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1. 发明授权

US11578914B2 Method of cooling boil-off gas and apparatus therefor 有权
公开(公告)号：US11578914B2
公开(公告)日：2023-02-14
申请号：US16606335
申请日：2018-04-18
申请人： LGE IP Management Company Limited
发明人： Nikola Felbab
IPC分类号： F25J1/00 , F25B1/047 , F25B31/00 , F25B43/02 , F25J1/02
摘要： A method of cooling a boil-off gas (BOG) stream from a liquefied gas tank comprising at least the step of heat exchanging the BOG stream with a first refrigerant in a heat exchanger, the heat exchanger having an entry port and a warmer exit port, and comprising at least the steps of: (a) passing the first refrigerant into the entry port of the heat exchanger and into a first zone of the heat exchanger to exchange heat with the BOG stream, to provide a first warmer refrigerant stream; (b) withdrawing the first warmer refrigerant stream from the heat exchanger at an intermediate exit port between the entry port and the warmer exit port; (c) admixing the first warmer refrigerant stream with an oil-containing refrigerant stream to provide a combined refrigerant stream; (d) passing the combined refrigerant stream into the heat exchanger through an entry port located in a second zone of the heat exchanger that is warmer than the first zone; (e) passing the combined refrigerant stream out of the heat exchanger through the warmer exit port. The present invention is a modification of a refrigerant cycle for BOG cooling, and LNG re-liquefaction in particular, that allows the use of a cost-efficient oil-injected screw compressor in the refrigerant system. The present invention is also able to accommodate the possibility of different flows or flow rates of the first refrigerant stream and the oil-containing refrigerant stream, such that there is reduced or no concern by the user of the process in relation to possible oil freezing and clogging of the heat exchanger caused by variation of the flow or flow rate of the oil-containing refrigerant stream.

2. 发明申请

WO2022123215A2 METHOD AND APPARATUS FOR RECOVERING CARBON DIOXIDE FROM A COMBUSTION ENGINE EXHAUST 审中-公开
公开(公告)号：WO2022123215A2
公开(公告)日：2022-06-16
申请号：PCT/GB2021/053126
申请日：2021-12-01
申请人： LGE IP MANAGEMENT COMPANY LIMITED
发明人： FELBAB, Nikola
IPC分类号： B01D53/26 , B01D53/00 , F25J3/06 , B01D2256/18 , B01D2256/22 , B01D2257/504 , B01D2258/01 , B01D2258/018 , B01D2258/025 , B01D53/0476 , B01D53/265 , B01D53/62 , B01D53/92 , F25J2210/04 , F25J2210/50 , F25J2210/62 , F25J2210/70 , F25J2215/04 , F25J2220/82 , F25J2230/30 , F25J2245/02 , F25J2270/02 , F25J2270/904 , F25J3/067 , F25J3/08
摘要： A method and apparatus for recovering carbon dioxide (CO2) from an oxyfuel combustion engine exhaust stream is described. The method comprises: providing and separating an oxyfuel combustion engine exhaust stream to provide a first liquefied CO2 stream and a first waste gas stream; condensing at least a portion of the first waste gas stream to provide a partly condensed waste gas stream; and separating the condensed waste gas stream to provide a second waste gas stream, and a second liquefied CO2 stream.

3. 发明申请

WO2022234250A1 METHOD OF TREATING A PURGE GAS STREAM TO REMOVE AMMONIA 审中-公开
公开(公告)号：WO2022234250A1
公开(公告)日：2022-11-10
申请号：PCT/GB2022/051049
申请日：2022-04-26
申请人： LGE IP MANAGEMENT COMPANY LIMITED
发明人： FELBAB, Nikola
IPC分类号： B01D53/14 , B01D53/58 , F02D19/06 , F02M21/02 , B01D53/96
摘要： A method of treating an ammonia-containing purge gas stream on a vessel is described, the method comprising at least the steps of: (a) providing the ammonia-containing purge gas stream from a vessel engine; and (b) passing the ammonia-containing purge gas stream through a first tank containing water to provide a reduced-ammonia vent gas stream.

4. 发明申请

WO2022123215A1 METHOD AND APPARATUS FOR RECOVERING CARBON DIOXIDE FROM A COMBUSTION ENGINE EXHAUST 审中-公开
公开(公告)号：WO2022123215A1
公开(公告)日：2022-06-16
申请号：PCT/GB2021/053126
申请日：2021-12-01
申请人： LGE IP MANAGEMENT COMPANY LIMITED [GB]/[GB]
发明人： FELBAB, Nikola
IPC分类号： B01D53/26 , B01D53/00 , F25J3/06
摘要： A method and apparatus for recovering carbon dioxide (CO2) from an oxyfuel combustion engine exhaust stream is described. The method comprises: providing and separating an oxyfuel combustion engine exhaust stream to provide a first liquefied CO2 stream and a first waste gas stream; condensing at least a portion of the first waste gas stream to provide a partly condensed waste gas stream; and separating the condensed waste gas stream to provide a second waste gas stream, and a second liquefied CO2 stream.

5. 发明授权

US12044468B2 Method of cooling boil-off gas and apparatus therefor 有权
公开(公告)号：US12044468B2
公开(公告)日：2024-07-23
申请号：US17635110
申请日：2020-08-21
申请人： LGE IP Management Company Limited
发明人： Nikola Felbab
IPC分类号： F25J1/00 , F25J1/02
CPC分类号： F25J1/0025 , F25J1/0055 , F25J1/0277 , F25J2290/32
摘要： A method of cooling a boil-off gas (BOG) stream from a liquefied gas tank comprising at least the step of heat exchanging the BOG stream with a first refrigerant in a heat exchanger, the heat exchanger having an entry port and a warmer exit port, and comprising at least the steps of: (a) passing the first refrigerant into the entry port of the heat exchanger and into a first zone of the heat exchanger to exchange heat with the BOG stream, to provide a first warmer refrigerant stream; (b) withdrawing the first warmer refrigerant stream from the heat exchanger at an intermediate exit port between the entry port and the warmer exit port; (c) passing the first warmer refrigerant stream through an entry port located in a second zone of the heat exchanger that is warmer than the first zone (d) passing an oil-containing refrigerant stream through an entry port located in a second zone of the heat exchanger that is warmer than the first zone; (e) mixing the first warmer refrigerant stream and the oil-containing stream in the heat-exchanger to form a combined refrigerant stream; and (f) passing the combined refrigerant stream out of the heat exchanger through the warmer exit port.

6. 发明授权

US11561042B2 Method of cooling boil-off gas and apparatus therefor 有权
公开(公告)号：US11561042B2
公开(公告)日：2023-01-24
申请号：US16079656
申请日：2017-02-27
申请人： LGE IP Management Company Limited
发明人： Nikola Felbab
IPC分类号： F25J1/00 , F25J1/02
摘要： The present invention is a modification of a typical single mixed refrigerant (SMR) cycle for LNG re-liquefaction in particular, that allows the use of a cost-efficient oil-injected screw compressor in the mixed refrigerant system. In comparison with the typical arrangement, the present innovation allows for reduced complexity, fewer pieces of equipment, and reduced capital cost. There is shown a method of cooling a boil-off gas (BOG) stream from a liquefied gas tank using a single mixed refrigerant (SMR) comprising at least the step of heat exchanging the BOG stream with the SMR in a liquefaction heat exchanger system to provide a cooled BOG stream, wherein the SMR is provided in an SMR recirculating system comprising at least the steps of: (a) compressing the SMR using at least one oil-injected screw compressor to provide a post-compression SMR stream; (b) separating the post-compression SMR stream to provide an oil-based stream and a first SMR vapour stream; (c) passing the first SMR vapour stream into the liquefaction heat exchanger system to cool the first SMR vapour stream and provide a cooled first SMR vapour stream; (d) withdrawing the cooled first SMR vapour stream from the liquefaction heat exchanger system; (e) separating the cooled first SMR vapour stream to provide a liquid-phase SMR stream and an oil-free SMR vapour stream; (f) passing the oil-free SMR vapour stream through the liquefaction heat exchanger system to provide a condensed SMR stream; and (g) expanding the condensed SMR stream to provide an expanded lowest-temperature SMR stream to pass through the liquefaction heat exchanger system for heat exchange against the BOG stream.

7. 发明申请

US20220187014A1 Method Of Cooling Boil Off Gas And An Apparatus Therefor 有权
公开(公告)号：US20220187014A1
公开(公告)日：2022-06-16
申请号：US17598345
申请日：2020-03-25
申请人： LGE IP Management Company Limited
发明人： Martin Halcrow
IPC分类号： F25J1/02 , F25J1/00 , B63B35/28 , B63B25/14
摘要： A method of cooling a boil off gas stream from a liquefied cargo (50a) in a floating transportation vessel is described. The method comprises: compressing a boil off gas stream in two or more stages of compression to provide a compressed BOG discharge stream; cooling the compressed BOG discharge stream against one or more first coolant streams to provide a first cooled compressed BOG stream; cooling the first cooled compressed BOG stream against at least one second coolant stream to provide a second cooled compressed BOG stream; providing a vessel fuel stream from the liquefied cargo; using the vessel fuel stream as a coolant stream to cool either the compressed BOG discharge stream, or the first cooled compressed BOG stream, or both said streams.

8. 发明授权

US12013179B2 Method of cooling boil off gas and an apparatus therefor 有权
公开(公告)号：US12013179B2
公开(公告)日：2024-06-18
申请号：US17598345
申请日：2020-03-25
申请人： LGE IP Management Company Limited
发明人： Martin Halcrow
IPC分类号： F25J1/00 , B63B25/14 , B63B35/28 , F25J1/02
CPC分类号： F25J1/0277 , B63B25/14 , B63B35/28 , F25J1/0025 , F25J1/0045 , F25J1/0052 , F25J1/0087 , F25J1/0208 , F25J1/023 , F25J1/0274 , F25J2230/04 , F25J2235/60 , F25J2270/90
摘要： A method of cooling a boil off gas stream from a liquefied cargo (50a) in a floating transportation vessel is described. The method comprises:

compressing a boil off gas stream in two or more stages of compression to provide a compressed BOG discharge stream;
cooling the compressed BOG discharge stream against one or more first coolant streams to provide a first cooled compressed BOG stream;
cooling the first cooled compressed BOG stream against at least one second coolant stream to provide a second cooled compressed BOG stream;
providing a vessel fuel stream from the liquefied cargo;
using the vessel fuel stream as a coolant stream to cool either the compressed BOG discharge stream, or the first cooled compressed BOG stream, or both said streams.

9. 发明申请

US20220275998A1 Method of Cooling Boil-Off Gas and Apparatus Therefor 有权
公开(公告)号：US20220275998A1
公开(公告)日：2022-09-01
申请号：US17635110
申请日：2020-08-21
申请人： LGE IP Management Company Limited
发明人： Nikola Felbab
IPC分类号： F25J1/00 , F25J1/02
摘要： A method of cooling a boil-off gas (BOG) stream from a liquefied gas tank comprising at least the step of heat exchanging the BOG stream with a first refrigerant in a heat exchanger, the heat exchanger having an entry port and a warmer exit port, and comprising at least the steps of: (a) passing the first refrigerant into the entry port of the heat exchanger and into a first zone of the heat exchanger to exchange heat with the BOG stream, to provide a first warmer refrigerant stream; (b) withdrawing the first warmer refrigerant stream from the heat exchanger at an intermediate exit port between the entry port and the warmer exit port; (c) passing the first warmer refrigerant stream through an entry port located in a second zone of the heat exchanger that is warmer than the first zone (d) passing an oil-containing refrigerant stream through an entry port located in a second zone of the heat exchanger that is warmer than the first zone; (e) mixing the first warmer refrigerant stream and the oil-containing stream in the heat-exchanger to form a combined refrigerant stream; and (f) passing the combined refrigerant stream out of the heat exchanger through the warmer exit port.

10. 发明申请

US20220099365A1 Method of Cooling Boil-Off Gas and Apparatus Therefor 有权
公开(公告)号：US20220099365A1
公开(公告)日：2022-03-31
申请号：US17429981
申请日：2020-02-05
申请人： LGE IP MANAGEMENT COMPANY LIMITED
发明人： Nik Felbab
IPC分类号： F25J1/00 , F25J1/02
摘要： There is provided a method of cooling a boil-off gas (BOG) stream from a liquefied gas tank using a single mixed refrigerant (SMR) comprising at least the step of heat exchanging the BOG stream with the SMR in a liquefaction heat exchanger system to provide a cooled BOG stream, wherein the SMR is provided in an SMR recirculating system comprising at least the steps of: (a) compressing the SMR using at least one centrifugal compressor to provide a post-compression SMR stream; (b) passing the post-compression SMR stream into the liquefaction heat exchanger system to cool the post-compression SMR stream and provide a cooled first SMR vapour stream; (c) withdrawing the cooled first SMR vapour stream from the liquefaction heat exchanger system; (d) separating the cooled first SMR vapour stream to provide a liquid-phase SMR stream and a light SMR vapour stream; (e) passing the light SMR vapour stream through the liquefaction heat exchanger system to provide a condensed SMR stream; and (f) expanding the condensed SMR stream to provide an expanded lowest-temperature SMR stream to pass through the liquefaction heat exchanger system for heat exchange against the BOG stream.

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