燃煤电厂湿法烟气脱硫废水处理技术研究进展

3 结语

脱盐是脱硫废水零排放要求下燃煤电厂面临的新问题，膜浓缩基础上的资源化回用使脱硫废水的深度脱盐成为可能。然而，脱硫废水成分复杂，钙镁离子、胶体颗粒物、无机垢成分的存在，会严重影响膜组件、热处理和电解设备的运行，渗透通量是衡量膜性能的重要指标，上述成分会加重膜污染和极化（浓差极化、温差极化）行为，使渗透通量持续下降。热处理设备结垢会导致传热效率降低，影响系统的稳定运行，对于电解设备来说，盐垢使电解槽有产生短路的危险。因此，为了实现高效脱盐，需对脱硫废水进行严格的预处理。脱硫废水处理技术众多，基于化学沉淀法的三联箱处理技术是一种潜在的脱硫废水预处理方式，既可降浊又可软化，短期内脱硫废水的预处理方式可围绕此法的优化展开。

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