摘要
针对钢铁企业烧结烟气的超洁净排放要求,分析烧结烟气脱硫除尘中遇到的难题,提出了旋流雾化脱硫除尘一体化技术。通过构造喷雾切圆旋流场,在湍流、雾化及凝并的作用下,在脱硫塔中提高脱硫效率和除尘效率。对某2×90 m2烧结机组的脱硫塔进行连续3 d的改造试验,试验结果表明,采用旋流雾化技术,在入口烟气流量、入口烟气温度、入口SO2浓度大幅波动的情况下,改造后的出口SO_2浓度能够稳定在30 mg/m3以下,脱硫效率可高达99.22%;在入口粉尘浓度为50 mg/m3且不增加湿电除尘的情况下,改造后的出口粉尘浓度能够稳定在8 mg/m3以下,除尘效率可高达94.3%,实现了烧结烟气的超洁净排放。
Aiming at ultra-clean emission requirements for sintering flue gas in iron and steel enterprises,the problems encountered in the process of sintering flue gas desulfurization and dusting were analyzed and swirl atomization desulfurization and dust integration technology was put forward. By constructing a spray tangential swirl field,desulfurization efficiency and dust removal efficiency of a desulfurization tower improved under the influence of turbulent flow,atomization and condensation. The three-day transformation test of a 2×90 m2 sintering unit desulfurization tower was carried out. The test results show that adopting swirl atomizing technology,although the inlet flue gas flow rate,inlet flue gas temperature,inlet SO2 concentration fluctuate sharply,the outlet SO2 concentration can be stabilized below 30 mg/m3 and the desulfurization efficiency can reach as high as 99.22% after reformation. When the inlet dust concentration is 50 mg/m3 and without adding a wet electrostatic precipitator,the outlet dust concentration can be stabilized below 8 mg/m3,the dust removal efficiency can reach as high as 94.3% after reformation,achieving ultra-clean emission of sintering flue gas.
作者
刘定平
袁丹珏
LIU Ding-ping;YUAN Dan-jue(School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China)
出处
《钢铁》
CAS
CSCD
北大核心
2018年第8期102-107,共6页
Iron and Steel
基金
国家自然科学基金资助项目(51676072)
广州市科技计划资助项目(201604020130)
关键词
烧结烟气
超洁净排放
旋流雾化
脱硫除尘一体化
sintering flue gas
ultra-clean emission
swirl atomization
desulfurization and dust integration
