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在空分装置中采用板翅式热虹吸蒸发器以替代运转机械——液氧泵,使液氧流经吸附器实现清除乙炔等碳氢化合物有害杂质,它是一项先进的防爆措施。本文介绍一个用于工业生产的液氧自循环吸附的流程及试验结果。文中重点论述液氧在垂直板翅槽道中两相流压力降及传热的计算模型与程序。建立在对窄缝矩形槽道中局部压力降与传热关系式逐步积分基础上的计算结果与试验数据比较已获得较满意结果。试验还提供了液氧在吸附器,过滤器及管路系统中压力损失的经验公式。证明正在完善中的液氧自循吸附技术可推广用于工业生产。
It is an advanced explosion-proof measure that the plate-fin thermosyphon evaporator is used in the air separation unit to replace the running mechanical-liquid oxygen pump to make the liquid oxygen flow through the adsorber to remove the harmful impurities such as acetylene and other hydrocarbons. This article describes a process for the production of liquid oxygen self-cycle adsorption process and test results. This paper focuses on the calculation model and program of the pressure drop and heat transfer of liquid oxygen in a vertical plate-fin channel. The calculation results based on the step-by-step integration of local pressure drop and heat transfer in a narrow rectangular slot have been compared with the experimental data and satisfactory results have been obtained. The experiment also provided an empirical formula for the pressure loss of liquid oxygen in adsorbers, filters and piping systems. Proved that the liquid oxygen in the process of self-absorption adsorption technology can be extended for industrial production.