A physical dryer for preparing composite airgel self-insulating formwork

Abstract

The invention relates to a physical dryer for preparing a composite aerogel self-thermal-insulation template. The physical dryer comprises a first drying part and a second drying part, wherein the second drying part is configured to be a hollow outer shell to form a containing space capable of containing the composite aerogel self-thermal-insulation template, and the composite aerogel self-thermal-insulation template can be supported; and a negative pressure space in a negative pressure state in which the air pressure is smaller than the standard atmospheric pressure is formed in the first side, which is approximately perpendicular to the ground direction, of the composite aerogel self-thermal-insulation template, gas in the atmospheric environment can enter the containing space based on the negative pressure state, moreover, gas located on the second side, opposite to the first side, of the composite aerogel self-thermal-insulation template can move along the second side in the direction pointing to the first side on the basis of the negative pressure state, so that the gas positioned on the second side can enter the composite aerogel self-thermal-insulation template from the second side and is discharged out of the composite aerogel self-thermal-insulation template from the first side, and the gas penetrating the composite aerogel self-thermal-insulation template can be discharged out of the containing space through the negative pressure space.

Description

technical field [0001] The invention belongs to the technical field of drying equipment, and in particular relates to a physical dryer for preparing composite airgel self-insulating formwork. Background technique [0002] As a new type of high-efficiency thermal insulation material, silica (SiO2) airgel has the characteristics of extremely low density, high porosity, ultra-low thermal conductivity, sound insulation, and flame retardancy. It is used in aerospace, Petrochemical, building energy saving, new energy and other fields have broad application prospects, and are listed as one of the top ten new materials in the 21st century. However, due to its poor mechanical properties, brittleness and high production cost, its application has been limited, and it is difficult to achieve large-scale industrial production. Therefore, airgel needs to be reinforced and composited with other materials such as ceramics and fibers to better meet the actual needs. In recent years, with t...

AI Technical Summary

Problems solved by technology

The preparation methods of airgel insulation panels are generally divided into two categories: one is to mix silica airgel particles or powder with modifiers, surfactants, solvents, etc. to make airgel slurry, and then pass Processing and drying to make airgel heat insulation board, this kind of method has simple process, high production efficiency, easy to realize industrial production, but the product performance is unstable and the heat insulation effect is poor

The second is to combine ceramics, fibers, etc. with silica sol to form a gel, and then make an airgel heat insulation board through aging, modification, drying, etc. The product stability of this type of method is better, but the process requirements are higher

However, when the drying device of the invention is used to dry and heat the heat insulation felt, it cannot turn over the heat insulation felt, so that the drying efficiency is low and the drying effect is poor.

[0004] However, the heat insulation performance of the airgel insulation board prepared by the existing atmospheric pressure drying method is relatively poor, and at the same time, it is prone to powder and slag loss.

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