摘要
在酸性气燃烧制硫工艺中,酸性气的安全、稳定燃烧对制硫炉的平稳运行具有重要的影响。对制硫炉在3种负荷(30%为低负荷、100%为满负荷、120%为超负荷)条件下的燃烧状况进行数值模拟,采用RNG k-ε模型模拟制硫炉炉膛内的湍流过程,采用涡耗散模型模拟制硫反应过程中的组分运输和化学反应过程,考察制硫炉炉膛内混合气体速度、温度、反应物和生成物浓度的变化情况。结果表明:低负荷条件下,单位时间内硫产量较少,工业应用的性价比较低;超负荷条件下的湍流强度较高,对燃烧室、炉膛,尤其对第一道导流板造成的损耗巨大;因此满负荷最适用于制硫炉。制硫炉炉膛中混合气体的速度、温度分布都比较均匀,主要生成产物S_(2)在炉膛出口的质量分数分别为12.30%、12.38%和12.35%,主要生成物SO_(2)的质量分数为1.59%、1.41%和1.49%,3种负荷条件下燃烧产生的2种主要生成物S_(2)和SO_(2)在炉膛出口处含量占比十分接近,证明制硫炉在设计弹性负荷30%~120%范围内均可以保证稳定燃烧。
In the process of sulfur production by acid gas combustion,the safe and stable combustion of acid gas has a crucial impact on the smooth operation of the sulfur furnace.Numerical simulations were performed on the combustion conditions of a sulfur furnace under three different loads(30%low load,100%full load,and 120%overload),the RNG k-εmodel was used to simulate the turbulent flow process in sulfur furnaces,and the vortex dissipation model was applied to simulate the component transport and chemical reaction process during sulfur reaction.This aims to investigate the changes in mixed gas velocity,temperature,reactant and product concentrations in sulfur furnaces.The research results indicate that under low load conditions,the relatively low sulfur production per unit time means the low cost-effectiveness of industrial applications,and the high turbulence intensity under overload conditions leads to huge losses to the combustion chamber and furnace,especially to the first guide plate,and therefore full load is most suitable for sulfur furnaces.The mixed gas in the furnace of the sulfur making furnace show a relatively uniform velocity and temperature distribution.The mass fraction of the main product S_(2) at the furnace outlet is 12.30%,12.38%,and 12.35%,respectively,and the mass fraction of the main product SO_(2) is 1.59%,1.41%,and 1.49%,respectively.The two main products S_(2) and SO_(2) generated by combustion under three different load conditions have similar proportions at the furnace outlet,proving that the sulfur making furnace can ensure stable combustion within the designed elastic load range of 30%—120%.
作者
王娟
刘翊辉
伊志奇
李迪
李秀明
WANG Juan;LIU Yihui;YI Zhiqi;LI Di;LI Xiuming(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China;Beijing Key Laboratory of Process Fluid Filtration and Separation,Beijing 102249,China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2024年第6期1604-1613,共10页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金项目(21106181)资助。
关键词
克劳斯反应
酸性气
富氧燃烧
数值模拟
H_(2)S燃烧炉
燃烧特性
硫回收
Claus reaction
acid gas
oxygen enriched combustion
numerical simulation
H_(2)S combustion furnace
combustion characteristic
sulfur recovery
作者简介
通讯联系人:王娟,女,副教授,博士,从事多相流动及燃烧过程的数值模拟与实验研究,E-mail:wangjuan@cup.edu.cn。
