火电厂全厂末端废水分盐处理工程实例
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摘要
以某发电厂全厂末端废水处理工程为例,介绍了化学软化-管式微滤-纳滤-(反渗透)-碟管式反渗透-蒸发结晶工艺在再生水水源发电厂全厂末端废水处理中的应用。经纳滤处理后,末端废水被分成两部分,一部分经碟管式反渗透浓缩后进入混盐结晶系统,另一部分经反渗透-碟管式反渗透浓缩后进入精制盐结晶系统。整套工艺的产水全部回收作为循环水补充水,实现全厂废水不外排,精制盐结晶系统产生的结晶盐中NaCl质量分数达98.75%,外售处理。废水处理总运行费用约33.89元/m~3,低于同类型处理工艺,可以为相关电厂的改造提供参考。
The application of chemical softening-tube microfiltration-nanofiltration-(reverse osmosis)-disc tubular reverse osmosis-evaporation crystallization process was introduced in the treatment of terminal wastewater of a thermal power plant which used reclaimed water as the sole water source.After nanofiltration treatment,the terminal wastewater was divided into two parts,one part was concentrated by disc tubular reverse osmosis and entered the mixed salt crystallization system,and the other part was concentrated by reverse osmosis-disc tubular reverse osmosis and entered the refined salt crystallization system.The produced water was completely used as replenish water for water circle system,and the crystal salt of the refined salt crystallization system had a sodium chloride mass fraction of 98.75%,which was sold separately.The total operating cost of this case was about CNY 33.89/m~3,which was lower than the same type wastewater treatment process.The results will provide reference for the modification of thermal power plant.
The application of chemical softening-tube microfiltration-nanofiltration-(reverse osmosis)-disc tubular reverse osmosis-evaporation crystallization process was introduced in the treatment of terminal wastewater of a thermal power plant which used reclaimed water as the sole water source.After nanofiltration treatment,the terminal wastewater was divided into two parts,one part was concentrated by disc tubular reverse osmosis and entered the mixed salt crystallization system,and the other part was concentrated by reverse osmosis-disc tubular reverse osmosis and entered the refined salt crystallization system.The produced water was completely used as replenish water for water circle system,and the crystal salt of the refined salt crystallization system had a sodium chloride mass fraction of 98.75%,which was sold separately.The total operating cost of this case was about CNY 33.89/m~3,which was lower than the same type wastewater treatment process.The results will provide reference for the modification of thermal power plant.
引文
[1]潘荔,刘志强,张博.中国火电节水现状分析及措施建议[J].中国电力,2017,50(11):158-163.
[2]马淑杰,朱黎阳,王雅慧.我国高耗水工业行业节水现状分析及政策建议[J].中国资源综合利用,2017,35(2):43-47.
[3]樊星,陈临泉.燃煤电厂排水梯级利用与零排放[J].电力科技与环保,2016,32(5):26-28.
[4]王志轩,潘荔,刘志强,等.中国煤电清洁发展现状及展望[J].电力科技与环保,2018,34(1):1-8.
[5]孙振宇,沈明忠.燃煤电厂脱硫废水零排放工程案例研究[J].工艺水处理,2018,38(10):102-105.
[6]邵国华,方棣.电厂脱硫废水正渗透膜浓缩零排放技术的应用[J].工业水处理,2016,36(8):109-112.
[7]刘政修,袁育亭.采用城市再生水作为循环冷却水补水的循环排污水处理工艺探讨[J].华北电力技术,2014(4):50-53.
[8]王义兵,张江涛,焦涵宇,等.火电厂节水与废水治理技术路线制定方法[J].热力发电,2018,47(7):125-132.
[9]俞彬,陈飞,王小军,等.电厂脱硫废水零排放处理工程实例[J].工业水处理,2018,38(4):94-96.
[10]王可辉,王飞,祖坤勇,等.全膜法技术在电厂脱硫废水零排放中的应用[J].净水技术,2018,37(10):79-83.
[2]马淑杰,朱黎阳,王雅慧.我国高耗水工业行业节水现状分析及政策建议[J].中国资源综合利用,2017,35(2):43-47.
[3]樊星,陈临泉.燃煤电厂排水梯级利用与零排放[J].电力科技与环保,2016,32(5):26-28.
[4]王志轩,潘荔,刘志强,等.中国煤电清洁发展现状及展望[J].电力科技与环保,2018,34(1):1-8.
[5]孙振宇,沈明忠.燃煤电厂脱硫废水零排放工程案例研究[J].工艺水处理,2018,38(10):102-105.
[6]邵国华,方棣.电厂脱硫废水正渗透膜浓缩零排放技术的应用[J].工业水处理,2016,36(8):109-112.
[7]刘政修,袁育亭.采用城市再生水作为循环冷却水补水的循环排污水处理工艺探讨[J].华北电力技术,2014(4):50-53.
[8]王义兵,张江涛,焦涵宇,等.火电厂节水与废水治理技术路线制定方法[J].热力发电,2018,47(7):125-132.
[9]俞彬,陈飞,王小军,等.电厂脱硫废水零排放处理工程实例[J].工业水处理,2018,38(4):94-96.
[10]王可辉,王飞,祖坤勇,等.全膜法技术在电厂脱硫废水零排放中的应用[J].净水技术,2018,37(10):79-83.