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頁籤選單縮合
題名 | Study on the Expansion of the Effective treating Zone in a Fluidized Bed Furnace=擴增流體床有效處理帶之研究 |
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作者 | 陳繁雄; 鄭有泉; 林于超; | 書刊名 | 大同學報 |
卷期 | 23 1993.11[民82.11] |
頁次 | 頁256-264 |
分類號 | 472 |
關鍵詞 | 流體床; 處理帶; |
語文 | 英文(English) |
中文摘要 | 流體床技術之應用於熱處理工業為近年來之趨勢,然其在臺灣卻未能如國外之成 長迅速,究其原因主要可歸納如以下兩點原因: 一、氣體消耗量過大,未能符合本地經濟條件。 二、流體床中氣體之不穩定性,在表面處理之應用上,爐底與爐頂之氣氛變化過大,無法獲 得較大的有效處理帶,且由於直接吹入反應之特性,滲碳氣氛之碳勢控制困難。 本研究係針對改善以上之第二項缺點所作之研究,研究採如下之措施: 一、控制廢氣之流失,減少空氣之陷入,期能減低爐內之碳勢梯度。 二、爐頂輸入加富氣體,以減低爐內之碳勢梯度。 三、配合氣體回收係統控制加富氣體,達到控制爐內之碳勢。 |
英文摘要 | It is a trend that the fluidized bed technique has been recently applied in heat treatment industry, however, the application of fluidized bed furnace in Taiwan is not popular as in some foreign countries. It may due to the reasons as follows: firstly, the gas consumption is far beyond the treating cost in domestic market, and secondly, the unstable atmosphere composition between the lower and upper positions of the fluidized bed on account of direct boosting of the fuel gas and air/nitrogen from bottom of the bed, in consequence narrowing the effective treating zone of the bed, and because of the fluctuation of the atmosphere composition, the carbon potential of the carburizing atmosphere is very difficult to control. This project is aimed to improve the stability of the carburizing atmosphere by adopting the following methods: 1. Reduce the carbon potential gradient of the bed by applying a back pressure in virtue of adjusting the opening of the exhaust stack, so as to reduce the trapped air. 2. Equalize the carbon potential of the bed by feeding the enrich gas into the venting end. 3. By using the methods above accompanied with the gas recirculation system control the carbon potential of the atmosphere. |
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