Abstract: In oil conversion structure adjustment, refining companies can get more raw materials for light hydrocarbon processing by producing more catalytic liquefied petroleum gas (LPG). LPG desulfurization device is an important unit for light hydrocarbon processing and LPG desulfurization reaction separator is its key equipment. In recent years, with the development of large-scale unit, the design and development of LPG desulfurization reaction separator has become the focus of engineering design. This paper introduces the development and process characteristics of desulfurization reaction separator and proposesdeveloping micro-mixed reaction separator through process enhancement technology to reduce device volume. Meanwhile, it adopts the coupling technology of jet mixture-enhanced mass transfer and milk-breaking coalescence and modular design. Through the integration of desulfurization reaction, mass transfer and separation process, the desulfurization reaction separator has significant advantages in equipment volume and installation layout, which can adapt to the needs of large-scale device development. The paper compares and analyzes the design scheme of the three types of LPG desulfurization reaction separators. Through comprehensive comparison, the micro-mixed reaction separator occupies less space and has less equipment weight, which can meet the requirements of the expansion and revamp of the unit.

Key words: liquefied petroleum gas/LPG, desulfurization, large scale, reaction separator, transmission separation, process intensification, micro-mixed