SYSTEM FOR THERMAL TREATMENT OF BIOLOGICAL WASTE WATER TREATMENT SLUDGE Russian patent published in 2024 - IPC C02F11/18 B09B3/40 

FIELD: performing operations.

SUBSTANCE: invention relates to thermal treatment of biological wastewater treatment sludge and can be used at treatment facilities of industrial and municipal enterprises. Proposed system comprises slime accumulator, centrifuge, excess active sludge accumulator, dehydrated sediment hopper, circulating fluidised bed furnace, ash collection hopper, ash separation and gas cleaning unit and stack. Centrifuge is connected with slime accumulator and accumulator of excess active sludge. Circulating fluidised bed furnace is connected to the slag collection hopper. System is equipped with sediment mixing hopper and extruder. Sediment mixing hopper is connected by inlet to slime accumulator and to accumulator of excess active sludge, and by outlet – to centrifuge. Extruder is connected by the inlet to the centrifuge, and by the outlet to the hopper of the dehydrated sediment. Extruder is equipped with a binder supply, and the circulating fluidised bed furnace is equipped with an inert material supply. Ash separation and gas cleaning unit is made in the form of a waste-heat boiler of flue gases removed from the circulating fluidised bed furnace, a steam turbine, an electric generator, connected in series to the gas flow a cyclone, a spraying adsorber, an active coal input device connected to an active coal storage hopper, a bag filter, as well as the flue gas recirculation flow into the circulating fluidised bed furnace and the flue ash, inert material and reaction products collection hopper. Slime accumulator is connected to the spraying adsorber through the suspension preparation hopper. Hopper for collection of flue ash, inert material and reaction products is connected to a waste heat boiler of flue gases, a cyclone, a spraying adsorber, a bag filter.

EFFECT: high energy efficiency of thermal recycling of biological waste water treatment sludge.

1 cl, 1 dwg