本文選題：絲網(wǎng)除沫器 + 實(shí)驗(yàn)研究　； 參考：《天津大學(xué)》2015年碩士論文

【摘要】：絲網(wǎng)除沫器廣泛應(yīng)用于石油、化工以及天然氣加工等行業(yè),它將氣體中的霧沫分離開,從而減少因霧沫夾帶導(dǎo)致的返混以提高效率、改善操作,同時(shí)凈化尾氣,減少大氣污染等。在各種類型的商業(yè)化氣液分離器中,絲網(wǎng)除沫器由于其具有結(jié)構(gòu)簡單、體積小、分離效率高、阻力小、重量輕、安裝操作及維修方便等特點(diǎn),使之成為目前使用范圍最廣泛的氣液分離器。然而,關(guān)于絲網(wǎng)除沫器的研究滯后,特別是實(shí)驗(yàn)研究不足,設(shè)計(jì)上主要依賴經(jīng)驗(yàn)。本文自主設(shè)計(jì)并搭建了絲網(wǎng)除沫器分離特性及流動(dòng)阻力實(shí)驗(yàn)系統(tǒng),開展了絲網(wǎng)除沫器在常溫常壓下的空氣-水體系中的分離效率與壓降的實(shí)驗(yàn)研究,并根據(jù)實(shí)驗(yàn)結(jié)果建立了分離效率的數(shù)學(xué)模型及壓降的計(jì)算關(guān)聯(lián)式。實(shí)驗(yàn)中針對(duì)通常工業(yè)條件下的氣速范圍,系統(tǒng)地研究了絲網(wǎng)除沫器的分離效率和壓降隨除沫器床層厚度、絲網(wǎng)直徑、比表面積以及氣速等參數(shù)的變化規(guī)律,分析了上述參數(shù)對(duì)絲網(wǎng)除沫器的分離效率及壓降的影響規(guī)律,進(jìn)而提出了分離效率的數(shù)學(xué)模型及壓降的計(jì)算關(guān)公式,并采用實(shí)驗(yàn)數(shù)據(jù)對(duì)模型參數(shù)進(jìn)行了關(guān)聯(lián)。實(shí)驗(yàn)結(jié)果分析表明:氣速是影響分離效率及壓降的最主要因素,壓降隨著氣速的增大而增大,分離效率隨著氣速的增大呈現(xiàn)先增大后減小的趨勢(shì);相同的氣速下,分離效率及壓降會(huì)隨著絲徑的增大而減小;除沫器床層厚度對(duì)壓降的影響表現(xiàn)為厚度愈薄,壓降愈小,對(duì)分離效率的影響比較明顯,厚度愈厚,分離效率愈大;比表面積是分離效率和壓降的重要影響因素,在絲徑和厚度都確定的情況下,比表面積的增大會(huì)使分離效率和壓降增加;通過比較分離效率數(shù)學(xué)模型和壓降計(jì)算關(guān)聯(lián)式的計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果,發(fā)現(xiàn)計(jì)算值與實(shí)驗(yàn)結(jié)果具有較好的一致性。
[Abstract]:The wire mesh defroster is widely used in petroleum, chemical and natural gas processing industries. It separates the foam from the gas, thus reducing the backmixing caused by the entrainment of the mist to improve efficiency, operation and purification of tail gas. Reduce air pollution, etc. In various types of commercial gas-liquid separators, the wire mesh defroster has the characteristics of simple structure, small volume, high separation efficiency, small resistance, light weight, convenient installation, operation and maintenance, etc. It has become the most widely used gas-liquid separator. However, the research of screen defoaming device is lagging behind, especially the experimental research is insufficient, and the design mainly depends on experience. In this paper, the separation characteristics and flow resistance experiment system of the screen defoaming device is designed and built, and the separation efficiency and pressure drop of the screen defoaming device in the air-water system at room temperature and atmospheric pressure are studied. Based on the experimental results, the mathematical model of separation efficiency and the correlation of pressure drop are established. In the experiment, the separation efficiency and pressure drop of the screen defroster with the parameters of bed thickness, wire mesh diameter, specific surface area and gas velocity are systematically studied in view of the gas velocity range under normal industrial conditions. The influence of the above parameters on the separation efficiency and pressure drop of the screen defroster is analyzed. The mathematical model of the separation efficiency and the formula for calculating the pressure drop are put forward, and the model parameters are correlated with the experimental data. The experimental results show that the gas velocity is the most important factor affecting the separation efficiency and pressure drop. The pressure drop increases with the increase of the gas velocity, and the separation efficiency increases first and then decreases with the increase of the gas velocity. Separation efficiency and pressure drop will decrease with the increase of wire diameter, the effect of bed thickness on pressure drop is that the thinner the thickness and the smaller the pressure drop, the more obvious the effect on separation efficiency is, and the thicker the thickness, the greater the separation efficiency. The specific surface area is an important factor of separation efficiency and pressure drop. When the wire diameter and thickness are determined, the increase of specific surface area will increase the separation efficiency and pressure drop. By comparing the calculation results of the mathematical model of separation efficiency and the correlation formula of pressure drop calculation with the experimental results, it is found that the calculated values are in good agreement with the experimental results.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ051.8

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本文編號(hào)：2052022