摘要
为研究煤加压富氧燃烧及其污染物生成特性,建立了加压水平管式炉富氧燃烧实验系统.以山西浑源烟煤为实验原料,探究了不同燃烧压力(0.1～0.9 MPa)和不同气氛(空气以及O_2浓度分别为21%,26%,31%,36%,41%的O_2/CO_2气氛)对煤加压富氧燃烧过程的燃烧特性以及污染物生成的影响.结果显示,与空气燃烧相比,O_2/CO_2气氛下煤燃烧时间增加;随着O_2浓度的增加,煤燃烧时间缩短;升高反应压力,煤燃烧速率增大且增幅逐渐减小;随着反应压力的提高NO_x生成量逐渐减少,O_2/CO_2气氛下NO_x生成量小于空气气氛下NO_x生成量,随着O_2浓度增加,NO_x生成量增加;压力升高导致SO_2生成量明显减少,O_2/CO_2气氛下SO_2生成量小于空气气氛下SO_2生成量,SO_2生成量随着O_2浓度增加而增多.
To investigate the combustion characteristics and the pollutant emission characteristics of coal in pressurized oxy-fuel combustion, an experimental system with pressurized horizontal tube furnace oxy-fuel combustion was established, using Shanxi Hunyuan bituminous coal as an experimental material. This paper discussed effects of different combustion pressures (0.1 to 0.9 MPa) and different atmospheres (air and O2 /CO2 atmospheres with O2 concentrations of 21%, 26%, 31%, 36%, and 41%) on the combustion characteristics and the pollutant emission characteristics of pressurized oxy-fuel combustion processes. The results show that compared with the air combustion, the coal combustion time in O2 /CO2 atmosphere increases. As the concentration of O2 rises, the coal combustion time is shorter. With higher reaction pressure, the coal burning rate is accelerated and the enhancement gradually decreases. The amount of NOx generated gradually reduces with the increase of the reaction pressure in the O2 /CO2 atmosphere, it is smaller than that in the air atmosphere. As the O2 concentration increases, the generation of NOx is also increased. The increment in the reaction pressure leads to an obvious decrease in the amount of SO2 produced. In the O2 /CO2 atmosphere, the production of SO2 is less than that in the air atmosphere and increases with the increasing O2 concentration.
作者
谌伊竺
邵应娟
钟文琪
Chen Yizhu;Shao Yingjuan;Zhong Wenqi(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第1期164-170,共7页
Journal of Southeast University：Natural Science Edition
基金
国家重点研发计划资助项目(2016YFB0600802)
国家自然科学基金重点资助项目(51736002)
关键词
煤燃烧
加压富氧燃烧
燃烧特性
污染物
加压管式炉
coal combustion
pressurized oxy-fuel combustion
combustion characteristics
pollutants
pressurized tube furnace
