采用流态化活性炭脱除燃煤烟气污染物的试验研究

Removal of Pollutants from Coal-fired Flue Gas Using Fluidized Activated Carbon

采用普通木质粉状活性炭,在循环流化床反应器中进行了活性炭脱除燃煤烟气污染物的探索性试验.结果表明:高炭/硫摩尔比、高含水量和低温有利于脱硫效率的提高,但其影响程度不同;高炭/硫摩尔比也有利于脱硝,但高含水量和低温对脱硝效率的影响相反,且随着含水量的增加和温度的降低,脱硝效率呈现先提高后降低的趋势;活性炭对烟气中的SO3和HCN具有脱除作用,但未发现其对HCl和HF的脱除有明显影响;提高物料循环倍率虽能提高脱硫和脱硝效率,但受烟气中水含量的限制,循环倍率所起作用相对不大.

Exploratory experiments of pollutants removal from coal-fired flue gas were carried out in a circulating fluidized bed （CFB） reactor with common activated carbon powder made of wood. Results show that high C/S molar ratio, high water content and low temperature are beneficial to desulfurization efficiency. But the influencing degrees are different. High C/S molar ratio is also beneficial to denitration, while the effect of high water content and low temperature on denitration efficiency is opposite. With the increase of water content and the decrease of temperature, denitration efficiency increases at first and then decreases. S03 and HCN can be partly removed by activated carbon, which has no obvious effect on removal of HC1 and HF. The enhancing of circulation ratio is beneficial to desulfurization and denitration efficiency, but the influence is relatively small due to the restraint of water content in the flue gas.