EVAPORATIVE GAS RELIQUEFYING METHOD

09-03-2017 дата публикации
Номер:
KR1020170027104A
Принадлежит:
Контакты:
Номер заявки: 01-15-102023598
Дата заявки: 01-09-2015

[1]

Reliquefying evaporated gas of the present invention refers to method relates to, particularly [ik[ik] panda evaporation gas reliquefaction method for reliquefying boil-off gas to effectively using are disclosed

[2]

Liquefied natural gas (LNG) at the time gas to opposite onshore than through suitable remote delivery. With regard heading for unloading LNG vehicles carrying LNG gas liquefied gas cargo is touched to the liquefied gas which, to this end the flow of liquefied gas cryogenic storage tank can withstand without using a tool.

[3]

LNG is about at a normal temperature with the cryogenic separation -160 °C since, even if only slightly than high temperature at a normal temperature has a curved LNG -160 °C evaporated substrate. Of the existing method LNG vehicle event e.g. described, LNG LNG storage tank allows masters are insulated but of transportation, LNG exists permanently to an external heat transporting LNG by LNG storage tank in a vehicle LNG during LNG is continuously evaporated, in LNG storage tank boil-off gas (BOG; boil provided off Gas) is generated.

[4]

The present invention refers to as one aspect, a method for reliquefying boil-off gas effectively under public affairs intended for reliquefying the number.

[5]

In order to achieve said purposes such as as one aspect, the present invention refers to a compressor in a liquefied natural gas storage tank and evaporation of flue gas compression stream number 1, number 2 and number 3 stream stream stream number 1 separation step for separating said number 1, said number 2 stream said number 1 stream cools the transfer medium while cooled and in heat exchange with the heat exchanger, and expanding said number 2 stream enters in [ik[ik] panda therein is depressurized, [ik[ik] panda job number 1 and pressure member and the rotating shaft, said number 2 number 4 number 5 in the vapor stream divided into a liquid stream comprising a reliquefying boil gas separation method number 2 number under public affairs substrate.

[6]

As one aspect of the present invention, said number 1 in said stream pressure arising from the rotating force to the rotor blade [ik[ik] panda said number 1 in [ik[ik] panda connected said electric generator is driven so that those produced characterized.

[7]

As one aspect of the present invention, said step in said number 1 connected by said rotational pressure expander in [ik[ik] panda pressurizing a stream characterized in that said compressor is driven so that said number 1.

[8]

As one aspect of the present invention, said number 1 number 1 and number 2 after said number 2 stream pressure is reduced in pressure by the expansion valve can be expanded pressure.

[9]

As one aspect of the present invention, divided into a number 3 separation step before said number 2 stream pressure said number 1 number 2 - 1 stream number 2 - 2; and, said number 3 separation step after said number 1 pressure sensitive step of returning said number 2 - 1 stream and expanding said stream branch with [ik[ik] panda said number 2 therein is depressurized, said number 2 - 2 therein is depressurized after swelling said expander exhaust stream expansion valve number 2 in said number 2 - 1 stream number 2 can be incorporated in the stream.

[10]

As one aspect of the present invention, divided into a number 3 separation step before said number 2 stream pressure said number 1 number 2 - 1 stream number 2 - 2; and,

[11]

Pressure step after said number 3 separation step of returning said number 1 stream branch therein is depressurized expanding said stream and said number 2 - 1 with [ik[ik] panda said number 2, number 2 in said number 2 - 2 therein is depressurized after swelling said expander exhaust stream expansion valve incorporated in the number 2 to establish said number 2 - 1 stream, said number 2 incorporated therein is depressurized in said number 2 stream expansion valve expanding said number 1 can be pressure step.

[12]

As one aspect of the present invention, said heat exchanger prior to entering said number 1 stream said number 4 stream is incorporated into the disclosed.

[13]

As one aspect of the present invention, said number 5 stream enters tank can be stored.

[14]

In the embodiment of the present invention according to one diode, through the boil-off gas is rotating rotor blade while expansion and injects [ik[ik] panda do that, it is further cooled by reliquefying boil-off gas can be more effectively.

[15]

In the embodiment of the present invention are also Figure 6 shows a representing reliquefying evaporation gas process other 1 to also are disclosed. In the embodiment of the present invention to Figure 9 shows a reliquefying order of method by semi-gas also 7 one also are disclosed.

[16]

Hereinafter, the present invention according to the appended detailed drawing of the SFC substrate.

[17]

First, in the embodiment described hereinafter in understanding the present invention are suitable in the embodiment (S100) evaporated gas of reliquefaction method are disclosed. But, the present invention is not limited in the embodiment described hereinafter in the embodiment of the present invention characterized or described applied by the number one has the technical, techniques of the present invention range in various modified embodiment permits.

[18]

The reference also 1 and 7 also, in the embodiment of the present invention (S100) by semi-gas reliquefaction method one compressor (120) is storage tank (180) evaporation of a liquefied natural gas stream in flue gas (S1) (S110) on a compression step number 1, number 2 (S2) and (S3) (S1) said number 1 stream a stream (S120) number 1 to number 3 stream separation separation, said number 2 stream (S2) heat exchanger (110) (S1) in heat exchange with a cooled cooled (S130) on said number 1 stream, said number 2 stream (S2) the expander (130) of the tank and the pressure on the step number 1 (S150) rotating a rotor blade of a, said number 2 (S2) of the apatitic number 5 (S5) stream of vapor stream number 4 stream (99900001499 99) separation (S170) number 2 separation step comprising the following.

[19]

The reference also 1, said compression step (S110) is storage tank (180) number 1 (S1) flue gas stream exiting the evaporator a compressor (120) compressing the returning are disclosed. Said number 1 stream (S1) includes a compressor (120) is compressed in the after cooler (160) can be cooled by the cooling. Wherein a cooler or air-cooled cooler (cooler) liquid cooled implementation being.

[20]

And, said number 1 (S120) (S1) and (S2) said number 2 stream in a separation step (S3) to said number 1 stream number 3 stream are isolated each other.

[21]

And, in said step of cooling said number 2 stream heat exchanger (S2) (S130) (110) (S1) cooling said number 1 stream in heat exchange with the reaction chamber. The reference also 1, said number 1 stream (S1) the storage tank (180) after exiting the heat exchanger (110) through the compressor (120) compressed and enters, said number 2 stream (S2) is said storage tank (180) (S1) and said number 1 stream generated in a low temperature heat exchanger (110) cooled through heat exchange.

[22]

And, said number 1 separation step (S120) number 3 (S3) isolated from stream engine (170) can be used to fuel the drive means such as driving.

[23]

And, said number 1 (S150) is a step (S2) said number 2 stream pressure expander (130) (expander) number 2 stream can be cooled therein is depressurized returning to expand. In addition said number 2 (S2) while said expanded stream expander (130) by rotating a rotor blade of a internal work outside can be further cooled.

[24]

Wherein, said expander (130) is arranged to enter the refrigerant expansion and injects installed to a rotor blade of a variety of publicly known work is accomplished in the embodiment can be employed. Thus said number 1 step (S150) pressure in said expander (130) number 2 (S2) through some of the liquid natural gas stream is liquefied and mixed natural gas is wake-up state gas-liquid separator (150) introduced into the substrate.

[25]

And, said number 2 (S170) is separation, said gas-liquid separator (150) with a predetermined number 2 (S2) (S4) (S5) of the apatitic number 5 stream of vapor stream number 4 stream separation steps are disclosed. A liquid natural gas stream number 5 (S5) the storage tank (180) open at, gaseous natural gas stream number 1 (S1) is liquefied and incorporated into the aforementioned reliquefaction process again after storage tank (180) can be entering.

[26]

The reference 2 also, in the embodiment of the present invention one (S100) by semi-gas reliquefaction method is, said expander (130) generator (190) connected to, said number 1 step (S150) pressure in said expander (130) is number 2 (S2) to enter the stream to said expander (130) for rotating a rotor blade of said generator by using rotational force occurs when the inside (190) can be driven to produce electricity.

[27]

The other in the embodiment, the reference also 3, said expander (130) to said compressor (120) connected to, said number 1 step (S150) pressure in said expander (130) is number 2 (S2) to enter the stream to said expander (130) rotating inside said by using rotational force occurs when a rotor blade of a compressor (120) in response to said number 1 to compress the stream (S1) can be.

[28]

In this case, said expander (130) to a rotating force of the driving force generated by said compressor (120) can be a portion of the driving power.

[29]

The reference also 4 and 8 also, in the embodiment of the present invention said number 1 (S150) (S100) by reliquefying evaporation gas pressure is one method step (S2) after said number 2 stream number 2 (S160) therein is depressurized again expanding step further comprises pressure can be. To this end, said expander (130) to said gas-liquid separator (150) number 1 between the expansion valve (141) can be a.

[30]

In this case, said number 1 expansion valve (141) is in one example, the corresponding line Thomson valve (joule-a thomson Valve) can be, said number 1 expansion valve (141) is said expander (130) in said gas-liquid separator (150) disposed between said expander (130) can be utilizing an opposite operation number. In particular, the vapor and liquid mixed with said number 2 stream (S2) state, said number 2 expansion valve (141) (S2) (S2) by said number 2 number to said number 2 stream pressure of the flow stream can be more stable.

[31]

The reference also 5 and also 9, in the embodiment of the present invention the method step (S150) (S100) by reliquefying evaporation gas of one pressure before said number 2 (S2) said number 1 and number 2 - 2 (S2 provided 1) stream is number 2 - 1 stream number 3 separation step (S140) which is branched into a stream (S2 provided 2) can be.

[32]

And, said number 3 separation step (S140) said number 1 (S150) after step (S2) said number 2 stream is pressure in branch (S2 provided 1) said number 2 - 1 stream to said expander (130) capable of expansion and enter the reduced pressure. A number 2 and said number 2 - 2 stream (S2 provided 2) expansion valve (142) after swelling therein is depressurized in said expander (130) (S2 provided 1) discharging said number 2 - 1 stream to be incorporated. And, said number 2 - 1 stream number 2 (S2) and (S2 provided 2) incorporating said number 2 - 2 stream (S2 provided 2) stream formed said gas-liquid separator (150) can be inlet.

[33]

Thus, said number 2 (S2) amount of evaporation gas inlet stream said number 2 (S2) to a polarity (S2 provided 2) said number 2 - 2 which is branched into each said 2 - 1 stream stream stream to said expander (130) on said number 2 expansion valve (142) can be liquefy boil-off gas passing.

[34]

Wherein, said number 2 expansion valve (142) is a by-pass valve may be (Bypass Valve), said expander (130) are operated normally does not, said number 2 stream (S2) and said expander (130) do not introduce to bypass the system stability can be operating. Said number 2 expansion valve (142) is one example of the rope Thomson valve (joule-a thomson Valve) is can be corresponding to the data.

[35]

The reference also 6 and 9 also, in the embodiment of the present invention method is one by reliquefying evaporation gas (S100), also shown in 1 to 5 (S100) also reliquefying evaporated gas of each mixing method that make each of these stages, compressor (120) is storage tank (180) number 1 (S1) evaporation of a liquefied natural gas stream in flue gas compression step (S110) on, said number 1 and number 2 (S2) and (S3) (S1) stream stream number 1 (S120) number 3 stream separation on separation, said number 2 stream heat exchanger (S2) (110) (S1) (S130) in heat exchange with the cooling step in said number 1 stream cooling without using a tool.

[36]

And, after said cooling step (S130), said number 2 stream (S2) (S2 provided 1) and a number 2 - 1 stream number 3 (S140) (S2 provided 2) number 2 - 2 stream separation can be a separation. Said number 3 separation step and said number 1 of a pressure step (S2 provided 1) said number 2 - 1 stream said expander (130) therein is depressurized expanding and returning, said number 2 - 2 stream a number 2 (S2 provided 2) expansion valve (142) after swelling therein is depressurized in said expander (130) (S2) (S2 provided 1) incorporated in the exhaust stream back to said number 2 - 1 stream number 2 can be formed.

[37]

And, said number 1 number 1 number 2 stream is incorporated after pressure expansion valve (141) and injects in additionally can be expanded.

[38]

Where, such as the aforementioned, said number 2 expansion valve (142) is a by-pass valve may be (Bypass Valve), said expander (130) are operated normally does not, said number 2 stream (S2) and said expander (130) do not introduce to bypass the system stability can be operating.

[39]

In addition, in the embodiment of the present invention a device for reliquefying boil-off gas by one step (S2) is number 2 (start up) when the stream in said expander (130) do not introduce to bypass the, said number 2 is number 2 - 2 stream (S2 provided 2) expansion valve (142) is reduced in pressure and can be expanded.

[40]

Wherein, said number 2 expansion valve (142) is one example of the rope Thomson valve (joule-a thomson Valve) is can be corresponding to the data.

[41]

And, said number 2 (S2) and injects the expanded stream separator (150) enters the liquid natural gas vapor separated from natural gas, liquid natural gas in the storage tank (180) and the gaseous natural gas stream entering the number 1 (S1) can be reliquefying the aforementioned thing of the plurality.

[42]

And, in the embodiment shown and described with respect to the present invention refers to a specific but until now, of the present invention outside the field of patent claims hereinafter provided by the present invention in various mental or not limit side and bottom can be varied and that a user typically encountered in the art having knowledge of the broadcast receiver may be found hereinafter for divided into two.

[43]

110: heat exchanger 120: compressor 130: expander 141: number 1 expansion valve 142: number 2 expansion valve 150: gas-liquid separator 160: cooler 170: engine 180: storage tank 190: generator



[1]

The present invention relates to an evaporative gas reliquefying method including: a compressing step of compressing a first stream composed of evaporative gases of a liquefied natural gas generated in a storage tank with a compressor; a first separation step of separating the first stream into a second stream and a third stream; a cooling step of cooling the second stream by heat-exchanging the second stream with the first stream with a heat exchanger; a first decompressing step of decompressing and expanding the second stream by sending the second stream into an expander and performing a work by rotating rotary blades of the expander; and a second separation step of separating the second stream into a gaseous fourth stream and a liquid fifth stream. According to an embodiment of the present invention, evaporative gases gone through an expander rotate rotary blades while being decompressed and expanded, thereby being cooler. Accordingly, the evaporative gases can be reliquefied more effectively.

[2]

COPYRIGHT KIPO 2017

[3]



Evaporation of a liquefied natural gas storage tank compressor in a compression step number 1 flue gas stream; said number 1 stream number 1 number 2 number 3 stream divided into a separation; said number 2 stream heat exchanger in heat exchange with said number 1 stream cools the transfer medium while cooled; and expanding said number 2 stream therein is depressurized enters in [ik[ik] panda, [ik[ik] panda rotor blade member and the pressure step job number 1; said number 2 and number 5 a number 2 number 4 divided into liquid stream and the vapor stream separation; the evaporation gas reliquefaction method comprising.

According to Claim 1, pressure in said number 1, rotating said rotational force generated by said rotor blade [ik[ik] panda said number 1 stream generator characterized in [ik[ik] panda connected evaporation gas reliquefaction method selected from a group consisting is produced.

According to Claim 1, said number 1 pressure step, said expander in said compressor is driven so that said number 1 in [ik[ik] panda connected said power by pressurizing a stream of evaporation gas reliquefaction method characterized.

According to Claim 1, pressure after said number 1, number 2 therein is depressurized in said number 2 stream number 1 expansion valve for expanding pressure step; including a evaporated gas of reliquefaction method.

According to Claim 1, divided into a number 3 separation step before said number 2 stream pressure said number 1 number 2 - 1 stream number 2 - 2; and, said number 3 separation step after said number 1 pressure sensitive step of returning said number 2 - 1 stream and expanding said stream branch with [ik[ik] panda said number 2 therein is depressurized, said number 2 - 2 therein is depressurized after swelling said expander exhaust stream expansion valve number 2 in said number 2 - 1 stream number 2 evaporation gas reliquefaction method characterized in that incorporated in the stream.

According to Claim 4, said number 2 stream is divided into a number 3 separation step before said number 1 number 2 - 1 number 2 - 2 pressure stream; and, said number 3 separation step after said number 1 pressure sensitive step of returning said number 2 - 1 stream and expanding said stream branch with [ik[ik] panda said number 2 therein is depressurized, said number 2 - 2 stream number 2 expansion valve (142) therein is depressurized in said expander exhaust stream after swelling to establish said number 2 - 1 incorporated in the number 2, said number 2 incorporated therein is depressurized in said number 1 expansion valve for expanding said number 2 stream pressure step evaporation gas reliquefaction method characterized.

According to Claim 1, said number 4 stream is said heat exchanger prior to entering the beam irradiated from the second evaporated gas of reliquefaction method characterized said number 1 stream.

According to Claim 1, characterized in that said number 5 stream enters tank evaporation gas reliquefaction method stored.