无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2026, Vol. 58 ›› Issue (1): 84-91.doi: 10.19964/j.issn.1006-4990.2024-0611

• 环境·健康·安全 • 上一篇    下一篇

印染反渗透浓水中碳酸钠的资源化回用技术研究

王锡惠1(), 王海涛1, 许以农3, 陈董根3, 刘鹏3, 陈东梅3, 任其成1, 李忠华3(), 常娜2()   

  1. 1.天津工业大学环境科学与工程学院,天津 300387
    2.天津工业大学化学工程与技术学院,天津 300387
    3.浙江津膜环境科技有限公司,浙江 绍兴 312000
  • 收稿日期:2024-11-19 出版日期:2026-01-10 发布日期:2026-01-20
  • 通讯作者: 李忠华(1998— ),硕士,研究方向为工业水处理及资源化利用;E-mail:2245959664@qq.com
    常娜(1984— ),教授,博士生导师,研究方向为高性能分离膜制备、新型纳米材料合成及催化性能研究、膜法水处理技术及工艺研究;E-mail:changna@tiangong.edu.cn
  • 作者简介:王锡惠(1999— ),硕士研究生,主要研究方向为印染反渗透浓水无机盐资源化回用;E-mail:wl15138691971@163.com
  • 基金资助:
    国家重点研发计划项目(2023YFC3206400);山东省重点研发计划项目(2022CXGC021002);山东省重点研发计划项目(2022CXGC020416);兵团科技计划项目(2023AB043)

Study on resourceful reuse technology of sodium carbonate in concentrated water of reverse osmosis for textile dyeing and printing

WANG Xihui1(), WANG Haitao1, XU Yinong3, CHEN Donggen3, LIU Peng3, CHEN Dongmei3, REN Qicheng1, LI Zhonghua3(), CHANG Na2()   

  1. 1. School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China
    2. School of Chemical Engineering and Technology,Tiangong University,Tianjin 300387,China
    3. Zhejiang ;Jinmo Environmental Technology Co. ,Ltd. ,Shaoxing 312000,China
  • Received:2024-11-19 Published:2026-01-10 Online:2026-01-20

摘要:

印染反渗透(RO)浓水具有有机物含量高、碱度大、盐分复杂的特征,其主要无机盐组分为硫酸钠(Na2SO4)、碳酸钠(Na2CO3)及碳酸氢钠(NaHCO3)的复合体系。针对现有硫酸钠回收技术成熟但高附加值碳酸钠资源化不足的现状,创新采用“超滤(UF)+臭氧高级氧化(AOP)+纳滤(NF)”集成工艺,重点突破复杂体系中碳酸钠的分离与回收。结果表明,“UF+AOP”预处理段对色度与COD的去除率分别达到98.87%和88.91%,有效保障纳滤系统的稳定运行;通过加酸调节pH将CO32-转化为HCO3-后,NF系统在1.6 MPa的运行压力下对SO42-的截留率为93.42%,对HCO3-的截留率为16.78%,再通过加碱回调pH将HCO3-转化为CO32-,实现Na2SO4与NaHCO3分离。工艺验证表明,整套系统运行稳定可靠。该研究构建印染RO浓水中有价无机盐的选择性回收新方法,为纺织印染行业实现废水零排放与资源循环利用提供具有工程应用价值的解决方案,兼具显著的环境效益与经济效益。

关键词: 反渗透浓水, 超滤, 臭氧高级氧化, 纳滤, 碳酸钠

Abstract:

The concentrated water from the reverse osmosis(RO) process in the dyeing and printing industry is characterized by high organic content,high alkalinity,and complex salt composition.The main inorganic salts in it are a complex system of sodium sulfate(Na2SO4),sodium carbonate(Na2CO3),and sodium bicarbonate(NaHCO3).In response to the current situation where the technology for recovering sodium sulfate was mature but the resource utilization of high⁃value sodium carbonate was insufficient,an integrated process of "ultrafiltration(UF)+advanced oxidation process(AOP) with ozone+nanofiltration(NF)" was innovatively used to focus on the separation and recovery of sodium carbonate from the complex system.The results showed that the "UF+AOP" pretreatment stage achieved a color removal rate of 98.87% and a COD removal rate of 88.91%,effectively ensuring the stable operation of the NF system.After adjusting the pH by adding acid to convert CO32- to HCO3-,the NF system,operating at 1.6 MPa,it reached a rejection rate of 93.42% for SO42- and 16.78% for HCO3-.By adjusting the pH with alkali to convert HCO3- back to CO32-,the separation of Na2SO4 and NaHCO3 was achieved.The process verification indicated that the entire system operated stably and reliably.This study had established a new method for the selective recovery of valuable inorganic salts from dyeing and printing RO concentrated water,providing a solution with engineering application value for the textile and dyeing industry to achieve zero wastewater discharge and resource recycling,with significant environmental and economic benefits.

Key words: reverse osmosis concentrated water, high alkalinity, advanced oxidation of ozone, nanofiltration, sodium carbonate

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