Method for preparing boiler phase-change thermal-insulation material from illegal cooking oil

Abstract

The invention relates to a method for preparing boiler phase-change thermal insulation materials by using waste oil, which belongs to the preparation method of thermal insulation materials. In this method, waste oil is used as a raw material, and complex fatty acid is obtained through purification, saponification and acidolysis as a phase change body, which is encapsulated in the rich mesh micropores of expanded graphite, and compounded with gypsum powder and glass fiber to prepare a thermal insulation material. The use of waste oil avoids the use of petroleum energy, and the fatty acid produced from waste oil has a high melting temperature, which is suitable for boiler insulation, and is non-toxic, non-corrosive, low in price, and has natural renewable properties, while expanded graphite The encapsulation of mixed fatty acids solves the problems of macroscopic flow and leakage of ordinary phase change materials when the phase changes. It is an environmentally friendly and efficient thermal insulation material with broad application prospects.

Description

technical field [0001] The invention relates to a method for preparing phase-change thermal insulation materials for boilers by using waste oil, and belongs to the field of thermal insulation material preparation. Background technique [0002] It is the focus of building energy conservation research to meet building requirements and effectively reduce energy consumption. Studies have shown that in residential building energy consumption, air conditioning and heating energy consumption account for the largest proportion, reaching 65% of the total energy consumption. It can be seen that it is necessary to develop new energy-saving technologies in the field of building material substrates and building equipment. Adding phase change materials to building materials to make phase change energy storage building materials, using its latent heat energy storage to play the role of building temperature regulation, auxiliary heat storage and heat storage, has become a research hotspot i...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: most of the common phase-change thermal insulation materials are prepared from non-renewable petroleum energy sources, have strong corrosion effects, are prone to supercooling and phase separation, and have low thermal conductivity and high temperature. It is easy to oxidize and decompose, and macroscopic flow and leakage will occur when the phase state changes. A method for preparing phase-change thermal insulation materials for boilers using waste oil is provided. The method uses waste oil as raw material and undergoes purification, saponification and acid The complex fatty acid is prepared as a phase change body, which is encapsulated in the rich mesh micropores of expanded graphite, and compounded with gypsum powder and glass fiber to prepare an insulation material. The use of waste oil avoids the use of petroleum energy, and the waste oil The prepared fatty acid has a high melting temperature, is suitable for boiler insulation, and is non-toxic, non-corrosive, low in price, and has natural renewability, and the encapsulation of the mixed fatty acid by expanded graphite solves the problem of common phase change materials. Macroscopic flow and leakage will occur when the state changes. It is an environmentally friendly and efficient thermal insulation material with broad application prospects.