CN114413161A - LNG holds storage tank entirely with pump well groove cold insulation system - Google Patents

LNG holds storage tank entirely with pump well groove cold insulation system Download PDF

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Publication number
CN114413161A
CN114413161A CN202210093325.3A CN202210093325A CN114413161A CN 114413161 A CN114413161 A CN 114413161A CN 202210093325 A CN202210093325 A CN 202210093325A CN 114413161 A CN114413161 A CN 114413161A
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CN
China
Prior art keywords
tank
pump well
cold insulation
lng
inner tank
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.)
Pending
Application number
CN202210093325.3A
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Chinese (zh)
Inventor
张超
扬帆
张博超
计宁宁
黄欢
钟曦
赵铭睿
夏梦莹
李宇航
李安琪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNOOC Gas and Power Group Co Ltd
Original Assignee
CNOOC Gas and Power Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CNOOC Gas and Power Group Co Ltd filed Critical CNOOC Gas and Power Group Co Ltd
Priority to CN202210093325.3A priority Critical patent/CN114413161A/en
Publication of CN114413161A publication Critical patent/CN114413161A/en
Pending legal-status Critical Current

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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
    • 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
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0345—Fibres
    • F17C2203/035—Glass wool
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0678—Concrete

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  • 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 an LNG full-capacity storage tank with a pump well slot cold insulation system, which comprises: concrete cushion cap and inner tank, the lower extreme of inner tank is fixed on the concrete cushion cap, the inner tank includes the inner tank bottom plate, the concrete cushion cap with be provided with cold insulation pressure bearing layer between the inner tank bottom plate, be provided with the pump well collecting tank on the inner tank bottom plate for hold the pump well, be provided with elasticity cold insulation layer in the pump well collecting tank. According to the invention, the elastic cold insulation material is arranged around the liquid collecting tank of the pump well, and when the inner tank is precooled and contracted, the elastic cold insulation layer can be contracted, so that the deformation of the bottom plate of the inner tank is counteracted, and the displacement generated by the contraction of the inner tank is compensated, so that the integral cold insulation structure of the storage tank cannot be out of work due to larger deformation.

Description

LNG holds storage tank entirely with pump well groove cold insulation system
Technical Field
The invention relates to an LNG (liquefied natural gas) full-capacity storage tank with a pump well slot cold insulation system, and belongs to the technical field of natural gas storage.
Background
In the LNG industry chain, storage of LNG is a very important link. The LNG storage tank is the most key core equipment, and not only stores a large amount of LNG, but also plays a buffering role for stabilizing the gas supply. Along with the increase of the tank capacity of the storage tank, the construction cost of the storage tank per unit volume is in a descending trend, and the scale effect is obvious; meanwhile, the increase of the tank capacity can also improve the land utilization rate (the occupied area per unit volume is reduced) more efficiently and reduce the BOG evaporation rate of the storage tank to a greater extent. In addition, with the development of LNG related technologies and materials and the construction planning of national overall natural gas storage infrastructure, the development of large-scale LNG storage tanks will be the main development trend of the storage tank technology of LNG receiving stations in China.
LNG storage tanks can increase the effective tank capacity by increasing the height. But the requirement for seismic fortification in partial areas is high, so that the height of the storage tank is limited. The bottom of the conventional LNG storage tank is sequentially provided with a 9% Ni steel plate, a dry sand leveling layer, a foam glass brick, a concrete leveling layer and the like from top to bottom, and the flat-plate tank bottom structure can have cavitation erosion allowance of nearly two meters high and cannot fully utilize the tank capacity.
Disclosure of Invention
In order to solve the technical problems, the invention provides an LNG (liquefied natural gas) full-capacity storage tank with a pump well groove cold insulation system, wherein elastic cold insulation materials (such as elastic felt, glass wool and the like) are arranged around a pump well liquid collection groove of the storage tank, and when an inner tank is precooled and contracted, an elastic cold insulation layer can be contracted, so that the deformation of a bottom plate of the inner tank is counteracted, and the integral cold insulation structure of the storage tank cannot be failed due to larger deformation.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a LNG holds storage tank entirely with pump well groove cold insulation system, includes:
concrete cushion cap and inner tank, the lower extreme of inner tank is fixed on the concrete cushion cap, the inner tank includes the inner tank bottom plate, the concrete cushion cap with be provided with cold insulation pressure bearing layer between the inner tank bottom plate, be provided with the pump well collecting tank on the inner tank bottom plate for hold the pump well, be provided with elasticity cold insulation layer in the pump well collecting tank.
The LNG full-capacity storage tank preferably has a compression deformation rate of the elastic cold insulation layer of not less than 50%.
Preferably, the thickness of the elastic cold insulation layer of the LNG full-capacity storage tank is 100-200 mm on the bottom surface and 200-800 mm on the side surface.
Preferably, the LNG storage tank is formed by processing an elastic cold insulation layer made of a material including an elastic felt or glass wool.
Preferably, the cold insulation pressure bearing layer of the LNG full-capacity storage tank is a glass brick layer, and the glass brick layer is composed of foam glass bricks and pressure-resistant glass bricks.
Preferably, the pressure-resistant glass bricks are laid below and around the pump well liquid collecting tank, and the foam glass bricks are laid on the periphery of the pressure-resistant glass bricks.
The LNG full-capacity storage tank, preferably, the laying range of the pressure-resistant glass bricks is: the central point of the pump well liquid collecting tank is used as the center, and the thickness of the layer is not less than 1800 mm.
Preferably, the pressure-bearing capacity of the pressure-bearing glass brick of the LNG full-capacity storage tank is not lower than 2.4MPa on average.
The LNG full-capacity storage tank is preferably characterized in that a lining plate is further arranged at the bottom of the storage tank between the cold insulation pressure bearing layer and the concrete bearing platform.
The LNG storage tank preferably has at least one of a square shape, a circular shape, a regular polygonal shape, and an irregular shape.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention sets a liquid collecting groove at the lower part of the inner tank pump well, and the pump well can be extended into the liquid collecting groove. The height of the pump well is lower than that of the bottom plate of the inner tank in the center of the storage tank, the lowest design liquid level of the storage tank is reduced under the condition that the cavitation allowance of the pump well is not changed, and the heights of the inner tank and the outer tank of the storage tank can be reduced.
2. Under the condition that the overall height of the storage tank is not changed, the net volume of the storage tank can be increased by reducing the lowest design liquid level of the storage tank, so that the storage efficiency of the storage tank is improved.
3. According to the invention, the elastic cold insulation material (such as elastic felt, glass wool and the like) is arranged around the pump well liquid collecting tank, and when the inner tank is precooled and contracted, the elastic cold insulation layer can be contracted, so that the deformation of the bottom plate of the inner tank is counteracted, and the displacement generated by the contraction of the inner tank is compensated, so that the integral cold insulation structure of the storage tank cannot be failed due to larger deformation.
4. According to the invention, the glass brick cold insulation material around the pump well liquid collecting tank is a pressure-bearing type glass brick, the load of the inner tank bottom plate is transmitted to the glass brick cold insulation material through the elastic cold insulation material, and the pressure-bearing type glass brick can bear stronger load, so that the storage tank cold insulation material can work normally.
Drawings
Fig. 1 is an LNG full-capacity storage tank with a pump well slot cold insulation system according to an embodiment of the present invention;
the reference numbers in the figures are as follows:
1-a pump well; 2-pump well collecting tank; 3-elastic cold insulation layer; 4-inner tank bottom plate; 5-foam glass brick; 6-pressure-resistant glass brick; 7-concrete bearing platform.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," "third," "fourth," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As shown in fig. 1, the LNG full-capacity storage tank with a pump well slot cold insulation system provided by the present invention comprises: concrete cushion cap 7 and inner tank, the lower extreme of inner tank is fixed on concrete cushion cap 7, and the inner tank includes inner tank bottom plate 4, is provided with cold insulation pressure bearing layer between concrete cushion cap 7 and the inner tank bottom plate 4, is provided with pump well collecting tank 2 on the inner tank bottom plate 4 for hold pump well 1, be provided with elasticity cold insulation layer 3 in the pump well collecting tank 2.
In a preferred embodiment of the present invention, the elastic cold-retention layer 3 has a compression set of 50%.
In a preferred embodiment of the invention, the thickness of the elastic cold-retention layer 3 is: the bottom thickness is 150mm, and the side thickness is 400 mm.
In a preferred embodiment of the invention, the elastic cold insulation layer 3 is manufactured from a material comprising elastic felt or glass wool.
In a preferred embodiment of the invention, the cold insulation pressure bearing layer is a glass brick layer, and the glass brick layer is composed of foam glass bricks 5 and pressure resistant glass bricks 6.
In a preferred embodiment of the invention, pressure-resistant glass blocks 6 are laid under and around the pump well sump 2, and foam glass blocks 5 are laid on the periphery of the pressure-resistant glass blocks 6.
In a preferred embodiment of the present invention, the laying range of the pressure-resistant glass blocks 6 is: with the center point of the pump well liquid collecting tank 2 as the center, 1800mm is paved outwards.
In a preferred embodiment of the present invention, the pressure-bearing capacity of the pressure-resistant glass block 6 is 2.4 MPa.
In a preferred embodiment of the invention, a storage tank bottom lining is also arranged between the cold insulation pressure bearing layer and the concrete bearing platform 7.
In a preferred embodiment of the invention, the pump well sump 2 is at least one of square, circular, regular polygonal or irregular in shape.
In the invention, the tank capacity of the LNG full-capacity storage tank is 1-30 ten thousand square, and the LNG full-capacity storage tank comprises an overground, semi-underground or underground full-capacity storage tank form; the depth of the pump well liquid collecting tank 2 is 0.5-1 meter, the diameter of the pump well liquid collecting tank 2 is 1-10 meters when the pump well liquid collecting tank 2 is circular, the volume of the pump well liquid collecting tank 2 is 2-100 cubic meters when the pump well liquid collecting tank 2 is irregular, and the number of pump wells 1 in the pump well liquid collecting tank 2 is 1-5; the thickness of the concrete bearing platform 7 is 1-3 m.
The invention also provides a specific implementation method of the LNG full-capacity storage tank with the pump well slot cold insulation system, which comprises the following steps:
(1) and (3) constructing a concrete bearing platform 7, reserving a groove at the bearing platform below the storage tank pump well 1, and enabling a sufficient construction space to exist during the construction of the subsequent pump well liquid collection groove 2.
(2) And (3) constructing a lining plate at the bottom of the storage tank, wherein the lining plate is paved along the upper surface of the concrete bearing platform 7 by adopting a flat plate welding scheme, and the lining plate covers the groove of the concrete bearing platform 7.
(3) And (3) constructing a glass brick cold insulation layer on the upper part of the concrete bearing platform 7, paving glass bricks in the groove of the concrete bearing platform 7, adopting pressure-resistant glass bricks in the groove of the concrete bearing platform 7 and near the groove, adopting foam glass bricks between the pressure-resistant glass bricks and the wall of the inner tank, and enabling the glass bricks to resist the shrinkage load of the inner tank.
(4) The inner bottom surface and the side surface of the pump well liquid collecting groove 2 are provided with elastic cold insulation layers (such as elastic felt, glass wool and the like) for construction, and the elastic cold insulation materials at least can compensate deformation caused by precooling and shrinkage of the inner tank. According to related project experience, the pre-cooling shrinkage of the inner tank of the 16 ten thousand square LNG storage tank is about 100mm and 150 mm. The elastic felt had a compression set of about 50%.
(5) The construction of the inner tank bottom plate 4 of the storage tank (the inner tank bottom plate 4 covers the elastic cold insulation layer 3), and a flat plate welding mode is still adopted. The inner tank bottom plate 4 is provided with a pump well liquid collecting groove 2 at the bottom of the pump well. The inner tank wall plate 4 can still adopt the existing mature technology and materials by adopting a flat plate welding form, and the construction difficulty of the inner tank of the storage tank cannot be increased.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a LNG holds storage tank entirely with pump well groove cold insulation system which characterized in that includes:
concrete cushion cap (7) and inner tank, the lower extreme of inner tank is fixed on the concrete cushion cap (7), the inner tank includes inner tank bottom plate (4), concrete cushion cap (7) with be provided with cold insulation pressure bearing layer between inner tank bottom plate (4), be provided with pump well collecting tank (2) on inner tank bottom plate (4) for hold pump well (1), be provided with elasticity cold insulation layer (3) in pump well collecting tank (2).
2. LNG tanlc tank according to claim 1, characterized in that the elastic cold-retention layer (3) has a compression set of not less than 50%.
3. LNG tanlc tank according to claim 1, characterized in that the thickness of the elastic cold insulation layer (3) is: the bottom surface is 100 mm-200 mm, and the side surface is 200-800 mm.
4. LNG tank according to claim 1, characterized in that the elastic cold insulation layer (3) is processed from a material comprising elastic felt or glass wool.
5. LNG full-capacity storage tank according to claim 1, characterized in that the cold-insulation pressure-bearing layer is a glass brick layer, which consists of foam glass bricks (5) and pressure-resistant glass bricks (6).
6. LNG tank as claimed in claim 5, characterized in that the pressure-resistant glass bricks (6) are laid under and around the pump well sump (2), and the foam glass bricks (5) are laid on the periphery of the pressure-resistant glass bricks (6).
7. The LNG tank as claimed in claim 6, wherein the pressure-resistant glass blocks (6) are laid in the following ranges: the central point of the pump well liquid collecting tank (2) is used as the center, and the thickness is not less than 1800 mm.
8. LNG full-capacity storage tank according to claim 5, characterized in that the pressure-bearing capacity of the pressure-resistant glass blocks (6) is not less than 2.4MPa on average.
9. LNG full-capacity storage tank according to claim 1, characterized in that a storage tank bottom lining is further arranged between the cold insulation pressure bearing layer and the concrete cap (7).
10. LNG tanlc according to claim 1, characterized in that the pump well sump (2) is at least one of square, circular, regular polygonal or irregular shaped.
CN202210093325.3A 2022-01-26 2022-01-26 LNG holds storage tank entirely with pump well groove cold insulation system Pending CN114413161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210093325.3A CN114413161A (en) 2022-01-26 2022-01-26 LNG holds storage tank entirely with pump well groove cold insulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210093325.3A CN114413161A (en) 2022-01-26 2022-01-26 LNG holds storage tank entirely with pump well groove cold insulation system

Publications (1)

Publication Number Publication Date
CN114413161A true CN114413161A (en) 2022-04-29

Family

ID=81277423

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210093325.3A Pending CN114413161A (en) 2022-01-26 2022-01-26 LNG holds storage tank entirely with pump well groove cold insulation system

Country Status (1)

Country Link
CN (1) CN114413161A (en)

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