Patent ID: 7579502
Filing Date: 2009-08-25
Classification: B01D,C07C

Abstract:
1. An apparatus for synthesizing urea comprising: a synthesis reactor for reacting ammonia with carbon dioxide to obtain a urea synthesis solution containing urea, unreacted ammonia, unreacted carbon dioxide and water; a stripper for stripping the urea synthesis solution with use of at least a part of raw material carbon dioxide to separate a gas mixture containing the unreacted ammonia and the unreacted carbon dioxide; a vertical submerged condenser having a shell and tube structure for condensing the gas mixture in an absorbing medium on the shell side while cooling the gas mixture with a cooling medium passing through the tube side; and recycling means for recycling a liquid obtained from the vertical submerged condenser to the synthesis reactor, wherein the synthesis reactor is a horizontal type, and wherein piping for sending the urea synthesis solution from the synthesis reactor to the stripper runs substantially horizontally and/or upward.