CN107726729A - A kind of liquefied natural gas condensation method and device again - Google Patents
A kind of liquefied natural gas condensation method and device again Download PDFInfo
- Publication number
- CN107726729A CN107726729A CN201610656334.3A CN201610656334A CN107726729A CN 107726729 A CN107726729 A CN 107726729A CN 201610656334 A CN201610656334 A CN 201610656334A CN 107726729 A CN107726729 A CN 107726729A
- Authority
- CN
- China
- Prior art keywords
- lng
- gas
- bog
- condenser pipe
- pipe
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
- F25J1/0025—Boil-off gases "BOG" from storages
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of liquefied natural gas condensation method and device again.The condensation method again is：BOG from house steward BOG enters horizontal condenser pipe after being mixed after compression with the LNG from LNG low-pressure manifolds, and mixing contact is carried out in the form of multiphase flow through the upset of multiple gas-liquid, condenses recovery BOG, condenses the LNG after recovery BOG and enters surge tank progress gas-liquid separation；Described condensing unit again is mainly made up of horizontal condenser pipe and surge tank, and with being connected in the middle part of surge tank, horizontal condenser pipe is mainly alternately formed by connecting horizontal condenser pipe by gas-liquid turner and condensation straight pipe.This invention simplifies the controlling unit for condensing link again and eliminating complexity of LNG receiving stations technique, security and economic benefit that LNG receiving stations operate are improved.
Description
Technical field
The present invention relates to a kind for the treatment of technology of natural gas vaporization gas (BOG), specifically, is related to a kind of liquefaction day
Right gas (LNG) condensation method and device again.
Background technology
Liquefied natural gas receiving station is the terminal link in LNG industry chain, is received from LNG ship liquefied natural gas and through storage
Deposit, regasify after be conveyed to downstream user, due to the operating of pump, environment leakage heat and unload the displacement of ship time in receiving station's system
Effect, equipment pipe cold insulation etc. can all cause the liquefied natural gas gasifying under extremely low temperature (- 162 DEG C) to produce boil-off gas (BOG).
LNG receiving stations BOG recovery processing techniques mainly include directly compression it is outer it is defeated with LNG is condensed into by after-condenser after
Pressurization, gasification are simultaneously outer defeated, and the directly outer defeated technique of compression needs defeated pipe network outside the supporting low-voltage customer in downstream or low pressure, and domestic
Defeated pipe network is generally high pressure pipe network and lacks related supporting industry outside the downstream of LNG receiving stations, therefore all using condensing work again
Skill handles BOG gases, and foreign countries are also frequently with this technique.
For LNG boil-off gas using when condensing recovery process again, after-condenser is the capital equipment in process system, is entirely being connect
Receive in the operation of station and play the central role taken over from the past and set a new course for the future, its major function is mainly that BOG and LNG provide enough times of contact
Promote BOG to be condensed into LNG with space and ensure the inlet pressure of high-pressure pump as the inlet buffer of LNG high-pressure pumps, then
The Stress control of condenser involves the Collaborative Control of the multi-parameters such as liquid level, pressure, temperature, flow and to ensure high pressure pump inlet
Pressure stability, control mode is complex and control effect is not ideal enough.
The content of the invention
Control mode is complex and the dissatisfactory technical problem of control effect in order to solve existing for prior art, this
Invention provides a kind of liquefied natural gas condensation method and device again.
Condensation method comprises the following steps liquefied natural gas provided by the invention again：
1) horizontal condenser pipe is entered after the BOG from house steward BOG mixes with the LNG from LNG low-pressure manifolds after compression；
2) BOG and LNG entered in horizontal condenser pipe is in horizontal condenser pipe through gas-liquid is overturn with multiphase twice or repeatedly
Manifold formula carries out mixing contact, to promote BOG condensation to reclaim；
3) LNG after condensation recovery BOG enters surge tank progress gas-liquid separation after leaving horizontal condenser pipe, isolates not
Solidifying gas is discharged into house steward BOG, and the LNG after separating fixed gas is discharged by surge tank outlet at bottom.
Present invention also offers a kind of liquefied natural gas after-condenser device, and the device is mainly by horizontal condenser pipe and surge tank
Composition, with being connected in the middle part of surge tank, horizontal condenser pipe is mainly alternately connected horizontal condenser pipe by gas-liquid turner and condensation straight pipe
Form.
The gas-liquid turner is overall in a tubular form, is mainly made up of shell and upset blade, and shell is pipe, overturns blade
It is fixed on inner wall of tube shell.
Described upset blade is in 180 ° of helical forms, and its diameter is equal to shell internal diameter, the seamed edge of upset blade rear and front end
It is parallel to each other, seamed edge length is equal to upset blade diameter, and the strip blade that upset blade is equal to shell internal diameter by width rotates
Formed after 180 °, the state arrangement that upset blade is horizontal in shell with plane where the seamed edge of rear and front end, upset
Blade will divide into two helical channels inside shell.
The shell internal diameter that the length of the upset blade is 2~3 times, gas-liquid turner can use flange with condensation straight pipe
Connection can also use welding manner.
As improved plan, described horizontal condenser pipe porch is provided with entrance expansion tube, entrance expansion tube can
To relax impact of the material to horizontal condenser pipe.
In operation, the BOG from house steward BOG is mixed the device of the present invention with the LNG from LNG low-pressure manifolds after compression
Enter horizontal condenser pipe after conjunction, in horizontal condenser pipe, fluid-mixing fluid (BOG is principal phase) and lower floor fluid (LNG at the middle and upper levels
For principal phase) just inverted after 180 ° of two helical ducts upset of gas-liquid turner respectively, (BOG is top fluid
Principal phase) lower floor is come, lower floor's fluid (LNG is principal phase) comes upper strata, serves the effect for being sufficiently mixed gas-liquid two-phase；Work as BOG
With LNG multiphase flow in condensation straight pipe because Action of Gravity Field recovers after proper flow again by next gas-liquid turner
Upset, is sufficiently mixed gas-liquid two-phase again, and BOG passes through twice with LNG multiphase flow or multiple upset mixes, and BOG is obtained
Arrived it is sufficient condensation recovery, condensation recovery BOG after LNG enter surge tank carry out gas-liquid separation, the fixed gas isolated by
Atmospheric valve at the top of surge tank is discharged into house steward BOG, and the LNG after separating fixed gas is discharged by surge tank outlet at bottom.
Advantages of the present invention is cold again using duct type innovatively to propose a kind of duct type condensation method and device again
Solidifying mode carries out BOG condensation recovery, sets gas-liquid turner in the duct, is overturn by multiple gas-liquid, be BOG and LNG
Provide enough times of contact and space, BOG is sufficiently mixed with LNG, be greatly promoted BOG condensation recovery, by
Level condensation pipe end is that the entrance of LNG high-pressure pumps sets surge tank to ensure that the inlet pressure of LNG high-pressure pumps is stable, is simplified
LNG receiving stations technique condense again link and eliminate complexity controlling unit, improve LNG receiving stations operation security and
Economic benefit.
Brief description of the drawings
Fig. 1 is the structural representation of condensing unit again of the invention；
Fig. 2 is the structural representation of gas-liquid turner in Fig. 1；
Fig. 3 is the structural representation that blade is overturn in Fig. 2；
Fig. 4 is the dimensional structure diagram of Fig. 3 upset blades.
In figure：1- entrance expansion tubes, 2- condensation straight pipes, 3- gas-liquid turners, 4- surge tanks, 5- shells, 6- upset blades,
7- front ends seamed edge, 8- rear ends seamed edge.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Referring to Fig. 1, liquefied natural gas after-condenser device of the invention is mainly by entrance expansion tube 1, condensation straight pipe 2, gas-liquid
Turner 3 and surge tank 4 form, and wherein alternately connection forms horizontal condenser pipe for gas-liquid turner 3 and condensation straight pipe 2, horizontal cold
Solidifying Guan Yiyi sections condensation straight pipe is connected with the middle part of surge tank 4, and gas-liquid turner 3 can be connected with condensation straight pipe 2 using flange
Welding manner can also be used.
Referring to Fig. 2~4, gas-liquid turner is overall in a tubular form, is mainly made up of shell 5 and upset blade 6, and shell 5 is circle
Pipe；Blade 6 is overturn by being fixedly welded on the inwall of shell 5, in 180 ° of helical forms, its diameter is equal to the internal diameter of shell 5, overturns leaf
The front end seamed edge 7 and rear end seamed edge 8 of piece 6 are parallel to each other, and seamed edge length is equal to the upset diameter of blade 6, and upset blade 6 is by width etc.
Formed after the strip blade of shell internal diameter rotates 180 °, upset blade 6 is in shell with front end seamed edge 7 and rear end seamed edge 8
The state arrangement that place plane is horizontal, upset blade 6 will divide into two helical channels inside shell.
During operation, the BOG from house steward BOG is expanding through entrance after being mixed after compression with the LNG from LNG low-pressure manifolds
The cushioning effect of pipe 1 enters horizontal condenser pipe, passes sequentially through the condensation straight pipe 2 being alternately arranged and gas-liquid turner 3, fluid-mixing
Fluid (BOG is principal phase) passes through two helical ducts of gas-liquid turner 3 with lower floor's fluid (LNG is principal phase) respectively at the middle and upper levels
Just inverted after 180 ° of upsets, top fluid (BOG is principal phase) comes lower floor, and lower floor's fluid (LNG is principal phase) is come
Layer, serves the effect for being sufficiently mixed gas-liquid two-phase；BOG passes through twice with LNG multiphase flow or multiple upset mixes, BOG
Sufficient condensation recovery has been obtained, the LNG after recovery BOG has been condensed and carries out gas-liquid separation, the fixed gas isolated into surge tank 4
House steward BOG is discharged into by surge tank top exit, the LNG after separating fixed gas is discharged by surge tank outlet at bottom.
Claims (7)
1. a kind of liquefied natural gas condensation method again, it is characterised in that comprise the following steps：
1) horizontal condenser pipe is entered after the BOG from house steward BOG mixes with the LNG from LNG low-pressure manifolds after compression；
2) overturn into the BOG in horizontal condenser pipe and LNG in horizontal condenser pipe through obtaining multiple gas-liquid twice with multiphase manifold
Formula carries out mixing contact, to promote BOG condensation to reclaim；
3) LNG after condensation recovery BOG enters surge tank progress gas-liquid separation, the fixed gas isolated after leaving horizontal condenser pipe
House steward BOG is discharged into, the LNG after separating fixed gas is discharged by surge tank outlet at bottom.
A kind of 2. liquefied natural gas after-condenser device, it is characterised in that：Mainly it is made up of horizontal condenser pipe and surge tank, it is horizontal cold
With being connected in the middle part of surge tank, horizontal condenser pipe is mainly alternately formed by connecting solidifying pipe by gas-liquid turner and condensation straight pipe.
3. device according to claim 2, it is characterised in that：The gas-liquid turner is overall in a tubular form, mainly by shell
With upset blade composition, shell is pipe, and upset blade is fixed on inner wall of tube shell.
4. device according to claim 3, it is characterised in that：The upset blade is in 180 ° of helical forms, and its diameter is equal to
Shell internal diameter, the seamed edge of upset blade rear and front end are parallel to each other, and seamed edge length is equal to upset blade diameter, and upset blade is by width
Degree is formed after rotating 180 ° equal to the strip blade of shell internal diameter, and upset blade is in shell with flat where the seamed edge of rear and front end
The state arrangement that face is horizontal, upset blade will divide into two helical channels inside shell.
5. the device according to claim 3 or 4, it is characterised in that：The shell that the length of the upset blade is 2~3 times
Internal diameter.
6. device according to claim 2, it is characterised in that：The gas-liquid turner is connected with condensation straight pipe using flange
Or using welding manner.
7. device according to claim 2, it is characterised in that：It is expanding that the horizontal condenser pipe porch is provided with entrance
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610656334.3A CN107726729A (en) | 2016-08-11 | 2016-08-11 | A kind of liquefied natural gas condensation method and device again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610656334.3A CN107726729A (en) | 2016-08-11 | 2016-08-11 | A kind of liquefied natural gas condensation method and device again |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107726729A true CN107726729A (en) | 2018-02-23 |
Family
ID=61199581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610656334.3A Pending CN107726729A (en) | 2016-08-11 | 2016-08-11 | A kind of liquefied natural gas condensation method and device again |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107726729A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115282744A (en) * | 2022-08-04 | 2022-11-04 | 合肥科安设备安装有限公司 | Natural gas recovery device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971197A (en) * | 2005-11-23 | 2007-05-30 | 三星电子株式会社 | Piping for heat exchanger and refrigerating system using same |
| CN101881549A (en) * | 2010-06-25 | 2010-11-10 | 华南理工大学 | Re-condensation reclaiming system for evaporated gas of liquefied natural gas receiving station and reclaiming method thereof |
| CN104034122A (en) * | 2013-03-04 | 2014-09-10 | 中国石化工程建设有限公司 | System and method for re-condensing boil off gas (BOG) of liquefied natural gas |
| CN104321581A (en) * | 2011-12-02 | 2015-01-28 | 氟石科技公司 | LNG boiloff gas recondensation configurations and methods |
| CN104913196A (en) * | 2015-07-07 | 2015-09-16 | 中国海洋石油总公司 | BOG (boil-off gas) treatment process and device under normal operation condition of LNG (liquefied natural gas) receiving station |
| CN205027154U (en) * | 2015-09-22 | 2016-02-10 | 江苏中圣压力容器装备制造有限公司 | Novel flash distillation vapour aftercooling congeals heat exchanger |
-
2016
- 2016-08-11 CN CN201610656334.3A patent/CN107726729A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971197A (en) * | 2005-11-23 | 2007-05-30 | 三星电子株式会社 | Piping for heat exchanger and refrigerating system using same |
| CN101881549A (en) * | 2010-06-25 | 2010-11-10 | 华南理工大学 | Re-condensation reclaiming system for evaporated gas of liquefied natural gas receiving station and reclaiming method thereof |
| CN104321581A (en) * | 2011-12-02 | 2015-01-28 | 氟石科技公司 | LNG boiloff gas recondensation configurations and methods |
| CN104034122A (en) * | 2013-03-04 | 2014-09-10 | 中国石化工程建设有限公司 | System and method for re-condensing boil off gas (BOG) of liquefied natural gas |
| CN104034122B (en) * | 2013-03-04 | 2016-02-10 | 中国石化工程建设有限公司 | A kind of natural gas vaporization gas condenser system and method again |
| CN104913196A (en) * | 2015-07-07 | 2015-09-16 | 中国海洋石油总公司 | BOG (boil-off gas) treatment process and device under normal operation condition of LNG (liquefied natural gas) receiving station |
| CN205027154U (en) * | 2015-09-22 | 2016-02-10 | 江苏中圣压力容器装备制造有限公司 | Novel flash distillation vapour aftercooling congeals heat exchanger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115282744A (en) * | 2022-08-04 | 2022-11-04 | 合肥科安设备安装有限公司 | Natural gas recovery device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104390136B (en) | BOG recovering method | |
| US11125391B2 (en) | Process and method for transporting liquid hydrocarbon and CO2 for producing hydrogen with CO2 capture | |
| CN101703841B (en) | Device for collecting and recovering oil gas by condensation and absorption | |
| CN107726729A (en) | A kind of liquefied natural gas condensation method and device again | |
| CN107726730A (en) | A kind of vertical liquefied natural gas after-condenser | |
| CN107676623A (en) | A kind of differential LNG loading systems | |
| CN107641535A (en) | Film deep cooling integrated separation purifies the device and method of multiple gases | |
| CN209702668U (en) | A kind of gas recovery system for oil | |
| CN102923731B (en) | Utilizing device and method for cold energy in high-purity ammonia preparation process | |
| CN210663576U (en) | Air separation device for preparing high-purity oxygen and nitrogen by utilizing LNG cold energy | |
| CN107883672A (en) | A kind of vertical liquefied natural gas after-condenser device | |
| CN104329561B (en) | A kind of system of liquid nitrogen LNG Liquefied natural gas and method thereof | |
| CN203144363U (en) | System for recycling gas below standard in LNG (liquefied natural gas) production | |
| CN201819200U (en) | Recovering system for steam condensing water | |
| CN208859995U (en) | A kind of device preparing liquid oxygen using low temperature liquid nitrogen | |
| CN207362103U (en) | The preparation facilities of high-purity octafluorocyclobutane | |
| CN204227028U (en) | A kind of system of liquid nitrogen LNG Liquefied natural gas | |
| RU2294430C1 (en) | Method for gaseous hydrocarbon preparation for transportation | |
| CN217736919U (en) | Hydrogen transfer pressurization dehumidification device for hydrogenation station | |
| CN115790077A (en) | Device for preparing high-purity nitrogen and ultra-pure oxygen and using method thereof | |
| CN207243856U (en) | A kind of complete set of equipments of liquefied natural gas and ethanol extraction essential oil | |
| CN219526270U (en) | Ammonia recovery device by cooling method | |
| CN102249196A (en) | Novel medical oxygen generator | |
| CN109253390B (en) | A kind of BOG recovery and processing system and treatment process | |
| US11117070B2 (en) | Vapor recovery system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180223 |