好时，可大程度减薄高温区的火焰厚度，并降低烟气在较高温区的行程距离及停留时间，从而减少热力型NOx的产生；

3、通过烟气再循环的方式，利用燃烧烟气进行回流掺混，降低烟气中的氧含量，过量的N2及燃烧产物也会降低火焰温度，从而抑制NOx的产生，这是目前在锅炉上较为常用的方式之一；

4、通过分割火焰区域，提升避免火焰过于集中的产生，降低反应停留时间；

按照以上降低Nox的方法，低氮燃烧器大致分为以下几类:阶段燃烧器、自身再循环燃烧器、浓淡型燃烧器、分割火焰型燃烧器、混合促进型燃烧器、低NOx预燃室燃烧器等。

低氮燃烧器跟普通燃烧器的区别在于以下三点：
1、增强锅炉传热性能，提高热效率，降低锅炉运行成本，减少支出；
2、新购锅炉周期长，时间等待长，影响生产，而低氮改造则只需要短时间的施工即可完成改造，节约时间：
3、低氮改造符合国家环保政策，是利国利民的优选。

What are the differences between low nitrogen burner and ordinary burner？

Low nitrogen burner is a general name of burner that can reduce nitrogen oxides based on ordinary burner and through technical optimization. In essence, the low nitrogen burner adopts a technology improvement to control the combustion process. In addition to factors such as power output and material temperature resistance, various methods will be adopted to reduce the impact of various generation factors for low nitrogen demand, so as to achieve a lower NOx emission value, such as:

1. By means of grading, segmentation, and concentration dilution, the ratio of air and gas deviates from the chemical equivalent ratio in local space and at a certain stage of combustion, which can effectively control the local flame temperature, thereby reducing the generation of thermal NOx;

2. By means of improving the mixing effect, such as premixed combustion, when the mixing effect of air and gas is better, the flame thickness in the high temperature zone can be minimized, and the travel distance and residence time of flue gas in the high temperature zone can be reduced, thus reducing the generation of thermal NOx;

3. By means of flue gas recirculation, the combustion flue gas is used for backflow mixing to reduce the oxygen content in the flue gas. Excess N2 and combustion products will also reduce the maximum flame temperature, thus inhibiting the generation of NOx, which is one of the more common methods in boilers at present;

4. By dividing the flame area, improve to avoid the generation of too concentrated flame, and reduce the reaction residence time;

According to the above methods of NOx reduction, low nitrogen burners are roughly divided into the following categories: stage burners, self recirculation burners, rich and lean burners, split flame burners, mixing promotion burners, low NOx precombustion chamber burners, etc.

The difference between low nitrogen burner and ordinary burner lies in the following three points:

1. Enhance the heat transfer performance of the boiler, improve the thermal efficiency, reduce the operating cost of the boiler and reduce expenditure;

2. The cycle of newly purchased boiler is long and the waiting time is long, which affects the production, while the low nitrogen transformation can be completed in a short period of time, saving time:

3. Low nitrogen transformation conforms to the national environmental protection policy and is the first choice for the benefit of the country and the people.

关键词：

燃烧器,低氮燃烧器, 回转窑燃烧器,燃烧机厂家