聚环氧琥珀酸及其复配物在城市中水中的阻垢性能

Inhibition performance of polyepoxysuccinic acid and its mixtures in reclaimed water

针对电厂循环冷却水补充水为城市中水的基本水质,采用碳酸钙沉积法研究了绿色环保型水处理剂聚环氧琥珀酸(PESA)与2-膦酸丁烷-1,2,4-三羧酸(PBTCA)、马来酸-丙烯酸共聚物(MA-AA)的阻垢协同性,筛选出了较优复合配方(6 mg/L PESA+4 mg/L MA-AA+5 mg/L PBTC),并考察了温度、pH值、HCO3-对不同阻垢剂阻垢率的影响。试验结果表明,较优复合配方有较好的耐热性、耐碱性,可用于高温热水系统及pH值较高的循环水系统;此外,随HCO3-浓度的增加,较优复合配方的阻垢率下降不大,因此该配方还可用于高HCO3-浓度的循环水系统。

According to the quality of the city reclaimed water used in the circulatory cooling water in the power plants, the anti-scaling synergy of PESA ,PBTCA ,MA-AA with calcium carbonate precipitation method were studied and the optimized compositional formulation （6 mg/L PESA ＋4 mg/L MA-AA ＋5 mg/L PBTCA）was screened out. The effects of temperature, pH, and HCO3 on inhibition rate in different scale inbibitors were examined. The result demonstrated that the optimized mixed formula had advantage in thermal and alkaline stability, which could be applied in circulating water system of high temperature and high pH. In addition, when the concentration of HCO3 increased, tbe inhibition rate of optimized mixed formula decreased a little. Therefore, this formula can be applied in circulating water system of high concentration of HCO3.