CN106288478A - A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas - Google Patents
A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas Download PDFInfo
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- CN106288478A CN106288478A CN201610860272.8A CN201610860272A CN106288478A CN 106288478 A CN106288478 A CN 106288478A CN 201610860272 A CN201610860272 A CN 201610860272A CN 106288478 A CN106288478 A CN 106288478A
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- nozzle
- gas
- mixing chamber
- injector
- expansion
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Classifications
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- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to a kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas, it is characterized in that: include a jet pipe, one end of described jet pipe is entrance point, the other end is the port of export, described jet pipe is sequentially arranged a suction chamber, a mixing chamber and a diffusion room by entrance point to the port of export, described mixing chamber is a flat segments, and described diffusion room is an expansion pipe, and described suction chamber is a contraction pipeline section with the junction of mixing chamber；Entrance point at described jet pipe arranges a nozzle extended to suction chamber, and described nozzle is sequentially arranged a contraction section and an expansion segment by nozzle entrance to jet expansion；In the side of described suction chamber, one induction tunnel is set.
Description
Technical field
The present invention relates to a kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas, belong to natural
Gas technical field of memory.
Background technology
LNG (Liquefied Natural Gas, liquefied natural gas) receiving station typically carry the reception of LNG, storage and
Gasify outer transmission function.Owing to LNG is cryogen, although LNG plant has good insulation, but during production run
Inevitably producing a certain amount of BOG (Boiled Off Gas, boil-off gas), along with the increase of BOG quantity, LNG stores
Intrasystem temperature and pressure can raise.If LNG storage tank internal pressure is higher than the safety relief pressure of default, then can lead
Causing tank deck relief valve to open, the BOG that directly releases burns to flare system, with the pressure of stabilisation systems.This large amount of discharge BOG's
Blood pressure lowering mode can cause the huge waste of natural gas.
Therefore, one of key issue that during BOG processing system is the LNG receiving station design phase, necessary emphasis considers.At present
LNG receiving station processes the mode of BOG mainly a following two: 1, BOG condensation technology again, BOG is condensed into LNG and reclaims,
This needs the outer defeated traffic demand that the holding of LNG receiving station is higher；2, direct compress technique, the BOG in LNG storage tank is through low pressure pressure
After contracting machine and high pressure compressor are pressurized to the pressure needed for pipe network transmission successively, it are directly entered multi-purpose station pipeline and deliver to downstream user.
Additionally, more and more LNG receiving stations are except need to also need to the Middle Voltage of short-distance and medium-distance direct in addition to the defeated pipe network of high pressure length supplies
Supply, therefore outer defeated natural gas is divided into high pressure (about 9MPa) and middle pressure (about 4.0MPa) to carry by some LNG receiving stations.In
Pressure natural gas often can need to carry after being adjusted to required pressure by high pressure.
In prior art, middle pressure, high pressure compressor, after-condenser are generally set for reclaiming BOG, LNG receiving station, and adjust
The equipment such as pressure valve, had both needed energy to compress BOG, and had needed again energy that by high pressure, natural gas is adjusted to middle pressure, and the equipment that causes is thrown
The problems such as money height, energy consumption height, complex operation, complex process, and there is also the application restriction of duty requirements.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide one and boil-off gas can be made to condense and simple for structure, technique again
It is simply to the injector of normal-temperature natural-gas injection low-temperature evaporation gas.
For achieving the above object, the present invention is by the following technical solutions: a kind of natural for the liquefaction of normal-temperature natural-gas injection
The injector of gas low-temperature evaporation gas, it is characterised in that: including that a jet pipe, one end of described jet pipe are entrance point, the other end is for going out
Mouth end, described jet pipe is sequentially arranged a suction chamber, a mixing chamber and a diffusion room by entrance point to the port of export, and described mixing chamber is
One flat segments, described diffusion room is an expansion pipe, and described suction chamber is a contraction pipeline section with the junction of mixing chamber；Institute
The entrance point stating jet pipe arranges a nozzle extended to suction chamber, and described nozzle is sequentially arranged one by nozzle entrance to jet expansion
Contraction section and an expansion segment；In the side of described suction chamber, one induction tunnel is set.
Described mixing chamber and the total length shrinking pipeline section are 1080mm, a diameter of 110mm of described mixing chamber, described diffusion
The a length of 1910mm of room, the outlet diameter of described diffusion room is 380mm, a length of 820mm of described nozzle, described nozzle
A diameter of 30mm of smallest cross-sectional, the outlet diameter of described nozzle is 110mm.
Due to the fact that and take above technical scheme, it has the advantage that the present invention in use, in LNG receiving station
Gasification natural gas enter the nozzle in injector, after the contraction section and expansion segment of nozzle, be ejected to the suction of injector
Room, natural gas forms low pressure in suction chamber, so that BOG is entered suction chamber, natural gas and BOG through induction tunnel by injection
Fluid-mixing is sufficiently mixed at mixing chamber and diffusion indoor, and the pressure at diffusion indoor gas can be gone up, by whole
The pressure loss of device controls within the scope of receivable；The present invention is capable of condensing again of BOG, it is not necessary to arranges and condenses
The equipment such as device, pressure regulator valve, technical process is simple, economy is prominent.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is that the size of the present invention arranges schematic diagram；
Fig. 3 is internal pressure field distribution cloud atlas of the present invention.
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, the present invention includes a jet pipe 1, and one end of jet pipe 1 is entrance point, and the other end is the port of export, spray
Pipe 1 is sequentially arranged suction chamber 2, mixing chamber 3 and a diffusion room 4 by entrance point to the port of export, and wherein, mixing chamber 3 is one flat
Straight length, diffusion room 4 is an expansion pipe, and suction chamber 2 is a contraction pipeline section with the junction of mixing chamber 3.Import at jet pipe 1
End arranges a nozzle 5 extended to suction chamber 2, and nozzle 5 is sequentially arranged a contraction section 51 and by nozzle entrance to jet expansion
Expansion segment 52.One induction tunnel 6 is set in the side of suction chamber 2.
In a preferred embodiment, mixing chamber 3 and the total length shrinking pipeline section are 1080mm, the diameter of mixing chamber 3
For 110mm, a length of 1910mm of diffusion room 4, the outlet diameter of diffusion room 4 is 380mm, a length of 820mm of nozzle 5, spray
A diameter of 30mm of the smallest cross-sectional of mouth 5, the outlet diameter of nozzle 5 is 110mm.The setting of above-mentioned size is capable of natural gas and draws
Penetrate the technology requirement of the typical condition of BOG.
Work process and the principle of the present invention are as follows: present invention General Principle based on la farr pipe, pass through numerical simulation
Optimize and formed a kind of injector being applicable to normal-temperature natural-gas injection cryogenic vaporizer, at pressure corresponding to two kinds of fluids and stream
Optimal injection rate and liquefied fraction can be reached in weight range, there is higher factory application and be worth.The present invention in use,
Gasification natural gas in LNG receiving station enters the nozzle 5 in injector, sprays after the contraction section 51 and expansion segment 52 of nozzle 5
Going out the suction chamber 2 to injector, the size through the nozzle 5 of particular design can make natural gas form low pressure in suction chamber 2,
So that BOG is entered suction chamber 2 through induction tunnel 6 by injection.The fluid-mixing of natural gas and BOG is in mixing chamber 3 and diffusion room 4
Inside being sufficiently mixed, in diffusion room 4, the pressure of gas can be gone up, and controls the pressure loss of whole device to connect
Within the scope of receipts.The present invention is capable of condensing again of BOG, it is not necessary to arrange the equipment such as after-condenser, pressure regulator valve, technical process
Simply, economy highlights.
Below with the effect of an instantiation explanation present invention:
The LNG gasification natural gas supplied materials pressure of certain LNG receiving station is 2.0MPaG, and temperature is 10 DEG C；BOG system of LNG receiving station
The BOG of system pressure after compression reaches 0.8MPaG, and temperature is-140 DEG C, and BOG connects the induction tunnel 6 of injector.Along with natural
Gas enters injector, and BOG gas is inhaled into injector and is sufficiently mixed outer defeated with natural gas.The mass ratio of induced-to-inducing air of this device, i.e. by
The ratio of the mass flow of driving fluid BOG and driving fluid quality of natural gas flow, is 69.3%, and this receiving station BOG is
Generation amount 112t/h during size, can process maximum for a receiving station BOG hour generation amount when flow of control LNG is 177t/h
Finish.The outer defeated gas pressure of mixing is 1MPa.
The present invention only illustrates with above-described embodiment, the structure of each parts, arranges position and to connect be all to have
Changed, on the basis of technical solution of the present invention, all improvement individual part carried out according to the principle of the invention and equivalent
Conversion, the most should not get rid of outside protection scope of the present invention.
Claims (2)
1. the injector for normal-temperature natural-gas injection LNG cold boil-off gas, it is characterised in that: include a spray
Pipe, one end of described jet pipe is entrance point, and the other end is the port of export, and described jet pipe is sequentially arranged a suction by entrance point to the port of export
Enter the room, a mixing chamber and a diffusion room, described mixing chamber is a flat segments, and described diffusion room is an expansion pipe, described suction
The junction with mixing chamber of entering the room is a contraction pipeline section；Entrance point at described jet pipe arranges a nozzle extended to suction chamber,
Described nozzle is sequentially arranged a contraction section and an expansion segment by nozzle entrance to jet expansion；Arrange in the side of described suction chamber
One induction tunnel.
A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas, its
It is characterised by: described mixing chamber and the total length shrinking pipeline section are 1080mm, a diameter of 110mm of described mixing chamber, described expansion
The a length of 1910mm of pressure chamber, the outlet diameter of described diffusion room is 380mm, a length of 820mm of described nozzle, described nozzle
A diameter of 30mm of smallest cross-sectional, the outlet diameter of described nozzle is 110mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860272.8A CN106288478A (en) | 2016-09-28 | 2016-09-28 | A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860272.8A CN106288478A (en) | 2016-09-28 | 2016-09-28 | A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106288478A true CN106288478A (en) | 2017-01-04 |
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ID=57716197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610860272.8A Pending CN106288478A (en) | 2016-09-28 | 2016-09-28 | A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas |
Country Status (1)
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999035436A1 (en) * | 1998-01-08 | 1999-07-15 | Bg Plc | A method of and apparatus for returning a boil-off gas to its liquid phase |
| CN2494917Y (en) * | 2001-08-09 | 2002-06-12 | 上海工程技术大学 | Peak regulator for natural gas |
| JP2003277778A (en) * | 2002-03-25 | 2003-10-02 | Mitsui Eng & Shipbuild Co Ltd | Method and apparatus for manufacturing natural gas hydrate |
| CN102954667A (en) * | 2011-08-11 | 2013-03-06 | 林德股份公司 | Method for compacting boil off gas |
| CN103225740A (en) * | 2013-04-22 | 2013-07-31 | 中国海洋石油总公司 | BOG processing system utilizing pressure energy of LNG receiving station |
| WO2016017973A1 (en) * | 2014-07-31 | 2016-02-04 | 대우조선해양 주식회사 | System and method for supplying fuel |
| CN205156507U (en) * | 2015-11-23 | 2016-04-13 | 重庆耐德工业股份有限公司 | BOG is equipment of liquefying again |
| CN206131510U (en) * | 2016-09-28 | 2017-04-26 | 中国海洋石油总公司 | A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas |
-
2016
- 2016-09-28 CN CN201610860272.8A patent/CN106288478A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999035436A1 (en) * | 1998-01-08 | 1999-07-15 | Bg Plc | A method of and apparatus for returning a boil-off gas to its liquid phase |
| CN2494917Y (en) * | 2001-08-09 | 2002-06-12 | 上海工程技术大学 | Peak regulator for natural gas |
| JP2003277778A (en) * | 2002-03-25 | 2003-10-02 | Mitsui Eng & Shipbuild Co Ltd | Method and apparatus for manufacturing natural gas hydrate |
| CN102954667A (en) * | 2011-08-11 | 2013-03-06 | 林德股份公司 | Method for compacting boil off gas |
| CN103225740A (en) * | 2013-04-22 | 2013-07-31 | 中国海洋石油总公司 | BOG processing system utilizing pressure energy of LNG receiving station |
| WO2016017973A1 (en) * | 2014-07-31 | 2016-02-04 | 대우조선해양 주식회사 | System and method for supplying fuel |
| CN205156507U (en) * | 2015-11-23 | 2016-04-13 | 重庆耐德工业股份有限公司 | BOG is equipment of liquefying again |
| CN206131510U (en) * | 2016-09-28 | 2017-04-26 | 中国海洋石油总公司 | A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: CHINA NATIONAL OFFSHORE OIL Corp. Applicant after: Cnooc Gas & Power Group Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: CHINA NATIONAL OFFSHORE OIL Corp. Applicant before: CNOOC Gas & Power Group |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |