A medium temperature box furnace insulation layer structure

Abstract

The utility model discloses a medium-temperature box-type furnace insulation layer structure, including a ceramic fiber blanket, the ceramic fiber blanket including a ceramic fiber blanket 1 and a ceramic fiber blanket 2, a cavity between the two groups of ceramic fiber blankets, the outer surface of the ceramic fiber blanket 1 is bonded with a metal mesh 1, an impact-resistant layer and a fireproof layer in sequence through a high-temperature resistant adhesive, the outer surface of the ceramic fiber blanket 2 is bonded with a metal mesh 2 through a high-temperature resistant adhesive, and the outer surface of the metal mesh 2 is sprayed with a high-temperature resistant coating layer. In the utility model, by providing the metal mesh layer 1 and the metal mesh layer 2, the strength of the insulation layer can be effectively enhanced, and by arranging a microporous calcium silicate board that plays a supporting role in the cavity between the two groups of ceramic fiber blankets, the strength of the insulation layer is improved, thereby improving the pressure and tensile properties of the insulation layer.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation materials, in particular to a thermal insulation layer structure of a medium-temperature box-type furnace. Background Art

[0002] The box-type furnace is a heating furnace with a box-shaped furnace chamber. The products are fixed during the whole heating process of heating, heat preservation and cooling. The feeding and discharging are carried out through a single door or slot. The box-type furnace is composed of a furnace frame, a furnace shell, a furnace lining, a furnace door device, electric heating elements and auxiliary devices. Among them, the function of the box-type furnace lining is to protect the furnace temperature and reduce heat loss. The lining is composed of refractory materials and thermal insulation materials. The lining is close to the electric heating element and the thermal insulation material is close to the shell.

[0003] At present, the lining of medium temperature box furnace is made of light refractory and heat-insulating materials such as high-aluminum or aluminum silicate refractory fibers, and the fiber blanket material is generally used in the layer close to the furnace shell. However, the pressure and tensile properties of fiberboard / blanket are poor, and the surface of fiberboard / blanket is easily deformed under pressure or impact. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems mentioned in the above background technology and to propose a medium-temperature box-type furnace insulation layer structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A medium-temperature box-type furnace insulation layer structure includes a ceramic fiber blanket, wherein the ceramic fiber blanket includes ceramic fiber blanket 1 and ceramic fiber blanket 2, a cavity is provided between the two groups of ceramic fiber blankets, the outer surface of the ceramic fiber blanket 1 is bonded with a metal mesh 1, an impact-resistant layer and a fireproof layer in sequence through a high-temperature resistant adhesive, the outer surface of the ceramic fiber blanket 2 is bonded with a metal mesh 2 through a high-temperature resistant adhesive, and the outer surface of the metal mesh 2 is sprayed with a high-temperature resistant coating layer.

[0007] As a further description of the above technical solution:

[0008] It also includes microporous calcium silicate rods, and multiple groups of microporous calcium silicate rods are arranged in the cavity in a linear array.

[0009] As a further description of the above technical solution:

[0010] It also includes aluminum foil, and the inner surfaces of the ceramic fiber blanket 1 and the ceramic fiber blanket 2 are both bonded with aluminum foil.

[0011] As a further description of the above technical solution:

[0012] The first ceramic fiber blanket is an alumina ceramic fiber blanket, and the second ceramic fiber blanket is a zirconium-containing ceramic fiber blanket.

[0013] As a further description of the above technical solution:

[0014] The impact-resistant layer comprises a thin carbon fiber layer and a thick carbon fiber layer. Both groups of carbon fiber layers are woven in unidirectional twill with different twill directions. The two groups of carbon fiber layers are bonded together by a carbon fiber adhesive under high pressure.

[0015] As a further description of the above technical solution:

[0016] The thickness of the thick carbon fiber layer is 2 to 2.5 times that of the thin carbon fiber layer.

[0017] As a further description of the above technical solution:

[0018] The fireproof layer is silicon crystal fiber fireproof cotton or ceramic cotton.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. In the utility model, by providing the first metal mesh layer and the second metal mesh layer, the strength of the thermal insulation layer can be effectively enhanced, and by arranging a microporous calcium silicate board for support in the cavity between the two groups of ceramic fiber blankets, the strength of the thermal insulation layer is improved, thereby improving the compressive and tensile properties of the thermal insulation layer.

[0021] 2. In the utility model, the cavity further blocks heat conduction, the aluminum foil has a high reflectivity, and further blocks heat radiation. The thermal insulation material layers are arranged in sequence outward from the ceramic fiber blanket as the center, and the thermal insulation effect is better, which can block both heat conduction and heat radiation.

[0022] 3. In the present invention, the impact resistance can be improved by providing an impact resistance layer of the carbon fiber composite layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An internal schematic diagram of a medium-temperature box-type furnace insulation layer structure provided according to an embodiment of the utility model is shown;

[0024] Figure 2 Shows Figure 1 The enlarged schematic diagram of point A in the middle;

[0025] Figure 3 Shows Figure 1 A magnified schematic diagram of point B in the middle.

[0026] Legend:

[0027] 1. High temperature resistant coating layer; 2. Metal mesh 2; 3. Ceramic fiber blanket 2; 4. Microporous calcium silicate rod; 5. Cavity; 6. Aluminum foil; 7. Ceramic fiber blanket 1; 8. Metal mesh 1; 9. Impact resistant layer; 91. Thin carbon fiber layer; 92. Thick carbon fiber layer; 10. Fireproof layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-3 The utility model provides a technical solution: a medium-temperature box-type furnace insulation layer structure, including a ceramic fiber blanket, the ceramic fiber blanket includes a ceramic fiber blanket 17 and a ceramic fiber blanket 23, a cavity 5 is provided between the two groups of ceramic fiber blankets, the outer surface of the ceramic fiber blanket 17 is bonded with a metal mesh 18, an impact-resistant layer 9 and a fireproof layer 10 in sequence through an XZ-T002 high-temperature resistant adhesive, the outer surface of the ceramic fiber blanket 23 is bonded with a metal mesh 22 through an XZ-T002 high-temperature resistant adhesive, and the outer surface of the metal mesh 22 is sprayed with a high-temperature resistant coating layer 1. By setting the metal mesh layer 16 and the metal mesh layer 22, the strength of the insulation layer can be effectively enhanced, and the pressure and tensile properties of the insulation layer can be improved; by setting the impact-resistant layer 9 of the carbon fiber composite layer, the impact resistance can be improved; the setting of the fireproof layer 10 can improve the fireproof performance of the insulation layer, and the safety is higher; the cavity 5 further blocks heat conduction. With the ceramic fiber blanket as the center, the insulation material layers are sequentially arranged outward, and the insulation effect is better, which can block both heat conduction and heat radiation.

[0030] Among them, ceramic fiber blanket 7 is alumina ceramic fiber blanket, and ceramic fiber blanket 23 is zirconium-containing ceramic fiber blanket. Ceramic fiber blanket 7 uses alumina ceramic fiber blanket with high heat resistance. Alumina ceramic fiber blanket has a high temperature resistance of up to 1600°C, which effectively meets the use requirements of different medium-temperature box furnaces. Ceramic fiber blanket 23 uses zirconium-containing ceramic fiber blanket, which is much cheaper than alumina ceramic fiber blanket. At the same time, its high temperature resistance can reach up to 1400°C, which can fully meet the use requirements of medium-temperature box furnaces and high-temperature kilns in my country (below 1000°C).

[0031] Wherein, the fireproof layer 10 is silicon crystal fiber fireproof wool or ceramic wool.

[0032] Specifically, Figure 1As shown, it also includes microporous calcium silicate rods 4, and multiple groups of microporous calcium silicate rods 4 are arranged in a linear array in the cavity 5. The microporous calcium silicate board has the characteristics of light capacity, high strength, low thermal conductivity and high temperature resistance. The microporous calcium silicate board is arranged in the cavity 5 and contacts with the upper and lower ceramic fiber blankets to support the ceramic fiber blankets and improve the strength of the thermal insulation layer.

[0033] Specifically, Figure 2 As shown, it also includes aluminum foil 6, and the inner surfaces of the ceramic fiber blanket 1 7 and the ceramic fiber blanket 2 3 are both bonded with aluminum foil 6. The aluminum foil 6 has a high reflectivity and further blocks heat radiation.

[0034] Specifically, Figure 3 As shown, the impact-resistant layer 9 includes a thin carbon fiber layer 91 and a thick carbon fiber layer 92. Both the thin carbon fiber layer 91 and the thick carbon fiber layer 92 are woven in a unidirectional twill, and the twill directions of the thin carbon fiber layer 91 and the thick carbon fiber layer 92 are different. The thick carbon fiber layer 92 and the thin carbon fiber layer 91 are combined with each other to make the fiber transverse strength of the thermal insulation layer higher. The thick carbon fiber layer 92 and the thin carbon fiber layer 91 are bonded with a carbon fiber adhesive under high pressure, so that the thick carbon fiber layer 92 and the thin carbon fiber layer 91 are more tightly combined to form an integrated structure. The thickness of the thick carbon fiber layer 92 is 2 to 2.5 times that of the thin carbon fiber layer 91. The thick carbon fiber layer 92 and the thin carbon fiber layer 91 are combined with each other to make the fiber transverse strength of the thermal insulation layer higher.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A medium temperature box furnace insulation layer structure, comprising a ceramic fiber blanket, characterized in that: The ceramic fiber blanket comprises a ceramic fiber blanket 1 (7) and a ceramic fiber blanket 2 (3), wherein a cavity (5) is provided between the two sets of ceramic fiber blankets, the outer surface of the ceramic fiber blanket 1 (7) is bonded outwardly with a metal mesh 1 (8), an impact-resistant layer (9) and a fireproof layer (10) in sequence by a high-temperature-resistant adhesive, the outer surface of the ceramic fiber blanket 2 (3) is bonded with a metal mesh 2 (2) by a high-temperature-resistant adhesive, and the outer surface of the metal mesh 2 (2) is sprayed with a high-temperature-resistant coating layer (1); It also includes microporous calcium silicate rods (4), wherein a plurality of groups of microporous calcium silicate rods (4) are arranged in a linear array in the cavity (5); It also includes aluminum foil (6), and the inner surfaces of the ceramic fiber blanket 1 (7) and the ceramic fiber blanket 2 (3) are both bonded with the aluminum foil (6).

2. The medium temperature box furnace insulation layer structure according to claim 1, characterized in that: The ceramic fiber blanket one (7) is an alumina ceramic fiber blanket, and the ceramic fiber blanket two (3) is a zirconium-containing ceramic fiber blanket.

3. The medium temperature box furnace insulation layer structure according to claim 1, characterized in that: The impact-resistant layer (9) comprises a thin carbon fiber layer (91) and a thick carbon fiber layer (92), the two groups of carbon fiber layers are woven in unidirectional twill, and their twill directions are different, and the two groups of carbon fiber layers are bonded together by a carbon fiber adhesive under high pressure.

4. The medium temperature box furnace insulation layer structure according to claim 3, characterized in that: The thickness of the thick carbon fiber layer (92) is 2 to 2.5 times that of the thin carbon fiber layer (91).

5. The medium temperature box furnace insulation layer structure according to claim 1, characterized in that: The fireproof layer (10) is silicon crystal fiber fireproof wool or ceramic wool.

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