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| 油田伴生气分级脱水性能研究 |
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张步超1,2,刘乃瑞1,2,张鑫1,2,侯璞明1,2,杨雅婷1,2,李雪纯1,2
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1.西北工业大学人机与环境工程实验室;2.西北工业大学动力与能源学院
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| 摘要: |
| 针对某油田伴生气处理站吸附塔的吸附容量小、脱水效率低和能耗高等问题,根据原装置的操作参数重新进行了脱水塔的设计计算,拟合了4A分子筛的等温吸附方程,以计算结果为依据在实验室建立了缩小版的吸附柱,并用COMSOL软件模拟了吸附柱吸附时的浓度云图。通过改变实验操作参数,结果表明:当温度和进气的绝对湿度降低,吸附柱出口干气的绝对湿度显著降低,穿透时间延长,证明模拟结果与实验结果吻合得较好。对比分析了4种吸附剂的吸附性能。通过改变吸附柱中吸附剂的类型和结构、减少进入分子筛的大直径水分子团以及提高吸附柱的分级脱水效率,在出口水露点满足规定的前提下,可使吸附剂成本节约9.53％,吸附柱的吸附容量提升34.10％。 |
| 关键词: 油田伴生气 分级脱水 脱水深度 吸附容量 穿透时间 COMSOL软件 |
| DOI：10.3969/j.issn.1007-3426.2021.04.002 |
| 分类号: |
| 基金项目:西北工业大学2020年度硕士研究生创意创新种子基金“天然气分级脱水性能研究”(CX2020134) |
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| Research on performance of graded dehydration of oilfield associated gas |
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Zhang Buchao1,2, Liu Nairui1,2, Zhang Xin1,2, Hou Puming1,2, Yang Yating1,2, Li Xuechun1,2
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1. Human-Machine and Environmental Engineering Laboratory, Northwestern Polytechnical University, Xi’an, Shaanxi, China;2. School of Power and Energy, Northwestern Polytechnical University, Xi’an, Shaanxi, China
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| Abstract: |
| Aiming at the problems of small adsorption capacity, low dehydration efficiency and high energy consumption of the adsorption tower of an oilfield associated gas processing station, the dehydration tower based on the operating parameters of the original device was designed and calculated, and the isotherm adsorption equation of 4A molecular sieve was fitted. Based on the calculation results, a reduced version of the adsorption column was established in the laboratory. The COMSOL software was used to simulate the concentration cloud diagram of the adsorption column during adsorption. By changing the experimental operating parameters, the results showed that when the temperature and the absolute humidity of the gas decreased, the absolute humidity of the dry gas at the outlet of the adsorption column was significantly reduced, and the breakthrough time was prolonged. It proved that the simulation and experimental results were in good agreement. The adsorption performance of four adsorbents were compared and analyzed. After changing the type and structure of the adsorbent in the adsorption column, reducing the large-diameter water molecular clusters entering the molecular sieve, and improving the graded dehydration efficiency of the adsorption column, on the premise of outlet water dew point meets the requirements, the adsorbents cost could be saved by 9.53%, and the adsorption capacity of the adsorption column could increase by 34.1%. |
| Key words: oilfield associated gas graded dehydration dehydration depth adsorption capacity breakthrough time COMSOL software |
