| 湿法脱硫后烟气腐蚀现场实验研究 |
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| 引用本文： | 潘佩媛,陈衡,焦健,梁志远,赵钦新.湿法脱硫后烟气腐蚀现场实验研究[J].化工学报,2019,70(1):161-169. |
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| 作者姓名： | 潘佩媛 陈衡 焦健 梁志远 赵钦新 |
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| 作者单位： | 西安交通大学能源与动力工程学院热流科学与工程教育部重点实验室，陕西 西安 710049 |
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| 基金项目： | 国家重点研发计划项目(2016YFC0801904);国家自然科学基金项目(51606144) |
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| 摘 要： | 基于提升排放烟羽高度以及排烟脱白的需求，必须对燃煤锅炉烟气湿法脱硫后的湿烟气进行妥当处理。但湿法脱硫后的湿烟气腐蚀性很强，将对下游设备造成严重腐蚀。本文在91 MW层燃供热锅炉湿法脱硫系统后烟道进行了现场腐蚀实验，测试和评估了5种钢材的耐腐蚀能力。实验结果表明，钢材的表面温度对腐蚀过程具有关键影响。随着表面温度的升高，钢材的腐蚀程度首先因为表面沉积物中氯离子浓度升高而加剧，然后因电解质的匮乏而减轻。
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| 关 键 词： | 煤燃烧 沉积物 烟道气 腐蚀 烟气再热器 排烟脱白 |
| 收稿时间： | 2018-03-27 |
| 修稿时间： | 2018-06-12 |
In-plant experimental study on desulfurized flue gas corrosion |
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| Peiyuan PAN,Heng CHEN,Jian JIAO,Zhiyuan LIANG,Qinxin ZHAO.In-plant experimental study on desulfurized flue gas corrosion[J].Journal of Chemical Industry and Engineering(China),2019,70(1):161-169. |
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| Authors: | Peiyuan PAN Heng CHEN Jian JIAO Zhiyuan LIANG Qinxin ZHAO |
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| Affiliation: | Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China |
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| Abstract: | Based on the need to increase the height of the exhaust plume and the whitening of the flue gas, the wet flue gas after the wet desulfurization of the flue gas of the coal-fired boiler must be properly disposed. However, the wet flue gas after wet desulfurization is very corrosive and will cause serious corrosion to downstream equipment. In this paper, in-plant corrosion tests were conducted in the flue after the wet desulphurization system in a 91 MW coal-fired travelling grate heating boiler. Five common corrosion-resistant steels including ND steel, 304 L, 316 L, 2205 and 2507 were tested and then evaluated. According to the results, surface temperature of the steel was the key factor in corrosion process. As the surface temperature increased, corrosion of the steels was first exacerbated due to the increase in Cl? concentration in the deposits and then mitigated due to the lack of the electrolyte. |
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| Keywords: | coal combustion deposition flue gas corrosion flue gas reheater exhaust fumetransparentization |
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