Numerical Simulation Study on Structural Selection of Hydrocyclone-Flotation Separation Equipment for Oily Wastewater
Authors: Bai Jianhua1, Jian Xiaowen2, He Yaqi3, Ma Jun3, Sun Chao3, Zhao Yu3
(1. CNOOC (China) Co., Ltd. Tianjin Branch, Tianjin 300452; 2. Shenzhen SINOKLE Technology Co., Ltd., Shenzhen 518000; 3. CNOOC (China) Co., Ltd. Tianjin Branch, Tianjin 300452)
Abstract: To clarify the performance characteristics of two commonly used integrated hydrocyclone-flotation oil-water separation units at home and abroad, CFD numerical simulation was employed. A reliable physical model was established, a refined discrete mesh was generated, and appropriate simulation methods were selected to study the single-phase flow field and the oil-gas-water three-phase separation efficiency. The results show that under optimal operating conditions, the cyclonic separation capability of the Type "2" separator is superior to that of Type "1". The separation efficiency of both separators increases with increasing dissolved-air water volume, split ratio and gas-dissolution ratio, with optimal values of 40%, 15% and 20% respectively.
Keywords: hydrocyclone; air flotation; separator; CFD; flow field; separation efficiency
