华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (3): 78-82.doi: 10.3969/j.issn.1000-565X.2011.03.016

• 动力与电气工程 • 上一篇    下一篇

基于热平衡原理的SNCR射流混合模化试验

卢志民   

  1. 华南理工大学 电力学院∥ 广东省绿色能源技术重点实验室,广东 广州 510640
  • 收稿日期:2010-04-21 修回日期:2010-08-31 出版日期:2011-03-25 发布日期:2011-02-01
  • 通信作者: 卢志民(1979-),男,博士,讲师,主要从事低污染燃烧技术及烟气污染控制研究 E-mail:zhmlu@scut.edu.cn
  • 作者简介:卢志民(1979-),男,博士,讲师,主要从事低污染燃烧技术及烟气污染控制研究
  • 基金资助:

    国家“973”计划项目(2011CB201500);能源清洁利用国家重点实验室(浙江大学)开放课题

Modeling Experiment of SNCR Injection Based on Heat Balance Theory

LU Zhi-Min   

  1. South China university of technology, guangdong province electricity institute ∥ green energy technology key laboratory, guangdong guangzhou 510640
  • Received:2010-04-21 Revised:2010-08-31 Online:2011-03-25 Published:2011-02-01
  • Contact: 卢志民(1979-),男,博士,讲师,主要从事低污染燃烧技术及烟气污染控制研究 E-mail:zhmlu@scut.edu.cn
  • About author:卢志民(1979-),男,博士,讲师,主要从事低污染燃烧技术及烟气污染控制研究
  • Supported by:

    国家“973”计划项目(2011CB201500);能源清洁利用国家重点实验室(浙江大学)开放课题

摘要: 介绍了一种应用热平衡原理对选择性非催化还原(SNCR)脱硝技术中的射流混合情况进行模化试验的方法.在一台1∶10的410t/h锅炉模化试验台上,进行了喷射总流量、速度、喷嘴数目和布置方式等对混合效果影响规律的研究,并通过引入理想脱硝率的概念,定量比较出不同的混合方案所能达到的理想脱硝效果.试验结果表明,理想脱硝率随着喷射总流量的提高从47%升高到58%,提高喷射速度也可以将理想脱硝率提高8%,而采取不同喷射策略时获得的脱硝率在44%~52%之间,同时氨氮比的提高也可以显著提高理想脱硝率.

关键词: 选择非催化还原, 热平衡, 氮氧化物, 混合, 模化

Abstract:

Proposed in this paper is a heat balance-based experiment method for the modeling of SNCR(Selective Non-Catalytic Reduction) injection.The experiments are carried out at a 1∶10 410t/h boiler modeling platform,by which the influences of total flowrate,flow velocity,injector number and injection strategy on the mixing effect are investigated.Moreover,the concept of ideal NOx reduction ratio is introduced to quantify the NOx reduction with different injection strategies.The results indicate that the ideal NOx reduction ratio increases from 47% to 58% with the total flowrate and increases by 8% with the flow velocity,and that it varies from 44% to 52% at different injection strategies.Moreover,it is found that ammonia/NO ratio also has a significantly positive effect on the ideal NOx reduction ratio.

Key words: Selective non-catalytic reduction, Heat balance, Nitrogen oxides, Mixing, Modeling