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水库水作为锅炉补给水源的设计 预览

Design of reservoir water as boiler feed water source
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摘要 本文以某超临界直接空冷机组电厂锅炉补给水系统选型计算为例,介绍了电厂锅炉补给水的选型过程。该电厂以水库水作为水源,设计产水量为150m~3/h,主要工艺流程为:原水—多介质过滤器—超滤—反渗透—离子交换除盐。本文主要介绍对该项目除盐水系统的选择,比较了几种目前电厂常用的锅炉补给水的处理工艺方法,最终选择双膜法+离子交换为最终方案。反渗透预处理工艺的选择,分析了原水水质情况,确定除反渗透预处理常规控制参数外,钡离子造成的结垢倾向为此次反渗透预处理的主要控制对象,选出多介质过滤器+超滤作为反渗透的预处理,并对多介质过滤器及超滤的设备的计算结果做了介绍,对设备本身的布置做了优化设计,如在多介质过滤器正冲排放口增加手动阀门。反渗透的工艺设计,结合设计软件和设计经验,对反渗透进行了选型计算,对反渗透的设备进行了优化,如在反渗透浓水回收口增加止回阀。离子交换工艺设计,介绍了离子交换工艺选型中遇到的问题,对离子交换工艺设备进行了改进,如利用多孔板水帽+树脂捕捉器代替原来一级除盐系统的垫层。该项目目前的运行情况及总结,分析了该项目目前存在的问题是阻垢剂未起到阻垢的作用,建议更换阻垢剂。 This paper takes the calculation of the boiler feed water system of a supercritical direct air cooling unit as an example, and introduces the selection process of the boiler feed water in power plants. The power plant uses reservoir water as the water source, and the designed water production is 150 m~3/h. The main process flow is: raw water-multi-media filter-ultrafiltration-reverse osmosis-ion exchange demineralization. This paper mainly introduces the choice of demineralized water system for this project, compares several treatment methods of boiler feed water commonly used in power plants, and finally chooses double membrane method+ ion exchange as the final scheme. The choice of reverse osmosis pretreatment process, the raw water quality condition was analyzed, and the conventional control parameters of reverse osmosis pretreatment were determined. The fouling tendency caused by strontium ions was the main control object of this reverse osmosis pretreatment, and the multi-media filter was selected. +Ultrafiltration as a pretreatment for reverse osmosis, and introduced the calculation results of the multi-media filter and ultrafiltration equipment, and optimized the layout of the equipment itself, such as adding manual to the positive discharge vent of the multi-media filter.valve. Reverse osmosis process design, combined with design software and design experience, selected for reverse osmosis calculation, optimized for reverse osmosis equipment, such as adding check valves in reverse osmosis concentrated water recovery port. The ion exchange process design introduced the problems encountered in the ion exchange process selection and improved the ion exchange process equipment, such as replacing the original primary demineralization system by using a perforated plate water cap + resin trap. The current operation and summary of the project, analysis of the current problems of the project is that the scale inhibitor does not play a role in scale inhibition, it is recommended to replace the scale inhibitor.
作者 张环 冯雪菲 张利利 Zhang Huan;Feng Xuefei;Zhang Lili(Beijing North Drainage Design and Research Institute Co.,Ltd.,Beijing 100077,China;Beijing Nengtai Gaoke Environmental Protection Technology Co.,Ltd.,Beijing 100176,China)
出处 《环境与发展》 2019年第3期213-214,217共3页 Inner Mongolia Environmental Protection
关键词 过滤 超滤 反渗透 离子交换 Filtration Ultrafiltration Reverse osmosis Ion exchange
作者简介 张环(1983-),女,汉族,本科学历,工程师,研究方向为工业膜法水处理设计,市政管网及市政污水处理设计。
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