Numerical simulation and optimization of NCR denitration system for travelling grate boilers

ZHANG Liping; LI Kaituo; WANG Weifeng; ZHU Jing; CHEN Haotian; WANG Xiyang

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Numerical simulation and optimization of NCR denitration system for travelling grate boilers

Thermal Power Generation Vol. 44, Issue 9, Pages: 86-91(2015)

更新时间：2025-09-28

- Numerical simulation and optimization of NCR denitration system for travelling grate boilers
- 作者机构：
  
  1. 华北水利水电大学电力学院
  2. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK229.61
- Published：2015
- 稿件说明：
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ZHANG Liping, LI Kaituo, WANG Weifeng, et al. Numerical simulation and optimization of NCR denitration system for travelling grate boilers[J]. Thermal Power Generation, 2015, 44(9): 86-91.
DOI：

ZHANG Liping, LI Kaituo, WANG Weifeng, et al. Numerical simulation and optimization of NCR denitration system for travelling grate boilers[J]. Thermal Power Generation, 2015, 44(9): 86-91. DOI：

摘要

以某台90t/h链条炉为研究对象

运用Fluent软件对炉内的流动传热、气相燃烧过程进行模拟

得到炉内的速度场和温度场

并由此确定了炉膛中上部为适宜进行选择性非催化还原(SNCR)烟气脱硝的区域

进而结合该链条炉炉膛空间较大的特点

将喷氨口位置选定在前墙5.7m高度处

沿宽度方向均匀布置8个喷氨口。对SNCR烟气脱硝系统进行数值模拟

结果表明:氨水液滴的喷射速度为40m/s

n(NH3)∶n(NO)为1.5

NH3总消耗量为0.002 58kg/s

氨水液滴直径为60μm时

还原剂NH3和NO反应最充分

NO脱除效率最高

为42.3%。

Abstract

Taking a 90t/h travelling grate boiler as the research object

the Fluent software was applied to simulate the flowing heat transfer and gas phase combustion in the furnace.The velocity field and temperature field in the furnace was obtained and the middle-upper part of the furnace was identified as the proper area for selective non-catalytic reduction(SNCR)denitration.Considering the furnace space is adequate

the ammonia injection point was located at the place of 5.7mhigh on the front wall and a total of 8ammonia injection points were regularly arranged along the width of the furnace.On this basis

numerical simulation on the SNCR denitration system was carried out.The results show that

under the condition with the ammonia spraying velocity of 40 m/s

the ammonia droplet diameter of 60μm

the molar ratio of NH3 to NO of 1.5and the total NH3 consumption of 0.002 58kg/s

the reaction between NH3 and NO was the most complete and the NO removal rate reached the highest

42.3%.

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ZHANG Xiangyu

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Related Institution

Xi’an Thermal Power Research Institute Co., Ltd.

Xi'an Thermal Power Research Institute Co.,Ltd.

Henan Branch,Huaneng International Inc.

Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University

School of Mechanical and Electrical Engineering, Nanchang University

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