膜科学与技术

太阳能真空膜蒸馏和肥料汲取液正渗透处理RO浓水的节能性和经济性分析

作者：刘娟，田军仓，李明

单位： 1. 宁夏大学建筑学院，银川 750021；2. 宁夏大学土木与水利工程学院，银川 750021；3. 宁夏节水灌溉与水资源调控工程技术研究中心，银川 750021；4. 旱区现代农业水资源高效利用工程研究中心，银川 750021；5. 宁夏大学基建处，银川 750021

关键词：太阳能真空膜蒸馏 ; 肥料汲取液正渗透 ; 反渗透浓水 ; 经济性 ; 节能性

DOI号：

分类号： TQ028；X703.1

出版年,卷(期):页码： 2024,44(4):178-189

摘要：

针对太阳能真空膜蒸馏（Solar Vacuum Membrane Distillation，SVMD）和肥料汲取液正渗透（Fertilizer Draw Forward Osmosis，FDFO）系统处理反渗透浓水的试验研究较多，而对其能耗和经济性分析的较少。论文通过对试验规模和工业规模条件下两种系统的膜通量、能耗和成本进行对比分析，结果表明在试验规模条件下，将RO浓水浓缩4倍，无辅助热源SVMD系统的膜通量为2.46 kg/(m2·h)，比能耗为110.6 kWh/m3，单位水生产成本为96.6元/m3；有辅助热源SVMD系统的膜通量为3.75 kg/(m2·h)，比能耗为230.7 kWh/m3，单位产水成本为13.4元/m3；FDFO系统的膜通量3.62 kg/(m2·h)，比能耗为20.44 kWh/m3，单位产水成本为21.03元/m3。在工业化规模条件下，设计产水量均为240 m3/d时，SVMD系统比能耗为12.8 kWh/m3，单位产水成本为10.8元/m3，FDFO系统比能耗为12 kWh/m3，单位产水成本为9.38元/m3。可见生产规模越大，不同系统的产水成本越小，差别也越小。

There are many experimental studies on the treatment of reverse osmosis concentrate by solar vacuum membrane distillation (SVMD) and fertilizer draw forward osmosis (FDFO) systems, but few on the energy consumption and economic analysis. Through the comparative analysis of the membrane flux, energy consumption and economic analysis of the two systems under the conditions of experimental scale and industrial scale, the results show that under the condition of experimental scale, the RO concentrated water is concentrated by 4 times, the membrane flux of the SVMD system without auxiliary heat source is 2.46 kg/(m2·h), the specific energy consumption is 110.6 kWh/m3, and the unit water production cost is 96.6 yuan/m3; the membrane flux of the SVMD system with auxiliary heat source is 3.75 kg/(m2·h), the specific energy consumption is 230.7 kWh/m3, and the unit water production cost is 13.4 yuan/m3; the membrane flux of the FDFO system is 3.62 kg/(m2·h), the specific energy consumption is 20.44 kWh/m3, and the unit water production cost is 21.03 yuan/m3. Under the condition of industrial scale, when the design water output is 240m3/d, the specific energy consumption of the SVMD system is 12.8 kWh/m3, and the unit water production cost is 10.8 yuan/m3, and the specific energy consumption of the FDFO system is 12 kWh/m3, and the unit water production cost is 9.38 yuan/m3. It can be seen that the larger the production scale, the smaller the water production cost of different systems, and the smaller the difference.

基金项目：

宁夏自然科学基金（2020AAC03038）；国家重点研发计划（2021YFD1900605）；宁夏高等学校一流学科建设项目（NXYLXK2023A03）

作者简介：

刘娟（1980-），女，宁夏银川人，副教授，研究方向为苦咸水处理方面。

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