NID半干法脱硫系统脱除烟气中SO_2的试验研究  

Experimental Research of NID Semi-dry Desulphurization of Flue Gas

作　　者：王运军[1] 王海亮[1] 段钰锋[2] 

机构地区：[1]山西省电力勘测设计院,山西太原030001 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《锅炉技术》2011年第3期71-76,共6页Boiler Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2006CB200304)

摘　　要：研究NID半干法脱硫系统脱除烟气中SO2,用氮气(N2)等温吸附(77K)测量了生石灰消化后消化产物消石灰与生石灰脱硫剂的比表面积、孔径、孔比表面积、孔容积和孔分布,分析了其物理性质上的差别所造成的脱硫性能的差异,还分析了消化度、消化水初始温度、烟气中水蒸汽份额和水钙摩尔比等参数对脱硫性能的影响。研究结果表明,生石灰经过消化变成消石灰后,脱硫剂的比表面积、比表面积分布以及微孔数量显著增加,对脱除烟气中的SO2极其有利。在本试验条件下,随着消化产物的消化度、比表面积和比孔容的提高,脱硫效率增大;随着消化产物最可几孔径和表面分形维数的增大,脱硫效率也增大。烟气中水蒸汽份额和水钙摩尔比等参数对脱硫性能均有影响,上述参数数量的增加,也会导致脱硫效率提高。In this work,the attention was focused on SO2 removal of NID（Novel Integrated Desulphurization） semidry process desulphurization system.Specific surface area,pore size,pore specific surface area,pore volume and pore distribution of quicklime and hydrated lime were measured by nitrogen adsorption isotherm at 77 K.Because of their different physical properties,the desulphurization analyzed was diverse.The effect of the degree of digestibility,the initial temperature of hydrating-water,the steam share in flue gas and the molar ratio of water to calcium on desulphurization was also analyzed.The results showed that after quicklime was digested into hydrated lime,the specific surface area,pore specific surface area and the quantity of microporous of desulfurizer increased much,which were extremely favorable to removal of SO2 from flue gas.Under the experimental conditions,with the digestion,the specific surface area and pore volume of digestive production increases,the desulphurization efficiency increases.With the most probable pore size and surface fractal dimension increases,the desulphurization efficiency also increases.The steam share in flue gas and the molar ratio of water to calcium also have an influence on desulphurization,and the desulphurization efficiency increased with these parameters increasing.

关 键 词：半干法 脱硫效率 消化度 水钙摩尔比 

分 类 号：X701.3[环境科学与工程—环境工程]