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

doi:10.11930/j.issn.1004-9649.201905109

Abstract

Abstract: 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.

Key words: condensate polishing, regeneration wastewater, feedwater oxygenated treatment, high speed mixed bed, operation optimization, wastewater resource conversion

WANG Yuanyuan, GAO Yanfeng, HU Dalong, MENG Long, LI Jianbo, LI Junwan, WANG Jing, LI Zhao. Study on Reduction and Recycling of the Regenerated Wastewater from Condensate Polishing[J]. Electric Power, 2020, 53(11): 252-256.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201905109

https://www.electricpower.com.cn/EN/Y2020/V53/I11/252

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