| 摘要 |
Crude gas from the gasification of solid fuels is cooled in a plurality of cooling steps. In this way, condensate is obtained having a temperature of at least 130 DEG C and a pressure of at least 4 bar. This condensate is flashed and the flash vapor thereby produced is burned. The flashed condensate is fed to a separating device from which a condensate phase consisting predominantly of water (gas liquor) is withdrawn. The gas liquor is cooled in direct contact with colder gas before it is used for the cooling of the crude gas. The heated water-vapour-containing cooling gas is fed for combustion. Generally, the gas liquor is cooled in direct contact with the colder gas to a temperature of about 30-90 DEG C. The cooling gas expediently consists primarily of one or more of the gases carbon dioxide, nitrogen, methane or carbon monoxide.
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