Experimental Study on Denitration Transformation of CFB Boiler Burning Fujian Anthracite

Wenting Zhou, Hongzhou He () and Huanghuang Zhuang
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Wenting Zhou: Key Laboratory of Energy Cleaning Utilization and Development of Fujian Province, Jimei University, Xiamen 361021, China
Hongzhou He: Key Laboratory of Energy Cleaning Utilization and Development of Fujian Province, Jimei University, Xiamen 361021, China
Huanghuang Zhuang: Key Laboratory of Energy Cleaning Utilization and Development of Fujian Province, Jimei University, Xiamen 361021, China

Energies, 2023, vol. 16, issue 6, 1-12

Abstract: Two 75 t/h medium-temperature separated circulating fluidized bed boilers burning Fujian anthracite were upgraded with low NOx combustion (LNC). By reducing the effective cross-sectional area of the air distributor (from 13.43 m 2 to 11.38 m 2 ), improving the secondary air rate (from 40% to 45%), adjusting the secondary air supply method (adding a layer of upper secondary air, raising the height of the lower secondary air nozzle (0.4 m), and increasing the secondary air speed (from 48 m/s to 54 m/s), the reform of low nitrogen combustion was carried out. The transformation achieved remarkable results, i.e., the original NOx emission concentration can be controlled between 140–160 mg/m 3 after the transformation, and the lowest value is below 120 mg/m 3 .

Keywords: CFB boiler; denitration transformation; low NOx combustion; Fujian anthracite (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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