LNG is short for liquefied natural gas. Why does LNG need insulation? This brings us to the formation process of liquefied natural gas: liquefied natural gas is a kind of clean energy, which has become one of the popular fuels in the current wind that advocates energy conservation, environmental protection and low-carbon. The gas liquefaction process requires low temperature liquefaction. During the whole liquefaction process, the tank wall of liquefied natural gas needs to be insulated in order to maintain the low temperature state. What materials do we usually use? In the early years, LNG storage tank technology mainly achieved the development of LNG industry chain through the introduction of foreign technologies. With the progress of The Times and the technological progress and development of national enterprises, storage tank technology has been well improved in recent years. The thickness of tank insulation is reflected in some technical data, and even needs to reach one meter. Usually, a variety of insulation materials are used together, such as perlite and elastic felt. There are also tanks that use elastic felt alone as insulation.
In many scientific research or low-temperature construction research and practice, low temperature is often easy to make material properties deteriorate, such as brittle, soft object properties become hard. Even energy sources, such as electricity use, are affected by temperature. At low temperature, the effect of mobile phones and other batteries is lower and more power consumption, because the temperature affects the change of conductive material, resulting in power loss.
Elastic felt, as the name suggests, is a kind of elastic thermal insulation felt body, which can meet the requirements of large area laying, small area filling auxiliary and other applications. The raw material is derived from natural minerals, which are rich in silicon and can be fused at high temperatures to form fibers. Uetersen New Materials, a brand that produces and develops elastic felt, has mentioned that elastic felt can properly hold heat at ultra-low temperatures -- (-162℃) is a prerequisite for LNG.
The insulation layer of LNG provides a prerequisite for the liquefaction of natural gas. When the temperature is lower than -162℃, the liquefaction of natural gas will fail. The insulation layer is crucial, but also to avoid temperature diffusion heating, maintain the tank temperature balance. Relying on the elasticity of elastic felt, it can fill the gap of insulation layer tightly in hot and cold conditions, to avoid the gap caused by the influence of internal and external temperature changes perlite insulation, resulting in temperature loss.