In pipeline thermal insulation engineering, according to design specifications and cost budgets, there are more pipe insulation cottons to choose from. Traditional insulation materials include centrifugal glass wool, rock wool, aluminum silicate, expanded perlite, etc. For the thermal insulation of pipes, the aerogel felt, which has a lot of functional advantages and high cost performance, has great economic significance.
Good insulation effect. As we all know, the thermal insulation effect of the thermal insulation material depends on the thermal conductivity of the product. The performance of the aerogel's thermal conductivity is very good whether it is at room temperature or high temperature. In the rising temperature ladder, the thermal conductivity of aerogels has been increasing slowly, while other thermal insulation materials have shown a steep slope increase. This shows that as the temperature continues to increase, the thermal conductivity of the aerogel increases less and the thermal insulation efficiency is relatively stable, while other thermal insulation materials decrease linearly as the temperature increases.
Hydrophobic. The application environment of pipeline insulation is complex, including indoor insulation, outdoor insulation, and direct buried pipeline insulation. Compared to indoor and outdoor pipeline insulation, the use of aerogel felt as insulation material in direct buried pipeline insulation highlights the advantages of aerogel. First of all, the aerogel's hydrophobicity can make the pipe's insulation layer waterproof, which can prevent the decrease of the insulation efficiency caused by the damp insulation layer (high moisture content will reduce the insulation effect of the insulation layer). In addition, hydrophobicity also plays an important role in preventing condensation due to temperature differences. Secondly, the aerogel's porosity allows water to drain out in the form of water vapor, keeping the insulation layer dry. As for the anticorrosion and fire resistance of traditional inorganic fibers, aerogels are fully equipped.
Make the insulation space smaller. Because the aerogel has a good thermal conductivity, when the same thermal insulation effect is achieved, the thickness or space of the aerogel thermal insulation layer is smaller. For the buried pipeline insulation project, using aerogel to achieve the same insulation effect can reduce the thickness of the insulation layer, which means that the amount of earthwork is reduced and the construction period is shortened. The two reduced costs can completely offset the use of aerogel as the The cost of insulation materials replacing traditional insulation materials.
Convenient construction and improved construction efficiency. After cutting the aerogel felt into a certain size, it will naturally roll up a certain degree of curvature. For the heat preservation of the pipeline, the aerogel felt can be directly placed on the pipeline and installed and fixed. In addition, the aerogel felt is lightweight, has a certain degree of hardness and flexibility, is not easy to break, and is very easy to cut. Compared with the construction of traditional thermal insulation materials, it can improve the construction efficiency by more than 30%, while avoiding the inconvenience of the maintenance of traditional thermal insulation materials. Worries.
Through the above comparison, the aerogel felt has obvious advantages and economic significance compared with traditional insulation materials in the application of pipeline insulation engineering.