| 摘要 |
<p>PURPOSE: To prevent leakage of a mixed gas from a shaft seal apparatus by reducing installing space of a compressor and power. CONSTITUTION: Ammonia and unreacted ammonium carbamate contained in urea synthesizing liquid from an urea synthesizing area are separated as ammonia, carbon dioxide and a mixed gas by carbon dioxide stripping and the pressure of the mixed gas is increased and the mixed gas is introduced into a condensation area in a mixed gas compressing part 4 of a centrifugal compressor constituting of carbon dioxide compressing part 5 and a mixed gas compressing part 4, providing the former impeller and latter impeller on a common shaft and having a structure blowing out the mixed gas to shaft seal apparatus and the produced condensate or gas-liquid mixture is circulated into the urea synthesizing area.</p> |
