本文選題：W/O型乳化液 + 粒徑分布　； 參考：《華東理工大學(xué)》2017年碩士論文

【摘要】：在石油化工工業(yè)中存在許多油液帶水的現(xiàn)象,會(huì)帶來產(chǎn)品質(zhì)量不合格、加工能耗增加及安全隱患等問題。聚結(jié)分離技術(shù)具有分離時(shí)間短、效率高、能耗低等優(yōu)勢,在液-液兩相分離領(lǐng)域得到了研究者的廣泛關(guān)注。本文在流變系數(shù)修正的stokes沉降公式基礎(chǔ)上,采用理論分析與實(shí)驗(yàn)驗(yàn)證的方法,研究了測試W/O型乳化液粒徑分布的新型重力沉降測定法。采用實(shí)驗(yàn)研究與CFD數(shù)值模擬方法,研究了乳化程度、分散相濃度、組合纖維模塊厚度等相關(guān)因素對組合纖維聚結(jié)分離過程內(nèi)部流場、分離性能的影響規(guī)律,并在碳四深度脫甲醇系統(tǒng)實(shí)現(xiàn)技術(shù)應(yīng)用,研究表明:(1)新型重力沉降測定法可以準(zhǔn)確測試W/O型乳化液粒徑分布范圍,利用此方法分析組合纖維聚結(jié)分離模塊對乳化液粒徑分布的再分散作用,增設(shè)二級組合纖維聚結(jié)分離模塊可以有效提升分離性能。.(2)組合纖維聚結(jié)分離過程中,流速與乳化液粒徑分布是影響分離性能的兩大因素,對分離性能影響因素依次為:流速乳液粒徑聚結(jié)模塊厚度體積比表面積分散相濃度。對給定乳化液的操作條件下,組合纖維聚結(jié)分離的流速存在臨界值,流速低于臨界值時(shí),分離效率隨著流速增加基本不變,本研究體系中流速臨界值優(yōu)選0.7m/min。(3)聚結(jié)模塊的壓降隨著流速、模塊厚度增加而線性增加,隨著孔隙率的減小而增加。流體在纖維間隙中存在明顯加速,纖維層間隙中速度分布呈現(xiàn)"M"狀分布。(4)微萃取耦合親疏水組合纖維深度脫水的集成技術(shù)可實(shí)現(xiàn)碳四深度脫甲醇的要求,具有水耗量低、分離精度高、占地面積小的優(yōu)勢。
[Abstract]:There are many phenomena of oil with water in petrochemical industry, which will bring about some problems, such as unqualified product quality, increased energy consumption and hidden safety problems. Because of the advantages of short separation time, high efficiency and low energy consumption, coalescence separation technology has been widely concerned by researchers in the field of liquid-liquid two-phase separation. Based on the modified stokes settlement formula with rheological coefficient, a new gravity sedimentation method for measuring the particle size distribution of W / O emulsion is studied by theoretical analysis and experimental verification. By means of experimental study and CFD numerical simulation, the effects of emulsification degree, dispersion phase concentration and the thickness of composite fiber module on the internal flow field and separation performance of composite fiber were studied. The results show that: (1) the new gravity sedimentation method can accurately measure the particle size distribution range of W / O emulsion. This method is used to analyze the redispersion of composite fiber coalescence separation module on the particle size distribution of emulsion. The addition of secondary composite fiber aggregation separation module can effectively improve the separation performance. (2) in the process of composite fiber aggregation separation, The flow rate and the particle size distribution of the emulsion are two major factors affecting the separation performance. The influencing factors on the separation performance are as follows: the volume specific surface area dispersion phase concentration of the flow rate emulsion particle size coalescence module thickness. When the flow rate is lower than the critical value, the separation efficiency is basically unchanged with the increase of the flow rate. In this study, the critical value of flow rate is chosen to be 0.7m / min. (3) the pressure drop of the coalescence module increases linearly with the flow rate, the thickness of the module increases linearly, and increases with the decrease of porosity. The fluid accelerates obviously in the fiber gap, and the velocity distribution in the fiber layer presents a "M" shape distribution. (4) the integrated technology of microextraction coupled with hydrophilic composite fiber deep dehydration can meet the requirement of carbon four depth methanol removal, and has low water consumption. The advantages of high separation precision and small area.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ028.3

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