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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 25, 2006
Accepted November 30, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Industrial test on coal re-burning at a 600MW utility boiler and NOx reduction

Penghua Qiu^† Shaohua Wu Shaozeng Sun Hui Liu Longbin Yang Guozhong Wang

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

qiuph@hit.edu.cn

Korean Journal of Chemical Engineering, July 2007, 24(4), 683-687(5), 10.1007/s11814-007-0026-6

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Abstract

This research conducts a series of industrial tests on coal reburning of a 600 MW pulverized coal boiler firing lignite, which is one part of a coal reburning demonstration project. When running steadily under 600MW load, the boiler has an average NOx emission of 274 mg/m3 (O2 content in flue gas is converted to 6%), the NOx emission is reduced by 65.36%. In the meanwhile, loss of ignition (LOI) under coal reburning rarely increases. Three operation conditions - traditional air feeding, air staging and coal reburning - are realized, respectively, during the industrial tests, and the results indicate that coal reburning has the lowest NOx emission, while the traditional air feeding has the highest NOx emission. Under the test conditions, the higher the proportion of the reburning coal, the higher the NOx control can reach.

Keywords

Coal Reburning Fuel Staging NOx Industrial Test Lignite

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