CN215947336U - Hot air pipeline structure of blast furnace - Google Patents
Hot air pipeline structure of blast furnace Download PDFInfo
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- CN215947336U CN215947336U CN202122400048.XU CN202122400048U CN215947336U CN 215947336 U CN215947336 U CN 215947336U CN 202122400048 U CN202122400048 U CN 202122400048U CN 215947336 U CN215947336 U CN 215947336U
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Abstract
The utility model discloses a blast furnace hot air pipeline structure, which comprises a spherical hollow connector and a pipeline mechanism communicated with the interior of the connector, wherein the diameter of the interior of the connector is larger than the diameter of the interior of the pipeline mechanism Cracking, greatly reducing the construction difficulty of the refractory material, facilitating maintenance and reducing the use cost.
Description
Technical Field
The utility model relates to the technical field of hot blast stoves in metallurgy industry, in particular to a hot blast pipeline structure of a blast furnace.
Background
The heating and blast of the hot blast stove in the history of blast furnace iron making has been used for more than two hundred years, and the initial air temperature after heating is only 14 ℃, and the maximum air temperature reaches 1350 ℃ along with the continuous progress of the technology. The air temperature is improved, the coke ratio can be greatly reduced, coke is saved, the output of the blast furnace is improved, the blast furnace gas with low calorific value can be fully utilized, the heat efficiency is improved, the gas emission is reduced, the energy is saved, and the environment is protected.
The design direction of the hot air pipeline masonry structure is low stress and no overheating, however, as the blast furnace is gradually enlarged and efficient, the temperature of hot air in a pipeline system is required to be continuously increased, the diameter of the whole hot air pipeline system is also continuously increased, many problems are gradually appeared, and the problems are that a pipeline steel shell is overheated or even burns through due to the fact that bricks of refractory materials at the joint of the hot air pipelines collapse and fall, and serious industrial accidents and property loss are caused.
The joint parts of a main hot air pipe and branch pipes, a vertical pipe and a surrounding pipe in a hot air pipeline system mostly adopt the traditional three-way structure form of pipe-to-pipe, the design and the building of refractory materials are difficult, the building is not easy, the stress is concentrated, and the expansion and contraction force and the blast pressure are influenced by the temperature change, and the expansion amount of the pipeline and the refractory materials is different, so that the building body at the position is easy to crack and fall bricks in the production process, the pipe wall is exposed under high-temperature airflow, the local redness and deformation of the pipeline are caused, and even the pipe wall is subjected to brittle failure or grain boundary stress corrosion cracking, the service life of the hot air pipeline is seriously reduced, and the normal air supply of a blast furnace is influenced.
Therefore, it is a problem worth studying to provide a blast furnace hot air duct structure with a stable and safe structure, which is not easy to fall off from the refractory material.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides the blast furnace hot air pipeline structure which is convenient to design and construct, is not easy to drop refractory materials, and is stable and safe in structure.
The purpose of the utility model is realized as follows:
the utility model provides a blast furnace hot blast pipeline structure, is including being spherical and inside connector, the pipeline mechanism of the inside intercommunication with the connector that is hollow, and the inside diameter of connector is greater than pipeline mechanism's inside diameter.
And a reinforcing plate is arranged at the joint of the outer surface of the connecting body and the outer surface of the pipeline mechanism.
Pipeline mechanism includes the first trunk line with the left surface intercommunication of connector, the second trunk line with the right surface intercommunication of connector, the small transfer line with the connector intercommunication, and the inside diameter of connector is greater than the inside diameter of first trunk line, the inside diameter of second trunk line and the inside diameter of small transfer line.
The pipe wall of the pipeline mechanism comprises a first shell, a first fire-resistant spray coating layer, a first heat preservation layer and a first heat-resistant working layer, the first shell, the first fire-resistant spray coating layer, the first heat preservation layer and the first heat-resistant working layer are sequentially distributed from outside to inside, and the first heat preservation layer and the first heat-resistant working layer are formed by building refractory bricks made of a plurality of different materials or pouring materials.
The pipe wall of the connector comprises a second shell, a second fire-resistant spray coating layer, a second heat preservation layer and a second heat-resistant working layer, the second shell, the second fire-resistant spray coating layer, the second heat preservation layer and the second heat-resistant working layer are sequentially distributed from outside to inside, and the second shell, the second heat preservation layer and the second heat-resistant working layer are spherical.
The second heat preservation layer is formed by building hexagonal wedge-shaped heat preservation bricks and pentagonal wedge-shaped heat preservation bricks, the five sides of the pentagonal wedge-shaped heat preservation bricks are equal in length to the six sides of the hexagonal wedge-shaped heat preservation bricks, the outer surface area of the pentagonal wedge-shaped heat preservation bricks is larger than the inner surface area of the pentagonal wedge-shaped heat preservation bricks, the outer surface area of the hexagonal wedge-shaped heat preservation bricks is larger than the inner surface area of the hexagonal wedge-shaped heat preservation bricks, and the hexagonal wedge-shaped heat preservation bricks and the pentagonal wedge-shaped heat preservation bricks are built around the heat preservation bricks of the pipeline mechanism.
The second layer is formed by building the hexagonal wedge-shaped refractory bricks and the pentagonal wedge-shaped refractory bricks, the five edges of the pentagonal wedge-shaped refractory bricks are equal to the six edges of the hexagonal wedge-shaped refractory bricks in length, the outer surface area of the pentagonal wedge-shaped refractory bricks is larger than the inner surface area of the pentagonal wedge-shaped refractory bricks, the outer surface area of the hexagonal wedge-shaped refractory bricks is larger than the inner surface area of the hexagonal wedge-shaped refractory bricks, and the hexagonal wedge-shaped refractory bricks and the pentagonal wedge-shaped refractory bricks are built by surrounding the refractory bricks of the pipeline mechanism.
The second heat-insulating layer is formed by integrally pouring materials.
The second heat-resistant working layer is formed by integrally pouring materials.
Has the positive and beneficial effects that: the spherical connecting body is arranged, so that the structure of the blast furnace hot air pipeline has higher stability, the phenomenon that hot air leaks to burn through a steel shell due to brick falling and cracking is avoided, the maintenance is more convenient, the use cost is reduced, the first heat-insulating layer and the first heat-resisting working layer are positioned in the second shell, the inner brickwork of the pipeline can extend towards the inside of the connecting body under the working condition of high air temperature, the mechanical deformation is responded, various mechanical vibrations are absorbed, the pipeline deformation stress is reduced, the service life of the pipeline is prolonged, the brick falling and cracking caused by repeated expansion and contraction of the refractory material in the pipeline under the working condition of high temperature are greatly avoided, and the building difficulty of the refractory material is greatly reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a cross-sectional view taken along the line A-A;
FIG. 5 is an enlarged schematic view of part B;
in the figure, the following steps are carried out: connector 1, first trunk line 2, second trunk line 3, small transfer line 4, first casing 5, first fire-resistant flame retardant coating layer 6, first heat preservation 7, first heat-resisting working layer 8, second casing 9, second fire-resistant flame retardant coating layer 10, second heat preservation 11, second heat-resisting working layer 12.
Detailed Description
The utility model is further illustrated by the following figures and examples.
Example 1
As shown in fig. 1 to 3, a hot blast pipeline structure of a blast furnace comprises a spherical connecting body 1 with a hollow interior and a pipeline mechanism communicated with the interior of the connecting body 1, wherein the hollow interior of the connecting body 1 is spherical, the diameter of the interior of the connecting body 1 is larger than the diameter of the interior of the pipeline mechanism, and the problems of irregular structure and stress concentration at the joint of the pipeline mechanism and the connecting body are solved. The pipeline mechanism comprises a first main pipeline 2 communicated with the left side face of a connector 1, a second main pipeline 3 communicated with the right side face of the connector 1, and a branch pipeline 4 communicated with the connector 1, wherein the diameter of the inside of the connector 1 is larger than the inside diameter of the first main pipeline 2, the inside diameter of the second main pipeline 3 and the inside diameter of the branch pipeline 4, the first pipeline 2 and the second pipeline 3 are arranged on the same straight line and are spherical connectors, so that masonry expansion of the pipeline mechanism extends towards the inside of the connector 1 under the working condition of high wind temperature, mechanical deformation is responded, various mechanical vibration is absorbed, pipeline deformation stress is reduced, the service life of the pipeline is prolonged, the problem that bricks and cracks fall off and are caused by repeated expansion and contraction of an internal refractory material of the pipeline mechanism under the high-temperature working condition is greatly solved, the construction difficulty of the refractory material is greatly reduced, and maintenance is more convenient, the use cost is reduced.
Example 2
As shown in fig. 1 to 3, a hot blast pipeline structure of a blast furnace comprises a spherical connecting body 1 with a hollow interior and a pipeline mechanism communicated with the interior of the connecting body 1, wherein the hollow interior of the connecting body 1 is spherical, and the diameter of the interior of the connecting body 1 is larger than the diameter of the interior of the pipeline mechanism, so that the problems of irregular structure and stress concentration at the joint of the pipeline mechanism and the connecting body are solved, and the service life of the pipeline mechanism is prolonged. The pipeline mechanism comprises a first main pipeline 2 communicated with the left side face of a connector 1, a second main pipeline 3 communicated with the right side face of the connector 1, and a branch pipeline 4 communicated with the connector 1, wherein the diameter of the inside of the connector 1 is larger than the inside diameter of the first main pipeline 2, the inside diameter of the second main pipeline 3 and the inside diameter of the branch pipeline 4, the first pipeline 2 and the second pipeline 3 are arranged on the same straight line and are spherical connectors, so that masonry expansion of the pipeline mechanism extends towards the inside of the connector 1 under the working condition of high wind temperature, mechanical deformation is responded, various mechanical vibration is absorbed, pipeline deformation stress is reduced, the service life of the pipeline is prolonged, the problem that bricks and cracks fall off and are caused by repeated expansion and contraction of an internal refractory material of the pipeline mechanism under the high-temperature working condition is greatly solved, the construction difficulty of the refractory material is greatly reduced, and maintenance is more convenient, the use cost is reduced.
As shown in fig. 4 and 5, the pipe wall of the pipeline mechanism includes a first shell 5, a first fire-resistant spray coating layer 6, a first heat preservation layer 7 and a first heat-resistant working layer 8, the first shell 5, the first fire-resistant spray coating layer 6, the first heat preservation layer 7 and the first heat-resistant working layer 8 are sequentially distributed from outside to inside, the first heat preservation layer 7 and the first heat-resistant working layer 8 can be formed by building or pouring a plurality of refractory bricks, the refractory hot bricks at the end of the pipeline mechanism are located inside the connecting body 1, the heat preservation bricks at the end of the pipeline mechanism are located inside the connecting body 2, expansion joints reserved or not reserved for the expansion joints of the pipeline mechanism are reduced, the service life of the pipeline mechanism is prolonged, under the working condition of high wind temperature, the first heat preservation layer 7 and the first heat-resistant working layer 8 inside the pipeline mechanism can expand to extend into the connecting body 1, and should absorb various mechanical deformations and reduce the pipeline deformation stress, the service life of the pipeline is prolonged, the brick falling and cracking caused by repeated expansion and contraction of the internal refractory material of the pipeline mechanism under the high-temperature working condition are greatly improved, and the construction difficulty of the refractory material is greatly reduced.
The pipe wall of the connector 1 comprises a second shell 9, a second fire-resistant spray coating layer 10, a second heat-insulating layer 11 and a second heat-resistant working layer 12, the second shell 9, the second fire-resistant spray coating layer 10, the second heat-insulating layer 11 and the second heat-resistant working layer 12 are distributed from outside to inside in sequence, and the second shell 9, the second heat-insulating layer 11 and the second heat-resistant working layer 12 are spherical.
The second heat preservation layer 11 can be formed by combining and building hexagonal wedge-shaped heat preservation bricks and pentagonal wedge-shaped heat preservation bricks, the five sides of the pentagonal wedge-shaped heat preservation bricks are equal in length to the six sides of the hexagonal wedge-shaped heat preservation bricks, the outer surface area of the pentagonal wedge-shaped heat preservation bricks is larger than the inner surface area of the pentagonal wedge-shaped heat preservation bricks, the outer surface area of the hexagonal wedge-shaped heat preservation bricks is larger than the inner surface area of the hexagonal wedge-shaped heat preservation bricks, the hexagonal wedge-shaped heat preservation bricks and the pentagonal wedge-shaped heat preservation bricks are built around the heat preservation bricks of the pipeline mechanism, and the hexagonal wedge-shaped heat preservation bricks and the pentagonal wedge-shaped heat preservation bricks are combined into a spherical structure to have a self-locking effect.
The second heat-resisting working layer 12 can be formed by building a combination of hexagonal wedge-shaped refractory bricks and pentagonal wedge-shaped refractory bricks, five edges of the pentagonal wedge-shaped refractory bricks are equal in length to six edges of the hexagonal wedge-shaped refractory bricks, the outer surface area of the pentagonal wedge-shaped refractory bricks is larger than the inner surface area of the pentagonal wedge-shaped refractory bricks, the outer surface area of the hexagonal wedge-shaped refractory bricks is larger than the inner surface area of the hexagonal wedge-shaped refractory bricks, the hexagonal wedge-shaped refractory bricks and the pentagonal wedge-shaped refractory bricks form a sphere structure and have a self-locking effect, and the hexagonal wedge-shaped refractory bricks and the pentagonal wedge-shaped refractory bricks are built by surrounding the refractory bricks of the pipeline mechanism.
Example 3:
as shown in fig. 1 to 3, a hot blast pipeline structure of a blast furnace comprises a spherical connecting body 1 with a hollow interior and a pipeline mechanism communicated with the interior of the connecting body 1, wherein the hollow interior of the connecting body 1 is spherical, and the diameter of the interior of the connecting body 1 is larger than the diameter of the interior of the pipeline mechanism, so that the problems of irregular structure and stress concentration at the joint of the pipeline mechanism and the connecting body are solved, and the service life of the pipeline mechanism is prolonged. The pipeline mechanism comprises a first main pipeline 2 communicated with the left side face of a connector 1, a second main pipeline 3 communicated with the right side face of the connector 1, and a branch pipeline 4 communicated with the connector 1, wherein the diameter of the inside of the connector 1 is larger than the inside diameter of the first main pipeline 2, the inside diameter of the second main pipeline 3 and the inside diameter of the branch pipeline 4, the first pipeline 2 and the second pipeline 3 are arranged on the same straight line and are spherical connectors, so that masonry expansion of the pipeline mechanism extends towards the inside of the connector 1 under the working condition of high wind temperature, mechanical deformation is responded, various mechanical vibration is absorbed, pipeline deformation stress is reduced, the service life of the pipeline is prolonged, the problem that bricks and cracks fall off and are caused by repeated expansion and contraction of an internal refractory material of the pipeline mechanism under the high-temperature working condition is greatly solved, the construction difficulty of the refractory material is greatly reduced, and maintenance is more convenient, the use cost is reduced.
As shown in fig. 4 and 5, the pipe wall of the pipeline mechanism includes a first shell 5, a first fire-resistant spray coating layer 6, a first heat preservation layer 7 and a first heat-resistant working layer 8, the first shell 5, the first fire-resistant spray coating layer 6, the first heat preservation layer 7 and the first heat-resistant working layer 8 are sequentially distributed from outside to inside, the first heat preservation layer 7 and the first heat-resistant working layer 8 can be formed by building or pouring a plurality of refractory bricks, the refractory bricks at the end of the pipeline mechanism are located inside the connecting body 1, the heat preservation bricks at the end of the pipeline mechanism are located inside the connecting body 2, expansion joints are reserved or not reserved for the expansion joints of the pipeline mechanism, the service life of the pipeline mechanism is prolonged, under the high wind temperature condition, the first heat preservation layer 7 and the first heat-resistant working layer 8 inside the pipeline mechanism expand and can extend towards the inside of the connecting body 1, and should absorb various mechanical vibrations and reduce the deformation stress of the pipeline, the service life of the pipeline is prolonged, the brick falling and cracking caused by repeated expansion and contraction of the internal refractory material of the pipeline mechanism under the high-temperature working condition are greatly improved, and the construction difficulty of the refractory material is greatly reduced.
The pipe wall of the connector 1 comprises a second shell 9, a second fire-resistant spray coating layer 10, a second heat-insulating layer 11 and a second heat-resistant working layer 12, the second shell 9, the second fire-resistant spray coating layer 10, the second heat-insulating layer 11 and the second heat-resistant working layer 12 are distributed from outside to inside in sequence, and the second shell 9, the second heat-insulating layer 11 and the second heat-resistant working layer 12 are spherical.
The second heat-insulating layer 11 is formed by integrally pouring materials. The second heat-resistant working layer 12 is formed by integrally pouring materials.
The spherical connecting body is arranged, so that the structure of the blast furnace hot air pipeline has higher stability, the phenomenon that hot air leaks to burn through a steel shell due to brick falling and cracking is not easy to occur, the maintenance is more convenient, the use cost is reduced, the first heat-insulating layer and the first heat-resisting working layer are positioned in the second shell, the inner brickwork of the pipeline can extend towards the inside of the connecting body under the working condition of high air temperature, the effects of reducing the deformation stress of the pipeline and prolonging the service life of the pipeline are achieved by responding to mechanical deformation and absorbing various mechanical vibrations, the brick falling and cracking caused by repeated expansion and contraction of the inner refractory material of the pipeline mechanism under the high-temperature working condition are greatly improved, the construction difficulty of refractory materials is greatly reduced, the maintenance is more convenient, and the use cost is reduced.
Claims (9)
1. The utility model provides a blast furnace hot-blast pipeline structure which characterized in that: the pipeline mechanism comprises a spherical connector and a pipeline mechanism communicated with the inside of the connector, wherein the inside of the connector is hollow, and the diameter of the inside of the connector is larger than the inside diameter of the pipeline mechanism.
2. The blast furnace hot blast duct structure according to claim 1, wherein: and a reinforcing plate is arranged at the joint of the outer surface of the connecting body and the outer surface of the pipeline mechanism.
3. The blast furnace hot blast duct structure according to claim 1, wherein: pipeline mechanism includes the first trunk line with the left surface intercommunication of connector, the second trunk line with the right surface intercommunication of connector, the small transfer line with the connector intercommunication, and the inside diameter of connector is greater than the inside diameter of first trunk line, the inside diameter of second trunk line and the inside diameter of small transfer line.
4. The blast furnace hot blast duct structure according to claim 1, wherein: the pipe wall of pipeline mechanism includes first casing, a fire-resistant flame retardant coating layer, first heat preservation and first heat-resisting working layer, and first casing, a fire-resistant flame retardant coating layer, first heat preservation and first heat-resisting working layer distribute from outer to inner in proper order, and first heat-resisting working layer adopts a plurality of resistant firebricks to build by laying bricks or stones and forms, and first heat preservation adopts a plurality of light insulating brick to build by laying bricks or stones and forms, and the resistant firebrick of pipeline mechanism tip is located the inside of connector, and the insulating brick of pipeline mechanism tip is located the inside of connector.
5. The blast furnace hot blast duct structure according to claim 1, wherein: the pipe wall of the connector comprises a second shell, a second fire-resistant spray coating layer, a second heat preservation layer and a second heat-resistant working layer, the second shell, the second fire-resistant spray coating layer, the second heat preservation layer and the second heat-resistant working layer are sequentially distributed from outside to inside, and the second shell, the second heat preservation layer and the second heat-resistant working layer are spherical.
6. The blast furnace hot blast duct structure according to claim 5, wherein: the second heat preservation layer is formed by building hexagonal wedge-shaped heat preservation bricks and pentagonal wedge-shaped heat preservation bricks, the five sides of the pentagonal wedge-shaped heat preservation bricks are equal in length to the six sides of the hexagonal wedge-shaped heat preservation bricks, the outer surface area of the pentagonal wedge-shaped heat preservation bricks is larger than the inner surface area of the pentagonal wedge-shaped heat preservation bricks, the outer surface area of the hexagonal wedge-shaped heat preservation bricks is larger than the inner surface area of the hexagonal wedge-shaped heat preservation bricks, and the hexagonal wedge-shaped heat preservation bricks and the pentagonal wedge-shaped heat preservation bricks are built around the heat preservation bricks of the pipeline mechanism.
7. The blast furnace hot blast duct structure according to claim 5, wherein: the second heat-resisting working layer is formed by building hexagonal wedge-shaped refractory bricks and pentagonal wedge-shaped refractory bricks, the five edges of the pentagonal wedge-shaped refractory bricks are equal to the six edges of the hexagonal wedge-shaped refractory bricks in length, the outer surface area of the pentagonal wedge-shaped refractory bricks is larger than the inner surface area of the pentagonal wedge-shaped refractory bricks, the outer surface area of the hexagonal wedge-shaped refractory bricks is larger than the inner surface area of the hexagonal wedge-shaped refractory bricks, and the hexagonal wedge-shaped refractory bricks and the pentagonal wedge-shaped refractory bricks are built by surrounding the refractory bricks of the pipeline mechanism.
8. The blast furnace hot blast duct structure according to claim 5, wherein: the second heat-insulating layer is formed by integrally pouring materials.
9. The blast furnace hot blast duct structure according to claim 5, wherein: the second heat-resistant working layer is formed by integrally pouring materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122400048.XU CN215947336U (en) | 2021-10-01 | 2021-10-01 | Hot air pipeline structure of blast furnace |
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| CN202122400048.XU CN215947336U (en) | 2021-10-01 | 2021-10-01 | Hot air pipeline structure of blast furnace |
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