Patent FR-2952833-A1 (FR)
Title: Integration of a unit for the production of cast iron, a drying and adsorption unit and a cryogenic separation unit, comprises a first compressor unit, a pipe to pass compressed feed gas to first compressor, and a second compressor unit
Inventor: DUBETTIER-GRENIER RICHARD
IPC: B01D53/62
Filed: 2009-11-20
Abstract: The integration of a unit for the production of cast iron (1), a drying and adsorption unit (6) and a cryogenic separation unit (13), comprises a first unit for compressing a moist feed gas obtaining from the production unit of cast iron, a pipe to pass the compressed feed gas to the first compressor (2) to the drying and adsorption unit, a second unit for compressing a first gas obtained from the drying and adsorption unit, and a unit for passing a part of the first compressed gas by the second compressor (9) to the cryogenic separation unit. The integration of a unit for the production of cast iron (1), a drying and adsorption unit (6) and a cryogenic separation unit (13), comprises a first unit for compressing a moist feed gas obtaining from the production unit of cast iron, a pipe to pass the compressed feed gas to the first compressor (2) to the drying and adsorption unit, a second unit for compressing a first gas obtained from the drying and adsorption unit, a unit for passing a part of the first compressed gas by the second compressor (9) to the cryogenic separation unit, a unit to produce a gas rich in carbon dioxide of the cryogenic separation unit, a gas turbine (17), and a unit for sending a part of a second gas-depleted in carbon dioxide with respect to the first gas of the cryogenic separation unit to the gas turbine. The first gas is enriched with carbon dioxide and depleted of hydrogen and carbon monoxide with respect to the feed flow. The integration unit further comprises a unit for purifying the gas rich in carbon dioxide into hydrogen sulfide and/or carbon monoxide, a unit for liquefying the gas rich in carbon dioxide, and a unit for compressing the gas rich in carbon dioxide. The installation has a buffer capacity between the adsorption unit and the second compressor and/or between the cryogenic separation unit and the gas turbine. A unit is arranged for expanding or compressing the second gas of cryogenic separation unit in upstream of the gas turbine. The gas turbine is adapted to drive one of the compressors. The installation further comprises an exchanger and a unit for passing the first gas in downstream of the second compressor and the second gas to the exchanger for heating the second gas. A drying unit is present in downstream of the adsorption unit and upstream of the cryogenic separation unit for drying the first gas, and a unit is arranged for sending a part of the second gas heated in the exchanger to the drying unit. A unit is arranged for sending the part of the second gas used for gas turbine regeneration. A pipe is used to send a gas of the same composition as the feed gas for cast iron production unit directly to the gas turbine optionally after compression in the first compressor. A unit is arranged for adjusting the gas composition by adding a gas containing carbon dioxide. An independent claim is included for a process for integration of a unit for the production of cast iron, a drying and adsorption unit and a cryogenic separation unit.