CN205026383U - Liquefied natural gas that takes centrifugal pump device of unloading - Google Patents
Liquefied natural gas that takes centrifugal pump device of unloading Download PDFInfo
- Publication number
- CN205026383U CN205026383U CN201520712825.6U CN201520712825U CN205026383U CN 205026383 U CN205026383 U CN 205026383U CN 201520712825 U CN201520712825 U CN 201520712825U CN 205026383 U CN205026383 U CN 205026383U
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- CN
- China
- Prior art keywords
- centrifugal pump
- low temperature
- pipeline
- valve
- bog
- 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.)
- Expired - Fee Related
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a liquefied natural gas that takes centrifugal pump device of unloading, the centrifugal pump system of unloading, nitrogen gas replacement system and BOG on equipment base and equipment base discharge recovery system, and the centrifugal pump system of unloading includes the pipeline concatenated between inlet and liquid outlet low temperature quick action emergency valve a, low temperature centrifugal pump, low temperature check valve an and low temperature quick action emergency valve b, nitrogen gas replacement system includes nitrogen gas import and the low temperature check valve b and the stop valve b that concatenate in proper order, BOG discharges recovery system including the first via pipeline that concatenates low temperature check valve c and stop valve c, connect low temperature quick action emergency valve c's second pipeline and connection stop valve d's third pipeline. The utility model discloses a skid - mounted structure collects that the centrifugal pump is unloaded, BOG retrieves, safe diffusing in an organic whole, compact structure, and the investment cost is low, strong adaptability, user convenient to use.
Description
Technical field
The utility model belongs to liquefied natural gas facility technical field, specifically a kind of LNG Liquefied natural gas unloading unit with centrifugal pump.
Background technique
What current LNG Liquefied natural gas unloading system generally adopted is the mode that pressurized machine is unloaded, and only there are supercharging liquid pipe, supercharging gas phase pipeline and function of increasing pressure in unloading unit inside.The major defect wherein existed is, pressurization can cause the temperature of LNG Liquefied natural gas higher, but pressure is lower, is unfavorable for storage and the use in downstream.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and proposes a kind of LNG Liquefied natural gas unloading unit with centrifugal pump.
The utility model solves its technical problem and takes following technological scheme to realize:
With a LNG Liquefied natural gas unloading unit for centrifugal pump, comprise steel rectangular sheet material plant bottom case, plant bottom case be installed with centrifugal pump unloading system, nitrogen replacing system and BOG and discharge reclaiming system,
Wherein, centrifugal pump unloading system comprises the liquid entering hole on the left of system and the liquid outlet on the right side of system further, between liquid entering hole and liquid outlet, be serially connected with low temperature Emergeny Cutoff Valves a, low-temperature centrifugal pump, low temperature safety check a and low temperature Emergeny Cutoff Valves b successively by pipeline, the pipeline between centrifugal pump and low temperature safety check a is provided with thermometer, temperature transmitter, pressure gauge, pressure transmitter and safety valve successively;
Wherein, nitrogen replacing system comprise nitrogen inlet on the left of system, by nitrogen inlet, be connected in series low temperature safety check b and stop valve b successively by pipeline after pipe end be connected on the outlet conduit of low temperature Emergeny Cutoff Valves a;
Wherein, BOG discharges reclaiming system and comprises BOG discharge recovery port further, discharges the corresponding three-way connection (pipe) road of recovery port by BOG, is connected on the inlet pipeline of low-temperature centrifugal pump after first via pipeline serial connection low temperature safety check c and stop valve c; Second road pipeline is connected on the outlet conduit of low-temperature centrifugal pump after connecting low temperature Emergeny Cutoff Valves c; Three-way connection (pipe) road is connected on the outlet conduit of low temperature safety check a after connecting stop valve d.
And, between liquid entering hole and liquid outlet, be parallel with the bypass cryogenic globe valve a that pipeline connects.
And the model that described stop valve adopts is DJ61F-40P, and diameter is between 32mm-50mm; Safety valve model is DA21F-40P, and diameter is 15mm; Centrifugal pump model is 13m
3/ h.
Advantage of the present utility model and good effect are:
The utility model adopts skid structure, and integrate that centrifugal pump is unloaded, flash steam BOG (BoilOffGas) reclaims, to diffuse safely, compact structure, investment cost is low, strong adaptability, and user is easy to use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Implement to be further described to the utility model below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
A kind of LNG Liquefied natural gas unloading unit with centrifugal pump, as shown in Figure 1, comprise steel rectangular sheet material plant bottom case 2, plant bottom case is installed with centrifugal pump unloading system, nitrogen replacing system and BOG (BoilOffGas) and discharges reclaiming system
Wherein, centrifugal pump unloading system comprises the liquid entering hole 4 on the left of system and the liquid outlet 21 on the right side of system further, between liquid entering hole and liquid outlet, be serially connected with low temperature Emergeny Cutoff Valves a3, low-temperature centrifugal pump 10, low temperature safety check a12 and low temperature Emergeny Cutoff Valves b20 successively by pipeline, the pipeline between centrifugal pump and low temperature safety check a be provided with successively, thermometer 13, temperature transmitter 14, pressure gauge 15, pressure transmitter 16 and safety valve 18;
Wherein, nitrogen replacing system comprise nitrogen inlet 5 on the left of system, by nitrogen inlet, be connected in series low temperature safety check b7 and stop valve b6 successively by pipeline after pipe end be connected on the pipeline between low temperature Emergeny Cutoff Valves a and low-temperature centrifugal pump;
Wherein, BOG discharges reclaiming system and comprises BOG discharge recovery port 19 further, discharges the corresponding three-way connection (pipe) road of recovery port by BOG, is connected on the inlet pipeline of low-temperature centrifugal pump after first via pipeline serial connection low temperature safety check c9 and stop valve c8; Second road pipeline is connected on the outlet conduit of low-temperature centrifugal pump after connecting low temperature Emergeny Cutoff Valves c11; Three-way connection (pipe) road is connected on the outlet conduit of low temperature safety check a after connecting stop valve d17.
In concrete enforcement of the present utility model, between liquid entering hole and liquid outlet, be parallel with the bypass cryogenic globe valve a1 that pipeline connects.
In concrete enforcement of the present utility model, the model that described stop valve adopts is DJ61F-40P, and diameter is between 32mm-50mm; Safety valve model is DA21F-40P, and diameter is 15mm; Centrifugal pump model is 13m
3/ h.
Working principle of the present utility model
Use front preparation, now connect electric inlet pipeline, open cryogenic globe valve b, the pipeline of system is carried out nitrogen displacement work.
Unload the stage, now connect that centrifugal pump is imported and exported pipeline, opened low temperature Emergeny Cutoff Valves a, low temperature Emergeny Cutoff Valves b successively, low temperature Emergeny Cutoff Valves c, other valve are in closed condition, close low temperature Emergeny Cutoff Valves c when being full of LNG Liquefied natural gas in system completely and now open low-temperature centrifugal pump, LNG Liquefied natural gas flow into liquid in the pipe network of downstream by low-temperature centrifugal pump.
Whole device arranges safety valve, and when pipeline loine pressure reaches setting value, release opened by safety valve, ensures security of system.
Claims (3)
1. the LNG Liquefied natural gas unloading unit with centrifugal pump, is characterized in that: comprise steel rectangular sheet material plant bottom case, plant bottom case is installed with centrifugal pump unloading system, nitrogen replacing system and BOG and discharges reclaiming system,
Wherein, centrifugal pump unloading system comprises the liquid entering hole on the left of system and the liquid outlet on the right side of system further, between liquid entering hole and liquid outlet, be serially connected with low temperature Emergeny Cutoff Valves a, low-temperature centrifugal pump, low temperature safety check a and low temperature Emergeny Cutoff Valves b successively by pipeline, the pipeline between centrifugal pump and low temperature safety check a is provided with thermometer, temperature transmitter, pressure gauge, pressure transmitter and safety valve successively;
Wherein, nitrogen replacing system comprise nitrogen inlet on the left of system, by nitrogen inlet, be connected in series low temperature safety check b and stop valve b successively by pipeline after pipe end be connected on the outlet conduit of low temperature Emergeny Cutoff Valves a;
Wherein, BOG discharges reclaiming system and comprises BOG discharge recovery port further, discharges the corresponding three-way connection (pipe) road of recovery port by BOG, is connected on the inlet pipeline of low-temperature centrifugal pump after first via pipeline serial connection low temperature safety check c and stop valve c; Second road pipeline is connected on the outlet conduit of low-temperature centrifugal pump after connecting low temperature Emergeny Cutoff Valves c; Three-way connection (pipe) road is connected on the outlet conduit of low temperature safety check a after connecting stop valve d.
2. the LNG Liquefied natural gas unloading unit of band centrifugal pump according to claim 1, is characterized in that: between liquid entering hole and liquid outlet, be parallel with the bypass cryogenic globe valve a that pipeline connects.
3. the LNG Liquefied natural gas unloading unit of band centrifugal pump according to claim 1, is characterized in that: the model that described stop valve adopts is DJ61F-40P, and diameter is between 32mm-50mm; Safety valve model is DA21F-40P, and diameter is 15mm; Centrifugal pump model is 13m
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520712825.6U CN205026383U (en) | 2015-09-15 | 2015-09-15 | Liquefied natural gas that takes centrifugal pump device of unloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520712825.6U CN205026383U (en) | 2015-09-15 | 2015-09-15 | Liquefied natural gas that takes centrifugal pump device of unloading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205026383U true CN205026383U (en) | 2016-02-10 |
Family
ID=55258913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520712825.6U Expired - Fee Related CN205026383U (en) | 2015-09-15 | 2015-09-15 | Liquefied natural gas that takes centrifugal pump device of unloading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205026383U (en) |
-
2015
- 2015-09-15 CN CN201520712825.6U patent/CN205026383U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160210 Termination date: 20160915 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |