火电厂废水回用的方式及技术要点

Recovery Use Ways and Main Technical Points of Waste Water of Thermal Power Plants

文章分析了火电厂废水的特点,提出了火电厂废水新的分类方法(如将废水分成无需脱盐处理、需要脱盐处理、可循环使用和不能回用等4类);分析了火电厂各类废水的回用现状;讨论了废水的回用方式(如低含盐量、高含盐量废水的回用和其他废水的回用);指出了废水综合利用的技术要点,特别强调了废水综合利用的关键是在提高灰水比和循环水浓缩倍率的基础上使高含盐量的废水量与冲灰系统的补水量相匹配。

This article analyzes the features of waste water of thermal power plants and puts forward the new categorizing method of waste water of thermal power plants,for example, to categorize the rich and lean as：needn＇t desalination treatment, need desalination treatment, can be cyclicly used and can＇t be reused etc.four categories.This article also analyzes the present reuse status of different kinds of waste water of thermal power plants;discusses the reuse ways of waste water（such as reuse ways of low salt content waste water,high salt content waste water and reuse of other waste water;indicates the main technical points of comprehensive utilization of waste water,emphasizes especially,the key to the comprehensive utilization of waste water is to match the high salt content waste water quantity with the make-up water of ash sluicing system on the basis of raising ash-water ratio and concentration ratio of circulating water.