关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">INPLANT软件, 加氢装置, 气液两相流, 流型, 管径, 气液比, 流体负荷, 管道倾斜角

Abstract: Based on a diesel hydrocracking unit in a Middle Eastern oil refinery as the research object, INPLANT software was used to conduct hydraulic calculations on the two-phase flow pipeline of the reaction system. The effects of pipeline diameter, gas-liquid ratio, and fluid load on the transition of two-phase flow patterns in horizontal pipelines were analyzed. The results show that by increasing the gas-liquid ratio of the fluid, the unstable slug flow can be transformed into a stable flow pattern, annular flow; changing the pipe diameter and fluid load cannot transform the two-phase flow pattern of the pipeline studied in this paper from slug flow to annular flow; when the liquid phase flow velocity is reduced to a sufficiently low level, the flow pattern can be transformed into wavy flow. The calculation results were used to guide the operational adjustment of the unit, increasing the gas-liquid ratio of the fluid, eliminating the pressure fluctuations in the reaction system, indicating that the flow pattern transition trend simulated by the software is close to actual production, with high accuracy.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">INPLANT software, hydrocracking unit, gas-liquid two-phase flow, flow pattern, pipe diameter, gas-liquid ratio, fluid load, pipeline inclination angle