| 摘要 |
THE INVENTION RELATES TO AN INSTALLATION FOR THE PREPARATION OF UREA FROM AMMONIA AND CARBON DIOXIDE, THE INSTALLATION COMPRISING TWO REACTOR SECTIONS IN A VERTICALLY PLACED CONBINED REACTOR AND A HIGH-PRESSURE CONDENSER SECTION. THE INSTALLATION MAY COMPRISE A VERTICALLY PLACED COMBINED REACTOR, WITH THE TWO REACTOR SECTIONS BEING SEPARATED BY A HIGH-PRESSURE CONDENSOR SECTION. IN ANOTHER EMBODIMENT THE INSTALLATION COMPRISES A VERTICALLY PLACED CONBINED REACTOR THAT COMPRISES TWO REACTOR SECTIONS AND A HIGH-PRESSURE CONDENSER SECTION PLACED OUTSIDE THE REACTOR. THE INVENTION ALSO RELATES TO A PROCESS FOR THE PREPARATION OF UREA IN THIS INSTALLATION. THISINVOLVES FEEDING THE GAS STREAM LEAVING THE STRIPPER WHOLLY OR PARTLY TO THE HIGH-PRESSURE CONDENSER SECTION OF THE INSTALLATION. PREFERABLY, A PORTION OF THE GAS STREAM LEAVING THE SCRUBBER IS FED TO THE SECOND REACTOR SECTION IN THE VERTICALLY PLACED COMBINED REACTOR VIA AN AMMONIA-DRIVEN EJECTOR.
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