化工环保2024，Vol.44Issue(5)：736-743,8.DOI:10.3969/j.issn.1006-1878.2024.05.019
焦化尾水资源化回用集成工艺中试
A pilot test of integrated process for resource reuse of coking tailwater
摘要
Abstract
To achieve the resource reuse of coking tail water,an integrated process,incorporating pretreatment,pressure-and electrically-driven membrane coupled process,and bipolar membrane electrodialysis,has been devised and piloted.In the integrated process,chemical softening and ozone-hydrogen peroxide composite oxidation process removed hardness and organics.The nanofiltration process separated ions.The electrodialysis and bipolar membrane electrodialysis processes achieve near-zero discharge and acid-base recycling.The chemical softening process can remove up to 64.2%of the hardness in raw water.The ozone-hydrogen peroxide composite oxidation process can remove up to 35.0%of the COD in reverse osmosis concentrated water.The nanofiltration process can achieve a desalination rate of 30.2%,with removal rates of chlorine ions,sulfate radicals,hardness,and TOC of-6.8%,97.3%,78.4%,and 87.4%,respectively.The bipolar membrane electrodialysis process can obtain acids and bases with concentrations above 2 mol/L,with an energy consumption of 4.0 kW·h/kg.The water reuse rate of this integrated process exceeds 90%.Acids and bases can be recycled in a short-term cycle.关键词
焦化尾水/资源化/双极膜电渗析/酸碱回用/废水循环利用Key words
coking tailwater/resource/bipolar membrane electrodialysis/acids and bases reuse/wastewater recycling分类
资源环境引用本文复制引用
张曼曼,段锋,石绍渊,李玉平,周玉生..焦化尾水资源化回用集成工艺中试[J].化工环保,2024,44(5):736-743,8.基金项目
国家重点研发计划项目(2021YFC2102205) （2021YFC2102205）
新疆兵团重大科技项目(2022AA005) （2022AA005）
中国科学院化学化工科学数据中心能力建设项目(WX145XQ07-12). （WX145XQ07-12）
