CN205718202U

CN205718202U - BOG retracting device

Info

Publication number: CN205718202U
Application number: CN201620367452.8U
Authority: CN
Inventors: 吴维武; 袁振钦; 王东宝; 陈伟
Original assignee: SHANGHAI RICHTECH CO Ltd
Current assignee: SHANGHAI RICHTECH CO Ltd
Priority date: 2016-04-27
Filing date: 2016-04-27
Publication date: 2016-11-23
Anticipated expiration: 2026-04-27

Abstract

This utility model provides a kind of BOG retracting device, including: housing；The side of housing is provided with BOG inlet collector and BOG outlet collector；The upper end of housing is provided with LNG outlet collector, and the lower end of housing is provided with LNG inlet collector；Enclosure interior is provided with at least one heat exchange core body；Heat exchange core body includes the first side plate, the second side plate and the LNG plate being clipped between described first side plate, the second side plate, BOG plate；It is etched with a plurality of LNG stream road being parallel to each other, LNG outlet collector and the described LNG inlet collector two ends respectively with LNG stream road on LNG plate to connect；The a plurality of BOG runner being parallel to each other it is etched with on BOG plate, BOG runner is first from the beginning of at BOG inlet collector, the edge of BOG plate is extended to along the direction perpendicular with LNG stream road, revolution extends to the other edge of BOG plate along the direction perpendicular with LNG stream road again, and roundabout being advanced until of BOG runner is connected with BOG outlet collector.This utility model simplifies the technological process that BOG reclaims, and improves organic efficiency.

Description

BOG retracting device

Technical field

This utility model relates to LNG production technical field, particularly relates to a kind of BOG retracting device method.

Background technology

LNG, Liquefied Natural Gas, Chinese is liquefied natural gas, and liquefied natural gas produces at it, store, transports Defeated and use during, there is generation and the process problem of BOG, BOG i.e. Boil Off Gas, Chinese is boil-off gas. How to process the BOG in LNG system, have influence on the safety that system is run, and directly influence the economy that system is run Property.The discharge of BOG, the most unfavorable to environment.Developing rapidly and extensively applying along with liquefied natural gas industry, annual consumption LNG enormous amount, should pay much attention to BOG in LNG industrial chain and process problem.

The technological process that existing BOG reclaims is complex, and equipment is huge, and organic efficiency is low, the most uneconomical.

Utility model content

The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of simple in construction, reclaim efficiently BOG retracting device.

For achieving the above object and other relevant purposes, this utility model provides a kind of BOG retracting device, including: housing；Institute The side stating housing is provided with BOG inlet collector and BOG outlet collector, the water residing for described BOG inlet collector Mean place is higher than the horizontal level of described BOG outlet collector, and described BOG inlet collector collects with described BOG outlet Clutch lays respectively at relative two diagonal position of described housing；The upper end of described housing is provided with LNG outlet collector, described The lower end of housing is provided with LNG inlet collector；Described enclosure interior is provided with at least one heat exchange core body；Described heat exchange core body includes First side plate, the second side plate and at least one of which LNG plate being clipped between described first side plate, the second side plate, at least one of which BOG plate, described LNG plate, described BOG plate are alternately stacked；It is etched with a plurality of the most flat on described LNG plate The described LNG stream road of row, described LNG stream road is placed in the vertical direction, described LNG outlet collector and described LNG Inlet collector two ends with LNG stream road respectively connect；The a plurality of BOG being parallel to each other stream it is etched with on described BOG plate Road, described BOG runner, first from the beginning of at BOG inlet collector, extends to along the direction perpendicular with described LNG stream road The edge of BOG plate, then turn round the other edge extending to BOG plate along the direction perpendicular with described LNG stream road, institute State roundabout being advanced until of BOG runner to be connected with described BOG outlet collector.

Preferably, described LNG stream road is covered with described LNG plate.

Preferably, described LNG stream road and described BOG runner are along flowing to be equipped with multiple bend, along flowing to complications forward.

Further, described bend is Z-shaped.

Preferably, the cross section of described LNG stream road and described BOG runner is semicircle.

Further, described semicircular a diameter of 0.2mm-5mm.

Preferably, described LNG plate, BOG plate form integral structure by atoms permeating mode is molten mutually.

Preferably, described LNG stream road and described BOG runner use the etching of Optical Electro-Chemistry etch process to form.

Preferably, the side of described housing is additionally provided with mounting bracket.

This utility model further relates to a kind of BOG recovery method using described BOG retracting device: described BOG entrance collection Clutch connects a BOG compressor, and described LNG inlet collector connects a LNG high-pressure pump；BOG recovery method is: steam Get angry after BOG compressor compresses, by BOG inlet collector, enter the BOG runner of heat exchange core body；Liquefaction sky So gas is after LNG high-pressure pump pressurizes, and by LNG inlet collector, enters the LNG stream road of heat exchange core body；Changing In hot core body, after boil-off gas and liquefied natural gas carry out heat exchange, boil-off gas condensation liquefaction, by BOG outlet collector, Enter BOG recycling can.

As it has been described above, this utility model BOG retracting device and BOG recovery method, have the advantages that

1, improving traditional B OG way of recycling, simplification of flowsheet, saving takes up room, and improves organic efficiency；

2, retracting device simple in construction, and small portable, be applicable to multiple BOG and reclaim occasion；

3, recovery method is simple, uses two media direct heat transfer, and heat transfer area density is high, and heat exchange efficiency is high, it is ensured that BOG That reclaims is efficient；

4, in runner manufacturing process, Optical Electro-Chemistry etch process and diffusion welding craft are used, it is ensured that the precision of runner；

5, using integral structure, use diffusion welding craft, core is made up of unique mother metal, it is not necessary to pad and welding, Can adapt to high pressure requirement；Reduce pipeline and the use of valve simultaneously, can effectively reduce and reveal and vibration loss, Stability Analysis of Structures, Safety is good, is effectively improved service life；

6, easy transportation and installation, it is not necessary to safeguard.

Accompanying drawing explanation

Fig. 1 is shown as the main TV structure schematic diagram of the BOG retracting device of the present embodiment.

Fig. 2 is shown as the left view structural representation of the BOG retracting device of the present embodiment.

Fig. 3 is shown as the BOG retracting device of the present embodiment when not installing LNG outlet collector, changing in BOG retracting device The plan structure schematic diagram of hot core body.

Fig. 4 is shown as the structure for amplifying schematic diagram at the A of Fig. 3.

Fig. 5 is shown as the vertical direction cross-sectional view of the BOG plate of the BOG retracting device of the present embodiment.

Fig. 6 is shown as the structure for amplifying schematic diagram at the B of Fig. 5.

Fig. 7 be shown as the E-E of Fig. 6 to schematic cross-section.

Fig. 8 is shown as the vertical direction schematic cross-section of the LNG plate of the BOG retracting device of the present embodiment. Fig. 9 is shown as the structure for amplifying schematic diagram at the C of Fig. 8.

Figure 10 be shown as the E-E of Fig. 9 to schematic cross-section.

Figure 11 is shown as the fundamental diagram of the BOG recovery method of the present embodiment.

Element numbers explanation

10 BOG retracting devices

100 housings

210 BOG inlet collector

220 BOG outlet collector

310 LNG outlet collector

320 LNG inlet collector

400 heat exchange core bodies

410 first side plates

420 second side plates

430 LNG plates

431 LNG stream roads

440 BOG plates

441 BOG runners

450 bends

510 BOG compressors

520 BOG recycling cans

600 LNG high-pressure pumps

610 LNG vaporization devices

700 mounting brackets

810 BOG inlet flanges

820 LNG suction flanges

830 BOG outlet(discharge) flanges

840 LNG outlet(discharge) flanges

Detailed description of the invention

By particular specific embodiment, embodiment of the present utility model being described below, those skilled in the art can be by this specification Disclosed content understands other advantages of the present utility model and effect easily.

Refer to Fig. 1 to Figure 11.It should be clear that structure depicted in this specification institute accompanying drawings, ratio, size etc., the most only in order to Coordinating the content disclosed in description, understand for those skilled in the art and read, being not limited to this utility model can The qualifications implemented, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the tune of size Whole, under not affecting effect that this utility model can be generated by and the purpose that can reach, all should still fall and be taken off at this utility model In the range of the technology contents shown can be contained.Meanwhile, in this specification cited as " on ", D score, "left", "right", " in Between " and the term of " " etc., it is merely convenient to understanding of narration, and is not used to limit the enforceable scope of this utility model, its phase Relation is altered or modified, is changing under technology contents without essence, when being also considered as the enforceable category of this utility model.

As shown in Figure 1 to 11, the present embodiment provides a kind of BOG retracting device 10, and it includes:

Housing 100；

The side of housing 100 is provided with BOG inlet collector 210 and BOG outlet collector 220；BOG inlet collector Horizontal level residing for 210 is higher than the horizontal level of BOG outlet collector 220, and BOG inlet collector 210 and BOG Outlet collector 220 lays respectively at relative two diagonal position of housing 100；

The upper end of housing 100 is provided with LNG outlet collector 310, and the lower end of housing 100 is provided with LNG inlet collector 320；

Housing 100 is internal is provided with at least one heat exchange core body 400；Heat exchange core body 400 includes first side plate the 410, second side plate 420 and at least one of which LNG plate 430 that is clipped between first side plate the 410, second side plate 420 and at least one of which BOG plate Sheet 440, LNG plate 430, BOG plate 440 are alternately stacked；

Being etched with a plurality of LNG stream road 431 being parallel to each other on LNG plate 430, LNG stream road 431 sets along vertical direction Put, LNG outlet collector 310 with LNG inlet collector 320 respectively two ends with LNG stream road 431 connect；

Being etched with BOG runner 441 on BOG plate 440, BOG runner 441 is first opened at BOG inlet collector 210 Begin, extend to the edge of BOG plate 440 along the direction perpendicular with LNG stream road 431, then turn round edge and LNG stream road 431 perpendicular directions extend to the other edge of BOG plate 440, and roundabout being advanced until of BOG runner 441 goes out with BOG Mouth collector 220 is connected.

When using the BOG retracting device 10 of the present embodiment, liquefied natural gas is liquid, and liquefied natural gas is from being in housing 100 Lower end be provided with LNG inlet collector 320 and enter in LNG stream road 431 so that liquefied natural gas is in LNG stream road 431 In liquid level be gradually increasing；Boil-off gas is input to BOG runner 441 from BOG inlet collector 210, due to BOG Runner 441 is the structure of the most roundabout advance, makes boil-off gas during flowing downward, it is possible to fill with liquefied natural gas Divide and realize heat exchange, it is ensured that near the condensation liquefaction of the boil-off gas of BOG outlet collector 220, and near LNG outlet set The liquefied natural gas of device 310 is gas-liquid mixture phase.

The effect of LNG inlet collector 320 is to make entrance liquefied natural gas enter and be diverted to each LNG stream road 431, LNG The effect of outlet collector 310 is to liquefied natural gas afflux and to discharge；The effect of BOG inlet collector 210 is to make boil-off gas Entering and be diverted to each BOG runner 441, the effect of BOG outlet collector 220 is to boil-off gas afflux and to discharge.

BOG plate 440, LNG plate 430 are alternately stacked, make boil-off gas, liquefied natural gas by BOG runner 441, Heat exchange is carried out during in LNG plate runner.Liquefied natural gas is entered by LNG inlet collector 320, and is further separated into Each LNG stream road 431, after heating through heat exchange, converges to LNG outlet collector 310 and discharges；Boil-off gas Entered by BOG inlet collector 210, and be further separated into each BOG runner 441, after cooling down through heat exchange, converge Gather BOG outlet collector 220 and discharge.

The mode flowing to the employing roundabout advance of S type of BOG runner 441, can improve the length of BOG runner 441, thus carry The heat exchange efficiency of this heat exchanger high；Solid matter a plurality of LNG stream road 431 keeping parallelism on every layer of LNG plate 430, BOG flows Road 441 is covered with every layer of BOG plate 440, adds LNG plate 430, the space availability ratio of BOG plate 440.

LNG stream road 431 and BOG runner 441 is along flowing to be equipped with multiple bend 450, along flowing to complications forward.Bend 450 In Z-shaped.This structure can add LNG stream road 431, the entire length of BOG runner 441, adds LNG plate 430, the heat exchange area of BOG plate 440.The angle of bend 450 is 30 °～150 °, i.e. the Z-shaped angle of bend 450 It it is 60 °～150 °；In the present embodiment, the angle [alpha] of bend 450 is 150 °, selects this angle, it is possible to reaching preferable While heat exchanger effectiveness, it is simple to processing.

The cross section of LNG stream road 431 and BOG runner 441 is semicircle, semicircular a diameter of 0.2mm-5mm.This In embodiment, semicircular a diameter of 0.9mm, select this diameter, it is possible to while reaching preferable heat exchanger effectiveness, just In processing.

LNG plate 430, BOG plate 440 form integral structure by atoms permeating mode is molten mutually.And weld in two sides Upper first side plate 410 and the second side plate 420, it is ensured that every LNG stream road 431, the independence of BOG runner 441 and closing Property.In the present embodiment, the thickness of the first side plate 410 and the second side plate 420 is 13mm.

BOG inlet collector 210, BOG outlet collector 220, LNG inlet collector 320 and LNG outlet collector 310 are connected as a single entity with housing 100 by welding manner, form a complete heat exchanger, and whole heat exchanger is integral structure, Cannot dismantle, indivisible.

LNG stream road 431 and BOG runner 441 uses the etching of Optical Electro-Chemistry etch process to form.

Being additionally provided with mounting bracket 700 on the side of housing 100, mounting bracket 700 is easy to the installation of BOG retracting device 10.

LNG plate 430 and BOG plate 440 at least one of which, the quantity of No. of plates and runner need to be according to concrete BOG at Reason amount is designed determining；In the present embodiment, the overall space of BOG retracting device 10 a size of 1.2m × 1.5m × 0.55m； Each LNG plate 430 and each BOG plate 440 thickness are 1.6mm.

This utility model further relates to the BOG recovery method of the BOG retracting device 10 of a kind of employing: BOG inlet collector 210 Being connected with a BOG compressor 510 by BOG inlet flange 810, LNG inlet collector 320 is by LNG import method Blue 820 connect a LNG high-pressure pump 600, and BOG outlet collector 220 is returned with a BOG by BOG outlet(discharge) flange 830 Closed cans 520 connects；LNG outlet collector 310 connects a LNG vaporization device 610 by LNG outlet(discharge) flange 840；

BOG recovery method is: boil-off gas, after BOG compressor 510 compresses, by BOG inlet collector 210, is entered Enter the BOG runner 441 of heat exchange core body 400；Liquefied natural gas, after LNG high-pressure pump 600 pressurizes, is entered by LNG Mouth collector 320, enters the LNG stream road 431 of heat exchange core body 400；In heat exchange core body 400, boil-off gas and liquefaction are natural After gas carries out heat exchange, boil-off gas condensation liquefaction, by BOG outlet collector 220, enter BOG recycling can 520； After liquefied natural gas heat exchange, for gas-liquid mixture phase, by LNG outlet collector 310, enter LNG vaporization device 610 and continue Continue gasification.

This utility model BOG retracting device 10 is a kind of micropore heat-exchanger rig, has higher BOG organic efficiency；And Apparatus structure uses diffusion welding craft, it is ensured that the stability of structure.Its monolithic construction simultaneously, it is achieved that retracting device Miniaturization and lightweight.BOG recovery method technological process is simple, workable.

So, this utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.

Above-described embodiment only illustrative principle of the present utility model and effect thereof, not for limiting this utility model.Any Above-described embodiment all can be modified under spirit and the scope of the present utility model or change by those skilled in the art. Therefore, such as art has usually intellectual without departing from the spirit disclosed in this utility model with under technological thought All equivalences completed are modified or change, and must be contained by claim of the present utility model.

Claims

1. a BOG retracting device, it is characterised in that including:

Housing (100)；

The side of described housing (100) is provided with BOG inlet collector (210) and BOG outlet collector (220), horizontal level residing for described BOG inlet collector (210) is higher than the horizontal level of described BOG outlet collector (220), and described BOG inlet collector (210) lays respectively at two relative diagonal positions of described housing (100) with described BOG outlet collector (220)；

The upper end of described housing (100) is provided with LNG outlet collector (310), and the lower end of described housing (100) is provided with LNG inlet collector (320)；

Described housing (100) is internal is provided with at least one heat exchange core body (400)；

Described heat exchange core body (400) includes the first side plate (410), the second side plate (420) and at least one of which LNG plate (430) being clipped between described first side plate (410), the second side plate (420), at least one of which BOG plate (440), and described LNG plate (430), described BOG plate (440) are alternately stacked；

The a plurality of LNG stream road (431) being parallel to each other it is etched with on described LNG plate (430), described LNG stream road (431) is placed in the vertical direction, described LNG outlet collector (310) with described LNG inlet collector (320) respectively two ends with described LNG stream road (431) connect；

The a plurality of BOG runner (441) being parallel to each other it is etched with on described BOG plate (440), described BOG runner (441) is first from the beginning of BOG inlet collector (210) place, the edge of BOG plate (440) is extended to along the direction perpendicular with described LNG stream road (431), revolution extends to the other edge of BOG plate (440) along the direction perpendicular with described LNG stream road (431) again, and roundabout being advanced until of described BOG runner (441) is connected with described BOG outlet collector (220).

BOG retracting device the most according to claim 1, it is characterised in that: described LNG stream road (431) is covered with described LNG plate (430).

BOG retracting device the most according to claim 1, it is characterised in that: described LNG stream road (431) and described BOG runner (441) are along flowing to be equipped with multiple bend (450), along flowing to complications forward.

BOG retracting device the most according to claim 3, it is characterised in that: described bend (450) is in Z-shaped.

BOG retracting device the most according to claim 1, it is characterised in that: the cross section of described LNG stream road (431) and described BOG runner (441) is semicircle.

BOG retracting device the most according to claim 5, it is characterised in that: described semicircular a diameter of 0.2mm-5mm.

BOG retracting device the most according to claim 1, it is characterised in that: described LNG plate (430), BOG plate (440) form integral structure by atoms permeating mode is molten mutually.

BOG retracting device the most according to claim 1, it is characterised in that: described LNG stream road (431) and described BOG runner (441) use the etching of Optical Electro-Chemistry etch process to form.

BOG retracting device the most according to claim 1, it is characterised in that: it is additionally provided with mounting bracket (700) on the side of described housing (100).