Characteristics of NO<sub><italic style="font-style: italic">x</italic></sub> Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit

Jiang FAN; Shuangping ZHANG; Yu MENG; Weixiong CHEN; Junjie YAN

doi:10.12096/j.2096-4528.pgt.20038

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Characteristics of NO_x Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit

Factory Green Island and Digital Twin Technology | 更新时间：2025-07-04

- Characteristics of NO_x Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit
- Power Generation Technology Vol. 41, Issue 5, Pages: 527-535(2020)
- 作者机构：
  
  1.西安交通大学能源与动力工程学院, 陕西省西安市 710049
  2.大唐西北电力试验研究院, 陕西省西安市 710021
- 作者简介：
- 基金信息：
  
  National Key Basic Research and Development Program of China(2015CB251504)
- DOI：10.12096/j.2096-4528.pgt.20038
  CLC： TK16
- Received：09 June 2020，
  
  Published：31 October 2020
- 稿件说明：
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Jiang FAN, Shuangping ZHANG, Yu MENG, et al. Characteristics of NO_x Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit[J]. Power Generation Technology, 2020, 41(5): 527-535.
DOI：

Jiang FAN, Shuangping ZHANG, Yu MENG, et al. Characteristics of NO_x Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit[J]. Power Generation Technology, 2020, 41(5): 527-535. DOI： 10.12096/j.2096-4528.pgt.20038.

摘要

燃煤机组为完成电网负荷调峰任务，锅炉负荷长期频繁波动，对氮氧化物的生成及脱除效果有显著影响。以某660 MW燃煤机组瞬态过程氮氧化物的生成及脱除特性为研究目标，建立了机组瞬态过程氮氧化物生成预测模型，开展了变负荷过程中氮氧化物生成预测研究。针对燃煤机组变负荷过程燃烧器切换的特点，发现新增燃烧器的负荷点越高时，越能有效避免氮氧化物的生成值增大。另外，分析了选择性催化还原（selective catalytic reduction，SCR）动态特性，分别研究了SCR入口氮氧化物浓度、喷氨浓度、烟气流速和反应温度等阶跃变化对氮氧化物脱除的动态特性影响，为后续瞬态过程喷氨优化控制逻辑提供参考。

Abstract

In order to complete the peak load regulating of power system

coal-

fired power units have long-term frequent load fluctuations

which have a significant impact on the formation and removal of nitrogen oxides. In this paper

with the goal of studying the characteristics of nitrogen oxide generation and removal in the transient process of a 660 MW coal-fired unit

a prediction model of nitrogen oxides generation in the transient process was established

and the nitrogen oxides generation prediction study in the process of variable load was carried out. According to the characteristics of the burner switching in the variable load process of the coal-fired unit

it was found that the higher load point of the newly added burner

the more effectively it can avoid the increase of the generation value of nitrogen oxides. In addition

the dynamic characteristics of selective catalytic reduction (SCR) were analyzed

and the effects of the step changes such as nitrogen oxide concentration

injection concentration

flue gas flow rate and reaction temperature on the dynamic characteristics of nitrogen oxides removal were studied respectively

which provides a reference for the optimization control logic of NH

injection in the subsequent transient process.

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Characteristics of NOx Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit

DOI：10.12096/j.2096-4528.pgt.20038

摘要

Abstract

关键词

Keywords

references

Characteristics of NO_x Formation and Removal in the Transient Process of a 660 MW Coal-fired Power Unit