August 2019

Heat Transfer

Refinery revamp opportunities with welded plate heat exchangers

The plate-and-shell (P&S) heat exchanger has three significant advantages over the shell-and-tube (S&T) type traditionally used in refinery processes.

Kauders, P., CDE Projects Ltd.; Broad, R., GESMEX Exchangers GmbH

The plate-and-shell (P&S) heat exchanger has three significant advantages over the shell-and-tube (S&T) type traditionally used in refinery processes: (1) It is compact, (2) it is less likely to foul,1,2,3 and (3) it provides a true countercurrent solution, unlike the two-pass U-tube and floating head designs commonly used in refinery process designs. Owing to its laser-welded construction and its cylindrical shell enclosure, the P&S heat exchanger can be designed for the high pressures and temperatures that are needed for refinery processes, particularly hydrotreating. In a revamp situation, it is often possible to replace existing tube bundles with fewer plate packs by using ex

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