Method of cooling partial oxidation gas containing finely divided impurities and used for combustion in a combined gas-steam turbine of a power plant
US4697413A · kind A · utility
Inventor
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of cooling partial oxidation gas entraining finely divided impurities employs nitrogen obtained as a by-product in a low temperature air decomposing plant delivering oxygen into a gasifier where a fuel is partially oxidized at a temperature above slag melting point. Crude gas exiting from the gasifier is quenched by the admixture of nitrogen to a temperature immediately below the fusing of softening point of dust particles entrained in the crude gas. Then the mixture is indirectly cooled in a waste heat boiler and subsequently additionally cooled in a second gas quencher by the admixture of further nitrogen. Nitrogen remains admixed to the gas during subsequent separating and desulphurizing treatment and is also supplied in the combustion chamber of a gas turbine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.