Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower
The article undertakes the very important topic of the long-term durability of concrete in a natural draft concrete cooling tower with flue gas injection. The corrosive conditions, including temperature, relative humidity, and CO<sub>2</sub> and SO<sub>2</sub> gas concentrati...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-06-01
|
Series: | Materials |
Subjects: | |
Online Access: | https://www.mdpi.com/1996-1944/12/13/2038 |
id |
doaj-0134b986d1d049f4a4850e83b00565e3 |
---|---|
record_format |
Article |
spelling |
doaj-0134b986d1d049f4a4850e83b00565e32020-11-25T00:12:12ZengMDPI AGMaterials1996-19442019-06-011213203810.3390/ma12132038ma12132038Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling TowerJianmin Du0Wenjuan Zhuang1Guo Li2Pei Zhang3Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaJiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaJiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaJiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaThe article undertakes the very important topic of the long-term durability of concrete in a natural draft concrete cooling tower with flue gas injection. The corrosive conditions, including temperature, relative humidity, and CO<sub>2</sub> and SO<sub>2</sub> gas concentrations, near the inner wall of a cooling tower with flue gas injection were monitored in real time to obtain the long-term durability performance of concrete. The pH and chemical compositions of the condensed liquid that adhered to the tower’s inner face and the macromorphology, compressive strength, and neutralization depth of in situ specimens were tested periodically. In addition, a finite element numerical simulation was conducted to simulate and verify the concentration distributions of CO<sub>2</sub> and SO<sub>2</sub> in the flue gas in the cooling tower. The results showed that the cleaned flue gas was enveloped, diluted, and uplifted by hot vapor in the cooling tower, and its concentration decreased. Meanwhile, the effective diffusion radius increased gradually as the flue gas rose. With the same elevation in the cooling tower, the concentration of flue gas decreased rapidly from the central point to the surrounding area. The air near the inner surface of the cooling tower was merely dampened air with a low concentration of acidic gas due to the gigantic diameter of the cooling tower. As a result, the injection of cleaned flue gas will not evidently increase the corrosion risk in a natural draft concrete cooling tower.https://www.mdpi.com/1996-1944/12/13/2038cooling towerconcreteflue gas injectiondurability monitoringnumerical simulation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jianmin Du Wenjuan Zhuang Guo Li Pei Zhang |
spellingShingle |
Jianmin Du Wenjuan Zhuang Guo Li Pei Zhang Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower Materials cooling tower concrete flue gas injection durability monitoring numerical simulation |
author_facet |
Jianmin Du Wenjuan Zhuang Guo Li Pei Zhang |
author_sort |
Jianmin Du |
title |
Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower |
title_short |
Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower |
title_full |
Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower |
title_fullStr |
Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower |
title_full_unstemmed |
Influence of Flue Gas Injection on the Long-Term Durability of a Natural Draft Concrete Cooling Tower |
title_sort |
influence of flue gas injection on the long-term durability of a natural draft concrete cooling tower |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-06-01 |
description |
The article undertakes the very important topic of the long-term durability of concrete in a natural draft concrete cooling tower with flue gas injection. The corrosive conditions, including temperature, relative humidity, and CO<sub>2</sub> and SO<sub>2</sub> gas concentrations, near the inner wall of a cooling tower with flue gas injection were monitored in real time to obtain the long-term durability performance of concrete. The pH and chemical compositions of the condensed liquid that adhered to the tower’s inner face and the macromorphology, compressive strength, and neutralization depth of in situ specimens were tested periodically. In addition, a finite element numerical simulation was conducted to simulate and verify the concentration distributions of CO<sub>2</sub> and SO<sub>2</sub> in the flue gas in the cooling tower. The results showed that the cleaned flue gas was enveloped, diluted, and uplifted by hot vapor in the cooling tower, and its concentration decreased. Meanwhile, the effective diffusion radius increased gradually as the flue gas rose. With the same elevation in the cooling tower, the concentration of flue gas decreased rapidly from the central point to the surrounding area. The air near the inner surface of the cooling tower was merely dampened air with a low concentration of acidic gas due to the gigantic diameter of the cooling tower. As a result, the injection of cleaned flue gas will not evidently increase the corrosion risk in a natural draft concrete cooling tower. |
topic |
cooling tower concrete flue gas injection durability monitoring numerical simulation |
url |
https://www.mdpi.com/1996-1944/12/13/2038 |
work_keys_str_mv |
AT jianmindu influenceoffluegasinjectiononthelongtermdurabilityofanaturaldraftconcretecoolingtower AT wenjuanzhuang influenceoffluegasinjectiononthelongtermdurabilityofanaturaldraftconcretecoolingtower AT guoli influenceoffluegasinjectiononthelongtermdurabilityofanaturaldraftconcretecoolingtower AT peizhang influenceoffluegasinjectiononthelongtermdurabilityofanaturaldraftconcretecoolingtower |
_version_ |
1725400579178496000 |