METHOD OF UTILISING SOUR GASES, CONTAINING HYDROGEN SULPHIDE AND AMMONIA Russian patent published in 2015 - IPC C01B17/04 B01D53/34 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical and oil refining industry. Method of utilising sour gases, containing H₂S and NH₃, with obtaining sulphur, includes processing H₂S-containing sour gases by Claus method with after-purification of Claus tail gases and combustion of NH₃-containing sour gas on installation for H₂SO₄ production. Process is carried out with application of two reaction three-chambered furnaces of cyclone type, one of which is installed on Claus thermal step, and the other - on installation for H₂SO₄ production. Produced H₂SO₄ circulates on installation for H₂SO₄ production, with its excess being burnt in reaction furnace of Claus thermal step, where H₂S-containing sour gas is supplied. Waste gases from thermal step are supplied to Claus catalytic step, tail gases from which are supplied for combustion in reaction furnace of installation for H₂SO₄ production, where NH₃-containing sour gas is supplied. Quantity of air, supplied into reaction furnace of Claus thermal step, is determined by air, required for thermal H₂SO₄ dissociation and H₂S oxidation, and regulated, taking into account oxygen, released in thermal dissociation. Heat from combustion of NH₃-containing sour gases is used in after-purification of Claus tail gases.

EFFECT: invention makes it possible to reduce installation dimensions, reduce quantity of air, supplied to Claus installation by 6-8% (by O₂ balance) and increase general efficiency of H₂S-containing gas conversion into sulphur to 99,95%.

3 cl, 1 dwg, 1 ex