含盐高有机污染水源的反渗透处理工艺
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摘要
针对含盐高有机物污染水源,明确了反渗透系统的主要设计目标是降低系统污染速度,因此需要降低系统的设计通量、降低浓差极化度与提高系统通量均衡度。提出了浓水回流、段间加压、缩短系统流程及立式膜壳安装等一系列降低系统污染速度的特殊工艺与结构,分析了其与浓差极化度、段通量比、端通量比、系统脱盐率、段壳浓水比及吨水能耗等系统运行指标的关系,从而形成了针对含盐高有机物污染水源的反渗透系统设计模式。
Aiming at the salt-containing and high organic matter polluted water sources,it is ascertained that the main design objective of reverse osmosis(RO) system is to reduce the pollution velocity of the system. Therefore,it is necessary to reduce the design flux of the system,reduce concentration polarity,and improve the system flux balance level. A series of special processes and structures for reducing the system pollution velocity,such as concentrated water recovery,intersegment pressuring,shortening of system flow,vertical membrane shell installation,etc. have been proposed. The relationship of these processes and structures with the system operation indexes,such as concentration polarity,segment flux ratio,end-to-end flux ratio,system salt rejection rate,concentrated water ratio of each shell in each segment,energy consumption per ton,etc. has been analyzed. Thus,the designed mode of the RO system for the salt-containing and high organic matter polluted water sources is formed.
Aiming at the salt-containing and high organic matter polluted water sources,it is ascertained that the main design objective of reverse osmosis(RO) system is to reduce the pollution velocity of the system. Therefore,it is necessary to reduce the design flux of the system,reduce concentration polarity,and improve the system flux balance level. A series of special processes and structures for reducing the system pollution velocity,such as concentrated water recovery,intersegment pressuring,shortening of system flow,vertical membrane shell installation,etc. have been proposed. The relationship of these processes and structures with the system operation indexes,such as concentration polarity,segment flux ratio,end-to-end flux ratio,system salt rejection rate,concentrated water ratio of each shell in each segment,energy consumption per ton,etc. has been analyzed. Thus,the designed mode of the RO system for the salt-containing and high organic matter polluted water sources is formed.
引文
[1]程方.水处理与膜分离技术问答[M].北京:化学工业出版社,2012:109-153.
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[4]王文娜,江海,张文志,等.有机污染反渗透系统中的污染物质量分布[J].工业水处理,2015,35(5):34-38.
[5]靖大为,席燕林.反渗透系统优化设计与运行[M].北京:化学工业出版社,2016:141-142.
[2]美国海德能公司.反渗透和纳滤膜产品技术手册[Z].海德能公司,2013:87-88.
[3]严丹燕.关于反渗透系统中的均衡通量问题[J].亚洲给水排水,2011(8):22-23.
[4]王文娜,江海,张文志,等.有机污染反渗透系统中的污染物质量分布[J].工业水处理,2015,35(5):34-38.
[5]靖大为,席燕林.反渗透系统优化设计与运行[M].北京:化学工业出版社,2016:141-142.