双椭圆锥段双场耦合破乳脱水装置分离特性及其结构优化

石油化工、油田开采等领域对油水乳化液进行破乳脱水处理是一个关键的工艺环节，旋流装置的双锥段结构对内部流场和分离效率的影响显著。针对锥段区域，提出了一种新型双场耦合分离装置，该装置锥段为椭圆相切型结构。建立了双场耦合分离装置的数值仿真模型，研究了椭圆相切式结构对装置内部流场和分离效率的影响。此外，为了提高新型装置的分离效率，通过建立不同结构参数下椭圆相切型装置计算模型，并结合Box-Behnken因子设计和响应面法对装置结构进行优化。结果表明：椭圆相切型结构的分离性能比传统结构更好，约提高了5.98%；新型结构优化后，椭圆1的长轴a₁、短轴b₁和椭圆2的长轴a₂的最佳取值分别为560、90和409.96 mm，在此条件下的双椭圆锥段双场耦合装置的脱水率约为96.23%。

Separation Characteristics and Structure Optimization of Double Ellipsoid Cone Double-Field Coupling Demulsifier

Demulsification and dewatering of oil-water emulsion is a key process in the fields of petrochemical industry and oilfield exploitation. The swirl device has a great influence on the internal flow field and separation efficiency. In this study, a new coupling device was proposed, of which the cone section was an ellipse tangent structure instead of the design mode of straight double-cone section. A model for numerical simulation of the device was established, and the influence of the elliptic tangent structure on the internal flow field and separation efficiency of the device was studied. Moreover, a calculation model of the elliptic tangential device with different structural parameters was also established, and the structure of the elliptic tangential swirl device was optimized by Box-Behnken factor design and response surface method. The results show that the separation efficiency of the elliptical tangent structure is higher by about 5.98% than that of the straight double-cone structure. After optimization, the optimal values of major axis a₁, minor axis b₁ of ellipse 1, and major axis a₂ of ellipse 2 are 560, 90 and 409.96 mm, respectively, and the corresponding dewatering rate is about 96.23%.