CN213012940U - Blast furnace hot blast main pipe refractory lining rapid cooling structure - Google Patents
Blast furnace hot blast main pipe refractory lining rapid cooling structure Download PDFInfo
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- CN213012940U CN213012940U CN202021097112.0U CN202021097112U CN213012940U CN 213012940 U CN213012940 U CN 213012940U CN 202021097112 U CN202021097112 U CN 202021097112U CN 213012940 U CN213012940 U CN 213012940U
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Abstract
The utility model discloses a blast furnace hot blast main resistant material inside lining rapid cooling structure, include the cooling blast pipe way of laying and the fan blast pipe way of connecting combustion fan of laying in advance before the blast furnace damping down, cooling blast pipe way one end with fan blast pipe way intercommunication, the cooling blast pipe way other end be used for with the terminal manhole intercommunication of the hot blast main of hot-blast furnace, the front end that hot blast main is close to the blast furnace is through the backflow valve connection flow reversing pipe, be provided with the governing valve on the cooling blast pipe way. The utility model aims at providing a blast furnace hot blast house steward resistant material inside lining rapid cooling structure, rapid cooling shortens maintenance cycle.
Description
Technical Field
The utility model relates to a blast furnace hot blast main pipe refractory lining rapid cooling structure.
Background
The length of a hot blast main pipe of a 4150m3 blast furnace hot blast stove in our factory is 109 m, the normal production of the blast furnace is affected by the burning red deformation of the pipe shell due to the loosening and collapse of the lining refractory material of the main pipe, and the replacement of the hot blast main pipe, the length of a branch pipe, the length of a refractory lining of 84 m and a compensator of a pipeline part are planned to be removed and replaced for 15 days.
In the construction that the hot blast stove body is not overhauled, the cooling method of the old hot blast pipeline is to seal all blast furnace air supply devices at the joints of the elbows by using blind plates after the blast furnace stops blowing down, and open the backflow valve of the hot blast surrounding pipe. And (3) removing the refractory bricks of the pipeline manhole, and opening a plurality of holes at the upper parts of the hot air main pipe and the branch pipe to remove the refractory bricks. A large number of axial flow fans are used for blowing air, and cooling air is discharged from a backflow pipeline. Cooling the refractory lining of the hot air pipeline, and then removing the refractory bricks by personnel entering the pipeline.
The traditional cooling method adopts multipoint construction, and the early-stage labor input and investment are large. The axial flow fan is more, the installation and maintenance are difficult, the cooling is slow (3 days), the cooling amplitude is not controlled, and the maintenance task can not be realized within the specified maintenance time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a blast furnace hot blast house steward resistant material inside lining rapid cooling structure, rapid cooling shortens maintenance cycle.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a blast furnace hot blast main pipe resistant material inside lining rapid cooling structure, includes the cooling supply air duct of laying before the blast furnace damping down and the fan supply air duct of connecting combustion fan who lays in advance, cooling supply air duct one end with fan supply air duct intercommunication, the cooling supply air duct other end be used for with the terminal manhole intercommunication of the hot-blast main pipe of hot-blast furnace, the front end that hot-blast main pipe is close to the blast furnace is connected the flow reversing pipe through the refluence valve, be provided with the governing valve on the cooling supply air duct.
Furthermore, a temperature measuring couple is also arranged on the hot air main pipe.
Furthermore, the regulating valve is a manual butterfly valve.
Compared with the prior art, the utility model discloses a beneficial technological effect:
the structure of the utility model can reduce the temperature in the hot air pipeline from 1068 ℃ to 362 ℃ in 31 hours, and reduce the temperature difference to 738 ℃. The average cooling speed is 22.78 ℃/h, which is 41 hours earlier than the 72 hours of the traditional cooling method.
Drawings
The present invention will be further explained with reference to the following description of the drawings.
FIG. 1 is a schematic structural view of the use state of the refractory lining rapid cooling structure of the blast furnace hot blast main pipe of the present invention;
description of reference numerals: 1. a combustion fan; 2. a fan air supply pipeline; 3. adjusting a valve; 4. a cooling air supply pipeline; 5. a manhole; 6. a hot air main pipe; 7. a temperature measuring couple; 8. an inverted pipe; 9. a surrounding pipe; 10. an air supply branch pipe; 11. closing the plate; 12. a blast furnace; 13. a hot blast stove; 14. and a backflow valve.
Detailed Description
As shown in fig. 1, a blast furnace hot blast main pipe refractory lining rapid cooling structure comprises a cooling blast pipeline 4 laid before a blast furnace 12 stops blowing and a fan blast pipeline 2 laid in advance and connected with a combustion fan 1, wherein one end of the cooling blast pipeline 4 is communicated with the fan blast pipeline 2, the other end of the cooling blast pipeline 4 is communicated with a manhole 5 at the tail end of a hot blast main pipe 6 of a hot blast furnace 13, the front end of the hot blast main pipe 6 close to the blast furnace is connected with a backflow pipe 8 through a backflow valve 14, and the cooling blast pipeline 4 is provided with an adjusting valve 3. And a temperature measuring couple 7 is also arranged on the hot air main pipe 6. The regulating valve 3 is a manual butterfly valve.
In 2019, 9, 16 and 9 months, a blast furnace hot blast stove header pipe of No. 7 4150m3 of the iron works is cooled by a rapid cooling method, and the specific implementation steps are as follows:
1. before the blast furnace 12 stops blowing, a cooling air supply pipeline 4 is laid, and the regulating valve 3 is installed in place.
2. After the blast furnace 12 is shut down, the hot blast furnace 14 is in a stewing state, and a sealing plate of a manhole 5 at the tail end of a hot blast main pipe 6 and refractory bricks are removed. One end of a pre-laid cooling air supply pipeline 4 is communicated with a manhole 5, and the other end of the pre-laid cooling air supply pipeline is communicated with a fan air supply pipeline 2 of a combustion fan 1.
3. The blast furnace 12 side is opened the flow reversing valve 15 and is connected the flow reversing pipe 8, unloads whole belly pipe, and air supply branch pipe 10 installation shrouding 11, installation low temperature galvanic couple 7, combustion-supporting fan 1 begins to blow, and hot-blast through backflow pipeline 8 discharges, reduces hot-blast pipeline refractory temperature.
4. In order to prevent the temperature from being reduced too fast, the backflow pipeline is protected. The opening degree of the regulating valve 3 is fixed by 50% at the initial stage, the outlet pressure of the fan is slowly increased, and the air quantity is controlled to enable the temperature of the backflow pipe to be below 300 ℃. The outlet pressure of the fan is gradually increased, the regulating valve is fully opened, and the temperature is rapidly reduced.
5. And the steel structure of the hot air pipeline is subjected to gas welding and cutting in the cooling process, and the blowing pressure in the hot air pipeline is controlled to be less than 15 Kpa. When the temperature in the hot air main pipe is slowly reduced in the last stage of temperature reduction, the number of the sealing plates of the middle section of the blast furnace side is gradually increased by 11, the area of the air exhaust outlet is increased, and the pressure in the hot air pipeline is adjusted. The blowing flow is increased, and the heat bringing-out is accelerated.
6. And (5) stopping cooling when the temperature reaches the requirement at 9 months, 17 days and 16 days, and performing dismantling operation of the refractory materials from the outside and the inside.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (3)
1. The utility model provides a blast furnace hot blast main refractory lining rapid cooling structure which characterized in that: the blast furnace cooling air supply pipeline comprises a cooling air supply pipeline laid before damping down of the blast furnace and a fan air supply pipeline which is laid in advance and connected with a combustion-supporting fan, wherein one end of the cooling air supply pipeline is communicated with the fan air supply pipeline, the other end of the cooling air supply pipeline is used for being communicated with a manhole at the tail end of a hot air main pipe of a hot air furnace, the front end of the hot air main pipe close to the blast furnace is connected with a backflow pipe through a backflow valve, and the cooling air supply pipeline is provided with an adjusting.
2. The blast furnace hot blast main pipe refractory lining rapid cooling structure according to claim 1, characterized in that: and a temperature measuring couple is also arranged on the hot air main pipe.
3. The blast furnace hot blast main pipe refractory lining rapid cooling structure according to claim 1, characterized in that: the regulating valve is a manual butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021097112.0U CN213012940U (en) | 2020-06-15 | 2020-06-15 | Blast furnace hot blast main pipe refractory lining rapid cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021097112.0U CN213012940U (en) | 2020-06-15 | 2020-06-15 | Blast furnace hot blast main pipe refractory lining rapid cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213012940U true CN213012940U (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021097112.0U Active CN213012940U (en) | 2020-06-15 | 2020-06-15 | Blast furnace hot blast main pipe refractory lining rapid cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213012940U (en) |
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2020
- 2020-06-15 CN CN202021097112.0U patent/CN213012940U/en active Active
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