Air leakage control and energy-saving application of air preheater in thermal power plants

JIN Shengxiang; He Qishan; LI Qianyu; WEI Hongqi

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Air leakage control and energy-saving application of air preheater in thermal power plants

更新时间：2025-09-28

- Air leakage control and energy-saving application of air preheater in thermal power plants
- Thermal Power Generation Vol. 43, Issue 6, Pages: 132-135(2014)
- 作者机构：
  
  1. 清华大学热能工程系
  2. 北京能源投资(集团)有限公司
  3. 东南大学热能动力实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.34
- Published：2014
- 稿件说明：
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JIN Shengxiang, He Qishan, LI Qianyu, et al. Air leakage control and energy-saving application of air preheater in thermal power plants[J]. Thermal power generation, 2014, 43(6): 132-135.
DOI：

JIN Shengxiang, He Qishan, LI Qianyu, et al. Air leakage control and energy-saving application of air preheater in thermal power plants[J]. Thermal power generation, 2014, 43(6): 132-135. DOI：

摘要

运用柔性接触式密封技术对某火电厂烟风系统三分仓回转式空气预热器(空预器)进行漏风治理和密封改造

与常规漏风治理措施相比进一步降低了空预器漏风率

在机组高负荷下空预器平均漏风率由8.350%降至4.045%

同时使供电煤耗下降约0.71g/(kW·h)

引风机和一次风机电机功率平均下降12.2%和18.85%

引风机节电率达到12.15%

一次风机节电率达到19.51%

按0.373元/(kW·h)计算

空预器漏风改造每年能节约电费227.5万元

经济效益显著。

Abstract

The flexible contact seal technology was employed to conduct air leakage control and seal transformation for tri-sectional regenerative air pre-heater in a thermal power plant.Compared with the conventional air leakage control measures

application of this technology further decreased air leakage rate of the air preheater

the average value under high unit load condition dropped from 8.35% to 4.405%.Moreover

the coal consumption rate for power supply reduced by about 0.71g/(kW·h)

the mean electric power of the induced draft fan and primary air fan decreased to 12.2% and 18.85%

respectively.Furthermore

the electric saving rate of induced draft fan reached 12.15%

that of the primary air fan went to 19.51%.Supposing the electricity price is of 0.373yuan/(kW·h)

by air leakage retrofit

the air preheater can save electricity by2.275×106 yuan yearly.

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