FIELD: process engineering.
SUBSTANCE: invention relates to methods aiming at purifying melamine production effluents. Proposed method comprises preliminary heat treatment of triazine contained in effluents. During said pretreatment, vapors are condensed from gas phase, while liquid phase is subjected, after said pretreatment, to thermal hydrolysis whereat NH3 is removed from obtained liquid phase containing H2O, CO3 and NH3. Invention covers also the device that comprises required process elements including thermal pretreatment plant with heat exchanger, vapor condenser, device for thermal hydrolysis, device to remove ammonia from liquid phase product at the stage of thermal hydrolysis.
EFFECT: continuous, safe and efficient treatment of effluents of melamine production.
21 cl, 2 ex, 1 tbl
