宏量和微量元素在炉内喷钙脱硫过程中的作用

The Effects of Massive Elements and Microelements underLimestone Desulphurization in PulverizedCoal Boilers

研究添加粉煤灰对脱硫过程的作用，实验在滴管炉上进行，温度为１２００℃．结果表明，一些宏量元素的金属氧化物（如Ｆｅ２Ｏ３）对脱硫过程具有催化作用，但这种催化作用随Ｆｅ２Ｏ３掺加量的改变而变化，先升高后降低，有一个最佳值；一些微量元素的金属氧化物（如ＭｎＯ２）对脱硫过程具有更强的催化氧化作用，当ＭｎＯ２的掺加量为３％时。

This paper investigates the effects of adding coalash under limestone desulphurization in pulverizedcoal boilers.The experiments were carried out at 1200℃ in the particle furnace.The experimental results show that some massive elements' metal oxides,for example,Fe2O3,may catalyze the reaction of SO2 with limestone,and this catalytic effect changes with the increasing metal oxides weight ratio.Moreover,a few microelements in coal ash,e.g.MnO2,play an important catalytic and oxide role in the proceedings of desulphurization.The desulphurization efficiency nearly double when the addition of MnO2 is 3%.