As a new type of high⁃efficiency mixing equipment, static mixers are widely used in industrial production due to their good mixing effect and simple operation. In this paper, the SK type static mixer was introduced into the crude oil storage tank to solve the problem of uneven distribution of crude oil density. The three⁃dimensional incompressible flow field was numerically simulated by FLUENT. The Eulerian multiphase flow model was used to simulate the velocity field, concentration field, temperature field and pressure field of the fluid in the static mixer. The results show that: under the action of the spiral blades of the static mixer, the crude oil moves cyclically along the opposite direction of the blade and changes periodically. Through the cutting, shearing and rotating action of the crude oil, the oil is almost completely mixed at the exit,which shows that SK static mixer has better mixing effect and less pressure loss and can reduce the energy consumption cost.

The wormlike sealing ring is located in the sealed groove of Dn1160 type pressure sintering furnace, which is prone to tear and damage.This article uses the finite element analysis method to nonlinear contact analysis of wormlike ring. The Von Mises stress and contact stress of worm⁃shaped rings are numerically simulated by Ansys software, and the results are compared.The cracking failure characteristics and easy tearing positions of worm⁃shaped rings under different parameters and working conditions are obtained. At the same time, the research results of predecessors are consulted to further optimize ring sealing ability.Finally, the research results provide a new idea for the design and optimization of the same kind of seal ring.