Equipment and method for rapidly preparing gel felt

Abstract

The invention provides equipment and method for quickly preparing a gel felt. The equipment for quickly preparing the gel felt comprises an outer cylinder, an inner cylinder rotationally arranged in the outer cylinder and provided with an inner cavity for an unfolded fiber felt to penetrate through the inner cylinder, and a driving device which is in transmission connection with the inner cylinder and used for driving the inner cylinder to rotate; the inner cylinder and the outer cylinder are arranged in a spaced mode to form an annular cavity; the two axial ends of the annular cavity are closed; an inlet allowing silica sol, a catalyst or catalytic sol to enter the annular cavity is formed in the outer cylinder; a plurality of communicating holes for communication between the inner cavity of the inner cylinder and the annular cavity are formed in the inner cylinder; and when the inner cylinder rotates, the silica sol, the catalyst or the catalytic sol entering the annular cavity enters the inner cavity of the inner cylinder through the communicating holes and is sprayed to the surfaces of the two sides of the fiber felt under the rotation action of the inner cylinder. The all-directional spraying effect can be achieved, so that it is guaranteed that the silica sol, the catalyst or the catalytic sol is fully and evenly immersed into the fiber felt, and the good heat preservation and heat insulation performance of the gel felt is guaranteed.

Description

technical field [0001] The invention relates to the technical field of gel felt manufacturing, in particular to a device and method for rapidly preparing gel felt. Background technique [0002] Airgel is called a super thermal insulation material. It is generally combined with inorganic fibers to make airgel thermal insulation blankets, thermal insulation boards or other special-shaped parts, etc., to give full play to the excellent thermal insulation properties of airgel materials. The preparation method is based on fiber mats such as glass fiber or ceramic fiber, and the prepared sol is combined with the fiber mat by dipping or spraying, and the sol is sol-gel polymerized in the substrate to form a gel mat. Then the gel felt body is chemically modified, and finally the airgel felt is obtained through a supercritical or normal pressure drying process. [0003] The Chinese invention patent application with the application publication number CN107531496A discloses a manufact...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of equipment for rapidly preparing gel felt, to solve the problem of insufficient and uneven impregnation of silica sol, catalyst or catalytic sol in the fiber mat in the pr

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