Furnace wall module lining structure

Abstract

The utility model relates to the technical field of heating furnaces, and discloses a furnace wall module lining structure which comprises a furnace wall body, the furnace wall body sequentially comprises a furnace shell, a ceramic fiber backing and a ceramic fiber lining from outside to inside, a plurality of groups of anchor bolts are arranged on the inner side of the furnace shell, and the ceramic fiber lining comprises a plurality of groups of ceramic fiber cushion layers and ceramic fiber module layers. The ceramic fiber cushion layers and the ceramic fiber module layers are arranged at intervals from bottom to top, every two adjacent layers of ceramic fiber modules are arranged in a staggered mode, and anchoring parts corresponding to the anchoring bolts are arranged on the ceramic fiber modules. The modular design is adopted, construction is convenient, gaps between the modules are small, the fireproof and heat preservation effects are good, and the using effect of the heating furnace is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating furnace technical field especially relates to a furnace wall module lining structure. BACKGROUND

[0002] The vertical flue gas generating furnace is a kind of air heating furnace, commonly used for heating material or performing the tasks of drying and heat treatment, belongs to industrial kiln. Among them, furnace wall is an important component of vertical flue gas generating furnace, mainly used for protecting furnace shell and reducing heat loss. Vertical flue gas generating furnace is fueled by natural gas, flue gas is sent to the next process after dust removal, desulfurization, drying and other processes, and material is heated and dried, and the heating furnace is widely used in petrochemical catalyst production enterprises.

[0003] In recent years, ceramic fiber, as a kind of refractory material with light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical vibration resistance, is widely used in heating furnace, such as the Chinese utility model patent with the patent number ZL202021244831.0 discloses an annealing furnace lining for reducing atmosphere, mainly including a plurality of fixing pieces arranged on the inner side of furnace wall, corrosion and thermal radiation coating distributed along the inner side of furnace wall and fixing piece, composite silicate layer located in the inner side of corrosion and thermal radiation coating and high-temperature resistant module located in the inner side of composite silicate layer, one end of fixing piece is fixedly connected with furnace wall, the other end is arranged in high-temperature resistant module, and corrosion and thermal radiation coating adopts heat-reflecting heat-insulating anticorrosive coating.

[0004] At least the following problems exist in the above-mentioned patent: the high-temperature resistant modules directly contact each other, there is a gap between the two adjacent groups of high-temperature resistant modules, the internal air flows to generate convection heat transfer, which affects the heat preservation effect. UTILITY MODEL CONTENTS

[0005] The utility model in the prior art, develop a kind of furnace wall module lining structure, the utility model adopts modular design, facilitate construction, small gap between module, refractory and heat preservation effect is good, effectively improve the use effect of heating furnace.

[0006] The technical scheme for solving the technical problems of the utility model is as follows: a furnace wall module lining structure, comprising a furnace wall body, the furnace wall body comprises a furnace shell, a ceramic fiber backing and a ceramic fiber lining from outside to inside in sequence, a plurality of groups of anchor bolts are arranged on the inner side of the furnace shell, the ceramic fiber lining comprises a plurality of groups of ceramic fiber cushion layers and ceramic fiber modules, the ceramic fiber cushion layers and the ceramic fiber modules are arranged in intervals from bottom to top, the ceramic fiber modules of adjacent two layers are arranged in staggered mode, and anchor pieces corresponding to the anchor bolts are arranged on the ceramic fiber modules.

[0007] As optimization, the ceramic fiber backing comprises several layers of first ceramic fiber blankets laid from outside to inside in turn, and the two adjacent layers of first ceramic fiber blankets are arranged in staggered mode. The ceramic fiber has a diameter of about 3-5 μm and is arranged in disorder, and after compaction, a large number of tiny irregular gaps are formed between the fibers, which can increase the thermal conduction and thermal convection resistance and have a good heat preservation and insulation effect.

[0008] As optimization, a corrosion and dew point prevention coating is arranged between the furnace shell and the ceramic fiber backing. By arranging the corrosion and dew point prevention coating, the corrosion of the furnace shell by the acidic flue gas or liquid can be prevented.

[0009] As optimization, an aluminum foil paper is arranged between the ceramic fiber backing and the ceramic fiber lining. By arranging the aluminum foil paper, the heat radiation can be reflected to improve the heat preservation and insulation effect; the interface of different materials in different heat transfer directions can be increased to increase the thermal conduction resistance; the water vapor can be sealed to separate the ceramic fiber backing and the ceramic fiber lining to prevent the acidic liquid from being formed by the penetration of the flue gas and then being liquefied to corrode the furnace shell.

[0010] As optimization, a nano infrared coating is arranged on the side of the ceramic fiber lining away from the ceramic fiber backing. By arranging the nano infrared coating, the heat energy can be efficiently converted into infrared radiation to improve the heat exchange in the furnace, increase the temperature, field strength and uniformity in the hearth, make the fuel burn more fully, thereby increasing the thermal efficiency, reducing the energy consumption and saving the energy; the furnace wall can be divided into two independent and sealed annular spaces in the thickness direction of the furnace wall by cooperating with the furnace shell and the aluminum foil paper to reduce the convection heat transfer generated by the internal air flow, thereby further improving the heat preservation and insulation effect.

[0011] As optimization, the ceramic fiber module is a second ceramic fiber blanket in an "S" shape. The ceramic fiber module can be conveniently prefabricated and the expansion direction of the ceramic fiber module is the circumferential direction of the hearth, so that the ceramic fiber module can be pressed after expansion to realize seamless connection with the ceramic fiber modules adjacent to the left and right ends to increase the sealing property. The height direction of the hearth is the non-expansion direction of the ceramic fiber module, so that the expansion heights of the ceramic fiber modules in the same layer can be consistent to avoid the misalignment and gap of the ceramic fiber mat layer.

[0012] As optimization, the thickness of the ceramic fiber backing is 50-80 mm and the thickness of the ceramic fiber module is 300-330 mm. By arranging the thickness of the ceramic fiber backing to be 50-80 mm, the distance between the aluminum foil paper and the furnace shell can be 50-80 mm, the temperature at the position of the aluminum foil paper is 100-200 ℃, which is higher than the dew point of the flue gas, the acidic liquid cannot be generated, the aluminum foil paper will not be corroded, and the aluminum foil paper is not easy to be oxidized and damaged at this temperature, and has a good reflection effect.

[0013] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0014] By setting the furnace shell, ceramic fiber backing and ceramic fiber lining, the weight of the heating furnace can be greatly reduced, the equipment volume is reduced, the requirements and limitations of the plant foundation load and space are reduced, and the modular construction can simplify and speed up the construction speed; by setting the ceramic fiber pad layer and the ceramic fiber module, the ceramic fiber lining can be quickly constructed, the ceramic fiber pad layer can fill and reduce the gap between the upper and lower two layers of ceramic fiber module layers, so that the formed ceramic fiber lining has good airtightness, reduces the flow of internal air and reduces the convective heat transfer, and improves the fire resistance and heat preservation effect; by setting the anchor bolt and the anchor, the ceramic fiber module can be fixed. The utility model discloses a modular design, convenient construction, small gap between modules, good fire resistance and heat preservation effect, and effectively improves the use effect of the heating furnace. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the furnace wall module lining structure in an embodiment of the utility model.

[0016] In the figure: 1, furnace shell;2, anticorrosive dew point coating;3, ceramic fiber backing;4, aluminum foil paper;5, ceramic fiber lining;6, nano infrared coating;7, ceramic fiber pad layer;8, ceramic fiber module;9, anchor bolt;10, anchor. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of the scheme, the utility model is described in detail below through specific implementation mode, and combined with its drawings.

[0018] Embodiment 1

[0019] Figure 1 It is an embodiment of the utility model, as shown in Figure 1 A furnace wall module lining structure, including furnace wall body, furnace wall body includes furnace shell 1, ceramic fiber backing 3 and ceramic fiber lining 5 from outside to inside in proper order, the inner side of furnace shell 1 is equipped with a plurality of groups of anchor bolt 9, ceramic fiber lining 5 includes a plurality of groups of ceramic fiber pad layer 7 and ceramic fiber module 8, ceramic fiber pad layer 7 and ceramic fiber module 8 are arranged by interval from below to above, the ceramic fiber module 8 of adjacent two layers is set in staggered mode, and the anchor 10 corresponding with anchor bolt 9 is set on ceramic fiber module 8.

[0020] By setting the furnace shell 1, the ceramic fiber backing 3 and the ceramic fiber lining 5, the weight of the heating furnace can be greatly reduced, the equipment volume is reduced, the requirements and limitations of the factory building foundation, load and space are reduced, and the modular construction can simplify and speed up the construction speed; By setting the ceramic fiber pad layer 7 and the ceramic fiber module 8, the ceramic fiber lining 5 can be quickly constructed, the ceramic fiber pad layer 7 can fill and reduce the gap between the upper and lower two layers of ceramic fiber modules 8, so that the formed ceramic fiber lining 5 has good airtightness, reduces the flow of internal air to reduce convective heat transfer, and improves the fire resistance and thermal insulation effect; By setting the anchor bolt 9 and the anchor 10, the ceramic fiber module 8 can be fixed.

[0021] As shown in Figure 1 The ceramic fiber backing 3 includes a plurality of layers of first ceramic fiber blankets laid from the outside to the inside in sequence, and the adjacent two layers of first ceramic fiber blankets are arranged in a staggered manner. The diameter of the ceramic fiber is about 3-5 μm, and the fibers are arranged in disorder. After compaction, a large number of irregular gaps are formed between the fibers, which can increase the thermal conduction and convection resistance, and have good thermal insulation effect.

[0022] As shown in Figure 1 A corrosion and dew point resistant coating 2 is arranged between the furnace shell 1 and the ceramic fiber backing 3. By setting the corrosion and dew point resistant coating 2, the corrosion of the furnace shell 1 by acidic flue gas or liquid can be prevented.

[0023] As shown in Figure 1 An aluminum foil 4 is arranged between the ceramic fiber backing 3 and the ceramic fiber lining 5. By setting the aluminum foil 4, the thermal insulation effect can be improved by reflecting heat radiation. The interface of different materials in the heat transfer direction can be increased, the thermal resistance can be increased, the water vapor can be sealed, the ceramic fiber backing 3 and the ceramic fiber lining 5 can be separated, the acid liquid formed by the penetration of flue gas can be prevented, the corrosion of the furnace shell 1 can be prevented, the convective heat transfer caused by the flow of internal air can be reduced, and the thermal insulation effect can be further improved.

[0024] As shown in Figure 1 A nano infrared coating 6 is arranged on the side of the ceramic fiber lining 5 away from the ceramic fiber backing 3. By setting the nano infrared coating 6, the thermal energy can be efficiently converted into infrared radiation, the heat exchange in the furnace can be improved, the temperature, field strength and uniformity in the hearth can be improved, the fuel combustion can be more sufficient, the thermal efficiency can be increased, the energy consumption can be reduced, the energy can be saved, the furnace wall can be divided into two independent and airtight annular spaces in the thickness direction of the furnace wall by cooperating with the furnace shell 1 and the aluminum foil 4, the convective heat transfer caused by the flow of internal air can be reduced, and the thermal insulation effect can be further improved.

[0025] As shown in Figure 1As shown, the ceramic fiber module 8 is a second ceramic fiber blanket that is folded and compressed in an "S" shape. This allows the ceramic fiber module 8 to expand in the circumferential direction of the furnace chamber. After expansion, it can be squeezed with the adjacent ceramic fiber modules 8 at both ends to achieve a seamless connection and increase sealing. The height direction of the furnace chamber is the non-expansion direction of the ceramic fiber module 8, which can avoid inconsistent expansion heights of the ceramic fiber modules 8 in the same layer, resulting in misalignment and gaps in the ceramic fiber pad layer 7.

[0026] like Figure 1 As shown, the thickness of the ceramic fiber backing 3 is 50-80mm, and the thickness of the ceramic fiber module 8 is 300-330mm. By setting the thickness of the ceramic fiber backing 3 to 50-80mm, the distance between the aluminum foil 4 and the furnace shell 1 can be 50-80mm, so that the temperature at the location of the aluminum foil 4 is 100℃-200℃, which is higher than the flue gas dew point, preventing the formation of acidic liquids and corrosion of the aluminum foil 4. At this temperature, the aluminum foil 4 is not easily oxidized and damaged, and has a good reflective effect. In addition, the overall thickness of the furnace wall is small, which can reduce the requirements and restrictions on the foundation load and space of the plant.

[0027] During the construction of the ceramic fiber backing 3, the first ceramic fiber blanket needs to be joined using an overlapping process, laid flat, tight, and without gaps, with uniform thickness. When fixing the ceramic fiber module 8, the anchor bolt 9 passes through the anchor 10, and the nut is connected to the anchor bolt 9. After tightening the nut, the ceramic fiber backing 3 is compacted by the ceramic fiber module 8. The ceramic fiber module 8 can expand 20% to 30% along the circumference of the furnace, fully abutting and squeezing with the ceramic fiber modules 8 adjacent to the left and right ends. After compaction, countless small irregular gaps are formed between the ceramic fibers, which can increase heat conduction and heat convection resistance. Combined with the ceramic fiber pad 7, a ceramic fiber lining 5 with good airtightness is formed. The furnace shell 1, aluminum foil paper 4, and nano infrared coating 6 divide the furnace wall into two independent closed annular spaces in the thickness direction of the furnace wall, reducing the convective heat transfer generated by the internal air flow, thereby further improving the heat insulation effect, reducing gas consumption, and saving energy and protecting the environment. This utility model adopts a modular design, which facilitates construction. The gaps between modules are small, and the fire resistance and heat preservation effects are improved through various methods. This not only reduces the size and weight of the equipment, but also facilitates construction and effectively improves the performance of the heating furnace.

[0028] The descriptions of the orientation or relative positional relationships of the structure in this utility model, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer", are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A furnace wall module lining structure comprising a furnace wall body, characterized by, The furnace wall body comprises, from outside to inside, a furnace shell (1), a ceramic fiber backing (3) and a ceramic fiber lining (5), the inner side of the furnace shell (1) is provided with a plurality of groups of anchor bolts (9), the ceramic fiber lining (5) comprises a plurality of groups of ceramic fiber mat layers (7) and ceramic fiber modules (8), the ceramic fiber mat layers (7) and the ceramic fiber modules (8) are arranged in intervals from bottom to top, the ceramic fiber modules (8) of adjacent two layers are arranged in a staggered mode, and the ceramic fiber modules (8) are provided with anchor pieces (10) corresponding to the anchor bolts (9).

2. The furnace wall module lining structure according to claim 1, characterized in that: The ceramic fiber backing (3) comprises a plurality of layers of first ceramic fiber blankets which are sequentially laid from outside to inside, and adjacent two layers of the first ceramic fiber blankets are arranged in a staggered mode.

3. The furnace wall module lining structure according to claim 2, characterized in that: The furnace shell (1) and the ceramic fiber backing (3) are provided with a corrosion and dew point preventing coating (2).

4. The furnace wall module lining structure according to claim 2, characterized in that: The ceramic fiber backing (3) and the ceramic fiber lining (5) are provided with an aluminum foil paper (4).

5. The furnace wall module lining structure according to claim 2, characterized by: The ceramic fiber lining (5) is provided with a nano infrared coating (6) on the side away from the ceramic fiber backing (3).

6. A furnace wall module lining structure according to any one of claims 3 to 5, characterised in that: The ceramic fiber module (8) is a second ceramic fiber blanket in an "S" shape.

7. The furnace wall module lining structure according to claim 6, characterized in that: The thickness of the ceramic fiber backing (3) is 50-80 mm, and the thickness of the ceramic fiber module (8) is 300-330 mm.

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