【摘要】：氣-液-固三相攪拌反應(yīng)器被廣泛應(yīng)用于精細(xì)化工、石油化工、生物工程等領(lǐng)域。目前氣-液-固三相攪拌反應(yīng)器的傳質(zhì)性能研究主要集中在常溫,熱態(tài)條件下傳質(zhì)性能研究仍然十分缺乏,致使實(shí)際工況下熱態(tài)攪拌反應(yīng)器的設(shè)計(jì)還依賴于常溫研究結(jié)果。本文主要對(duì)熱態(tài)氣-液-固三相攪拌反應(yīng)器進(jìn)行傳質(zhì)性能研究。本文在內(nèi)徑T=0.3m,液位高度H=0.54m的攪拌反應(yīng)器內(nèi),采用底槳為半橢圓管盤式渦輪槳(HEDT),上層和中層槳為四寬葉翼型槳(WHu)形式的攪拌槳,針對(duì)固體體積分?jǐn)?shù)Cv為0～0.12,氣體流量Qg+v、為4m3/h～10m3/h,溫度TK為298K～313K和轉(zhuǎn)速N為8s-1～13s-1的實(shí)驗(yàn)條件進(jìn)行了傳質(zhì)特性的研究。研究結(jié)果表明,臨界懸浮轉(zhuǎn)速Njs隨著通氣量以及固體體積分?jǐn)?shù)的增大而增大,隨著攪拌槳直徑的增大而減�。煌夤β蕼�(zhǔn)數(shù)Np,g隨著固體體積分?jǐn)?shù)以及溫度的上升而增大；傳質(zhì)系數(shù)與固體體積分?jǐn)?shù)呈現(xiàn)負(fù)相關(guān)趨勢(shì),與溫度、表觀氣速和單位質(zhì)量功呈現(xiàn)正相關(guān)趨勢(shì),而且在高固體體積分?jǐn)?shù)、低氣速和高轉(zhuǎn)速時(shí),溫度對(duì)傳質(zhì)系數(shù)影響較為明顯�；谝陨系膶�(shí)驗(yàn)結(jié)果,得到了通氣功率Np,g準(zhǔn)數(shù)和kLa關(guān)于溫度、表觀氣速、攪拌功率及固相含量的經(jīng)驗(yàn)關(guān)聯(lián)式。
[Abstract]:Gas-liquid-solid three-phase stirred reactor is widely used in fine chemical, petrochemical, bioengineering and other fields. At present, the mass transfer performance of gas-liquid-solid three-phase stirred reactor is mainly studied at room temperature, but the study of mass transfer performance under hot condition is still very lacking, so the design of hot-state stirred reactor under actual working condition still depends on the results of study at room temperature. In this paper, the mass transfer performance of hot gas-liquid-solid three-phase agitated reactor is studied. In this paper, in a stirred reactor with an inner diameter of 0.3 m and a liquid level of 0.54 m, the bottom propeller is a semi-elliptical tube-disk turbine propeller with (HEDT), upper layer and the middle propeller with four wide blade airfoil propellers in the form of (WHu). The mass transfer characteristics were studied under the experimental conditions of solid volume fraction (Cv) of 0.12, gas flow rate of Qg v, 4 m3 / h of 10 m3 / h, temperature of TK of 298K~313K and rotational speed of N as 8s-1~13s-1. The results show that the critical suspension speed (Njs) increases with the increase of aeration volume and the volume fraction of solid, and decreases with the increase of impeller diameter, and the number of aeration power Np,g increases with the increase of solid volume fraction and temperature. The mass transfer coefficient showed a negative trend with solid volume fraction, and a positive correlation with temperature, apparent gas velocity and unit mass work. Moreover, the effect of temperature on mass transfer coefficient was obvious at high solid volume fraction, low gas velocity and high rotational speed. Based on the above experimental results, the empirical correlations of Np,g number of ventilation power and kLa on temperature, apparent gas velocity, stirring power and solid content are obtained.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ027.2

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本文編號(hào)：2210300