System for utilizing carbon dioxide of flue gas captured by cold heat of liquefied natural gas

Patent metadata

Field	Value
Publication number	US-11137203-B2
Application number	US-201816009171-A
Country	US
Kind code	B2
Filing date	Jun 14, 2018
Priority date	Sep 5, 2017
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

A system captures carbon dioxide from a flue gas of a power generation facility by using cold heat of liquefied natural gas and utilizes the captured carbon dioxide for mining natural gas, using heat of the flue gas to regasify the LNG. Solidified dry ice is captured from gaseous carbon dioxide contained in the flue gas, and the captured dry ice is used as filler when mining natural gas. The system includes a mining facility, a vehicle to transport LNG liquefied by the mining facility; and a facility for regasifying the transported LNG and capturing dry ice from the carbon dioxide. In the regasification and capture facility, the flue gas exchanges heat with the LNG, thereby regasifying the LNG at an increased temperature and capturing the dry ice from the carbon dioxide. The captured dry ice is transported to the mining facility, which uses it for mining the natural gas.

First claim

What is claimed is:

1. A system for utilizing carbon dioxide of a flue gas captured by cold heat of liquefied natural gas (LNG), the system comprising:
a power generator configured to generate electricity and produce the flue gas;
a mining apparatus for mining natural gas, the mining apparatus configured to drill in an oil field from which the natural gas is extracted and to replace the extracted natural gas by injecting a filler into the oil field;
a transportation vehicle for transporting the LNG obtained by liquefying the natural gas mined by the mining facility; and
a regasification and capture apparatus configured to regasify the LNG transported by the transportation vehicle and to capture dry ice from the carbon dioxide of the flue gas by receiving the flue gas from the power generator and perform a heat exchange between the LNG transported by the transportation vehicle and the flue gas produced by the power generator,
wherein the power generator generates the electricity by using the natural gas obtained by regasifying the LNG in the regasification and capture apparatus,
wherein, in the regasification and capture apparatus, the flue gas produced in the power generator exchanges heat with the LNG such that the LNG is regasified at an increased temperature and such that the dry ice is captured from the carbon dioxide contained in the flue gas,
wherein the transportation vehicle transports the captured dry ice to the mining apparatus, and
wherein the mining apparatus injects the carbon dioxide, as the filler, that forms the dry ice transported by the transportation vehicle to mine the natural gas.

2. The system of claim 1 , further comprising:
an LNG storage configured to store the LNG transported by the transportation vehicle,
wherein the LNG stored in the LNG storage is supplied to the regasification and capture apparatus.

3. The system of claim 2 , wherein the LNG storage is a floating gas storage.

4. The system of claim 2 , further comprising:
a floating apparatus including the regasification and capture apparatus and the power generator and having a structure being floatable on a sea, the floating apparatus being a seagoing vessel.

5. The system of claim 4 , wherein the LNG storage is a floating gas storage.

6. The system of claim 4 , wherein the floating apparatus includes a first floating portion on which the regasification and capture apparatus is installed, and a second floating portion on which the power generator is installed.

7. The system of claim 6 , wherein the floating apparatus further includes a floating connector through which an intermediate fluid flows to exchange heat between the LNG of the regasification and capture apparatus and the flue gas of the power generator.

8. The system of claim 1 , wherein the regasification and capture apparatus includes an intermediate fluid for performing the heat exchange between the LNG and the flue gas.

9. The system of claim 8 , wherein the regasification and capture apparatus further includes a buffer for preventing explosion due to expansion of the intermediate fluid.

10. A system for utilizing carbon dioxide of a flue gas captured by cold heat of liquefied natural gas (LNG), the system comprising:
a mining-site apparatus including a mining apparatus for mining natural gas and further including a liquefier for liquefying the mined natural gas into the LNG, the mining apparatus configured to drill in an oil field from which the natural gas is extracted and to replace the extracted natural gas by injecting a filler into the oil field:
a transportation vehicle for transporting the LNG; and
a consumer-site apparatus including
a power generator configured to generate electricity and produce the flue gas,
an LNG storage configured to store the LNG transported by the transportation vehicle, and
a regasification and capture apparatus configured to regasify the LNG transported by the transportation vehicle and to capture dry ice from the carbon dioxide of the flue gas by receiving the flue gas from the power generator and perform a heat exchange between the LNG stored in the LNG storage and the flue gas produced by the power generator,

wherein the power generator generates the electricity by using the natural gas obtained by regasifying the LNG at the regasification and capture apparatus,
wherein, in the regasification and capture apparatus, the flue gas produced in the power generator exchanges heat with the LNG such that the LNG is regasified at an increased temperature and such that the dry ice is captured from the carbon dioxide contained in the flue gas,
wherein the transportation vehicle transports the captured dry ice to the mining-site apparatus, and
wherein the mining apparatus injects the carbon dioxide, as the filler, that forms the dry ice transported by the transportation vehicle to mine the natural gas.

11. The system of claim 10 , wherein the mining-site apparatus further includes a heater for changing a state of the transported dry ice to a higher state.

12. The system of claim 11 , wherein the heater heats the dry ice by using heat generated in the liquefier.

13. The system of claim 12 , wherein the heater withstands a pressure of at least 5 bar without a change in volume during a heating process.

14. The system of claim 11 , wherein the heater heats the dry ice by using at least one of seawater, air, and an electric heater.

15. A system for utilizing carbon dioxide of a flue gas captured by cold heat of liquefied natural gas (LNG), the system comprising:
a plurality of mining-site apparatuses, each for mining at least one of natural gas and crude oil;
a plurality of transportation vehicles, each for transporting the LNG obtained by liquefying the natural gas mined in at least one of the mining-site apparatuses; and
a plurality of consumer-site apparatuses, each for regasifying the transported LNG,
wherein each mining-site apparatus includes a mining apparatus for mining natural gas, and a liquefier for liquefying the mined natural gas into the LNG, the mining apparatus configured to drill in an oil field from which the natural gas is extracted and to replace the extracted natural gas by injecting a filler into the oil field,
wherein each consumer-site apparatus includes
a power generator configured to generate electricity and produce the flue gas,
an LNG storage configured to store the LNG transported by the transportation vehicle, and
a regasification and capture apparatus configured to regasify the LNG transported by the transportation vehicle and to capture dry ice from the carbon dioxide of the flue gas by receiving the flue gas from the power generator and perform a heat exchange between the LNG stored in the LNG storage and the flue gas produced by the power generator,

wherein the power generator generates the electricity by using the natural gas obtained by regasifying the LNG in the regasification and capture apparatus,
wherein, in the regasification and capture apparatus, the flue gas produced in the power generator exchanges heat with the LNG such that the LNG is regasified at an increased temperature and such that the dry ice is captured from the carbon dioxide contained in the flue gas,
wherein the transportation vehicle transports the captured dry ice to at least one of the plurality of mining-site apparatuses, and
wherein the mining apparatus injects the carbon dioxide, as the filler, that forms the dry ice transported by the transportation vehicle to mine the natural gas.

16. The system of claim 15 , wherein each mining-site apparatus further includes a heater for chang

Assignees

• Doosan Heavy Ind & Construction Co Ltd

Inventors

• Kim Sanghyeun
• Sung Hwachang
• Cha Songhun

Classifications

• B01D7/00

  Sublimation (B01D8/00 takes precedence; freeze-drying F26) · CPC title

• F25J1/0222

  in combination with an intermediate heat exchange fluid between the cryogenic component and the fluid to be liquefied (F25J1/0224 takes precedence) · CPC title

• F25J1/0228

  Coupling of the liquefaction unit to other units or processes, so-called integrated processes (combined plants, e.g. engine plant combined with an industrial process F01K23/064; gas turbine plants in combination with other processes F02C6/00) · CPC title

• F25J2205/20

  using solidification of components · CPC title

• F01K23/14

  including at least one combustion engine · CPC title