發(fā)布時間：2018-03-02 13:14

  本文選題：Agrawal分壁精餾塔　切入點：穩(wěn)態(tài)　出處：《石油學(xué)報(石油加工)》2017年06期 　論文類型：期刊論文

【摘要】：分壁精餾塔(Agrawal divided-wall column,ADWC)內(nèi)部有上、下2個分隔壁,可實現(xiàn)四組分混合物的高純度分離。建立了分離苯(Benzene,B)、甲苯(Toluene,T)、二甲苯(o-Xylene,X)和均三甲苯(1,3,5-Trimethylbenzene,H)的ADWC穩(wěn)態(tài)嚴格精餾模型,經(jīng)濟優(yōu)化后得到最優(yōu)的塔體結(jié)構(gòu)和操作參數(shù)。與常規(guī)三塔流程、Kaibel分壁精餾塔和強化Petlyuk分壁精餾塔進行能耗優(yōu)勢對比。結(jié)果表明,ADWC結(jié)構(gòu)具有能耗和經(jīng)濟優(yōu)勢。與Kaibel分壁精餾塔相比,ADWC可節(jié)約10%左右的能耗和投資;與強化Petlyuk分壁精餾塔相比,ADWC結(jié)構(gòu)簡單并可在較少分離區(qū)域完成混合物的高效分離。穩(wěn)態(tài)下全塔液相分布表明,在預(yù)分餾段內(nèi)需實現(xiàn)甲苯和均三甲苯的清晰分割,中間塔段需要實現(xiàn)苯和二甲苯的清晰分割,主塔的上、中、下段分別完成苯和甲苯、甲苯和二甲苯、二甲苯和均三甲苯的清晰分割,在預(yù)分餾段和中間塔的底部二甲苯和甲苯略有返混現(xiàn)象。基于不同分氣比下ADWC能耗和側(cè)線組成分析結(jié)果,在Aspen Dynamic中建立了5×5的組分控制結(jié)構(gòu),該結(jié)構(gòu)在發(fā)生±20%的流量和進料組成波動時,具有較優(yōu)的控制效果。
[Abstract]:The high purity separation of four components mixture can be realized in the upper and the lower two fractions in the fractionation tower Agrawal divided-wall column. The ADWC steady-state strict distillation model was established for the separation of Benzenebrium, toluene Tolueneo, XyleneX and 1,335-TrimethylbenzeneH). After economic optimization, the optimal tower structure and operation parameters were obtained. Compared with the conventional three-tower process Kaibel fractionation tower and the reinforced Petlyuk fractionator, the results showed that the Kaibel structure had the advantages of energy consumption and economy. The energy consumption and investment of the fractionated distillation column can be reduced by about 10% compared with that of the fractionated distillation column. Compared with the enhanced Petlyuk fractionation column, the structure of Petlyuk is simple and the mixture can be separated efficiently in less separation area. The liquid phase distribution of the whole column shows that the separation of toluene and trimethylbenzene can be achieved clearly in the prefractionation stage. In the middle column, benzene and xylene need to be divided clearly. The upper, middle and lower sections of the main tower are divided into benzene and toluene, toluene and xylene, xylene and terylene, respectively. The mixture of xylene and toluene at the bottom of the prefractionation section and the middle tower is slightly reversed. Based on the results of energy consumption and side line composition analysis of ADWC at different gas fraction ratios, a 5 脳 5 component control structure is established in Aspen Dynamic. When 鹵20% flow rate and feed composition fluctuate, the structure has better control effect.
【作者單位】： 華東理工大學(xué)化學(xué)工程聯(lián)合國家重點實驗室;
【基金】：國家自然科學(xué)基金項目(21476081) 上海市教育委員會科研創(chuàng)新重點項目(14ZZ058) 教育部基本科研業(yè)務(wù)費青年探索基金項目(WA1514306)資助
【分類號】：TQ028.31;TQ241
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本文編號：1556668