A kind of anti-corrosion nano insulation felt and its preparation method and application

Abstract

The invention provides a corrosion-resistant nano-insulation blanket and its preparation method and application. The nano-insulation blanket includes inorganic nano-materials, rare earth oxides, hydrophobic materials and fiber blanket substrates; the inorganic nano-materials are selected from nano-titanium oxide, nano-oxidized One or more of zirconium, nano-zirconium silicate, potassium hexatitanate whisker, ultra-fine alumina powder, ultra-fine aluminum hydroxide powder, carbon black, silicon carbide and silicon nitride; inorganic nano-materials account for nano-thermal insulation 25-40% of the felt mass; rare earth oxides are selected from europium oxide, gadolinium oxide, dysprosium oxide, ytterbium oxide, yttrium oxide, neodymium oxide, terbium oxide, cerium oxide, lanthanum oxide, samarium oxide, erbium oxide, praseodymium oxide, One or more of holmium, lutetium oxide, scandium oxide and thulium oxide. The present invention adopts a specific content of a specific type of inorganic nano-material and is doped with rare earth oxides, so that the nano-insulation blanket has better corrosion resistance, and can be widely used in the temperature-resistant and anti-corrosion requirements of sensitive components such as centrifugal pumps and solenoid valves.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation blankets, in particular to a corrosion-resistant nano thermal insulation blanket and its preparation method and application. Background technique [0002] Ordinary nano-insulation blankets generally use glass fibers or ceramic fibers as the base material, and then compound them with silica materials, including precipitated silica, fumed silica, micro-silica, etc., the insulation effect is acceptable, but the resistance Poor corrosion performance, especially for strong acid, strong alkali and high salinity environment, it is easy to cause the felt body to be eroded and peeled off, which will seriously damage the felt body and cause great damage to the protected equipment and pipelines; in addition, ordinary nano-insulation Felt is mainly used for thermal insulation of large-scale industrial equipment and pipelines, but the thermal insulation or anti-corrosion effect of sensitive small pa...

AI Technical Summary

Problems solved by technology

[0002] Ordinary nano-insulation blankets generally use glass fibers or ceramic fibers as the base material, and then compound them with silica materials, including precipitated silica, fumed silica, micro-silica, etc., the insulation effect is acceptable, but the resistance Poor corrosion performance, especially for strong acid, strong alkali and high salinity environment, it is easy to cause the felt body to be eroded and peeled off, which will seriously damage the felt body and cause great damage to the protected equipment and pipelines; in addition, ordinary nano-insulation Felt is mainly used for thermal insulation of large-scale industrial equipment and pipelines, but the thermal insulation or anti-corrosion effect of sensitive small parts such as centrifugal pumps, solenoid valves, etc. is not significant

[0003] With the continuous development of my country's economy and rapid technological progress, petrochemical, electric power, metallurgy, transportation, non-ferrous building materials and other industries have put forward higher requirements for the use of thermal insulation materials. The application standard has been improved. For example, in the process of producing polysilicon by the improved Siemens method, silicon powder and high-purity hydrogen chloride undergo high-temperature reactions in the synthesis furnace, which requires that the insulation materials for wrapping equipment and pipelines have excellent acid corrosion resistance; etching wafer processing The process requires the use of high-purity hydrogen fluoride, and the corrosion resistance requirements for equipment and pipelines are also quite high. Therefore, it is difficult to meet the production process requirements for nano-insulation blankets prepared solely with silica powder as a filling material.

[0004] The existing silica nano-insulation blanket is mainly used in the field of refractory heat preservation, and its ability to resist the corrosion and damage of the surrounding medium is relatively weak. , High salinity environment, such as chlor-alkali chemical equipment, polysilicon industry, wafer and chip processing industry, marine ships, transportation equipment and other fields are severely restricted