Experimental study on high temperature reaction characteristics of H2S based on TDLAS
H2S is an important product produced by power plant boilers in the process of low NOx combustion.To solve the problems that H2S 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 H2S in the mixed gas with the molar fraction of 10-6 magnitude is realized,and the H2S high-temperature reaction experiment is carried out to explore the influence of experimental temperature and the molar fraction of O2 in the mixed gas on the reaction.The experimental results show that,under the conditions of pressure of 80 kPa and molar fraction of O2 ranging from 0 to 5%,the temperature at which H2S begins to react changes with the molar fraction of O2.On the whole,the higher the molar fraction of O2 in the mixed gas,the lower the temperature at which H2S begins to react.The experimental results can provide some data basis for the generation,transformation and harm control of H2S in boiler flue gas.
TDLASH2Son-line measurementhigh temperature reactionO2 molar fraction
万方数据
