一氧化碳鍋爐熱流場數值模擬研究：（二）增厚防火泥對於燃燒流場影響之探討

Numerical Study of the Reacting Flow in a CO Boiler: Influence of Insulation Thickening

葉俊郎(Chun-Lang Yeh)

《國立虎尾科技大學學報》 30卷1期 (2011/03) Pp. 1-12

https://doi.org/10.6425/JNHUST.201103.0001

摘要

一氧化碳鍋爐的操作良窳對於石化、鋼鐵、機械等相關產業之製程有非常重大的影響，作者在先前的研究中曾針對增厚防火泥對於一氧化碳鍋爐熱傳流場之影響進行深入研究，在本文中則繼續探討增厚防火泥對於一氧化碳鍋爐燃燒流場之影響，並與先前之純熱傳流場相比較，由研究結果發現，無論是純熱傳流場或是燃燒流場，增厚防火泥對於壁面溫度與剪應變均有重大影響，當防火泥增厚時，脫硝段之逆壓力梯度變小，核心流之對流運動變強，這將使原來集中於脫硝段與煙道氣冷卻段上壁面的高溫區溫度降低，剪應變變小；相較於脫硝段與煙道氣冷卻段，屬於上游區的氧化段較不受到防火泥增厚的影響。

關鍵字

一氧化碳鍋爐 ； 燃燒流場 ； 增厚防火泥

並列摘要

Performance of a CO boiler has a detrimental influence on the operation and production of related industries. In a previous study, the author has presented a numerical study of the influence of insulation thickening on the heat transfer and fluid flow in a CO boiler. In the present paper, the influence of insulation thickening on the reacting flow in a CO boiler is discussed. It is found that insulation thickening can alleviate the adverse pressure gradient in the DeNOx section and therefore strengthen the convective motion in the core region. This will decrease the higher temperature range and the shear strain rate in the upper portions of the DeNOx and flue gas cooling sections. On the other hand, the oxidation section which is located in the upstream region of a CO boiler is less influenced by the insulation thickening effect.

並列關鍵字

CO Boiler ； Combustion ； Insulation Thickening

參考文獻

葉俊郎(2010)。一氧化碳鍋爐熱流場數值模擬研究：（一）增厚防火泥對於熱傳流場影響之探討。國立虎尾科技大學學報。二十九(四)，11-26。

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