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AssigneeStamicarbon B.V.
InventorAlexander Aleida Antonius Scheerder
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The present application relates to a method of manufacturing a tube sheet (7) and heat exchanger assembly for a pool reactor or pool condenser for use in the production of urea from ammonia and carbon dioxide, wherein the method comprises manufacturing of the tube sheet (7) from a carbon steel material grade and providing said tube sheet (7) with corrosion protective layers (8, 9) of an austenitic- ferritic duplex stainless steel grade, wherein the heat exchanger comprises at least one U-shaped tube (13) of an austenitic-ferritic duplex stainless steel grade, the method further comprises inserting at least two sleeves (11) of an austenitic-ferritic duplex stainless steel grade through the tube sheet (7) such that both ends of the sleeve (11) extend in a direction away from the tube sheet (7), the method further comprises connecting the sleeves (11), at least the opposing ends thereof, to at least the protective layers (8,9) of the tube sheet (7) and finally, connecting both ends of the at least one U-shaped tube (13) to the respective sleeves (11).
Method for manufacturing a tube sheet and heat exchanger assembly for a shell and tube type heat exchanger, for use in an apparatus for the production of urea from ammonia and carbon dioxide, wherein the method comprises:
Tube sheet and heat exchanger assembly for a shell and tube type pool reactor or pool condenser configured to exchange heat between a first process medium received in a shell side of the reactor or condenser to a second process medium received in a heat exchanger extending through the tube sheet and extending at least partly in the shell side of the reactor or condenser, the assembly, wherein the tube sheet comprises a carbon steel material grade and is provided, on both sides thereof, with a corrosion protective layer of an austenitic-ferritic duplex stainless steel grade, wherein the heat exchanger comprises at least one U-shaped tube of an austenitic-ferritic duplex stainless steel grade, wherein at least two sleeves extend through the tube sheet, which sleeves, at least opposing ends thereof, are connected to the respective corrosion resistant protective layers and wherein the U-shaped tube, at least both ends thereof, are connected to the respective sleeve ends.
Dependencies are inferred from the claim text.