Abstract:
Objective Aiming at the phenomenon of uneven distribution or large accumulation of water in the transportation process of water-cut crude oil, the Kenics static mixer was introduced into the transportation process of water-cut oil, and the homogenization effect was analyzed.
Methods FLUENT software was used to simulate the flow field inside the pipeline, and the homogenization effect was evaluated by coefficient of variation and average droplet size. The effects of mixing unit arrangement, twist angle, aspect ratio, and quantity on the homogenization effect were analyzed.
Results The use of Kenics static mixers with staggered arrangement, twist angle of 240°, length to diameter ratio of 0.5, and number of 10 can not only achieve uniform distribution of the oil-water phase, but also achieve smaller average droplet size, thereby achieving better homogenization effect.
Conclusions The best homogenization effect was achieved when the arrangement method was opposite and staggered. With the increase of torsion angle, the variation coefficient at the pipeline outlet and the average droplet size show a downward trend. With the decrease of aspect ratio and the increase of quantity, the coefficient of variation values at the outlet tend to be the same, but smaller average droplet sizes can be obtained. After homogenization treatment, the samples can more accurately reflect the water content of the crude oil in the storage tank, avoid disputes over oil handover, and ensure the completion of the oil export task.
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