CN208419376U - A kind of device of azeotrope refrigeration liquefying natural gas - Google Patents
A kind of device of azeotrope refrigeration liquefying natural gas Download PDFInfo
- Publication number
- CN208419376U CN208419376U CN201820909117.5U CN201820909117U CN208419376U CN 208419376 U CN208419376 U CN 208419376U CN 201820909117 U CN201820909117 U CN 201820909117U CN 208419376 U CN208419376 U CN 208419376U
- Authority
- CN
- China
- Prior art keywords
- refrigerant compressor
- heat exchanger
- liquid separation
- separation tank
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to a kind of devices of azeotrope refrigeration liquefying natural gas, including azeotrope compressor, refrigerant compressor primary outlet cooler, refrigerant compressor secondary inlet liquid separation tank, refrigerant compressor secondary exit port cooler, one group of plate-fin heat exchanger, refrigerant compressor level-one entrance liquid separation tank, heavy hydrocarbon liquid separation tank, LNG storage tank；The refrigerant compressor primary outlet cooler, refrigerant compressor secondary inlet liquid separation tank, refrigerant compressor secondary exit port cooler, refrigerant compressor level-one entrance liquid separation tank are connected in parallel between azeotrope compressor and plate-fin heat exchanger, and heavy hydrocarbon liquid separation tank, LNG storage tank are connect with plate-fin heat exchanger respectively.The utility model has many characteristics, such as that low energy consumption, device is simple, total investment of engineering is low, variable working condition is adaptable.
Description
Technical field
The utility model relates to a kind of liquefaction Technology of Natural Gas, more particularly, to a kind of single cycle azeotrope two stages of compression
The system of refrigeration liquefying natural gas.
Background technique
Liquefied natural gas has been widely applied in the fields such as industrial, civilian, motor vehicle fuel as a kind of clean fuel, is permitted at present
Mostly the area of natural gas resource is not ready for solving the problems, such as industrial, civilian, motor vehicle fuel using liquefied natural gas, therefore day
The liquefaction of right gas becomes the matter of utmost importance for needing to solve.Currently, the natural gas liquefaction process of comparative maturity mainly has in following 3:
(1) cascade refrigeration process
Stepwise liquefaction flow path is the process flow for being applied to liquefied natural gas earliest, is answered extensively since the 1960s
For Basicloadtype natural gas liquefaction device.It is refrigeration that typical cascade refrigeration circulation, which is usually by propane, ethylene and methane,
The individual refrigeration system of 3 of agent is composed in series, and each system has a set of compressor set.Purified unstripped gas is made at 3
It cools down, condense, liquefy and is subcooled step by step in the cooler of SAPMAC method, low-temperature atmosphere-pressure liquid form product is obtained after reducing pressure by regulating flow.
(2) process is expanded
By swell refrigeration recycle based on LNG Lquified Process Flow be using turbo-expander carry out constant entropy expansion and reach
The process for the purpose that cools down.Frequent operation and require rapid starting/stopping peak regulation type device in, expansion process obtained good benefit
With.According to the difference of refrigerant, swell refrigeration circulation is divided into natural gas swell refrigeration technique, nitrogen expansion refrigeration process and nitrogen-
Methane swell refrigeration technique.
(3) azeotrope process
Hybrid refrigeration process is to be evolved by cascaded refrigeration process in latter stage in the sixties, mostly uses that C1's to C5 is hydrocarbon
Five kinds of compound and N2 etc. or more of multicomponent mix refrigerant is replaced multiple pure components in cascaded refrigeration process by working medium.Its
Refrigerant forms depending on the composition of unstripped gas and pressure, is first condensed, after light component using heavy constituent in multicomponent mixture
It is successively condensed, separates, throttles, evaporated and obtain the cooling capacity of different temperatures grade by the characteristic of condensation.
Wherein: the natural gas liquefaction process of swell refrigeration circulation is because plant energy consumption is excessively high, and list covering device treating capacity is small, in recent years
Come gradually by single-stage mixing cryogen refrigerating cycle liquefied technical substitution.Low energy consumption but process is multiple for stage refrigerating cycle liquefaction process
Miscellaneous, equipment investment is high.Therefore, natural gas liquefaction both at home and abroad mainly uses azeotrope refrigeration process (MRC) at present, or with propane
The refrigeration process (C3/MRC) of pre-cooling.But the concrete application of external azeotrope refrigeration patented technology is by many restrictions, work
Journey investment is high, the construction period is long；Process is complicated again for domestic existing azeotrope refrigeration process, and investment is high.
Utility model content
The purpose of this utility model be exactly in order to overcome the problems of the above-mentioned prior art and to provide a kind of device simple,
Invest the device of less azeotrope refrigeration liquefying natural gas.
The purpose of this utility model can be achieved through the following technical solutions: a kind of azeotrope refrigeration liquefying natural gas
Device, including azeotrope compressor, refrigerant compressor primary outlet cooler, refrigerant compressor secondary inlet liquid separation tank,
Refrigerant compressor secondary exit port cooler, one group of plate-fin heat exchanger, refrigerant compressor level-one entrance liquid separation tank, heavy hydrocarbon liquid separation
Tank, LNG storage tank；
The refrigerant compressor primary outlet cooler, refrigerant compressor secondary inlet liquid separation tank, refrigerant compressor two
Grade outlet cooler, refrigerant compressor level-one entrance liquid separation tank be connected in parallel azeotrope compressor and plate-fin heat exchanger it
Between, heavy hydrocarbon liquid separation tank, LNG storage tank are connect with plate-fin heat exchanger respectively.
The device further includes middle pressure cryogen throttling set, high pressure cryogen throttling set, natural gas flow control valve, cold
Agent compressor secondary inlet divides liquid tank temperature control valve；The middle pressure cryogen throttling set is mounted on plate-fin heat exchanger outlet
In force down on warm liquid phase pipeline, the high pressure cryogen throttling set be mounted on plate-fin heat exchanger outlet high pressure low temperature liquid-phase tube
On line, the natural gas flow control valve is mounted on the pipeline that plate-fin heat exchanger is connect with LNG storage tank, refrigerant compressor
Secondary inlet divides liquid tank temperature control valve to be mounted on the outlet line of refrigerant compressor primary outlet cooler.It is to be processed natural
After gas enters plate-fin heat exchanger cooling, separated into heavy hydrocarbon liquid separation tank, after gas phase return plate-fin heat exchanger further cools down,
Enter LNG storage tank through natural gas flow control valve.
The refrigerant compressor secondary inlet liquid separation tank connects three road pipelines: wherein pipeline is connection azeotrope all the way
The gaseous phase outlet pipeline of compressor and refrigerant compressor secondary inlet liquid separation tank, the second road pipeline be connection plate-fin heat exchanger with
The refrigerant compressor secondary inlet liquid separation tank of refrigerant compressor secondary inlet liquid separation tank exports liquid phase pipeline, third road pipeline be from
Plate-fin heat exchanger is back to the refrigerant compressor secondary inlet liquid separation tank import of refrigerant compressor secondary inlet liquid separation tank entrance
Pipeline.
The outlet line of the refrigerant compressor primary outlet cooler connects two branch lines: refrigerant compressor one
Grade outlet pipe of cooler one and refrigerant compressor level-one outlet pipe of cooler two, refrigerant compressor primary outlet cooler are logical
Refrigerant compressor level-one outlet pipe of cooler one is crossed to be connected on plate-fin heat exchanger；The refrigerant compressor level-one is cooling
Device outlet line two is connected in refrigerant compressor secondary inlet liquid separation tank inlet line.
The refrigerant compressor level-one outlet pipe of cooler two is equipped with refrigerant compressor secondary inlet liquid separation tank temperature
Spend control valve.
Be equipped at least five groups of heat exchanger tubes in the plate-fin heat exchanger: natural gas precool heat exchanger pipe, high pressure heat exchange pipe, in
After pressing heat exchanger tube, low pressure heat exchanger tube, cryogen precool heat exchanger pipe, natural gas to be processed to enter the cooling of natural gas precool heat exchanger pipe, into
Enter heavy hydrocarbon liquid separation tank and carry out gas-liquid separation, the gas after separation, which returns to plate-fin heat exchanger, to be continued to cool down, then through natural gas flow
Control valve enters LNG storage tank；
Refrigerant compressor secondary exit port cooler outlet high pressure cryogen enters the high pressure heat exchange pipe heat exchange of plate-fin heat exchanger
Afterwards, into high pressure cryogen throttling set, low pressure heat exchanger tube is returned again to, the azeotrope of low pressure heat transfer tube outlet enters cryogen compression
Then machine level-one entrance liquid separation tank returns to azeotrope compressor；
Refrigerant compressor secondary inlet liquid separation tank exports liquid phase and exports liquid phase by refrigerant compressor secondary inlet liquid separation tank
Pipeline enters the middle pressure heat exchanger tube of plate-fin heat exchanger, subsequently into middle pressure cryogen throttling set, returns to low pressure heat exchanger tube；
Refrigerant compressor primary outlet cooler outlet cryogen enters the cryogen precool heat exchanger pipe heat exchange of plate-fin heat exchanger
Afterwards, into refrigerant compressor secondary inlet liquid separation tank.
The azeotrope compressor is centrifugal compressor or reciprocating compressor, two stages of compression or three stage compression.
Compared with prior art, as follows the characteristics of the utility model:
1) enter after refrigerant compressor primary outlet cooler is cooling from the middle pressure azeotrope that compressor level-one comes out
Plate-fin heat exchanger, by the way that pressure azeotrope goes out the temperature of plate-fin heat exchanger in the pressure or adjusting of pressure azeotrope in control
Degree, so that a part of heavier azeotrope in azeotrope is separated, azeotrope is graded use, saves energy
Consumption.
2) azeotrope pressure is sequentially entered by the gas phase azeotrope that refrigerant compressor secondary inlet liquid separation tank is separated
Contracting machine and refrigerant compressor secondary exit port cooler, azeotrope is single gas phase state after cooling, is directly entered plate-fin and changes
Hot device group, does not set gas-liquid separator between refrigerant compressor secondary exit port cooler and plate-fin heat exchanger group.
3) plate fin heat-exchanging is entered by the low pressure liquid phase azeotrope that refrigerant compressor secondary inlet liquid separation tank is separated
Throttle cooling after device pre-cooling, provides high temperature section cooling capacity to natural gas, refrigerant.
The utility model has the beneficial effects that azeotrope is separated by step by step compression and step by step, by by refrigerant compressor one
Progress gas-liquid separation classification, which uses, after the azeotrope feeding plate-fin heat exchanger that grade exports cooler outlet further cools down mixes
Cryogen is closed, the refrigeration of low pressure azeotrope has been played as much as possible, has reduced the cooling load of high pressure mixing cryogen, is reduced
The power consumption of compressor.The azeotrope of refrigerant compressor secondary exit port cooler outlet is single gas phase state, eliminates two
Grade gas-liquid separator and liquid separation tank bottom pump.
The utility model is with low energy consumption, process is simple, total investment of engineering is low, variable working condition is adaptable, the start-stop range of driving
The features such as sequence is simple.
Detailed description of the invention
Fig. 1 is the device that azeotrope refrigeration carrys out liquefied natural gas,
In figure: azeotrope compressor (1), refrigerant compressor primary outlet cooler (2), refrigerant compressor level-one entrance
Liquid separation tank (6), refrigerant compressor secondary inlet liquid separation tank (3), refrigerant compressor secondary inlet divide liquid tank temperature control valve (12),
Refrigerant compressor secondary exit port cooler (4), heavy hydrocarbon liquid separation tank (10), LNG storage tank (11), natural gas flow control valve (9), in
Pressure cryogen throttling set (7), high pressure cryogen throttling set (8), plate-fin heat exchanger (5), refrigerant compressor level-one cooler go out
Mouth pipeline one (13), refrigerant compressor level-one outlet pipe of cooler two (14), refrigerant compressor secondary inlet liquid separation tank import
Pipeline (15), refrigerant compressor secondary inlet liquid separation tank outlet liquid phase pipeline (16).
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, a kind of device of azeotrope refrigeration liquefying natural gas, including azeotrope compressor 1, cryogen pressure
Contracting machine primary outlet cooler 2, refrigerant compressor secondary inlet liquid separation tank 3,4, one groups of refrigerant compressor secondary exit port cooler
Plate-fin heat exchanger 5, refrigerant compressor level-one entrance liquid separation tank 6, middle pressure cryogen throttling set 7, high pressure cryogen throttling set 8,
Natural gas flow control valve 9, heavy hydrocarbon liquid separation tank 10, LNG storage tank 11, refrigerant compressor secondary inlet divide liquid tank temperature control valve
12；
The refrigerant compressor primary outlet cooler 2, refrigerant compressor secondary inlet liquid separation tank 3, refrigerant compressor
Secondary exit port cooler 4, refrigerant compressor level-one entrance liquid separation tank 6 are connected in azeotrope compressor 1 in parallel and change with plate-fin
Between hot device 5, heavy hydrocarbon liquid separation tank 10, LNG storage tank 11 are connect with plate-fin heat exchanger 5 respectively.
The middle pressure cryogen throttling set 7 is mounted in the outlet of plate-fin heat exchanger 5 and forces down on warm liquid phase pipeline, described
High pressure cryogen throttling set 8 be mounted on plate-fin heat exchanger 5 export high pressure low temperature liquid phase pipeline on, the gas discharge
Control valve 9 is mounted on the pipeline that plate-fin heat exchanger 5 is connect with LNG storage tank 11, refrigerant compressor secondary inlet liquid separation tank temperature
Degree control valve 12 is mounted on the outlet line of refrigerant compressor primary outlet cooler 2.
The azeotrope compressor 1 is in the present embodiment two-stage compressor, and wherein stage compressor outlet comes out
Middle pressure azeotrope enter plate-fin heat exchanger 5 after refrigerant compressor primary outlet cooler 2 is cooling, by being pressed in control
Azeotrope is pressed to go out the temperature of plate-fin heat exchanger 5 in the pressure or adjusting of azeotrope, and through refrigerant compressor secondary inlet
Liquid separation tank inlet line 15 returns to refrigerant compressor secondary inlet liquid separation tank 3, so that a part of heavier mixed in azeotrope
Cryogen is closed to be separated.
The refrigerant compressor secondary inlet liquid separation tank 3 connects three road pipelines: wherein pipeline is that connection mixing is cold all the way
The gaseous phase outlet pipeline of agent compressor and refrigerant compressor secondary inlet liquid separation tank 3, the second road pipeline are connection plate fin heat-exchanging
The refrigerant compressor secondary inlet liquid separation tank of device 5 and refrigerant compressor secondary inlet liquid separation tank exports liquid phase pipeline 16, third road
Pipeline is the refrigerant compressor secondary inlet that 3 entrance of refrigerant compressor secondary inlet liquid separation tank is back to from plate-fin heat exchanger 5
Liquid separation tank inlet line 15.
The outlet line of the refrigerant compressor primary outlet cooler 2 connects two branch lines: refrigerant compressor
Level-one outlet pipe of cooler 1 and refrigerant compressor level-one outlet pipe of cooler 2 14, refrigerant compressor primary outlet is cold
But device 2 is connected on plate-fin heat exchanger 5 by refrigerant compressor level-one outlet pipe of cooler 1；The cryogen compression
Machine level-one outlet pipe of cooler 2 14 is connected in refrigerant compressor secondary inlet liquid separation tank inlet line 15.The cryogen
Compressor level-one outlet pipe of cooler 2 14 is equipped with refrigerant compressor secondary inlet and divides liquid tank temperature control valve 12.
Be equipped at least five groups of heat exchanger tubes in the plate-fin heat exchanger 5: natural gas precool heat exchanger pipe, high pressure heat exchange pipe,
Middle pressure heat exchanger tube, low pressure heat exchanger tube, cryogen precool heat exchanger pipe, after natural gas to be processed enters the cooling of natural gas precool heat exchanger pipe,
Gas-liquid separation is carried out into heavy hydrocarbon liquid separation tank 10, the gas after separation, which returns to plate-fin heat exchanger 5, to be continued to cool down, then through natural
Flow control valves 9 enter LNG storage tank 11；
The high pressure heat exchange pipe that the outlet of refrigerant compressor secondary exit port cooler 4 high pressure cryogen enters plate-fin heat exchanger 5 changes
After heat, into high pressure cryogen throttling set 8, low pressure heat exchanger tube is returned again to, the azeotrope of low pressure heat transfer tube outlet enters cryogen
Then compressor level-one entrance liquid separation tank 6 returns to azeotrope compressor 1；
Refrigerant compressor secondary inlet liquid separation tank 3 exports liquid phase and exports liquid phase by refrigerant compressor secondary inlet liquid separation tank
Pipeline 16 enters the middle pressure heat exchanger tube of plate-fin heat exchanger 5, subsequently into middle pressure cryogen throttling set 7, returns to low pressure heat exchanger tube；
The cryogen precool heat exchanger pipe that the outlet of refrigerant compressor primary outlet cooler 2 cryogen enters plate-fin heat exchanger 5 changes
After heat, into refrigerant compressor secondary inlet liquid separation tank 3.
Azeotrope compression is sequentially entered by the gas phase azeotrope that refrigerant compressor secondary inlet liquid separation tank 3 is separated
Machine and refrigerant compressor secondary exit port cooler 4, azeotrope is single gas phase state after cooling, is directly entered plate fin heat-exchanging
Device 5 does not set gas-liquid separator between refrigerant compressor secondary exit port cooler 4 and plate-fin heat exchanger 5.
When carrying out the device of liquefied natural gas using above-mentioned azeotrope refrigeration, purified natural gas initially enters plate fin heat-exchanging
The natural gas precool heat exchanger pipe of device 5 is pre-chilled, and heavy hydrocarbon liquid separation tank 10 is entered after being cooled to -30 DEG C~-80 DEG C and carries out gas-liquid
Separation, goes successively to plate-fin heat exchanger 5 by the gas phase stream stock isolated at the top of heavy hydrocarbon liquid separation tank 10, and be cooled wherein
To -150 DEG C~-160 DEG C, obtained liquefied natural gas, which is sent into LNG storage tank 11, to be stored.
The azeotrope being made of C1~C5 and N2 is after 6 liquid separation of refrigerant compressor level-one entrance liquid separation tank, gas phase mixing
Cryogen enters the stage compressor of azeotrope compressor 1, and azeotrope is compressed to 900~1100kPaG, and temperature increases
To 95 DEG C or so.Then 30~40 DEG C are cooled to through refrigerant compressor primary outlet cooler 2, into plate-fin heat exchanger 5
The heat exchange of cryogen precool heat exchanger pipe is further cooled to 5~10 DEG C, and the middle pressure azeotrope come out from plate-fin heat exchanger 5 enters
Refrigerant compressor secondary inlet liquid separation tank 3.The liquid phase cryogen that 3 bottom of refrigerant compressor secondary inlet liquid separation tank comes out enters plate wing
The middle pressure heat exchanger tube of formula heat exchanger 5, passed through after being cooled to -40 DEG C in pressure cryogen throttling set 7 (level-one J-T valve) throttling cooling,
Return again to the low pressure heat exchanger tube top sweat cooling of plate-fin heat exchanger 5.It is come out at the top of refrigerant compressor secondary inlet liquid separation tank 3
Gas phase cryogen enter the split-compressor of azeotrope compressor 1, be compressed to 3900~4100kPaG, temperature is increased to
93 DEG C or so, then after refrigerant compressor secondary exit port cooler 4 is cooled to 30~40 DEG C, into plate-fin heat exchanger 5
High pressure heat exchange pipe throttles through high pressure cryogen throttling set 8 (second level J-T valve) after being cooled to -150 DEG C and cools down, returns again to plate wing
The low pressure heat exchange bottom of the tube sweat cooling of formula heat exchanger 5.
Wherein, azeotrope compressor 1 is centrifugal compressor or reciprocating compressor.
Claims (7)
1. a kind of device of azeotrope refrigeration liquefying natural gas, which is characterized in that including azeotrope compressor (1), cryogen
Compressor primary outlet cooler (2), refrigerant compressor secondary inlet liquid separation tank (3), refrigerant compressor secondary exit port cooler
(4), one group of plate-fin heat exchanger (5), refrigerant compressor level-one entrance liquid separation tank (6), heavy hydrocarbon liquid separation tank (10), LNG storage tank
(11)；
The refrigerant compressor primary outlet cooler (2), refrigerant compressor secondary inlet liquid separation tank (3), refrigerant compressor
Secondary exit port cooler (4), refrigerant compressor level-one entrance liquid separation tank (6) are connected in azeotrope compressor (1) and plate in parallel
Between fin heat exchanger (5), heavy hydrocarbon liquid separation tank (10), LNG storage tank (11) are connect with plate-fin heat exchanger (5) respectively.
2. a kind of device of azeotrope refrigeration liquefying natural gas according to claim 1, which is characterized in that the dress
Set further includes middle pressure cryogen throttling set (7), high pressure cryogen throttling set (8), natural gas flow control valve (9), cryogen compression
Machine secondary inlet divides liquid tank temperature control valve (12)；The middle pressure cryogen throttling set (7) is mounted on plate-fin heat exchanger (5)
It is forced down in outlet on warm liquid phase pipeline, the high pressure cryogen throttling set (8) is mounted on plate-fin heat exchanger (5) outlet high pressure
On low temperature liquid phase pipeline, the natural gas flow control valve (9) is mounted on plate-fin heat exchanger (5) and LNG storage tank (11) even
On the pipeline connect, it is cooling that refrigerant compressor secondary inlet divides liquid tank temperature control valve (12) to be mounted on refrigerant compressor primary outlet
On the outlet line of device (2).
3. a kind of device of azeotrope refrigeration liquefying natural gas according to claim 1, which is characterized in that described is cold
Agent compressor secondary inlet liquid separation tank (3) connects three road pipelines: wherein pipeline is connection azeotrope compressor and cryogen all the way
The gaseous phase outlet pipeline of compressor secondary inlet liquid separation tank (3), the second road pipeline are connection plate-fin heat exchanger (5) and cryogen pressure
The refrigerant compressor secondary inlet liquid separation tank of contracting machine secondary inlet liquid separation tank (3) exports liquid phase pipeline (16), and third road pipeline is
The refrigerant compressor secondary inlet point of refrigerant compressor secondary inlet liquid separation tank (3) entrance is back to from plate-fin heat exchanger (5)
Flow container inlet line (15).
4. a kind of device of azeotrope refrigeration liquefying natural gas according to claim 1, which is characterized in that described is cold
The outlet line of agent compressor primary outlet cooler (2) connects two branch lines: refrigerant compressor level-one cooler outlet
Pipeline one (13) and refrigerant compressor level-one outlet pipe of cooler two (14), refrigerant compressor primary outlet cooler (2) are logical
Refrigerant compressor level-one outlet pipe of cooler one (13) is crossed to be connected on plate-fin heat exchanger (5)；The refrigerant compressor
Level-one outlet pipe of cooler two (14) is connected in refrigerant compressor secondary inlet liquid separation tank inlet line (15).
5. a kind of device of azeotrope refrigeration liquefying natural gas according to claim 4, which is characterized in that described is cold
Agent compressor level-one outlet pipe of cooler two (14) is equipped with refrigerant compressor secondary inlet and divides liquid tank temperature control valve (12).
6. a kind of device of azeotrope refrigeration liquefying natural gas according to claim 1, which is characterized in that the plate
At least five groups of heat exchanger tubes: natural gas precool heat exchanger pipe, high pressure heat exchange pipe, middle pressure heat exchanger tube, low pressure are equipped in fin heat exchanger (5)
Heat exchanger tube, cryogen precool heat exchanger pipe, after natural gas to be processed enters the cooling of natural gas precool heat exchanger pipe, into heavy hydrocarbon liquid separation tank
(10) gas-liquid separation is carried out, the gas after separation, which returns to plate-fin heat exchanger (5), to be continued to cool down, and is then controlled through gas discharge
Valve (9) enters LNG storage tank (11)；
The high pressure heat exchange pipe that refrigerant compressor secondary exit port cooler (4) outlet high pressure cryogen enters plate-fin heat exchanger (5) changes
After heat, into high pressure cryogen throttling set (8), low pressure heat exchanger tube is returned again to, the azeotrope of low pressure heat transfer tube outlet enters cold
Agent compressor level-one entrance liquid separation tank (6) then returns to azeotrope compressor (1)；Refrigerant compressor secondary inlet liquid separation tank
(3) outlet liquid phase enters plate-fin heat exchanger (5) by refrigerant compressor secondary inlet liquid separation tank outlet liquid phase pipeline (16)
Middle pressure heat exchanger tube returns to low pressure heat exchanger tube subsequently into middle pressure cryogen throttling set (7)；
The cryogen precool heat exchanger pipe that refrigerant compressor primary outlet cooler (2) outlet cryogen enters plate-fin heat exchanger (5) changes
After heat, into refrigerant compressor secondary inlet liquid separation tank (3).
7. a kind of device of azeotrope refrigeration liquefying natural gas according to claim 1, which is characterized in that described is mixed
Closing refrigerant compressor (1) is centrifugal compressor or reciprocating compressor, two stages of compression or three stage compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909117.5U CN208419376U (en) | 2018-06-12 | 2018-06-12 | A kind of device of azeotrope refrigeration liquefying natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909117.5U CN208419376U (en) | 2018-06-12 | 2018-06-12 | A kind of device of azeotrope refrigeration liquefying natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208419376U true CN208419376U (en) | 2019-01-22 |
Family
ID=65112161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820909117.5U Active CN208419376U (en) | 2018-06-12 | 2018-06-12 | A kind of device of azeotrope refrigeration liquefying natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208419376U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959109A (en) * | 2021-09-28 | 2022-01-21 | 中国石油化工股份有限公司 | Consumption reduction method and system for propylene refrigeration compressor |
-
2018
- 2018-06-12 CN CN201820909117.5U patent/CN208419376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959109A (en) * | 2021-09-28 | 2022-01-21 | 中国石油化工股份有限公司 | Consumption reduction method and system for propylene refrigeration compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7308805B2 (en) | Integrated multiple-loop refrigeration process for gas liquefaction | |
| US7086251B2 (en) | Integrated multiple-loop refrigeration process for gas liquefaction | |
| CA2618576C (en) | Natural gas liquefaction process for lng | |
| CA2864482C (en) | Method and system for liquefying natural gas using single mixed refrigerant and refrigeration medium | |
| CN101608860B (en) | Gas liquefying process for mixed refrigerant and mixed refrigerant | |
| CN110418929B (en) | Apparatus and method for liquefaction of natural gas | |
| JP2003517561A (en) | Natural gas liquefaction by expansion cooling | |
| CN103038587B (en) | Natural Gas Liquefaction Process | |
| CN102492505B (en) | Two-section type single loop mixed refrigerant natural gas liquefaction process and device | |
| CN104513680B (en) | Technology and device for removing hydrogen and nitrogen from methane-rich gas through rectification and producing liquefied natural gas | |
| CN101392983B (en) | Process for liquefying high methane gas | |
| CN103542692B (en) | Based on the Unconventional forage liquefaction system of wrap-round tubular heat exchanger | |
| CN202813975U (en) | Unconventional natural gas liquefaction system based on winding tubular heat exchanger | |
| US20100154469A1 (en) | Process and system for liquefaction of hydrocarbon-rich gas stream utilizing three refrigeration cycles | |
| CN104807287A (en) | Small natural gas liquefaction and refrigeration system and small natural gas liquefaction and refrigeration method | |
| CN208419376U (en) | A kind of device of azeotrope refrigeration liquefying natural gas | |
| CN106016967B (en) | A kind of back-heating type mixed working fluid refrigerant gas liquefaction cycle system | |
| CN107543368B (en) | Residual BOG gas recycling system | |
| CN110627609B (en) | Ethane recovery method combining mixed refrigerant and propane auxiliary refrigeration | |
| CN105371590A (en) | Full-cooling-capacity-recovery natural gas liquefaction process with precooling and mixed refrigeration | |
| CN217442093U (en) | Natural gas ethane recovery device with circulating refrigeration system | |
| RU2795716C1 (en) | Method for liquefying natural gas | |
| CN115371355B (en) | Natural gas liquefaction system and method suitable for standard modularization | |
| CN208567308U (en) | The single cycle natural gas liquefaction device of azeotrope two-way throttling | |
| CN116592575A (en) | Natural gas BOG direct reliquefaction system and method based on nitrogen expansion and throttling refrigeration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |