Performance Evaluation Test of Low-Pressure Economizer and Corrected Calculation Method of Energy Saving Effect

Xuedong WANG; Mingchao JIANG; Ang SONG

doi:10.12096/j.2096-4528.pgt.19101

English Version Reader LoginJournal Login

您当前的位置：

首页 >

文章列表页 >

Performance Evaluation Test of Low-Pressure Economizer and Corrected Calculation Method of Energy Saving Effect

Power Generation and Enviromental Protection | 更新时间：2025-07-04

- Performance Evaluation Test of Low-Pressure Economizer and Corrected Calculation Method of Energy Saving Effect
- Power Generation Technology Vol. 42, Issue 2, Pages: 280-287(2021)
- 作者机构：
  
  华电电力科学研究院有限公司, 浙江省杭州市 310030
- 作者简介：
- 基金信息：
- DOI：10.12096/j.2096-4528.pgt.19101
  CLC： TK223.33;TM621
- Received：05 February 2020，
  
  Published：30 April 2021
- 稿件说明：
移动端阅览
Xuedong WANG, Mingchao JIANG, Ang SONG. Performance Evaluation Test of Low-Pressure Economizer and Corrected Calculation Method of Energy Saving Effect[J]. Power Generation Technology, 2021, 42(2): 280-287.
DOI：

Xuedong WANG, Mingchao JIANG, Ang SONG. Performance Evaluation Test of Low-Pressure Economizer and Corrected Calculation Method of Energy Saving Effect[J]. Power Generation Technology, 2021, 42(2): 280-287. DOI： 10.12096/j.2096-4528.pgt.19101.

摘要

燃煤机组锅炉尾部烟道中的低压省煤器能够降低锅炉排烟温度，起到节能降耗的作用，但节能效果的影响因素众多，使得低压省煤器的性能鉴定与分析评价存在着不确定性。在某220MW机组上进行了4个电负荷条件下，不同低压省煤器运行方式、运行参数，共24个工况的节能效果评价试验。利用热力性能试验法，以及拟合的汽轮机主蒸汽流量与低压省煤器节能效果曲线，计算了低压省煤器的节能效果。在4个电负荷对应的主蒸汽流量下，低压省煤器的节能效果分别为116.8、96.7、108.2、99.1kJ/（kW·h）。通过变化低压省煤器的运行参数，得到不同电负荷工况下低压省煤器节能效果的变化范围。根据低压省煤器的热平衡方程和传热方程，计算其设计换热量和实际换热量，利用等效焓降法修正计算了低压省煤器运行参数对节能效果的影响。220MW试验工况下，节能效果的试验值为116.8kJ/（kW·h），参数修正后为190.97kJ/（kW·h）。

Abstract

The low-pressure economizer installed in the tail flue of coal burning boiler can reduce temperature of boiler discharge smoke

thus saving energy and reducing consumption. There are many factors affecting the energy saving effect of low-pressure economizer

which makes the performance evaluation and analysis uncertain. Performance evaluation test of energy saving effect of low-pressure economizer was carried out on a 220 MW unit. Under 4 electrical loads

a total of 24 conditions were tested with different operating modes and operating parameters of the low-pressure economizer. Using thermal performance test method

and the fitted curve of steam turbine main steam flow with energy saving effect

the energy saving effect of low-pressure economizer had been calculated. Under main steam flow corresponding to 4 electrical loads

the energy saving effect was 116.8

96.7

108.2 and 99.1kJ/(kW·h)

respectively. By changing operating parameters of the low-pressure economizer

variation range of energy saving effect under different electric load conditions was obtained. According to heat balance equation and heat transfer equation

design heat transfer amount and actual heat exchange amount of the low-pressure economizer were calculated. The impact of operating parameters of low-pressure economizer on energy saving was calculated by using the equivalent enthalpy drop method. Under 220MW test condition

the test value of energy saving effect was 116.8kJ/(kW·h)

and was 190.97kJ/(kW·h) after parameter being modified.

关键词

Keywords

references

刘鹤忠, 连正权. 低温省煤器在火力发电厂中的运用探讨[J]. 电力勘测设计, 2010(4): 32-38.

LIU H Z, LIAN Z Q. Application of low temperature saving coal device in generate electricity power plant[J]. Electric Power Survey&Design, 2010(4): 32-38.

黄嘉驷, 李杨. 低压省煤器水侧系统连接方案优化分析[J]. 热力发电, 2011, 40(3): 62-64.

HUANG J S, LI Y. Analysis of optimization in connecting scheme of water side system for low-pressure economizer[J]. Thermal Power Generation, 2011, 40(3): 62-64.

马金祥, 陈军. 低温省煤器在火力发电厂中的优化设计[J]. 华电技术, 2016, 38(7): 15-19.

MA J X, CHEN J. Optimal design of low temperature economizer in thermal power plant[J]. Huadian Technology, 2016, 38(7): 15-19.

李允超, 赵大周, 刘博, 等. 火电厂烟气余热利用现状与展望[J]. 发电技术, 2019, 40(3): 270-275.

LI Y C, ZHAO D Z, LIU B, et al. Status and prospect of waste heat utilization in power plant[J]. Power Generation Technology, 2019, 40(3): 270-275.

王秀红, 盛伟, 刘全山. 电站锅炉烟气余热利用技术方案研究[J]. 发电技术, 2019, 40(3): 276-280.

WANG X H, SHENG W, LIU Q S. Study on technical scheme of flue gas waste heat utilization in utility boiler[J]. Power Generation Technology, 2019, 40(3): 276-280.

王学栋, 仲昭伟, 董洋, 等. 多变量因素下的锅炉低压省煤器节能效果测试与分析[J]. 发电技术, 2018, 39(2): 140-145.

WANG X D, ZHONG Z W, DONG Y, et al. Analysis on energy saving effect of low-pressure economizer in boiler under multi-variable factors[J]. Power Generation Technology, 2018, 39(2): 140-145.

周新军, 房林铁, 张红方, 等. 330MW机组增装低压省煤器及经济性分析[J]. 节能, 2011, 347(6): 16-20.

ZHOU X J, FANG L T, ZHANG H F, et al. Installation of low pressure economizer in 330MW unit and economic analysis[J]. Energy Conservation, 2011, 347(6): 16-20.

俞启云, 刘志敏, 李刚. 超临界600MW机组低压省煤器改造热经济性分析[J]. 发电与空调, 2016, 37(2): 33-35.

YU Q Y, LIU Z M, LI G. Thermal economic analysis of the low pressure coal saving device in supercritical 600MW unit[J]. Power Generation&Air Condition, 2016, 37(2): 33-35.

胡秀涛. 燃气−蒸汽联合循环余热锅炉尾部烟气余热利用方式及经济性分析[J]. 发电与空调, 2017, 38(3): 43-46.

HU X T. Methods and economic analysis of waste heat recovery from gas steam combined cycle waste heat boiler flue gas[J]. Power Generation&Air Condition, 2017, 38(3): 43-46.

刘传玲, 柳明辉, 陈振江, 等. 投运低压省煤器后汽轮机背压变化分析[J]. 发电技术, 2018, 39(4): 378-381.

LIU C L, LIU M H, CHEN Z J, et al. Analysis on the change of steam turbine back pressure under operation of low pressure economizer[J]. Power Generation Technology, 2018, 39(4): 378-381.

黄新元, 孙奉仲, 史月涛. 火电厂热系统增设低压省煤器的节能效果[J]. 热力发电, 2008, 37(3): 56-58.

HUANG X Y, SUN F Z, SHI Y T. Energy-saving effect of additionally installed low-pressure economizer in thermodynamic system of thermal power plant[J]. Thermal Power Generation, 2008, 37(3): 56-58.

韩爽, 王伟锋, 张朋飞, 等. 加装低压省煤器机组节能效果分析[J]. 热力发电, 2015, 44(12): 133-135.

HAN S, WANG W F, ZHANG P F, et al. An analyzing example for unit energy-saving with low-pressure economizer[J]. Thermal Power Generation, 2015, 44(12): 133-135.

林万超. 火电厂热系统节能理论[M]. 西安: 西安交通大学出版社, 1994.

LIN W C. Energy saving theory of thermal system in thermal power plant[M]. Xi'an, China: Xi'an Jiaotong University Press, 1994.

周振起, 李晓东. 热力系统局部定量计算方法的研究[J]. 华东电力, 2013, 41(6): 1364-1367.

ZHOU Z Q, LI X D. Method for local quantitative calculation of thermal system[J]. East China Electric Power, 2013, 41(6): 1364-1367.

张红方, 王勇, 田松峰, 等. 基于等效焓降法的低压省煤器系统经济性分析[J]. 节能技术, 2011, 29(5): 457-461.

ZHANG H F, WANG Y, TIAN S F, et al. Economic analysis of low pressure economizer system based on the equivalent enthalpy drop method[J]. Energy Conservation Technology, 2011, 29(5): 457-461.

温山, 闫维平, 常建刚, 等. 双级低压省煤器技术及其经济性分析[J]. 热力发电, 2013, 42(2): 7-11.

WEN S, YAN W P, CHANG J G, et al. Two-stage low pressure economizer and its economic analysis[J]. Thermal Power Generation, 2013, 42(2): 7-11.

康晓妮, 马文举, 马涛, 等. 320 MW机组加装低温省煤器的经济性研究[J]. 热力发电, 2012, 41(5), 8-11.

KANG X N, MA W J, MA T, et al. Economic study on adding low-temperature economizer on a 320MW unit[J]. Thermal Power Generation, 2012, 41(5): 8-11.

周洲, 刘楠. 低温省煤器节能效果评价方法[J]. 华电技术, 2018, 40(4): 28-29.

ZHOU Z, LIU N. Evaluation method of energy saving effect of low temperature economizer[J]. Huadian Technology, 2018, 40(4): 28-29.

马记. 1000MW超超临界机组加装低温省煤器改造及热经济性分析[J]. 华电技术, 2018, 40(10): 37-39.

MA J. Transformation and thermal economy analysis on 1000MW ultra supercritical unit with low temperature fuel economizer[J]. Huadian Technology, 2018, 40(10): 37-39.

任彬. 600MW超临界机组锅炉省煤器分级优化改造[J]. 华电技术, 2019, 41(2): 69-72.

REN B. Classification and optimizing retrofit of economizer for 600MW supercritical boilers[J]. Huadian Technology, 2019, 41(2): 69-72.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Analysis on Energy Saving Effect of Low-Pressure Economizer in Boiler Under Multi-variable Factors

Related Author

Zhaowei ZHONG

Yang DONG

Tongbing ZHU

Xuedong WANG

YANG Yonglong

HU Da

WANG Fengji

LI Jing

Related Institution

Huadian Electric Power Research Institute Co., LTD, Hangzhou City

Huadian Longkou Power Generation Co., LTD, Longkou City

Huadian Electric Power Research Institute

AI问答

⁰