CN207197077U - A kind of natural gas liquefaction device and its system - Google Patents
A kind of natural gas liquefaction device and its system Download PDFInfo
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- CN207197077U CN207197077U CN201721014217.3U CN201721014217U CN207197077U CN 207197077 U CN207197077 U CN 207197077U CN 201721014217 U CN201721014217 U CN 201721014217U CN 207197077 U CN207197077 U CN 207197077U
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Abstract
A kind of natural gas liquefaction device and its system, it is related to natural gas field.The natural gas liquefaction device realizes the multi-level throttle refrigeration of azeotrope, ensure that the liquefaction effect of natural gas, significantly reduce energy consumption and cost in liquefaction process by setting the cooling cycle system to freeze with multi-stage compression.In addition, multi-stage compression separating technology can be realized using above-mentioned natural gas liquefaction device, show efficiently, energy-saving and environmental protection the advantages of.Therefore, above-mentioned natural gas liquefaction device and its system, it is not only able to effectively reduce energy consumption and cost in liquefied natural gas process, realize the maximization of enterprise profit, but also can be in the case where ensureing high-efficiency operation, reach energy-conservation and the dual purpose of environmental protection, there is important application value.
Description
Technical field
Natural gas field is the utility model is related to, in particular to a kind of natural gas liquefaction device and its system.
Background technology
Natural gas is a kind of efficient, cleaning, important fuel and raw material, and in fields such as traffic, industry, its application is very wide
It is general.But for natural gas as a kind of inflammable and explosive hazardous gas, its transport difficulty is larger, removes transport day using the defeated mode of pipe at present
Outside right gas, it is also a large amount of using being transported using tank car after by natural gas liquefaction by the way of, therefore turn into need to for the liquefaction of natural gas
The matter of utmost importance to be solved.
Domestic and international generally use single-stage mixing cryogen refrigerating liquefied gas technique at present.Single-stage mixing cryogen liquefaction is natural
Gas refrigeration process flow is simple, and equipment requirement is low, and investment is small, but its high energy consumption, production cost are higher.With expanding economy,
Environmental protection and the raising of power conservation requirement, reduce liquefied natural gas (LNG) production energy consumption, improve production efficiency have it is important social and economical
Meaning.
Utility model content
The purpose of this utility model is to provide a kind of natural gas liquefaction device, and it can be reduced in liquefied natural gas process
Energy consumption and cost, on the basis of seeking economic interests for enterprise, embody the social value of its energy-conserving and environment-protective.
Another object of the present utility model is to provide a kind of natural gas liquefaction system, and stable, fault rate is low, can
The energy consumption and cost of liquefied natural gas are effectively reduced, realizes the maximization of enterprise profit, while energy-conservation and environmental protection can also be realized
Dual purpose, therefore it has important application value.
What embodiment of the present utility model was realized in：
A kind of natural gas liquefaction device, it includes liquefaction system and cooling cycle system, wherein, mixed in cooling cycle system
Close cryogen stage compressor, one-level cooler, the gaseous phase outlet of azeotrope primary separator, azeotrope split-compressor,
Secondary coolers and azeotrope second-stage separator are sequentially connected, the liquid-phase outlet and liquefaction system of azeotrope second-stage separator
In cryogen heat exchanger, one-level choke valve is sequentially connected；
Azeotrope second-stage separator gaseous phase outlet and the azeotrope three-stage blower in cooling cycle system, three-level are cold
But device and azeotrope three-level separator are sequentially connected, azeotrope three-level separator liquid-phase outlet and the cryogen in liquefaction system
Heat exchanger, two-step throttle valve are sequentially connected；
Azeotrope three-level separator gaseous phase outlet and the azeotrope four-stage compressor in cooling cycle system, level Four are cold
But device and azeotrope fourth stage separator are sequentially connected, azeotrope fourth stage separator liquid-phase outlet and the cryogen in liquefaction system
Heat exchanger, three-level choke valve are sequentially connected；
Azeotrope fourth stage separator gaseous phase outlet connects successively with the cryogen heat exchanger in liquefaction system, level Four choke valve
Connect.
Further, in the utility model preferred embodiment, it is additionally provided with the ice chest in above-mentioned liquefaction system cold
Case separator, azeotrope fourth stage separator gaseous phase outlet, cryogen heat exchanger, cold box separator, cold box separator gaseous phase outlet
And Pyatyi choke valve is sequentially connected, cold box separator liquid-phase outlet is connected with level Four choke valve.
Further, in the utility model preferred embodiment, the liquid-phase outlet of above-mentioned azeotrope primary separator
It is connected with cryogen heat exchanger, and is provided with corresponding choke valve.
Further, in the utility model preferred embodiment, above-mentioned azeotrope stage compressor, azeotrope two
The azeotrope compound compressor that level compressor, azeotrope three-stage blower and azeotrope four-stage compressor are formed
Type is overall gear formula centrifugal compressor or reciprocating compressor.
Further, in the utility model preferred embodiment, above-mentioned azeotrope compound compressor is also provided with N levels
Compressor, so as to form azeotrope N level compressors, wherein, N is the integer more than or equal to five.
Further, in the utility model preferred embodiment, above-mentioned cooling cycle system also includes Pyatyi compression liquid
Change separator.
Further, in the utility model preferred embodiment, above-mentioned Pyatyi, which compresses and liquefies separator, includes mixing
Cryogen Pyatyi compressor, Pyatyi cooler and azeotrope Pyatyi separator, azeotrope fourth stage separator gaseous phase outlet is with mixing
Close cryogen Pyatyi compressor, Pyatyi cooler and azeotrope Pyatyi separator to be sequentially connected, azeotrope Pyatyi separator liquid
Mutually outlet is sequentially connected with the cryogen heat exchanger in liquefaction system, level Four choke valve, azeotrope Pyatyi separator gaseous phase outlet
It is sequentially connected with the cryogen heat exchanger in liquefaction system, Pyatyi choke valve.
Further, in the utility model preferred embodiment, above-mentioned choke valve is Joule-Thomson throttling expansion
Valve.
Further, in the utility model preferred embodiment, above-mentioned liquefaction system includes for removing natural gas
The heavy hydrocarbon separator of middle heavy hydrocarbon.
A kind of natural gas liquefaction system, it includes above-mentioned natural gas liquefaction device and purifying device for natural gas, natural gas
Purifier is arranged at the gas inlet of natural gas liquefaction device.
The beneficial effect of the utility model embodiment is：By set azeotrope stage compressor, one-level cooler and
Azeotrope primary separator, azeotrope split-compressor, secondary coolers and azeotrope second-stage separator, azeotrope
Three-stage blower, three-level cooler and azeotrope three-level separator, azeotrope four-stage compressor, level Four cooler and mixing
Cryogen fourth stage separator, the equipment that level Four throttling refrigeration prepares liquefied natural gas is constituted, realizes multi-stage gas-liquid separating technology,
So that the solution-air distribution of azeotrope is more uniform, cold flow and hot-fluid heat transfer temperature difference are more nearly, and significantly reduce liquefaction
During energy consumption and cost；In addition, the multi-stage separation technique realized using the natural gas liquefaction device can make mixing cold
Heavy constituent in agent is split into liquid without into low-temperature end, effectively prevent heavy constituent because temperature is too low be condensed into it is solid
The problem of body causes pipeline and equipment to block, and the temperature of product liquefied natural gas is reduced, reduce BOG gas.Therefore, this reality
With the natural gas liquefaction device and its system of new offer, the energy consumption that is not only able to effectively reduce in liquefied natural gas process and
Cost, the maximization of enterprise profit is realized, but also energy-conservation and the dual purpose of environmental protection can be realized.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 provides the planar structure schematic diagram of natural gas liquefaction device for the utility model first embodiment；
Fig. 2 provides the planar structure schematic diagram of natural gas liquefaction system for the utility model first embodiment；
Fig. 3 provides the planar structure schematic diagram of natural gas liquefaction device for the utility model second embodiment；
Fig. 4 provides the planar structure schematic diagram of natural gas liquefaction device for the utility model 3rd embodiment.
Icon：10- natural gas liquefaction systems；11- purifying device for natural gas；100- natural gas liquefaction devices；102- heavy hydrocarbons
Separator；108- motor；200- natural gas liquefaction devices；300- natural gas liquefaction devices；110- azeotrope one stage of compression
Machine；112- one-level coolers；114- azeotrope primary separators；116- azeotrope split-compressors；118- two levels cool down
Device；120- liquefaction systems；121- azeotrope second-stage separators；122- one-level choke valves；123- azeotrope three-stage blowers；
124- two-step throttle valves；125- three-level coolers；126- three-level choke valves；127- azeotrope three-level separators；128- level Four
Choke valve；129- azeotrope four-stage compressors；130- cryogen heat exchangers；131- level Four coolers；133- azeotrope level Four
Separator；140- cooling cycle systems；160- liquefied gas choke valves；180- LNG tanks；220- liquefaction systems；204-
Cold box separator；228- Pyatyi choke valves；230- cryogen heat exchangers；232- level Four choke valves；233- azeotropes level Four separates
Device；320- liquefaction systems；328- Pyatyi choke valves；330- cryogen heat exchangers；332- level Four choke valves；340- kind of refrigeration cycle system
System；370- Pyatyis compress and liquefy separator；372- azeotrope Pyatyi compressors；374- Pyatyi coolers；376- mixing is cold
Agent Pyatyi separator.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Generally here described in accompanying drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of.
Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit requirement below
The scope of the utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
, it is necessary to explanation, the orientation of the instruction such as term " on ", " under ", " interior ", " outer " in description of the present utility model
Or position relationship be based on orientation shown in the drawings or position relationship, or the utility model product using when usually put
Orientation or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint phase
To importance.
In description of the present utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set
Put ", " installation ", " communicating ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected,
Or it is integrally connected；Can be joined directly together, can also be indirectly connected by intermediary, can be the company of two element internals
It is logical.For the ordinary skill in the art, it can understand that above-mentioned term is specific in the utility model with concrete condition
Implication.
First embodiment
Fig. 1 is refer to, present embodiments provides a kind of natural gas liquefaction device 100, it is mainly used in carrying out natural gas
Used during liquefaction.It should be noted that the natural gas liquefaction device 100 that the present embodiment provides, it includes liquefaction system 120 and system
SAPMAC method system 140, wherein, cooling cycle system 140 mainly carries out circulation compression refrigeration by azeotrope, so as to be day
Right gas creates conditions in the liquefaction of liquefaction system 120.
Specifically, the one stage of compression separation refrigeration for the natural gas liquefaction device 100 that the present embodiment provides is by following knot
The connected mode of structure realizes, azeotrope stage compressor 110 in cooling cycle system 140, one-level cooler 112, mixed
Close gaseous phase outlet, azeotrope split-compressor 116, secondary coolers 118 and the azeotrope two of cryogen primary separator 114
Level separator 121 is sequentially connected, and liquid-phase outlet and the cryogen in liquefaction system 120 of azeotrope second-stage separator 121 exchange heat
Device 130, one-level choke valve 122 are sequentially connected.
Further, the two-stage compression separation refrigeration for the natural gas liquefaction device 100 that the present embodiment provides is by following
The connected mode of structure realizes, the gaseous phase outlet of azeotrope second-stage separator 121 and the mixing in cooling cycle system 140
Cryogen three-stage blower 123, three-level cooler 125 and azeotrope three-level separator 127 are sequentially connected, the fraction of azeotrope three
It is sequentially connected from the liquid-phase outlet of device 127 and the cryogen heat exchanger 130 in liquefaction system 120, two-step throttle valve 124.
Further, the three stage compression separation refrigeration for the natural gas liquefaction device 100 that the present embodiment provides is by following
The connected mode of structure realizes, azeotrope three-level separator 127 gaseous phase outlet and the mixing in cooling cycle system 140
Cryogen four-stage compressor 129, level Four cooler 131 and azeotrope fourth stage separator 133 are sequentially connected, the fraction of azeotrope four
It is sequentially connected from the liquid-phase outlet of device 133 and the cryogen heat exchanger 130 in liquefaction system 120, three-level choke valve 126.
Further, the level Four compression separation refrigeration for the natural gas liquefaction device 100 that the present embodiment provides is by following
Come what is realized, the gaseous phase outlet of azeotrope fourth stage separator 133 exchanges heat the connected mode of structure with the cryogen in liquefaction system 120
Device 130, level Four choke valve 128 are sequentially connected.
It should be noted that among other embodiments, it is not limited in the above-mentioned natural gas liquid that the present embodiment is introduced
Change the level Four throttling refrigeration of equipment 100, can also be by the liquid-phase outlet of azeotrope primary separator 114 and cryogen heat exchanger
130 connections, and set corresponding choke valve, and Pyatyi throttling refrigeration is realized with this.
Further, the present embodiment preferably, azeotrope stage compressor 110, azeotrope split-compressor 116,
The class for the azeotrope compound compressor that azeotrope three-stage blower 123 and azeotrope four-stage compressor 129 are formed
Type is overall gear formula centrifugal compressor.It should be noted that the present embodiment uses azeotrope compound compressor, pressure is realized
The multi-stage booster of contracting machine, so that energy consumption drops to lower (pressurization close to isotherm compression).In addition, the present embodiment is using whole
Body gear type centrifugal compressor, it, which has, is more easy into sled and modular advantage.It is emphasized that work as in other embodiments
In, it is not limited in the present embodiment preferably overall gear formula centrifugal compressor type, can also be other types of compressor,
Such as reciprocating compressor.
Further, the liquefaction system 120 among the present embodiment is provided with the heavy hydrocarbon point for removing heavy hydrocarbon in natural gas
From device 102.This heavy hydrocarbon separator 102 is arranged in the pipeline of cryogen heat exchanger 130 of liquefaction system 120, and by will be cooled to-
50 DEG C -- after natural gas at 70 DEG C carries out heavy hydrocarbon separation, bottom exports the heavy hydrocarbon component of liquid, and top exports gaseous lighter hydrocarbons
Component simultaneously continues cooling liquid in cryogen heat exchanger 130.It should be noted that in order to ensure that heavy hydrocarbon separator 102 is longer
Service life and preferable performance, heavy hydrocarbon separator 102 are made up of stainless steel material, therefore can by using stainless steel material
To cause the anti-corrosion capability of heavy hydrocarbon separator 102 and anti-pressure ability to be guaranteed.
The operation principle of natural gas liquefaction device 100 that the present embodiment provides is：The refrigeration of natural gas liquefaction device 100 is followed
Loop system 140 is under the power support of motor 108, and driving azeotrope compressor operating not at the same level, azeotrope is first
By the compression of azeotrope stage compressor 110, the refrigeration of one-level cooler 112 and azeotrope primary separator 114
After gas-liquid separation, enter azeotrope split-compressor 116, secondary coolers 118 and azeotrope second-stage separator 121 according to
Secondary progress second-compressed, secondary cooling and secondary separation, the liquid phase azeotrope that secondary separation obtains is from the fraction of azeotrope two
Liquid-phase outlet from device 121 is imported into the cryogen heat exchanger 130 in liquefaction system 120, and subtracting by one-level choke valve 122
After pressure drop temperature, liquefied cold is provided for liquefaction system 120, and then be back to again in azeotrope stage compressor 110.
Further, the gas phase azeotrope that secondary separation obtains enters the azeotrope three-stage blower being sequentially connected
123rd, three-level cooler 125 and azeotrope three-level separator 127 carry out compression, cooling and the gas-liquid separation of third time, three times
The liquid-phase outlet of isolated liquid phase azeotrope from azeotrope three-level separator 127 imported into the cold of liquefaction system 120
In agent heat exchanger 130, and after the decompression cooling of two-step throttle valve 124, liquefied cold is provided for liquefaction system 120, is entered
And it is back to again in azeotrope stage compressor 110.
Further, isolated gas phase azeotrope enters the azeotrope four-stage compressor being sequentially connected three times
129th, level Four cooler 131 and azeotrope fourth stage separator 133 carry out compression, cooling and the gas-liquid separation of the 4th time, four times
Isolated liquid phase azeotrope imported into the cold of liquefaction system 120 from the liquid-phase outlet of azeotrope fourth stage separator 133
In agent heat exchanger 130, and after the decompression cooling of three-level choke valve 126, liquefied cold is provided for liquefaction system 120, is entered
And it is back to again in azeotrope stage compressor 110.
Further, gaseous phase outlet of four isolated gas phase azeotropes from azeotrope fourth stage separator 133
It imported into the cryogen heat exchanger 130 in liquefaction system 120, and after the decompression cooling of level Four choke valve 128, is for liquefaction
System 120 provides liquefied cold, and then is back to again in azeotrope stage compressor 110.
It should be noted that while cooling cycle system 140 provides liquefaction institute's chilling requirement for liquefaction system 120, enter
The natural gas entered to liquefaction system 120 is cooled to -50 DEG C to -70 DEG C first, then into being removed in heavy hydrocarbon separator 102
Heavy hydrocarbon component in natural gas, and then the natural gas for removing heavy hydrocarbon is again introduced into cryogen heat exchanger 130 and continues cooling liquid, and mistake
It is cooled to -162 DEG C, last liquefied natural gas is sent into liquefied natural gas storage after the decompression cooling of liquefied gas choke valve 160, as product
Stored in tank 180.In addition, it should also be noted that, in order to ensure preferable throttling refrigeration effect, the throttling that the present embodiment provides
Valve is Joule-Thomson throttle expansion valve, i.e. J-T valves.
Fig. 2 is refer to, the present embodiment additionally provides a kind of natural gas liquefaction system 10, and it includes above-mentioned natural gas liquefaction
Equipment 100 and purifying device for natural gas 11, purifying device for natural gas 11 are arranged at the gas inlet of natural gas liquefaction device 100
Place.It should be noted that why purifying device for natural gas 11 is arranged to the gas inlet of natural gas liquefaction device 100
Place, it is in order to which before natural gas enters liquefaction system 120, the purified treatments such as desulfurization, decarburization, dehydration, demercuration are carried out to it.
Second embodiment
Fig. 3 is refer to, the present embodiment provides a kind of natural gas liquefaction device 200, and it provides natural with first embodiment
Gas liquefaction equipment 100 is roughly the same, and difference is, the liquefaction system for the natural gas liquefaction device 200 that the present embodiment provides
Cold box separator 204 is additionally provided with 220 ice chests.
Specifically, the gaseous phase outlet of azeotrope fourth stage separator 233, cryogen heat exchanger 230, cold box separator 204, ice chest
The gaseous phase outlet of separator 204 and Pyatyi choke valve 228 are sequentially connected, the liquid-phase outlet of cold box separator 204 and level Four choke valve
232 connections.It should be noted that the natural gas liquefaction device 200 that the present embodiment provides is by setting cold box separator 204 to realize
The Pyatyi throttling refrigeration of azeotrope, further improve the refrigeration liquefying effect of natural gas liquefaction device 200.
3rd embodiment
Fig. 4 is refer to, present embodiments provides a kind of natural gas liquefaction device 300, its day provided with first embodiment
Right gas liquefaction equipment 100 is roughly the same, and difference is, the refrigeration for the natural gas liquefaction device 300 that the present embodiment provides is followed
Loop system 340 also compresses and liquefies separator 370 including Pyatyi.
Further, Pyatyi, which compresses and liquefies separator 370, includes azeotrope Pyatyi compressor 372, Pyatyi cooler
374 and azeotrope Pyatyi separator 376, wherein, the gaseous phase outlet of azeotrope fourth stage separator 133, azeotrope Pyatyi pressure
Contracting machine 372, Pyatyi cooler 374 and azeotrope Pyatyi separator 376 are sequentially connected, the liquid of azeotrope Pyatyi separator 376
Mutually outlet is sequentially connected with the cryogen heat exchanger 330 in liquefaction system 320, level Four choke valve 332, azeotrope Pyatyi separator
376 gaseous phase outlets are sequentially connected with the cryogen heat exchanger 330 in liquefaction system 320, Pyatyi choke valve 328.It should be noted that
The natural gas liquefaction device 300 that the present embodiment provides realizes azeotrope by setting Pyatyi to compress and liquefy separator 370
Pyatyi throttling refrigeration, further improve the refrigeration liquefying effect of natural gas liquefaction device 300.
It is emphasized that among other embodiments, it is not limited in the Pyatyi compression that the present embodiment is provided, may be used also
To realize that the N levels of azeotrope are compressed using N (N is more than or equal to six) level compressor.
In summary, the utility model is by setting azeotrope stage compressor, one-level cooler and azeotrope one
Level separator, azeotrope split-compressor, secondary coolers and azeotrope second-stage separator, azeotrope three stage compression
Machine, three-level cooler and azeotrope three-level separator, azeotrope four-stage compressor, level Four cooler and azeotrope level Four
Separator, the equipment that level Four throttling refrigeration prepares liquefied natural gas is constituted, realizes multi-stage gas-liquid separating technology, makes mixing cold
The solution-air distribution of agent is more uniform, allows cold flow and hot-fluid heat transfer temperature difference to be more nearly, significantly reduces the energy in liquefaction process
Consumption and cost.In addition, realize that multi-stage separation technique can also make the restructuring in azeotrope using above-mentioned natural gas liquefaction device
Point be completely segregated in liquid without into low-temperature end, effectively prevent heavy constituent because temperature is too low be condensed into solid caused by
The problem of line clogging, and reduce the temperature of product liquefied natural gas, reduce BOG gas, it is achieved thereby that efficiently, energy-conservation,
The natural gas liquefaction process effect of environmental protection.Therefore, natural gas liquefaction device provided by the utility model and its system, are not only able to
The energy consumption and cost in liquefied natural gas process are effectively reduced, realizes the maximization of enterprise profit, but also can ensure
In the case of high-efficiency operation, reach energy-conservation and the dual purpose of environmental protection.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (10)
- A kind of 1. natural gas liquefaction device, it is characterised in that it includes liquefaction system and cooling cycle system, wherein, the system Azeotrope stage compressor, one-level cooler, the gaseous phase outlet of azeotrope primary separator, mixing are cold in SAPMAC method system Agent split-compressor, secondary coolers and azeotrope second-stage separator are sequentially connected, the azeotrope second-stage separator Liquid-phase outlet is sequentially connected with the cryogen heat exchanger in the liquefaction system, one-level choke valve；The azeotrope second-stage separator gaseous phase outlet and the azeotrope three-stage blower in the cooling cycle system, three Level cooler and azeotrope three-level separator are sequentially connected, the azeotrope three-level separator liquid-phase outlet and the liquefaction The cryogen heat exchanger, two-step throttle valve in system are sequentially connected；The azeotrope three-level separator gaseous phase outlet and the azeotrope four-stage compressor in the cooling cycle system, four Level cooler and azeotrope fourth stage separator are sequentially connected, the azeotrope fourth stage separator liquid-phase outlet and the liquefaction The cryogen heat exchanger, three-level choke valve in system are sequentially connected；The azeotrope fourth stage separator gaseous phase outlet and the cryogen heat exchanger in the liquefaction system, level Four choke valve It is sequentially connected.
- 2. natural gas liquefaction device according to claim 1, it is characterised in that also set in the ice chest in the liquefaction system It is equipped with cold box separator, it is azeotrope fourth stage separator gaseous phase outlet, the cryogen heat exchanger, the cold box separator, described Cold box separator gaseous phase outlet and Pyatyi choke valve are sequentially connected, and the cold box separator liquid-phase outlet connects with level Four choke valve Connect.
- 3. natural gas liquefaction device according to claim 1, it is characterised in that the liquid of the azeotrope primary separator Mutually outlet is connected with cryogen heat exchanger, and is provided with corresponding choke valve.
- 4. according to the natural gas liquefaction device described in claim 1-3 any one, it is characterised in that the azeotrope one-level Compressor, the azeotrope split-compressor, the azeotrope three-stage blower and azeotrope level Four compression The type for the azeotrope compound compressor that machine is formed is overall gear formula centrifugal compressor or reciprocating compressor.
- 5. natural gas liquefaction device according to claim 4, it is characterised in that the azeotrope compound compressor is also set N level compressors have been put, so as to form azeotrope N level compressors, wherein, the N is the integer more than or equal to five.
- 6. natural gas liquefaction device according to claim 4, it is characterised in that the cooling cycle system also includes Pyatyi Compress and liquefy separator.
- 7. natural gas liquefaction device according to claim 6, it is characterised in that the Pyatyi compresses and liquefies separator bag Include azeotrope Pyatyi compressor, Pyatyi cooler and azeotrope Pyatyi separator, the azeotrope fourth stage separator gas Mutually outlet connects successively with the azeotrope Pyatyi compressor, the Pyatyi cooler and the azeotrope Pyatyi separator Connect, the azeotrope Pyatyi separator liquid-phase outlet and the cryogen heat exchanger in the liquefaction system, level Four choke valve It is sequentially connected, the azeotrope Pyatyi separator gaseous phase outlet and the cryogen heat exchanger in the liquefaction system, Pyatyi Choke valve is sequentially connected.
- 8. natural gas liquefaction device according to claim 7, it is characterised in that the choke valve is Joule-Thomson Throttle expansion valve.
- 9. natural gas liquefaction device according to claim 1, it is characterised in that liquefaction system includes natural for removing The heavy hydrocarbon separator of heavy hydrocarbon in gas.
- 10. a kind of natural gas liquefaction system, it is characterised in that it includes the natural gas as described in claim 1-9 any one Liquefaction device and purifying device for natural gas, the natural gas that the purifying device for natural gas is arranged at the natural gas liquefaction device enter At mouthful.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721014217.3U CN207197077U (en) | 2017-08-14 | 2017-08-14 | A kind of natural gas liquefaction device and its system |
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| CN201721014217.3U CN207197077U (en) | 2017-08-14 | 2017-08-14 | A kind of natural gas liquefaction device and its system |
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| CN207197077U true CN207197077U (en) | 2018-04-06 |
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| CN201721014217.3U Active CN207197077U (en) | 2017-08-14 | 2017-08-14 | A kind of natural gas liquefaction device and its system |
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2017
- 2017-08-14 CN CN201721014217.3U patent/CN207197077U/en active Active
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