Recyclable coke oven wall modular heat preservation device and using method thereof
The reusable modular insulation device for coke oven walls addresses the inefficiencies of conventional insulation by using composite modules with refractory fiber and nanofiber boards, ensuring stable temperatures and reducing waste, thus enhancing maintenance efficiency and environmental sustainability.
Patent Information
- Application Number
- CN202411133597.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2024-12-27
AI Technical Summary
Conventional coke oven wall insulation methods, such as using refractory fiber blankets, suffer from poor durability, high thermal conductivity, and resource wastage, leading to increased costs and environmental pollution during hot repairs, and inadequate insulation results in damage to the furnace wall and reduced production efficiency.
A reusable modular thermal insulation device for coke oven walls composed of composite insulation modules with refractory fiber blankets, nanofiber boards, and telescopic rods with wheels, connected by socket members, providing a stable and efficient insulation system that can be easily assembled and disassembled.
The device offers improved thermal insulation, reduces energy consumption, minimizes resource waste, and enhances the working environment by maintaining stable temperatures during maintenance, thereby increasing production efficiency and reducing environmental impact.
Smart Images
Figure CN119193174A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of coke oven maintenance, and in particular relates to a reusable modular heat-insulating device for a coke oven wall and a use method thereof. Background Art
[0002] In the long-term production process of coke ovens, the coke oven body is easily damaged due to the long-term high temperature, mechanical wear caused by coal loading and pushing coke, rapid temperature changes, chemical erosion such as coal gas and tar, and improper operation during the production process. Damage to the coke oven body will lead to reduced coke oven production efficiency, reduced coke quality, increased energy consumption and aggravated environmental pollution. At present, many coke ovens in service are facing the problem of damage or even collapse of the carbonization chamber wall, so they need to be hot repaired. The hot repair of the coke oven carbonization chamber wall is to repair or rebuild the damaged parts at a temperature slightly lower than the normal production temperature of the coke oven (1000℃). The hot repair of the carbonization chamber wall of the domestic coke oven is generally carried out under the normal production state of other carbonization chambers that do not need to be repaired. Therefore, the key to the entire hot repair is to insulate the furnace wall of the adjacent combustion chamber of the repair carbonization chamber to reduce the heat loss of the combustion chamber furnace wall and ensure that the furnace wall that does not need to be repaired will not be damaged due to too low temperature. At the same time, it can ensure that the temperature of the hot repair space is suitable for operation. Conventional furnace wall insulation generally uses refractory fiber blankets (patent number CN104498059.B), which have a general insulation effect and the temperature of the working space is still high. Moreover, after the refractory fiber blanket has been working close to the furnace wall for a long time, the hot surface of the refractory fiber blanket is easy to pulverize, resulting in an increase in thermal conductivity and a weakening of the insulation effect. According to the thermal repair environment and the properties of the coke oven masonry, if the insulation effect cannot be guaranteed, it will not only easily cause local expansion and even damage to the newly built furnace wall, but also make the environmental conditions in the coke oven thermal repair area worse, affecting the working efficiency. The refractory fiber blanket with low reuse rate will also increase costs and cause resource waste.
[0003] Therefore, the known coke oven thermal repair method has the above-mentioned inconveniences and problems. Summary of the invention
[0004] The purpose of the present invention is to provide a reusable modular thermal insulation device for a coke oven wall.
[0005] Another object of the present invention is to provide a method for using a reusable modular thermal insulation device for a coke oven wall.
[0006] To achieve the above purpose, the technical solution of the present invention is: A reusable modular thermal insulation device for a coke oven wall, comprising a plurality of thermal insulation device units, characterized in that: Each of the insulation device units is provided with a plurality of insulation device modules and telescopic rods with wheels, each insulation device module is provided with a composite insulation module, a fixed frame and a socket component, each insulation device unit is provided with 2-4 telescopic rods with wheels, the telescopic direction of the telescopic rod is the thickness direction of the insulation device unit, and the connection method between the telescopic rod and the insulation device unit is a socket connection or a bolt connection; the insulation device module is provided with socket components around it, and the insulation device modules are connected with the socket components.
[0007] The reusable modular thermal insulation device for the coke oven wall of the present invention can be further implemented by adopting the following technical measures.
[0008] The aforementioned reusable coke oven wall modular insulation device, wherein the socket member is made of heat-resistant stainless steel or cast iron.
[0009] The aforementioned reusable coke oven wall modular insulation device, wherein the composite insulation module is provided with an inner layer of refractory fiber blanket, a middle layer of nanofiber board, and an outer layer of refractory fiber blanket.
[0010] The aforementioned reusable coke oven wall modular insulation device, wherein the inner layer refractory fiber blanket and the middle layer nanofiber board are bonded with an adhesive; the middle layer nanofiber board and the outer layer refractory fiber blanket are bonded with an adhesive.
[0011] The aforementioned reusable coke oven wall modular insulation device, wherein the binder is aluminum dihydrogen phosphate or water glass.
[0012] The aforementioned reusable coke oven wall modular insulation device, wherein the thickness of the composite insulation module does not exceed 60 mm.
[0013] The aforementioned reusable coke oven wall modular insulation device, wherein the thickness of the inner layer refractory fiber blanket and the outer layer refractory fiber blanket is 25 mm, and the thickness of the middle layer nanofiber board is 10 mm.
[0014] The aforementioned reusable modular insulation device for coke oven walls, wherein the fixed frame is a mesh structure with anchoring nails, and the fixed frame fixes the composite insulation module in such a way that the anchoring nails penetrate into the outer refractory fiber blanket.
[0015] The aforementioned reusable modular insulation device for coke oven wall, wherein the insulation device module has a length of 1m, a width of 1m, and a thickness of ≤60mm, or a length of 2m, a width of 2m, and a thickness of ≤60mm.
[0016] The aforementioned reusable modular thermal insulation device for the coke oven wall, wherein the telescopic rod is telescopic in a manner that it shortens inwards when there is pressure and automatically returns to its original length when there is no pressure.
[0017] A method for using a reusable modular thermal insulation device for a coke oven wall, characterized by comprising the following steps: a. When the temperature of the repaired part drops to 700~800℃, open the furnace door; b. Place a heat preservation device module at the furnace mouth and splice it upwards to the required height. During the splicing process, install the telescopic rod with wheels to form a heat preservation device unit; c. Push the heat preservation device unit in step b) into the furnace until there is space at the furnace mouth for placing the second heat preservation device unit; d. Repeat step b), and at the same time connect the spliced thermal insulation device unit with the thermal insulation device unit in step b) using a socket member.
[0018] e. Repeat steps b) to d) until the size of the assembled insulation device meets the maintenance requirements; f. After the maintenance work is completed, the insulation device is pushed out and separated into individual insulation device units, individual insulation device modules and telescopic rods with wheels.
[0019] After adopting the above technical solution, the reusable coke oven wall modular insulation device and the use method of the present invention have the following advantages: 1. The composite thermal insulation module is fixed with anchor nails, which has a simple fixing method and is easy to manufacture; 2. The insulation device module is light and easy to transport; 3. The telescopic rod with wheels facilitates the pushing of the heat preservation device into the furnace, and at the same time ensures that the heat preservation device unit is not easy to tip over, so that the heat preservation device unit pushed into the furnace has stability; 4. After repeated use, there is no need to replace the entire insulation device. You only need to replace the insulation device module or even the inner refractory fiber blanket of the insulation device module as needed; 5. It has good thermal insulation effect, which saves energy and improves the maintenance working environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of a heat preservation device unit after installation according to an embodiment of the present invention; Figure 2 A schematic diagram of a single heat preservation device unit according to an embodiment of the present invention; Figure 3 A schematic diagram of modular connection of a single heat preservation device according to an embodiment of the present invention; Figure 4 Another modular connection schematic diagram of a single heat preservation device according to an embodiment of the present invention; Figure 5 A schematic diagram of a telescopic rod with wheels according to an embodiment of the present invention; Figure 6Schematic diagram of the temperature change in the working space after the nanofiber board is used; Figure 7 Schematic diagram of the temperature change in the working space without the use of nanofiber boards.
[0021] In the figure: 1 furnace wall, 2 single insulation device unit, 21 single insulation device module, 211 socket member, 212 composite insulation module, 213 fixed frame, 214 socket connected to the telescopic rod, refractory fiber blanket 31, 311 inner layer refractory fiber blanket, 312 middle layer nanofiber board, 313 outer layer refractory fiber blanket, 22 telescopic rod with wheels, 221 telescopic rod, 222 wheels. DETAILED DESCRIPTION
[0022] The present invention is further described below in conjunction with embodiments and accompanying drawings.
[0023] Example 1 Please refer to Figure 1-Figure 5 The reusable modular insulation device for the wall of a coke oven of the present invention is composed of several insulation device units spliced together, and a single insulation device unit 2 is composed of several insulation device modules 21 and a telescopic rod 22 with wheels. A single insulation device module 21 is composed of a composite insulation module 212, a fixed frame 213 and a socket member 211. Each insulation device unit 2 is provided with three telescopic rods 22 with wheels. The telescopic direction of the telescopic rod 22 is the thickness direction of the insulation device unit 2. The telescopic rod 22 is connected to the insulation device unit 2 by a socket 214. There are socket members 211 around the insulation device module 21. The insulation device modules 21 are connected by socket members 211. The material of the socket member 211 includes but is not limited to heat-resistant stainless steel. The composite insulation module 212 of the insulation device module 21 is composed of an inner layer of refractory fiber blanket 311, an intermediate layer of nanofiber board 312, and an outer layer of refractory fiber blanket 313. The inner refractory fiber blanket 311 and the middle layer nanofiber board 312, and the middle layer nanofiber board 312 and the outer refractory fiber blanket 313 are bonded with an adhesive. The adhesive is water glass. The thickness of the composite insulation module 212 of the insulation device module 21 is 60 mm. The fixed frame of the insulation device module 21 is a mesh structure with anchoring nails. The fixed frame of the insulation device module 21 fixes the composite insulation module 212 in such a way that the anchoring nails penetrate into the outer refractory fiber blanket 313. The dimensions of the insulation device module 21 are length × width × thickness of 2 m × 2 m × ≤ 60 mm.
[0024] Example 2 Now please combine Figure 1 and Figure 6 The method for using the reusable modular thermal insulation device for the coke oven wall of the present invention is further described: 1) When the temperature of the maintenance part drops to 700-800℃, open the furnace door; 2) placing a heat preservation device module 21 at the furnace mouth and splicing them upwards to the required height, installing the telescopic rod 221 with wheels 222 during the splicing process to form a heat preservation device unit 2; 3) Use a tool to push the heat preservation device unit 2 in step 2) into the furnace until there is space at the furnace mouth for placing a second heat preservation device unit 2; 4) Repeat step 2) and connect the spliced heat preservation device unit 2 with the heat preservation device unit 2 in step 2) by using a socket member 211.
[0025] 5) Repeat steps 2) to 4) until the size of the assembled insulation device meets the maintenance requirements; At this time, due to the low thermal conductivity of the nanofiber board, the left combustion chamber wall is insulated and heat-insulating state, and the heat transfer from the combustion chamber wall to the carbonization chamber will gradually decrease until the temperature of the carbonization chamber meets the maintenance work requirements and then the maintenance work can be carried out.
[0026] 6) After the maintenance work is completed, the heat preservation device is pushed out and disassembled into each heat preservation device unit 2 , each heat preservation device module 21 and the telescopic rod 221 with wheels 222 .
[0027] Comparative Example 1 Please refer to Figure 6 and Figure 7 The insulation effect of the reusable modular insulation device for the coke oven wall of the present invention with and without the addition of nanofiber boards is further explained.
[0028] Figure 6 This is a schematic diagram of the temperature change in the working space after the use of nanofiber board, wherein the thermal conductivity of the middle layer nanofiber board is 0.032 W / (m·K) at 800°C, 0.028 W / (m·K) at 600°C, 0.025 W / (m·K) at 400°C, and 0.021 W / (m·K) at 200°C.
[0029] Figure 7 This is a schematic diagram of the temperature change in the working space without the use of nanofiber board, where the thermal conductivity of the refractory fiber blanket is approximately 0.5 W / (m·K) at 800°C, 0.152~0.210 W / (m·K) at 600°C, 0.085-0.120 W / (m·K) at 400°C, and 0.045-0.070 W / (m·K) at 200°C.
[0030] Under the same premise that the thickness of the insulation device module is 60mm, when the temperature of the part to be inspected is reduced to 700-800℃, the surface temperature of the refractory fiber blanket in the carbonization chamber with the nanofiber board 312 added is about 97.8℃, while the surface temperature of the refractory fiber blanket in the carbonization chamber with only the refractory fiber blanket 31 is about 190℃, and the cooling effect in the carbonization chamber is obvious.
[0031] The above embodiments are only for the purpose of illustrating the present invention, but not for limiting the present invention. A person skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.
Claims
1. A reusable modular thermal insulation device for a coke oven wall, comprising a plurality of thermal insulation device units, characterized in that: Each of the insulation device units is provided with a plurality of insulation device modules and telescopic rods with wheels, each insulation device module is provided with a composite insulation module, a fixed frame and a socket component, each insulation device unit is provided with 2-4 telescopic rods with wheels, the telescopic direction of the telescopic rod is the thickness direction of the insulation device unit, and the connection method between the telescopic rod and the insulation device unit is a socket connection or a bolt connection; the insulation device module is provided with socket components around it, and the insulation device modules are connected with the socket components.
2. The reusable modular thermal insulation device for coke oven wall according to claim 1, characterized in that: The socket member is made of heat-resistant stainless steel or cast iron.
3. The reusable modular thermal insulation device for coke oven wall according to claim 1, characterized in that: The composite heat-insulating module is provided with an inner layer of refractory fiber blanket, a middle layer of nanofiber board, and an outer layer of refractory fiber blanket.
4. The reusable modular thermal insulation device for coke oven wall according to claim 3, characterized in that: The inner layer refractory fiber blanket and the middle layer nanofiber board are bonded with an adhesive; the middle layer nanofiber board and the outer layer refractory fiber blanket are bonded with an adhesive.
5. The reusable modular thermal insulation device for coke oven wall according to claim 4, characterized in that: The binder is aluminum dihydrogen phosphate or water glass.
6. The reusable modular thermal insulation device for coke oven wall according to claim 1, characterized in that: The thickness of the composite thermal insulation module does not exceed 60 mm.
7. The reusable modular thermal insulation device for coke oven wall according to claim 1, characterized in that: The fixing frame is a mesh structure with anchoring nails, and the fixing frame fixes the composite thermal insulation module in a manner that the anchoring nails penetrate into the outer refractory fiber blanket.
8. The reusable modular thermal insulation device for coke oven wall according to claim 1, characterized in that: The module size of the heat preservation device is 1m in length, 1m in width, and ≤60mm in thickness, or 2m in length, 2m in width, and ≤60mm in thickness.
9. The reusable modular thermal insulation device for coke oven wall according to claim 1, characterized in that: The telescopic rod is retracted in such a way that it shortens inwards when there is pressure and automatically returns to its original length when there is no pressure.
10. A method for using the reusable modular thermal insulation device for coke oven walls as claimed in claim 1, characterized in that The following steps are involved: a. When the temperature of the repaired part drops to 700-800℃, open the furnace door; b. Place a heat preservation device module at the furnace mouth and splice it upwards to the required height. During the splicing process, install the telescopic rod with wheels to form a heat preservation device unit; c. Push the heat preservation device unit in step b) into the furnace until there is space at the furnace mouth for placing the second heat preservation device unit; d. Repeat step b), and simultaneously connect the spliced heat preservation device unit with the heat preservation device unit in step b) by using a socket member; e. Repeat steps b) to d) until the size of the assembled insulation device meets the maintenance requirements; f. After the maintenance work is completed, the insulation device is pushed out and separated into individual insulation device units, individual insulation device modules and telescopic rods with wheels.