【摘要】：以氯化鈉水溶液為制冰溶液,采用真空法制備得到冰漿。從理論上論證非等溫結(jié)晶動(dòng)力學(xué)模型Jeziorny法和Mo法用于描述冰漿結(jié)晶行為的可行性。通過(guò)實(shí)驗(yàn)測(cè)定不同結(jié)晶時(shí)間下的冰漿含冰率,并建立了冰漿生成過(guò)程的非等溫動(dòng)力學(xué)方程。研究結(jié)果表明:Jeziorny法和Mo法可很好地描述冰漿的非等溫結(jié)晶過(guò)程;Jeziorny模型指數(shù)n的值在0.473~0.525間,表明不同實(shí)驗(yàn)條件下的結(jié)晶機(jī)理基本一致,冰晶呈片狀增厚生長(zhǎng);Jeziorny模型中的結(jié)晶動(dòng)力學(xué)參數(shù)K_c、t_(0.25)和Mo模型中的冷卻速率函數(shù)F(T)的變化規(guī)律均表明高冷卻速率可促進(jìn)冰漿的形成,同時(shí)氯化鈉的添加會(huì)在一定程度上抑制冰晶生長(zhǎng)。
[Abstract]:Ice slurry was prepared by vacuum method using sodium chloride aqueous solution as ice making solution. The feasibility of using the non-isothermal crystallization kinetic model Jeziorny and Mo to describe the crystallization behavior of ice slurry is theoretically demonstrated. The ice content of ice slurry at different crystallization time was measured experimentally, and the non-isothermal kinetic equation of ice slurry formation was established. The results show that the non-isothermal crystallization process of ice slurry can be well described by Jeziorny method and Mo method, and the Jeziorny model index n is between 0.473 and 0.525, which indicates that the crystallization mechanism is basically the same under different experimental conditions, and the ice crystal grows in the form of sheet thickening. The changes of crystallization kinetic parameters K _ St _ (0.25) in Jeziorny model and cooling rate function F (T) in Mo model indicate that high cooling rate can promote the formation of ice slurry. At the same time, the addition of sodium chloride can inhibit the growth of ice crystals to some extent.
【作者單位】： 福州大學(xué)石油化工學(xué)院;
【基金】：國(guó)家基礎(chǔ)科學(xué)人才培養(yǎng)基金項(xiàng)目(J1103303) 福建省中青年教師教育科研項(xiàng)目(JA14053)~~
【分類號(hào)】：TB66

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本文編號(hào)：2417684