Study on Process Design and Application of the Resourcfulization of Regenerated Wastewater Using Ion-Exchange Resin Method

doi:10.11930/j.issn.1004-9649.201703005

Abstract

Abstract: According to the characteristics of the wastewater from exchange resin regeneration in power plants, a new process consisting of ammonia fixing-ultrafiltration(UF)-reverse osmosis (RO)-degassing membrane is proposed and applied in a domestic 1 000 MW generator unit. with the system design and project construction, as well as the commissioning and performance tests being carried out. The results show that in the treatment of the wastewater from exchange resin regeneration using the new technique, when the recovery rate of saline water RO system is 75% and that of seawater RO system is 50%, the desalination rate can reach up to 97% and 98%, respectively. After the condensed water of RO system is treated by the degassing membrane, the removal rate of ammonia can reach 99%. The produced condensed water can be electrolyzed to make sodium hypochlorite, The ammonium salts separated from above process can be sold or used in plant greening while the fresh water can be used in industrial water system simultaneously. The practice indicates that the treatment process is feasible and is of great environmental and social benefits.

Key words: ion exchange, regeneration wastewater, reverse osmosis, degassing membrane, ammonia recovery

CLC Number:

TM311

LIAN Kunzhou, HU Teli, WANG Jing, PANG Shenglin, HE Gaoxiang, CAO Shihai, DENG Qiangqiang. Study on Process Design and Application of the Resourcfulization of Regenerated Wastewater Using Ion-Exchange Resin Method[J]. Electric Power, 2017, 50(11): 168-174.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201703005

https://www.electricpower.com.cn/EN/Y2017/V50/I11/168

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