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攪拌機的發(fā)展概述

來(lái)源: 時(shí)間:2012-12-10 14:46:41 瀏覽次數:

攪拌器是化學(xué)工程和生物工程中最常見(jiàn)也是最重要的單元設備之一。目前,攪拌器的選型和內構件的設計在很大程度上依賴(lài)試驗和經(jīng)驗,對放大規模還缺乏深入的認識,對于能耗和生產(chǎn)成本只能在一定規模的生產(chǎn)裝置上對比后才能得出結論

攪拌機的操作性能直接關(guān)系到產(chǎn)品的質(zhì)量、能耗和生產(chǎn)成本,工程界和學(xué)術(shù)界對攪拌混合都非常重視,進(jìn)行了大量的研究工作,取得了不少的研究成果。

攪拌器是化學(xué)工程和生物工程中常見(jiàn)也是重要的單元設備之一。目前,攪拌器的選型和內構件的設計在很大程度上依賴(lài)試驗和經(jīng)驗,對放大規模還缺乏深入的認識,對于能耗和生產(chǎn)成本只能在一定規模的生產(chǎn)裝置上對比后才能得出結論,由于對產(chǎn)品的回收率和質(zhì)量要求越來(lái)越高,對攪拌器的研究日趨深入,已從早期對攪拌功率和混合時(shí)間的研究,20世紀80年代對反應釜內的流體速度場(chǎng)分布的研究,進(jìn)入20世紀90年代以來(lái)的攪拌釜內三維流場(chǎng)的數值模擬研究。流場(chǎng)數值模擬必須在深入進(jìn)行流體力學(xué)研究的基礎上,綜合考慮流體流動(dòng)的三維性、隨機性、非線(xiàn)性和邊界條件不確定性。通過(guò)數值模擬不但可以解決反應器的放大機理,而且可以?xún)?yōu)化設計開(kāi)發(fā)新型攪拌器,使機械攪拌器的設計理論更加完善。

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