基于遗传算法的醇烃分离器聚结板结构优化

Structural Optimization of Coalescing Plate in Alcohol-hydrocarbon Separator Based on Genetic Algorithm

李彬 胡凯 盛春光 向粟林 吴巍 臧毅华 卫晓鑫

LI Bin HU Kai SHENG Chunguang XIANG Sulin WU Wei ZANG Yihua WEI Xiaoxin

西南石油大学石油与天然气工程学院，四川成都　610500 中海油天津化工研究设计院有限公司，天津　300131 中国石油天然气管道工程有限公司，河北廊坊　065000

Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China CNOOC Tianjin Chemical Research & Design Institute Co. Ltd., Tianjin 300131, China China National Petroleum Pipeline Engineering Co. Ltd., Langfang, Hebei 065000, China

海上乙二醇再生脱盐装置中的醇烃分离器尺寸较大且分离效率较低，导致分离器筒体增大且投资增加。该文通过对乙二醇富液与凝析油的聚结分离段进行优化设计来提升聚结分离效率并减小装置尺寸。采用Fluent软件分析研究了不同流速条件下波纹聚结板板间距、波长、振幅、倾角对其分离效率的影响，运用响应曲面法中的Box-Behnken Design（BBD）实验方法设计试验方案并建立聚结板分离效率与各影响参数间的响应模型。结果表明聚结板的出口油相浓度随聚结板板间距增大而增大；分离效率随着波长和振幅的增大而增大，随倾角的增大呈现先增大后减小。基于此，该文采用遗传算法优化聚结分离段来提升单位体积的分离效率，使得聚结段体积减少了19.06%，同时有效减小了醇烃分离器的尺寸。

The alcohol hydrocarbon separator in the offshore ethylene glycol regeneration desalination unit is large in size and low in separation efficiency, which leads to the increase of separator barrel and investment. In this paper, the coalescence separation section of ethylene glycol rich liquid and condensate is optimized to improve the coalescence separation efficiency and reduce the size of the device. Firstly, the Fluent software is used to analyze the influence of the spacing, wavelength, amplitude and inclination of corrugated coalescing plates on their separation efficiency under different flow velocities. Then the Box Behnken Design (BBD) in response surface method is used to design the test scheme and establish the response model between the separation efficiency of coalescing plates and various influencing parameters. The results show that the concentration of oil phase at the outlet of the coalescer plate is proportionate to the increase of the distance between the coalescer plates; The separation efficiency also increases with the increase of wavelength and amplitude. Besides, with the increase of inclination, the separation efficiency first increases and then decreases. Based on this, the genetic algorithm is utilized to optimize the coalescence separation section to improve the separation efficiency per unit volume, which reduces the coalescence section volume by 19.06%, and effectively reduces the size of the alcohol hydrocarbon separator.

https://doi.org/10.3969/j.issn.1008-2336.2023.01.088