摘要
在水资源紧缺的现状下,反渗透技术因其技术成熟、环境友好的特性被广泛应用于水处理行业。某热电厂一级反渗透系统运行中压差上升速度快、化学清洗频繁、周期制水量低,通过检查膜元件、一级反渗透进水母管、保安过滤器出口管,确认原因是还原剂加药点过于靠前,加药点后余氯被还原,致使系统重新被微生物污染,导致运行压差快速升高。针对该原因,采用高氯超滤水冲洗一级反渗透进水母管及保安过滤器,并将还原剂加药点后移至单台保安过滤器进口压力表处,处理后反渗透膜压差上升速度明显下降,运行恢复正常。建议在反渗透设备安装调试过程中合理设置加药点,运行中需做好监测,及时调整工况,减少膜污染情况的发生,保证反渗透设备的良好使用价值。
In current situation of water resource shortage,reverse osmosis technology is widely used in water treatment industries due to its mature technology and environmentally friendly.Differential pressure rises rapidly,chemical cleaning frequently,low cycle water production were existed during operation of primary reverse osmosis system in a thermal power plant.Membrane element,primary reverse osmosis inlet protopipe and security filter outlet pipe were checked,it is confirmed that reductant dosing point is too far forward to retain residual chlorine,caused system was re-polluted by microorganisms,which caused operating differential pressure rise rapidly.For this reason,primary reverse osmosis inlet protopipe and security filter were flushed by high-chlorine ultra-filtered water,reductant dosing point was moved to inlet pressure gauge of single security filter.Rising speed of differential pressure of reverse osmosis membrane decreased significantly after treatment,and operation returned to normal.It is recommended that dosing point should be reasonably set up during installation and commissioning of reverse osmosis equipment,monitoring should be done during operation,and working conditions should be adjusted in time to reduce occurrence of membrane pollution,to ensure reverse osmosis equipment could achieve good results.
作者
高凯楠
冯向东
GAO Kainan;FENG Xiangdong(Zhejiang Energy Group R&D,Hangzhou 311121,China;Zhejiang Provincial Key Laboratory of Energy Conservation&Pollutant Control Technology for Thermal Power,Hangzhou 311121,China)
出处
《净水技术》
CAS
2021年第12期111-115,共5页
Water Purification Technology
关键词
热电厂
一级反渗透
压差
微生物污染
还原剂
加药点
thermal power plant
primary reverse osmosis(RO)
differential pressure
microbial contamination
reductant
dosing point
