CN206131510U - A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas - Google Patents
A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas Download PDFInfo
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- CN206131510U CN206131510U CN201621090937.3U CN201621090937U CN206131510U CN 206131510 U CN206131510 U CN 206131510U CN 201621090937 U CN201621090937 U CN 201621090937U CN 206131510 U CN206131510 U CN 206131510U
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- mixing chamber
- suction chamber
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Abstract
The utility model relates to an ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas, its characterized in that: including a spray tube, the one end of spray tube is the entrance point, and the other end is the exit end, the spray tube sets up a suction chamber, a mixing chamber and a diffusion room by the entrance point to the exit end in order, the mixing chamber is a straight pipeline section, the diffusion room is an expansion pipeline, the suction chamber is a shrink pipeline section with the junction of mixing chamber, the entrance point of spray tube sets up the nozzle of suction chamber extension earlier on, the nozzle sets up a contraction section and an expansion section by nozzle inlet to the jet exit in order, one side of suction chamber sets up one and draws and penetrate the pipe.
Description
Technical field
This utility model is related to a kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas, belongs to
Natural gas storage technical field.
Background technology
LNG (Liquefied Natural Gas, liquefied natural gas) receiving station typically carry LNG reception, storage and
The outer transmission function of gasification.As LNG is cryogen, although LNG plant has good insulation, during production run
A certain amount of BOG (Boiled Off Gas, boil-off gas) is produced inevitably, with the increase of BOG quantity, LNG storages
Temperature and pressure in system can be raised.If LNG storage tank internal pressure can be led higher than the safety relief pressure of default
Tank deck relief valve is caused to open, the BOG that directly releases burns to flare system, with the pressure of stabilisation systemss.This large amount of discharge BOG's
Blood pressure lowering mode can cause the huge waste of natural gas.
Therefore, BOG processing systems are one of key issues of necessary emphasis consideration in the LNG receiving stations design phase.At present
LNG receiving stations process the mode of BOG mainly following two：1st, BOG is condensed into LNG and is reclaimed by BOG condensation technologies again,
This needs LNG receiving stations to keep higher outer defeated traffic demand；2nd, 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 is directly entered multi-purpose station pipeline and delivers to downstream user.
Additionally, more and more LNG receiving stations also need the Middle Voltage to short-distance and medium-distance direct in addition to it need to supply to the defeated pipe network of high pressure length
Supply, therefore outer defeated natural gas is divided into high pressure (about 9MPa) for some LNG receiving stations and middle pressure (about 4.0MPa) is conveyed.In
Pressure natural gas often need to can be conveyed after the pressure needed for high pressure is adjusted to.
In prior art, it is to reclaim BOG, pressure, high pressure compressor, after-condenser in the generally setting of LNG receiving stations, and adjust
The equipment such as pressure valve, had both needed energy to need energy that natural gas is adjusted to middle pressure by high pressure to compress BOG, again, caused equipment throwing
The problems such as money height, high energy consumption, cumbersome, complex process, and also there is the application restriction of duty requirements.
The content of the invention
For the problems referred to above, the purpose of this utility model be to provide one kind boil-off gas can be made to condense again and it is simple for structure,
The injector for normal-temperature natural-gas injection low-temperature evaporation gas of process is simple.
For achieving the above object, this utility model is employed the following technical solutions：It is a kind of to liquefy for normal-temperature natural-gas injection
The injector of natural gas in low temperature boil-off gas, it is characterised in that：Including a jet pipe, one end of the jet pipe is entrance point, the other end
For the port of export, the jet pipe is sequentially arranged a suction chamber, a mixing chamber and a diffusion room, the mixing by entrance point to the port of export
Room is a flat segments, and the diffusion room is an expansion pipe, and the suction chamber is a contraction pipeline section with the junction of mixing chamber；
One nozzle extended to suction chamber is set in the entrance point of the jet pipe, the nozzle is sequentially set to jet expansion by nozzle entrance
Put a contraction section and an expansion segment；In the side of the suction chamber, one induction tunnel is set.
The mixing chamber and shrink pipeline section total length be 1080mm, a diameter of 110mm of the mixing chamber, the diffusion
The length of room is 1910mm, and the outlet diameter of the diffusion room is 380mm, and the length of the nozzle is 820mm, the nozzle
A diameter of 30mm of smallest cross-sectional, the outlet diameter of the nozzle is 110mm.
Due to taking above technical scheme, which has advantages below to this utility model：This utility model when in use, LNG
The nozzle that gasification natural gas in receiving station is entered in injector, is ejected to injector after the contraction section and expansion segment of nozzle
Suction chamber, natural gas in the indoor formation low pressure of suction so that BOG is entered suction chamber, natural gas by injection through induction tunnel
It is sufficiently mixed in mixing chamber and diffusion room with the fluid-mixing of BOG, can be gone up in the pressure of diffusion indoor gas,
The pressure loss of whole device is controlled within the scope of receivable；This utility model can realize condensing again for BOG, need not
The equipment such as after-condenser, pressure regulator valve are set, and technical process is simple, economy is projected.
Description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is that size of the present utility model arranges schematic diagram；
Fig. 3 is this utility model internal pressure field distribution cloud atlas.
Specific embodiment
With reference to the accompanying drawings and examples this utility model is described in detail.
As shown in Figure 1 and Figure 2, this utility model includes a jet pipe 1, and one end of jet pipe 1 is entrance point, and the other end is outlet
End, jet pipe 1 are sequentially arranged a suction chamber 2, a mixing chamber 3 and a diffusion room 4 by entrance point to the port of export, wherein, mixing chamber 3 is
One flat segments, diffusion room 4 are an expansion pipe, and suction chamber 2 is a contraction pipeline section with the junction of mixing chamber 3.In jet pipe 1
Entrance point arranges a nozzle 5 extended to suction chamber 2, and nozzle 5 is sequentially arranged a contraction section 51 by nozzle entrance to jet expansion
With an expansion segment 52.In the side of suction chamber 2, an induction tunnel 6 is set.
In a preferred embodiment, mixing chamber 3 and to shrink the total length of pipeline section be 1080mm, the diameter of mixing chamber 3
For 110mm, the length of diffusion room 4 is 1910mm, and the outlet diameter of diffusion room 4 is 380mm, and the length of nozzle 5 is 820mm, is sprayed
A diameter of 30mm of the smallest cross-sectional of mouth 5, the outlet diameter of nozzle 5 is 110mm.Above-mentioned size is arranged and can realize that natural gas draws
Penetrate the technical requirements of the typical condition of BOG.
The course of work of the present utility model and principle are as follows：General Principle of this utility model based on la farr pipe, passes through
Numerical simulation of optimum simultaneously forms a kind of injector suitable for normal-temperature natural-gas injection cryogenic vaporizer, corresponding in two kinds of fluids
Optimal injection rate and liquefied fraction can be reached in pressure and range of flow, is worth with higher factory application.This practicality is new
Type when in use, in LNG receiving stations gasification natural gas enter injector in nozzle 5, through nozzle 5 contraction section 51 and expand
The suction chamber 2 of injector is ejected to after opening section 52, natural gas can be made in suction chamber 2 through the size of the nozzle 5 of particular design
Interior formation low pressure, so that BOG is entered suction chamber 2 by injection through induction tunnel 6.The fluid-mixing of natural gas and BOG is in mixing
It is sufficiently mixed in room 3 and diffusion room 4, the pressure of gas can be gone up in the diffusion room 4, and the pressure of whole device is damaged
System out of control is within the scope of receivable.This utility model can realize condensing again for BOG, need not arrange after-condenser, pressure regulation
The equipment such as valve, technical process is simple, economy is projected.
Effect of the present utility model is illustrated with an instantiation below：
The LNG gasification natural gas supplied materials pressure of certain LNG receiving station is 2.0MPaG, and temperature is 10 DEG C；BOG systems of LNG receiving stations
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.With natural
Gas enters injector, and BOG gases are inhaled into injector and are sufficiently mixed with natural gas outer defeated.The mass ratio of induced-to-inducing air of the device, i.e., by
The mass flow of driving fluid BOG and the ratio of driving fluid quality of natural gas flow, are 69.3%, and receiving station BOG is most
Receiving station BOG maximum hour yield can have been processed when the flow for controlling LNG is 177t/h by yield 112t/h during size
Finish.The outer defeated gas pressure of mixing is 1MPa.
This utility model is only illustrated with above-described embodiment, and the structure of each part, set location and its connection are all can
It is with what is be varied from, on the basis of technical solutions of the utility model, all individual part to be carried out according to this utility model principle
Improvement and equivalents, should not exclude outside protection domain of the present utility model.
Claims (2)
1. a kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas, it is characterised in that：Including a spray
Pipe, one end of the jet pipe is entrance point, and the other end is the port of export, and the 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, the mixing chamber is a flat segments, and the diffusion room is an expansion pipe, the suction
It is one to shrink pipeline section to enter the room with the junction of mixing chamber；In the entrance point of the jet pipe, one nozzle extended to suction chamber is set,
The nozzle is sequentially arranged a contraction section and an expansion segment by nozzle entrance to jet expansion；Arrange in the side of the suction chamber
One induction tunnel.
2. the injector of normal-temperature natural-gas injection LNG cold boil-off gas, its feature are used for as claimed in claim 1
It is：The mixing chamber and shrink pipeline section total length be 1080mm, a diameter of 110mm of the mixing chamber, the diffusion room
Length be 1910mm, the outlet diameter of the diffusion room is 380mm, and the length of the nozzle is 820mm, and the nozzle is most
A diameter of 30mm of small bore, the outlet diameter of the nozzle is 110mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621090937.3U CN206131510U (en) | 2016-09-28 | 2016-09-28 | A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621090937.3U CN206131510U (en) | 2016-09-28 | 2016-09-28 | A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206131510U true CN206131510U (en) | 2017-04-26 |
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ID=58572107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621090937.3U Active CN206131510U (en) | 2016-09-28 | 2016-09-28 | A ejector that is used for normal atmospheric temperature natural gas to draw penetrating liquefied natural gas low temperature evaporation gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206131510U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288478A (en) * | 2016-09-28 | 2017-01-04 | 中国海洋石油总公司 | A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas |
| CN110803288A (en) * | 2019-10-25 | 2020-02-18 | 中航通飞研究院有限公司 | Heating, injecting and mixing device for cabin |
-
2016
- 2016-09-28 CN CN201621090937.3U patent/CN206131510U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288478A (en) * | 2016-09-28 | 2017-01-04 | 中国海洋石油总公司 | A kind of injector for normal-temperature natural-gas injection LNG cold boil-off gas |
| CN110803288A (en) * | 2019-10-25 | 2020-02-18 | 中航通飞研究院有限公司 | Heating, injecting and mixing device for cabin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC Gas & Power Group Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: CNOOC Gas & Power Group Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder |