Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation

Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation ZHAO Dazhou; WANG Chuanqi; SI Fengqi; XU Zhigao

English Version Reader LoginJournal Login

您当前的位置：

首页 >

文章列表页 >

Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation

更新时间：2025-09-28

- Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation
- Thermal Power Generation Vol. 44, Issue 12, Pages: 93-97(2015)
- 作者机构：
  
  1. 东南大学能源热转换及其过程测控教育部重点实验室
  2. 大唐马鞍山当涂发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2015
- 稿件说明：
移动端阅览
Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation ZHAO Dazhou, WANG Chuanqi, SI Fengqi, et al. Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation[J]. Thermal power generation, 2015, 44(12): 93-97.
DOI：

Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation ZHAO Dazhou, WANG Chuanqi, SI Fengqi, et al. Optimization of ammonia injection in a SCR denitration system with multiple variable cross sections:numerical simulation[J]. Thermal power generation, 2015, 44(12): 93-97. DOI：

摘要

以某660 MW燃煤机组选择性催化还原(SCR)烟气脱硝系统为研究对象

采用Gambit软件建立了三维数值模型

以模拟分析反应器内流场分布的特点

并对比了分区喷氨和线性喷氨2种方式对首层催化剂入口氨气分布均匀性的影响。结果表明:因反应器存在2个变截面烟道

从而使得喷氨格栅处的烟气流场分布极不均匀

烟气速度相对偏差系数为27.5%;采用线性喷氨方式时

首层催化剂入口氨气分布相对偏差系数高达25.3%;对于分区喷氨方式

采用10区喷氨方式时首层催化剂入口氨气分布相对偏差系数为8.9%

30分区喷氨方式可使氨气分布相对偏差系数降低至5.6%

分区喷氨的效果显著优于线性喷氨。

Abstract

Taking the SCR de-NOxsystem in a 660 MW coal-fired unit as the research object

a three-dimensional numerical model was established by using the Gambit software.The characteristics of flow field distribution in the reactor were simulated.Moreover

the effects of ammonia injection strategies on uniformity of the NH3 distribution at entrance of the first catalyst layer were investigated.The results show that

due to the existence of two flue ducts with variable cross sections in the reactor

the flow field distribution at the ammonia injection grid(AGI)is extremely uneven

the relative deviation coefficient of flue gas velocity is 27.5%.When the linear ammonia injection strategy is adopted

the relative deviation coefficient of NH3 at entrance of the first catalyst layer is 25.3%.The relative deviation coefficient of NH3 at entrance of the first catalyst layer is 8.9% when the 10-area ammonia injection strategy is employed and that becomes5.6% when the 30-area ammonia injection strategy is adopted.The ammonia injection effect of partition ammonia injection strategy is obviously better than that of the linear ammonia injection strategy.

关键词

Keywords

references

Views

133

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Heat-mass transfer and chemical reaction characteristics during carbon dioxide absorption by amine solution in spray scrubber

NUMERICAL ANALYSIS OF AERODYNAMIC FIELD IN WET TYPE NATURAL-DRAFT COOLING TOWER

NUMERICAL ANALYSIS OF TURBULENT FLOW HEAT TRANSFER ON THE SHELL-SIDE OF SPIRALLY TWISTED FLAT-TUBE HEAT EXCHANGER

APPLICATION OF NUMERICAL SIMULATION IN OPTIMIZED DESIGN OF DEMISTOR FOR WET DESULFURATION

STUDY ON NUMERICAL SIMULATION OF FIRST-STAGE FIRING CHAMBER STRUCTURE IN OIL-SAVING IGNITION BURNER

Related Author

ZHU Hongqing

GUO Feng

QU Jiangyuan

WANG Kai

SUN Feng-zhong

WANG Wei

ZHANG Xing-xiang

WANG Hai-feng

Related Institution

National Nuclear Power Planning and Design Institute Co., Ltd

Shandong University

Nanjing University of Technology

North China Electric Power University

China Institute of Metrology

AI问答

⁰