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Heat insulation structure for two-cylinder type LNG low temperature storage tank

A low-temperature storage tank and heat-insulating structure technology, applied in fixed-capacity gas storage tanks, gas/liquid distribution and storage, pressure vessels, etc., can solve the problems of increasing the weight of double-barreled LNG low-temperature storage tanks, increasing power transportation costs, etc. Achieve the effect of reducing the cost of power transportation, improving the effect of heat insulation, and excellent heat insulation performance

Inactive Publication Date: 2018-12-04
XINXING ENERGY EQUIP
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

This structure increases the weight of the double-tube LNG cryogenic storage tank and increases the cost of power transportation

Method used

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  • Heat insulation structure for two-cylinder type LNG low temperature storage tank

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Embodiment Construction

[0014] figure 1 Schematic diagram of the structure of the present invention, paste 12-13 layers of heat-insulating paper 4 on the inner wall of the outer tank 1 and the outer wall of the inner tank 2, and then stick the heat-insulating paper 4 with the lens 5 on the heat-insulating paper layer, the interlayer between the inner and outer tanks 3 Vacuum, vacuum degree ≤ 0.001Pa. In order to avoid the impact of impurities in the production process on the thermal insulation performance, an AG molecular sieve low-temperature adsorption device is installed in the interlayer 3 of the inner and outer tanks.

[0015] Before the assembly, the lens 5 is pasted on the heat-insulating paper 4 in advance, and then pasted on the heat-insulating paper layer on the inner wall of the outer tank 1 and the outer wall of the inner tank 2. In order to ensure a good fit, the lens 5 is matched with the arc of the sticking surface curved lenses or small size flat lenses.

[0016] When welding the he...

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Abstract

The invention provides a heat insulation structure for a two-cylinder type LNG low temperature storage tank. Heat-insulation paper (4), which is adhered with a mirror slip (5), is attached to the inner wall of an outer tank (1) and the outer wall of an inner tank (2); an interlayer (3) between the inner and outer tanks is vacuumized, and the vacuum degree is less than or equal to 0. 001 Pa; and anAG molecular sieve low temperature adsorption device is disposed in the interlayer (3). The heat insulation structure enables conduction, convection and radiation heat transfer to be eliminated, is excellent in thermal insulation performance, adopts a hollow structure, and enables the weight of the storage tank to be reduced.

Description

technical field [0001] The invention is applied in the field of natural gas storage, and in particular relates to a thermal insulation structure of a double-barreled LNG cryogenic storage tank. Background technique [0002] As a clean energy, natural gas has been paid more and more attention by the society, and it has gradually penetrated from the industrial field to the living field. Generally speaking, gaseous natural gas CNG is mostly transported by pipeline, which is directly transported to the place of use. Liquefied natural gas LNG mostly adopts storage tanks, and LNG is generally stored in LNG storage tanks at a pressure of 0.1-0.2 MPa and at -163 °C. In order to insulate the storage tank, most LNG storage tanks adopt a double-barreled structure. The outer tank is mostly made of low alloy steel, and the inner tank is mostly made of stainless steel. Heat insulating materials are added between the two tanks, and then vacuumized to improve heat insulation. performance....

Claims

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Application Information

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IPC IPC(8): F17C1/12
Inventor 杨利芬李振合武常生崔闻天
Owner XINXING ENERGY EQUIP
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