FIELD: process engineering.
SUBSTANCE: invention can be used in chemical and petrochemical industries. Reducing mix produced on mixing water steam with carbamide solution is fed into high-temperature zone of flue gases with temperature of 700-1200°C. Simultaneously, reducing mix produced by mixing water steam with hydrogen peroxide is fed in at least one low-temperature zone of flue gases with temperature of 200-700°C. Reducing mixes are produced with hydrogen peroxide-to-carbamide weight ratio making 0.1-10. Preferable, reducing mix produced by mixing water steam with hydrogen peroxide water solution is fed into low-temperature zone and, additionally, by mixing it with water solution of carbamide.
EFFECT: higher degree of purification and stability, ruling out of secondary contaminant, ammonia, formation.
6 cl, 1 dwg, 3 tbl, 3 ex
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