氨-煤混燃模式下低温受热面腐蚀行为研究

韩阳; 李佳奇; 刘平; 孔梦迪; 刘延杰; 王毅斌; 谭厚章

doi:10.19666/j.rlfd.202504064

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氨-煤混燃模式下低温受热面腐蚀行为研究

新型发电技术 | 更新时间：2026-06-12

- 氨-煤混燃模式下低温受热面腐蚀行为研究
- 氨-煤混燃模式下低温受热面腐蚀行为研究
- 热力发电 2026年55卷第3期页码：150-157
- 作者机构：
  
  1. 中国神华能源股份有限公司广东分公司
  2. 国家能源投资集团有限责任公司
  3. 烟台龙源电力技术股份有限公司
  4. 西安交通大学热流科学与工程教育部重点实验室
- 作者简介：
- 基金信息：
  
  国家自然科学基金（51906198）~~
- DOI：10.19666/j.rlfd.202504064
  中图分类号： TM621
- 纸质出版：2026
- 稿件说明：
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[1]韩阳,李佳奇,刘平,等.氨-煤混燃模式下低温受热面腐蚀行为研究[J].热力发电,2026,55(03):150-157.
[1]韩阳,李佳奇,刘平,等.氨-煤混燃模式下低温受热面腐蚀行为研究[J].热力发电,2026,55(03):150-157. DOI： 10.19666/j.rlfd.202504064.

DOI：10.19666/j.rlfd.202504064.

摘要

氨-煤混燃发电模式能够显著降低机组的碳排放水平，但当掺氨量过高、混氨/纯氨燃烧器布置不当以及氨煤混燃效果不佳时，逃逸的氨气在低温下会同SO

/SO

发生反应，增加低温受热面发生腐蚀和积灰堵塞的风险。因此，开展了250℃和150℃下NH

-SO

-O

-H_2O(g)-N

氧化性气氛中20号钢和ND钢试样的168 h连续腐蚀实验，主要探究温度、NH

体积分数和飞灰涂覆对金属试样腐蚀速率的影响，并对腐蚀后金属试样和灰样进行了微观形貌和矿化物相分析。结果表明：氨气体积分数从0.002 5%增至0.005 0%

ND钢试样的平均腐蚀速率下降了58%；涂灰20号钢则是在NH

体积分数为0.005%的气氛下腐蚀速率明显加快，其平均腐蚀速率达到0.003 6 mg/(cm

.h)；升高温度显著加快了腐蚀速率，涂灰ND钢在250℃下的平均腐蚀速率最快，达到0.011 2 mg/(cm

.h);250℃，ND钢涂灰灰样中检测出新生成的CaSO

，其可能促进了灰颗粒之间的黏连；在150℃下涂灰20号钢腐蚀后灰样出现了严重的板结团聚现象，其主要是由于新生成的NH_4HSO

和(NH

)_2SO

促进了灰颗粒间的团聚效应；未来燃煤机组大比例掺烧氨气后，尤其是燃用中、高硫煤时，需要特别关注飞灰特性变化和低温受热面发生积灰腐蚀风险。

Abstract

Ammonia-coal co-firing mode for power generation can significantly reduce the carbon emission level of the unit. But when the ammonia blending ratio is too high

the ammonia blending/pure ammonia burner is not properly arranged

and the ammonia-coal co-combustion effect is not good

the escaped ammonia will react with SO

/SO

at low temperature

increasing the risk of corrosion and fouling on low temperature heating surfaces. To solve this problem

168

-hour continuous corrosion experiments of No.20 and ND steel specimens in an oxidizing atmosphere of NH

-SO

-O

-CO

-H_2O_((g))-N

at 250 ℃ and 150 ℃ were carried out. The effects of temperature

volume fraction and fly ash coating on the corrosion rate of metal specimens were mainly investigated

and the corroded metal specimens and ash samples were analyzed in terms of micro-morphology and mineral phase. The experimental results showed that the average corrosion rate of ND steel specimens decreased by 58% when the volume fraction of ammonia was increased from 0.002 5% to 0.005 0%. The corrosion rate of No.20 steel coated with fly ash was significantly accelerated in the atmosphere of NH

with volume fraction of 0.005%

and the average corrosion rate reached 0.003 6 mg/(cm

·h). Elevating temperature significantly accelerated the corrosion rate. ND steel coated with fly ash showed the fastest average corrosion rate at 250 ℃(0.011 2 mg/(cm

·h)). At 250 ℃

CaSO

was newly generated and it was detected in the ND steel-coated ash samples

which may have promoted adhesion among ash particles. After the corrosion of No.20 steel coated with fly ash at 150 ℃

the ash sample had a serious agglomeration effect

which is mainly due to the newly generated NH

HSO

and(NH

)_2SO

promoting the agglomeration effect among ash particles. In the future

when a large proportion of ammonia is mixed with coalfired units

especially when medium and high sulfur coal is used

special attention should be paid to the change of fly ash characteristics and the risk of fouling and corrosion on low temperature heating surfaces.

关键词

Keywords

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