CN206637256U - One kind injection drainage type evaporated natural gas retracting device - Google Patents
One kind injection drainage type evaporated natural gas retracting device Download PDFInfo
- Publication number
- CN206637256U CN206637256U CN201620955679.4U CN201620955679U CN206637256U CN 206637256 U CN206637256 U CN 206637256U CN 201620955679 U CN201620955679 U CN 201620955679U CN 206637256 U CN206637256 U CN 206637256U
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- natural gas
- butterfly valve
- bog
- road
- injection
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- Expired - Fee Related
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A kind of natural gas recycling device is the utility model is related to, more particularly to a kind of injection drainage type evaporated natural gas retracting device.Described is provided with pressure sensor on evaporated natural gas house steward, after compressor comes out, enters condenser system again all the way, another way is connected on injection flow diverter, and check valve and drainage air-flow gauge are provided with this road pipeline；Described gasifier exit is directly connected to the outer defeated pipeline of metering all the way, and main road Double position butterfly valve is provided with this road, and another way is connected to injection flow diverter, installation bypass Double position butterfly valve on this road, and the outlet for spraying flow diverter is connected to the outer defeated pipeline of metering.Defeated flow is relatively low outside, BOG again condenser system can not all condense station in produce BOG in the case of, unnecessary BOG can be directly recycled to defeated pipe network outside natural gas, it is simple in construction.
Description
Technical field
A kind of natural gas recycling device is the utility model is related to, more particularly to a kind of injection drainage type evaporated natural gas recovery
Device.
Background technology
Because reason, the LNG receiving stations such as heat-insulation layer leakage heat, equipment operation heat production persistently produce evaporated natural gas (BOG), made
Rise into storage tank and BOG manifold pressures.
Mainly there are two kinds of recovery BOG mode in LNG receiving stations at present：First method is BOG recondensation process, and its is main
Mode is that mass-and heat-transfer is mixed in after-condenser with the BOG gases after BOG compressor boosts using pump discharge LNG in tank, is reached
To condensation BOG purpose, condensed liquid phase is further pressurized by high-pressure pump, into gasifier gasification outside it is defeated.This method
Process energy consumption is low, is widely used in domestic and international each receiving station.Condenser system handles the ability of BOG gases by outer defeated stream to BOG again
The limitation of amount, as the reduction of outer defeated flow, then condenser system BOG effective treating capacities decline.When defeated flow is relatively low outside, BOG
Compressor outlet evaporated natural gas can not generally be got off by the technique total condensation, to maintain system stable operation, it is necessary to drop
Low BOG compressor loads.Control BOG compressor loads are to adjust the important means of BOG manifold pressures, if BOG compressors are handled
Amount, less than receiving station's BOG yields, LNG storage tank and BOG manifold pressures will rise, and need discharge torch to enter more than design pressure
Row pressure release, both waste of resource, polluted environment again.
Second method is the outer defeated technique of direct compression, and its major way is that BOG gases directly are passed through into BOG compressor pressures
After contracting, enter back into high pressure compressor and carry out second compression again, its pressure is reached defeated ductwork pressure outside receiving station, it is then that BOG is defeated
Deliver to outside high pressure in defeated pipe network.This method equipment initial investment is big, and operation energy consumption is high, handles BOG's generally as receiving station
Alternative process.
Utility model content
The utility model aims to solve the problem that above mentioned problem, there is provided one kind injection drainage type evaporated natural gas retracting device,
Outer defeated flow is relatively low, and BOG can directly reclaim unnecessary BOG in the case that condenser system can not all condense and produce BOG in station again
Defeated pipe network outside to natural gas.The technical scheme that it is used is as follows：
One kind injection drainage type evaporated natural gas retracting device, including compressor, pressure sensor, check valve, drainage gas
Flowmeter, injection flow diverter, bypass Double position butterfly valve, gasifier, main road Double position butterfly valve, torch, evaporated natural gas house steward and metering
Outer defeated pipeline, it is characterised in that：Described is provided with pressure sensor on evaporated natural gas house steward, after compressor comes out,
Enter condenser system again all the way, another way is connected on injection flow diverter, and check valve and drainage air-flow are provided with this road pipeline
Gauge；Described gasifier exit is directly connected to the outer defeated pipeline of metering all the way, and main road Double position butterfly valve is provided with this road, another
Road is connected to injection flow diverter, installation bypass Double position butterfly valve on this road, and the outlet for spraying flow diverter is connected to the outer defeated pipeline of metering.
Described pressure sensor control Double position butterfly valve and the delay Push And Release of Double position butterfly valve.
Described check valve is horizontally arranged at by drainage gas line.
Beneficial effect：One kind injection drainage type evaporated natural gas retracting device, defeated flow is relatively low outside, BOG condensed systems again
In the case that system can not all condense the interior generation BOG in station, unnecessary BOG can be directly recycled to defeated pipe network outside natural gas, structure letter
It is single, it need not often be safeguarded after installation and debugging easy for installation are good, the purpose of energy-saving and emission-reduction can be largely fulfilled.
Brief description of the drawings
Fig. 1：Structural representation of the present utility model.
Symbol description
1. compressor, 2. pressure sensors, 3. check valves, 4. drainage air-flow gauge, 5. injection flow diverters, 6. bypass dibits
Butterfly valve, 7. gasifiers, 8. main road Double position butterfly valves, 9. torches, 10. evaporated natural gas house stewards, the outer defeated pipeline of 11. meterings.
Embodiment
The utility model is described in further detail with example below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of injection drainage type evaporated natural gas retracting device, including compressor 1, pressure sensor 2, list
To valve 3, drainage air-flow gauge 4, injection flow diverter 5, bypass Double position butterfly valve 6, gasifier 7, main road Double position butterfly valve 8, torch 9, steaming
Send out natural gas main 10 and the outer defeated pipeline 11 of metering, it is characterised in that：Described is provided with pressure on evaporated natural gas house steward 10
Force snesor 2, after compressor 1 comes out, enter condenser system again all the way, another way is connected on injection flow diverter 5, this road pipe
Check valve 3 and drainage air-flow gauge 4 are installed on line；Described gasifier 7 exports is directly connected to the outer defeated pipeline of metering all the way
11, main road Double position butterfly valve 8 is installed on this road, another way is connected to injection flow diverter 5, installation bypass Double position butterfly valve 6 on this road,
The outlet of injection flow diverter 5 is connected to the outer defeated pipeline 11 of metering.
Above-mentioned pressure sensor 2 controls the delay Push And Release of Double position butterfly valve 6 and Double position butterfly valve 8.
Above-mentioned check valve 3 is horizontally arranged at by drainage gas line.
The course of work：When defeated flow is relatively low outside, the treated evaporated natural gas of BOG compressors 1, which can not be re-condensed, is
System is sold out, it is necessary to reduce the load of BOG compressors 1, causes BOG manifold pressures to raise, when BOG manifold pressures are more than P1
When, pressure sensor 2 sends signal, and bypass Double position butterfly valve 6 is opened, and the late release of main road Double position butterfly valve 8, high-pressure natural gas passes through
Injection flow diverter 5 is bypassed into, swiftly flowing natural gas forms negative-pressure vacuum in the branch pipe cavity of injection flow diverter 5, from
And open check valve 3, the BOG suctions that BOG compressors 1 are exported are come in, and downstream metering is delivered to outer defeated natural gas
Outer defeated pipeline 11, now improves BOG compressor loads, reduces BOG manifold pressures.When BOG manifold pressures drop below P2,
Pressure sensor 2 sends signal, and main road Double position butterfly valve 8 is opened, and bypasses the late release of Double position butterfly valve 6.Outer defeated natural gas is through main road
Double position butterfly valve 8 directly removes the outer defeated pipeline 11 of downstream metering, and injection flow diverter 5 is stopped.
When the present apparatus is run, if outer defeated flow rise, then condenser system treating capacity are gone up, the load of BOG compressors 1 enters one
Step lifting, BOG manifold pressures are reduced to below P2, and pressure sensor 2 sends signal, and main road Double position butterfly valve 8 is opened, and bypass dibit
The late release of butterfly valve 6.Outer defeated natural gas directly removes the outer defeated pipeline 11 of metering through main road Double position butterfly valve 8, and injection flow diverter 5 stops work
Make.
Check valve 3 is installed on by drainage gas line, prevents what is come during normal work from the backflow of natural gas backbone
Natural gas flows into BOG compressors, while installs drainage air-flow gauge 4, the boil-off gas flow for being easy to measurement injection flow diverter 5 to reclaim
Size.
Claims (3)
1. one kind injection drainage type evaporated natural gas retracting device, including compressor (1), pressure sensor (2), check valve (3),
Drain air-flow gauge (4), injection flow diverter (5), bypass Double position butterfly valve (6), gasifier (7), main road Double position butterfly valve (8), torch
(9), evaporated natural gas house steward (10) and the outer defeated pipeline (11) of metering, it is characterised in that：On the evaporated natural gas house steward (10)
Pressure sensor (2) is installed, after compressor (1) comes out, enters condenser system again all the way, another way is connected to injection drainage
On device (5), check valve (3) and drainage air-flow gauge (4) are installed on this road pipeline；Described gasifier (7) outlet is straight all the way
The outer defeated pipeline (11) of metering is connected in succession, main road Double position butterfly valve (8) is installed on this road, another way is connected to injection flow diverter
(5), installation bypass Double position butterfly valve (6) on this road, the outlet of injection flow diverter (5) are connected to the outer defeated pipeline (11) of metering.
A kind of 2. injection drainage type evaporated natural gas retracting device according to claim 1, it is characterised in that：Pressure sensing
The delay Push And Release of device (2) control bypass Double position butterfly valve (6) and main road Double position butterfly valve (8).
A kind of 3. injection drainage type evaporated natural gas retracting device according to claim 1, it is characterised in that：Check valve
(3) it is horizontally arranged at by drainage gas line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620955679.4U CN206637256U (en) | 2016-08-20 | 2016-08-20 | One kind injection drainage type evaporated natural gas retracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620955679.4U CN206637256U (en) | 2016-08-20 | 2016-08-20 | One kind injection drainage type evaporated natural gas retracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206637256U true CN206637256U (en) | 2017-11-14 |
Family
ID=60260051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620955679.4U Expired - Fee Related CN206637256U (en) | 2016-08-20 | 2016-08-20 | One kind injection drainage type evaporated natural gas retracting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206637256U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763819A (en) * | 2019-03-22 | 2019-05-17 | 中国石油大学(华东) | A kind of dust removing apparatus for development machine |
| CN111561657A (en) * | 2020-05-21 | 2020-08-21 | 大连海洋大学 | Boil-off gas treatment device for liquefied natural gas device |
-
2016
- 2016-08-20 CN CN201620955679.4U patent/CN206637256U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763819A (en) * | 2019-03-22 | 2019-05-17 | 中国石油大学(华东) | A kind of dust removing apparatus for development machine |
| CN111561657A (en) * | 2020-05-21 | 2020-08-21 | 大连海洋大学 | Boil-off gas treatment device for liquefied natural gas device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20180820 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |