Refractory fiber composite layer lining structure of industrial furnace

Abstract

The utility model relates to the technical field of inner linings of industrial furnaces, in particular to a refractory fiber composite layer lining structure of an industrial furnace, which comprises a furnace wall steel plate, a silicon carbide fiber layer and a ceramic fiber layer are arranged on the front side of the furnace wall steel plate, and a left partition plate and a right partition plate are respectively adhered to two sides of the silicon carbide fiber layer and the ceramic fiber layer. A supporting assembly is arranged at the top of the left partition plate and the top of the right partition plate, honeycomb holes are formed in the surfaces of the left partition plate and the right partition plate, the supporting assembly comprises a sleeve and an improved lining structure, the left partition plate and the right partition plate are arranged to be of a curved surface structure, the left partition plate and the right partition plate are attached to each other in a curved surface mode, sealing performance is improved, and the honeycomb holes can be compressed; and the supporting force is provided through the supporting assembly, rapid installation of the upper row and the lower row is achieved, the volume of liquid sodium obtained after the sodium metal block is melted can be compressed to a certain degree at the high temperature, the pressing block slides down, the materials in the upper row and the lower row are tightly attached, and the sealing effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial furnace internal lining technical field, concretely is fire -resistant fibre composite layer lining structure of industrial furnace. BACKGROUND

[0002] Industrial furnace internal lining refers to the refractory material layer installed on the inner wall of the industrial furnace, which is used to protect the furnace body, reduce heat loss, prolong the service life of the furnace body, and ensure the stability of the reaction environment in the furnace. The lining material needs to have excellent high-temperature resistance, corrosion resistance, wear resistance, thermal expansion performance, and can withstand high temperature, chemical corrosion, mechanical impact and other harsh working conditions in the furnace. According to different furnace types and use environment, the selection of lining material will be different. The inventor found that the prior art has the following problems in the process of realizing the utility model:

[0003] 1. The existing lining material will experience a certain degree of thermal expansion in high temperature environment. Due to the fluctuation of the temperature in the furnace, the volume of the lining material will also change accordingly. Therefore, a certain gap will be reserved when installing side by side. The size of the gap cannot be accurately controlled. If there is not enough gap between the linings, thermal expansion may cause the material to crack or peel off. In extreme cases, it may even endanger the structural stability of the furnace body. When the gap is large, the flowability of the airflow in the furnace will increase, resulting in uneven heat transfer and retention, and thus increasing heat loss.

[0004] 2. During installation, the linings are stacked one by one. During the stacking process, a gap needs to be left between the upper and lower rows of lining materials during installation. External force is usually needed to ensure the stability of the lining during installation, making the installation process more complex and difficult. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims to provide a fire-resistant fiber composite lining structure for industrial furnace to solve the problem of gap control between lining modules when installed side by side, and the problem of gap reservation between the upper and lower groups when stacked, which needs external force and a complicated installation process. To achieve the above purpose, the utility model provides the following technical scheme: a fire-resistant fiber composite lining structure for industrial furnace, comprising a furnace wall steel plate, the front surface of the furnace wall steel plate is provided with a silicon carbide fiber layer and a ceramic fiber layer, the two sides of the silicon carbide fiber layer and the ceramic fiber layer are respectively bonded with a left partition plate and a right partition plate, the top of the left partition plate and the right partition plate is provided with a support assembly, and the surface of the left partition plate and the right partition plate is provided with a honeycomb hole.

[0006] The support assembly comprises a sleeve, the inner wall bottom of the sleeve is provided with a sodium metal block, the inner wall top of the sleeve is slidably connected with a pressing block, and the outer part of the sleeve is sleeved with a carbon steel spring.

[0007] Further preferably, the silicon carbide fiber layer and the ceramic fiber layer are arranged in three groups, and gaps exist between the groups.

[0008] Further preferably, the outer walls of the left partition plate and the right partition plate are arranged in curved surface structures, and the outer walls of the left partition plate and the right partition plate are attached to each other.

[0009] Further preferably, the plurality of honeycomb holes are randomly distributed at edges of the left partition plate and the right partition plate.

[0010] Further preferably, the top of the carbon steel spring and the bottom of the pressing block are welded.

[0011] Further preferably, a sealing structure is formed between the pressing block and the sleeve, and the sodium metal block is tightly attached to the lower surface of the pressing block.

[0012] Further preferably, heat-resistant steel anchors are arranged in the interior of the furnace wall steel plate, the silicon carbide fiber layer and the ceramic fiber layer.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] In the present application, the left partition plate and the right partition plate are arranged in curved surface structures, and are made of expanded graphite material, which has excellent fireproof and high-temperature-resistant properties. The expanded graphite can expand rapidly under high temperature to form a barrier for heat insulation and fire insulation. The outer edges of the left partition plate and the right partition plate are arranged in curved surface structures to increase the contact area and improve the sealing property. If the temperature in the furnace continuously increases, the left partition plate and the right partition plate are pressed against each other, and the honeycomb holes can be compressed to avoid excessive tightness between the materials and damage, thereby maintaining the stability of the furnace.

[0015] In the present application, the support assembly is arranged at the top of the left partition plate and the right partition plate. When the support assembly is installed, the carbon steel spring and the sodium metal block support the pressing block to prevent the lining material of the upper row from pressing the material of the lower row, provide support force, realize rapid installation, and the melting point of the sodium metal block is low. When the temperature in the furnace increases, the sodium metal block melts into liquid. The compressibility of the liquid sodium is low under normal temperature and pressure, but under extremely high pressure, the volume of the liquid sodium is also compressed to a certain extent, thereby reserving space for the pressing block to slide down. The pressing block slides down and is accommodated in the interior of the left partition plate and the right partition plate, and the materials of the upper row and the lower row are tightly attached to each other to achieve the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0017] Figure 2 It is a schematic diagram of the structure of the left partition plate and the right partition plate after being attached to each other;

[0018] Figure 3 It is the left partition plate sectional view structure schematic diagram of the utility model;

[0019] Figure 4 It is the support assembly sectional view structure schematic diagram of the utility model.

[0020] In the drawing: 1, furnace wall steel plate; 2, silicon carbide fiber layer; 3, ceramic fiber layer; 4, left partition plate; 5, right partition plate; 6, support assembly; 601, sleeve; 602, sodium metal block; 603, pressing block; 604, carbon steel spring; 7, honeycomb hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of protection of the utility model.

[0022] Please refer to Figures 1 to 4 The utility model provides a technical scheme: the refractory fiber composite layer lining structure of industrial furnace, including furnace wall steel plate 1, the front of furnace wall steel plate 1 is equipped with silicon carbide fiber layer 2 and ceramic fiber layer 3, and the two sides of silicon carbide fiber layer 2 and ceramic fiber layer 3 are respectively bonded with left partition plate 4 and right partition plate 5, the top of left partition plate 4 and right partition plate 5 is equipped with support assembly 6, and the surface of left partition plate 4 and right partition plate 5 is equipped with honeycomb hole 7.

[0023] Support assembly 6 includes sleeve 601, the inner wall bottom of sleeve 601 is equipped with sodium metal block 602, the inner wall top of sleeve 601 is slidably connected with pressing block 603, and the outside of sleeve 601 is sleeved with carbon steel spring 604.

[0024] In the embodiment, as Figure 1 Shown, silicon carbide fiber layer 2 and ceramic fiber layer 3 are equipped as a group, and there are three groups, and there is a gap between the components;It should be noted that, silicon carbide fiber layer 2 and ceramic fiber layer 3 all, ceramic fiber layer 3 is a kind of fibrous material made of high-temperature stable inorganic material, has excellent fire resistance and thermal insulation, silicon carbide fiber layer 2 is a kind of inorganic compound with high hardness, high strength and extremely high temperature resistance, its melting point is higher, and has good thermal conductivity and oxidation resistance, stack distribution, improve the overall fire resistance and thermal insulation performance, the space reserved for material expansion in the middle gap.

[0025] In the embodiment, as Figure 1 And Figure 2As shown, the outer walls of the left partition plate 4 and the right partition plate 5 are provided as curved surface structures, and the outer walls of the left partition plate 4 and the right partition plate 5 are mutually adhered; it should be noted that the left partition plate 4 and the right partition plate 5 are provided as curved surface structures, and when installed side by side, the outer edges of the left partition plate 4 and the right partition plate 5 form curved surface adhesion, increasing the contact area with both and improving the sealing performance.

[0026] In the embodiment, as shown in Figure 1 , the honeycomb holes 7 are arranged at the edges of the left partition plate 4 and the right partition plate 5; it should be noted that the left partition plate 4 and the right partition plate 5 are made of expanded graphite material, which has excellent fireproof and high-temperature-resistant properties; the expanded graphite can rapidly expand under high-temperature conditions to form a barrier for heat insulation and fire insulation; if the temperature in the furnace continues to increase, the left partition plate 4 and the right partition plate 5 are pressed against each other after being adhered, and the honeycomb holes 7 can be compressed to avoid excessive adhesion between the materials and cause damage, thereby maintaining the stability of the furnace.

[0027] In the embodiment, as shown in Figure 3 and Figure 4 , the top of the carbon steel spring 604 and the bottom of the pressing block 603 are welded; it should be noted that the carbon steel spring 604 has a high melting point and a certain supporting property; during installation, the pressing block 603 is supported by the carbon steel spring 604 and the sodium metal block 602, which can prevent the upper row of lining materials from pressing the lower row of materials to provide supporting force, thereby achieving rapid installation.

[0028] In the embodiment, as shown in Figure 4 , the pressing block 603 and the sleeve 601 form a sealing structure, and the sodium metal block 602 is tightly adhered to the lower surface of the pressing block 603; it should be noted that the melting point of the sodium metal block 602 is relatively low; when the temperature in the furnace increases, the sodium metal block 602 melts into a liquid; the compressibility of the liquid sodium is relatively low under normal temperature and pressure, but under extremely high pressure, its volume will also be compressed to a certain extent, thereby reserving space for the downward sliding of the pressing block 603.

[0029] In the embodiment, as shown in Figure 1 , heat-resistant steel anchors are arranged inside the furnace wall steel plate 1, the silicon carbide fiber layer 2, and the ceramic fiber layer 3; it should be noted that the main function of the heat-resistant steel anchors is to ensure stable connection between the silicon carbide fiber layer 2, the ceramic fiber, and the furnace wall steel plate 1, and to withstand long-term high temperature or thermal shock.

[0030] The use method and advantages of the industrial furnace with the refractory fiber composite layer lining structure are as follows:

[0031] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, first, the horizontal installation is carried out, the right partition plate 5 of the left lining material is aligned with the left partition plate 4 of the left lining material, a certain gap is reserved between the two, and then the installation is sequentially carried out around the furnace wall steel plate 1 in the industrial furnace, then the vertical installation is carried out, the left partition plate 4 and the right partition plate 5 of the second row are respectively aligned with the left partition plate 4 and the right partition plate 5 of the first row, the second row of materials is supported through the pressing block 603, the sodium metal block 602 and the carbon steel spring 604, after the installation is completed, when the temperature in the furnace rises, the left partition plate 4 and the right partition plate 5 expand, the curved surfaces of the left partition plate 4 and the right partition plate 5 first contact and fit, with the continuous rise of the temperature in the furnace, the sodium metal block 602 begins to melt into liquid, the second row of materials begins to expand and compress and extrude the pressing block 603, the pressing block 603 slides downward and extrudes the liquid sodium and the steel spring, until the pressing block 603 is accommodated in the left partition plate 4 and the right partition plate 5, the materials in the upper row and the lower row are tightly fitted, the overall sealing and heat insulation effect of the internal lining is maintained.

[0032] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by the technical personnel in the industry that the present application is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only preferred examples of the present application, and are not used to limit the present application, various changes and improvements of the present application can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A refractory fibre composite lining structure for an industrial furnace, comprising a furnace wall steel plate (1), characterised in that: The front of the furnace wall steel plate (1) is provided with a silicon carbide fiber layer (2) and a ceramic fiber layer (3), the two sides of the silicon carbide fiber layer (2) and the ceramic fiber layer (3) are respectively bonded with a left partition plate (4) and a right partition plate (5), the top of the left partition plate (4) and the right partition plate (5) is provided with a support assembly (6), and the surface of the left partition plate (4) and the right partition plate (5) is provided with a honeycomb hole (7). The support assembly (6) comprises a sleeve (601), the inner wall bottom of the sleeve (601) is provided with a sodium metal block (602), the inner wall top of the sleeve (601) is slidably connected with a pressing block (603), and the outer portion of the sleeve (601) is sleeved with a carbon steel spring (604).

2. The industrial furnace refractory fiber composite lining structure according to claim 1, characterized in that: The silicon carbide fiber layer (2) and the ceramic fiber layer (3) are arranged in groups, there are three groups in total, and gaps exist between the groups.

3. The industrial furnace refractory fiber composite lining structure according to claim 1, wherein: The outer walls of the left partition plate (4) and the right partition plate (5) are both curved structures, and the outer walls of the left partition plate (4) and the right partition plate (5) are mutually adhered.

4. The industrial furnace refractory fiber composite lining structure of claim 1, wherein: The honeycomb holes (7) are arranged in a plurality of groups, and the plurality of honeycomb holes (7) are randomly distributed on the edges of the left partition plate (4) and the right partition plate (5).

5. The industrial furnace refractory fiber composite lining structure according to claim 1, wherein: The top of the carbon steel spring (604) and the bottom of the pressing block (603) are welded.

6. The industrial furnace refractory fiber composite lining structure of claim 1, wherein: The pressing block (603) and the sleeve (601) form a sealing structure, and the sodium metal block (602) is tightly adhered to the lower surface of the pressing block (603).

7. The industrial furnace refractory fiber composite lining structure of claim 1, wherein: The inside of the furnace wall steel plate (1), the silicon carbide fiber layer (2) and the ceramic fiber layer (3) is penetrated by a heat-resistant steel anchor.

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