高盐脱硫废水水泥化固定技术的研究现状与发展

脱硫废水作为电厂的末端废水，产生背景复杂，水质水量特征受燃煤、石灰石以及脱硫系统运行等多因素影响，处理难度大。本文从脱硫废水污染物成分示踪角度介绍了脱硫废水的性质和产生背景，归纳了当前主流的脱硫废水零排放处理技术，将其分解为预处理、浓缩减量以及转移与固化3个单元：预处理主要是双碱法，浓缩减量分为膜浓缩和蒸发浓缩两大类，转移与固化主要包括蒸发结晶、旁路蒸发和固定/稳定化等技术。结合目前脱硫废水零排放进展，提出了一种水泥固定/稳定化脱硫废水工艺，综述了水泥固化脱硫废水的研究进展，同时对水泥行业中影响氯离子固定的各项因素进行了总结，水泥固定/稳定化脱硫废水技术发展前景广阔，但需要从提升固化体性能角度开展更多研究。

Research status and development on solidification for high-salt desulfurization wastewater with cement

As the terminal wastewater of power plant, desulfurization wastewater has complex background. The water quality and quantity characteristics are affected by coal, limestone and the operation of desulfurization system, etc. The characteristics of desulfurization wastewater are introduced from the aspects of the tracer of pollutant composition. At present, the common zero liquid discharge treatment technologies of desulfurization wastewater can be divided into three units: pretreatment, concentration and reduction, transfer and solidification. Pretreatment mainly refers to double alkali method. Concentration reduction can be divided into two categories: membrane concentration and evaporation concentration. Transfer and solidification mainly include evaporation crystallization, bypass evaporation and fixation/stabilization. In consideration of the progress of zero liquid discharge treatment technologies of desulfurization wastewater at present, the paper proposed a solidification/stabilization of desulfurization wastewater with cement, and summarized the factors affecting solidification of chloride ion in cement industry. The solidification/stabilization of desulfurization wastewater with cement has broad development prospects, but more research is needed to improve the performance of solidified blocks.