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LNG storage tank and inner tank thereof

An inner tank and storage tank technology, applied in the field of liquefied natural gas storage container equipment, can solve problems such as affecting construction and installation, affecting the mechanical performance of LNG storage tanks, etc., and achieve the effect of low cost and reasonable application.

Pending Publication Date: 2020-06-09
CNOOC GAS & POWER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the setting method of prestress on the wall of the reinforced concrete inner tank structure will affect the construction and installation of other structures of the storage tank and the prestressing system of the inner tank wall. If the setting is not proper, it will affect the performance of the mechanical performance of the entire LNG storage tank

Method used

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  • LNG storage tank and inner tank thereof
  • LNG storage tank and inner tank thereof
  • LNG storage tank and inner tank thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0056] According to an embodiment of the present invention, the side of the buttress column is provided with an anchor system, and the anchor system is fixed with prestressed tendons.

[0057] Every two buttress columns arranged at 180 degrees in the circumferential direction are used to fix a group of anchor points of the prestressed tendons.

[0058] According to an embodiment of the present invention, the wall of the inner tank is provided with channels for prestressed tendons, and the two ends of the prestressed tendons are respectively fixed on the anchor system, and the two ends of each of the prestressed tendons One end of each leads out from the anchoring systems on both sides of the same buttress column, and then crosses through the prestressed tendon channel in the inner tank.

[0059] The above-mentioned prestressed tendons fixed on the buttress columns form the circumferential prestressed tendons of the inner tank.

[0060] According to an embodiment of the presen...

Embodiment

[0071] A LNG storage tank, such as Figure 1 to Figure 4 As shown, it mainly includes prestressing system, concrete outer tank 1, concrete inner tank 8 (including built-in buttress column), concrete cap 5, concrete dome 6, cold insulation system, pipe network airtight system 9, liquid bearing Pressure system 13.

[0072] The prestressing system of the above-mentioned airtight full-concrete LNG full-capacity storage tank equipment adopts 1×7 standard steel strands with a diameter of 15.7mm, including 12-25 strands and other different types.

[0073] The outer tank 1 of the above-mentioned airtight full-concrete LNG full-capacity storage tank equipment is a cylindrical prestressed reinforced concrete structure with a height-to-diameter ratio of 0.6 and a wall thickness of 0.8m. The material is C40 or C50 strength grade concrete, and the inner side is used Low temperature resistant steel material, the structure can withstand low temperature below -40°, without cold and brittle f...

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Abstract

The invention relates to an LNG storage tank and an inner tank thereof. The inner tank is of a cylindrical structure with an opening in the top and a flat bottom, wherein the inner tank is of a reinforced concrete structure; buttress columns are arranged on the inner wall of the cylindrical structure and protrude towards the interior of the tank on the inner wall; and the plurality of columns arearranged on the inner wall and used for assisting in arranging a prestress system. According to the LNG storage tank and the inner tank thereof, prestress ribs can be well fixed, prestress of the inner tank of the storage tank is reasonably applied, construction and installation of other structures are better facilitated through the installation structure position, safety and stability of the whole system are guaranteed, the engineering amount is small, and cost is low.

Description

technical field [0001] The invention relates to the technical field of liquefied natural gas (LNG) storage container equipment, in particular to an LNG storage tank and an inner tank thereof. Background technique [0002] Liquefied natural gas (LNG) full-capacity storage tank is the large-scale core equipment of the LNG receiving station, and it completes the collection, storage and transportation of the LNG receiving station together with the LNG unloading system, LNG export system, and BOG processing system. The main structure of a conventional LNG full-containment storage tank consists of two parts: an outer tank and an inner tank. Among them, the outer tank is a prestressed reinforced concrete structure with LNG air-tight and liquid-tight performance, which ensures the safe operation of the storage tank at low temperature and normal pressure, and controls the BOG (boil-off gas) loss of the storage tank within an economically reasonable range; the inner tank Usually, X7N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C3/04F17C3/06
CPCF17C3/04F17C3/06F17C2203/0308F17C2203/0614F17C2203/0678
Inventor 黄欢张超段品佳范嘉堃李欣欣张莹王佳音
Owner CNOOC GAS & POWER GRP
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