Carbon dioxide stripping urea plant with a natural-circulation synthesis loop and a method for retrofitting such plant
AssigneeUrea Casale S.A.
InventorLorenzo Pennino
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Abstract
A plant for synthesis of urea with a CO2-stripping process, comprising a natural-circulation synthesis loop, said loop including at least a urea reactor (1), a carbon dioxide stripper (2) and a condenser (3), said reactor, stripper and condenser operating substantially at the same elevated pressure, said loop comprising also a reactor effluent flow line (5), connecting said urea reactor to said stripper, which comprises means (15) for directly or indirectly detecting the flow rate and/or the direction of the flow through said reactor effluent flow line (5).
Claims12
A plant for synthesis of urea with a carbon dioxide stripping process, comprising a natural-circulation synthesis loop, said loop including at least a urea reactor, a stripper and a condenser, said reactor, stripper and condenser operating substantially at the same elevated pressure, said loop comprising also a reactor effluent flow line, connecting said urea reactor to said stripper, wherein:
- the plant comprises means for directly or indirectly detecting the flow rate and/or the direction of the flow in said reactor effluent flow line.
A method for retrofitting a CO2-stripping urea plant, said plant comprising a natural-circulation synthesis loop, said loop including at least a urea reactor, a carbon dioxide stripper and a condenser, said reactor, stripper and condenser operating substantially at the same elevated pressure, said loop comprising also a reactor effluent flow line (5), connecting said urea reactor to said stripper, wherein:
- the addition of means for directly or indirectly detecting the flow rate and/or the direction of the flow in said reactor effluent flow line.
Dependencies are inferred from the claim text.