工程科学学报2017，Vol.39Issue(5)：756-761,6.DOI:10.13374/j.issn2095-9389.2017.05.014
分区分级双P型辐射管喷口结构位置特性
Location characteristics of the nozzle structure in the double P-type radiant tube
摘要
Abstract
To optimize combustion efficiency, the structural characteristics of the zoned and staged double P-type gas-fired radiant tube were improved. The corresponding experimental and numerical studies were performed on the new radiant tube and the results show that deviations in the monitoring parameters are less than 1%, except for a NOx concentration of 11. 6%, which proves the relia-bility of the model. On this basis, the gas and wall temperatures were compared by changing the nozzle position and structure parame-ters of main and branch pipes. The results show that as the nozzle position moves outward, the highest value of the surface temperature of the radiant tube gradually decreases and the minimum value of the wall temperature gradually increases. When the nozzle of the branch pipe locates at the intersection of the tee and branch pipes, it helps to reduce the impact of the high temperature gas on the pipe wall, improve the uniformity of the branch radial temperature, and prolong the service life of the radiation tube. When the nozzle is fully premixed, the temperature difference is minimized. When the pipe nozzle is asymmetric, the difference in the wall temperatures is minimized and the thermal combustion efficiency is the highest.关键词
辐射管/喷嘴/空燃比/结构/氮氧化物控制Key words
radiant tube/nozzle/air-fuel ratio/structure/nitrogen oxide control分类
矿业与冶金引用本文复制引用
徐钱,冯俊小,周闻华,陈艳梅..分区分级双P型辐射管喷口结构位置特性[J].工程科学学报,2017,39(5):756-761,6.基金项目
"十三五" 国家重点科技支撑计划资助项目(2016YFB0601300) （2016YFB0601300）
