Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature
AssigneeUrea Casale S.A.
InventorsFederico Zardi, Paolo Silva
Life of this patent
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Abstract
A reactor for two-phase reaction, in particular for urea synthesis at high pressure and temperature of the type wherein a co-current flow of a gaseous phase and a liquid phase takes place, comprises a substantially cylindrical vertical external shell (2) in which is supported a plurality of superimposed horizontal perforated plates (6a-6e) in mutually spaced relationship and at least one opening (12a-12e) for liquid flow being defined in correspondence of each of the perforated plates. Advantageously the openings (12a-12e) for liquid flow are mutually offset so as to obtain a substantially zigzag preferential flow path for the liquid phase in the reactor.
Claims9
A urea reactor comprising:
- a substantially cylindrical vertical external shell (2),
- a plurality of superimposed perforated plates (6a-6e) extending horizontally and in mutually spaced relationship in said shell (2),
- wherein at least two of said adjacent perforated plates (6a-6e) are each divided into a plurality of perforated sectors (17) and unperforated sectors (18) side by side and in alternating manner, and
- at least one opening (12a-12e) for liquid flow being provided in each of said perforated plates (6a-6e), wherein the openings (12a-12e) for liquid flow of at least two adjacent perforated plates (6a-6e) are mutually offset to define a zigzag liquid flow path, and wherein said perforated sectors (17) and unperforated sectors (18) of said perforated plates (6a-6e) extend between an edge (19) of the perforated plates (6a-6e) adjacent to said opening (12a-12e) for liquid flow and an opposed edge (20) of the perforated plates (6a-6e) adjacent to an internal wall (9) of said shell (2), the perforated sectors (17) defining corresponding flowpaths for a gaseous phase and the unperforated sectors (18) defining a plurality of corresponding zigzag flowpaths for said liquid flow.
Dependencies are inferred from the claim text.