摘要
化工行业废盐由于缺乏合适的处置手段,容易导致环境污染。目前主要通过填埋方式对化工生产过程中产生的工业废盐进行处理,但该处理方式无法实现废盐资源化利用。介绍了高温焚烧+精制、树脂吸附+高级氧化2种目前广泛应用的废盐资源化方法及其对应的工程案例。分析了废盐无法大规模资源化利用的原因:一方面,废盐资源化利用缺乏相应的技术标准以及法律法规;另一方面,缺乏处理成本低且适合大规模推广的技术。为保障废盐资源化顺利进行,不仅需要从源头做起降低废盐的产生量、采用合适的工艺来实现废盐的资源化,更需要相应法律法规的支持。
Chemical industry production produces a large amount of waste salt to result in environmental pollution due to lack of proper treatment processes.Landfill is presently the main disposal method of waste salts in China,which is impossible to recycle the waste salt.This paper introduces two approaches to waste salt recycling and treatments in detail,that is,the high temperature pyrolysis+brine purification process and the resin adsorption+advanced oxidation process Several application cases are taken to analyze and find the reason for their low rates of waste salt resource utilization.It turns out that the treatment and reuse of waste salt lack related standards and regulations,on the other hand,economical and practical technology for massive application is still unavailable.Therefore some constructive suggestions are put forward,including the industrial waste salt discharge amount should be reduced to some extent to realize waste salt recycling,new method should be developed,and new laws should be published for utilization of waste salt.
作者
王炼
陈利芳
高静静
仇鑫
戴建军
WANG Lian;CHEN Lifang;GAO Jingjing;QIU Xin;DAI Jianjun(Nanjing University and Yancheng Academy of Environmental Technology and Engineering,Yancheng 224000,China)
出处
《科技导报》
CAS
CSCD
北大核心
2021年第17期9-16,共8页
Science & Technology Review
基金
“十三五”国家水体污染控制与治理科技重大专项(2018ZX07402005)。
关键词
化工行业
废盐
资源化
chemical industry
industrial waste salt
resource utilization
treatment
