摘要
采用焦炉煤气和水蒸气作为氢系喷吹介质,研究了喷吹介质、喷吹方式、气体喷吹量等因素对烧结过程典型污染物释放规律的影响.结果表明,氢系气体喷吹使烧结料层温度分布明显改善,1200~1300℃的高温区间明显拓宽;喷吹0.6%(体积分数)的焦炉煤气后,烟气中的NO x峰值质量浓度最高降低了约100 mg/m 3,平均质量浓度降低21.1%,这主要是由于燃气喷吹拓宽了有利于复合铁酸钙生成的温度区间,而蒸汽喷吹对CO的减排有明显效果.蒸汽喷吹后水蒸气与烧结原料中的碳发生水煤气反应,烧结烟气中的CO从11690 mg/m 3最低降至9918 mg/m 3,降幅达29.4%;烧结料表面同时喷吹焦炉煤气和水蒸气可以实现NO x和CO的综合减排.
Coke oven gas and steam were used as the hydrogen-based injection media to analyze the effects of injection media,injection mode and the amount of gas injection on the release of typical pollutants in the sintering process.The results show that the temperature distribution of the sintering layer has obviously improved,with the high temperature range of 1200-1300℃widened evidently,after the hydrogen-containing gas is injected.After the coke oven gas(0.6%Vol.)was injected on the sintering material surface,the peak concentration of NO x in flue gas is reduced by about 100 mg/m 3,and the average concentration is reduced by 21.1%.This is mainly because the gas injection broadens the high temperature range of the material layer and the injection of steam on the sintering material surface has a significant effect on the reduction of CO emissions.After the steam is sprayed,the CO in the sintering flue gas is reduced from 11690 mg/m 3 to 9918 mg/m 3,a decrease of 29.4%.This is mainly because water vapor reacts with the carbon in the sintering raw material to produce water gas.The simultaneous injection of coke oven gas and water vapor on the sintering material surface can achieve a comprehensive reduction of NO x and CO emissions.
作者
周浩宇
范晓慧
李谦
甘敏
ZHOU Hao-yu;FAN Xiao-hui;LI Qian;GAN Min(School of Minerals Processing&Bioengineering,Central South University,Changsha 410083,China;National Engineering Research Center of Sintering and Pelletizing Equipment System,Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第2期260-266,299,共8页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51974371)
湖南省自然科学基金资助项目(2020JJ5994).
关键词
烧结工序
燃气喷吹
蒸汽喷吹
CO减排
NOX减排
sintering process
fuel gas injection
steam injection
carbon monoxide emission reduction
nitric oxide emission reduction
作者简介
周浩宇(1981-),男,湖南长沙人,中南大学博士研究生,中冶长天国际工程有限责任公司高级工程师;范晓慧(1969-),女,河北昌黎人,中南大学教授,博士生导师.
