METHOD OF CONTROLLING PROCESS OF REDUCING SULPHUROUS FLUE GASES Russian patent published in 2014 - IPC C01B17/04 G05D27/00 

FIELD: chemistry.

SUBSTANCE: method of controlling the process of reducing sulphurous flue gases with natural gas in the presence additional oxygen, involving treatment of flue gases to obtain sulphur in a thermal step and at least one catalytic step, involves controlling the flow rate of natural gas and total flow rate of oxygen into the thermal step based on a preset empirical functional relationship between concentration values of components of the tail gas, flow rate of components of the flue gas and temperature in the thermal reactor chamber. To this end, the method involves measuring the current temperature in the thermal reactor chamber, determining volume flow rate of O₂ and N₂ in the flue gas and concentration of H₂S, COS and SO₂ in the tail gas and calculating compensation factors, based on which the flow rate of natural gas and oxygen into the thermal step is adjusted simultaneously. Flow rate of oxygen is defined as the difference between the calculated total flow rate of oxygen and the flow rate of oxygen coming in with the flue gas.

EFFECT: improved method.

1 dwg, 2 tbl