本文選題：卷式膜組件 + 炭膜　； 參考：《大連理工大學》2015年碩士論文

【摘要】：氣體分離膜技術是一種新型氣體分離技術,它具有能耗低、分離效率高、容易操作等優(yōu)點。性能優(yōu)異的膜材料是膜分離技術的核心,炭膜作為一種新型的無機膜,在氣體分離方面具有優(yōu)異的選擇性,使得它具有廣闊的發(fā)展前景。將膜材料制備成填裝密度高、結構簡單、易于放大的膜組件是將膜材料付諸實際應用的前提。常用的氣體分離膜組件包括卷式、管式、板框式和中空纖維式膜組件,其中卷式膜組件的填裝密度較高,能夠對分離膜污染的控制、操作難度、堆積密度和滲透量的大小等重要問題進行較好的平衡,在工業(yè)應用中受到青睞。大連理工大學炭膜及多孔炭材料課題組研制出一種柔性的卷式炭膜,解決了傳統(tǒng)炭膜機械強度差、不具有柔韌性的問題。為了推進卷式炭膜的工業(yè)化應用,本文針對卷式炭膜的膜組件制備進行研究。本文從研究粘結劑的基本性能入手,通過對粘結劑的固化時間、氣密性、剝離強度以及氣體滲透性的考察,選擇出適宜制備炭膜膜組件的粘結劑；研究卷式炭膜膜組件中膜元件的直徑隨膜袋數量的變化關系,計算相關位置參數,并確定膜片、隔網等的位置關系,研究、選擇和優(yōu)化膜組件的卷制方法；制備出適用于卷式炭膜氣體分離的膜組件。單組份聚氨酯粘結劑的固化時間長、氣密性好、剝離強度大、測試氣體幾乎不能滲透,因此制備卷式炭膜膜組件效果最好的粘結劑是單組份聚氨酯。對膜組件卷制方法進行研究,得出每增加一個膜口袋,膜元件的橫截面積量增加1592mm2,得出不同個數的膜口袋制備膜元件的相應直徑,并計算錯位量。粘結劑的質量隨固化時間的變化先升高后降低,結合粘結劑的固化機理分析得出膜組件的卷制時間要控制在1個小時內。單組份聚氨酯粘結劑對卷式炭膜的浸潤性優(yōu)于聚合物膜,因此其對于卷式炭膜的粘附效果比聚合物膜更好。為了進行膜組件的氣體滲透性能測試,配制甲烷與二氧化碳的混合氣,根據二者的配氣質量流量所得的甲烷濃度為x(%),配制完成的混合氣中甲烷的濃度為y(%),x與y的關系為：y=0.9198x+0.0389。利用所配制的混合氣對制備的膜組件進行氣體滲透性能測試,膜組件的氣體分離選擇性與膜片的氣體分離性能吻合,結果合理,說明本文對于氣體分離卷式炭膜膜組件的研制具有可行性。
[Abstract]:Gas separation membrane technology is a new gas separation technology, which has the advantages of low energy consumption, high separation efficiency and easy operation.Membrane material with excellent performance is the core of membrane separation technology. As a new inorganic membrane, carbon membrane has excellent selectivity in gas separation, which makes it have a broad development prospect.It is the premise of practical application to fabricate membrane material into membrane assembly with high filling density, simple structure and easy amplification.The commonly used membrane assemblies for gas separation include coil, tubular, plate-frame and hollow fiber membrane assemblies, in which the packing density of the membrane assembly is high, and the fouling of the separation membrane can be controlled and the operation is difficult.The important issues such as packing density and permeability are well balanced and are favored in industrial applications.The carbon membrane and porous carbon materials team of Dalian University of Technology have developed a kind of flexible carbon film which solves the problem that the mechanical strength of the traditional carbon membrane is poor and it is not flexible.In order to promote the industrial application of reel carbon membrane, the preparation of membrane module of reel carbon membrane was studied in this paper.Based on the study of the basic properties of the binder, the binder suitable for the preparation of carbon membrane assembly was selected by investigating the curing time, gas tightness, peeling strength and gas permeability of the binder.The relationship between the diameter of membrane components and the number of film bags was studied, the relative position parameters were calculated, and the position relationships of the membrane plates and spacers were determined, and the methods of coiling of membrane assemblies were studied, selected and optimized.A membrane assembly suitable for carbon membrane gas separation was prepared.One-component polyurethane binder has the advantages of long curing time, good air tightness, high peeling strength and almost no penetration of test gas, so the best binder for the preparation of carbon membrane assembly is one-component polyurethane.The method of membrane assembly coiling is studied. It is concluded that the cross-sectional area of membrane element increases by 1592 mm ~ 2 for each additional membrane pocket, and the corresponding diameter of different number of membrane pockets is obtained, and the dislocation amount is calculated.The mass of binder increased firstly and then decreased with the change of curing time. The curling time of membrane assembly should be controlled within 1 hour by analyzing the curing mechanism of binder.The wettability of one-component polyurethane binder is better than that of polymer film, so the adhesive effect of one-component polyurethane binder is better than that of polymer film.The gas permeation performance of the prepared membrane assembly is tested by using the prepared mixture. The gas separation selectivity of the membrane assembly is in agreement with the gas separation performance of the membrane, and the results are reasonable.It shows that this paper is feasible for the development of carbon membrane assembly for gas separation.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ051.893

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