Experimental Study on the Influencing Factors of Low Temperature Corrosion of H-Type Finned Tube Heat Exchangers

doi:10.7652/xjtuxb201703010

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Experimental Study on the Influencing Factors of Low Temperature Corrosion of H-Type Finned Tube Heat Exchangers

更新时间：2025-07-09

- Experimental Study on the Influencing Factors of Low Temperature Corrosion of H-Type Finned Tube Heat Exchangers
- Vol. 51, Issue 3, Pages: 54-61(2017)
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201703010
  CLC： TK172.3
- Online First：10 March 2017，
  
  Published：2017
- 稿件说明：
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Experimental Study on the Influencing Factors of Low Temperature Corrosion of H-Type Finned Tube Heat Exchangers[J]. 2017, 51(3): 54-61.
DOI：

Experimental Study on the Influencing Factors of Low Temperature Corrosion of H-Type Finned Tube Heat Exchangers[J]. 2017, 51(3): 54-61. DOI： 10.7652/xjtuxb201703010.

摘要

为研究换热器的低温腐蚀

搭建了换热器烟气低温腐蚀实验台。实验台可模拟烟气环境并实现多种因素的定量控制。以工业余热回收中常用的H型翅片管为对象

进行了H型翅片管换热器烟气低温腐蚀影响因素的实验研究。观察并分析了H型翅片管在不同壁面温度下的表面形貌变化以及腐蚀产物

得到了不同烟气流量、烟气温度、烟气酸体积分数以及壁面温度对应的酸沉积速率。结果表明:壁面温度低于水蒸气露点时腐蚀较为严重

腐蚀机理为吸氧腐蚀; 烟气流量、烟气温度、烟气酸体积分数以及壁面温度对酸沉积速率均有不同程度的影响; 随着烟气酸体积分数从10×10

-6

增加到50×10

-6

酸沉积速率从2.50×10

-7

mol?m

-2

-1

近似线性增加到7.03×10

-7

mol?m

-2

-1

; 随着壁面温度从80 ℃降低到50 ℃

酸沉积速率从3.06×10

-7

mol?m

-2

-1

增大到1.75×10

-6

mol?m

-2

-1

当壁面温度继续降低时

沉积的酸一部分被冷凝水带走

导致测得的酸沉积速率减小; 酸雾的生成和黏附对酸沉积速率有较大的影响。研究结果对开发抗低温腐蚀技术、改善烟气余热利用系统提供了实验基础。

Abstract

An experimental rig was constructed for the study of low temperature corrosion of heat exchangers. The experimental rig can simulate flue gas environment and control multiple factors quantitatively. H-type finned tube heat exchangers widely used in waste heat utilization was used for the experimental study on the influencing factors of low temperature corrosion of H-type finned tube heat exchangers. The changes of surface morphology and co

rrosion products of H-type finned tube heat exchangers under different tube wall temperatures were observed and analyzed

and the condensation rates of sulphuric acid under different flue gas flux rates

flue gas temperatures

sulphuric acid volume fractions and tube wall temperatures were obtained. The results showed that H-type finned tube heat exchangers are corroded relatively badly when the tube wall temperature is lower than water vapor dewpoint and the corresponding corrosion mechanism is oxygen absorption corrosion. Flue gas flux rate

flue gas temperature

flue gas sulphuric acid volume fraction and tube wall temperature can influence the condensation rate of sulphuric acid but in different degrees. As flue gas sulphuric acid volume fraction increased from 10×10

-6

to 50×10

-6

the condensation rate of sulphuric acid increased almost linearly from 2.50×0

-7

mol·m

-2

·s

-1

to 7.03×10

-7

mol·m

-2

·s

-1

; as tube wall temperature decreased from 80 ℃ to 50 ℃

the condensation rate of sulphuric acid increased from 3.06×0

-7

mol·m

-2

·s

-1

to 1.75×0

-6

mol·m

-2

·s

-1

. When tube wall temperature decreased further

the measured condensation rate of sulphuric acid decreased because of the heat dissipation of condensed water. The formation of sulphuric acid fog and it's adhesion to the tube wall have a great impact on the condensation rate of sulphuric acid. The research results have some guiding significance for developing novel techniques to alleviate low temperature corrosion and improving flue gas waste-heat utilization systems.

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references

BP公司. BP世界能源统计 2015 [R]. 北京: BP公司, 2015.

何雅玲, 汤松臻, 王飞龙, 等. 中低温烟气换热器气侧积灰、磨损及腐蚀的研究 [J]. 科学通报, 2016, 61(17): 1858-1876.

HE Yaling, TANG Shongzhen, WANG Feilong, et al. Gas-side fouling, erosion and corrosion of heat exchanger for middle and low temperature flue gas waste heat recovery [J]. Chin Sci Bull, 2016, 61(17): 1858-1876.

MOAKHAR R S, MEHDIPOUR M, GHORBANI M, et al. Investigations of the failure in boilers economizer tubes used in power plants [J]. Journal of Materials Engineering Performance, 2013, 22(9): 2691-2697.

李飞, 孙奉仲, 史月涛. 积灰与酸耦合作用下套管换热器传热特性热态实验 [J]. 化工学报, 2014(8): 2876-2881.

LI Fei, SUN Fengzhong, SHI Yuetao. Hot-state experiment on double-pipe heat exchanger under coupled effect of fouling and acid [J]. CIESC Journal, 2014, 65(8): 2876-2881.

CHENG X Q, SUN F L, LV S J, et al. A new steel with good low-temperature sulfuric acid dew point corrosion resistance [J]. Materials Corrosion, 2012, 63(7): 598-606.

DÍAZ E F, SERNA S, PORCAYO-CALDERON J, et al. Corrosion performance of a novel NiAl-Cu intermetallic HVOF protective coating: part I Low temperature corrosion in 0.5 M H2SO4 [J]. International Journal of Electrochemical Science, 2013, 8(5): 7156-7174.

TAYLOR H D. The condensation of sulphuric acid on cooled surfaces exposed to hot gases containing sulphur trioxide [J]. Transactions of the Faraday Society, 1951, 47(47): 1114-1120.

赵钦新, 张知翔, 杜文智, 等. 模拟气氛下硫酸露点的腐蚀试验研究 [J]. 动力工程学报, 2012, 32(5): 420-424.

ZHAO Qinxin, ZHANG Zhixiang, DU Wenzhi, et al. Experimental study on sulfuric acid dewpoint corrosion in simulated atmospheric conditions [J]. Journal of Chinese Society of Power Engineering, 2012, 32(5): 420-424.

MOSKOVITS P. Low-temperature boiler corrosion and deposits: a literature review [J]. Industrial Engineering Chemistry, 2002, 51(10): 1305-1312.

韩辉, 何雅玲, 唐桂华. 硫酸蒸气在换热器表面沉积特性的数值研究 [J]. 西安交通大学学报, 2013, 47(11): 7-13.

HAN Hui, HE Yaling, TANG Guihua. Numerical study on deposition characteristics of sulphuric acid vapor on heat exchanger surfaces [J]. Journal of Xi'an Jiaotong University, 2013, 47(11): 7-13.

龚敏. 金属腐蚀理论及腐蚀控制 [M]. 北京: 化学工业出版社, 2009: 222-223.

WILSON R W. Condensation of sulfuric acid and water mixtures in laminar flow [D]. Bethlehem, USA: Lehigh University, 1989.

ZHANG Z T. Mass transfer processes in flow passages of rotating regenerative air preheaters [D]. Bethlehem, USA: Lehigh University, 1991.

HOLMES D R. Dewpoint corrosion [M]. Birmingham, Britain: Institution of Corrosion Science and Technology, 1985: 145-146.

VERHOFF F H, BANCHERO J T. Predicting dew points of flue gases [J]. Chemical Engineering Progress, 1974, 70(8): 71-72.

GMITRO J I, VERMEULEN T. Vapor-liquid equilibria for aqueous sulfuric acid [J]. AIChE Journal, 1964, 10(5): 740-746.

ROSNER D E, ARIAS-ZUGASTI M. Estimating transport-shifted acid dew-point surface temperatures and conditions for the avoidance of acid mists in energy recovery operations [J]. Chemical Engineering Science, 2012, 75: 243-249.

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