关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">三效蒸发结晶, 管道设计, 弯头防冲蚀, 液固两相流, 速度场, 压力场, 粒子运动轨迹, 冲蚀速率

Abstract: In the evaporation crystallization unit of wet flue gas desulfurization process, the medium inside the pipeline is mainly a liquid-solid two-phase fluid. Improper equipment layout and pipeline design can easily cause solid particle precipitation and deposition, resulting in certain erosion and wear on pipelines, elbows, etc. Starting from engineering practice, this article systematically reviews the layout and pipeline design of the main equipment of the evaporation crystallization system in a certain device. A fluid flow model (CFD) is used to simulate and analyze the erosion of elbows with different curvature radii that affect the long-term operation of the device. The distribution of fluid velocity field, pressure distribution, particle motion trajectory, and erosion rate inside the pipeline are studied. It is proved that using elbows with a curvature radius of 3D, 6D, and others can effectively reduce the erosion and wear of solid particles in the fluid on the pipeline, ensuring the long-term operation of the device.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">three-effect evaporation crystallization, pipeline design, elbow erosion prevention, liquid-solid two-phase flow, velocity field, pressure field, particle motion path, erosion rate