Preheated combustion characteristics and fuel-nitrogen conversion paths for bituminous coal and anthracite in wide-range preheating temperature

被引：20

作者：

Zhang, Xiaoyu ^{[1
,2
]}

Zhu, Shujun ^{[1
]}

Zhu, Jianguo ^{[1
,3
]}

Hui, Jicheng ^{[1
,4
]}

Liu, Yuhua ^{[1
,3
]}

Zhang, Jiahang ^{[1
,3
]}

Lin, Jiangong ^{[1
,5
]}

Lyu, Qinggang ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] North China Electic Power Univ, Beijing 102206, Peoples R China

[5] Shanxi Datong Univ, Datong 037009, Peoples R China

来源：

JOURNAL OF THE ENERGY INSTITUTE | 2023年 / 108卷

基金：

中国国家自然科学基金;

关键词：

Bituminous coal; Anthracite; Preheating temperature; Nitrogen conversion; Preheated combustion; PULVERIZED CHAR; NO EMISSIONS; MILD COMBUSTION; FLUIDIZED-BED; GASIFICATION; RELEASE; TAR;

D O I：

10.1016/j.joei.2023.101222

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In this study, the characteristics of preheated combustion and fuel-nitrogen (fuel-N) conversion paths in wide-range preheating temperature (700 degrees C-900 degrees C) for bituminous coal and anthracite were revealed during the preheated combustion. The conversion of fuel-N mainly underwent three procedures, including the conversion from fuel-N to char-nitrogen (char-N), tar-nitrogen (tar-N) and gas-nitrogen (gas-N) in the PCFB, the reduction from preheated fuel-N to N2 in the reduction region of combustor and the release of NOx from the char-N in the oxidation region of combustor. During the preheating, the highest conversion ratio from fuel-N to tar-N was 9.94% at the preheating temperature of 700 degrees C for bituminous coal. However, the conversion ratio from fuel-N to tar-N was below 2% for anthracite from 700 degrees C to 900 degrees C. Most of fuel-N was transformed into char-N and N2 during the preheating. Although higher preheating temperature promoted the conversion of fuel-N during the preheating, the reduction of char-N was inhibited due to the lower temperature of reduction region in the combustor for anthracite. The lowest concentration of NOx emission was 226.01 mg/m3(@ 6% O2) at the pre-heating temperature of 850 degrees C for anthracite.

引用

页数：11

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