FIELD: chemical or physical processes.
SUBSTANCE: invention relates to apparatus for purifying sulphurous alkali wastes. Disclosed are two versions of installation, which includes two carbonisation columns, oxidation reactor, burner, separator, two heat exchangers, refrigerator and separation device. During operation of the first version of the installation, the sulphurous wastes are heated in the first heat exchanger, mixed with the flue gas supplied from the burner and separated in the separator into gas, which is fed into the lower portion of the first carbonisation tower, and a residue which is cooled in a first heat exchanger and fed into an upper portion of the first carbonisation column, where primary carbonisation of the effluents is carried out. Said blown-off gas is fed into waste air feed line or directly into burner whereto fuel is fed. Carbonated effluents are removed from the bottom of the first carbonization column, heated in the second heat exchanger and directed to the bottom of the reactor together with air. Oxidised effluents are removed from the top of the reactor, cooled in a second heat exchanger and separated into waste air and oxidised effluents, supplied for re-carbonisation into upper part of second carbonization column, in the lower part of which after cooling in cooling, remaining part of separation gas is supplied. Off-gas is discharged from the top of the second carbonization tower, and treated wastes are discharged from the bottom. Operation of the second version is characterized by supply of sulfur dioxide to burner instead of waste air, as well as air.
EFFECT: technical result is improved quality of cleaning sulphurous alkali wastes.
2 cl, 2 dwg
