Novel heating furnace lining structure
By setting up multi-layer heat insulation structures at different locations in the heating furnace, the problem of easy corrosion and detachment of the heating furnace lining was solved, achieving the effects of reducing heat loss and improving thermal efficiency.
Patent Information
- Application Number
- CN202423247932.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The existing heating furnace lining structure is prone to corrosion and detachment under high temperature environment, resulting in a decrease in thermal efficiency and serious heat loss from the furnace wall.
Different lining structures are adopted for different parts of the heating furnace, including the convection chamber, radiation chamber and furnace bottom lining. Materials such as hexagonal mesh, ceramic fiber modules, refractory castable materials and refractory bricks are used to form a multi-layer heat insulation structure and enhance the support system.
It effectively reduces the temperature of the outer wall of the furnace, reduces heat loss, enhances the heat preservation effect, ensures the long-term stable operation of the heating furnace, and provides convenience for maintenance.
Smart Images
Figure CN223564742U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the high temperature heating furnace technical field of chemical industry, especially a new type heating furnace lining structure. BACKGROUND
[0002] In the operation process of the heating furnace, heat loss is a main factor leading to the decline of its thermal efficiency. The lining of the heating furnace, as a key protective layer, after a long time of operation, due to the high temperature of flue gas, the anchor nail used by the traditional fixed lining material will face the risk of corrosion and falling off. Once the lining structure is damaged, it may lead to the thinning or even damage of the heating furnace wall, thus aggravating the loss of thermal efficiency. In view of this, it is of great significance to develop a new type of heating furnace lining structure to ensure that the heating furnace can operate long-term, stably and efficiently.
[0003] The existing lining of the convection chamber adopts a castable structure, the material density is too large, the load bearing capacity of the anchor nail of the furnace wall is limited, and the thickness of the lining can only be 150-200mm, which leads to the prominent over-temperature phenomenon of the outer wall of the high temperature section of the convection chamber, resulting in the increase of heat loss. In order to meet the load bearing requirement, the existing lining of the furnace bottom adopts a castable and refractory brick structure, the material has a large thermal conductivity coefficient, which often causes the outer wall temperature of the furnace bottom to exceed 90-100℃, resulting in large heat loss and easy scalding of the operator. UTILITY MODEL CONTENT
[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide a new type of heating furnace lining structure, set different linings and fixing modes for different parts of the heating furnace, reduce the temperature of the outer wall of the furnace body, and enhance the heat preservation and insulation effect of the heating furnace.
[0005] The utility model adopts the technical scheme that the new type of heating furnace lining structure comprises a convection chamber lining, a radiation chamber lining and a furnace bottom lining, the convection chamber lining and the radiation chamber lining are arranged on the inner wall of the heating furnace, and the furnace bottom lining is arranged at the bottom of the heating furnace.
[0006] Preferably, the support structure is a multilayer grid, and adjacent two layers of grids are arranged in a staggered manner.
[0007] Preferably, the convection chamber lining comprises a tortoise shell net, a first anchor nail, a first refractory layer and a second refractory layer, the tortoise shell net is connected with the inner wall of the heating furnace, the first refractory layer is arranged in the tortoise shell net, the second refractory layer is arranged on the inner side of the first refractory layer, the first anchor nail is arranged on the side of the tortoise shell net away from the inner wall of the heating furnace, and is arranged in the second refractory layer.
[0008] Preferably, the first anchoring nail has at least two inclined portions away from one end of the tortoise shell net.
[0009] Preferably, a protective layer is arranged between the first heat insulation layer and the second heat insulation layer.
[0010] Preferably, the first heat insulation layer has a thickness of 100 mm, the second heat insulation layer has a thickness of 120 mm, and the third heat insulation layer has a thickness of 80 mm.
[0011] Preferably, the first fire-resistant layer has a thickness of 70 mm.
[0012] Preferably, the second fire-resistant layer has a thickness of 80 mm.
[0013] Preferably, the radiation chamber lining comprises a layer of anti-corrosion steel plate paint sprayed on the inner wall of the heating furnace, and a fibrous module layer and a fiber curing paint layer arranged in sequence on the inner side of the layer of anti-corrosion steel plate paint, and the fibrous module layer is connected with the inner wall of the heating furnace through the second anchoring nail.
[0014] Preferably, the radiation chamber furnace wall lining has a thickness of 200 mm.
[0015] Compared with the prior art, the technical scheme has the beneficial effects that:
[0016] The novel heating furnace lining structure of the utility model adopts different linings arranged at different positions of the heating furnace, including a convection chamber lining, a radiation chamber lining and a furnace bottom lining, wherein the furnace bottom lining is provided with a first heat insulation layer, a second heat insulation layer and a third heat insulation layer, the first heat insulation layer comprises a support structure and a ceramic fibrous module arranged in the support structure, the second heat insulation layer is a refractory cast material, and the third heat insulation layer is a refractory brick, which not only retains the strength requirement of the lining structure, reduces the thermal conductivity and reduces heat loss, and the furnace bottom lining is provided with a good support system, which provides convenience for later inspection and maintenance and provides guarantee for long-term stable operation and prevents collapse caused by thermal cracks in the lining material. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the novel heating furnace lining structure of the utility model.
[0018] Figure 2 It is a main view of the convection chamber lining structure.
[0019] Figure 3 It is a welding schematic view of the convection chamber tortoise shell net and the first anchoring nail.
[0020] Figure 4 It is a main view of the furnace bottom lining structure of the heating furnace.
[0021] Figure 5 It is a staggered grid schematic view of the first heat insulation layer of the furnace bottom.
[0022] Wherein: 1, the convection chamber lining 2, the radiation chamber lining 3, the furnace bottom lining 4, the heating furnace inner wall 5, the tortoise shell net 6, the first refractory layer 7, the second refractory layer 8, the first anchor nail 9, the welding spot 10, the third insulation layer 11, the second insulation layer 12, the first insulation layer 13, the grid. DETAILED DESCRIPTION
[0023] Figures 1-5 It is the best embodiment of the utility model, the following will be combined with the drawings of the utility model Figures 1-5 Further illustrate the utility model.
[0024] Referring to Figure 1 The novel heating furnace lining structure includes the convection chamber lining 1, the radiation chamber lining 2 and the furnace bottom lining 3, the convection chamber lining 1 and the radiation chamber lining 2 are arranged on the heating furnace inner wall 4, and the furnace bottom lining 3 is arranged on the heating furnace bottom, the convection chamber lining 1 includes the tortoise shell net 5, the first refractory layer 6 arranged in the tortoise shell net 5 and the second refractory layer 7 arranged on the upside of the first refractory layer 6; the furnace bottom lining 3 includes the first insulation layer 12, the second insulation layer 11 and the third insulation layer 10 arranged in sequence from bottom to top.
[0025] Referring to Figures 2-3 The convection chamber lining 1 includes the tortoise shell net 5, the first refractory layer 6 arranged in the tortoise shell net 5 and the second refractory layer 7 arranged on the upside of the first refractory layer 6, the tortoise shell net 5 is weldedly connected with the heating furnace inner wall 4, the welding spot 9 is the connecting place of adjacent tortoise shell nets 5, the inside filled with the refractory fiber spraying layer with smaller thermal conductivity is the first refractory layer 6, and overtemperature of the furnace wall is effectively prevented.
[0026] The end of the first anchor nail 8 away from the tortoise shell net 5 has at least two inclined portions, is a Y-shaped anchor nail, is welded on the side of the tortoise shell net 5 away from the heating furnace inner wall 4, is firmly welded on the tortoise shell net 5 through the welding with full meat and without biting meat phenomenon, and the side of the first anchor nail 8 is filled with the heavy refractory spraying material and is the second refractory layer 7, the flue gas flow speed in the convection chamber is faster, and the flue gas temperature is higher, therefore, the side of the first anchor nail 8 is filled with the heavy spraying material layer, and corrosion caused by scouring is effectively prevented.
[0027] The thickness of the first refractory layer 6 is 70mm, and the thickness of the second refractory layer 7 is 80mm.
[0028] Referring to Figures 4-5 The furnace bottom lining 3 is provided with three layers, which are the first insulation layer 12, the second insulation layer 11 and the third insulation layer 10 arranged in sequence from bottom to top, the thickness of the first insulation layer 12 is 100mm, the thickness of the second insulation layer 11 is 120mm, and the thickness of the third insulation layer 10 is 80mm.
[0029] The first heat insulation layer 12 comprises a support structure and ceramic fiber modules arranged in the support structure, in the embodiment, the support structure is a plurality of layers of grids 13, two adjacent layers of grids 13 are arranged staggeredly, the grid 13 is connected to the inner side of the inner wall 4 of the heating furnace, and the ceramic fiber modules are arranged in the grid 13.
[0030] The protection layer arranged between the first heat insulation layer 12 and the second heat insulation layer 11 is a hydrophobic ceramic fiber hard board, which prevents the fiber modules of the first heat insulation layer 12 from being polluted and damaged when the refractory castable is laid.
[0031] The second heat insulation layer 11 is located between the first heat insulation layer 12 and the third heat insulation layer 10, needs to support the third heat insulation layer 10, and needs to meet certain heat resistance to prevent high-temperature deformation, so the second heat insulation layer 11 is filled with the refractory castable.
[0032] The third heat insulation layer 10 is designed to be farthest from the furnace bottom and closest to the nozzle, and in view of the actual requirement that the heating furnace needs to be regularly overhauled and maintained, the layer not only needs to have excellent heat resistance, but also needs to have sufficient material strength. Therefore, the refractory brick is selected as the lining material of the third heat insulation layer 10.
[0033] The radiation chamber lining 2 comprises, from outside to inside, anticorrosive steel plate paint sprayed on the inner side of the inner wall 4 of the heating furnace, fiberization modules and fiber curing paint, the fiberization modules are connected to the inner wall 4 of the heating furnace through the second anchor nail, and the thickness of the radiation chamber lining 2 is 200 mm.
[0034] Different lining structures are arranged at different positions of the heating furnace, cost is saved, and heat efficiency reduction caused by heat dissipation is effectively reduced. The furnace bottom lining 3 is provided with a good support system, which provides guarantee for later overhauling and maintenance and long-term stable operation, and prevents collapse caused by thermal cracks of the lining material. The convection chamber lining 1 adopts a new structure that the tortoise shell net 5 is welded with the first anchor nail 8, the strength requirement of the lining structure is retained, the thermal conductivity coefficient is reduced, and heat loss is reduced.
[0035] 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 into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still falls within the protection scope of the technical scheme of the present application.
Claims
1. A novel heating furnace lining structure, characterized in that: It includes a convection chamber lining (1), a radiation chamber lining (2) and a furnace bottom lining (3). The convection chamber lining (1) and the radiation chamber lining (2) are installed on the inner wall (4) of the heating furnace, and the furnace bottom lining (3) is installed at the bottom of the heating furnace. The furnace bottom lining (3) includes a first heat insulation layer (12), a second heat insulation layer (11) and a third heat insulation layer (10) arranged sequentially from bottom to top. The first heat insulation layer (12) includes a support structure and a ceramic fiber module arranged in the support structure. The second heat insulation layer (11) is a refractory casting material and the third heat insulation layer (10) is a refractory brick.
2. The novel heating furnace lining structure according to claim 1, characterized in that: The supporting structure is a multi-layer grid (13), with adjacent grid layers (13) staggered.
3. The novel heating furnace lining structure according to claim 1, characterized in that: A protective layer is provided between the first insulation layer (12) and the second insulation layer (11).
4. The novel heating furnace lining structure according to claim 1, characterized in that: The first insulation layer (12) has a thickness of 100 mm, the second insulation layer (11) has a thickness of 120 mm, and the third insulation layer (10) has a thickness of 80 mm.
5. The novel heating furnace lining structure according to claim 1, characterized in that: The convection chamber lining (1) includes a hexagonal mesh (5), a first anchoring nail (8), a first refractory layer (6), and a second refractory layer (7). The hexagonal mesh (5) is connected to the inner wall (4) of the heating furnace. The first refractory layer (6) is disposed in the hexagonal mesh (5). The second refractory layer (7) is disposed on the inner side of the first refractory layer (6). The first anchoring nail (8) is disposed on the side of the hexagonal mesh (5) away from the inner wall (4) of the heating furnace and is disposed in the second refractory layer (7).
6. The novel heating furnace lining structure according to claim 5, characterized in that: The first anchor (8) has at least two inclined portions at the end away from the tortoise shell mesh (5).
7. The novel heating furnace lining structure according to claim 5, characterized in that: The thickness of the first refractory layer (6) is 70 mm.
8. A novel heating furnace lining structure according to claim 5, characterized in that: The second refractory layer (7) has a thickness of 80 mm.
9. The novel heating furnace lining structure according to claim 1, characterized in that: The radiation chamber lining (2) includes a corrosion-resistant steel plate coating layer sprayed on the inner wall of the heating furnace and a fiberized module layer and a fiber-cured coating layer arranged sequentially inside the corrosion-resistant steel plate coating layer. The fiberized module layer is connected to the inner wall of the heating furnace (4) by a second anchoring nail.
10. A novel heating furnace lining structure according to claim 1, characterized in that: The thickness of the radiation chamber lining (2) is 200 mm.