气-液顺流脱硫反应装置内流场的数值模拟

In order to explore the influence of blades angle on the flow field distribution and energy- consumption of desulfurization reactor, the desulfurization reaction device model was established and the flow field in the desulfurization reactor was numerical simulated using computational fluid dynamics software STAR - COM +. Three - dimensional desulfurization reactor model was established by using STAR-CCM+ software with the k-Epsilon turbulence model and the finite volume method was used to solve the incompressible flow in the reactor. By keeping the structure of the reaction device unchanged, the results of changing conditions were analyzed by only adjusting the installation angle of the blades. By observing the distribution of streamline,fluid velocity and turbulent kinetic energy,and regularities of pressure drop at the different blade installation angles( 30° ,35° ,40° ,45° ,50° ,55° ,and 60°) ,the influence of distribution of gas phase on desulfurization efficiency and energy consumption was analyzed. The results show that the maximum velocity occurs at the blades. The larger the angle,the more disordered the fluid,and the more sufficient the reaction between gas and desulfurization liquid. The disturbance degree in the reactor is ideal when the angle of blades is 603. The angle increases from 30' to 60,: ,and the fluid velocity through the blades increases from 16 m/s to 35 m/s. The increase of blades angle increases the maximum value of turbulent kinetic energy,but the distribu¬tion range of turbulent kinetic energy is ideal at 30°. The larger the blades angle,the larger the total pressure drop of the desulfurization re¬actor and the more energy consumption. The pressure drop is minimum at 30°,about 54% of the pressure drop at 60°, which is beneficial to energy saving and increasing economic benefits.