Design and optimization of ultra-low NOx emission for S-CO2 pulverized coal-fired boiler

被引：0

作者：

Chen M. ^{[1
]}

Zhong W. ^{[1
]}

Chen X. ^{[1
]}

机构：

[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 01期

关键词：

Denitrification; Numerical simulation; Orthogonal experiment; S-CO[!sub]2[!/sub] coal-fired boiler; Selective catalytic reduction;

D O I：

10.3969/j.issn.1001-0505.2022.01.003

中图分类号：

学科分类号：

摘要：

To achieve the ultra-low NOx emission of supercritical carbon dioxide (S-CO2) Brayton circulating coal-fired power generation, the thermal system analysis and combustion numerical test of a 1 000 MW S-CO2 circulating pulverized coal boiler were carried out to obtain the temperature distribution in the tail flue and the characteristics of flue gas at the furnace outlet. Based on this, a design scheme for ultra-low NOx emission was constructed. The influence rule of structure parameters on the denitrification performance was studied by combining numerical simulation with orthogonal experiment, and the internal structure of selective catalytic reduction (SCR) denitrification system was optimized. The results show that the outlet temperature of S-CO2 pulverized coal boiler is higher than that of the traditional steam boiler. The air preheater of S-CO2 pulverized coal boiler needs to be divided into two stages and the SCR denitrification reactor should be placed between the two stages. The heat absorption capacity of the air preheater in front of SCR denitrification reactor is 215.83 MW. The upstream structure of the catalyst has the greatest influence on the inlet speed deviation of the catalytic layer. The relative standard deviation coefficient of the first catalyst inlet of the optimized denitrification system is 10.19%. © 2022, Editorial Department of Journal of Southeast University. All right reserved.

引用

页码：16 / 24

页数：8

共 23 条

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