Abstract: This paper presents five typical design types ofleanrichcarbonate exchanger for EO/EG plant covering segmental baffle fixed tubesheet exchanger, segmental bafflefloating head exchanger, segmental baffle Utube exchanger, rod baffle exchanger and allwelded plate exchanger. It analyzes and compares the performance characteristics of each type of heat exchanger, the characteristics of applicable process fluids, and the differences in plant's occupation of land, equipment cleaning and cost and so forth. Then, according to the merits and demerits of each type selection scheme, the paper presents the sequence of recommended selection schemes, which provides reference for the selection of leanrich carbonate exchangers of similar devices.

Key words: lean-richcarbonate exchanger, type selection scheme, EO/EG plant