CN218665895U - Furnace door composite lining and coke oven - Google Patents

Abstract

The utility model discloses a furnace gate composite lining and coke oven, furnace gate composite lining include fibrous layer, fibre module and pour the material, and the fibrous layer laminating is in the face of meeting a fire of furnace gate, and the fibrous module is laid in the fibrous layer and is kept away from one side of furnace gate, pours the material and forms in the periphery of fibrous module. The fiber layer and the fiber module have good sealing performance and small heat conductivity coefficient, can reduce heat dissipation loss, and have good thermal shock resistance. The furnace door composite lining of the utility model has better heat insulation, sealing performance and thermal shock resistance stability.

Description

Furnace door composite lining and coke oven

Technical Field

The utility model relates to the technical field of coke ovens, in particular to a composite lining of an oven door. The utility model also relates to a coke oven.

Background

With the wide concern of energy conservation and consumption reduction in the coking industry in China, the clean heat recovery coke oven is rapidly developed. Among various types of coke ovens, clean coke ovens are gradually replacing other types of coke ovens to become the main oven type of the coke oven industry due to the advantages of good working condition, wide raw material coal blending surface, less coking coal consumption, low pollutant discharge and the like.

According to the report of the integral heat dissipation loss of the coke oven by the Annage Steel group iron and Steel institute, the heat loss of the coke oven door can reach 3.48 percent, and the heat preservation effect of the coke oven door is a key factor influencing the coke quality. The working system of the clean heat recovery coke oven has the following characteristics: 1. the coke pushing and discharging are required repeatedly in the coking process, and the temperature born by the furnace door fluctuates sharply between 30 ℃ and 1200 ℃. The characteristic requires that the furnace door lining has excellent thermal shock resistance and can resist the internal stress caused by huge temperature difference. 2. The components of the furnace gas are complex and are mixed with impurities such as coal tar, carbon powder, graphite and the like. This feature requires the oven door liner to have excellent erosion resistance and to resist erosion and wear from complex environments. 3. Coke oven chambers are operated at slightly negative pressures and require tight control of air supply to reduce the burn rate. This feature requires the oven door liner to maintain excellent sealing properties and to effectively prevent air from leaking into the carbonization chamber.

The early coking furnace door mainly uses the traditional clay brick, the material has low cost and high strength, but the heat conductivity coefficient close to 1.28W/m.K causes the heat preservation effect to be poor, the thermal expansion is obvious when the temperature is raised, and the coking furnace door is easy to crack and destroy under the erosion and abrasion of furnace gas.

In recent years, with the development of refractory materials, a plurality of new refractory materials are emerging, and researchers begin to adopt a structure form of combining a ceramic fiber board and a monolithic refractory castable material. The investigation on several domestic implementation cases shows that: 1. the lining structure has large volume density and high heat conductivity coefficient, which causes large integral weight of the furnace door and inconvenient operation. 2. Still have heat dissipation loss great, the energy consumes seriously, outer wall temperature is too high, influence operational environment scheduling problem. 3. The thermal shock resistance of the furnace lining material is poor, cracks are easy to generate in use, the overall service performance of the castable heat-insulating lining can be affected by local damage, the service life is short, and the overall production and operation cost of users is high. 4. The heat-insulating lining adopting the casting material structure has the advantages that after the casting of the lining on site is finished, a drying procedure of a baking furnace is needed, the construction period is long, the technical requirement of the baking furnace is high, and the installation and construction are inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a furnace gate composite lining has better heat-proof quality, leakproofness and thermal shock resistance stability. The utility model also provides a coke oven.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a furnace gate composite lining, is applied to the furnace gate of kiln, includes fibrous layer, fibre module and pours the material, the fibrous layer laminating fit in the face of a fire of furnace gate, the fibre module is laid the fibrous layer is kept away from one side of furnace gate, it forms in to pour the material the periphery of fibre module.

Optionally, the furnace door further comprises an anchoring member fixedly connected with the furnace door, the anchoring member penetrates through the fiber layer, and the fiber module is fixedly connected with the anchoring member.

Optionally, a plurality of the fiber modules are included, each of the fiber modules being arranged in an array, and the expansion direction of each of the fiber modules being either in a row direction or in a column direction.

Optionally, the fiber module expansion device comprises a plurality of fiber modules, the fiber modules are spliced with each other, and a gap for expanding the fiber modules is arranged between two adjacent fiber modules along the expansion direction of the fiber modules.

Optionally, if the casting material adjacent to the fiber module is located in an expansion direction of the fiber module, a gap for expanding the fiber module is provided between the casting material and the fiber module.

Optionally, a compressible flexible insulating strip is disposed within the gap.

Optionally, the soft heat insulation strip is fixedly connected with the fiber module through a U-shaped nail or a high-temperature adhesive.

Optionally, a fire protection layer is provided on the fire-facing side of the fibre module.

Optionally, the furnace door structure further comprises a Y-shaped nail fixedly connected with the furnace door, and the casting material is fixed through the Y-shaped nail.

The coke oven comprises an oven door and a composite lining arranged on the inner side of the oven door, wherein the composite lining comprises the oven door composite lining.

According to the above technical scheme, the utility model provides a furnace gate composite lining is applied to the furnace gate of kiln, including fibrous layer, fibre module and pour the material, the fibrous layer laminating is in the face of a fire of furnace gate, and the fibre module is laid in the fibrous layer and is kept away from one side of furnace gate, pours the material and is formed at the periphery of fibre module. The fiber layer and the fiber module have good sealing performance and small heat conductivity coefficient, can reduce heat dissipation loss, and have good thermal shock resistance. Therefore, the furnace door composite lining of the utility model has better heat insulation, sealing performance and thermal shock resistance stability.

The utility model also provides a coke oven, which can achieve the beneficial effects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a partial structure of a composite lining for an oven door according to an embodiment of the present invention;

fig. 2 is a transverse cross-sectional view of a composite lining of an oven door according to an embodiment of the present invention;

fig. 3 is a longitudinal sectional view of a composite lining for an oven door according to an embodiment of the present invention;

reference numerals in the drawings of the specification include:

1-furnace door, 2-fiber layer, 3-fiber module, 4-casting material, 5-fire-resistant protective layer, 6-soft heat insulation strip, 7-U-shaped nail, 8-Y-shaped nail and 9-anchoring piece.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

The embodiment provides a composite lining of furnace door, is applied to the furnace door of kiln, including fibrous layer, fibre module and pouring material, the fibrous layer laminating in the head-on face of furnace door, the fibre module is laid the fibrous layer is kept away from one side of furnace door, pouring material form in the periphery of fibre module.

The fibrous layer is a layered structure formed by fibers, i.e. a layered structure formed by continuous or discontinuous filaments. A fiber module is a block structure formed by fibers, i.e. a block structure formed by continuous or discontinuous filaments. All adopt inorganic fiber, fibrous layer and fibre module have better leakproofness to coefficient of heat conductivity is little, can reduce the heat dissipation loss, has better heat-proof quality, and has better thermal shock resistance stability. Therefore, the composite lining of the furnace door has better heat insulation, sealing performance and thermal shock resistance.

The fiber layer is attached to the fire-facing surface of the furnace door, and the furnace door can be leveled through the fiber layer, so that the fiber module can be laid conveniently. The fibrous layer may be a fibrous blanket including, but not limited to, a ceramic fibrous blanket or a zirconium-containing fibrous blanket. In practical application, fiber blankets with corresponding standards can be selected according to the temperature of the coke oven, such as fiber blankets with different refractories, e.g., type 1260 standard fiber blanket, type 1400 zirconium-containing fiber blanket, etc.

The fiber modules can be laid on one side of the fiber layer far away from the furnace door in an array form, and the fiber modules are spliced with each other. In this embodiment, the shape, size, and number of the fiber modules are not limited, as long as a plurality of fiber modules can be spliced with each other to form a thermal insulation layer, and the fiber modules can be arranged according to the shape and size of the oven door in practical application. Alternatively, the fiber module may be in a shape of a rectangular parallelepiped, a cube, or the like, which is convenient for splicing. The fiber module may be, but is not limited to, a ceramic fiber module or a zirconium-containing fiber module. In practical application, the fiber module with corresponding refractoriness can be selected according to the temperature of the coke oven. For example, the fiber module may be selected from a type 1400 zirconium-containing fiber module based on the oven temperature.

Referring to fig. 1, 2 and 3 by way of example, fig. 1 is a schematic partial structure view of an oven door composite liner provided in an embodiment, fig. 2 is a transverse sectional view of an oven door composite liner provided in an embodiment, and fig. 3 is a longitudinal sectional view of an oven door composite liner provided in an embodiment. As shown in the figure, the composite lining of the furnace door comprises a fiber layer 2, fiber modules 3 and pouring materials 4, wherein the fiber layer 2 is tightly attached to the fire-facing surface of the furnace door 1, each fiber module 3 is laid on one side of the fiber layer 2, which is far away from the furnace door 1, and the pouring materials 4 are formed on one side of the fiber layer 2, which is far away from the furnace door 1, and are positioned on the periphery of the fiber modules 3. As shown in fig. 2, the potting material 4 is provided on the left and right sides of the aligned fiber modules 3, respectively, and the potting material 4 is provided on the upper and lower sides of the aligned fiber modules 3, respectively.

The composite lining of the oven door may comprise a plurality of fiber modules 3, each fiber module 3 being arranged in an array, and the expansion direction of each fiber module 3 may be along the row direction or along the column direction, and the fiber modules 3 expand when heated, and a certain extension is generated in the expansion direction. Preferably, a plurality of fiber modules 3 are spliced to each other, and a gap for expanding the fiber module 3 is provided between two adjacent fiber modules 3 in the expansion direction of the fiber modules 3. For the fiber modules 3 that arrange, set up the gap between two adjacent fiber module 3 along fiber module 3's the inflation direction, fiber module 3 produces certain extension volume in its inflation direction after being heated, and the gap of reserving between two adjacent fiber module 3 takes place to expand for fiber module 3 and provides redundant space. In this embodiment, the width of the gap is not limited, and the gap may be set according to the expansion of the fiber modules 3 when heated, and the width of the gap may not be too large, and if the gap is too wide, the sealability between the fiber modules 3 may be reduced. Referring to fig. 1 to 3, two rows and two columns of fiber modules 3 are laid, each fiber module 3 is a rectangular parallelepiped, the expansion direction of each fiber module 3 is a vertical direction, and a gap is provided between two adjacent fiber modules 3 in the vertical direction.

Preferably, if the casting material 4 adjacent to the fiber module 3 is located in the expansion direction of the fiber module 3, a gap for expanding the fiber module 3 is provided between the casting material 4 and the fiber module 3, so as to provide a redundant space for the expansion of the fiber module 3. In this embodiment, the width of the gap between the fiber module 3 and the casting material 4 is not limited, and the gap can be set according to the expansion of the fiber module 3 when heated. Referring to fig. 1 to 3, the expansion direction of each fiber module 3 is vertical, and a gap is provided between each fiber module 3 and the casting material 4 adjacent to each other in the vertical direction. In one embodiment, the gap width provided between adjacent fiber modules 3 is 20cm to 40cm, and the gap width provided between the potting compound 4 and the fiber modules 3 is 10cm to 30cm.

Preferably, referring to fig. 1 to 3, a soft heat insulation strip 6 is arranged in a gap between two adjacent fiber modules 3 along the expansion direction of the fiber modules 3, and a soft heat insulation strip 6 is arranged in a gap between the casting material 4 and the fiber modules 3 adjacent along the expansion direction of the fiber modules 3. When the fiber modules 3 are heated and expanded, the soft heat insulation strips 6 in the gaps can be extruded, the soft heat insulation strips 6 increase the sealing performance between the fiber modules 3 or between the fiber modules 3 and the adjacent pouring materials 4, the sealing performance of the composite lining is improved, and the heat insulation effect of the composite lining is enhanced. During construction, the soft heat insulation strips 6 can be compressed and then plugged into the gaps, so that the soft heat insulation strips 6 have a certain compression amount when the fiber modules 3 are not expanded, and a good sealing effect can be achieved when the temperature of the coke oven starts to rise.

In this embodiment, the material of the flexible thermal insulation strip 6 is not limited, and a compressible material with a certain thermal insulation effect can be used, and the material is not limited to a fiber blanket, specifically, an inorganic fiber blanket, such as a ceramic fiber blanket or a zirconium-containing fiber blanket. The soft heat insulation strips 6 can be made of a fiber blanket made of the same material as the fiber module 3, and can fully compensate the shrinkage of the heating wire of the fiber module 3 at high temperature. The flexible heat insulation strip 6 can be in a strip shape, and the length or the width of the flexible heat insulation strip 6 is set according to the size of the coke oven door 1 and the size of the fiber module 3.

Optionally, the soft heat insulating strips 6 and the fiber modules 3 can be fixedly connected through the U-shaped nails, the U-shaped nails are fixed between the left and right adjacent fiber modules 3 along the thickness direction of the soft heat insulating strips 6, the contraction of the soft heat insulating strips 6 in the high-temperature line in the extrusion direction is effectively compensated, and the sealing effect is further improved. Alternatively, the soft heat insulating strips 6 can also be fixedly connected with the fiber module 3 through high-temperature adhesive. Referring to fig. 3, the soft heat insulating strips 6 arranged in the gaps can be fixedly connected with the fiber modules 3 through the staples 7 between the adjacent fiber modules 3, and the soft heat insulating strips 6 in the gaps can be fixed between the casting material 4 and the adjacent fiber modules 3 through the high-temperature adhesive. Refractory alloy staples may be used for staples 7.

Further preferably, a fire-resistant protective layer 5 is arranged on the fire-facing surface of the fiber module 3, the fire-resistant protective layer 5 has the functions of high temperature resistance, cracking resistance and thermal shock resistance, and the fire-resistant protective layer 5 can resist high temperature of more than 1400 ℃ and can be a coating formed by spraying thermal protective paint.

Preferably, the composite lining of the oven door can also comprise an anchoring piece 9 fixedly connected with the oven door 1, the anchoring piece 9 penetrates through the fiber layer 2, and the fiber module 3 is fixedly connected with the anchoring piece 9. The fiber layer 2 and the fiber module 3 are fixedly connected through the anchoring piece 9, one end of the anchoring piece 9 is fixedly connected with the oven door 1, for example, the oven door 1 is a steel plate oven door, and the anchoring piece 9 can be welded to the steel plate of the oven door.

Preferably, the composite lining of the oven door can further comprise Y-shaped nails 8 fixedly connected with the oven door 1, and the casting 4 is fixed through the Y-shaped nails 8. The casting material 4 is constructed in a cast-in-place mode, and before casting, the furnace door 1 is fixedly connected with the Y-shaped nail 8 in advance so as to fix the casting material 4. The Y-shaped nail 8 can be welded on the steel plate of the furnace door, and the Y-shaped nail 8 can be a refractory alloy Y-shaped nail. The casting material 4 is a refractory casting material, and the casting material 4 can be flexibly selected according to the temperature of the coke oven, for example, a refractory casting material with a classification temperature of 1430 is selected.

In a specific example, the fiber layer 2 can be made of a ceramic fiber blanket, which is prepared by mixing a plurality of ceramic fiber production raw materials according to a certain proportion, melting at high temperature, then forming fibers by high-speed centrifugal spinning or blowing at high-speed airflow, needling into a blanket after a series of processes, and then carrying out processes such as heat setting, numerical control cutting and the like. The fiber module 3 is based on the preparation process of the ceramic fiber blanket, and is formed by multilayer tiling, compaction and calcination, and the special process adopted by the fiber module 3 ensures that the fiber module 3 has excellent quality and stable performance, and has the characteristics of flexible and controllable volume density and reduced shrinkage joint in the integral manufacture besides the advantages of the ceramic fiber blanket.

Compared with the traditional furnace door lining, the furnace door composite lining has the following advantages:

from the leakproofness, fibre module 3 adopts the full fibre to finalize the design, and single block fibre module 3 does not have folding seam, and the gap from hot face to cold face reduces after the installation, has adopted soft heat insulating strip 6 between the vertical gap, has avoided the phenomenon of leaking out to a great extent.

From the aspect of heat preservation effect, the fiber layer 2 and the fiber module 3 have small heat conductivity coefficient and uniform heat insulation, the comprehensive heat conductivity coefficient of the energy-saving furnace door lining is less than 0.20W/m.K at the furnace temperature of 800 ℃, and in one embodiment, the temperature of the cold surface of the furnace door is reduced to be about 80 ℃, and the comprehensive heat dissipation loss per square is reduced to be about 520W.

From the service life, the shrinkage of the heating wire of the energy-saving furnace door lining is kept below 1% at 1250 ℃, the energy-saving furnace door lining has no violent deformation, excellent thermal shock resistance, good shape in the temperature fluctuation range from room temperature to 1200 ℃, and no damage or fracture phenomena.

From the construction installation, this energy-conserving furnace gate lining adopts fibre module 3 to build by laying bricks or stones the furnace lining, has greatly reduced the construction degree of difficulty, has simplified the installation procedure, has improved installation efficiency for the construction progress has adopted multiple anchor structural style, and the construction is nimble various, and the back surfacing is leveled, pleasing to the eye after the construction finishes.

The composite lining of the furnace door has the advantages of low comprehensive heat conductivity coefficient, good sealing property, strong thermal shock resistance, corrosion resistance, wind erosion resistance, excellent high-temperature pulverization resistance, long service life, high energy-saving percentage and low outer wall temperature, and can fully adapt to the working characteristics of a coke furnace.

The embodiment also provides a coke oven, which comprises an oven door and a composite lining arranged on the inner side of the oven door, wherein the composite lining comprises the oven door composite lining of any one of the above embodiments.

The coke oven of the embodiment adopts the oven door composite lining which comprises a fiber layer, a fiber module and pouring materials, wherein the fiber layer is attached to the fire-facing surface of the oven door, the fiber module is laid on one side of the fiber layer far away from the oven door, and the pouring materials are formed on the periphery of the fiber module. The fiber layer and the fiber module have good sealing performance and small heat conductivity coefficient, can reduce heat dissipation loss, and have good thermal shock resistance.

The coke oven of the present embodiment can be, but is not limited to, a clean heat recovery coke oven.

The detailed description is provided for the furnace door composite lining and the coke oven provided by the utility model. The principles and embodiments of the present invention have been explained herein using specific examples, and the above description of the embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The utility model provides a furnace gate composite lining, is applied to the furnace gate of kiln, its characterized in that, including fibrous layer, fibre module and pouring material, the fibrous layer laminating in the face of a fire of furnace gate, the fibre module is laid the fibrous layer is kept away from one side of furnace gate, pouring material form in the periphery of fibre module.

2. The oven door composite liner of claim 1, further comprising an anchor fixedly attached to the oven door, the anchor passing through the fiber layer, the fiber module fixedly attached to the anchor.

3. The oven door composite liner according to claim 1, comprising a plurality of the fiber modules, each of the fiber modules being arranged in an array, the expansion direction of each of the fiber modules being either in a row direction or in a column direction.

4. The oven door composite liner according to claim 1, comprising a plurality of the fiber modules, which are spliced to each other, wherein a gap for expansion of the fiber modules is provided between two adjacent fiber modules in an expansion direction of the fiber modules.

5. The oven door composite liner according to claim 1, characterized in that a gap for expansion of the fibre module is provided between the casting and the fibre module if the casting adjacent to the fibre module is in the expansion direction of the fibre module.

6. The oven door composite liner according to claim 4 or 5, characterized in that compressible flexible insulating strips are arranged in the gap.

7. The oven door composite liner according to claim 6, wherein the flexible insulating strips are fixedly connected to the fiber modules by staples or high temperature adhesive.

8. The oven door composite lining according to claim 1, characterized in that a fire protection layer is provided at the fire-facing side of the fibre module.

9. The oven door composite liner according to claim 1, further comprising Y-pins fixedly connected to the oven door, by which the casting is fixed.

10. A coke oven comprising an oven door and a composite liner disposed inside the oven door, the composite liner comprising the oven door composite liner of any one of claims 1 to 9.

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