膜科学与技术

国产高压纳滤膜在化工废水零排放分盐系统中的应用研究

作者：钱泰宇，孙楠，祝敏，张龙兴

单位：沃顿科技股份有限公司，贵阳550018

关键词：高压纳滤膜；零排放；纳滤分盐；硫酸根；氯根；正截留

出版年,卷(期):页码： 2023,43(1):139-143

摘要：

以某大型化工集团公司5.5万m³/d零排放项目高压纳滤分盐系统为基础，对国产高压纳滤膜在高浓度TDS下分盐的实际运行工况，包括运行压力、压差、产水量及硫酸根截留率等展开了研究。研究结果表明：系统运行240天后仍可达到稳定的分盐效果，硫酸根截留率大于99.7%，氯根正截留率为1.2%。但由于COD的不断循环浓缩等原因，造成系统持续污堵，进水压力由初始2.22 MPa最高增至3.72 MPa，同时实验显示34 mil格网相对28 mil格网纳滤在系统压差上有明显优势。

Abstract: Research on domestic high-pressure NF salt separation system in a large chemical group company of 55000m³/d zero liquid discharge project, to explore the actual operating conditions of high-pressure NF membrane under high TDS, including feed water pressure, differential pressure, and sulfate rejection rate. The result shows that the system achieved a stable salt separation effect after 240 days operation, the sulfate rejection rate is greater than 99.7%, Chloride rejection rate is 1.2%. But due to the continuous cyclic concentration of COD, the feed water pressure increases from the initial 2.22Mpa to 3.72Mpa, at the same time, the study shows that 34mil spacer has obvious advantages over 28mil spacer on differential pressure.

钱泰宇（1990— )，男，江苏南通人，主要研究方向为反渗透膜及纳滤膜的应用研究

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