膜科学与技术

PVDF膜接触器在电厂含氨废水处理中的应用研究

作者：吕佳慧，戴洁，施国忠，岑易，徐浩然，冯向东，张林

单位： 1. 浙江浙能技术研究院有限公司，浙江杭州 311121；2. 浙江浙能镇海发电有限责任公司，浙江宁波 315000；3. 工业新水源技术浙江省工程研究中心，浙江杭州 311121；4. 浙江省火力发电高效节能与污染物控制技术研究重点实验室，浙江杭州311121；5. 浙江大学化学工程与生物工程学院，浙江杭州 310058

关键词：关键词：膜接触器；含氨废水；燃煤电厂；脱氮通量；聚偏氟乙烯

DOI号：

分类号： X703

出版年,卷(期):页码： 2024,44(1):123-129

摘要：

燃煤电厂含氨废水具有水量大、氨氮浓度高、水质波动大的特点，常规脱氨工艺处理困难。本文采用PVDF膜接触器处理燃煤电厂高浓含氨废水，考察了膜接触器类型、水侧流量、气侧真空度、气液接触面积、进水水质等因素对脱氮效率的影响。结果表明，基于PVDF膜接触器的气液分离工艺，能够将高浓含氨废水中的氨氮浓度由1250mg/L降至300mg/L以下；外压式和内压式膜接触器都有理想的应用效果；提高膜接触器水侧流量、气侧真空度能够有效提高NH3传质效率；增大传质膜面积能够显著提升循环液氨氮脱除率。提出了分离NH3在燃煤电厂的多种资源化回用途径，为膜接触器的工程化应用提供参考。

The ammonia-containing wastewater from coal-fired power plants has the characteristics of large water volume, high ammonia-nitrogen concentration, and large water quality fluctuations, making conventional ammonia removal processes difficult to treat. In this paper, PVDF membrane contactor was used to treat high-concentration ammonia-containing wastewater from coal-fired power plants. The effects of membrane contactor type, water flow, gas vacuum, gas-liquid contact area and influent water quality on nitrogen removal efficiency were investigated. The results show that the gas-liquid separation process based on PVDF membrane contactors can reduce the concentration of ammonia nitrogen in high-concentration ammonia containing wastewater from 1250mg/L to below 300mg/L. Both external and internal pressure membrane contactors have ideal application effects; The mass transfer efficiency of NH3 can be effectively improved by increasing the flow rate of water side and the vacuum degree of air side; Increasing the mass transfer membrane area can significantly improve the removal rate of ammonia nitrogen in circulating liquid. Multiple resource utilization pathways for separating NH3 in coal-fired power plants have been proposed, which provides reference for the engineering application of membrane contactors.

基金项目：

浙江省“领雁”计划项目(2022C03048)。

作者简介：

吕佳慧（1991-），女，浙江绍兴人，工程师，研究方向为工业水处理技术研发

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