CN220102844U - LNG storage tank capable of preventing liquefied natural gas from layering - Google Patents
LNG storage tank capable of preventing liquefied natural gas from layering Download PDFInfo
- Publication number
- CN220102844U CN220102844U CN202321130357.2U CN202321130357U CN220102844U CN 220102844 U CN220102844 U CN 220102844U CN 202321130357 U CN202321130357 U CN 202321130357U CN 220102844 U CN220102844 U CN 220102844U
- Authority
- CN
- China
- Prior art keywords
- condensing plate
- tank body
- storage tank
- liquid
- wall
- 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.)
- Active
Links
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 48
- 238000003860 storage Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000003756 stirring Methods 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 6
- 230000032798 delamination Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses an LNG storage tank for preventing layering of liquefied natural gas, wherein a protective shell is sleeved on the outer surface of the tank body; the condensing plate is of a hollow structure, and the inner wall of the condensing plate is connected with a plurality of guide pipes which penetrate through the upper side and the lower side of the condensing plate; one end of the refrigerator is connected with the liquid inlet pipe, and the liquid inlet pipe extends into the tank body; the other end of the refrigerator and the liquid outlet pipe are connected to the inlet of the condensing plate; the inner wall of the protective shell at the other side of the tank body is connected with a liquid pump, and an inlet pipe of the liquid pump is connected with an outlet of the condensing plate; the outlet pipe of the liquid pump is matched with the stirring mechanism. The device solves the problems that the layering phenomenon is easy to form when the storage tank stores liquefied natural gas for a long time, so that the pressure is increased suddenly and the rolling risk occurs, and solves the characteristics that the actual effect of mixing and stirring by pumping back BOG gas is poor and the sealing effect is poor in the existing layering prevention storage tank; the device has the characteristics that BOG gas in the tank can be condensed, and layering phenomenon can be avoided through upper and lower mixed flows.
Description
Technical Field
The utility model belongs to the field of liquefied natural gas production equipment, and particularly relates to an LNG storage tank capable of preventing liquefied natural gas from layering.
Background
LNG refers to liquefied natural gas, is low-temperature liquid stored at 162 ℃ below zero, in the LNG storage process, layering phenomenon is easy to occur due to long-time storage, the layering phenomenon can accelerate the LNG gasification process, the LNG is enabled to roll, huge storage tank pressure is instantaneously manufactured, huge potential safety hazards are brought, in general, in-tank liquid mixing is carried out by a BOG gas discharge method or a spraying method, and environmental pollution and LNG resource waste are caused by the BOG gas discharge method; the spraying method complicates the whole structure of the tank body; the company performs early-stage reconstruction on the storage tank, and detailed patent number is CN213361864U, which discloses an LNG storage tank capable of preventing layering, wherein a protective shell is additionally arranged outside the storage tank, a condensing plate is arranged, BOG gas in an upper buffer zone is pumped and discharged through an air pump, condensed and then is re-converged into the bottom of the tank body, so that the effect of stirring and mixing flows is achieved; the inner wall of the tank body is provided with an electrically driven stirring mechanism for stirring, and a partition plate is arranged in the middle for partitioning; after the tank body is put into use for a period of time, the following problems are found:
1, because the evaporation amount and evaporation speed of the BOG gas are insufficient, the practical effect of mixing and stirring by pumping back the BOG gas is poor, and the air is required to be prevented from being pumped from the BOG discharge pipe;
2, the surface of the tank body is provided with a plurality of openings, and through openings are arranged for arranging a bearing structure so as to be convenient for arranging a motor and a rotating shaft and used for driving a stirring mechanism, and the sealing requirement in practical improvement is extremely high and the difficulty is high;
3, the inside baffle that has set up of jar body is controlled and is separated to the district's the conversion is controlled through external pump machine, and the effect is not good in the in-service use, and the power consumption is higher.
Therefore, based on the above design defects, there is a need to design an LNG storage tank that prevents delamination of LNG and further reform the earlier equipment to solve the existing defects.
Disclosure of Invention
The utility model aims to solve the technical problems of pressure rapid increase and rolling risk caused by the fact that the LNG storage tank for preventing the layering of the liquefied natural gas is easy to form layering phenomenon when the liquefied natural gas is stored for a long time in the storage tank in the prior art, and the characteristics of poor practical effect and poor sealing effect of the traditional layering prevention storage tank for carrying out mixed flow stirring by pumping back BOG gas are solved; the device has the characteristics that BOG gas in the tank can be condensed, and layering phenomenon can be avoided through upper and lower mixed flows.
In order to realize the design, the utility model adopts the following technical scheme: an LNG storage tank for preventing liquefied natural gas from layering comprises a tank body, wherein the top of the tank body is connected with a BOG discharge pipe; the upper part of the inner wall of the tank body is connected with a condensing plate, and a BOG buffer chamber is arranged between the condensing plate and the top cover above the condensing plate; a protective shell is sleeved on the outer surface of the tank body; the condensing plate is of a hollow structure, and two ends of the condensing plate are respectively provided with an inlet and an outlet; the inner wall of the condensing plate is connected with a plurality of guide pipes which penetrate through the upper side and the lower side of the condensing plate; the upper part of the inner wall of the protective shell is connected with a refrigerator, one end of the refrigerator is connected with a liquid inlet pipe, and the liquid inlet pipe extends into the tank body; the other end of the refrigerator is connected with a liquid outlet pipe which is communicated with the inlet of the condensing plate; the inner wall of the protective shell at the other side of the tank body is connected with a liquid pump, and an inlet pipe of the liquid pump is connected with an outlet of the condensing plate; the outlet pipe of the liquid pump is matched with the stirring mechanism.
Preferably, the conduit is of an inverted funnel-shaped structure, and a plurality of guide posts are connected to the inclined plane of the inner wall of the conduit.
Further, the number of the guide pipes is multiple, and the guide pipes are used for the BOG gas in the tank body to pass through and rise into the BOG buffer chamber.
Preferably, the stirring mechanism comprises a stirring shaft which is rotationally connected with the inner wall of the tank body, and a plurality of stirring blades are connected with the outer surface of the stirring shaft at equal intervals.
Further, the stirring mechanism can be provided with 2-3 groups at different heights, and meanwhile, a branch pipe is connected to an outlet pipe of the liquid pump through a plurality of three-way valves, and a plurality of branch pipes are separated to be matched with different stirring mechanisms.
Preferably, the outlet pipe end of the liquid pump extends into the tank body, and the outlet pipe end of the liquid pump is connected with a nozzle which faces the stirring blade of the stirring mechanism.
Further, the nozzle is inclined downwards towards the stirring blade and forms a certain angle, and when the stirring blade is used, the jet flow sprayed by the nozzle can stir LNG liquid at the bottom layer, and meanwhile, certain flow is formed in the LNG liquid to drive the stirring blade to rotate.
The LNG storage tank for preventing the layering of the liquefied natural gas has the beneficial effects that:
the device is improved on the basis of original equipment, an air pump is changed into a liquid pump, the way that BOG gas pumped into a BOG buffer chamber enters the bottom of a storage tank is changed into the way that LNG top layer liquid in the storage tank is directly pumped to the bottom layer, and the conversion between the upper layer and the lower layer is realized; the baffle structure inside the original storage tank is removed, the original motor-driven stirring mechanism is modified, motor driving is not needed, the stirring shaft is driven to rotate by directly flowing LNG liquid driven by jet flow at the outlet end of the liquid pump, the opening of the tank body is further reduced, and the sealing performance is enhanced.
Drawings
FIG. 1 is a schematic view of the internal structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of a condensing plate according to the present utility model;
FIG. 3 is a schematic view of a condensing plate according to the present utility model;
FIG. 4 is a schematic view of a catheter according to the present utility model;
the reference numerals in the drawings are: tank 1, bog discharge pipe 11, protective housing 12, condensation plate 2, pipe 3, guide post 31, refrigerator 4, feed pipe 41, drain pipe 42, liquid pump 5, nozzle 51, stirring shaft 61, stirring vane 62.
Detailed Description
As shown in fig. 1 to 4, an LNG storage tank for preventing layering of liquefied natural gas includes a tank body 1, wherein a BOG discharge pipe 11 is connected to the top of the tank body 1; the upper part of the inner wall of the tank body 1 is connected with a condensing plate 2, and a BOG buffer chamber is arranged between the condensing plate 2 and a top cover above the condensing plate; a protective shell 12 is sleeved on the outer surface of the tank body 1; the condensing plate 2 is of a hollow structure, and an inlet and an outlet are respectively arranged at two ends of the condensing plate 2; the inner wall of the condensing plate 2 is connected with a plurality of guide pipes 3 which penetrate through the upper side and the lower side of the condensing plate 2; the refrigerator 4 is connected to the upper part of the inner wall of the protective shell 12, one end of the refrigerator 4 is connected with the liquid inlet pipe 41, and the liquid inlet pipe 41 extends into the tank body 1; the other end of the refrigerator 4 is connected with a liquid outlet pipe 42, and the liquid outlet pipe 42 is communicated with the inlet of the condensing plate 2; the inner wall of a protective shell 12 at the other side of the tank body 1 is connected with a liquid pump 5, and an inlet pipe of the liquid pump 5 is connected with an outlet of the condensing plate 2; the outlet pipe of the liquid pump 5 is matched with the stirring mechanism.
Preferably, the conduit 3 is of an inverted funnel-shaped structure, and a plurality of guide posts 31 are connected to the inclined surface of the inner wall of the conduit 3.
Further, the refrigerator 4 is a screw type industrial water chiller with the model of SCY-220 AS.
Further, the number of the guide pipes 3 is plural, and the guide pipes 3 are used for raising the BOG gas in the tank 1 into the BOG buffer chamber.
Preferably, the stirring mechanism comprises a stirring shaft 61 rotatably connected with the inner wall of the tank body 1, and a plurality of stirring blades 62 are connected with the outer surface of the stirring shaft 61 at equal intervals.
Further, the stirring mechanism can be provided with 2-3 groups at different heights, and meanwhile, a branch pipe is connected to an outlet pipe of the liquid pump 5 through a plurality of three-way valves, and a plurality of branch pipes are separated to be matched with different stirring mechanisms.
Preferably, the outlet pipe end of the liquid pump 5 extends into the tank 1, and the outlet pipe end of the liquid pump 5 is connected with a nozzle 51, and the nozzle 51 faces the stirring blade 62 of the stirring mechanism.
Further, the nozzle 51 is inclined downward toward the stirring blade 62 and forms a certain angle, and when in use, the jet flow sprayed by the nozzle 51 can agitate the LNG liquid at the bottom layer, and meanwhile, a certain flow is formed in the LNG liquid to drive the stirring blade 62 to rotate.
The working principle of the LNG storage tank for preventing the layering of the liquefied natural gas is as follows:
when the LNG tank is used, the BOG gas evaporated in the LNG tank body 1 floats to a buffer zone and is discharged from the BOG discharge pipe 11, the BOG gas passes through the condensation plate 2 in the rising process, is refrigerated by the condensation plate 2, part of the BOG gas is condensed again, and liquid formed on the guide column 31 on the inner wall of the guide pipe 3 drops back into the storage tank; the liquid pump 5 pumps LNG at the upper layer in the storage tank to enter the refrigerator 4, the refrigerator 4 cools liquid and then flows through the condensing plate 2 to provide a cold source for the condensing plate 2, then the liquid pump circulates to the bottom of the storage tank, and the stirring shaft 61 is driven to rotate by the flowing of the LNG liquid driven by jet flow at the outlet end of the liquid pump 5.
Claims (4)
1. An LNG storage tank for preventing liquefied natural gas from layering comprises a tank body (1), wherein a BOG discharge pipe (11) is connected to the top of the tank body (1); the upper part of the inner wall of the tank body (1) is connected with a condensing plate (2), and a BOG buffer chamber is arranged between the condensing plate (2) and the upper top cover; a protective shell (12) is sleeved on the outer surface of the tank body (1); the method is characterized in that: the condensing plate (2) is of a hollow structure, and an inlet and an outlet are respectively arranged at two ends of the condensing plate (2); the inner wall of the condensing plate (2) is connected with a plurality of guide pipes (3) which penetrate through the upper side and the lower side of the condensing plate (2); the upper part of the inner wall of the protective shell (12) is connected with a refrigerator (4), one end of the refrigerator (4) is connected with a liquid inlet pipe (41), and the liquid inlet pipe (41) extends into the tank body (1); the other end of the refrigerator (4) is connected with a liquid outlet pipe (42), and the liquid outlet pipe (42) is communicated with the inlet of the condensing plate (2); the inner wall of a protective shell (12) at the other side of the tank body (1) is connected with a liquid pump (5), and an inlet pipe of the liquid pump (5) is connected with an outlet of the condensing plate (2); the outlet pipe of the liquid pump (5) is matched with the stirring mechanism.
2. An LNG storage tank for preventing delamination of liquefied natural gas according to claim 1, wherein: the guide pipe (3) is of an inverted funnel-shaped structure, and a plurality of guide posts (31) are connected to the inclined plane of the inner wall of the guide pipe (3).
3. An LNG storage tank for preventing delamination of liquefied natural gas according to claim 1, wherein: the stirring mechanism comprises a stirring shaft (61) rotationally connected with the inner wall of the tank body (1), and a plurality of stirring blades (62) are connected to the outer surface of the stirring shaft (61) at equal intervals.
4. An LNG storage tank for preventing delamination of liquefied natural gas according to claim 1, wherein: the outlet pipe end of the liquid pump (5) extends into the tank body (1), the outlet pipe end of the liquid pump (5) is connected with a nozzle (51), and the nozzle (51) faces to a stirring blade (62) of the stirring mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321130357.2U CN220102844U (en) | 2023-05-11 | 2023-05-11 | LNG storage tank capable of preventing liquefied natural gas from layering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321130357.2U CN220102844U (en) | 2023-05-11 | 2023-05-11 | LNG storage tank capable of preventing liquefied natural gas from layering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220102844U true CN220102844U (en) | 2023-11-28 |
Family
ID=88868768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321130357.2U Active CN220102844U (en) | 2023-05-11 | 2023-05-11 | LNG storage tank capable of preventing liquefied natural gas from layering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220102844U (en) |
-
2023
- 2023-05-11 CN CN202321130357.2U patent/CN220102844U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108187540B (en) | Liquid cosmetic mixing process processing system | |
| CN112569893B (en) | Gasification sulfur trioxide dehydration is with cyclization cauldron | |
| CN111204885A (en) | Riverway ecological management and restoration device | |
| CN220102844U (en) | LNG storage tank capable of preventing liquefied natural gas from layering | |
| CN216418334U (en) | Evaporator with film distribution function | |
| CN210127097U (en) | Water injection, deoxidization and degassing water treatment machine for oil field | |
| CN201598284U (en) | Efficient and energy-saving antibiotic fermentation tank | |
| CN86207978U (en) | Fluid jet vacuvm pump | |
| CN109368726B (en) | Floating island type coupled wind power sea water desalination system | |
| CN107142200A (en) | Dry and wet combines integral anaerobic installation for fermenting and anaerobic ferment process | |
| CN212720373U (en) | Absorber of lithium bromide refrigerating unit | |
| CN202558663U (en) | Distillation type seawater desalting equipment | |
| CN207254076U (en) | A kind of band strengthens hybrid reaction and catches the full charge absorption tower of juice function | |
| CN104163459B (en) | Household water filter | |
| CN208040671U (en) | A kind of integral type oilless (oil free) compressor | |
| CN111573826A (en) | Energy-saving sewage treatment pond that treatment effect is good | |
| CN201653022U (en) | Heat exchanger for solution ice slurry | |
| CN111838312A (en) | Milk fermentation tank with excellent heat exchange performance | |
| CN220338236U (en) | BOG liquefaction heating device | |
| CN203833659U (en) | Distilling type water purifier | |
| CN105709446B (en) | A kind of quick bittern water evaporation process equipment of high-altitude punching press rotary tower type | |
| CN214457865U (en) | Wine brewing distillation equipment | |
| CN216482377U (en) | Waste heat power generation cooling tower in cement clinker production process | |
| CN219252430U (en) | Jet type liquid mixing equipment device | |
| CN2760472Y (en) | Open type ice-making device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |