不同烟气及酸化条件对活性焦脱硝性能的影响

Effect of Different Flue Gas and Acidification Conditions on Denitrification Performance of Active Coke

基于单一变量控制方法,研究活性焦脱硝效果与反应温度、氨氮比和氧含量等参数之间的变化规律。分别采用硫酸、盐酸和硝酸对活性焦进行酸化处理,分析酸化活性焦对脱硝效率的影响。并在此基础上,进行V2O5改性活性焦的不同酸处理实验,对比分析脱硝效率的变化。结果表明:脱硝效率随温度的升高而提高;氨氮比在1.0~1.1范围内脱硝效率较高;氧含量在10%时,活性焦脱硝效率达到峰值51.3%;在200℃时,3种酸化处理后活性焦的脱硝效率均有所提高;未酸化的V2O5改性活性焦脱硝效率提升30.7%,而V2O5改性活性焦在硝酸酸化后的脱硝效率提升15.8%,但硫酸和盐酸酸化后活性焦的脱硝效率提升不明显。

Based on the single variable control method,the dependence of denitrification effect of active coke on reaction temperature,ammonia nitrogen ratio and oxygen content was studied.The active coke was acidified by sulfuric acid,hydrochloric acid and nitric acid respectively,and the influence of acidified active coke on denitrification efficiency was analyzed.On this basis,different acid treatment experiments of V2O5 modified active coke were carried out to compare and analyze the change of denitrification efficiency.Results show that the denitrification efficiency increases with the increase of temperature.The denitrification efficiency is highest in the range of 1.0-1.1 ammonia nitrogen ratio.When oxygen content is 10%,the denitrification efficiency of active coke reaches the peak value of 51.3%.At 200℃,the denitrification efficiency of the three acidified active coke increases.The denitrification efficiency of V2O5 modified active coke without acidification increases by 30.7%.And the denitrification efficiency of V2O5 modified active coke is improved by 15.8%after nitric acid acidification,while that of sulfuric acid and hydrochloric acid is not obvious.