Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage
American Journal of Electrical Power and Energy Systems
Volume 7, Issue 5, September 2018, Pages: 56-61
Received: Jul. 24, 2018;
Accepted: Aug. 15, 2018;
Published: Nov. 15, 2018
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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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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.
Ammonia Injection Valve Structure, Ammonia Evaporator, Blocking, Scale Sample Analysis, Improvement
To cite this article
Reason Analysis and Countermeasures of Coal-Fired Power Plant Denitrification Ammonia Injection Valve Blockage, American Journal of Electrical Power and Energy Systems.
Vol. 7, No. 5,
2018, pp. 56-61.
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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