Combined application of hot primary air heater and low pressure economizer

XUE Ning; YIN Xuyang; WANG Chunchang

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Combined application of hot primary air heater and low pressure economizer

更新时间：2025-09-28

- Combined application of hot primary air heater and low pressure economizer
- Thermal Power Generation Vol. 44, Issue 2, Pages: 64-68(2015)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 浙江国华浙能发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2015
- 稿件说明：
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XUE Ning, YIN Xuyang, WANG Chunchang. Combined application of hot primary air heater and low pressure economizer[J]. Thermal power generation, 2015, 44(2): 64-68.
DOI：

XUE Ning, YIN Xuyang, WANG Chunchang. Combined application of hot primary air heater and low pressure economizer[J]. Thermal power generation, 2015, 44(2): 64-68. DOI：

摘要

介绍了一种热一次风加热器技术

该技术通过在热一次风道上增加换热设备

加热凝结水

利用凝结水回收热量

减少汽轮机抽汽量

增加汽轮机做功能力

实现节能。同时

对热一次风加热器与低压省煤器联合应用技术进行了研究

并对某600MW机组的联合应用方案进行了设计与计算。结果表明:热一次风加热器技术适用于制粉系统冷风量较大、排烟温度高且一次风机压力具有一定裕量的机组;低压省煤器技术在低负荷时节能潜力降低

而热风加热器技术随负荷降低

节能能力增强

两者联合应用方案在机组高、低负荷段均可节省供电煤耗3g/(kW·h)以上

节能效果明显。

Abstract

A hot primary air heater(HPAH)technology was introduced

which uses the heater installed on the hot primary air duct to heat condensation water

so the steam extraction amount can be reduced to increase the turbine's work ability

thus to save the energy.Moreover

the combined application of the HPAH and low pressure economizer(LPE)was studied

and the its application in a 600 MW unit was designed and calculated.The results show that

the HPAH is suitable for units with large quantity of cool air

high exhaust temperature and surplus pressure margin of primary draft fan.The energy conservation potential of the LPE is lower at low load

but the HPAH is on the contrary.The combined application of them can save net coal consumption rate by more than 3g/(kW·h)at both low and high load.

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Related Institution

School of Energy Power and Mechanical Engineering, North China Electric Power University

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Huaneng Shandong Power Generation Co.,Ltd.

Xi'an Thermal Power Research Institute Co.,Ltd.

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