| 摘要 |
PURPOSE: A DME(Dimethyl Ether) FPSO(Floating Production Storage and Offloading) is provided to cool DME from a room temperature to low temperatures such that the DME can be liquefied by using nitrogen as a refrigerant. CONSTITUTION: A DME FPSO(100) comprises a natural gas producing unit(200), an oxygen generating unit(400), a DME producing unit(300), a combustion unit(500), and a carbon dioxide processing unit(600). The natural gas producing unit collects mixture from a natural gas field(10) in the sea to produce natural gas. The oxygen generating unit separates oxygen and nitrogen from air to produce the oxygen and the nitrogen. The DME producing unit receives some of the natural gas from the natural gas producing unit and the oxygen from the oxygen generating unit to produce DME. The combustion unit receives and combusts some of the natural gas from the natural gas producing unit to produce energy used in the DME FPSO. The carbon dioxide processing unit liquefies carbon dioxide, contained in exhaust gas discharged from the combustion unit, by using some of the nitrogen produced in the oxygen generating unit. The carbon dioxide processing unit supplies the liquefied carbon dioxide to the natural gas field in the sea to increase the production of the natural gas. [Reference numerals] (10) Natural gas field; (200) Natural gas producing unit; (300) DME producing unit; (310) DME liquefying device; (320) DME storage tank; (400) Oxygen generating unit; (450) Nitrogen storage tank; (460) Nitrogen injection unit; (500) Combustion unit; (600) Carbon dioxide processing unit; (AA) Electricity demand place; (BB) N_2(ultralow temperature); (CC) Natural gas
|
