Functionally gradient glass cotton felt for high-temperature pipelines

Abstract

The invention discloses functionally gradient glass cotton felt for high-temperature pipelines. The functionally gradient glass cotton felt is characterized in that the functionally gradient glass cotton felt comprises a superfine ceramic fiber paper layer, a superfine glass fiber paper layer and hydrophobic flame-resistant glass fiber cotton felt, wherein zirconium silicate and silicon carbide hollow ceramic powder are arranged between every two pieces of paper of the superfine ceramic fiber paper layer in a filling manner from inside to outside, and a 1-3 mu m thick stainless steel film is arranged every 1 mm; aerogel is arranged between every two pieces of paper of the superfine glass fiber paper layer in a filling manner, the volume content is 15%-25%, and a 2-4 mu m thick aluminum foil is arranged every 5 mm; according to the hydrophobic flame-resistant glass fiber cotton felt, the weight content of organic matters in the cotton felt is 10%-20%, and the drainage rate is 20 g. The functionally gradient glass cotton felt can be used for a long time at the temperature about 500 DEG C, the temperature of the junction of the ceramic fiber paper layer and the glass fiber paper layer doesn't exceed 400 DEG C, the temperature of the junction of the glass fiber paper layer and the glass cotton fiber felt doesn't exceed 150 DEG C, the overall heat conductivity coefficient is about 0.045 W / m*K, the overall thickness of the material is greatly reduced, mounting and dismounting are facilitated, meanwhile, the construction period is shortened, and the economic benefits are improved.

Description

technical field [0001] The patent of the present invention relates to a gradient functional glass wool felt, in particular to a gradient functional glass wool felt for high-temperature pipelines. technical background [0002] With the development of the nuclear power industry, people pay more and more attention to nuclear energy, an efficient and clean energy. The country also has a clear plan for the use of nuclear energy. The rational use of nuclear energy under the premise of ensuring safety can effectively alleviate the increasingly tense energy crisis. In the fast reactor, in order to isolate the radioactive core from the power generation part, the sodium cooling system is divided into a primary loop and a secondary loop. The primary loop is directly in contact with the core, and the heat is transferred to the secondary loop through a heat exchanger. The sodium flow in the secondary circuit heats the boiler to generate steam at about 483°C, which is used to drive the st...

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Problems solved by technology

The disadvantage is that the hard nano-insulation composite material layer is easy to be damaged during installation and disassembly, which will cause the failure of the insulation layer and affect the overall insulation performance of the material.

[0006] As in the above two patents, in terms of pipeline insulation, especially for high-temperature pipeline heat transfer, a single insulation material generally has problems such as high thermal conductivity and too thick thickness, and the overall insulation layer module has insufficient maximum temperature resistance. The complex process and other problems cannot meet the current application status, so a new type of thermal insulation structure is urgently needed to solve the existing problems

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