Method for Modernising a processing plant of high pressure melamine

摘要

A processing plant of melamine High Pressure which comprises a Section of a Section of Synthesis and purification of melamineIn the section of Synthesis provides a First current which contains melamine, and the purification Section comprises an annealing Lehr (2),That receives the first current containing melamine (6) from the synthesis section; a Stirrer (3),The Second That Feeds a Stream containing melamine (7) from the annealing Lehr (2),It is collected and Purified (11) melamine extracted vapors (10); a Heat exchanger (12), which condenses the vapors (10),It allows to obtain a Condensed Stream (14), an absorber (4), which feeds the Condensed Stream (14), which allows to obtain a aqueous solution (15),Comprising Ammonia and Carbon Dioxide, Aqueous solution of which is exported at least a fraction (15b) from the section of purification (200) of the plant.