利用粉煤灰吸收剂对烟气脱硫脱氮的实验研究

THE EXPERIMENTAL INVESTIGATION OF DESULFURIZATION AND DENITRIFICATION FROM FLUE GAS BY ABSORBNTS BASED ON FLY ASH

开发了以粉煤灰、Ca(OH) 2 为基础物质的新型高活性吸收剂。采用固定床方式和管道喷射方式 ,实现了烟气脱硫脱氮。根据影响吸收剂吸收性能的若干因素 ,进行了脱除烟气中SO2 和NOx 的实验研究。在干法管道喷射烟气脱硫脱氮实验中 ,在较低钙硫比情况下 ,实验获得了 84 %左右的脱硫效率以及 4 0 %左右的脱氮效率。在实验的基础上 ,探讨了以粉煤灰为基础物质制备的高活性吸收剂脱除SO2 和NOx 的机理。指出了该方法的优势和应用前景 ,研究结果可为电厂烟气污染控制提供参考。

The highly active absorbents based on fly ash and Ca(OH) 2 had been exploited.The processes of fixture bed and duct injection were used,combined desulfurization and denitrification was achieved.Experimental study on removal of SO 2 and NO x from flue gas using the highly active absorbents was carried out according to some factors which influences the capability of absorbency.In the experiment of dry duct injection for removal of SO 2 and NO x from flue gas ,about 84% of absorbing efficiency for SO 2 and 40% of absorbing efficiency for NO x were achieved under low Ca/S ratio.The mechanism of removal of SO 2 and NOx by the absorbents based on fly ash was investigated on the base of experiments.The advantages and application foreground of the technology are pointed out,study results can offer references for pollution control of flue gas of power plants.