Energy-saving technology for low-tonnage hydrogen production
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Process Description Feedstock – hydrocarbon gas is fed into the adsorption desulfurization unit 1 and purified from sulfur compounds. Regeneration gas is discharged as fuel into the combustion chamber of the gas turbine unit 7. The treated feed gas, after mixing with demineralized water from the water treatment unit 2, is sent as a refrigerant to converter 3 and then as a feed mixture to heater 4 and catalytic reformer 5, from which the produced synthesis gas is fed to the carbon monoxide converter 3, from which the HCG is sent to the hydrogen extraction unit 6. In unit 6, the HCG is split into hydrogen, water condensate supplied to unit 2, and off-gas. The latter , together with the regeneration gas and compressed air , is fed to combustion chamber 7. Compressed air is supplied from the compressor of the gas turbine unit 8, combustion products are supplied from the combustion chamber 7 as a heat transfer medium to the reformer 5, then as a working fluid to the turbine 9, the spent gas is cooled in the heater 4 and discharged. Electricity from the generator 10 is used to power the drives of the process stream feeders. Balance water is supplied to unit 2 to compensate for water flow rate.
Process features
Steam reforming of feed gas in a convection-type reactor with the use of the heat of combustion products
Isothermal CO reforming reactor with removal of reaction heat by evaporation of the raw mixture
Deep heat recovery of process streams, no generation of water vapor on the side