丝网除沫器分离性能及流动阻力实验研究

发布时间：2018-06-22 07:04

本文选题：丝网除沫器 + 实验研究　；参考：《天津大学》2015年硕士论文

【摘要】：丝网除沫器广泛应用于石油、化工以及天然气加工等行业,它将气体中的雾沫分离开,从而减少因雾沫夹带导致的返混以提高效率、改善操作,同时净化尾气,减少大气污染等。在各种类型的商业化气液分离器中,丝网除沫器由于其具有结构简单、体积小、分离效率高、阻力小、重量轻、安装操作及维修方便等特点,使之成为目前使用范围最广泛的气液分离器。然而,关于丝网除沫器的研究滞后,特别是实验研究不足,设计上主要依赖经验。本文自主设计并搭建了丝网除沫器分离特性及流动阻力实验系统,开展了丝网除沫器在常温常压下的空气-水体系中的分离效率与压降的实验研究,并根据实验结果建立了分离效率的数学模型及压降的计算关联式。实验中针对通常工业条件下的气速范围,系统地研究了丝网除沫器的分离效率和压降随除沫器床层厚度、丝网直径、比表面积以及气速等参数的变化规律,分析了上述参数对丝网除沫器的分离效率及压降的影响规律,进而提出了分离效率的数学模型及压降的计算关公式,并采用实验数据对模型参数进行了关联。实验结果分析表明:气速是影响分离效率及压降的最主要因素,压降随着气速的增大而增大,分离效率随着气速的增大呈现先增大后减小的趋势;相同的气速下,分离效率及压降会随着丝径的增大而减小;除沫器床层厚度对压降的影响表现为厚度愈薄,压降愈小,对分离效率的影响比较明显,厚度愈厚,分离效率愈大;比表面积是分离效率和压降的重要影响因素,在丝径和厚度都确定的情况下,比表面积的增大会使分离效率和压降增加;通过比较分离效率数学模型和压降计算关联式的计算结果与实验结果,发现计算值与实验结果具有较好的一致性。
[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.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.8

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