热电厂新型生水加热系统研究
李志远¹，刘国友²，庞博²，刘鑫辉²，李建高²，程世军²，夏云东²，桑秀军²
（1. 中国电力工程顾问集团中南电力设计院有限公司，湖北 武汉 430071；2. 华能沁北发电有限责任公司，河南 济源 454660）
摘要： 为满足除盐水制备系统的工艺要求，热电厂通常设置生水加热系统。常规生水加热系统使用蒸汽对原水进行
加热升温，蒸汽与原水换热的温差较大，不利于机组热经济性的提高。为此提出一种利用热网循环水回水对原水加热的
新型生水加热系统，可利用热网循环水回水余热，换热温差小，利于机组热经济性提高。按照300 t/h 补水量计算，每年
可增加收益1.65×10⁵元，具有显著的经济效益，推荐具备条件的热电厂采用。
关键词： 热电厂；生水加热；热网循环水回水；热经济性
中图分类号： TM621     文献标识码： A     文章编号： 2095-0802-(2021)05-0071-03
Study on New Raw Water Heating System in Thermal Power Plant
LI Zhiyuan1, LIU Guoyou2, PANG Bo2, LIU Xinhui2, LI Jiangao2, CHENG Shijun2, XIA Yundong2, SANG Xiujun2
(1. Central Southern China Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group Corporation,
Wuhan 430071, Hubei, China; 2. Huaneng Qinbei Power Generation Co., Ltd., Jiyuan 454660, Henan, China)
Abstract: In order to meet the operation requirements form the demineralized water preparation system, a raw water heating
system will be equipped for a thermal power plant. A common raw water heating system is to use auxiliary steam heating. But the
temperature difference of the raw water and auxiliary steam is big and is not good for improving the unit thermal efficiency. So this
paper proposed a new raw water heating system，which can use the circulating backwater for heat distribution system to heat the
raw water. The residual heat of the circulating backwater for heat distribution system can be used, and the heat exchange
temperature difference is small, which is beneficial to the improvement of the heat economy of the unit. If the make-up water flow
is 300 t/h，the annual income can be increased by 1.65×10⁵ yuan, which has significant economic benefits and is recommended for
thermal power plants with conditions.

Key words: thermal power plant; raw water heating; circulating backwater for heat distribution system; thermal efficiency