Patent ID: 11878957
Assignee: TOYO ENGINEERING CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC C

Claim 13:
14. The apparatus for urea production according to claim 13, comprising:
a purification apparatus configured to, by heating, at a pressure lower than the pressure in the high-pressure decomposer and higher than atmospheric pressure, the urea synthesis solution after being processed by the high-pressure decomposer to generate a gas phase and a liquid phase, and by separating the gas phase, obtain a urea synthesis solution having an increased urea concentration and generate a low-pressure steam condensate, a part of the low-pressure steam generated by the condenser being used as a heat source for heating the urea synthesis solution after being processed by the high-pressure decomposer;
a concentration apparatus configured to, by heating, at a pressure lower than the pressure in the purification apparatus and equal to or lower than the atmospheric pressure, the urea synthesis solution after being processed by the purification apparatus to generate a gas phase and a liquid phase, and by separating the gas phase, obtain a urea synthesis solution having a further increased urea concentration and generate a low-pressure steam condensate, another part of the low-pressure steam generated by the condenser being used as a heat source for heating the urea synthesis solution after being processed by the purification apparatus; and
a low-low-pressure fluid generating apparatus configured to, by reducing in pressure at least a part of the low-pressure steam condensate obtained from one or both of the purification apparatus and the concentration apparatus to a pressure equal to or higher than the atmospheric pressure, generate a low-low-pressure steam condensate and a low-low-pressure steam, wherein
the first heat exchange structure is configured to use the low-low-pressure steam condensate as the steam condensate having a temperature higher than 90° C.