首页|期刊简介|投稿指南|分类索引|刊文选读|订阅指南|证明资料|样刊邮寄查询|常见问题解答|联系我们
徐 启,邢嘉芯,张梦竹,等. 低NOx旋流燃烧器燃烧特性数值模拟[J]. 科学技术与工程, 2020, 20(20): 8168-8174.
xuqi,et al.Numerical simulation of the combustion characteristics of the low NOx swirl burner[J].Science Technology and Engineering,2020,20(20):8168-8174.
低NOx旋流燃烧器燃烧特性数值模拟
Numerical simulation of the combustion characteristics of the low NOx swirl burner
投稿时间:2019-09-05  修订日期:2020-04-18
DOI:
中文关键词:  DBC-OPCC型  低NOx 回流区  旋流燃烧器
英文关键词:DBC-OPCC  low NOx  recirculation zone  swirl bur
基金项目:
              
作者单位
徐 启 华北水利水电大学
邢嘉芯 华北水利水电大学
张梦竹 华北水利水电大学
戚 恒 华北水利水电大学
张岩 华北水利水电大学
摘要点击次数: 241
全文下载次数: 104
中文摘要:
      为分析DBC-OPCC型低NOx旋流燃烧器的燃烧性能与NOx释放特性,通过数值模拟的方法研究燃烧室内燃料粒子的射流轨迹,温度分布,速度分布及各组分分布之间的规律。结果表明:温度分布表现为中央高两边低,氧量分布与温度分布规律相反,一次风喷口处温度分布、氧量分布与回流区的形状、大小以及煤粉颗粒密度密切相关。出口流域CO2整体上沿中轴线呈对称分布即中央高两边低,其变化趋势与氧量分布规律相反与温度分布规律相近。喷口处CO含量极高,浓厚的还原性氛围对削减NOx排放具有积极作用,在一次风喷口处煤粉形成外浓内淡的分布形态以及“三高一低”区,强化加热、析出挥发分、着火以及高温火焰内的NOx还原,降低NOx排放,提升稳燃能力。气流呈风包粉结构,可防范水冷壁结焦与高温腐蚀现象。
英文摘要:
      In order to analyze the combustion performance and NOx release characteristics of DBC-OPCC-type low NOx swirl burner, numerical simulation was used to investigate the law of jet trajectory, temperature distribution, velocity distribution and distribution of each component of fuel particles in the combustion chamber. The results show that The temperature distribution is low on both sides of the Central high. The law of oxygen content is opposite to the temperature law. The temperature and oxygen distribution at primary air nozzle are closely related to the shape, size and concentration of pulverized coal in the recirculation zone. The CO2 distribution is low on both sides of the Central High. The distribution law of CO2 is opposite to the distribution law of oxygen and similar to the law of temperature. Extremely high CO content at vents has a positive effect on reducing NOx emissions. Areas It is concluded the distribution pattern of the rich in centre and lean outside and the “three high and one low” zone are formed at the nozzle. Can effectively reduce NOx emissions, improve the ability to stabilize combustion. The airflow is the structure of wind-clad powder, which effectively avoid coking and high temperature corrosion in the furnace.
查看全文  查看/发表评论  下载PDF阅读器
关闭
你是第33897997位访问者
版权所有:科学技术与工程编辑部
主管:中国科学技术协会    主办:中国技术经济学会
Tel:(010)62118920 E-mail:stae@vip.163.com
京ICP备05035734号-4
技术支持:本系统由北京勤云科技发展有限公司设计

京公网安备 11010802029091号