METHOD FOR PHYSICOCHEMICAL TREATMENT OF SMOKE GAS AND LINE FOR UTILISATION OF CARBON DIOXIDE, HEAT AND DUST OF SMOKE GAS Russian patent published in 2009 - IPC B01D53/62 B01D53/74 

FIELD: technological processes.

SUBSTANCE: smoke gas from rotary furnace 1 is sent to dust-settling plant 2, which contains casing, dust-supply 4 and dust-discharge 7 nozzles and screen 5 installed at an angle with the possibility of vibration opposite to dust-supply nozzle 4. In top part 3 of casing, sand feeder-spreader 6 is installed, and in bottom part - device for unloading of prepared sand-lime mixture 8. Partially cooled and purified smoke gas is discharged through discharge nozzle 7 and supplied to cyclone 9 and electrostatic purifier 10. Dust separated from smoke gas in cyclone 9 and electrostatic purifier 10, and sand-lime mixture from dust-settling plant 2 with the help of plant 11 is sent to mixer 12 for preparation of dry building mortar. Water-locked building mortar is prepared in device 15 and sent to plant for production of construction materials, for instance, to granulator or plant for manufacture of wall construction blocks 23. Prepared construction materials are dried in drying-carbonising plant equipped with pipeline 22 for supply of smoke gas from electrostatic cleaner with the help of smoke exhaust 21. For drying of granules drying-carbonising column is used. For drying of wall blocks slot or tunnel plant 24 is used. Cleaned and cooled smoke gas is exhausted to atmosphere through nozzle 20.

EFFECT: higher ecological compatibility of lime or cement production, expansion of produced construction materials assortment, significant reduction of atmosphere pollution with carbon dioxide.

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