US 12,145,100 B2
Ship with a carbon dioxide capture system
Henrik Fleischer, Slependen (NO); and Knut Erik Børseth, Sandefjord (NO)
Assigned to KARBON CCS LTD, Valletta (MT)
Appl. No. 18/271,560
Filed by Karbon CCS Ltd, Valletta (MT)
PCT Filed Jan. 12, 2022, PCT No. PCT/NO2022/050012
§ 371(c)(1), (2) Date Jul. 10, 2023,
PCT Pub. No. WO2022/154672, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 20210041 (NO), filed on Jan. 12, 2021.
Prior Publication US 2024/0066465 A1, Feb. 29, 2024
Int. Cl. B01D 53/62 (2006.01); B01D 46/66 (2022.01); B01D 53/34 (2006.01); B01D 53/78 (2006.01); B01D 53/96 (2006.01); F01N 3/08 (2006.01); F17C 5/06 (2006.01); F23G 7/06 (2006.01); F23J 15/04 (2006.01)
CPC B01D 53/62 (2013.01) [B01D 46/66 (2022.01); B01D 53/343 (2013.01); B01D 53/78 (2013.01); B01D 53/96 (2013.01); F01N 3/08 (2013.01); F17C 5/06 (2013.01); F23G 7/065 (2013.01); F23J 15/04 (2013.01); B01D 2251/306 (2013.01); B01D 2251/606 (2013.01); B01D 2257/504 (2013.01); B01D 2258/018 (2013.01); B01D 2259/4566 (2013.01); B01D 2259/65 (2013.01); F17C 2205/0323 (2013.01); F17C 2221/013 (2013.01); F17C 2227/0157 (2013.01); F17C 2227/0348 (2013.01); F17C 2270/0105 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A flue gas carbon dioxide capture and storage plant, comprising
a main engine arranged for providing a flue gas (FG),
an exhaust block and bleed valve unit for said flue gas (FG) arranged in an exhaust funnel; —an exhaust fan arranged after said exhaust block and bleed valve unit,
a flue gas heat exchanger with a thermal fluid exit arranged for feeding a re-boiler and configured for cooling said flue gas (FG),
a flue gas cooler arranged after the flue gas heat exchanger for cooled flue gas (FG) having a vapour drain and being configured to further cool the flue gas (FG) and yield further cooled flue gas (FG),
a compressor arranged after the flue gas cooler for compressing said further cooled flue gas (FG) up to a compressed flue gas (CFG), said compressor having a common axis with an expander arranged for expanding resulting CO2-reduced flue gas (CRFG),
a high pressure shell of a High Temperature Heat Exchanger (HTHE) arranged after said compressor and further connected to a high pressure shell of a combustion chamber also arranged for said compressed flue gas (CFG), said combustion chamber being enveloped by a perforated inner wall arranged for receiving said compressed flue gas (CFG) and comprising a fuel feed and a pre-mix gas burner arranged for afterburning said compressed flue gas (CFG) and for burning out remaining methane from said main engine, wherein
a self-cleaning filter is arranged before the flue gas heat exchanger, the flue gas cooler, the compressor, and the high pressure shell of the HTHE,
the combustion chamber is arranged to result in hot afterburned compressed flue gas (ACFG) thus enriched in CO2,
the afterburned compressed flue gas (ACFG) is arranged to be heat exchanged in said HTHE with returning resulting CO2-reduced flue gas (CRFG), which is arranged to heat CO2-reduced flue gas (CRFG) and further lead said heated CO2-educed flue gas (CRFG) to said expander,
the HTHE cools said afterburned compressed flue gas (ACFG),
the HTHE is connected to an SCR arranged for reducing an NOx content of said cooled afterburned compressed flue gas (ACFG),
a Low Temperature Heat Exchanger (LTHE) is arranged for further cooling of said afterburned compressed flue gas (ACFG),
the LTHE is arranged for heat exchanging with said cooled returning resulting CO2-reduced flue gas (CRFG) which goes to said HTHE,
a condenser is arranged for further cooling of said cooled, afterburned compressed flue gas (ACFG) and further arranged for conducting said cooled afterburned compressed flue gas (ACFG) sent through one or more CO2-absorber columns arranged for exchanging CO2 into a K2CO3/water solution and forming said CO2-reduced flue gas (CRFG) and a CO2-enriched absorber solution and further arranged to return said CRFG via a re-humidifier, through said LTHE and further via said HTHE and to said expander which is arranged for generating electrical energy at generator;
the CO2-absorber is arranged for leading said CO2-enriched absorber solution to a CO2-stripper and for exporting CO2 to a CO2-compressor to a CO2-export line to onboard CO2 pressure storage tanks,
a re-boiler is arranged for heating said CO2-stripper circulating said thermal fluid from said exit and for returning cooled CO2-lean absorber fluid to a pump arranged for feeding an absorbent, K2CO3/water, heat exchanger back to the top of said CO2 absorber columns.
 
7. A method for carbon dioxide capture and storage plant onboard a ship, comprising the steps of:
providing a flue gas (FG) by running a main engine;
leading said flue gas (FG) through an exhaust block and bleed valve unit in an exhaust funnel;
leading said flue gas (FG) through an exhaust fan after said exhaust block and bleed valve unit;
leading said flue gas through a self-cleaning filter after said exhaust fan;
leading said flue gas (FG) through a flue gas heat exchanger with a thermal fluid exit feeding a re-boiler after said self-cleaning filter, the flue gas heat exchanger cooling said flue gas (FG) to provide a cooled flue gas (FG);
further cooling said cooled flue gas (FG) in a flue gas cooler, with vapour drain to provide further cooled flue gas (FG);
compressing said further cooled flue (FG) in a compressor up to a compressed flue gas (CFG), said compressor being having a common axis with an expander arranged for expanding resulting CO2-reduced flue gas (CRFG);
feeding said compressed flue gas (CFG) into a high pressure shell of a High Temperature Heat Exchanger (HTHE), said high pressure shell of said HTHE being further fluid connected to a high pressure shell of a combustion chamber;
feeding said compressed flue gas (CFG) through a perforated inner wall enveloping said combustion chamber;
afterburning said compressed flue gas (CFG) in said combustion chamber using a fuel feed and a pre-mix gas burner, which also burns out remaining methane from said main engine, thereby resulting in hot afterburned compressed flue gas (ACFG) enriched in CO2;
heat exchanging said afterburned compressed flue gas (ACFG) in said HTHE producing returning resulting CO2-reduced flue gas (CRFG), thus heating said CO2-reduced flue gas (CRFG);
leading said heated CO2-reduced flue gas (CRFG) to said expander, wherein
said HTHE cools said afterburned compressed flue gas (ACFG),
an NOx content of said cooled afterburned compressed flue gas (ACFG) is reduced in an SCR connected from said HTHE,
said afterburned compressed flue gas (ACFG) is further cooled in a Low Temperature Heat Exchanger (LTHE), thereby heat exchanging said afterburned compressed flue gas (AFCG) with said cooled returning resulting CO2-reduced flue gas (CRFG) which is conducted to said HTHE,
said cooled, afterburned compressed flue gas (ACFG) is further cooled in a condenser,
cooled afterburned compressed flue gas (ACFG) is conducted through one or more CO2-absorber columns exchanging CO2 into a K2CO3/water solution and forming CO2-reduced flue gas (CRFG) and a CO2-enriched absorber solution, and said CRFG is returned via a re-humidifier through said LTHE and further via said HTHE and to said expander, thereby generating electrical energy at generator connected to said expander;
said CO2-enriched absorber solution is led from said CO2-absorber to a CO2-stripper and CO2 is exported to a CO2-compressor to a CO2-export line to onboard CO2 pressure storage tanks,
said CO2-stripper is heated using a re-boiler, circulating said thermal fluid from said exit and further returning cooled CO2-lean absorber fluid to a pump feeding an absorbent, K2CO3/water, heat exchanger back to the top of said CO2 absorber columns.