【正文】 00 100000）元 ＝ 13000萬元 年純利 = 100000=28000萬元 每年的盈利為 28000萬元。投資回收需要時間為 45000/28000=，所以理想情況下， 2年能收回成本。 南華大學(xué)化 學(xué)化工學(xué)院畢業(yè)設(shè)計 第 38 頁 共 64 頁 三、結(jié)論 是具有極好經(jīng)濟(jì)效益的精細(xì)化工產(chǎn)品，適用于各種 有機(jī)化工原料 ，市場前景極為廣闊。 連續(xù) 式生產(chǎn)工藝，設(shè)備簡單，改變生產(chǎn)品種容易，工藝投資收益高，經(jīng)濟(jì)效益很好。 乙苯和水蒸汽 為原料， 脫氫生產(chǎn)出苯乙烯 ； 先后經(jīng)過冷凝、壓縮油水分離、粗餾、精餾收集苯乙烯 。生產(chǎn)技術(shù)成熟、可靠，工藝合理，原料成本相對較低，產(chǎn)品質(zhì)量、產(chǎn)率都很高。 還有這個 生產(chǎn)工藝流程， 操作和設(shè)備都比較穩(wěn)定 ，收效快，適合 大型 企業(yè)選用。 ，而且重要設(shè)備采用了耐腐蝕的不銹鋼 材料，延長了設(shè)備的使用壽命。生產(chǎn)中注重對“三廢”的處理，適應(yīng)綠色化工的步伐，在較大程度上減少了對環(huán)境的污染。 綜上所述本工藝設(shè)計是可行的，而且很有建設(shè)價值。 南華大學(xué)化 學(xué)化工學(xué)院畢業(yè)設(shè)計 第 39 頁 共 64 頁 參考文獻(xiàn) [1]夏清 ， 陳常貴 .化工原理 .天津 [M].天津大學(xué)出版社， 2021 年 [2]賈紹義 ， 柴誠敬 .化工原理課程設(shè)計 .天津 [M]： 天津大學(xué) 出版社， 2021 年 [3]蔡麗娟 .苯乙烯生產(chǎn)技術(shù) [J].化工進(jìn)展 ， 2021（ 3） :7478. [4]饒興鶴 .苯乙烯生產(chǎn)現(xiàn)狀及工藝技術(shù)進(jìn)展 [J].化工生產(chǎn)與技術(shù) ， 2021（ 5） :3335. [5]金秋 .苯乙烯的技術(shù)進(jìn)展 [J].精細(xì)化工 原料及中間體 ， 2021（ 4） ： 1923. [6]左文明 ， 李小軍 .苯乙烯生產(chǎn)工藝及國產(chǎn)化技術(shù)進(jìn)展 [J].煉油與化工 ， 2021（ 3） :5556. [8]左識之 .精細(xì)化工反應(yīng)器及車間工藝設(shè)計 [M].上海：華東理工大學(xué)出版社，1998 年 [9]湯善莆 ,朱思明 .化工設(shè)備機(jī)械基礎(chǔ) [M]（第二版） .上海：華東理工大學(xué)出版社， 2021 年 [10]顧芳珍 ,陳國桓 .化工設(shè)備設(shè)計基礎(chǔ) [M].天津：天津大學(xué)出版社， 1994 年 [11]鄺生魯 .化學(xué)工程師全書 [M].北京：化學(xué)工業(yè)出版 社， 2021 年 [12]國家醫(yī)藥管理局上海醫(yī)藥設(shè)計院 .化工工藝設(shè)計手冊（上） [M].北京：化學(xué)工業(yè)出版社， 1992 年 [13]《化工設(shè)備機(jī)械基礎(chǔ)》編寫組 .化工設(shè)備機(jī)械基礎(chǔ) [M].北京：化學(xué)工業(yè)出版社， 1979 年 [14]唐爾鈞，詹長福 .化工設(shè)備機(jī)械基礎(chǔ) [M].北京：中央廣播電視大學(xué)出版社，1985 年 南華大學(xué)化 學(xué)化工學(xué)院畢業(yè)設(shè)計 第 40 頁 共 64 頁 謝辭 本設(shè)計是在南華大學(xué)化學(xué)化工學(xué)院劉慧君教授的精心指導(dǎo)下完成的，劉老師淵博的知識、嚴(yán)謹(jǐn)?shù)闹螌W(xué)態(tài)度和高度的敬業(yè)精神深深的感染了我，使我在設(shè)計過程中受益頗多，同時也認(rèn)識到了搞 設(shè)計的艱辛，尤其是意識到查資料的重要性，在此，我向劉慧君老師表示崇高的敬意和感謝 ! 在整個畢業(yè)設(shè)計過程中，我們也得到了化學(xué)工程與工藝教研室其他老師以及同學(xué)的熱心幫助，讓我們得以如期完成畢業(yè)設(shè)計，在此，一并向老師和同學(xué)致以由衷的感謝。 由于我自身的知識和認(rèn)識水平有限，設(shè)計中難免有錯誤與不妥之處，懇請老師批評指正。 南華大學(xué)化 學(xué)化工學(xué)院畢業(yè)設(shè)計 第 41 頁 共 64 頁 附錄 英文原文及翻譯 Study on diffusion behavior of water in epoxy resins cured by active ester Mojun Liu, Peiyi Wu, Yifu Ding and Shanjun Li Department of Macromolecular Science and The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Fudan University, Shanghai 202133, China. Email: Received 9th September 2021, Accepted 11th March 2021 First published as an Advance Article on the web 27th March 2021 Phenol novolac resin and a series of esterified phenol novolac resins with side groups of acetate, butyrate and phenylacetate are used as curing agents for OCresol novolac epoxy resin. The cured resins are named as EP, EPA, EPB and EPP respectively. The water diffusion behavior of epoxy works is studied by ATRFTIR spectroscopy and gravimetric method. The obtained results show that the diffusion type of EPA and EPP are quite approximate to Fickian diffusion, while EPB displays a typical Case II characteristic and EP follows anomalous diffusion. The diffusion coefficient of EP is much lower than EPA and EPP. In 2DIR spectra the splitting of water OH vibration band in the range of 2800–3700cm1 and 1500–1800cm1 shows the existence of two different states of water as free and bound water. Water molecules first bind with specific hydrophilic groups as bound water and then diffuse into free volume (microvoids) or molecularly disperse with less hydrogen bonding (bulk dissolve) as free water. Evidence is also found for the strength order of hydrogen bonding interactions between water molecules and epoxy works as EP EPA EPB EPP. 1. Introduction There has been a long standing interest in water sorption in epoxy works16 because water 南華大學(xué)化 學(xué)化工學(xué)院畢業(yè)設(shè)計 第 42 頁 共 64 頁 sorption would bring about a deterioration in excellent properties of epoxy resins. Water sorption is related to the availability of molecularsized free volume holes in the epoxy works and epoxy–water interactions. The availability of holes depends on the polymer structure, morphology and crosslink density. Furthermore water–epoxy interaction depends on the presence of hydrogen bonding sites in the polymer works. The nature of epoxy–water molecular interactions has been studied by various techniques. Woo and Piggott7 suggest clustering of water molecules in epoxy resins. Apicella et al.:8 proposes three sorption models in glassy epoxy: bulk dissolution of water in glassy epoxy works。 moisture sorption onto the surface of excess free volume。 hydrogen bonding between water and epoxy hydrophilic groups. As a results, Adamson9concludes that water molecules first occupy free volume holes then bee bound to works hydrophilic groups which causing swelling, finally, enter the densely crosslinked regions. Moy, Karasz10 and Pethrick11 report the existence the free/bound water types in epoxy resins. However, substantial disagreement still persisted among these models due to their different experimental methods. Recently, following the pioneering work of Fieldsen and Barbari12， 13, the ATRFTIR technique has been quickly developed to provide in situ measurements of both ingress and removal of water from polymer systems. 14～ 16The application of this technique relies on the spectroscopic observation of perate localized within a short distance (–5mm) from the interface between polymer sample and the IRE crystal. It provides not only reliable masstime sorption curves but also rich information of the polymerwater molecular interactions, which in many systems, are the key factor that control the sorption behavior. The generalized twodimensional (2D) IR spectroscopy proposed by Noda1719 has rapidly received great attention in recent years. It emphasizes spectral features not readily observable in conventional onedimensional (1D) spectra and also probes the specific order of certain events taking place with the development of a controlling physical variable. It assists the identification of various inter and intramolecular interactions through the selective correlation of bands20. Aim of the present contribution is to describe in detail the water diffusion beh