High pressure carbamate condensation apparatus
AssigneeStamicarbon B.V.
InventorsRahul Patil, Lambertus Wilhelmus Gevers, Markus Theodorus Marie Michaël Wagemans
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Abstract
The disclosure pertains to a high pressure carbamate condensation apparatus for a urea plant, a urea plant, and a urea production method. The apparatus comprises a first U-shaped tube bundle arranged around a second U-shaped tube bundle.
Claims18
A high pressure carbamate condensation apparatus comprising a shell-and-tube heat exchanger comprising a shell and a first and a second horizontal U-shaped tube bundle each having an upper leg portion and a lower leg portion connected by a bend portion, a shell side space confined by the shell, a first fluid distributor arranged in the shell side space at a bottom section of the condensation apparatus for distributing a first high pressure gas stream into the shell side space, and an inlet and outlet for a MP urea-comprising stream,
- wherein the first U-shaped tube bundle is arranged around the second U-shaped tube bundle and the upper leg portion of the outer first U-shaped tube bundle is proximally connected to the inlet for the MP urea-comprising stream and the lower leg portion of the outer first U-shaped tube bundle is proximally connected to the outlet for the MP urea-comprising stream and wherein the inner second U-shaped tube bundle is configured for raising steam;
- wherein the outlet for the MP urea-comprising stream has a larger flow area than the inlet for the MP urea-comprising stream.
A urea production plant comprising a high pressure synthesis section comprising a HP stripper, a reaction zone, and a high pressure carbamate condensation apparatus, wherein the high pressure carbamate condensation apparatus comprises a shell-and-tube heat exchanger comprising a shell and a first and a second horizontal U-shaped tube bundle each having an upper leg portion and a lower leg portion connected by a bend portion, a shell side space confined by the shell, a first fluid distributor arranged in the shell side space at a bottom section of the condensation apparatus for distributing a first high pressure gas stream into the shell side space, and an inlet and outlet for a MP urea-comprising stream, wherein the first U-shaped tube bundle is arranged around the second U-shaped tube bundle and the upper leg portion of the outer first U-shaped tube bundle is proximally connected to the inlet for the MP urea-comprising stream and the lower leg portion of the outer first U-shaped tube bundle is proximally connected to the outlet for the MP urea-comprising stream and wherein the inner second U-shaped tube bundle is configured for raising steam,
- wherein the high pressure synthesis section, the reaction zone and/or the HP stripper, has a liquid flow connection for urea solution through an expansion device to said inlet for MP urea-comprising stream and to said upper leg portion of the outer first U-shaped tube bundle, wherein the stripper has a gas flow line connected to a gas inlet of the shell side of the condensation apparatus.
Dependencies are inferred from the claim text.