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  本文選題：變換爐 + 流場均布��； 參考：《合肥工業(yè)大學》2015年碩士論文

【摘要】：本文根據(jù)水氣變換催化反應變換爐的氣相初始進料的特點,采用計算流體力學方法對變換爐內作流場可視化模擬。通過建立變換爐三維模型,分別討論了雙列葉片式氣體分布器和雙切環(huán)流式氣體分布器對變換爐內流場的均布作用,模擬結果表明,兩種分布器對氣相初始分布有明顯改善和優(yōu)化,總體表現(xiàn)在在進氣分布更加均勻、壓降更低、成本更低,有利于變換爐傳質效率的提高。其中雙列葉片式氣體分布器對上爐膛的流場均布改善明顯,雙切環(huán)流式氣體分布器對下爐膛的流場均布改善效果明顯�；谝陨蟽煞N分布器及其特點,分別優(yōu)化雙入口進氣比及分布器側壁入口安裝高度的數(shù)據(jù),結果表明：雙列葉片式氣體分布器當安裝高度為3.3m,進氣分流比為7：5,壓力降為71Pa,出口處最大流速為9.91m/s,流場均布最佳；雙切環(huán)流式氣體分布器側壁進口高度為4.3m,雙入口分流比為9：3時,其壓力降為79Pa,出口最大流速為10.66m/s,均布效果最佳。針對兩種分布器的優(yōu)缺點分別作了改進設計。在水氣變換反應爐中,如使用雙列葉片式氣體分布器,可以選擇在分布器下封蓋開孔且加導流板的改進設計安裝,可進一步改善下爐膛流場均布；如選擇雙切葉片式氣體分布器,可以選擇在頂部進氣口處增設導流板,或者在分布器下方合適位置安裝分布環(huán),可以提高整個爐膛的流場均布。在上述的模型中添加氣固相能量反應模型、添加UDS多孔介質模型做數(shù)值模擬,對以上的設計加以論證。模擬結果與Wei-Hsin Chen實驗值基本相符。同時將該模型應用于某化工廠變化爐中,所得CO轉化率接近且高于生產(chǎn)值。本文的研究為數(shù)值模擬雙入口變換爐的流場均布提供建模參數(shù),同時為氣體分布器的設計改進提供了設計思路以。
[Abstract]:In this paper , based on the characteristics of the gas phase initial feeding of the water - gas shift catalytic reaction transformation furnace , the flow field visualization in the transformation furnace is simulated by using the computational fluid mechanics method . The simulation results show that the two - row vane type gas distributor has a better effect on the gas phase initial distribution , and the simulation results show that the two kinds of distributor have obvious improvement effect on the flow field of the upper furnace chamber . The results show that the double - row vane type gas distributor has better effect on the flow field of the upper furnace chamber .
The inlet height of the side wall of the double - cut circulation type gas distributor is 4.3m , the pressure drop is 79Pa and the outlet maximum flow rate is 10.66m / s when the double inlet flow - flow ratio is 9 : 3 . The advantages and disadvantages of the two distributors are improved respectively . In the water - gas shift reaction furnace , if a double - row blade type gas distributor is used , the opening of the cover opening in the distributor can be selected and the improved design installation of the guide plate can be selected , so that the flow field uniform distribution of the lower hearth can be further improved ;
In the model , the gas - solid phase energy reaction model is added , and the distribution ring can be installed at the proper position below the distributor , so that the flow field of the whole furnace can be improved . The model is applied to a chemical plant change furnace , and the obtained CO conversion rate is close to and higher than the production value . The research of the present invention provides a modeling parameter for the flow field uniform distribution of the double inlet conversion furnace , and provides a design idea for the design improvement of the gas distributor .

【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ054

【參考文獻】

相關期刊論文 前1條

1 馬艷梅;王松江;張振千;李國智;;催化裂化氣體分布器的CFD模擬及優(yōu)化[J];煉油技術與工程;2014年07期

相關碩士學位論文 前2條

1 龍回龍;水氣變換反應催化劑的CFD模擬[D];大連理工大學;2012年

2 閆金鳳;CFD在甲醇合成過程中的應用研究[D];大連理工大學;2013年

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本文編號：1735870