CN105953069A - Liquefied natural gas storage tank capable of preventing liquid from writhing and generating overpressure - Google Patents
Liquefied natural gas storage tank capable of preventing liquid from writhing and generating overpressure Download PDFInfo
- Publication number
- CN105953069A CN105953069A CN201610496194.8A CN201610496194A CN105953069A CN 105953069 A CN105953069 A CN 105953069A CN 201610496194 A CN201610496194 A CN 201610496194A CN 105953069 A CN105953069 A CN 105953069A
- Authority
- CN
- China
- Prior art keywords
- heat pipe
- natural gas
- lng tank
- tank
- liquid
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a liquefied natural gas storage tank capable of preventing liquid from writhing and generating overpressure. Heat pipes installed in the vertical direction are arranged in the liquefied natural gas storage tank. The lower ends of the heat pipes are connected with the tank bottom of the liquefied natural gas storage tank. The upper ends of the heat pipes are higher than the liquefied natural gas liquid level in the liquefied natural gas storage tank. The liquefied natural gas storage tank has the beneficial effects that heat is transmitted through the finned heat pipes with high heat conductivity, the temperature of bottom liquid and upper liquid in the liquefied natural gas storage tank is balanced, the situation that the bottom liquid of the storage tank is excessively saturated can be effectively avoided, and a writhing phenomenon of the storage tank is avoided.
Description
Technical field
The invention belongs to liquefied natural gas facility, particularly relate to a kind of LNG tank preventing liquid from seething superpressure.
Background technology
Along with natural gas applications is popularized, liquefied natural gas application fast development, a large amount of LNG tanks are employed.In large-scale LNG tank, liquid causes liquid to seethe superpressure due to upper and lower temperature difference；Or during tank bottom fire, tank bottom is heated rapidly vaporization, producing a large amount of gases at storage tank lower curtate, that causes the liquid in LNG tank seethes phenomenon.Due to the tank bottoms heat transfer in LNG tank, the heat that bottom imports can not effectively be sent out by the Evapotranspiration of liquefied natural gas, the liquefied natural gas making bottom is heated, produce supersaturation, density contrast is formed with the liquid on storage tank top, when density contrast reaches to a certain degree, storage tank will produce and violent seethe phenomenon.Seethe and cause substantial amounts of LNG(liquefied natural gas) gasification, pressure of storage tank raises and has explosion danger.The phenomenon churned mechanically mode of many employings seethed in existing minimizing large-scale storage tank or mechanical assistance circulation, but, this mode consumes power.
Summary of the invention
The purpose of the present invention is to propose to the technical scheme of a kind of LNG tank preventing liquid from seething superpressure, prevent liquefied natural gas in the tank produced because of tank bottoms being heated seethes superpressure phenomenon.
To achieve these goals, the technical scheme is that a kind of LNG tank preventing liquid from seething superpressure, the heat pipe vertically installed it is provided with in LNG tank, the lower end of described heat pipe is connected with the tank bottoms of LNG tank, and the upper end of described heat pipe exceeds the liquefied natural gas liquid level in LNG tank.
Further, being provided with branched described heat pipe in LNG tank, described many heat pipes are that every square metre of planimetric area is no less than 0.3 in the distribution density that LNG tank is tank bottoms.
Further, the working medium of described inside heat pipe is natural gas, and the pressure at normal temperatures of the working medium in described heat pipe is 6MPa.
Further, described inside heat pipe has the liquid natural gas working medium of 10% when-120 DEG C.
Further, described heat pipe external diameter is provided with fin, and the upper end of every described heat pipe is connected with the tank deck of LNG tank by an adapter sleeve.
Further, described heat pipe is the heat pipe of pressure low temperature resistant material, and described fin is the metal material fin with good heat conductive performance.
The invention has the beneficial effects as follows: use the heat pipe transmission heat of the high thermal conductivity with fin, tank bottoms liquid and the temperature of upper liquid in balance LNG tank, can effectively solve the oversaturated situation of tank bottom liquid, it is to avoid storage tank seethes the generation of phenomenon.
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is heat pipe structure figure of the present invention；
Fig. 3 is heat pipe sectional drawing of the present invention；
Fig. 4 is heat pipe working state schematic representation of the present invention；
Fig. 5 is the heat pipe of the present invention scattergram in LNG tank.
Detailed description of the invention
As shown in Figure 1, Figure 2, a kind of LNG tank preventing liquid from seething superpressure, the heat pipe 20 vertically installed it is provided with in LNG tank 10, the lower end of described heat pipe is connected with tank bottoms the 11 of LNG tank, and the upper end of described heat pipe exceeds the liquefied natural gas liquid level 12 in LNG tank.
Being provided with branched described heat pipe in LNG tank, described many heat pipes are that every square metre of planimetric area is no less than 0.3 in the distribution density that LNG tank is tank bottoms.
The working medium of described inside heat pipe is natural gas, and the pressure at normal temperatures of the working medium in described heat pipe is 6MPa.
Described inside heat pipe has the liquid natural gas working medium of 10% when-120 DEG C.
Described heat pipe external diameter is provided with fin 21, and the upper end of every described heat pipe is connected with the tank deck 13 of LNG tank by an adapter sleeve 22.
Described heat pipe is the heat pipe of pressure low temperature resistant material, and described fin is the metal material fin with good heat conductive performance.
Embodiment one:
Such as Fig. 1 to Fig. 5, a kind of LNG tank preventing liquid from seething superpressure.
The LNG tank 10 of the present embodiment be diameter D be the circular storage tank of 9 meters, storage tank be provided around heat-insulation layer 14.
25 heat pipes 20 vertically installed it are provided with in LNG tank.
As shown in Figure 2, Figure 3, Figure 4, heat pipe external diameter is provided with fin 21, the diameter D1=50mm of heat pipe, and the two ends of heat pipe are spherical, to adapt to the high pressure produced under normal temperature condition inside it, the outer radius R1=60mm of fin.The material of heat pipe is 304 rustless steels, and fin is the aluminum alloy fin with good heat conductive performance.The working medium of inside heat pipe is natural gas, and the pressure at normal temperatures of the working medium in heat pipe is 6MPa.Inside heat pipe has the liquid natural gas working medium 24 of 10% when-120 DEG C, and heat pipe can keep the liquid phase working fluid of 10%～15% under the low temperature environment of LNG tank, enables heat pipe efficient operation.Use natural gas can ensure the safety of device and liquefied natural gas as the working medium of heat pipe, even if heat pipe is damaged also will not produce any adverse consequences.
The lower end of heat pipe is connected with tank bottoms the 11 of LNG tank, and the fin of heat pipe is also connected with the tank bottoms of LNG tank, and the upper end of heat pipe exceeds the liquefied natural gas liquid level 12 in LNG tank.The upper end of every described heat pipe is connected with the tank deck 13 of LNG tank by an adapter sleeve 22, adapter sleeve is welded on the tank deck of LNG tank, the upper end of heat pipe is inserted in adapter sleeve, when heat pipe is produced radial expansion by variations in temperature, the upper end of heat pipe can be moved in adapter sleeve, eliminates expansive force.Adapter sleeve can fix heat pipe from upper end makes it avoid bending and swing.
As it is shown in figure 5,25 only include a heat pipe at center, 8 heat pipes of inner ring and 16 heat pipes of outer ring, 25 heat pipes are every square metre of planimetric area 0.4 in the distribution density that LNG tank is tank bottoms.
As shown in Figure 4, the bottom of heat pipe is evaporation ends, the upper bit condenser of heat pipe.When LNG tank irrigates liquefied natural gas for the first time, the Temperature of Working in heat pipe is reduced to the temperature of liquefied natural gas in LNG tank, and now bottom heat pipe, the natural gas working medium of evaporation ends is liquid phase 24, and the natural gas working medium of top condenser is gas phase 25；nullWhen LNG tank is because of external factor (heat conduction、Fill) make liquefied natural gas liquid bottom it produce supersaturation，At this moment natural gas storage tank top LNG temperature is less than bottom LNG temperature，At this moment the natural gas working medium of heat pipe bottom evaporation ends absorbs the heat gasification of LNG tank lower liquid，Natural gas working medium after gasification rises to heat pipe condenser，The natural gas working medium heat release liquefaction of heat pipe top，The natural gas working medium of liquefaction relies on gravity to flow back to the evaporation ends bottom heat pipe，Heat bottom LNG tank is transported to LNG tank top by such circulation by the natural gas working medium in heat pipe，Heat bottom LNG tank is effectively taken to LNG tank top，Effectively solve the oversaturated situation of LNG tank bottom liquid，Avoid storage tank and seethe the generation of phenomenon.
Claims (6)
1. one kind prevents the LNG tank that liquid seethes superpressure, it is characterized in that, the heat pipe vertically installed it is provided with in LNG tank, the lower end of described heat pipe is connected with the tank bottoms of LNG tank, and the upper end of described heat pipe exceeds the liquefied natural gas liquid level in LNG tank.
A kind of LNG tank preventing liquid from seething superpressure the most according to claim 1, it is characterized in that, being provided with branched described heat pipe in LNG tank, described many heat pipes are that every square metre of planimetric area is no less than 0.3 in the distribution density that LNG tank is tank bottoms.
A kind of LNG tank preventing liquid from seething superpressure the most according to claim 1, it is characterised in that the working medium of described inside heat pipe is natural gas, the pressure at normal temperatures of the working medium in described heat pipe is 6MPa.
A kind of LNG tank preventing liquid from seething superpressure the most according to claim 3, it is characterised in that described inside heat pipe has the liquid natural gas working medium of 10% when-120 DEG C.
A kind of LNG tank preventing liquid from seething superpressure the most according to claim 1, it is characterised in that described heat pipe external diameter is provided with fin, the upper end of every described heat pipe is connected with the tank deck of LNG tank by an adapter sleeve.
A kind of LNG tank preventing liquid from seething superpressure the most according to claim 5, it is characterised in that described heat pipe is the heat pipe of pressure low temperature resistant material, described fin is the metal material fin with good heat conductive performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610496194.8A CN105953069B (en) | 2016-06-30 | 2016-06-30 | A kind of LNG tank for preventing liquid from seething superpressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610496194.8A CN105953069B (en) | 2016-06-30 | 2016-06-30 | A kind of LNG tank for preventing liquid from seething superpressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105953069A true CN105953069A (en) | 2016-09-21 |
| CN105953069B CN105953069B (en) | 2018-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610496194.8A Active CN105953069B (en) | 2016-06-30 | 2016-06-30 | A kind of LNG tank for preventing liquid from seething superpressure |
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| CN (1) | CN105953069B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106813095A (en) * | 2017-03-27 | 2017-06-09 | 中国石油大学(华东) | A kind of LNG storage tank rolling restraining device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3748865A (en) * | 1971-04-06 | 1973-07-31 | Chicago Bridge & Iron Co | Storage tank for liquefied gas having bottom insulation gas shielding |
| JPH07119898A (en) * | 1993-10-26 | 1995-05-12 | Tokyo Gas Co Ltd | Roll over preventive device in cryogenic liquid storage tank |
| JPH08282787A (en) * | 1995-04-07 | 1996-10-29 | Ishikawajima Harima Heavy Ind Co Ltd | Cryogenic liquefied gas tank |
| CN102733838A (en) * | 2011-04-11 | 2012-10-17 | 王中来 | Cooling device of mine hedge facility |
| CN202521218U (en) * | 2012-03-12 | 2012-11-07 | 四川金科深冷设备工程有限公司 | Low-temperature storage tank for LNG (Liquefied Natural Gas) car gas filling station |
| CN102878425A (en) * | 2012-10-23 | 2013-01-16 | 张家港富瑞特种装备股份有限公司 | Device for avoiding liquid layering in liquefied natural gas storage tank |
| CN104315328A (en) * | 2014-10-08 | 2015-01-28 | 中国海洋石油总公司 | Special-shaped self-supporting type LNG storage tank suitable for concrete caisson |
| CN105570663A (en) * | 2016-02-19 | 2016-05-11 | 新奥科技发展有限公司 | LNG (Liquefied Natural Gas) storage tank assembly and LNG temperature control method |
-
2016
- 2016-06-30 CN CN201610496194.8A patent/CN105953069B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3748865A (en) * | 1971-04-06 | 1973-07-31 | Chicago Bridge & Iron Co | Storage tank for liquefied gas having bottom insulation gas shielding |
| JPH07119898A (en) * | 1993-10-26 | 1995-05-12 | Tokyo Gas Co Ltd | Roll over preventive device in cryogenic liquid storage tank |
| JPH08282787A (en) * | 1995-04-07 | 1996-10-29 | Ishikawajima Harima Heavy Ind Co Ltd | Cryogenic liquefied gas tank |
| CN102733838A (en) * | 2011-04-11 | 2012-10-17 | 王中来 | Cooling device of mine hedge facility |
| CN202521218U (en) * | 2012-03-12 | 2012-11-07 | 四川金科深冷设备工程有限公司 | Low-temperature storage tank for LNG (Liquefied Natural Gas) car gas filling station |
| CN102878425A (en) * | 2012-10-23 | 2013-01-16 | 张家港富瑞特种装备股份有限公司 | Device for avoiding liquid layering in liquefied natural gas storage tank |
| CN104315328A (en) * | 2014-10-08 | 2015-01-28 | 中国海洋石油总公司 | Special-shaped self-supporting type LNG storage tank suitable for concrete caisson |
| CN105570663A (en) * | 2016-02-19 | 2016-05-11 | 新奥科技发展有限公司 | LNG (Liquefied Natural Gas) storage tank assembly and LNG temperature control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106813095A (en) * | 2017-03-27 | 2017-06-09 | 中国石油大学(华东) | A kind of LNG storage tank rolling restraining device |
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| Publication number | Publication date |
|---|---|
| CN105953069B (en) | 2018-06-29 |
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