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An ultra-low temperature composite insulation material suitable for liquid gas storage and transportation equipment

A technology for composite thermal insulation materials and transportation equipment, which is applied in the field of thermal insulation materials for ultra-low temperature equipment, can solve problems such as undiscovered application research reports, and achieve the effects of good thermal insulation performance, stable properties and low outgassing rate

Active Publication Date: 2017-12-29
山东德艾普节能材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing research on the application of zirconia fibers is concentrated in the field of high temperature / ultra-high temperature insulation, and no research report on the application of the main heat insulation material in the field of ultra-low temperature has been found after searching.

Method used

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  • An ultra-low temperature composite insulation material suitable for liquid gas storage and transportation equipment
  • An ultra-low temperature composite insulation material suitable for liquid gas storage and transportation equipment
  • An ultra-low temperature composite insulation material suitable for liquid gas storage and transportation equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The monoclinic zirconia fiber cotton is prepared into a felt, the diameter of the zirconia fiber is 0.3-1 μm, the thickness of the felt is 5-6 mm, and the width of the felt is 3000 mm; the zirconia fiber felt and the aluminum foil with a thickness of 6-7 μm are laminated layer by layer. to a total thickness of about 20mm.

[0033] Wrap the compounded material on the inner tank body of the liquid gas storage tank, fix it and put it into the outer tank, and then vacuumize it to 10 -4 Pa, the product can effectively maintain a high vacuum for a long time, and has good low temperature heat insulation and flame retardancy.

[0034] In gas cylinders filled with liquid nitrogen in the liner, the thermal insulation effect of zirconia fiber is 10%-20% higher than that of glass fiber paper. Compared with glass fiber paper, the vacuum outgassing rate is greatly reduced.

Embodiment 2

[0036] As described in Example 1, when the inner tank is loaded with 500L of liquefied natural gas, the thermal insulation effect of the zirconia fiber is 10%-20% higher than that of the glass fiber paper. Compared with glass fiber paper, the vacuum ventilation rate and static evaporation rate are greatly reduced.

Embodiment 3

[0038] (1) Monoclinic zirconia fiber cotton is prepared into a mat, the fiber diameter is 3-4 μm, the thickness of the felt is 4-5 mm, and the width of the felt is 1000 mm; the fiber mat and the aluminum foil with a thickness of 7-8 μm are laminated layer by layer. to a total thickness of about 20mm.

[0039] (2) Wrap the compounded material on the inner tank cylinder, fix it into the outer tank, and vacuumize it to 10 after airtight - 3 Pa, can effectively maintain a high vacuum degree for a long time, and has good low temperature heat insulation and flame retardancy. The inner tank is loaded with liquefied natural gas, and the thermal insulation effect of zirconia fiber composite material is 20% higher than that of glass fiber paper.

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Abstract

The invention relates to an ultralow temperature composite heat insulation material suitable for a liquid gas storage and transportation apparatus. A composite sheet is prepared through multilayer compounding of zirconia fibrofelts or paper and an isolation reflecting layer, and is wrapped on the liquid gas storage and transportation apparatus. The ultralow temperature composite heat insulation material can meet storage and transportation safety requirements of liquefied natural gas, liquid hydrogen, liquid oxygen and other inflammable and combustion-supporting media.

Description

technical field [0001] The invention relates to an ultra-low temperature composite thermal insulation material suitable for liquid gas storage and transportation equipment, and belongs to the technical field of ultra-low temperature equipment thermal insulation materials. Background technique [0002] The boiling point of cryogenic liquid gas is very low, such as -196°C for liquid nitrogen, -183°C for liquid oxygen, -253°C for liquid hydrogen, -268.9°C for helium, and -162°C for liquefied natural gas. Natural gas production accounts for up to 1 / 3 of the world's total energy production. It is estimated that by 2020 the proportion of natural gas in the world's total energy demand will reach 45%-50%. Sales of liquefied natural gas (LNG) accounted for about 33%. With the increasing demand for cryogenic liquids, cryogenic containers such as LNG cryogenic gas cylinders, storage tanks, and cryogenic pipelines have become more and more widely used, accompanied by higher and higher...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/20B32B15/12B32B15/14F17C13/00
CPCY02E60/32
Inventor 许东张光辉朱陆益刘雪松王新强许志扬
Owner 山东德艾普节能材料有限公司
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