摘要
脱硫废水烟道蒸发处理工艺所用喷嘴易被脱硫废水中悬浮颗粒物堵塞,为此提出与之配套的深度过滤脱硫废水预处理工艺,将脱硫废水在雾化蒸发前进行固液深度分离预处理。深度过滤处理后,脱硫废水中悬浮物质量浓度可以降低到40 mg/L,水中99%以上的固体颗粒粒径小于1μm。通过建模理论计算和Fluent软件模拟,对脱硫废水深度过滤-烟道蒸发工艺进行研究,结果表明,烟气温度越高,雾化液滴粒径越小,越有利于雾化废水的蒸发。综合考虑蒸发效果和能耗成本,建议实际工程应用中可将雾化液滴直径控制在60μm。所得研究结果可供雾化喷射装置设计、烟道蒸发系统运行优化参考。
The atomizing nozzle of the desulfurization wastewater treatment system tends to be blocked by the suspended solids in the water. Therefore, the correlative filtration process is proposed as a pretreatment process, in which the water is thoroughly separated before evaporation. After the filtration, the mass concentration of the suspended solids in the wastewater can be decreased to 40 mg/L with over 99% of the remaining particles smaller than 1 μm. Moreover, the theoretical calculation as well as digital simulation using the Fluent software package is conducted to study the evaporation process. The results show that higher flue gas temperature and smaller liquid drop diameter yield shorter evaporation time. By taking in account of the liquid drop evaporation effects and the energy consumption, it is recommended to make the diameter of the liquid drops under 60 μm in engineering applications. The study resuhs can provide some guidance for the atomizing nozzle system design, as well as the optimization of the treatment process.
作者
晋银佳
王帅
姬海宏
王丰吉
朱跃
王朔
JIN Yinjia WANG Shuai JI Haihong WANG Fengji ZHU Yue WANG Shuo(Huadian Electric Power Research Institute, Hangzhou 310030, China Yigongchen （Tianjin） Energy Conservation and Environmental Protection Technology Development Company, Tianjin 300350, China Shijiazhuang Yuhua Thermal Power Plant of Hebei Huadian, Shijiazhuang 051430, China)
出处
《中国电力》
CSCD
北大核心
2016年第12期174-179,共6页
Electric Power
关键词
脱硫废水
预处理
烟道蒸发
深度过滤
数值模拟
FGD waste water
pretrcatment
flue evaporation
deep filtration
numerical simulation
