reburn

Orthogonal Experiment and Variance Analysis of the Natural Gas Reburn Technology

天然气再燃技术的正交实验与方差分析

The principle , feature and shortcoming of traditional natural gas reburn technology were introduced . The major application projects of natural gas reburn in the world were listed .

介绍了常规天然气再燃技术的原理、特点及缺点，列举了国外主要天然气再燃的应用项目。

The temperature of the reburn zone has obviously effect on NO reduction .

再燃区温度对再燃还原效果的影响较为明显。

A low volatile bituminous coal was used as reburn fuel .

利用一种低挥发分烟煤作为再燃燃料，在煤粉携带炉中进行了该种煤再燃还原NO的实验研究。

The reduction efficiency decrease with the increase of reburn fuel fraction .

随着再燃比的增加，NO的还原效率增大。

An experimental study on controlling CO and N_2O emission of boiler through pulverized coal reburn

煤粉再燃对锅炉CO及N2O排放控制的试验研究

There existed an optimum value ( 0.8-0.9 ) for reburn zone stoichiometric coefficient .

再燃区过量空气系数存在一个最佳值（0.8~0.9）；

The NOx reduction efficient increased with the increase of the reburn heat input and the reburn zone temperature .

脱氮效率随着再燃量的增加而增大，随着再燃区温度的增加而增大；

The release of C after 0.2s is strongly dependent on reburn fuel fraction and oxygen content .

再燃燃料比与氧量的改变主要影响0.2s后煤焦C的释放；

My work contains that the research of the influence of the amount and the diameter of reburn fuel to the emission of NOx ;

工作主要包括研究细粉再燃中再燃燃料量对NOx排放影响；再燃燃料粒径大小对NOx排放影响；

The results indicate the NO reduction rates are strongly dependent on the reaction time , the coal particle size and the reburn fuel fraction .

实验表明，再燃过程NO还原率随反应时间和再燃燃料比的增大而增大，随煤粉颗粒增大而减小。

The release characteristic of fuel-C , its impact on the NO reduction rate and burnout of reburn coal have been investigated .

研究了燃料C释放与NO还原效率间的关系。

The fuel-N release rate is sensitive to reburn zone oxygen content when the initial reburn zone oxygen content is less than 4 % .

再燃区初始氧量小于4%时，氧量改变对燃料N的释放速率影响显著。

Fuel-staging combustion is an effective deNOx technology . Two forms of this technology are studied in this article : Reburn and New three-zone technology .

燃料分级燃烧技术是有效的低NOx燃烧技术，本文研究其两种方式：细粉再燃和新三区燃烧技术。

It is found that CO and N_2O reductions increased with increase in the reburn fuel fraction and decrease in the reburn zone excess air ratio .

试验发现，随再燃比的增加和再燃区过量空气系数的减少，CO和N2O的脱除效果增强；过高或过低的一级燃烧区过量空气系数均不利于CO的脱除；

Researchers have been study the NOx reduction efficiency and mechanism of air-stage , LNE ( Low NOx Emission ) burners and fuel reburn combustion technology .

研究者对空气分级、低NOx燃烧器、燃料再燃技术等脱除NOx的效果和机理进行了详细的研究。

The factors that impact the reburning effectiveness are analyzed , such as the natural gas percentage of boiler heat input , air stoichiometry , reburn zone temperature and residence time etc.

研究分析了天然气再燃效果的影响因素：包括天然气投入的比例、空气的化学当量比、再燃区的温度、烟气在再燃区的停留时间等。

Since the pulverized coal reburn technique can simultaneously reduce CO and N_2O emissions , it is possible to further develop this technique to control multiple pollutants from coal-fired boilers .

煤粉炉应用煤粉再燃技术可以实现CO和N2O的同时脱除，因而可开发该技术在燃煤锅炉中的多种污染物联合控制能力。

However , the mature natural gas reburn technology gives a perfect effect of NO X reduction with less investment and little secondary pollution . This technology will be widely used in the future with abundant natural gas reserve in our country and with the improvement of environmental requirement .

天然气再燃技术降NOX效果好，技术成熟，投资较少，无二次污染，我国的天然气储备丰富，随着环保要求的提高，该技术将得到广泛的应用。

By using the FLUENT software , the problems of turbulent flow , heat transfer , combustion and the generation of pollutants are calculated . The influence to the NOx emission of boiler by different combustion methods like Reburn and New three-zone technology is studied in this article .

本文主要应用FLUENT计算软件，对锅炉炉内的湍流流动、传热、燃烧和污染物生成进行总体的数值模拟，研究细粉再燃和新三区等燃烧方式对锅炉氮氧化排放量的影响。