摘要
电站锅炉在低NO_(x)燃烧过程中因锅炉内还原性气氛浓度较高,会产生较多H_(2)S气体。针对H_(2)S因具有易燃、强腐蚀性、剧毒性而可能对火电厂造成多种危害的问题,采用可调谐二极管激光吸收光谱(tunable diode laser absorption spectroscopy,TDLAS)方法结合多通池和计算机搭建低气体摩尔分数在线测量系统,实现了对混合气体中摩尔分数在10–6量级H_(2)S的精确在线测量,并利用该测量系统进行了H_(2)S高温反应实验,探究实验温度和混合气体中O_(2)摩尔分数对该反应的影响。实验结果展示了压力为80 kPa、O_(2)摩尔分数为0~5%的条件下,H_(2)S开始发生化学反应的温度随O_(2)摩尔分数变化的变化规律,整体而言,混合气体中O_(2)摩尔分数越高,H_(2)S开始发生化学反应的温度越低。实验结果可以为锅炉烟气中H_(2)S的生成、转化和危害控制提供一定数据基础。
H_(2)S is an important product produced by power plant boilers in the process of low NO_(x)combustion.To solve the problems that H_(2)S may cause various hazards to thermal power plants due to its inflammability,strong corrosion and extreme toxicity,tunable diode laser absorption spectroscopy(TDLAS)method combined with multi-pass cell and computer is employed to build an online measurement system for detecting the molar fraction of low-concentration gas.By using this measurement system,accurate online measurement of H_(2)S in the mixed gas with the molar fraction of 10–6 magnitude is realized,and the H_(2)S high-temperature reaction experiment is carried out to explore the influence of experimental temperature and the molar fraction of O_(2)in the mixed gas on the reaction.The experimental results show that,under the conditions of pressure of 80 kPa and molar fraction of O_(2)ranging from 0 to 5%,the temperature at which H_(2)S begins to react changes with the molar fraction of O_(2).On the whole,the higher the molar fraction of O_(2)in the mixed gas,the lower the temperature at which H_(2)S begins to react.The experimental results can provide some data basis for the generation,transformation and harm control of H_(2)S in boiler flue gas.
作者
王嘉琦
田思迪
高东波
田志伟
彭志敏
杜艳君
WANG Jiaqi;TIAN Sidi;GAO Dongbo;TIAN Zhiwei;PENG Zhimin;DU Yanjun(Jingneng Qinhuangdao Thermal Power Co.,Ltd.,Qinhuangdao 066003,China;State Key Laboratory of Power Systems,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China)
出处
《热力发电》
CAS
CSCD
北大核心
2024年第2期162-169,共8页
Thermal Power Generation
基金
中国华能集团有限公司总部科技项目(HNKJ22-H105)
清华大学山西研究院种子基金项目(041509005)。
