METHODS FOR NEUTRALIZING DYESTUFF-SLUDGES AND WASTE PRODUCTS

摘要

Method for neutralizing dyestuff-sludges and/or waste products containing comminutable organic components, mainly resins, wherein the neutralization is performed by oxidizing pyrolysis in a system with mobile or fixed beds at a temperature of 300 to 800 DEG C, in course of pyrolysis, dwelling time of dyestuff-sludges and/or waste containing comminutable organic components, mainly resin, amounts to 20 to 50 sec, the amount of the medium used for pyrolysis containing 21 % oxygen reaches 3 to 5 m<3>/one kg solid substance. After having performed pyrolysis a waste with gaseous phase and solid phase is obtained, which are separated in a way known in itself, solid phase is recycled to the process of dyestuff-manufacturing, while the gaseous phase is led directly through a reactor working with a method of thermic or catalytic oxidation or with a combination thereof. Thereafter it is led into the atmosphere or substances being harmful for the enrivonment are recovered in an absorbent wash-system or in an absorbent column, following recovery gaseous media left behind are led through a reactor using a method of thermic or catalytic oxidation or the combination thereof, wherefrom they are led into the atmosphere.