分散降液篩板塔的性能研究
發(fā)布時(shí)間：2018-08-05 11:31
【摘要】：在傳質(zhì)分離領(lǐng)域,板式塔一直有廣泛的應(yīng)用,近年來(lái),復(fù)合塔的發(fā)展逐漸成為該行業(yè)的主角�，F(xiàn)有復(fù)合塔板大多采用已有塔板與填料的復(fù)合,塔板作為復(fù)合塔的核心部件,其作用不可忽視。因而,對(duì)復(fù)合塔板的開(kāi)發(fā)也受到研究人員的廣泛關(guān)注,研發(fā)合適的塔板是解決問(wèn)題的核心。本課題研發(fā)了一種新型板式塔——分散降液篩板塔(DDST),主要對(duì)傳統(tǒng)篩板的集中型降液管進(jìn)行了改進(jìn),將傳統(tǒng)篩板的弓形降液管改為數(shù)根均勻分布于塔板下的圓形細(xì)管,位于氣孔構(gòu)成的正三角形的中心。分散降液篩板塔正常操作工況下,上升的氣體自下而上經(jīng)由塔板的氣孔穿過(guò)液層,板面上的液體自上而下通過(guò)均勻分布的分散降液管降至塔板下層空間。與傳統(tǒng)篩板相比分散降液篩板具有如下的由點(diǎn):1)塔板的鼓泡區(qū)域面積、氣體和液體通道面積、塔的利用空間等均顯著增加;2)消除液面落差;3)全塔上下全部空間形成一個(gè)連續(xù)、立體的微分式氣液接觸的傳質(zhì)過(guò)程;4)將分散降液篩板可以作為復(fù)合塔板的塔板組件具有良好的前景。本文以“氧氣-空氣-水”為體系,初步探討了分散降液篩板塔的水力學(xué)性能、傳質(zhì)性能及其影響因素,并與傳統(tǒng)篩板塔進(jìn)行比較。結(jié)果表明:分散降液篩板壓降小,霧沫夾帶和相對(duì)漏液量均低于10%,具有良好的水力學(xué)性能,在同等條件下傳質(zhì)效率比傳統(tǒng)篩板塔提高了約8.4%~9.7%。對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行關(guān)聯(lián)回歸,得出了分散降液篩板塔初步的水力學(xué)性能數(shù)學(xué)模型。分散降液篩板塔可以方便實(shí)現(xiàn)與填料等的復(fù)合,通過(guò)實(shí)驗(yàn)研究為今后采用分散降液篩板復(fù)合塔的研究奠定基礎(chǔ),同時(shí)為其工業(yè)應(yīng)用提供理論依據(jù)。分散降液篩板塔作為門類眾多的塔設(shè)備家族的新成員,不僅有望在傳統(tǒng)的傳質(zhì)分離領(lǐng)域得到應(yīng)用,在組合或復(fù)合塔領(lǐng)域更展示了其特殊優(yōu)勢(shì)。
[Abstract]:In the field of mass transfer separation, plate tower has been widely used. In recent years, the development of composite tower has gradually become the main role of the industry. Most of the existing composite trays are composed of existing trays and fillers, which can not be ignored as the core components of the composite towers. Therefore, the development of composite trays has been widely concerned by researchers, the research and development of suitable trays is the core of the problem. In this paper, a new type of plate-type tower, (DDST), has been developed to improve the centralized downflow pipe of traditional sieve plate, which is changed into several circular tubes distributed uniformly under the tray. Located at the center of an equilateral triangle formed by a stomata. Under normal operation condition, the rising gas passes through the air holes of the tray through the liquid layer, and the liquid on the plate drops from top to bottom to the lower space of the tray through the uniform distribution of the droplet tube. Compared with the traditional sieve plate, the dispersed down-liquid sieve plate has the following areas of bubbling area, gas and liquid passage area, tower utilization space and so on, which are significantly increased by point: 1) the area of the bubble area of the tray, and the utilization space of the tower, etc. (3) eliminating the drop difference of liquid level. 3) the whole tower forms a continuous space from all the upper and lower spaces. The dispersion drop sieve plate can be used as the tray assembly of composite tray in the process of mass transfer of three-dimensional micro-fraction gas-liquid contact. Based on the system of "oxygen, air and water", the hydraulics properties, mass transfer properties and influencing factors of dispersed down-liquid sieve tray column are discussed in this paper, and compared with the traditional sieve plate column. The results show that the pressure drop is small, the entrainment and the relative leakage are lower than 10, and the mass transfer efficiency is better than that of the traditional sieve tray under the same conditions. The mass transfer efficiency is about 8.49.7g higher than that of the traditional sieve tray. Based on the correlation regression of experimental data, a preliminary mathematical model of hydraulic performance of the dispersive down-liquid sieve tray column was obtained. The composite of dispersed down-liquid sieve plate column and filler can be realized conveniently. The experimental study will lay a foundation for the future study of the dispersed down-liquid sieve plate composite column and provide the theoretical basis for its industrial application. As a new member of a large number of families of tower equipment, the dispersive down-liquid sieve tray column is expected to be used in the traditional mass transfer separation field, and it also shows its special advantages in the field of combination or composite column.
【學(xué)位授予單位】：延安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ053.5
本文編號(hào)：2165662
[Abstract]:In the field of mass transfer separation, plate tower has been widely used. In recent years, the development of composite tower has gradually become the main role of the industry. Most of the existing composite trays are composed of existing trays and fillers, which can not be ignored as the core components of the composite towers. Therefore, the development of composite trays has been widely concerned by researchers, the research and development of suitable trays is the core of the problem. In this paper, a new type of plate-type tower, (DDST), has been developed to improve the centralized downflow pipe of traditional sieve plate, which is changed into several circular tubes distributed uniformly under the tray. Located at the center of an equilateral triangle formed by a stomata. Under normal operation condition, the rising gas passes through the air holes of the tray through the liquid layer, and the liquid on the plate drops from top to bottom to the lower space of the tray through the uniform distribution of the droplet tube. Compared with the traditional sieve plate, the dispersed down-liquid sieve plate has the following areas of bubbling area, gas and liquid passage area, tower utilization space and so on, which are significantly increased by point: 1) the area of the bubble area of the tray, and the utilization space of the tower, etc. (3) eliminating the drop difference of liquid level. 3) the whole tower forms a continuous space from all the upper and lower spaces. The dispersion drop sieve plate can be used as the tray assembly of composite tray in the process of mass transfer of three-dimensional micro-fraction gas-liquid contact. Based on the system of "oxygen, air and water", the hydraulics properties, mass transfer properties and influencing factors of dispersed down-liquid sieve tray column are discussed in this paper, and compared with the traditional sieve plate column. The results show that the pressure drop is small, the entrainment and the relative leakage are lower than 10, and the mass transfer efficiency is better than that of the traditional sieve tray under the same conditions. The mass transfer efficiency is about 8.49.7g higher than that of the traditional sieve tray. Based on the correlation regression of experimental data, a preliminary mathematical model of hydraulic performance of the dispersive down-liquid sieve tray column was obtained. The composite of dispersed down-liquid sieve plate column and filler can be realized conveniently. The experimental study will lay a foundation for the future study of the dispersed down-liquid sieve plate composite column and provide the theoretical basis for its industrial application. As a new member of a large number of families of tower equipment, the dispersive down-liquid sieve tray column is expected to be used in the traditional mass transfer separation field, and it also shows its special advantages in the field of combination or composite column.
【學(xué)位授予單位】：延安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ053.5
【參考文獻(xiàn)】
相關(guān)期刊論文 前3條
1 劉繼東,李春利,李柏春,李平;新型垂直篩板塔空間持液量與塔板效率的研究[J];河北工業(yè)大學(xué)學(xué)報(bào);2000年05期
2 錢建兵,朱慎林;影響精餾塔板效率因素探討[J];化工時(shí)刊;2003年07期
3 李志強(qiáng),許慶茂,張東文,王柱祥;新型垂直篩板技術(shù)[J];化工進(jìn)展;2001年10期
，本文編號(hào)：2165662
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