CPC B01J 19/0013 (2013.01) [B01J 4/001 (2013.01); B01J 19/006 (2013.01); C07C 273/04 (2013.01); B01J 2208/00176 (2013.01); B01J 2208/00194 (2013.01); B01J 2208/00256 (2013.01); B01J 2219/00081 (2013.01)] | 18 Claims |
1. 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.
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