發(fā)布時(shí)間：2018-07-04 10:59

  本文選題：己二腈 + 丁二烯　； 參考：《青島科技大學(xué)》2017年碩士論文

【摘要】：己二腈是一種應(yīng)用十分廣泛的化工產(chǎn)品,可用于生產(chǎn)尼龍66和六亞甲基二異氰酸脂(HDI),在現(xiàn)有的生產(chǎn)技術(shù)中,丁二烯氫氰化法是目前世界上最為先進(jìn)的方法,也是我國(guó)己二腈生產(chǎn)技術(shù)的主要研究方向,因此本文主要針對(duì)丁二烯氫氰化法生產(chǎn)己二腈的生產(chǎn)工藝技術(shù)進(jìn)行研究,并采用大型流程模擬軟件Aspen Plus對(duì)自行設(shè)計(jì)的工藝進(jìn)行數(shù)值模擬與優(yōu)化。本文依據(jù)該技術(shù)反應(yīng)原理以及其工藝特點(diǎn),將該己二腈生產(chǎn)工藝過(guò)程分為三個(gè)工段進(jìn)行設(shè)計(jì):一級(jí)氫氰化工段、異構(gòu)化工段、二級(jí)氫氰化工段。在一級(jí)氫氰化工段設(shè)計(jì)中,本文針對(duì)HCN溶解度大、難回收的特點(diǎn)提出采用汽提的方法,同時(shí)采用1,3-丁二烯作為汽提劑,使得后續(xù)工段中HCN的含量低于10PPM,同時(shí)對(duì)于催化劑的高溫易分解的特點(diǎn)采用減壓精餾的方法對(duì)其進(jìn)行回收,對(duì)于2-甲基-3-丁烯腈和3-PN的精制提出三種分離方案。本文針對(duì)二級(jí)氫氰化工段中的反應(yīng)產(chǎn)物含量多且相對(duì)復(fù)雜提出四種分離方案,并采用Aspen Plus對(duì)其進(jìn)行模擬優(yōu)化,得到精餾塔相關(guān)的操作參數(shù)。本文提出采用年度費(fèi)用函數(shù)模型對(duì)一級(jí)氫氰化工段和二級(jí)氫氰化工段中的分離方案進(jìn)行經(jīng)濟(jì)評(píng)價(jià),確定一級(jí)氫氰化和二級(jí)氫氰化工段的工藝流程。并將三個(gè)工段流程進(jìn)行整合得到己二腈生產(chǎn)工藝流程,并對(duì)該工藝流程進(jìn)行模擬與優(yōu)化,該工藝最終得到質(zhì)量分率為99.9%的己二腈和99.7%的二甲基戊烯腈。采用夾點(diǎn)技術(shù)對(duì)得到的己二腈的生產(chǎn)工藝流程進(jìn)行分析,可使得該流程中的冷、熱物流進(jìn)行匹配,換熱網(wǎng)絡(luò)通過(guò)熱集成后,使得冷、熱公用工程用量分別節(jié)能30.6%、41.8%。
[Abstract]:Hexacrylonitrile is a widely used chemical product, which can be used to produce nylon 66 and hexamethylene diisocyanate (HDI). In the existing production technology, butadiene hydrocyanidation is the most advanced method in the world. It is also the main research direction of adipic acrylonitrile production technology in China, so this paper mainly focuses on the production technology of adipic acrylonitrile by hydrocyanidation of butadiene. Aspen Plus is used to simulate and optimize the process. According to the principle of the technology and its characteristics, the production process of adipic acrylonitrile is divided into three sections: first stage, isomerization stage and secondary stage of hydrocyanide. In the design of the first stage of hydrocyaniding stage, in view of the characteristics of high solubility of HCN and difficulty in recovering HCN, the method of stripping was put forward, and 1 ~ (3) -butadiene was used as stripping agent at the same time. The content of HCN in the subsequent section is lower than 10 PPM.The catalyst is easily decomposed at high temperature and is recovered by vacuum distillation. Three separation schemes are proposed for the purification of 2-methyl-3-butenonitrile and 3-PN. In this paper, four separation schemes are proposed for the high content and relatively complex reaction products in the secondary hydrocyanide section. The operation parameters of the distillation column are obtained by using Aspen Plus to simulate and optimize them. In this paper, the annual cost function model is used to evaluate the separation schemes of the first stage and the second stage of hydrocyanide, and the technological process of the first stage and the second stage of hydrogen cyanide are determined. The process flow of adipic acrylonitrile was integrated into three sections, and the process was simulated and optimized. Finally, 99.9% of adiponitrile and 99.7% of dimethyl pentenitrile were obtained by this process. The production process of adiponitrile is analyzed by pinch technology, which can make the cold and heat logistics match in the process. After heat exchange network is integrated, the consumption of cold and hot public works can be saved 30.6% 41.8% respectively.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ226.61

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本文編號(hào)：2095852