Floating liquefied-gas production facility

Patent metadata

Field	Value
Publication number	US-2016116209-A1
Application number	US-201414893638-A
Country	US
Kind code	A1
Filing date	Apr 7, 2014
Priority date	Apr 7, 2014
Publication date	Apr 28, 2016
Grant date	—

Abstract

This floating liquefied-gas production facility ( 1 ) is equipped with: a gas turbine unit ( 20 ); a liquefaction facility ( 90 ) that has a primary refrigeration compressor ( 40 ) driven by the gas turbine unit ( 20 ), and cools natural gas; a drum-circulation-type exhaust heat recovery boiler ( 30 ) that recovers the energy of exhaust heat from the gas turbine unit ( 20 ) as steam; a component separation system ( 85 ) that uses the steam generated by the drum-circulation-type exhaust heat recovery boiler ( 30 ) as a heat source to separate components in natural gas obtained from the ocean floor, and sends said components to the liquefaction facility ( 90 ); and a fuel gas supply device ( 100 ) that compresses end-flash gas and/or boil-off gas, and supplies said compressed gas to the gas turbine unit ( 20 ) as fuel.

First claim

1 . A floating liquefied-gas production facility comprising:
a gas turbine unit; a liquefaction device which has a primary refrigeration compressor driven by the gas turbine unit and is configured to cool natural gas; a drum circulation type exhaust heat recovery device configured to recover energy of exhaust heat of the gas turbine unit as steam; a component separation system configured to separate the components in the natural gas extracted from the ocean floor and send the components to the liquefaction device using the steam generated by the drum circulation type exhaust heat recovery device as a heat source; and a fuel gas supply device configured to compress at least one of an end-flash gas and a boil-off gas and supply it to the gas turbine unit as a fuel.

2 . The floating liquefied-gas production facility of claim 1 , wherein the drum circulation type exhaust heat recovery device is horizontally installed.

3 . The floating liquefied-gas production facility of claim 1 , wherein the component separation system comprises:
an acid gas removal device configured to remove an acid gas contained in the natural gas extracted from the ocean floor; an antifreeze recycling device configured to recover and recycle antifreeze added when the natural gas is extracted; and a fractionator configured to fractionate the natural gas, wherein the acid gas removal device, the antifreeze recycling device and the fractionator are configured to use the steam generated by the exhaust heat recovery device as a heat source.

4 . The floating liquefied-gas production facility of claim 3 , further comprising:
a steam turbine configured to be driven by the steam generated by the exhaust heat recovery device; and at least one of an auxiliary compressor and a main generator driven by the steam turbine, wherein the component separation system is configured to use the steam used in the steam turbine as a heat source.

5 . The floating liquefied-gas production facility of claim 4 , wherein the auxiliary compressor comprises:
a feed gas compressor configured to compress the natural gas supplied to the acid gas removal device, a stabilizer overhead compressor configured to compress a condensate gas, a natural gas booster compressor configured to supply the natural gas to the liquefaction device, and an end-flash gas compressor configured to compress the end-flash gas and the boil-off gas in the fuel gas supply device.

Assignees

• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Nagao Hideki
• Kobayashi Masahiro

Classifications

• F25J3/08

  Separating gaseous impurities from gases or gaseous mixtures {or from liquefied gases or liquefied gaseous mixtures}(cold traps B01D8/00) · CPC title

• F02C3/22

  the fuel or oxidant being gaseous at standard temperature and pressure (F02C3/28 takes precedence) · CPC title

• F02C7/22

  Fuel supply systems · CPC title

• B63B35/44

  Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices {(construction methods for floating offshore platforms B63B75/00)} · CPC title

• B63B2035/4473

  Floating structures supporting industrial plants, such as factories, refineries, or the like · CPC title