W型輻射管低NO<sub><i>x</i></sub>排放的數值研究

馮俊小; 姜敏; 曹亞平; 陳艷梅; 吳啟明; 向順華

doi:10.13374/j.issn1001-053x.2014.08.016

W型輻射管低NO_x排放的數值研究

doi: 10.13374/j.issn1001-053x.2014.08.016

1. 北京科技大學機械工程學院, 北京 100083;
2. 北京科技大學北京高校節能與環保工程研究中心, 北京 100083;
3. 京誠鳳凰工業爐工程技術有限公司, 北京 100176;
4. 寶鋼研究院, 上海 201900

基金項目:

“十二五”國家支撐計劃資助項目（2011BAE13B09）

詳細信息

通訊作者:
姜敏,E-mail:jiangmin19901224@163.com

中圖分類號: TF055
計量
- 文章訪問數: 119
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- 被引次數: 0
出版歷程
- 收稿日期: 2013-09-23
- 網絡出版日期: 2021-07-19

Numerical investigation on the low NO_x emission of W-shaped radiant tubes

1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Engineering Research Center for Energy Saving and Environmental Protection, University of Science and Technology Beijing, Beijing 100083, China;
3. CERI Phoenix Industrial Furnace Corporation, Beijing 100176, China;
4. Baosteel Research Institute, Shanghai 201900, China

摘要

摘要: 為解決W型輻射管NO_x排放過高的狀況，運用數值計算的方法，研究了具有兩級空氣分級的W型輻射管NO_x排放情況，經驗證，模型可靠.探討了不同稀釋劑、分級稀釋以及高溫稀釋情況下對NO_x排放的影響規律.分析以N₂和CO₂作為稀釋劑的區別，發現以CO₂作為稀釋劑更能抑制NO_x生成，在保證火焰穩定的情況下適當增加稀釋體積分數可以使出口NO_x降低到4×10^-5以下.通過采用分級稀釋，發現二級風與一級風相比，更能減少NO_x排放.通過高溫預熱空氣添加稀釋劑的模擬，發現即使空氣預熱溫度達到1000℃以上，也可以通過增加稀釋體積分數將出口NO_x控制排放在1×10^-4以下.
- 氣體燃燒 /
- 輻射管 /
- 氮氧化物控制 /
- 數值分析
Abstract: To cope with the high NO_xemission problem of W-shaped radiant tubes,the influence of diluents in two-stage air combustion on the NO_xemission of W-shaped radiant tubes was investigated numerically. Calculation results coincide well with data obtained from experiments. The analysis was carried out for 3 cases:different diluents,stepwise dilution,and diluents together with high temperature air. Compared to diluting with N₂,diluting with CO₂ produces less NO_x. It can reduce the NO_xemission blow 4 ×10^-5 by increasing the diluted volume fraction under the condition of ensuring flame stabilization. By stepwise dilution,the secondary air contributes more to NO_xreduction than the primary air. The NO_xemission can be controlled under 1 × 10^-4 by increasing the diluted volume fraction,even if the temperature of preheated air reaches above 1000℃.
- gas combustion /
- radiant tubes /
- nitrogen oxide control /
- numerical analysis