METHOD FOR VITRIFICATION OF SLUDGE OR OTHER ORGANIC SLUDGES AND WASTES AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC F23G5/27 C02F11/10 

FIELD: waste processing and disposal.

SUBSTANCE: invention relates to recycling organic wastes and slurries, in particular wastewater sludge, to obtain granulated vitrified slag for further use thereof. Method includes drying wastes before feeding into melting chamber, their loading into melting chamber, burning of organic components on surface of molten slag, obtained from mineral components of wastes in melting chamber, housing of which is cooled with heat carrier, utilization of heat of obtained gases and their purification. At that, dried sediment is supplied for pelletisation, after which accumulator is supplied to hopper, from which is supplied into melter in distributed manner to surface of slag melt, which is located at the bottom of the melter, wherein temperature in the melter volume should be not less than 1,200 °C and not over 1,600 °C without cooling of the housing of the melter by the heat carrier, liquid slag level is maintained inside the melter due to the mineral fraction of the raw material newly supplied to the melt surface, distributed blowing is made to the melter, inlet of oxidiser preheated by exhaust gas on heat exchangers, excess to stoichiometric ratio of oxidant / organic component of raw material, wherein excess over stoichiometric ratio of oxidant / organic component of raw material for complete oxidation of organic material should be 1.5–2 – for air, 1.1–1.3 – for oxygen (by weight), melt is drained from melter, exhaust gas is evacuated from melter volume through hole in melter by means of smoke removal system, at that, exit gas at outlet of afterburning zone is diluted with cold air to temperature of 1,000–1,100 °C, exhaust gas is supplied to cyclone NO reduction reactor, where it is mixed with a solution of urea and content of thermal nitrogen oxides is suppressed, after which the exhaust gas is supplied to the heat exchanger of the blast heating and to the waste heat boiler, after cooling in which the exhaust gas is supplied for gas cleaning.

EFFECT: technical result is reduction of wastes generated or accumulated as a result of operation of treatment facilities.

32 cl, 3 dwg