江苏田湾核电站的3、4号机除盐水厂房反渗透系统运行中出现压差增大、产水量过低以及脱盐率下降等问题。通过对水质及垢样分析发现,由于水样中的Ca²⁺和HCO^-₃浓度都较高,导致膜系统CaCO₃结垢严重。根据结垢原因,通过单因素及正交实验筛选出最优酸液清洗配方为0.1% HCl+2% C₆H₈O₇+0.01% SDBS+0.05% AEO₅+0.05% MSDS,采用该配方进行一步清洗可使膜通量恢复率达到95.25%,跨膜压差下降了58.3%,清洗效果良好。

During the operation of the reverse osmosis membrane system in the demineralized water plant of unit 3 and 4 of Jiangsu Tianwan Nuclear Power Plant,there happens some problems,such as higher differential pressure,lower water production and the decreased desalination rate.It is found through analyzing water quality and scale sample that CaCO₃ scaling in the reverse osmosis membrane system is serious due to high concentration of Ca²⁺ and HCO^3- in water samples.According to the cause of scaling,the optimal acid cleaning formula -0.1% HCl+2% C₆H₈O₇+0.01% SDBS (sodium dodecyl benzene sulfonate)+0.05% AEO₅+0.05% MSDS (isothiazolinone) is obtained through single factor and orthogonal experiment methods.By using this formula for one-step cleaning,the membrane flux recovery rate can reach 95.25%,and the transmembrane differential pressure can be reduced by 58.3%.

管国斌(1982-),男,本科,高级工程师,研究方向为水处理,guangb@cnnp.com.cn