| 摘要 |
A process for production of hydrogen and/or carbon monoxide rich gas from gaseous or liquid hydrocarbon feed-stock comprising the following steps: (a) desulphurisation of the hydrocarbon feed ( 1 ), mixing the feed ( 1 ) with steam ( 4 ) produced from waste heat in the process, feeding the mixture ( 6, 7 ) to a steam reforming section ( 8, 9 ) for conversion of the hydrocarbon feed by reaction with steam to form a process gas ( 12 ) comprising a mixture of hydrogen, carbon monoxide, carbon dioxide, residual methane and excess steam, (b) cooling the process gas ( 12 ) by steam production, (c) separating hydrogen and/or carbon monoxide ( 21 ) by conducting the process gas through a hydrogen and/or carbon monoxide purification section ( 20 ), (d) adding essentially all off-gas ( 22 ) from the purification section ( 20 ) as fuel to the reforming section ( 8, 9 ) to provide heat for the reforming reaction, (e) recovering hot flue gas ( 32 ) from the reforming section and cooling the hot flue gas at least partly by steam production, (f) recovering essentially all steam produced by cooling of process gas ( 12 ) and flue gas ( 32 ) as process steam ( 4 ), wherein the reforming section comprises at least two reforming reactors ( 8, 9 ) fed in parallel with the feed mixture of hydrocarbon feedstock ( 6, 7 ) and steam ( 4 ) and fired so that fuel ( 25, 26 ) is added in parallel to burners ( 29, 31 ) in the reforming reactors ( 8, 9 ), whereas combustion air ( 27 ) is added to a first reforming reactor ( 8 ) in an amount required to ensure a suitable adiabatic flame temperature and the partly cooled flue gas ( 30 ) from the first reforming reactor is used as combustion air in the at least one subsequent reforming reactor ( 9 ) arranged in series with respect to said combustion air in an amount required to ensure a suitable adiabatic flame temperature
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