【摘要】：煤炭的清潔利用對(duì)我國(guó)經(jīng)濟(jì)發(fā)展和能源安全具有重要作用,煤氣化是煤炭清潔利用的主要方式之一。在煤氣化的生產(chǎn)過(guò)程中,有大量的含酚廢水產(chǎn)生,會(huì)對(duì)環(huán)境造成較大危害。酚萃取可以降低廢水的污染負(fù)荷,同時(shí)可以回收廢水中的酚類污染物。開(kāi)發(fā)高效、低成本的萃取劑,對(duì)于兼顧經(jīng)濟(jì)效益與環(huán)境保護(hù)具有重要意義。本研究對(duì)甲基戊烯酮用作脫酚萃取劑的相平衡關(guān)系及工程化應(yīng)用進(jìn)行了研究。首先,本文對(duì)以甲基戊烯酮為萃取劑處理含酚廢水的液液相平衡關(guān)系進(jìn)行了研究。借助氣質(zhì)聯(lián)用儀,以Agilent 6890N/5973MSD為工作站,選取Agilent HP-INNOWax作為色譜柱測(cè)定了25、40和50℃下甲基戊烯酮—水—苯酚三元體系和40℃下甲基戊烯酮—水—苯酚—間甲酚四元體系的液液相平衡數(shù)據(jù),并繪制成相圖。對(duì)三、四元體系分配系數(shù)和選擇性系數(shù)進(jìn)行分析。然后采用NRTL活度系數(shù)模型對(duì)三、四元體系液液相平衡數(shù)據(jù)進(jìn)行數(shù)據(jù)回歸,并通過(guò)選擇合適的αij值,得到了三、四元體系各物質(zhì)間的二元相互作用參數(shù)。利用實(shí)驗(yàn)值與計(jì)算值之間的相對(duì)均方根誤差(RMS E)對(duì)擬合效果進(jìn)行評(píng)價(jià),結(jié)果顯示在實(shí)驗(yàn)溫度范圍內(nèi)三元體系相對(duì)均方根誤差(RMSE)小于2%,四元體系相對(duì)均方根誤差(RMSE)小于3%,表明NRTL模型能很好地描述上述三,四元體系液液相平衡關(guān)系。獲得的二元相互作用參數(shù)可用于多元體系相行為的預(yù)測(cè),同時(shí)也為工廠流程模擬計(jì)算提供了設(shè)計(jì)依據(jù),為進(jìn)一步為甲基戊烯酮作為萃取劑的應(yīng)用從理論上和實(shí)踐上分析奠定了基礎(chǔ)。最后,借助Aspen Plus模擬軟件,采用得到的相平衡關(guān)系,對(duì)以甲基戊烯酮為萃取劑的酚萃取工藝流程進(jìn)行了概念化設(shè)計(jì)。經(jīng)過(guò)靈敏度分析,對(duì)該流程工藝參數(shù)進(jìn)行了優(yōu)化,確定了較優(yōu)的工藝參數(shù),從而為甲基戊烯酮作為酚萃取劑工業(yè)化應(yīng)用提供依據(jù)
[Abstract]:The clean utilization of coal plays an important role in the economic development and energy security of our country. Coal gasification is one of the main ways of clean utilization of coal. In the process of coal gasification, a large amount of phenol-containing wastewater is produced, which will cause great harm to the environment. Phenol extraction can reduce the pollution load of wastewater and recover phenolic pollutants from wastewater. The development of high efficiency and low cost extractant is of great significance for both economic benefits and environmental protection. The phase equilibrium relationship of methyl pentenone as extractant and its engineering application were studied. Firstly, the liquid-liquid equilibrium relationship of phenolic wastewater treated with methyl pentenone as extractant was studied. With the help of GC-MS, with Agilent 6890N/5973MSD as the workstation, The liquid-liquid equilibrium data of methyl pentenone-water-phenol ternary system and methyl pentenone-water-phenol ternary system at 40 鈩，

本文編號(hào)：2256515