以脱硫喷淋塔出口的游离氨气为监测对象,通过模拟烟气实验,研究了吸收液的pH值、浓度、液气比(liquid to gas,L/G)和进口烟气温度等对氨逃逸量的影响.实验结果显示,随着吸收液pH值、浓度和液气比的增加,氨逃逸量逐渐增多.为减少氨逃逸,...以脱硫喷淋塔出口的游离氨气为监测对象,通过模拟烟气实验,研究了吸收液的pH值、浓度、液气比(liquid to gas,L/G)和进口烟气温度等对氨逃逸量的影响.实验结果显示,随着吸收液pH值、浓度和液气比的增加,氨逃逸量逐渐增多.为减少氨逃逸,保证高脱硫率,得到较为合适的工艺参数如下:pH=6.0,吸收液浓度为1%,液气比为4 L/m^3.从氨逃逸和硫酸铵结晶两方面综合考虑,进口烟气温度控制在90~110℃较为合适.展开更多
Aimed at the problem of short life of mixing head in KR mechanical mixing method for desulfurization of hot metal,a new type of mixing stir was proposed.CFD theory was used to simulate the characteristics of the fluid...Aimed at the problem of short life of mixing head in KR mechanical mixing method for desulfurization of hot metal,a new type of mixing stir was proposed.CFD theory was used to simulate the characteristics of the fluid flow for the new type of stirring vessel of water model for KR mechanical desulfurization.Flow characteristics and structures of the flow field were investigated and compared with the traditional cross-flow type.The results show that the new type of impeller can not only improve the defects of the flow caused by stir structure of the traditional type,but also reduce the separation of mixing zone in the stirred tank and make the flow field more uniform to make the desulfurization more fully, thus shortening the mixing time,and improving the life of mixing head.Numerical simulation method has been proven to be sound by comparing with the experimental ones.展开更多
文摘以脱硫喷淋塔出口的游离氨气为监测对象,通过模拟烟气实验,研究了吸收液的pH值、浓度、液气比(liquid to gas,L/G)和进口烟气温度等对氨逃逸量的影响.实验结果显示,随着吸收液pH值、浓度和液气比的增加,氨逃逸量逐渐增多.为减少氨逃逸,保证高脱硫率,得到较为合适的工艺参数如下:pH=6.0,吸收液浓度为1%,液气比为4 L/m^3.从氨逃逸和硫酸铵结晶两方面综合考虑,进口烟气温度控制在90~110℃较为合适.
基金Item Sponsored by Natural Science Foundation of Liaoning Province[No.20092002]the Program of Introducing Talents of Discipline to Universities[No.B07015]
文摘Aimed at the problem of short life of mixing head in KR mechanical mixing method for desulfurization of hot metal,a new type of mixing stir was proposed.CFD theory was used to simulate the characteristics of the fluid flow for the new type of stirring vessel of water model for KR mechanical desulfurization.Flow characteristics and structures of the flow field were investigated and compared with the traditional cross-flow type.The results show that the new type of impeller can not only improve the defects of the flow caused by stir structure of the traditional type,but also reduce the separation of mixing zone in the stirred tank and make the flow field more uniform to make the desulfurization more fully, thus shortening the mixing time,and improving the life of mixing head.Numerical simulation method has been proven to be sound by comparing with the experimental ones.
