广东电力2018，Vol.31Issue(1)：11-16,6.DOI:10.3969/j.issn.1007-290X.2018.001.003
二次再热机组加热锅炉二次风的抽汽过热度利用系统
Steam Extraction Superheat Degree Utilization System of Secondary Air of Heating Boiler of Secondary Reheat Unit
摘要
Abstract
In allusion to the problem of low efficiency of the unit caused by great pressure loss of the first steam extraction of the conventional steam extraction superheat degree utilization system of the secondary reheat unit,the paper proposes to use a secondary air steam extraction superheat degree utilization system of the reheating boiler.It builds thermal dynamic models for the conventional utilization system and the proposed utilization system for the unit so as to calculate and compare changes of thermal parameters and economy indexes under different conditions.Corresponding results indicate that compared with the scheme of external steam cooler,this secondary air scheme of heating boiler can both effectively reduce steam extraction superheat degree and improve secondary air temperature by nearly 40 ℃ as well as reduce coal source loss by nearly 24 MW and generation coal consumption of the unit by 0.36 g/(kWh)under the condition of turbine heat acceptance(THA).In ad-dition,under the condition of medium and low load,cold source loss and generation coal consumption rate of the unit in-crease slightly,which has reduced energy saving effect.关键词
二次再热/抽汽过热度/锅炉二次风/冷源损失/发电煤耗率Key words
secondary reheat/steam extraction superheat degree/boiler secondary air/cold source loss/generation coal con-sumption rate分类
能源科技引用本文复制引用
赵家毅,李千军,杨涛,苏世玮..二次再热机组加热锅炉二次风的抽汽过热度利用系统[J].广东电力,2018,31(1):11-16,6.基金项目
国家重点基础研究发展计划(973)资助项目(2015CB251504) （973）
