Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage

Jiang Pengwei; Guo Yueyei; Ni Ye

doi:doi:10.11648/j.epes.20180705.11

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Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage

Jiang Pengwei, Guo Yueyei, Ni Ye

Published in American Journal of Electrical Power and Energy Systems (Volume 7, Issue 5)

Received: 24 July 2018 Accepted: 15 August 2018 Published: 15 November 2018

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Abstract

This paper introduces the technological process and operation mode of denitrification and ammonia supply in coal-fired power plants. The Selective Catalytic Reduction (SCR) flue gas denitrification technology of coal-fired power plant is a great significant to environmental protection, which denitrification efficiency is up to 90%. A coal-fired power plant SCR boiler flue gas denitrification device of ammonia controlling valves often block in the winter, and need stopping the device to carry out manual cleaning, that seriously affecting the normal operation of the SCR system and NOx emissions standards. Through the mothed of analyzing of the physical scale components of liquid ammonia quality, environmental temperature, equipment, material, jam, we had found the causes of the problem. Ammonia injection valves plug is mainly made of carbon steel rusting and ammonia supplying of inner tube in oily volatile mixed cause. According to the actual situation of the equipment in the power plant, the operation mode of liquid ammonia evaporator was adjusted, the denitrification ammonia suppling pipeline was purged, the structure of ammonia injection regulating valve was reformed, and the stainless steel-pipeline was replaced. The retrofitting reason of ammonia injection regulating valves and their structure are introduced in detail, which is the key to solve the problem.

Published in	American Journal of Electrical Power and Energy Systems (Volume 7, Issue 5)
DOI	10.11648/j.epes.20180705.11
Page(s)	56-61
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Ammonia Injection Valve Structure, Ammonia Evaporator, Blocking, Scale Sample Analysis, Improvement

References

[1]	ZHAO Yi, ZHU Hongtao, AN Xiaoling, SU Peng, Study on SCR technique for flue gas denitrification in coal-fired power plants [J], Electric Power Technology and Environmental Protection, 2009, 25 (1):7-8.
[2]	HU Yongfeng, BAI Yongfeng, SCR flue gas denitrification technology and its application [J]. Energy Conservation Technology, 2007, 25 (2):152-156.
[3]	WENG Junzhen, MAO Rongjun, WANG Gang. Analysis and treatment on block of ammonia transportation pipeline of ammonia station in denitrification system of power plant [J]. Cleaning World, 2014, 30 (3):42-45.
[4]	XING Xidong. Reason analysis and countermeasure on ammonia pipeline jam of SCR denitrification system [J]. China Environmental Protection Industry, 2015 (3):24-27.
[5]	Guide for the flue gas denitrification technology in thermal power plant (DL/T 296-2011) [S].
[6]	Liquefied anhydrous ammonia (GB536-1988) [S].
[7]	Determination of liquefied anhydrous ammonia-Part 4: Residue content titrimetric method > (GB/T 8570.4-2010) [S].
[8]	XU Shude, LU Hongyue, Cause analysis and countermeasures against ammonia supply pipeline blockage of coal-fired boiler denitrification system [J] Zhejiang Electric Power 2015, (8): 45-45.
[9]	HE Donghong. Treatment and control on pipeline blockage in SCR denitrification system [J], Electric Power of China, 2016, 49 (6): 161-165.
[10]	Sun Keqin Zhong Qin Denitrification technology and engineering application of flue gas in thermal power plant [M] Beijing: Chemical Industry Press, 2011:79-80.

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APA Style

Jiang Pengwei, Guo Yueyei, Ni Ye. (2018). Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage. American Journal of Electrical Power and Energy Systems, 7(5), 56-61. https://doi.org/10.11648/j.epes.20180705.11

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ACS Style

Jiang Pengwei; Guo Yueyei; Ni Ye. Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage. Am. J. Electr. Power Energy Syst. 2018, 7(5), 56-61. doi: 10.11648/j.epes.20180705.11

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AMA Style

Jiang Pengwei, Guo Yueyei, Ni Ye. Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage. Am J Electr Power Energy Syst. 2018;7(5):56-61. doi: 10.11648/j.epes.20180705.11

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@article{10.11648/j.epes.20180705.11,
  author = {Jiang Pengwei and Guo Yueyei and Ni Ye},
  title = {Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {7},
  number = {5},
  pages = {56-61},
  doi = {10.11648/j.epes.20180705.11},
  url = {https://doi.org/10.11648/j.epes.20180705.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20180705.11},
  abstract = {This paper introduces the technological process and operation mode of denitrification and ammonia supply in coal-fired power plants. The Selective Catalytic Reduction (SCR) flue gas denitrification technology of coal-fired power plant is a great significant to environmental protection, which denitrification efficiency is up to 90%. A coal-fired power plant SCR boiler flue gas denitrification device of ammonia controlling valves often block in the winter, and need stopping the device to carry out manual cleaning, that seriously affecting the normal operation of the SCR system and NOx emissions standards. Through the mothed of analyzing of the physical scale components of liquid ammonia quality, environmental temperature, equipment, material, jam, we had found the causes of the problem. Ammonia injection valves plug is mainly made of carbon steel rusting and ammonia supplying of inner tube in oily volatile mixed cause. According to the actual situation of the equipment in the power plant, the operation mode of liquid ammonia evaporator was adjusted, the denitrification ammonia suppling pipeline was purged, the structure of ammonia injection regulating valve was reformed, and the stainless steel-pipeline was replaced. The retrofitting reason of ammonia injection regulating valves and their structure are introduced in detail, which is the key to solve the problem.},
 year = {2018}
}

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TY  - JOUR
T1  - Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage
AU  - Jiang Pengwei
AU  - Guo Yueyei
AU  - Ni Ye
Y1  - 2018/11/15
PY  - 2018
N1  - https://doi.org/10.11648/j.epes.20180705.11
DO  - 10.11648/j.epes.20180705.11
T2  - American Journal of Electrical Power and Energy Systems
JF  - American Journal of Electrical Power and Energy Systems
JO  - American Journal of Electrical Power and Energy Systems
SP  - 56
EP  - 61
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20180705.11
AB  - This paper introduces the technological process and operation mode of denitrification and ammonia supply in coal-fired power plants. The Selective Catalytic Reduction (SCR) flue gas denitrification technology of coal-fired power plant is a great significant to environmental protection, which denitrification efficiency is up to 90%. A coal-fired power plant SCR boiler flue gas denitrification device of ammonia controlling valves often block in the winter, and need stopping the device to carry out manual cleaning, that seriously affecting the normal operation of the SCR system and NOx emissions standards. Through the mothed of analyzing of the physical scale components of liquid ammonia quality, environmental temperature, equipment, material, jam, we had found the causes of the problem. Ammonia injection valves plug is mainly made of carbon steel rusting and ammonia supplying of inner tube in oily volatile mixed cause. According to the actual situation of the equipment in the power plant, the operation mode of liquid ammonia evaporator was adjusted, the denitrification ammonia suppling pipeline was purged, the structure of ammonia injection regulating valve was reformed, and the stainless steel-pipeline was replaced. The retrofitting reason of ammonia injection regulating valves and their structure are introduced in detail, which is the key to solve the problem.
VL  - 7
IS  - 5
ER  -

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Author Information

Jiang Pengwei

Department of Chemistry, Jianbi Power Plant of Chinese National Energy Investment Refco Group Ltd (CHN ENERRY), Zhenjiang, China
Guo Yueyei

Department of Chemistry, Jianbi Power Plant of Chinese National Energy Investment Refco Group Ltd (CHN ENERRY), Zhenjiang, China
Ni Ye

Department of Chemistry, Jianbi Power Plant of Chinese National Energy Investment Refco Group Ltd (CHN ENERRY), Zhenjiang, China

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Plain Text BibTeX RIS

APA Style

Jiang Pengwei, Guo Yueyei, Ni Ye. (2018). Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage. American Journal of Electrical Power and Energy Systems, 7(5), 56-61. https://doi.org/10.11648/j.epes.20180705.11

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ACS Style

Jiang Pengwei; Guo Yueyei; Ni Ye. Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage. Am. J. Electr. Power Energy Syst. 2018, 7(5), 56-61. doi: 10.11648/j.epes.20180705.11

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AMA Style

Jiang Pengwei, Guo Yueyei, Ni Ye. Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage. Am J Electr Power Energy Syst. 2018;7(5):56-61. doi: 10.11648/j.epes.20180705.11

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@article{10.11648/j.epes.20180705.11,
  author = {Jiang Pengwei and Guo Yueyei and Ni Ye},
  title = {Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {7},
  number = {5},
  pages = {56-61},
  doi = {10.11648/j.epes.20180705.11},
  url = {https://doi.org/10.11648/j.epes.20180705.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20180705.11},
  abstract = {This paper introduces the technological process and operation mode of denitrification and ammonia supply in coal-fired power plants. The Selective Catalytic Reduction (SCR) flue gas denitrification technology of coal-fired power plant is a great significant to environmental protection, which denitrification efficiency is up to 90%. A coal-fired power plant SCR boiler flue gas denitrification device of ammonia controlling valves often block in the winter, and need stopping the device to carry out manual cleaning, that seriously affecting the normal operation of the SCR system and NOx emissions standards. Through the mothed of analyzing of the physical scale components of liquid ammonia quality, environmental temperature, equipment, material, jam, we had found the causes of the problem. Ammonia injection valves plug is mainly made of carbon steel rusting and ammonia supplying of inner tube in oily volatile mixed cause. According to the actual situation of the equipment in the power plant, the operation mode of liquid ammonia evaporator was adjusted, the denitrification ammonia suppling pipeline was purged, the structure of ammonia injection regulating valve was reformed, and the stainless steel-pipeline was replaced. The retrofitting reason of ammonia injection regulating valves and their structure are introduced in detail, which is the key to solve the problem.},
 year = {2018}
}

Copy | Download

TY  - JOUR
T1  - Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage
AU  - Jiang Pengwei
AU  - Guo Yueyei
AU  - Ni Ye
Y1  - 2018/11/15
PY  - 2018
N1  - https://doi.org/10.11648/j.epes.20180705.11
DO  - 10.11648/j.epes.20180705.11
T2  - American Journal of Electrical Power and Energy Systems
JF  - American Journal of Electrical Power and Energy Systems
JO  - American Journal of Electrical Power and Energy Systems
SP  - 56
EP  - 61
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20180705.11
AB  - This paper introduces the technological process and operation mode of denitrification and ammonia supply in coal-fired power plants. The Selective Catalytic Reduction (SCR) flue gas denitrification technology of coal-fired power plant is a great significant to environmental protection, which denitrification efficiency is up to 90%. A coal-fired power plant SCR boiler flue gas denitrification device of ammonia controlling valves often block in the winter, and need stopping the device to carry out manual cleaning, that seriously affecting the normal operation of the SCR system and NOx emissions standards. Through the mothed of analyzing of the physical scale components of liquid ammonia quality, environmental temperature, equipment, material, jam, we had found the causes of the problem. Ammonia injection valves plug is mainly made of carbon steel rusting and ammonia supplying of inner tube in oily volatile mixed cause. According to the actual situation of the equipment in the power plant, the operation mode of liquid ammonia evaporator was adjusted, the denitrification ammonia suppling pipeline was purged, the structure of ammonia injection regulating valve was reformed, and the stainless steel-pipeline was replaced. The retrofitting reason of ammonia injection regulating valves and their structure are introduced in detail, which is the key to solve the problem.
VL  - 7
IS  - 5
ER  -

Copy | Download