CN108302322B - Gas output pipeline of liquefied natural gas storage tank - Google Patents
Gas output pipeline of liquefied natural gas storage tank Download PDFInfo
- Publication number
- CN108302322B CN108302322B CN201810065503.5A CN201810065503A CN108302322B CN 108302322 B CN108302322 B CN 108302322B CN 201810065503 A CN201810065503 A CN 201810065503A CN 108302322 B CN108302322 B CN 108302322B
- Authority
- CN
- China
- Prior art keywords
- output pipeline
- gas
- gas output
- liquefied natural
- heat
- 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.)
- Expired - Fee Related
Links
Images
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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- 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
-
- 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 discloses a gas output pipeline of a liquid natural gas storage tank, which is horizontally arranged, wherein the upper part of the cross section of the gas output pipeline is in an arc shape, and the lower part of the cross section of the gas output pipeline is provided with a steady flow part which gradually reduces towards the direction far away from the upper part; the gas output pipeline conducts heat to liquefied natural gas inside the gas output pipeline, the liquefied natural gas is heated, gasified and absorbs the heat, the temperature of the gas transmission pipeline is reduced, the air close to the outer surface of the gas output pipeline conducts the heat to the gas output pipeline, the density is increased after the air temperature is reduced, cold air flows downwards along the surface of the flow stabilizing part under the action of gravity, the vortex or turbulence generated by the cold air below the bottom surface of the flow stabilizing part is smaller, the retention of the cold air below the bottom surface of the gas output pipeline can be reduced, the hot air can conduct the heat to the gas output pipeline more quickly, frost condensed on the surface of the gas output pipeline is reduced, and then the hot air is heated to conduct heat to the gas output pipeline again, and virtuous cycle is formed.
Description
Technical Field
The invention relates to a liquid natural gas storage tank, in particular to a fuel gas output pipeline of the liquid natural gas storage tank.
Background
The liquid natural gas storage tank is an LNG storage tank for short, and is of a double-layer structure, vacuum is formed between an inner container and an outer layer, and the inner container is used for storing low-temperature (about-162 ℃) liquid natural gas.
In the prior art, as shown in fig. 1 and 2, a gas output pipe assembly is arranged around the outside of a liquefied natural gas storage tank 1, the gas output pipe assembly includes a gas output pipe 2 and an upper output pipe 3 which are horizontally arranged, and both the gas output pipe 2 and the upper output pipe 3 are circular rings with break gaps and are arranged around the liquefied natural gas storage tank 1; the gas output pipeline 2 is linked together through transition pipe 4 between the last output tube 3, and the vertical setting of transition pipe 4, transition pipe 4 have many and around 1 circumference evenly distributed of liquefied natural gas storage tank. One end of the gas output pipeline 2 is fixedly communicated with a lower communicating pipe 5, and the lower communicating pipe 5 is communicated with the bottom of the liquefied natural gas in the liquefied natural gas storage tank 1; an upper communicating pipe 6 is fixedly communicated with one end of the upper output pipe 3, and the upper communicating pipe 6 is communicated with the top of the inner space of the liquefied natural gas storage tank 1.
The liquefied natural gas flows out of the liquefied natural gas storage tank 1 through the lower communicating pipe 5, enters the gas output pipeline 2 and is gradually gasified to form gaseous gas, the volume of the heated gas is gradually increased, and the gas pressure in the upper output pipe 3 is increased; liquefied natural gas in the liquefied natural gas storage tank 1 reduces gradually, and inside space crescent, atmospheric pressure reduces gradually, and after inside atmospheric pressure reduces to a certain extent, liquefied natural gas can't flow out to gas output pipeline 2 again in, and the gas can be to the inside supplementary pressure of liquefied natural gas storage tank 1 after 6 entering liquefied natural gas storage tanks 1 from last communicating pipes, makes liquefied natural gas flow out to gas output pipeline 2 more easily. The upper communicating pipe 6 is communicated with a conveying pipeline 7, and the other part of the fuel gas can be conveyed to the combustion equipment of the user through the conveying pipeline 7 for the user to use.
Absorb a large amount of heats after the gas gasification, make 2 temperature reductions of gas output pipeline, gas output pipeline 2 absorbs the heat from the air, and vapor in the air condenses gradually on 2 surfaces of gas output pipeline after being close to microthermal gas output pipeline 2, and after the longer time, 2 surfaces of gas output pipeline can condense the thick frost of one deck, hinder air phase gas output pipeline 2 heat conduction.
The liquefied natural gas can not be gasified in time in the output pipe and gradually flows into the transition pipe 4, after the transition pipe 4 contacts the liquefied natural gas, the liquefied natural gas is gasified to absorb heat, the temperature of the transition pipe 4 is reduced, the water vapor in the air is gradually condensed on the outer surface of the transition pipe 4, and after a long time, the outer surface of the transition pipe 4 can be gradually condensed to form a layer of frost.
The frost gradually is towards keeping away from gas output pipeline 2's direction along transition pipe 4 and is stretched, the frost thickness that 4 surfaces of transition pipe condensed is closer to gas output pipeline 2 more thickly, the frost hinders liquefied natural gas from absorbing the heat in the air, liquefied natural gas can not in time gasify after getting into transition pipe 4, along with the frost upwards "stretch" along gas output pipeline 2, liquefied natural gas's liquid level in transition pipe 4 risees gradually, after the liquid level reaches a take the altitude, liquefied natural gas's in the transition pipe 4 hydraulic pressure reaches the equilibrium with the hydraulic pressure in liquefied natural gas storage tank 1, liquefied natural gas in the liquefied natural gas storage tank 1 flows into gas output pipeline 2 and is hindered, influence the transport of natural gas.
Disclosure of Invention
The invention aims to provide a gas output pipeline of a liquefied natural gas storage tank, which has the advantages that hot air can more quickly conduct heat to the gas output pipeline, frost condensed on the surface of the gas output pipeline is reduced, and then the hot air is accelerated to conduct heat to the gas output pipeline, so that virtuous cycle is formed.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a gas output pipeline of liquefied natural gas storage tank, gas output pipeline level sets up, and gas output pipeline's cross section upper portion is circular-arc, and gas output pipeline's cross section lower part is equipped with stationary flow portion, and stationary flow portion diminishes towards the direction of keeping away from upper portion gradually.
Through the technical scheme, the heat is conducted to the liquefied natural gas in the gas output pipeline through the gas output pipeline, the liquefied natural gas is heated, gasified and absorbs the heat, the temperature of the gas transmission pipeline is reduced, the air close to the outer surface of the gas output pipeline conducts the heat to the gas output pipeline, the density is increased after the temperature of the air is reduced, the cold air flows downwards along the surface of the flow stabilizing part under the action of gravity, the vortex or turbulence generated by the cold air below the bottom surface of the flow stabilizing part is smaller, the retention of the cold air below the bottom surface of the gas output pipeline can be reduced, the hot air can conduct the heat to the gas output pipeline more quickly, the frost condensed on the surface of the gas output pipeline is reduced, and then the hot air is heated to conduct the heat to the gas output pipeline; the liquefied natural gas in the gas output pipeline can be gasified in time, and the problem that the liquefied natural gas cannot be gasified in the gas output pipeline after being filled with the gas output pipeline due to increase of the liquefied natural gas is solved.
The invention is further configured to: the outer surface of the gas output pipeline is fixedly connected with heat conducting fins which are uniformly distributed along the length direction of the gas output pipeline.
Through above-mentioned technical scheme, the area of contact between heat-conducting strip can increase gas output pipeline and the air, increases the speed of air to gas output pipeline heat conduction.
The invention is further configured to: the heat conducting fins are perpendicular to the fuel gas output pipeline.
Through above-mentioned technical scheme, the air can not receive the hindrance of conducting strip to the direction flow in-process that is close to ground, can increase the speed that the stationary flow portion surface flows along the air, increases the speed of air to gas output pipeline heat conduction.
The invention is further configured to: the interior of the heat conducting fin is of a hollow structure, and the inner cavity of the heat conducting fin is filled with coolant.
Through above-mentioned technical scheme, the coolant has higher coefficient of heat conductivity, and after hot-air conducted the heat for the conducting strip, the conducting strip can conduct the heat for the coolant, and the coolant has higher coefficient of heat conductivity, can conduct the heat for gas output pipeline fast.
The invention is further configured to: the inside fixedly connected with heat-conducting plate of gas output pipeline, the heat-conducting plate is around the circular arc central axis evenly distributed of gas output pipeline.
Through above-mentioned technical scheme, the heat-conducting plate can increase the area of contact between gas output pipeline and the inside liquefied natural gas of gas output pipeline or the gas, and the heat-conducting plate can conduct the liquefied natural gas or the gas of the inside different positions of gas output pipeline with the heat fast evenly, makes the liquefied natural gas of different positions department be heated evenly, can take place the gasification more in time.
The invention is further configured to: the heat-conducting plate is arranged along the length direction of the fuel gas output pipeline.
Through above-mentioned technical scheme, can reduce liquefied natural gas or the resistance that receives along the gas output pipeline flow in-process, improve because of the position that flows the obstructed position that leads to of gas output pipeline entry is full of liquefied natural gas's problem.
The invention is further configured to: gaps are arranged between the edges of the adjacent heat conducting plates, which are close to each other.
Through above-mentioned technical scheme, when liquefied natural gas's liquid level was higher than the edge that adjacent heat-conducting plate was close to each other, liquefied natural gas accessible this clearance gets into in the space on liquefied natural gas pipeline upper portion, can improve because of the gas output pipeline lower part space leads to liquefied natural gas to be difficult to take place the problem of gasification after being full of liquefied natural gas.
The invention is further configured to: the heat-conducting plate is of a hollow structure, and a coolant is filled in an inner cavity of the heat-conducting plate.
Through above-mentioned technical scheme, the coolant has higher coefficient of heat conductivity, and gas output pipeline can give the coolant with heat conduction, and the coolant can be fast gives the different positions of heat-conducting plate with heat conduction, makes the heat-conducting plate conduct the heat fast and more evenly for liquefied natural gas or the gas of different positions departments, accelerates liquefied natural gas's gasification.
The invention is further configured to: the outer surface of the gas output pipeline is fixedly connected with a heat conducting fin which is of a hollow structure; the heat-conducting plate is fixedly connected inside the gas output pipeline and is of a hollow structure; the gas output pipeline is provided with a through hole which is communicated with the inner cavity of the heat conducting plate and the inner cavity of the heat conducting fin, and the inner cavity of the heat conducting plate and the inner cavity of the heat conducting fin are both filled with coolant.
Through above-mentioned technical scheme, coolant accessible through-hole exchanges between the inner chamber of heat-conducting plate and the inner chamber of conducting strip and flows, conducts the heat of conducting strip for the heat-conducting plate fast.
The invention is further configured to: one end of the gas output pipeline is communicated with a lower communicating pipe, and the other end of the gas output pipeline is communicated with a transition pipe; the lower communicating pipe is communicated with the bottom of the liquefied natural gas storage tank, and one end, far away from the gas output pipeline, of the transition pipe is communicated with the top of the liquefied natural gas storage tank.
By the technical scheme, the gasification speed of the liquefied natural gas in the fuel gas output pipeline is increased, the fuel gas output pipeline cannot be filled with the liquefied natural gas, the number of the transition pipes can be reduced to one, the input cost of the transition pipes is reduced, the pipe arrangement is simplified, the position of gas leakage is easy to find out when the problems of gas leakage and the like occur, and the maintenance is convenient; the transition pipe is fixedly communicated with one end, far away from the lower communicating pipe, of the fuel gas output pipeline, so that the path length of the liquefied natural gas or the fuel gas from the lower communicating pipe to the transition pipe can be increased, and the liquefied natural gas or the fuel gas can absorb more heat from air in the movement process of the liquefied natural gas or the fuel gas in the fuel gas output pipeline; the liquefied natural gas is gasified and then enters a gas output pipeline, the volume of the gas is increased after the gas is heated, and the gas pressure is increased; inside liquefied natural gas of liquefied natural gas storage tank reduces gradually, and the volume of inner space crescent, the gas accessible in the transition pipe goes up communicating pipe and gets into inside the liquefied natural gas storage tank for the inside supplementary pressure of liquefied natural gas storage tank, improves because of the inside atmospheric pressure of liquefied natural gas storage tank crosses lowly and leads to the liquefied natural gas of liquefied natural gas storage tank inside to be difficult to the problem that flows out to the gas output pipeline in.
In conclusion, the invention has the following beneficial effects:
1. the upper part of the cross section of the gas output pipeline is arc-shaped, the lower part of the cross section of the gas output pipeline is provided with a flow stabilizing part, the flow stabilizing part is gradually reduced towards the direction far away from the upper part, the retention of cold air below the bottom surface of the gas output pipeline can be reduced, hot air can more quickly conduct heat to the gas output pipeline, frost condensed on the surface of the gas output pipeline is reduced, and then the hot air is accelerated to conduct heat to the gas output pipeline, so that a virtuous cycle is formed; the liquefied natural gas in the gas output pipeline can be gasified in time, so that the problem that the liquefied natural gas cannot be gasified in the gas output pipeline after being filled with the gas output pipeline due to increase of the liquefied natural gas is solved;
2. the heat-conducting fins can increase the contact area between the gas output pipeline and the air and increase the heat-conducting speed of the air to the gas output pipeline;
3. the heat conducting plate can increase the contact area between the gas output pipeline and the liquefied natural gas or gas in the gas output pipeline, and can quickly and uniformly conduct heat to the liquefied natural gas or gas at different positions in the gas output pipeline, so that the liquefied natural gas at different positions is uniformly heated, and the gasification can be more timely carried out;
4. the coolant has a high heat conductivity coefficient, the fuel gas output pipeline can conduct heat to the coolant, and the coolant can conduct heat to different positions of the heat conducting plate quickly, so that the heat conducting plate can conduct heat to the liquefied natural gas or fuel gas at different positions quickly and uniformly to accelerate the gasification of the liquefied natural gas;
5. the coolant has a high heat conductivity coefficient, after the hot air conducts heat to the heat-conducting fins, the heat-conducting fins can conduct the heat to the coolant, and the coolant has a high heat conductivity coefficient and can quickly conduct the heat to the fuel gas output pipeline;
6. the coolant can flow between the inner cavity of the heat conducting plate and the inner cavity of the heat conducting fin in an exchange manner through the through holes, and the heat of the heat conducting fin is quickly conducted to the heat conducting plate.
Drawings
FIG. 1 is a schematic illustration of a prior art fitting relationship between a gas export pipeline and a liquefied natural gas storage tank;
FIG. 2 is a schematic representation of a prior art embodiment of a lower communication tube configuration;
FIG. 3 is a schematic diagram of a gas pipeline according to the prior art;
FIG. 4 is a schematic cross-sectional view of a gas outlet pipe in example 1;
FIG. 5 is a schematic view showing the cross-sectional structure of the heat-conducting plate and the heat-conducting fin in example 1;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
FIG. 7 is a schematic view showing a connection structure between the heat-conductive plate and the heat-conductive sheet and the through-hole in example 2;
FIG. 8 is a cross-sectional view B-B of FIG. 7;
FIG. 9 is a schematic view showing the installation relationship between the liquefied natural gas storage tank and the flue gas outlet pipeline in example 3;
fig. 10 is a cross-sectional view of C-C in fig. 9.
In the figure, 1, a liquid natural gas storage tank; 2. a gas output pipeline; 21. a flow stabilizing part; 22. a heat conductive sheet; 23. a heat conducting plate; 24. a through hole; 3. an upper output pipe; 4. a transition duct; 5. a lower communicating pipe; 6. an upper communicating pipe; 7. a delivery conduit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
To facilitate an understanding of the present invention, a brief description of the prior art is provided for the structure and operation thereof. As shown in fig. 1 and 2, a gas output pipe assembly is arranged around the outside of the liquefied natural gas storage tank 1, the gas output pipe assembly comprises a gas output pipeline 2 and an upper output pipe 3 which are horizontally arranged, and the gas output pipeline 2 and the upper output pipe 3 are both in a ring shape with a break gap and arranged around the liquefied natural gas storage tank 1; be equipped with transition pipe 4 between gas output pipeline 2 and the last output tube 3, be linked together through transition pipe 4 between gas output pipeline 2 and the last output tube 3, the vertical setting of transition pipe 4, transition pipe 4 have many and around 1 circumference evenly distributed of liquefied natural gas storage tank. One end of the gas output pipeline 2 is fixedly communicated with a lower communicating pipe 5, and the lower communicating pipe 5 is communicated with the bottom of the liquefied natural gas in the liquefied natural gas storage tank 1; an upper communicating pipe 6 is fixedly communicated with one end of the upper output pipe 3, and the upper communicating pipe 6 is communicated with the top of the inner space of the liquefied natural gas storage tank 1.
The liquefied natural gas flows out of the liquefied natural gas storage tank 1 through the lower communicating pipe 5, enters the gas output pipeline 2 and is gradually gasified to form gaseous gas, the volume of the heated gas is gradually increased, the gas pressure in the upper output pipe 3 is increased, and a part of the gas can enter the liquefied natural gas storage tank 1 through the upper communicating pipe 6; liquefied natural gas in the liquefied natural gas storage tank 1 reduces gradually, inside space crescent, atmospheric pressure reduces gradually, reduces to a certain extent after inside atmospheric pressure, liquefied natural gas can't flow out to gas output pipeline 2 again in, the gas from last communicating pipe 6 get into liquefied natural gas storage tank 1 after can be to the inside supplementary pressure of liquefied natural gas storage tank 1, the atmospheric pressure of upper portion space in the increase liquefied natural gas storage tank 1 makes liquefied natural gas flow out to gas output pipeline 2 more easily. The upper communicating pipe 6 is communicated with a conveying pipeline 7, and the other part of the fuel gas can be conveyed to the combustion equipment of the user through the conveying pipeline 7 for the user to use.
Absorb a large amount of heats after the gas gasification, make 2 temperature reductions of gas output pipeline, gas output pipeline 2 absorbs the heat from the air, and vapor in the air condenses gradually on 2 surfaces of gas output pipeline after being close to microthermal gas output pipeline 2, and after the longer time, 2 surfaces of gas output pipeline can condense the thick frost of one deck, hinder the air to gas output pipeline 2 heat conduction.
The liquefied natural gas can not be gasified in time in the output pipe and gradually flows into the transition pipe 4, after the transition pipe 4 contacts the liquefied natural gas, the liquefied natural gas is gasified to absorb heat, the temperature of the transition pipe 4 is reduced, the water vapor in the air is gradually condensed on the outer surface of the transition pipe 4, and after a long time, the outer surface of the transition pipe 4 can be gradually condensed to form a layer of frost.
The frost gradually is towards keeping away from gas output pipeline 2's direction along transition pipe 4 and is stretched, the frost thickness that 4 surfaces of transition pipe condensed is closer to gas output pipeline 2 more thickly, the frost hinders liquefied natural gas from absorbing the heat in the air, liquefied natural gas can not in time gasify after getting into transition pipe 4, along with the frost upwards "stretch" along gas output pipeline 2, liquefied natural gas's liquid level in transition pipe 4 risees gradually, after the liquid level reaches a take the altitude, liquefied natural gas's in the transition pipe 4 hydraulic pressure reaches the equilibrium with the hydraulic pressure in liquefied natural gas storage tank 1, liquefied natural gas in the liquefied natural gas storage tank 1 flows into gas output pipeline 2 and is hindered, influence the transport of natural gas.
As shown in fig. 3, the cross-sectional shape of the gas output pipe 2 in the prior art is circular, and after the liquefied natural gas flows into the gas output pipe 2, the temperature of the gas output pipe 2 decreases, the air temperature near the surface of the gas output pipe 2 gradually decreases, and the density increases after the air temperature decreases; the cold air gradually moves downwards (in the direction close to the ground) under the action of gravity, as indicated by the arrow in fig. 3, the path of the cold air movement is a path of the cold air flow, the cold air flow forms a vortex or a turbulent flow in the space below the bottom surface of the gas output pipeline 2, the cold air below the bottom surface of the gas output pipeline 2 continuously circulates and reciprocates in situ and is difficult to be discharged, and the temperature of the bottom of the gas output pipeline 2 is lower than that of the upper part; the liquefied natural gas is converged at the lower part of the gas conveying pipeline 7 under the action of gravity, as indicated by L in fig. 3, the liquefied natural gas cannot be gasified in time to form gas, and the liquefied natural gas in the gas output pipeline 2 gradually fills the gas output pipeline 2, so that the liquefied natural gas cannot be gasified in the gas output pipeline 2.
As shown in fig. 4, the cross section of the gas output pipe 2 in the present invention is an inverted raindrop shape, and the shape is not limited to the raindrop shape, and the cross section of the lower portion of the gas output pipe 2 may be a shuttle shape. Preferably, the upper portion of the gas output pipe 2 is circular in cross section, the lower portion is provided with a flow stabilizer 21 similar to a shuttle shape or a tail shape similar to a raindrop, the flow stabilizer 21 is gradually reduced towards a direction far away from the upper portion of the gas output pipe 2, the cold air can move towards a direction close to the ground (the ground is horizontal) along the flow stabilizer 21, and the flow path of the cold air is as indicated by an arrow in fig. 4. The cold air is difficult to produce swirl or torrent or the swirl and the torrent of production are very little in the bottom of stationary flow portion 21, the lower cold air of temperature can flow soon and keep away from gas output pipeline 2, the higher hot-air of temperature can constantly be to the direction motion of being close to gas output pipeline 2, give gas output pipeline 2 with the heat conduction, gas output pipeline 2 can constantly follow the air absorption heat comparatively piece by piece, for the inside liquefied natural gas gasification heat supply of gas output pipeline 2, the inside liquefied natural gas of gas output pipeline 2 can in time gasify, avoid being full of gas output pipeline 2 after liquefied natural gas increases.
Because the air flow rate near the outer surface of the gas output pipeline 2 is higher, heat can be continuously supplied to the gas output pipeline 2, and the condensed frost on the outer surface of the gas output pipeline 2 is reduced. Because frost condensation on the gas outlet pipe 2 can be reduced, the air can more easily conduct heat to the gas outlet pipe 2, forming a virtuous circle.
As shown in fig. 5 and 6, the outer surface of the gas output pipe 2 is fixedly connected with a heat conducting fin 22, the heat conducting fin 22 may be circular, the heat conducting fin 22 is perpendicular to the gas output pipe 2, and the air is not hindered by the heat conducting fin 22 in the process of flowing towards the direction close to the ground. The heat conducting fins 22 are uniformly distributed along the length direction of the fuel gas output pipeline 2; the heat-conducting fin 22 can increase the contact area between the gas output pipeline 2 and the air, the air can conduct heat to the heat-conducting fin 22 more quickly, and the heat-conducting fin 22 conducts the heat to the gas output pipeline 2.
As shown in fig. 5 and 6, a heat conducting plate 23 is fixedly connected inside the gas output pipeline 2, the heat conducting plate 23 is arranged along the length direction of the gas output pipeline 2 and is uniformly distributed around the circumference of the circular central axis of the gas output pipeline 2, the arrangement along the length direction can improve the problem that the position close to the inlet of the gas output pipeline 2 is filled with the liquefied natural gas due to the blocked flow, and the heat conducting plate 23 can increase the contact area between the liquefied natural gas and the gas output pipeline 2; after the liquefied natural gas flows into the gas output pipeline 2, the gas transmission pipeline can quickly conduct heat to the heat conduction plate 23, the heat conduction plate 23 evenly conducts the heat to the liquefied natural gas at different positions in the gas output pipeline 2, the liquefied natural gas is quickly gasified, and the problem that the liquefied natural gas cannot be gasified in the gas output pipeline 2 after being filled with the gas output pipeline 2 due to the fact that the liquefied natural gas is increased is solved.
A gap is formed between the edges of the adjacent heat conduction plates 23 which are close to each other, and when the liquid level of the liquefied natural gas is higher than the edges of the adjacent heat conduction plates 23 which are close to each other, the liquefied natural gas can enter the space at the upper part of the fuel gas output pipeline 2 through the gap; the problem that the liquefied natural gas is difficult to gasify after the lower space of the fuel gas output pipeline 2 is filled with the liquefied natural gas can be solved.
Working process
The liquefied natural gas flows out of the liquefied natural gas storage tank 1 and enters the gas output pipeline 2, the liquefied natural gas has a relatively low temperature, the liquefied natural gas absorbs heat of the gas output pipeline 2 and then is gasified and absorbs a large amount of heat, the temperature of the gas output pipeline 2 is gradually reduced, the ambient air conducts the heat to the gas output pipeline 2, the density of the air is increased after the temperature of the air is reduced, the air moves towards the direction close to the ground under the action of gravity, cold air moves along the surface of the flow stabilizing part 21, the degree of vortex or turbulence formed below the bottom surface of the flow stabilizing part 21 is very low, the cold air below the bottom surface of the gas output pipeline 2 can be quickly discharged, cold air remained below the gas output pipeline 2 is reduced, hot air with a higher temperature can be quickly supplemented below the gas output pipeline 2, the air can conduct the heat to the gas output pipeline 2 more quickly, and frost condensed on the outer surface of, because less frost condenses on the surface of the gas outlet pipe 2, the air can conduct heat to the gas outlet pipe 2 more quickly, forming a virtuous circle. The heat conducting fins 22 can increase the contact area between the gas output pipeline 2 and the air, and increase the speed of the air for conducting heat to the gas output pipeline 2; the heat conducting plate 23 can increase the contact area between the gas output pipeline 2 and the internal liquefied natural gas, increase the speed of the gas output pipeline 2 for conducting heat to the liquefied natural gas, accelerate the gasification speed of the liquefied natural gas, and improve the problem that the liquefied natural gas cannot be gasified in the gas output pipeline 2 after being full of the gas output pipeline 2.
Example 2
The difference from embodiment 1 is that, as shown in fig. 7 and 8, the heat conducting plate 23 is a hollow structure, a coolant (the coolant is not shown in the figures in order to make the connection relationship between the components in the drawings clearer) is filled in the inner cavity of the heat conducting plate 23, the coolant is a liquid or a gas with a high heat conductivity coefficient, if a liquid is used, an anti-freezing coolant or cooling oil can be used, the gas output pipeline 2 can rapidly conduct heat to the position of the heat conducting plate 23 close to the center of the gas output pipeline 2 through the coolant, so that the heat conducting plate 23 rapidly conducts the heat to the liquefied natural gas at different positions inside the gas output pipeline 2, different positions of the liquefied natural gas inside the gas output pipeline 2 are uniformly heated, and the speed of gasifying the liquefied natural gas is increased.
A through hole 24 is formed on the fuel gas output pipe, and the through hole 24 is communicated with the inner cavity of the heat conducting plate 23; the heat conducting fin 22 is of a hollow structure, the inner cavity of the heat conducting fin 22 is communicated with the through hole 24, and the inner cavity of the heat conducting fin 22 is communicated with the inner cavity of the heat conducting plate 23 through the through hole 24; the inner cavity of the heat-conductive sheet 22 is also filled with a coolant, which can exchange flow between the inner cavity of the heat-conductive sheet 22 and the inner cavity of the heat-conductive plate 23 through the through-hole 24. After the air conducts the heat to the heat-conducting fin 22, the heat-conducting fin 22 conducts the heat to the coolant, the coolant in the inner cavity of the heat-conducting fin 22 conducts the heat to the coolant in the inner cavity of the heat-conducting plate 23 quickly, the coolant conducts the heat to the heat-conducting plate 23, the heat-conducting plate 23 conducts the heat to the liquefied natural gas in the fuel gas output pipeline 2, and the gasification speed of the liquefied natural gas is increased.
Example 3
The difference from the embodiment 2 is that, as shown in fig. 9, since the gasification speed of the liquefied natural gas in the gas output pipeline 2 is increased, the gas output pipeline 2 is not filled with the liquefied natural gas, and the number of the transition pipes 4 may be one; transition pipe 4 is fixed the intercommunication mutually with gas output pipeline 2 one end of keeping away from down communicating pipe 5, can increase liquefied natural gas or gas from the path length that down communicates pipe 5 reachd transition pipe 4, liquefied natural gas or gas can absorb more heats in the air in gas output pipeline 2 in-process of moving. Referring to fig. 10, liquefied natural gas (L in fig. 10 indicates liquefied natural gas) is gasified and then enters the gas output pipeline 2, and the volume of the gas is increased and the gas pressure is increased after the gas is heated; the liquefied natural gas in the liquefied natural gas storage tank 1 gradually reduces, and the volume of inner space is crescent gradually, and the gas accessible in the transition pipe 4 goes up communicating pipe 6 and gets into 1 inside supplementary pressure for liquefied natural gas storage tank 1 of liquefied natural gas storage tank, avoids leading to liquefied natural gas in the liquefied natural gas storage tank 1 inside to be difficult to flow out to in the gas output pipeline 2 because of the inside atmospheric pressure of liquefied natural gas storage tank 1 hangs down.
The input cost of the transition pipe 4 can be reduced by reducing the number of the transition pipes 4, the pipe distribution can be simplified, the position of air leakage can be found out more easily when the problems such as air leakage occur, and the maintenance is convenient.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a gas output pipeline of liquefied natural gas storage tank which characterized by: the gas output pipeline (2) is horizontally arranged, the upper part of the cross section of the gas output pipeline (2) is arc-shaped, the lower part of the cross section of the gas output pipeline (2) is provided with a steady flow part (21), the steady flow part (21) is gradually reduced towards the direction far away from the upper part, the outer surface of the gas output pipeline (2) is fixedly connected with a heat conducting fin (22), and the heat conducting fin (22) is of a hollow structure; a heat-conducting plate (23) is fixedly connected inside the gas output pipeline (2), and the heat-conducting plate (23) is of a hollow structure; the gas output pipeline (2) is provided with a through hole (24) which is communicated with the inner cavity of the heat conducting plate (23) and the inner cavity of the heat conducting fin (22), and the inner cavity of the heat conducting plate (23) and the inner cavity of the heat conducting fin (22) are filled with coolant.
2. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 1, wherein: the outer surface of the gas output pipeline (2) is fixedly connected with heat conducting fins (22), and the heat conducting fins (22) are uniformly distributed along the length direction of the gas output pipeline (2).
3. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 2, wherein: the heat conducting fins (22) are perpendicular to the gas output pipeline (2).
4. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 2, wherein: the interior of the heat conducting fin (22) is of a hollow structure, and a coolant is filled in the inner cavity of the heat conducting fin (22).
5. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 1, wherein: the gas output pipeline (2) is internally and fixedly connected with a heat-conducting plate (23), and the heat-conducting plate (23) is uniformly distributed around the circular arc central axis of the gas output pipeline (2).
6. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 5, wherein: the heat conducting plate (23) is arranged along the length direction of the fuel gas output pipeline (2).
7. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 6, wherein: gaps are arranged between the edges of the adjacent heat-conducting plates (23) which are close to each other.
8. The gas outlet pipe for the liquefied natural gas storage tank as claimed in claim 5, wherein: the heat conduction plate (23) is of a hollow structure, and a coolant is filled in the inner cavity of the heat conduction plate (23).
9. The gas outlet pipe for the liquefied natural gas storage tank as claimed in any one of claims 1 to 8, wherein: one end of the gas output pipeline (2) is communicated with a lower communicating pipe (5), and the other end of the gas output pipeline is communicated with a transition pipe (4); the lower communicating pipe (5) is communicated with the bottom of the liquefied natural gas storage tank (1), and one end, far away from the gas output pipeline (2), of the transition pipe (4) is communicated with the top of the liquefied natural gas storage tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065503.5A CN108302322B (en) | 2018-01-23 | 2018-01-23 | Gas output pipeline of liquefied natural gas storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065503.5A CN108302322B (en) | 2018-01-23 | 2018-01-23 | Gas output pipeline of liquefied natural gas storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108302322A CN108302322A (en) | 2018-07-20 |
| CN108302322B true CN108302322B (en) | 2020-02-07 |
Family
ID=62866095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810065503.5A Expired - Fee Related CN108302322B (en) | 2018-01-23 | 2018-01-23 | Gas output pipeline of liquefied natural gas storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108302322B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826351Y (en) * | 2005-06-08 | 2006-10-11 | 山东中大空调集团有限公司 | Close type cooling tower coil pipe |
| CN102878842A (en) * | 2012-10-24 | 2013-01-16 | 中国航天科技集团公司第五研究院第五一0研究所 | Novel initiative jet cooling device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101264500B1 (en) * | 2010-12-03 | 2013-05-14 | 경상대학교산학협력단 | De-icing apparatus for vaporizer with enclosed walls |
| KR20130064194A (en) * | 2011-12-08 | 2013-06-18 | 삼성중공업 주식회사 | System for maintenance liquefied natural gas and liquefied petroleum gas storage tank for ship |
| CN102889813B (en) * | 2012-10-19 | 2014-09-10 | 合肥通用机械研究院 | Double-finned tube combined heat exchange component for high efficiency vaporizer |
| US9327261B2 (en) * | 2013-12-04 | 2016-05-03 | L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude | Apparatus for decreasing SMR tube temperature |
-
2018
- 2018-01-23 CN CN201810065503.5A patent/CN108302322B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826351Y (en) * | 2005-06-08 | 2006-10-11 | 山东中大空调集团有限公司 | Close type cooling tower coil pipe |
| CN102878842A (en) * | 2012-10-24 | 2013-01-16 | 中国航天科技集团公司第五研究院第五一0研究所 | Novel initiative jet cooling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108302322A (en) | 2018-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104775910B (en) | A kind of temperature control device of South Pole power module | |
| CN109539851B (en) | Modularized self-adjusting heat pipe flue gas waste heat recovery system | |
| CN108302322B (en) | Gas output pipeline of liquefied natural gas storage tank | |
| CN201449198U (en) | Anti-icing heat exchanging pipe | |
| CN201724572U (en) | Closed cooler | |
| CN210399547U (en) | Fused salt emptying device of fused salt linear Fresnel type heat collector | |
| CN103807601B (en) | LNG air bath gasifier | |
| CN207634536U (en) | A kind of heat dissipation bearing spider | |
| CN105546343A (en) | System and method for gasifying LNG (Liquefied Natural Gas) by utilizing solar heat pump | |
| CN205049029U (en) | From pressure release heat pipe heat exchange unit and adopt modularization circulative cooling system of this heat pipe heat exchange unit | |
| CN208797412U (en) | A kind of durable pedestal of DC power supply panel | |
| CN206469747U (en) | A kind of dimethyl ether high-effect cooling device | |
| CN105674783A (en) | Jet type LNG vaporization system utilizing geothermal energy | |
| CN105651104A (en) | Anti-frosting LNG air-heated nanofluid heat exchange pipe | |
| CN104482793A (en) | Open rack vaporizer heat exchange tube capable of thermoelectrically recovering cold energy from LNG (Liquefied Natural Gas) | |
| CN206582881U (en) | A kind of flue cooling back blowing device | |
| CN104864612A (en) | Superconductive flat plate solar water heater | |
| CN210486591U (en) | Vaporizer with high-efficient heat transfer function | |
| CN207866039U (en) | A kind of evaporation type fin heat exchanger | |
| CN204667327U (en) | The pneumatic water-cooling heat radiating device of computer | |
| CN220955734U (en) | Tangential air curtain cooling device of quick-closing valve of small steam turbine | |
| CN219346435U (en) | Steam overflow preventing device for deaerator overflow pipe | |
| CN221323685U (en) | Crude oil conveying pipeline heating integrated device | |
| CN208564652U (en) | A kind of expansion sump heating blanket gas | |
| CN204253208U (en) | Heat-pipe internal-combustion engine waste gas afterheat recovery unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |