帶煙氣循環的W型輻射管流動傳熱及NO<sub><i>x</i></sub>排放特性

馮俊小; 姜敏; 周聞華; 吳啟明; 向順華

doi:10.13374/j.issn1001-053x.2014.11.019

帶煙氣循環的W型輻射管流動傳熱及NO_x排放特性

doi: 10.13374/j.issn1001-053x.2014.11.019

馮俊小^1,2,
姜敏^1, ,,
周聞華¹,
吳啟明³,
向順華⁴

1. 北京科技大學機械工程學院, 北京 100083;
2. 北京科技大學高校節能與環保工程研究中心, 北京 100083;
3. 北京京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: 146
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- PDF下載量: 14
- 被引次數: 0
出版歷程
- 收稿日期: 2014-06-10
- 網絡出版日期: 2021-07-19

Flow heat transfer and NO_x emission characteristic of W-shaped radiant tubes with flue gas circulation

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型輻射管溫度均勻性差和NO_x排放過高的問題，提出了一種新型帶煙氣循環的W型輻射管，建立了該輻射管的數學模型，并運用數值計算的方法進行了模擬研究.在驗證模型可靠的基礎上，對帶煙氣循環的W型輻射管和常規W型輻射管的流場、溫度場和NO_x排放進行了比較.結果表明：帶煙氣循環的W型輻射管氣體平均流速是常規W型輻射管氣體流速的3倍，有57.6%的煙氣參與再循環；帶煙氣循環的W型輻射管中氣體燃燒最高溫度為2260 K，比W型輻射管低192 K；帶煙氣循環的W型輻射管壁面溫差為166 K，比常規W型輻射管的壁面溫差小76 K；帶煙氣循環的W型輻射管的NO_x排放量9.9×10^-5，而W型輻射管的NO_x排放達到7.98×10^-4，高出將近7倍.
- 輻射管 /
- 流動傳熱 /
- 煙氣 /
- 溫度 /
- 氮氧化物 /
- 氣體排放 /
- 數值模擬
Abstract: In order to solve the large wall temperature difference and high NO_x emission of W-shaped radiant tubes, this article introduces a kind of W-shaped radiant tube with flue gas circulation. A mathematical model of the radiant tube is established and the radiant tube is studied by the method of numerical calculation. On the basis of the model's reliability, the velocity field, temperature field and NO_x emission are compared between the radiant tube and a conventional W-shaped radiant tube. The average gas velocity of the new radiant tube is three times that of the conventional radiant tube, and 57.6% flue gas is involved in recombustion in the new radiant tube. The maximum combustion temperature of the new radiant tube is 2260 K, which is 192 K lower than that of the conventional radiant tube. The wall temperature difference of the new radiant tube is 166 K,which is 76 K lower than that of the conventional radiant tube. The NO_x emission of the new radiant tube is 9.9×10^-5, but the NO_x emission of the conventional radiant tube is 7.98×10^-4, nearly seven times higher.
- radiant tubes /
- heat transfer /
- flue gas /
- temperature /
- nitrogen oxides /
- gas emission /
- numerical simulation