添加剂对石灰石颗粒移动床脱硫效率的影响

摘要

To improve the efficiency of a flue gas desulphurisation process,sodium hydroxide,sodium chloride, anhydrous sodium sulphate,anhydrous magnesium sulphate and adipic acid were chosen as hygroscopic additives, and the effects of their dosages for a moving bed reactor using limestone particles were studied.The mechanisms of enhancing the desulphurisation efficiency by the additives were also analysed.It has shown that all those additives were effective whilst just a small amount of any additives could raise the desulphurisation efficiency obviously so as to reduce the operation cost and to be more economical.%石灰石是比较廉价易得的脱硫吸收剂,采用添加剂可使石灰石系统的脱硫效率大幅度提高。为掌握添加剂对以石灰石颗粒为脱硫剂的半干法烟气脱硫的影响,以移动床反应器为实验设备,采用石灰石颗粒为脱硫剂的半干法脱硫工艺,研究吸湿性添加剂NaOH和NaCl、无水Na_2SO_4、无水MgSO_4、己二酸等5种添加剂在不同浓度下对石灰石颗粒移动床系统脱硫效率的影响;分析了添加剂提高脱硫效率的机理。实验结果表明,以上5种添加剂均有提高脱硫效率的作用,并且加入少量添加剂即可明显提高系统的脱硫效率,从而降低操作费用,提高其经济性。