High capacity underground oil storage

Abstract

The great capacity underground oil reservoir has a cylindrical reservoir with floating roof and closed prestress dome structure; an integral foundation comprising a pile footing, anchor shafts, a concrete layer and a steel plate layer; a cylindrical wall comprising curtain piles, a concrete layer, a steel plate layer and anchor shafts; and a reservoir bottom comprising a pile footing, a reinforcing concrete floor and a steel plate layer. It has steady foundation, high integral strength, capacity as large as 400 kilo cubic meters, high safety, low construction cost and other advantages.

Description

technical field [0001] The invention belongs to storage devices for crude oil, refined oil, liquefied petroleum gas and liquid chemicals. Background technique [0002] Storage tanks are petroleum, refined oil, liquefied petroleum gas and various liquid chemical storage equipment. my country's "Code for Design of Petroleum Depots" (GB50074-2002) stipulates: (1) Oil storage tanks are built on the ground. (2) The total volume of the first-level oil storage is 100,000 cubic meters, the total volume of the second-level oil storage is 30,000-100,000 cubic meters, and the volume of the third-level oil storage is 10,000-30,000 cubic meters. (3) The total capacity of the same floating roof tank group should not exceed 600,000 cubic meters. (4) The fire distance between floating roof oil tanks is 24 meters. At present, the volume of the largest ground single-disc floating roof storage tank in China is 100,000 cubic meters, and the volume of the largest ground storage tank known int...

AI Technical Summary

Problems solved by technology

Considering national security, environmental protection and economy, the current oil storage depot standards can no longer meet the needs of economic development, and the development of underground, large-scale, high-reliability oil storage depots has become an inevitable trend

[0003] The main problems of large-scale oil storage tanks on the ground are: (1) High cost of storage tanks: The large-scale storage tanks put forward high performance requirements for tank materials, such as high strength, high impact force, low impurity content, weldability, Low weld crack susceptibility, etc.

The thickening of the steel plate increases the difficulty of welding and increases the heat-affected zone of welding, which increases the risk of brittleness when the residual stress cannot be eliminated by heat treatment

Limited by steel plate type, quality, thickness, and process, the cost of large storage tanks is getting higher and higher

(2) Large-scale storage tanks have higher requirements on the foundation, and serious damage is likely to occur when the foundation subsides

(3), large area, large safety distance interval, high cost of pipeline network construction, and increased land cost

(4) The tank body is sensitive to climatic conditions, and high temperature, low temperature, and lightning will cause harm to the tank body

(5) Great impact on the environment, easy to pollute, not conducive to environmental protection

(6), poor safety and reliability, vulnerable to fire, lightning, earthquake and destructive attacks

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