| 摘要 |
A process for combusting a sulphur-bearing fuel is disclosed. A mixture of the fuel, a sulphur binding material and a sulphur retaining material is introduced into a first combustion zone. The mixture is combusted in the first zone under conditions of fuel-rich stoichiometry and temperature wherein substantially all of the sulphur is captured in a solid form by the sulphur binding material. The resulting captured sulphur compounds are then physically and/or chemically bound within or with the retaining material. Combustion products are thereby produced which include fuel-rich gases and solid flyash and slag containing mixtures of the captured sulphur and the binding and retaining materials. These combustion products are then further combusted in at least one additional fuel-rich combustion zone at temperatures above the fusion temperature of the solids, to melt the solids and to form complex, refractory mixtures and compounds containing the captured sulphur. Sodium and chlorine present in the fuel may also advantageously be captured and retained by the above process.
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