A nanofiltration membrane device for removing nitrate
CN224691955UActive Publication Date: 2026-08-28XINJIANG ZHONGTAI CHEM TOKSUN ENERGY & CHEM CO LTD +1
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Patent Information
- Application Number
- CN202521869677.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-01
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-09-01
AI Technical Summary
Technical Problem
而硫酸根的持续累积会加快氯碱电解中离子膜性能的衰减速度，削弱了离子膜的离子选择性迁移能力，并使得电解槽的电压上涨速率加快，增加了生产能耗
Benefits of technology
[0011]通过上述技术方案，本公开的纳滤膜除硝装置采用依次连接的三级过滤单元，形成了阶梯式的过滤流程。具体地，一级过滤单元先对电解槽排出的液体进行初步过滤，十组第一纳滤膜组件能够同时处理较多的液体量，提高了初步过滤的效率；经过一级过滤后，产生的一级浓缩液进入二级过滤单元，五组第二纳滤膜组件对一级浓缩液进行更深度的过滤，进一步降低硫酸根的含量；接着，二级过滤后产生的二级浓缩液进入三级过滤单元，三组第三纳滤膜组件进行最后的精细过滤，最大程度地去除硫酸根。如此，采用上述多级过滤的方式，能显著提高硫酸根的去除率，使得处理后的渗透液中硫酸根含量大幅降低，在此过程中，渗透液输送至化盐系统进行再利用，实现了资源的循环利用，减少了废水排放，降低了生产成本。
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Abstract
The present disclosure relates to a kind of nanofiltration membrane to remove nitrate device, including multi-stage filtration unit, multi-stage filtration unit includes primary filtration unit, secondary filtration unit and tertiary filtration unit;Primary filtration unit contains ten groups of first nanofiltration membrane components with first liquid inlet, primary concentrated liquid outlet and primary permeate outlet, and first liquid inlet is communicated with the liquid outlet end of electrolytic cell;Secondary filtration unit contains five groups of second nanofiltration membrane components with second liquid inlet, secondary concentrated liquid outlet and secondary permeate outlet, and second liquid inlet is communicated with primary concentrated liquid outlet;Tertiary filtration unit contains three groups of third nanofiltration membrane components with third liquid inlet, tertiary concentrated liquid outlet and tertiary permeate outlet, and third liquid inlet is communicated with secondary concentrated liquid outlet;Primary permeate outlet, secondary permeate outlet and tertiary permeate outlet are connected with salt system.The application can reduce the content of sulfate in brine system, ensure the stable progress of chlor-alkali electrolysis process, and reduce production energy consumption.
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