摘要
基于双色法原理,以质量分数分别为0、10%、30%的催化油浆和柴油的混合油浆为燃料,构建了不同油浆在氧碳比(物质的量之比,下同)分别为0.8、0.9、1.0、1.1、1.2时的非预混合火焰温度场和碳烟浓度场,同时基于喷嘴火焰截面为圆形的假设,求取火焰体积浓度场。结果表明火焰分为焰心富氧燃烧区域、内焰贫氧燃烧区域和外焰接触空气的燃烧区域;焰心和外焰的温度较高,内焰温度较低;碳烟在内焰和外焰中较多,且在内焰中最多;在焰心至内焰过渡区域,温度下降,碳烟浓度上升;在内焰至外焰过渡区域,氧气浓度升高,温度上升,碳烟浓度降低;油浆中催化油浆含量越多,混合油浆在相同的氧碳比时产生碳烟量越多;混合油浆燃烧氧碳比升高时,火焰温度升高,碳烟浓度下降。
Based on the principle of two-color method,the mixed oil slurry of fluid catalytic cracing slurry and diesel fuel are used as fuel,where fluid catalytic cracing slurry mass concentration is 0,10%,30%,respectively.The non-premixed flame temperature field and soot concentration field of different oil slurry are constructed at molar ratio of oxygen to carbon of 0.8,0.9,1.0,1.1,1.2,respectively.From the hypothesis based on the fact that the nozzle flame section is circular,the percentage of soot volume per unit of flame volume is obtained.Studies have shown that the flame can be divided into flame core(oxygen-rich combustion zone),inner flame(oxygen-poor combustion zone),outer flame.The flame core and outer flame have a higher temperature and the temperature of the inner flame is lower.The soot is more in the inner and outer flame and is the most in the inner flame.In the transition from the flame core to the inner flame,the temperature decreases and the soot concentration rises.In the transition zone from the inner flame to the outer flame,the oxygen concentration increases,the temperature rises,and the soot concentration decreases.The more the catalytic slurry content in the slurry,the more soot is produced when the slurry contains the same ratio of oxygen to carbon.When the oxygen-carbon ratio of the slurry is increased,the flame temperature rises and the soot concentration decreases.
作者
代正华
孟凯
郭庆华
许建良
王辅臣
DAI Zhenghua;MENG Kai;GUO Qinghua;XU Jianliang;WANG Fuchen(Shanghai Engineering Research Center of Coal Gasification,School of Resources and Environment Engineering,East China University of Science and Technology,Shanghai 200237,China)
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第3期319-325,共7页
Journal of East China University of Science and Technology
基金
国家重点研发计划(2018YFC0808501)
国家自然科学基金(21776087)。
关键词
双色法
非预混合火焰
火焰温度
碳烟浓度
two-color method
non-premixed flame
flame temperature
soot concentration
