Heat preservation structure of combustion chamber of industrial kiln

Abstract

The utility model discloses a heat preservation structure of a combustion chamber of an industrial kiln, which relates to the technical field of combustion chambers of industrial kilns and comprises a combustion chamber main body, and the inner wall of the combustion chamber main body is fixedly connected with a heat insulation base frame. An outer splicing type heat preservation layer, a middle heat reflecting layer and an inner heat preservation layer are sequentially and fixedly connected into the heat insulation base frame through ceramic screws, the outer splicing type heat preservation layer is attached to the inner wall of the combustion chamber body, and the inner heat preservation layer is arranged on the side away from the inner wall of the combustion chamber body. Heat is insulated through the heat preservation layer, meanwhile, infrared rays are reflected through the middle heat reflection layer, radiant heat loss is reduced, heat transfer is blocked through the outer splicing type heat preservation layer, and therefore the heat preservation effect of the combustion chamber body is improved, and heat loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial kiln combustion chamber technical field especially, relates to a kind of heat preservation structure of industrial kiln combustion chamber. BACKGROUND

[0002] Industrial kiln combustion chamber is the key core space in industrial kiln, it is the specific area that fuel and combustion air are fully mixed and carry out violent combustion chemical reaction.In this space, fuel rapidly releases a large amount of heat energy, and high-temperature flame and hot flue gas generated by combustion provide sustained and efficient heat input for the heating, smelting, drying, calcination and other industrial processes in the kiln, and the design structure, size, internal airflow organization and selection of refractory material all play a decisive role in combustion efficiency, temperature uniformity and overall performance of the kiln.

[0003] As China patent publication No. CN104990407B discloses a new energy-saving kiln heat preservation structure. In the structure, the kiln wall above the roller hole brick is provided with vertically arranged lightweight mullite bricks, low-iron high-aluminum bricks, low-density large block foam insulation bricks, high-aluminum cotton boards, nano insulation boards and ordinary cotton boards from the fire surface to the outside of the wall. The lightweight mullite bricks and low-iron high-aluminum bricks with slightly higher specific gravity are hung on the kiln roof, and the low-density large block foam insulation bricks, high-aluminum cotton boards, nano insulation boards and ordinary cotton boards are fixed on the side wall frame. The lightweight brick wall above the roller hole is hung by the top bracket and hook, so that the roller hole brick does not need to bear the weight of the brick wall above the roller hole.

[0004] However, the traditional industrial kiln combustion chamber often uses single-layer refractory bricks or insulation cotton structure for heat preservation, but the single-layer refractory bricks or insulation cotton structure has significant sealing problems. Due to material properties and installation process factors, during the operation of the kiln, gaps and holes are easily formed, leading to uncontrolled heat exchange process. The intrusion of external cold air and the escape of internal high-temperature gas not only destroys the stable thermal environment inside the kiln, but also causes a large amount of heat loss. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the problem of poor sealing of single-layer refractory bricks or insulation cotton structure used in traditional industrial kiln combustion chamber, which easily leaks heat and causes significant heat loss, and proposes a heat preservation structure for industrial kiln combustion chamber.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: A kind of heat preservation structure of industrial kiln combustion chamber, including combustion chamber main body, the inner wall of the combustion chamber main body is fixedly connected with heat insulation base frame, ceramic screw is sequentially fixedly connected with outer spliced heat preservation layer, intermediate heat reflection layer and inner heat preservation layer in the inside of the heat insulation base frame, the outer spliced heat preservation layer is attached in combustion chamber main body inner wall, the inner heat preservation layer is arranged at the side away from combustion chamber main body inner wall.

[0007] Preferably, the outer spliced heat preservation layer includes a carbonated cover plate layer and an aerogel thermal insulation layer, the carbonated cover plate layer is arranged in a high-temperature area of the combustion chamber main body inner wall, and the aerogel thermal insulation layer is arranged in the high-temperature area of the combustion chamber main body inner wall.

[0008] Preferably, the intermediate heat reflection layer includes a ceramic transition layer and a high-reflection aluminum film layer, and the high-reflection aluminum film layer is attached to one side of the ceramic transition layer.

[0009] Preferably, the thickness of the high-reflection aluminum film layer ranges from 0.3 to 0.5 mm.

[0010] Preferably, one side of the inner heat preservation layer is provided with a mounting groove.

[0011] Preferably, the mounting groove is fixedly bonded with a silicon carbide fiber layer inside.

[0012] Compared with the prior art, the utility model has the advantages and positive effects that:

[0013] 1、In the utility model, the heat preservation layer insulates heat, the intermediate heat reflection layer reflects infrared rays, reduces radiant heat loss, and the outer spliced heat preservation layer blocks heat transfer, thereby improving the heat preservation effect of the combustion chamber main body and reducing heat loss.

[0014] 2、In the utility model, the aerogel thermal insulation layer has higher heat insulation efficiency in a low-temperature area, and the carbonated cover plate layer has better stability in a higher-temperature area, so that the outer spliced heat preservation layer reduces the loss of heat transfer and further improves the heat preservation and insulation efficiency of the industrial kiln combustion chamber. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A three-dimensional structure schematic diagram of the heat preservation structure of the industrial kiln combustion chamber is provided for the utility model;

[0016] Figure 2 A connection relationship schematic diagram between the heat insulation base frame and the outer spliced heat preservation layer, the intermediate heat reflection layer and the inner heat preservation layer in the heat preservation structure of the industrial kiln combustion chamber is provided for the utility model;

[0017] Figure 3This utility model provides a cross-sectional view of the heat insulation base, outer spliced ​​heat insulation layer, middle heat reflective layer and inner heat insulation layer in the heat insulation structure of the combustion chamber of an industrial kiln;

[0018] Figure 4 This utility model provides a cross-sectional view of the intermediate heat-reflecting layer in the heat insulation structure of the combustion chamber of an industrial kiln.

[0019] Legend: 1. Combustion chamber body; 11. Insulation base frame; 2. External spliced ​​insulation layer; 21. Carbonate cover plate layer; 22. Aerogel insulation layer; 3. Intermediate heat reflection layer; 31. Ceramic transition layer; 32. High reflective aluminum film layer; 4. Inner insulation layer; 41. Mounting groove; 42. Silicon carbide fiber layer. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a heat insulation structure for the combustion chamber of an industrial kiln, including a combustion chamber body 1. A heat insulation frame 11 is fixedly connected to the inner wall of the combustion chamber body 1. An outer spliced ​​heat insulation layer 2, an intermediate heat reflection layer 3, and an inner heat insulation layer 4 are sequentially fixedly connected inside the heat insulation frame 11 by ceramic screws. The outer spliced ​​heat insulation layer 2 is attached to the inner wall of the combustion chamber body 1. The inner heat insulation layer 4 is located on the side away from the inner wall of the combustion chamber body 1. The intermediate heat reflection layer 3 includes a ceramic transition layer 31 and a high-reflectivity aluminum film layer 32. The high-reflectivity aluminum film layer 32 is attached to one side of the ceramic transition layer 31. The thickness of the high-reflectivity aluminum film layer 32 ranges from 0.3 to 0.5 mm.

[0023] The specific settings and functions of this embodiment are described in detail below. When the fuel inside the combustion chamber body 1 is burned, it generates corresponding heat. The heat is insulated by the inner insulation layer 4, while the intermediate heat reflection layer 3 reflects infrared rays, reducing radiative heat loss. The outer spliced ​​insulation layer 2 blocks heat transfer, thereby improving the insulation effect of the combustion chamber body 1 and reducing heat loss. The heat insulation frame 11 is made of graphene-reinforced mica sheets and alumina ceramic fiber paper stacked alternately, thereby extending the heat transfer path of the heat insulation frame 11 and uniformly transferring heat. The ceramic transition layer 31 in the intermediate heat reflection layer 3 serves as the substrate, and the high-reflectivity aluminum film layer 32 on one side is made of aluminum foil through anodizing treatment, which can efficiently reflect infrared waves.

[0024] Example 2: Figure 1 - Figure 3 As shown, the thermal insulation structure of the industrial kiln combustion chamber in this utility model includes a combustion chamber body 1. A heat insulation base frame 11 is fixedly connected to the inner wall of the combustion chamber body 1. An outer spliced ​​thermal insulation layer 2, an intermediate heat reflective layer 3, and an inner thermal insulation layer 4 are sequentially fixedly connected inside the heat insulation base frame 11 by ceramic screws. The outer spliced ​​thermal insulation layer 2 is attached to the inner wall of the combustion chamber body 1. The inner thermal insulation layer 4 is located on the side away from the inner wall of the combustion chamber body 1. The outer spliced ​​thermal insulation layer 2 includes a carbonate cover plate layer 21 and an aerogel thermal insulation layer 22. The carbonate cover plate layer 21 is located in the high-temperature area of ​​the inner wall of the combustion chamber body 1, and the aerogel thermal insulation layer 22 is located in the high-temperature area of ​​the inner wall of the combustion chamber body 1. An installation groove 41 is opened on one side of the inner thermal insulation layer 4. A silicon carbide fiber layer 42 is fixedly bonded inside the installation groove 41.

[0025] The overall effect of this embodiment is that the aerogel insulation layer 22 in the outer spliced ​​insulation layer 2 has higher insulation efficiency in the low temperature range, and the carbonate cover layer 21 has better stability in the higher temperature range. The two complement each other, thereby reducing the heat transfer loss of the outer spliced ​​insulation layer 2 and further improving the insulation efficiency of the industrial kiln combustion chamber. By fixing and bonding a silicon carbide fiber layer 42 to one side of the inner insulation layer 4, the silicon carbide fiber generates SiC whiskers at high temperature, which increases the reflectivity of 3-5μm infrared waves to 88%, thereby improving the insulation effect of the industrial kiln combustion chamber.

[0026] The method for using and the working principle of the device are as follows: when the fuel in the combustion chamber main body 1 is combusted, corresponding heat is generated, the heat is insulated by the inner insulation layer 4, meanwhile, the intermediate heat reflecting layer 3 reflects infrared rays, reduces the loss of radiant heat, and the outer spliced insulation layer 2 blocks the heat transfer, thereby improving the insulation effect of the combustion chamber main body 1; the aerogel heat insulation layer 22 in the outer spliced insulation layer 2 has higher heat insulation efficiency in the low temperature zone, and the carbon acid cover plate layer 21 has better stability in the higher temperature zone, and the two are complementary, thereby reducing the loss of heat transfer of the outer spliced insulation layer 2; the silicon carbide fiber layer 42 is fixedly bonded on one side of the inner insulation layer 4, and the silicon carbide fiber generates SiC whisker under high temperature, and the reflectivity of 3-5 mu infrared waves is increased to 88%.

[0027] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments without departing from the technical scheme of the present application, according to the technical essence of the present application, still belong to the protection scope of the technical scheme of the present application.

Claims

1. A heat-insulating structure of a combustion chamber of an industrial furnace, comprising a combustion chamber main body (1), characterized in that: The inner wall of the combustion chamber body (1) is fixedly connected with a heat insulation base frame (11), the inside of the heat insulation base frame (11) is sequentially fixedly connected with an outer spliced heat preservation layer (2), an intermediate heat reflection layer (3) and an inner heat preservation layer (4) through ceramic screws, the outer spliced heat preservation layer (2) is attached to the inner wall of the combustion chamber body (1), and the inner heat preservation layer (4) is arranged on the side away from the inner wall of the combustion chamber body (1).

2. A heat retaining structure for a combustion chamber of an industrial furnace according to claim 1, characterized in that: The outer spliced heat preservation layer (2) comprises a carbonic acid cover plate layer (21) and an aerogel heat insulation layer (22), the carbonic acid cover plate layer (21) is arranged in the high-temperature area of the inner wall of the combustion chamber body (1), and the aerogel heat insulation layer (22) is arranged in the high-temperature area of the inner wall of the combustion chamber body (1).

3. A heat retaining structure for a combustion chamber of an industrial furnace according to claim 1, characterized in that: The intermediate heat reflection layer (3) comprises a ceramic transition layer (31) and a high-reflection aluminum film layer (32), and the high-reflection aluminum film layer (32) is attached to one side of the ceramic transition layer (31).

4. A heat retaining structure for a combustion chamber of an industrial furnace according to claim 3, wherein: The thickness of the high-reflection aluminum film layer (32) ranges from 0.3 to 0.5 mm.

5. An insulation structure for a combustion chamber of an industrial furnace according to claim 1, characterized in that: One side of the inner heat preservation layer (4) is provided with a mounting groove (41).

6. An insulation structure for a combustion chamber of an industrial furnace according to claim 5, characterized in that: The inside of the mounting groove (41) is fixedly bonded with a silicon carbide fiber layer (42).

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