分區分級雙P型輻射管噴口結構位置特性

徐錢; 馮俊小; 周聞華; 陳艷梅

doi:10.13374/j.issn2095-9389.2017.05.014

分區分級雙P型輻射管噴口結構位置特性

doi: 10.13374/j.issn2095-9389.2017.05.014

北京科技大學能源與環境學院, 北京 100083

基金項目:

“十三五”國家重點科技支撐計劃資助項目（2016YFB0601300）

詳細信息

中圖分類號: TF062
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- 文章訪問數: 630
- HTML全文瀏覽量: 248
- PDF下載量: 9
- 被引次數: 0
出版歷程
- 收稿日期: 2016-07-04

Location characteristics of the nozzle structure in the double P-type radiant tube

School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 為了對分區分級雙P型燃氣輻射管噴口結構、位置進行優化，提高燃燒效率.首先對分區分級雙P型燃氣輻射管進行了實驗和數值研究，結果發現，除NO_x體積分數的誤差為11.6%外，其他參數的偏差都在1%以內，證明該模型具有可靠性.在此基礎上，通過研究主管和支管的噴口位置及噴口結構等參數，進行了氣體溫度和壁面溫度的研究分析.結果顯示：隨著主管噴口位置向外移動，分區分級燃氣輻射管表面溫度的最高值逐漸減小，壁面溫度的最低值逐漸增大.支管噴口位于三通管與支管交線處時，可以減少高溫氣體對輻射管管壁的沖擊作用，提高支管徑向的溫度均勻性，延長輻射管使用壽命；主管噴口的形式為完全預混式噴口時，壁面溫差最小；支管噴口的形式為不對稱式時，分區分級燃氣輻射管壁面溫差最小，燃燒熱效率最高.
- 輻射管 /
- 噴嘴 /
- 空燃比 /
- 結構 /
- 氮氧化物控制
Abstract: To optimize combustion efficiency, the structural characteristics of the zoned and staged double P-type gas-fired radiant tube were improved. The corresponding experimental and numerical studies were performed on the new radiant tube and the results show that deviations in the monitoring parameters are less than 1%, except for a NO_x concentration of 11.6%, which proves the reliability of the model. On this basis, the gas and wall temperatures were compared by changing the nozzle position and structure parameters of main and branch pipes. The results show that as the nozzle position moves outward, the highest value of the surface temperature of the radiant tube gradually decreases and the minimum value of the wall temperature gradually increases. When the nozzle of the branch pipe locates at the intersection of the tee and branch pipes, it helps to reduce the impact of the high temperature gas on the pipe wall, improve the uniformity of the branch radial temperature, and prolong the service life of the radiation tube. When the nozzle is fully premixed, the temperature difference is minimized. When the pipe nozzle is asymmetric, the difference in the wall temperatures is minimized and the thermal combustion efficiency is the highest.
- radiant tube /
- nozzle /
- air-fuel ratio /
- structure /
- nitrogen oxide control

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參考文獻(14)

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