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LNG receiving structure

一种构造、导管的技术，应用在LNG接纳构造领域，能够解决储罐损坏等问题，达到抑制发生风险的效果

Inactive Publication Date: 2015-07-22
IHI PLANT SERVICES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When BOG exceeding the processing capacity of the BOG compressor is generated due to the overturning, it is necessary to operate the safety valve to discharge the excess BOG to the outside of the storage tank, but if it occurs, the excess BOG is discharged beyond the safety valve. capability of the BOG, it may cause damage to the tank

Method used

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  • LNG receiving structure
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0030] Figure 1A It is a perspective view of the LNG receiving structure LS of the first embodiment, Figure 1B Is the LNG receiving structure LS Figure 1A A-A in the cross-sectional view.

[0031] In these figures, reference numeral 1 is a conduit provided below a receiving pipe 102 penetrating the ceiling of the LNG storage tank and extending to the bottom of the LNG storage tank. Reference numeral 2 is a guide member (V-shaped plate) provided in the conduit 1 and responsible for reducing the initial velocity of LNG discharged from the receiving pipe 102 and guiding the LNG to the inner wall of the conduit 1 . Reference numeral 3 is a gas discharge port provided on the duct 1 to discharge gas rising from below the duct 1 to the outside. Reference numeral 4 denotes an exhaust pipe that communicates with the gas discharge port 3 and extends upward.

[0032] The cross-sectional area of ​​the conduit 1 is set larger than the cross-sectional area of ​​the receiving pipe 102 ....

no. 2 Embodiment approach 〕

[0047] Next, a second embodiment of the present invention will be described. Figure 3A It is a side view showing the overall image of the LNG storage structure LS' of the second embodiment, Figure 3B yes Figure 3A The BB-B arrow cross-sectional view. also, Figure 3C yes Figure 3B The CC-C cross-sectional view.

[0048] exist Figure 3A Among them, reference numeral 201 is the bottom plate of the LNG storage tank, reference numeral 202 is a cylindrical side wall vertically provided on the upper surface of the bottom plate 201, and reference numeral 203 is a method for blocking the upper opening. Set the dome-shaped ceiling.

[0049] Such as Figure 3A and Figure 3B As shown, there are cases where pump barrels 211 , 212 , and 213 are provided inside the LNG storage tank, penetrating the ceiling 203 along the side wall 202 and extending to the bottom of the LNG storage tank (that is, the bottom plate 201 ). Specifically, the pump barrels 211 and 212 of the pump bar...

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Abstract

The LNG receiving structure according to the present invention adopts the following structure: a duct (1) is provided below the receiving pipe (102) that penetrates the ceiling of the LNG storage tank and extends to the bottom of the LNG storage tank. At the bottom, the cross-sectional area of ​​the above-mentioned conduit is set to be larger than the cross-sectional area of ​​the above-mentioned receiving pipe. According to this LNG receiving structure, when storing a plurality of types of LNG having different densities in the same LNG tank, it is possible to minimize the risk of overturning. In addition, it is possible to suppress the entrainment of gas at the time of receiving LNG into the LNG storage tank.

Description

technical field [0001] The present invention relates to an LNG (Liquefied Natural Gas) receiving structure. [0002] This application claims priority based on Japanese Patent Application No. 2011-82770 for which it applied in Japan on April 4, 2011, and uses the content here. Background technique [0003] The composition, density (weight), physical properties, etc. of LNG vary depending on the origin and disposal. In recent years, as the demand for LNG has increased, the development of technologies for mixing and storing different types of LNG has been promoted due to the need to accommodate multiple types of LNG with different densities in the same LNG storage tank. This mixed storage technology of different types of LNG has great economical advantages such as facilitating LNG trading and distribution and reducing equipment costs. Countermeasures against overturning. [0004] Stratification refers to the fact that when multiple types of LNG with different densities are i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C13/00F17C6/00
CPCF17C13/004F17C2221/033F17C2223/0161F17C2223/033F17C2223/041F17C2223/047F17C2225/041F17C2225/047F17C2260/042F17C2270/0136F17C3/00
Inventor 小岛琢山口方士
Owner IHI PLANT SERVICES CORP