CN211010763U - L NG storage tank with gas separation and mass storage functions - Google Patents
L NG storage tank with gas separation and mass storage functions Download PDFInfo
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- CN211010763U CN211010763U CN201921468698.4U CN201921468698U CN211010763U CN 211010763 U CN211010763 U CN 211010763U CN 201921468698 U CN201921468698 U CN 201921468698U CN 211010763 U CN211010763 U CN 211010763U
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Abstract
The utility model discloses an L NG storage tank of component gas matter storage this L NG storage tank includes outer jar, inner tank, cold insulation layer and pipe-line system, the inside of outer jar sets up the inner tank, set up the cold insulation layer between outer jar with the inner tank, the inner tank passes through the nickel steel sheet and is divided into poor component jar and rich component jar, pipe-line system includes discharge conduit, defeated pipeline and BOG pipeline, be divided into respectively in poor component jar and the rich component jar discharge conduit, and equally divide and set up defeated pipeline respectively, defeated pipeline carries out the defeated outward to L NG through the low-pressure pump, the BOG pipeline runs through the top of outer jar with the inner tank, makes the gaseous phase space between poor component jar and the rich component jar be linked together.
Description
Technical Field
The utility model relates to a L NG storage tank of branch gas matter storage belongs to liquefied natural gas transmission and distribution technical field.
Background
The liquefied natural gas is a product formed by removing water, sulfur, heavy hydrocarbons and impurities from natural gas and then cooling to minus 162 ℃ under normal pressure, and is characterized by being pure, colorless, tasteless, nontoxic and noncorrosive. Because of its high energy density and convenient transportation, it is widely used in the fields of transportation, industry, commerce, urban storage and peak regulation, etc. The liquefied natural gas has different compositions due to different production places, CH4High content of so-called lean component, CH4L NG poor, density, boiling temperature, heat value and other physical properties of the rich component have difference, and the poor component has smaller density and lower heat value.
All L NG storage tanks built at present are only provided with 1 inner tank as a unique storage space, which causes inconvenience to storage and production operation of L NG, and mainly is characterized in that 1) before a wharf L NG ship discharges L NG storage tanks, the discharging mode needs to be determined according to the density of a current storage L3 NG medium in L NG storage tanks and the density of L NG on the ship, if the density value of L NG on the ship is larger than the density value of L NG in the tank, upper feeding is selected so that L NG with large density on the ship can be fully merged with L in the tank, if the density value of L NG on the ship is smaller than L NG density value in the tank, lower feeding is selected so that L NG with small density on the ship cannot be mixed in the upper part of the liquid level of the storage tank, and directly enters the bottom of the tank, 2) when the storage tanks are stored in L NG, the density and temperature of media in the storage tanks need to be monitored frequently so that the storage tanks are prevented from generating a large amount of boil-off gas in the storage tanks, and even the storage tanks are polluted by mechanical safety valves, and even the storage tanks are caused by the pollution caused by the phenomenon of the same mechanical safety valve, and the storage tanks.
In summary, since the conventional L NG storage tank has only 1 inner tank design, the risk of production operation and management is increased in the process of storing L NG different components, and thus a L NG storage tank capable of achieving sub-gas storage is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a L NG storage tank of branch gas matter storage, the utility model discloses realize separately the storage with poor component and rich component, have safer, more convenient advantage than traditional pattern.
The utility model provides an L NG storage tank for gas separation and mass storage, wherein the L NG storage tank comprises an outer tank, an inner tank, a cold insulation layer and a pipeline system;
the inner tank is arranged in the outer tank; the cold insulation layer is arranged between the outer tank and the inner tank;
the inner tank is divided into a lean component tank and a rich component tank through a nickel steel plate;
the pipeline system comprises a discharge pipeline, an outward conveying pipeline and a BOG pipeline, wherein the discharge pipeline is respectively arranged in the lean component tank and the rich component tank, the outward conveying pipeline is respectively arranged in the lean component tank and the rich component tank, L NG is outward conveyed through a low-pressure pump by the outward conveying pipeline, and the BOG pipeline penetrates through the tops of the outer tank and the inner tank to enable a gas phase space between the lean component tank and the rich component tank to be communicated.
In the L NG storage tank, the outer tank consists of a bearing platform, an outer tank wall and a dome;
the top of the inner tank is provided with a suspended ceiling;
the cold insulation layer comprises a perlite layer, an elastic felt and glass wool; the elastic felt is arranged outside the tank wall of the inner tank, and the perlite layer is arranged between the elastic felt and the outer tank wall; the glass wool is arranged on the upper part of the suspended ceiling, and the BOG pipeline penetrates through the glass wool; and the foam glass brick layer is arranged between the bottom of the inner tank and the bearing platform.
The utility model discloses in, the BOG pipeline runs through the dome the furred ceiling with glass is cotton, makes the poor component jar with the gas phase space between the rich component jar is linked together.
In the L NG storage tank, the discharge pipeline, the export pipeline and the BOG pipeline are all provided with valves, and the valves are used for controlling the opening and closing of the pipelines and adjusting the pipelines according to process requirements.
In the L NG storage tank, the nickel steel plate is made of 5-9% by mass of nickel steel material, specifically, 9% by mass of nickel steel material, 7% by mass of nickel steel material or 5% by mass of nickel steel material.
The utility model has the advantages of it is following:
through the arrangement, the operation steps that different components need to select different unloading modes according to the components during unloading can be omitted, and the operation items that medium density needs to be monitored frequently in the storage process of L NG to prevent layering and rolling can be omitted, so that the production operation and management risks are reduced, and the structure is safer and more convenient than the structure of only one traditional inner tank.
Drawings
Fig. 1 is a schematic structural diagram of an L NG storage tank for gas mass storage according to the present invention.
The individual labels in the figure are as follows:
1, a bearing platform; 2 outer tank wall; 3, a dome; 4 lean component tank; 5 a rich component sub-tank; 6, hanging the ceiling; 7 nickel steel plate; 8 a low pressure pump; 9 perlite layer; 10, elastic felt; 11 glass wool; 12 a discharge duct; 13 an external delivery pipeline; 14BOG pipelines; 15 layers of foam glass bricks.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
As shown in FIG. 1, the L NG storage tank for gas separation and mass storage of the present invention is a schematic structural diagram, the L NG storage tank comprises four parts, namely an outer tank, an inner tank, a cold insulation layer and a pipeline system.
The outer tank consists of a bearing platform 1, an outer tank wall 2 and a dome 3.
The inner tank is arranged in the outer tank and is divided into a lean component sub-tank 4 and a rich component sub-tank 5 through a nickel steel plate 7, and the lean component sub-tank and the rich component sub-tank are respectively used for storing lean components and rich components. The top of the inner tank is provided with a suspended ceiling 6.
The cold insulation layer comprises a perlite layer 9, an elastic felt 10 and glass wool 11; an elastic felt 10 is arranged outside the tank wall of the inner tank, and a perlite layer 9 is arranged between the elastic felt 10 and the outer tank wall 2; the upper part of the suspended ceiling 6 is provided with glass wool 11; a foam glass brick layer 15 is arranged between the bottom of the inner tank and the bearing platform 1.
The pipeline system comprises a discharge pipeline 12, an outward conveying pipeline 13 and a BOG pipeline 14, the discharge pipeline 12 is respectively arranged in each of the lean component tank 4 and the rich component tank 5, when discharging is carried out, the L NG ship informs a receiving station operator of the density of L NG on the ship, the operator judges that the lean component or the rich component belongs to the lean component or the rich component, the corresponding discharge pipeline 12 is selected immediately, the outward conveying pipeline 13 is respectively arranged in each of the lean component tank 4 and the rich component tank 5, the outward conveying pipeline conducts outward conveying to L NG through the 13 low-pressure pump 8, and when conducting outward conveying, the low-pressure pump 8 in each of the lean component tank 4 and the rich component tank 5 is respectively started to conduct outward conveying to L NG.
A BOG pipe 14 runs through the dome 3, the ceiling 6 and the glass wool 11, communicating 5 the gas phase space between the lean component tank 4 and the rich component tank 5.
Further, the discharge pipeline 12, the export pipeline 13 and the BOG pipeline 14 are all provided with valves for controlling the pipeline to be opened and closed, and the valves are used for controlling the pipeline to be opened and closed and adjusting according to the process requirements.
Further, the nickel steel plate can be made of 5-9% by mass of nickel steel material, specifically 9% by mass of nickel steel material, 7% by mass of nickel steel material or 5% by mass of nickel steel material.
Claims (4)
1. An L NG storage tank for storing gas components is characterized in that the L NG storage tank comprises an outer tank, an inner tank, a cold insulation layer and a pipeline system;
the inner tank is arranged in the outer tank; the cold insulation layer is arranged between the outer tank and the inner tank;
the inner tank is divided into a lean component tank and a rich component tank through a nickel steel plate;
the pipeline system comprises a discharge pipeline, an outward conveying pipeline and a BOG pipeline, wherein the discharge pipeline is respectively arranged in the lean component tank and the rich component tank, the outward conveying pipeline is respectively arranged in the lean component tank and the rich component tank, L NG is outward conveyed through a low-pressure pump by the outward conveying pipeline, and the BOG pipeline penetrates through the tops of the outer tank and the inner tank to enable a gas phase space between the lean component tank and the rich component tank to be communicated.
2. The L NG storage tank of claim 1, wherein the outer tank is comprised of a platform, an outer tank wall, and a dome;
the top of the inner tank is provided with a suspended ceiling;
the cold insulation layer comprises a perlite layer, an elastic felt and glass wool; the elastic felt is arranged outside the tank wall of the inner tank, and the perlite layer is arranged between the elastic felt and the outer tank wall; the glass wool is arranged on the upper part of the suspended ceiling, and the BOG pipeline penetrates through the glass wool; a foam glass brick layer is arranged between the bottom of the inner tank and the bearing platform;
the BOG pipeline penetrates through the dome and is arranged between the dome and the suspended ceiling.
3. The L NG storage tank of claim 1 or claim 2, wherein the discharge pipeline, the export pipeline and the BOG pipeline are valved.
4. The L NG storage tank of claim 1 or 2, wherein the nickel steel plate is made of 5-9% by mass of nickel steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921468698.4U CN211010763U (en) | 2019-09-04 | 2019-09-04 | L NG storage tank with gas separation and mass storage functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921468698.4U CN211010763U (en) | 2019-09-04 | 2019-09-04 | L NG storage tank with gas separation and mass storage functions |
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| Publication Number | Publication Date |
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| CN211010763U true CN211010763U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921468698.4U Active CN211010763U (en) | 2019-09-04 | 2019-09-04 | L NG storage tank with gas separation and mass storage functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469765A (en) * | 2019-09-04 | 2019-11-19 | 中海石油气电集团有限责任公司 | A kind of LNG storage tank of point of makings storage |
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2019
- 2019-09-04 CN CN201921468698.4U patent/CN211010763U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469765A (en) * | 2019-09-04 | 2019-11-19 | 中海石油气电集团有限责任公司 | A kind of LNG storage tank of point of makings storage |
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