本文選題：反應精餾塔　切入點：多反應段　出處：《北京化工大學》2015年碩士論文

【摘要】：傳統(tǒng)的反應精餾塔將反應和分離兩個操作單元結(jié)合在同一個裝置中,有效解決了部分反應過程和分離過程的難題。相比反應器-精餾塔連續(xù)過程,反應精餾塔使系統(tǒng)整體的效率提高,同時設備投資和操作費用顯著降低,有效地強化了內(nèi)部物質(zhì)耦合與內(nèi)部能量耦合。經(jīng)過大量基礎的理論研究,反應精餾塔在實際生產(chǎn)中已經(jīng)得到了相當廣泛的應用,在很多反應過程中起到提高反應和分離的效率的重要作用,為化工生產(chǎn)過程降低了巨大的成本。傳統(tǒng)的反應精餾塔擅長解決單個反應體系的反應分離問題。對于多步連續(xù)反應系統(tǒng),目前工業(yè)上仍采用傳統(tǒng)的單反應段反應精餾塔(RDC-SRS)串聯(lián)的方案,以此串聯(lián)的若干反應精餾塔中的每個反應精餾塔發(fā)生一個反應,隨著反應連續(xù)進行,反應混合物依次傳遞。這種方案的優(yōu)勢是反應系統(tǒng)相對穩(wěn)定,但是缺陷在于設備投資和操作成本過高。如果由一個單獨的反應精餾塔進行多步連續(xù)反應,則各個反應之間會因為物質(zhì)的相互干擾而抑制某些反應,出現(xiàn)轉(zhuǎn)化率低、反應速率慢等問題。本文設計了多反應段反應精餾塔(RDC-MRS)來解決上述難題。本研究分別設計了三反應段反應精餾塔(RDC-TRS),雙反應段反應精餾塔(RDC-DRS)以及雙反應段反應精餾塔的一種特殊結(jié)構(gòu)——隔離壁雙反應段反應精餾塔(DWRDC-DRS)以探究它們的原理、設計方法以及節(jié)能效果。以上幾種RDC-MRS通過塔內(nèi)設置多個反應段的方案使不同的反應盡可能發(fā)生在不同的反應段,這樣各個反應之間的干擾會明顯降低,進而提高了反應轉(zhuǎn)化率和反應速率,強化了內(nèi)部物質(zhì)耦合與內(nèi)部能量耦合。同時多個反應段以及若干反應段之間的間隔段為RDC-MRS提供了更多的自由度,使各反應段的安排更加自由靈活,保證系統(tǒng)設計空間和RDC-MRS的節(jié)能有效性。本文應用化上流程仿真軟件Aspen Plus對各類反應精餾塔進行建模仿真模擬。所設計的RDC-TRS和RDC-DRS應用三氯甲硅烷制備硅烷這一太陽能行業(yè)中的重要反應體系進行仿真模擬實驗,來驗證它們的節(jié)能效果。在保證總塔板數(shù)不變和總反應段數(shù)不變的情況下,通過仿真實驗中嚴謹?shù)膶Ρ壤淠鳠嶝摵膳c再沸器熱負荷驗證了RDC-TRS和RDC-DRS相比傳統(tǒng)的RDC-SRS有著顯著的節(jié)能效果。仿真結(jié)果表明,RDC-TRS相對傳統(tǒng)的(RDC-SRS)可以節(jié)約操作費用11%以上,RDC-DRS相對于RDC-SRS可以節(jié)約操作費用約9%,證明了RDC-TRS與RDC-DRS優(yōu)越的節(jié)能效果。此外,DWRDC-DRS應用間接水合法由環(huán)己烯制備環(huán)己醇的實例來進行仿真實驗,雖然產(chǎn)品質(zhì)量并未完全達到標準,但仍然可以從仿真記過結(jié)果分析出DWRDC-DRS的節(jié)能潛力,這種新型結(jié)構(gòu)的反應精餾塔值得繼續(xù)開拓研究。
[Abstract]:The traditional reactive distillation reaction and combined into a device in two operating units separated, to effectively solve the problem of partial reaction and separation process. Compared with the reactor and distillation column continuous reactive distillation process, to improve the overall efficiency of the system, and the equipment investment and the operating cost is significantly reduced, effectively strengthening the internal coupling and internal energy coupling. Through a lot of theoretical research foundation, reactive distillation has been widely used in the actual production, plays an important role in the increase of reaction and separation efficiency in the reaction process, reduce the huge cost for chemical production process. The traditional reactive distillation tower good at solving single reaction separation problem. For multi step continuous reaction system, the industry is still using the traditional single reaction distillation column (RDC-SRS) series. In each case, the reactive distillation tower of this series of reactive distillation in a reaction, with the reaction, the reaction mixture is passed. This scheme is the advantage of relatively stable reaction system, but the drawback is that the equipment investment and the operation cost is too high. If a single reactive distillation column for multistep continuous reaction then, between each reaction because of mutual interference substances and inhibit some reaction, appear low conversion rate, problem of slow reaction rate. The paper has designed the reaction section of reactive distillation column (RDC-MRS) to solve the above problem. This paper designed three reaction section of reactive distillation column (RDC-TRS), double reaction reaction distillation column (RDC-DRS) and the double reaction section of reactive distillation tower is a kind of special structure of double - wall reaction section of reactive distillation column (DWRDC-DRS) to explore their principle, design method and energy saving The effect of several RDC-MRS through the tower above. The reaction section is provided with a plurality of solutions enable different reactions as possible in the reaction section is different, so the interference between each reaction will decrease, and then improve the reaction rate and reaction rate, strengthen the internal coupling and internal energy coupling. At the same time intervals between a plurality of reaction and some of the reaction section RDC-MRS provides more degrees of freedom, so that the reaction section arrangement is more flexible and ensure energy-saving effectiveness of the system design space and RDC-MRS. Based on the process simulation software Aspen Plus modeling simulation of reactive distillation tower. The RDC-TRS and RDC-DRS application of three dichlorosilane system the preparation of this important reaction system of silane in solar industry simulation experiments to verify their energy-saving effect. The total number of plates and the same The total number of reaction stages unchanged, by comparing the condenser heat load rigorous simulation and heat load of the reboiler is verified and compared with the traditional RDC-TRS RDC-DRS RDC-SRS has a significant energy saving effect. The simulation results show that compared with the traditional RDC-TRS (RDC-SRS) can save operating cost more than 11%, compared with RDC-DRS RDC-SRS can save the operating costs of about 9%, proved that the energy saving effect of RDC-TRS and RDC-DRS superior. In addition, the application of DWRDC-DRS method by indirect hydration of Cyclohexene to cyclohexanol by example to carry out simulation experiment, although not all end product quality reach the standard, but still can analyze the energy saving potential of DWRDC-DRS simulation results from the demerit of reactive distillation tower. This new structure is to continue to develop.

【學位授予單位】：北京化工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ053.5

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相關(guān)期刊論文 前1條

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本文編號：1714846