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Effects of Temperature and Oxygen-to-Coal Ratio on NO/HCN Transformation During Coal Preheating(PDF)

《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

Issue:
2020 01
Page:
37-41
Research Field:
Publishing date:

Info

Title:
Effects of Temperature and Oxygen-to-Coal Ratio on NO/HCN Transformation During Coal Preheating
Author(s):
Wang Shuai1Gong Yanhao1Zhang Hao1Zhao Lipeng2Li Yong2 Niu Yanqing1Wang Denghui1Hui Shi’en1
1. School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China; 2. Taishan Group Co.,Ltd,Tai’an 271000,China
Keywords:
temperatureoxygen-to-coal ratioNOHCN
PACS:
TK11
DOI:
10.11715/rskxjs.R201903028
Abstract:
To explore the de-NOx mechanism of pulverized coal preheating and combustion coupling technology, the effects of temperature and oxygen-to-coal ratio(OCR)on the NO/HCN transformation during pulverized coal preheating was investigated. It was found that when the OCR was 0 or 0.1,the NO content decreased while the HCN content increased with the increase of temperature. When the OCR further increased to 0.3 and above,the NO content increased while the HCN content increased first and then decreased with increasing temperature. The global reaction was used to analyze the experimental result. Conclusions can be made that the HCN-reduced NO was dominant in the high-temperature low-oxygen conditions,while HCN-produced NO became dominant in high-oxygen conditions.

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Last Update: 2020-01-17