文档介绍：河北工业大学
硕士学位论文
半干法烟气脱硫脱硝一体化的实验研究
姓名:李玲密
申请学位级别:硕士
专业:化工过程机械
指导教师:张少峰
20100501
河北工业大学硕士学位论文
半干法烟气脱硫脱硝一体化的实验研究
要摘
烟气脱硫脱硝一体化技术适合我国国情,具有良好的应用前景。
本文以尿素为吸收剂,在喷动床试验装置中进行半干式烟气脱硫研究,考察了
CO(NH2)2/SO2 摩尔比、绝热饱和温差、进口烟气温度、进口 SO2 浓度等因素对脱硫效率
的影响。同时以尿素为吸收剂,在此装置中进行了半干式烟气同时脱硫脱硝试验研究,考
察了该方法的可行性及尿素与污染物摩尔比、绝热饱和温差、进口烟气温度、进口污染物
浓度等主要操作条件对于脱硫效率和脱硝效率的影响。结果表明:该法比用消石灰浆液在
喷动床中进行脱硫的效率低,但是用尿素溶液可以同时脱除烟气中的NOX。在适当的操作
条件下可获得 85%以上的脱硫效率和 70%以上的脱硝效率,可以满足工业规模应用的要求。
同时,尿素与污染物摩尔比大于后,污染物脱除效率反而明显降低,与其他半干式工
艺差异显著;而其它操作条件对污染物脱除效率的影响规律与其它半干式工艺基本吻合。
通过线性回归,得出了脱硫效率和脱硝效率和与上述因素之间的关联式,计算值与实验值
吻合较好。
关键词:喷动床,脱硫脱硝一体化技术,尿素,半干式工艺
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半干法烟气脱硫脱硝一体化的实验研究
EXPERIMENTALRESEARCH OF FLUE GAS
DESULFURIZATIONAND DENITRIFICATION
WITH SEMI-DRY TECHNIQUE
ABSTRACT
Simultaneous desulfurization and denitrification technology is applicable in our national
conditions and has good application prospect.
Semi-dry technique flue gas desulfurization was studied in spouted bed testing apparatus by
using urea as absorbent. The effects of many key operating parameters on the removal efficiency
of SO2 were investigated,such as molar ratio of urea and SO2、inlet temperature of flue gas、
static bed height、approach to adiabatic saturation temperature、inlet concentration of SO2 etc.
Synchronously semi-dry flue gas simultaneous desulfurization and denitrification was studied for
its feasibility in the same testing apparatus by using the same absorbent. The effects of key
operating parameters such as molar ratio of urea and air pollutant 、 approach to adiabatic
saturation temperature、inlet temperature of flue gas and inlet concentration of air pollution on
the removal efficiency of SO2 and NOX were investigated. The results show that the
desulfurization efficiency by using Ca(OH)2 serosity is higher than that by using urea solution,
but by using urea solution as absorbent can also remove NOX from the flue gas. In the proper
condition the removal efficiency of SO2 and NOX are above 85% and 75%