APPARATUS FOR OXIDISING SULPHUR DIOXIDE Russian patent published in 2014 - IPC C01B17/80 C01B17/765 

FIELD: chemistry.

SUBSTANCE: apparatus has an air blower (1), a furnace (7) for burning sulphur-containing material, an exhaust-heat boiler (6) with evaporation elements, a contact apparatus (3) with five catalyst beds, two steam superheaters (4), (5), a gas-air heat exchanger (2) and an economiser (8). The second steam superheater (5) is connected to the gas stream output after the second catalyst bed of the contact apparatus (3) and the input of the third catalyst bed. The input of the gas-air heat exchanger (2) is connected via a gas passage to the output of the third catalyst bed. The output of the fourth catalyst bed of the contact apparatus (3) is connected to a compressor. The output of the fifth catalyst bed is connected to the economiser (8). Water enters the economiser from a feed unit (9).

EFFECT: invention improves reliability of the apparatus and lowers content of hazardous compounds bound with nitrogen in exhaust gases.

1 dwg