CN206112501U - Liquefied natural gas stores and ships recovery unit of in -process flash distillation gas - Google Patents
Liquefied natural gas stores and ships recovery unit of in -process flash distillation gas Download PDFInfo
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- CN206112501U CN206112501U CN201620956171.6U CN201620956171U CN206112501U CN 206112501 U CN206112501 U CN 206112501U CN 201620956171 U CN201620956171 U CN 201620956171U CN 206112501 U CN206112501 U CN 206112501U
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- bog
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Abstract
The utility model relates to a liquefied natural gas stores and ships recovery unit of in -process flash distillation gas, characterized by: at least, include: two sets of BOG heaters, two sets of BOG import and export heat exchanger, two sets of BOG compressor, and flash distillation gas passes through pipeline and valve branch three routes: the three routes in the entry of the first via and the BOG of first group heater communicate with each other, the three routes in the entry of second way and the second BOG of group heater communicate with each other, the three routes in the export of organizing the BOG heater of third way and first group BOG heater and second communicate with each other, the export of first group BOG heater and the second BOG of group heater at branch two tunnel, two the tunnel in the first via communicate with each other with the first entry that the BOG of first group imported and exported the heat exchanger, two the tunnel in the BOG of second way and the second group the second entrance that imports and exports the heat exchanger communicate with each other. The utility model has the advantages of simple process, low cost are operated to the equipment, area is little, the rate of recovery is high.
Description
Technical field
The utility model belongs to the storage of liquefied natural gas and shipment technical field, and in particular to a kind of liquefied natural gas storage
Deposit and shipment in flashed vapour retracting device.
Background technology
With the raising of countries in the world environmental consciousness, natural gas is increasingly favored as clean energy resource；It is natural in China
The consumption of gas and the ratio in energy supply also increase sharply, and especially the consumption and range of application of liquefied natural gas is all big
The raising of amplitude.LNG storage has 0.3% or so evaporation capacity in atmospheric low-temperature storage tank, daily, and evaporation gasification is produced
Flashed vapour increase can the pressure in storage tank, have influence on the safety of storage tank；Liquefied natural gas is in shipment due to entrucking
The mechanical work of equipment can also produce flashed vapour, these flashed vapours are discharged be guarantee system safety and entrucking is smoothed out must
Want condition.Flashed vapour, that is, the natural gas after gasifying belongs to cryogenic gas, inflammable and explosive, it is impossible to be directly discharged into air；And at recovery
Can be used as compressed natural gas or secondary liquefaction after reason.In order to ensure the safety of LNG storage and shipment, prevent because
Economic loss and environmental pollution that flashed vapour discharge is caused, the flashed vapour that liquefied natural gas is produced in storage and shipment
Reclaimed, and made simple process, so as to reuse just seem it is extremely important, it may have important meaning.
The content of the invention
The purpose of this utility model is to provide a kind of low LNG storage of the little, operating cost of investment and shipped
The retracting device of flashed vapour in journey, so as to the flashed vapour generated in storage and shipment（BOG）Collect in time and to return
Receive using the retracting device for making pretreatment.
To achieve these goals, in a kind of LNG storage and shipment flashed vapour retracting device, it is special
Levying is：At least include：Two groups of BOG heaters, two groups of BOG inlet outlet heat exchangers, two groups of BOG compressors, flashed vapour passes through pipeline
And three tunnels of valve point：
The first via in three described tunnels is communicated with the entrance of first group of BOG heater；The second tunnel in three described tunnels
Communicate with the entrance of second group of BOG heater；The 3rd tunnel in three described tunnels and first group of BOG heater and second group of BOG
The outlet of heater is communicated；
The outlet of described first group of BOG heater and second group of BOG heater is in a point two-way；In described two-way
Communicate with the first entrance of first group of BOG inlet outlet heat exchanger all the way；The second tunnel in described two-way and second group of BOG turnover
The second entrance of mouth heat exchanger is communicated；
The entrance of first group of BOG compressor of two groups of described BOG compressors imports and exports heat exchange with first group of described BOG
The first outlet of device is communicated, the 3rd entrance of the outlet of first group of BOG compressor and first group of described BOG inlet outlet heat exchanger
Communicate；
The entrance of second group of BOG compressor of two groups of described BOG compressors imports and exports heat exchange with second group of described BOG
The second outlet of device is communicated, the 4th entrance of the outlet of second group of BOG compressor and second group of described BOG inlet outlet heat exchanger
Communicate；
3rd outlet and second group of described BOG inlet outlet heat exchanger of first group of described BOG inlet outlet heat exchanger
4th outlet is communicated with the entrance of secondary utilization equipment.
Described BOG heaters adopt air-cooled type structure.
Described BOG inlet outlet heat exchangers adopt plate-fin heat exchanger.
Described BOG compressors adopt reciprocating compressor.
The flashed vapour that the utility model is heated up by the use of after air and pressurization is heated as thermal source to the flashed vapour of low temperature
Heat up, greatly reduce the operation energy consumption of device；The lifting of flashed vapour temperature decreases back segment compressor and secondary utilization sets
Standby investment cost.Every kind of equipment is respectively provided with two, can make full use of the heat of system itself and outside air；Even if separate unit
Equipment breaks down, and nor affects on the operation of package unit.With equipment operation process is simple, with low cost, floor space it is little,
The advantages of rate of recovery is high.
Description of the drawings
The technical solution of the utility model is further described in conjunction with drawings and Examples：
Fig. 1 is the structural representation of the retracting device of flashed vapour in LNG storage and shipment.
Label in figure：1st, first group of BOG heater；2nd, second group of BOG heater；3rd, first group of BOG inlet outlet heat exchanger；
4th, second group of BOG inlet outlet heat exchanger；5th, first group of BOG compressor；6th, second group of BOG compressor；7th, flashed vapour；8th, first enters
Mouthful；9th, the 3rd entrance；10th, the 3rd outlet；11st, first outlet；12nd, second entrance；13rd, the 4th entrance；14th, the 4th outlet；15、
Second outlet；16th, secondary utilization equipment.
Specific embodiment
As shown in Figure 1, in a kind of LNG storage and shipment flashed vapour retracting device, at least include：Two
Group BOG heaters, two groups of BOG inlet outlet heat exchangers, two groups of BOG compressors, flashed vapour 7 is by three tunnels of pipeline and valve point：
The first via in three described tunnels is communicated with the entrance of first group of BOG heater 1；The second tunnel in three described tunnels
Communicate with the entrance of second group of BOG heater 2；The 3rd tunnel in three described tunnels and first group of BOG heater 1 and second group
The outlet of BOG heaters 2 is communicated；
The outlet of described first group of BOG heater 1 and second group of BOG heater 2 in a point two-way,
The first via in described two-way is communicated with the first entrance 8 of first group of BOG inlet outlet heat exchanger 3,
The second tunnel in described two-way communicates with the second entrance 12 of second group of BOG inlet outlet heat exchanger 4；
The entrance of first group of BOG compressor 5 of two groups of described BOG compressors is imported and exported with first group of described BOG and changed
The first outlet 11 of hot device 3 is communicated, the outlet of first group of BOG compressor 5 and first group of described BOG inlet outlet heat exchanger 3
3rd entrance 9 is communicated；
The entrance of second group of BOG compressor 6 of two groups of described BOG compressors is imported and exported with second group of described BOG and changed
The second outlet 15 of hot device 4 is communicated, the outlet of second group of BOG compressor 6 and second group of described BOG inlet outlet heat exchanger 4
4th entrance 13 is communicated；
3rd outlet 10 of first group of described BOG inlet outlet heat exchanger 3 and second group of described BOG inlet outlet heat exchanger
4 the 4th outlet 14 is communicated with the entrance of secondary utilization equipment 16.
The utility model is got up these equipment with the connection of series-parallel version by pipeline and valve.Liquefaction is natural
The flashed vapour 7 that gas is produced in storage and shipment sequentially passes through two groups of BOG heaters --- and two groups of BOG import and export heat exchange
Device --- two groups of BOG inlet outlet heat exchangers are reentered after two groups of BOG compressors, collected, heated up, being boosted etc. and being sent after processing
Toward secondary utilization equipment 16.
Two groups of BOG heaters, two groups of BOG inlet outlet heat exchangers, two groups of BOG compressors are standby each other.
BOG heaters adopt air-cooled type structure.
BOG inlet outlet heat exchangers adopt plate-fin heat exchanger.
BOG compressors adopt reciprocating compressor.
LNG storage has 0.3% or so natural evaporation amount in atmospheric low-temperature storage tank, daily, liquefies natural
The natural evaporation of gas produces flashed vapour；Flashed vapour increases can the pressure in storage tank, have influence on the routine safety of storage tank.In dress
During car, the mechanical work of Loading Pump will also result in the gasification generation flashed vapour of liquefied natural gas；Also there is residual in transport tank car
Gasifying gas.Only these flash gas are ejected during entrucking just can guarantee that the smooth safety of entrucking is carried out.Come
BOG heaters are entered after collecting by pipeline from the low-flash gas of tank top and loading station, is heated up with outside air heat exchange
To -20 DEG C or so；High temperature flashed vapour after entering back into BOG inlet outlet heat exchangers and being flowed back by BOG compressors is exchanged heat, temperature
Further it is promoted to 5 DEG C or so.Flashed vapour after intensification enters back into BOG compressors and is forced into 2MPa or so, and temperature also rises to 40
DEG C or so；Last flashed vapour is back to again after being exchanged heat with the flashed vapour of low temperature in BOG inlet outlet heat exchangers and is sent to secondary profit
Use equipment（Again liquefy or prepare CNG）.
BOG heaters adopt air-cooled type structure, are exchanged heat using air and low-flash gas；Two BOG heaters alternately make
With, it is to avoid because low temperature frosting affects heat exchange efficiency.BOG inlet outlet heat exchangers adopt plate-fin heat exchanger, at utmost using dress
Interior heat is put, plant running expense is reduced.Flashed vapour after intensification finally enters back into BOG compressors, reduces the system of equipment
Requirement is made, equipment cost is reduced.Package unit has structural manufacturing process simple, and floor space is little, equipment investment is few, operating cost
It is cheap, the advantage such as flash distillation gas recovery rate height.
Claims (4)
1. in a kind of LNG storage and shipment flashed vapour retracting device, it is characterized in that：At least include：Two groups
BOG heaters, two groups of BOG inlet outlet heat exchangers, two groups of BOG compressors, flashed vapour（7）By three tunnels of pipeline and valve point：
The first via in three described tunnels and first group of BOG heater（1）Entrance communicate；The second tunnel in three described tunnels with
Second group of BOG heater（2）Entrance communicate；The 3rd tunnel in three described tunnels and first group of BOG heater（1）With second group
BOG heaters（2）Outlet communicate；
First group of described BOG heater（1）With second group of BOG heater（2）Outlet in a point two-way；In described two-way
The first via and first group of BOG inlet outlet heat exchanger（3）First entrance（8）Communicate；The second tunnel and second in described two-way
Group BOG inlet outlet heat exchangers（4）Second entrance（12）Communicate；
First group of BOG compressor of two groups of described BOG compressors（5）Entrance and described first group of BOG import and export heat exchange
Device（3）First outlet（11）Communicate, first group of BOG compressor（5）Outlet and first group of described BOG inlet outlet heat exchanger
(3) the 3rd entrance (9) is communicated；
The entrance of second group of BOG compressor (6) of two groups of described BOG compressors imports and exports heat exchange with second group of described BOG
The second outlet of device (4)（15）Communicate, the outlet of second group of BOG compressor (6) and second group of described BOG inlet outlet heat exchanger
(4) the 4th entrance (13) is communicated；
3rd outlet (10) of first group of described BOG inlet outlet heat exchanger (3) and second group of described BOG inlet outlet heat exchanger
(4) the 4th outlet (14) is communicated with the entrance of secondary utilization equipment (16).
2. in a kind of LNG storage according to claim 1 and shipment flashed vapour retracting device, it is special
Levying is：Described BOG heaters adopt air-cooled type structure.
3. in a kind of LNG storage according to claim 1 and shipment flashed vapour retracting device, it is special
Levying is：Described BOG inlet outlet heat exchangers adopt plate-fin heat exchanger.
4. in a kind of LNG storage according to claim 1 and shipment flashed vapour retracting device, it is special
Levying is：Described BOG compressors adopt reciprocating compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620956171.6U CN206112501U (en) | 2016-08-29 | 2016-08-29 | Liquefied natural gas stores and ships recovery unit of in -process flash distillation gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620956171.6U CN206112501U (en) | 2016-08-29 | 2016-08-29 | Liquefied natural gas stores and ships recovery unit of in -process flash distillation gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206112501U true CN206112501U (en) | 2017-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620956171.6U Expired - Fee Related CN206112501U (en) | 2016-08-29 | 2016-08-29 | Liquefied natural gas stores and ships recovery unit of in -process flash distillation gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206112501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577260A (en) * | 2020-12-02 | 2021-03-30 | 上海汇舸环保科技有限公司 | Natural gas reliquefaction system for ship |
-
2016
- 2016-08-29 CN CN201620956171.6U patent/CN206112501U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577260A (en) * | 2020-12-02 | 2021-03-30 | 上海汇舸环保科技有限公司 | Natural gas reliquefaction system for ship |
| CN112577260B (en) * | 2020-12-02 | 2022-05-31 | 上海汇舸环保科技有限公司 | Natural gas reliquefaction system for ship |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170419 Termination date: 20200829 |