FIELD: purification plants.
SUBSTANCE: invention relates to plants for the purification of sulfur-alkaline effluents. Two options of the plant are proposed, including in both options two carbonization columns, an oxidizing reactor with a cooling unit, a device with a submerged burner, a recuperative heat exchanger, three refrigerators and a separation device. During the operation of the plant in the first option, sulfur-alkaline effluents are fed to the first carbonation column, where light sulfur compounds are blown off with a part of the gas supplied from the separator. The resulting sulfur dioxide, together with the exhaust air and fuel, is fed into a burner equipped with a flue gas outlet line. Carbonized effluents are removed from the first carbonation column, heated in a recuperative heat exchanger, and sent together with air to the bottom of the reactor, where sulfur compounds are oxidized in the presence of a heterogeneous catalyst. The oxidized effluents are removed from the top of the reactor, cooled in the first refrigerator and separated in the separation device into exhaust air and oxidized effluents fed to the flue gas outlet line connected to the separator, from which the separation residue is removed, cooled in the recuperative heat exchanger, the second refrigerator and fed to the upper part of the second carbonation column, to the lower part of which, after cooling in the third refrigerator, the remaining part of the separation gas is fed. The exhaust gas is removed from the top of the second carbonation column, and the treated effluents are removed from the bottom. The operation of the second option is characterized by the supply of sulfur dioxide to the burner instead of exhaust air, as well as air.
EFFECT: technical result is a reagent-free and waste-free purification of sulfur-alkaline effluents by equipping the plant with a reactor with a heterogeneous oxidation catalyst, as well as a burner and a separator as a source of carbon dioxide.
2 cl, 2 dwg
