METHOD AND THE INSTALLATION FOR PREPARATION OF THE SOLUTION OF CARBAMIDE Russian patent published in 2006 - IPC B01F1/00 C07C273/16 B01F13/02 B01D53/74 

FIELD: chemical industry; methods and devices for production of carbamide solution.

SUBSTANCE: the invention is pertaining to chemical industry, in particular, to the method and the installation for preparation of the carbamide solution applied as the agent for purification of nitrogen oxides from the exhaust gases of the combustion engines. The method of preparation of the carbamide solution provides for the dilution with the desalted water up to the necessary solution strength of the carbamide formed in its production process, desorption of the dissolved gases from the solution at its air blasting and the subsequent absorption of the impurities from the air by the solid adsorbent. If necessary the solution may be added with the agent to lower its freezing temperature. The installation for realization of the method consists of: the container of the source solution of the carbamide, the apparatus with the stirring device, the desorber, the adsorber, the means for feeding of the carbamide solution from the container of the source solution of carbamide into the apparatus with the stirring device, the means for feeding of the desalted water into the apparatus with the stirring device, the means for feeding of the carbamide solution from the apparatus with the stirring device into the desorber, the means for feeding of the air from the desorber into the adsorber, a means for feeding of the air into the desorber, the means for feeding of the air from the desorber into the adsorber. The technical result of the invention is development of the method and creation of the installation for preparation of the carbamide solution meeting the specification requirements for purification of nitrogen oxides from the exhaust gases of the combustion engines.

EFFECT: the invention ensures development of the method and creation of the installation for preparation of the carbamide solution meeting the specification requirements for purification of nitrogen oxides from the exhaust gases of the combustion engines.

4 cl, 1 dwg