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A high-temperature-resistant asbestos-free quick-drying thermal insulation spray coating and its application method

An asbestos-free, quick-drying technology, applied in the field of thermal insulation spray coatings, can solve the problems of thick thermal insulation coating, poor high temperature resistance, and high thermal conductivity, and achieve the effects of good thermal insulation performance, widening application scope and low thermal conductivity.

Active Publication Date: 2015-11-18
云南智仁节能环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many types of thermal insulation coatings used in industry at home and abroad, but in the thermal insulation of high-temperature industrial equipment or other special-shaped, rotating and other thermal equipment, the existing thermal insulation coatings are not very ideal in terms of technical performance and use effect , such as: some have high thermal conductivity, poor high temperature resistance, thick insulation coating, many materials, and high cost; some insulation materials are not strong enough, and they are easy to crack after construction; It can not meet the ideal requirements for adapting to the application of industrial equipment, thus affecting the thermal efficiency of the equipment
There are also thermal insulation coatings that are prepared as viscous pastes when they leave the factory, and their water weight accounts for more than 2-3 times the weight of the materials, which not only brings great inconvenience to large-scale, long-distance shipments and factory storage, At the same time, it also increases a large amount of transportation and storage costs.
Moreover, due to the short shelf life of the paste thermal insulation coating, once it is shipped over a long distance, it is easy to cause deterioration or dehydration of the thermal insulation coating, which leads to poor bonding effect of the thermal insulation coating or the disadvantage that the insulation layer cannot be applied
Most of the traditional thermal insulation materials contain asbestos fibers. The inhalation of asbestos fibers in the process of production and construction will cause cancer. The country has explicitly banned the addition of asbestos fibers to thermal insulation materials.

Method used

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  • A high-temperature-resistant asbestos-free quick-drying thermal insulation spray coating and its application method
  • A high-temperature-resistant asbestos-free quick-drying thermal insulation spray coating and its application method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A high-temperature-resistant asbestos-free quick-drying thermal insulation spray coating, which is composed of powder and bonding solution, and the powder includes 30% sepiolite powder, 20% vitrified microspheres, and 20% expansion A mixture of vermiculite powder, 20% perlite micropowder and 10% magnesium oxide powder; the bonding solution includes 3% aluminum dihydrogen phosphate, 20% polyvinyl alcohol and 77% water by weight percentage.

[0028] The particle size of sepiolite in the present embodiment 1 is 120 orders; The vitrified microbead is that particle size is 50 microns, the hollow sphere of wall thickness 1~2 micron; The particle size of expanded vermiculite is 80 orders; The particle size of perlite micropowder is 140 orders; The particle size of magnesium oxide powder is 100 mesh.

Embodiment 2

[0030] A high-temperature-resistant asbestos-free quick-drying thermal insulation spray paint, which is composed of powder and bonding solution. A mixture of vermiculite powder, 25% perlite micropowder and 10% magnesium oxide powder; the binding solution includes 5% aluminum dihydrogen phosphate, 25% polyvinyl alcohol and 70% water by weight percentage.

[0031] The particle size of sepiolite in the present embodiment 1 is 150 orders; The vitrified microbead is that particle size is 90 microns, the hollow sphere of wall thickness 1~2 micron; The particle size of expanded vermiculite is 150 orders; The particle size of perlite micropowder is 160 orders; The particle size of magnesium oxide powder is 100 mesh.

Embodiment 3

[0033]A high-temperature-resistant asbestos-free quick-drying thermal insulation spray coating is composed of powder and bonding solution. The powder includes 35% sepiolite powder, 25% vitrified microspheres, and 20% expansion A mixture of vermiculite powder, 15% perlite micropowder and 5% magnesium oxide powder; the binding solution includes 3% aluminum dihydrogen phosphate, 30% polyvinyl alcohol and 67% water by weight percentage.

[0034] The particle size of sepiolite in the present embodiment 1 is 100 orders; The vitrified microsphere is a hollow sphere with a particle size of 30 microns and a wall thickness of 1 to 2 microns; the particle size of expanded vermiculite is 50 orders; the particle size of perlite micropowder is 120 orders; The particle size of magnesium oxide powder is 100 mesh.

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Abstract

The invention provides a high-temperature-resistant asbestos-free fast-drying thermal-insulation spray coating and application method thereof. The thermal-insulation spray coating consists of powder and a binder solution, wherein the powder is a mixture of sepiolite powder, vitrified microbeads, expanded vermiculite powder, pearlite micropowder and magnesium powder; the binder solution comprises aluminum dihydrogen phosphate, polyvinyl alcohol and water. When the spray coating is applied, the binder solution is mixed with the powder at a weight ratio of (2-5):1 uniformly to obtain slurry and then the slurry is sprayed. The thermal-insulation spray coating has stronger thermal insulation and cold insulation effects, and good thermal insulation properties and low thermal conductivity; equipment needs not to be subjected to anticorrosion treatment before construction, which is convenient to construction; since the thickness of the sprayed insulation layer is economic and reasonable and only 1 / 6-1 / 3 of the thickness of traditional insulation materials, the extra load of equipment is reduced and the flaw detection and maintenance of equipment are convenient; the coating can also be recycled. The spray coating can be widely used in thermal insulation of various thermodynamic devices and cryogenic facilities in chemical industry, electrical construction, furnace, petroleum and other departments.

Description

technical field [0001] The invention relates to the technical field of thermal insulation spray paint, in particular to a high-temperature-resistant asbestos-free quick-dry thermal insulation spray paint. Background technique [0002] At present, there are many types of thermal insulation coatings used in industry at home and abroad, but in the thermal insulation of high-temperature industrial equipment or other special-shaped, rotating and other thermal equipment, the existing thermal insulation coatings are not very ideal in terms of technical performance and use effect , such as: some have high thermal conductivity, poor high temperature resistance, thick insulation coating, many materials, and high cost; some insulation materials are not strong enough, and they are easy to crack after construction; It is not ideal to adapt to the application requirements of industrial equipment, thus affecting the thermal efficiency of the equipment. There are also thermal insulation co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34
Inventor 黎于栋
Owner 云南智仁节能环保工程有限公司