N_(2)和CO_(2)稀释下的非预混甲烷燃烧特性  

Combustion characteristics of non-premixed methane under N_(2) and CO_(2) dilution

作　　者：刘冰[1] 王珂 王城景 张引弟[1,2] LIU Bing;WANG Ke;WANG Chengjing;ZHANG Yindi(School of Petroleum Engineering, Yangtze University, Wuhan 430100, China;Black Carbon Metrology Research Group, National Research Council, Ottawa K1AOR6, Canada)

机构地区：[1]长江大学石油工程学院,武汉430100 [2]加拿大国家研究院测量科学与标准研究中心,加拿大渥太华K1AOR6

出　　处：《中国科技论文》2022年第1期46-54,共9页China Sciencepaper

基　　金：国家自然科学基金资助项目(51974033);国家留学基金资助项目(201708420106)。

摘　　要：为研究N_(2)、CO_(2)稀释下的非预混甲烷燃烧特性,以工业锅炉常用的小型圆筒燃烧器为研究对象,基于数值模拟研究2种不同稀释气(CO_(2)、N_(2))在不同稀释比(0、5%、10%、15%、20%、25%)工况下对天然气燃烧温度场、组分、燃料燃烧效率及主要污染物排放的影响规律。结果表明:随着2种稀释气体的加入,燃烧速率、最高温度逐渐降低,NO_(x)和碳烟(soot)排放总量也随之降低;圆筒燃烧器在5 mm半径燃料入口下的CO_(2)和N_(2)稀释极限稀释比分别为23%和34%,综合考虑稀释技术的经济成本和减排结果,2种稀释气体稀释率应控制在5%~10%。To study the combustion characteristics of non-premixed methane under N_(2) and CO_(2) dilution,taking the small cylindrical combustion chamber as the research object,the influence law of two kinds of different dilute gas(CO_(2),N_(2))on the temperature field,composition,fuel combustion efficiency and emission of main pollutants of natural gas under different dilution degree(0,5%,10%,15%,20%,25%)were studied based on the numerical simulation.The results show that with the addition of two kinds of dilution gases,the combustion rate and the maximum temperature decrease gradually,and the total emissions of NO_(x) and soot also decrease.In addition,the study finds that the limiting dilution ratios of CO_(2) and N_(2)are 23%and 34%,respectively,in the cylindrical combustion chamber with a fuel inlet with a radius of 5 mm.Considering the economic cost of the dilution technology and the emission reduction results,the dilution rates of the two kinds of dilution gases should be controlled between 5%-10%.

关 键 词：稀释气燃烧技术 燃烧特性 数值模拟 废气再循环 

分 类 号：TQ038[化学工程]