凝结水精处理再生废水减量及资源化研究

凝结水精处理系统（精处理）再生废水影响全厂废水达标排放，增加废水零排放系统投资和运行费用。为降低其不良影响，从减少再生废水量及对再生废水进行分类处理、利用等方面进行分析，提出2种解决方案，一是通过给水加氧处理和高速混床优化等措施，减少精处理再生废水量；二是精处理阳树脂优先采用H₂SO₄再生工艺，再生废水可作为脱硫工艺用水循环利用。对于不具备H₂SO₄再生工艺改造条件的电厂，可根据再生各步序水质特点，将精处理再生废水中低含盐量废水作为工业水循环利用，高含盐量废水制取次氯酸钠或肥料，实现资源化利用。

Study on Reduction and Recycling of the Regenerated Wastewater from Condensate Polishing

The regenerated wastewater from condensate polishing treatment system may have significant impacts on the performance of the entire plant in that once the national standard for the discharge of wastewater is not reached, more investment will be needed and operation cost will rise up for zero wastewater discharge system. In order to reduce the side effects of regeneration wastewater, the following two schemes are put forward in the aspects of analysis on the reduction of the regeneration wastewater amount as well as the classification and treatment of the regeneration wastewater. One option is to reduce the volume of recycled waste water through feedwater oxygenated treatment and high-speed mixing bed optimization measures. While the other option is by giving the priority of implementing the H₂SO₄ regeneration technique in the fine treatment of positive resin, the recycled wastewater could be reused in the desulfurization process. For those power plants which are not qualified for H₂SO₄ regeneration process, according to the characteristics of the water quality of each step of regeneration, the recycled wastewater of low saline content can be reused as industrial water, while the high saline content wastewater can be treated to produce sodium hypochlorite or fertilizer to realize resource recovery.