CS237674B1 - Material especially for insulation of heating installations - Google Patents

Abstract

The material consists of one layer of fire-proof fabrics, which on one side has a protective layer, containing in mass percent: from 1.0 to 5.0 silicon fluorosilicate, from 30.0 to 60.0 water glass and the remainder being vitreous sand or a expanded sediment.

Description

The invention relates to a material, in particular for the insulation of thermal devices. It can be used especially in the construction industry in the construction of furnaces, chimneys or heat exchangers, hot air conveyors, etc.

Until now, building materials, steel materials and fibrous inorganic materials are used to insulate thermal equipment. The disadvantage of refractory building materials is their high weight and high energy intensity of their production. The disadvantage of steel materials is that they are made of expensive alloying elements. The disadvantage of fibrous inorganic materials is their high purchase price and considerable application costs, especially with regard to temperature and the environment of their use.

These disadvantages are avoided by the material, in particular for the insulation of the heating devices according to the invention. It consists in that it consists of at least one layer of heat-resistant fabric which is provided with a protective layer. This protective layer consists of 1.0 to 5% by weight. sodium fluorosilicate, 30 to 60 wt.%, water glass, 0 to wt.%, fine sand, and the remainder being at least one of the expanded drift, glass sand. It is advantageous, in particular in terms of cost and mass, if the temperature-resistant fabric is formed by an asbestos fabric. The strength of the material according to the invention is increased when the temperature-resistant fabric is provided with a reinforcing armature on the surface, for example by gluing, a layer of fibrous material, for example inorganic, aluminum foil and protective coatings.

The advantage of the material according to the invention is its low production cost and low weight when used at temperatures up to 900 ° C in acidic environments. Another advantage is that it allows the development of prefabrication q can be produced by cold routes.

-2. 237 674

The invention will now be described in more detail by means of a chimney liner of circular cross-section.

Example 1

This chimney liner is made of 10 1 m and 1 m long panels with a wall thickness of 8 mm. Each panel consists of an asbestos fabric on which it is applied on both sides. protective layer. This protective layer consists of 1.5 wt% sodium fluorokiemite, 40 wt% waterglass and the remainder is an expanded drift. Prior to hardening, the asbestos fabric, provided with a protective layer on both sides, was shaped into a circular cross-section. A neck was formed at one end portion of each panel. Through this neck, the panel is glued to the end portion without the neck of the previous panel. An aluminum foil was glued to the inside of the insert. The outer layer of the chimney body itself was made of reinforced concrete blocks. .

The chimney insert both in the dry state during limited ^row of the ATA. for ^t e ^p lo ^t 4 at ⁰⁰ ° C and plated on ^yhřát te ^pl ol 500 ° C, ^p odrobena tensile test and bending test. When a tensile test was found at the maximum stress vysušeného'stavu 4.3 lR and UV ^l of ^clippers on ^ATE Heated ^t e ^pl of 40 ^t at ⁰ ° C for ^2, 4 ^Mp AAU inserted ^clippers heated to heat the ^5-0 1 ° ^C, and 94 ^{Mp. P} s test on ^HY was by UV bem ^y * dry state detected maximum bending moment of 7.5 Nm and a maximum voltage of 7.03 MPa, the insert 4 heated to a temperature of ⁰⁰ ° C maximum ^and the m ^{^} a ^Hyb AC Momen ^t 5 * 625 ^ Νη maximum three ^{PE 5} 7 ^{2 MP} aauv ^l of ^clippers Heated ^ATE on ^{t h} e ^p lot 5 ⁰ 0 maxinrálrá bending moment of 5625 Nm, the maximum voltage of 5.27 MPa ·

Example 2

Chimney liner was made as in Example 1 · Protective layer consisting of 3% by weight, sodium fluorosilicate, 50% by weight, water glass, 18% fine sand

237,674 and the remainder is glass sand, but was applied to the inorganic fiber fabric.

The insert was subjected to the same tests as in Example liner, first insert in a dried state showed a maximum tensile stress of 4 »2 LT and the maximum bending stress ⁷ 01 LiPA. Vložlca ^yhřátá at a temperature of 400 ° C showed peaks ^l the tension 2,3 LPA and the maximum bending stress amounted to 5.22 LZ? AAU inserted in ^{yhřáté clippers} on ^{t h} e ^p lo ^t at 5 ° C ^{or 0} ° ni ^l maximum tensile stress 1.93 UPa and maximum bending stress 5.22 Lh? a.

Example 3

The chimney liner was formed as in example ц, 1. However, a protective layer of the same composition was applied to an asbestos fabric reinforced with a metal mesh.

^{The insert} in YS ⁱⁿ .i2n ^s m from dropping state of maximum tensile stress of 6.9 MPa and a maximum bending stress of 7.1 M? A ·

Claims (4)

1. The material, in particular for thermal insulation equipment vy-, ^considerable UJ ^I C ^s in that you ^{ta and} at least one VRS in ^{yt t} e ^p lo ^thee ODD VaJ ^{la s i p i} n ^y kan. ^to TERA and ^{l p} o es ^least one side with a protective layer consisting of 1.0 to 5 »0 wt%, sodium fluorosilicate, 30-60% water HMO ^ ^{h to} the axis La., and zb as ^yt e ^{kt of manufacture} ales ^p o.ň one of the substances expanditový drift, glass sand. 2. The material of claim 1, wherein the protective layer further comprises a maximum of 25% by weight fine sand. 3. Material referred to in points 4 characterized in that the heat resistant fabric is formed by an asbestos fabric. The material according to claims 1 to 3, characterized in that the temperature-resistant fabric is provided with a reinforcing armature, for example a metal armature.