CN116377151A - Air-cooled main ditch reinforced natural cooling device - Google Patents
Air-cooled main ditch reinforced natural cooling device Download PDFInfo
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- CN116377151A CN116377151A CN202310294515.6A CN202310294515A CN116377151A CN 116377151 A CN116377151 A CN 116377151A CN 202310294515 A CN202310294515 A CN 202310294515A CN 116377151 A CN116377151 A CN 116377151A
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- cooled
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- 238000001816 cooling Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 238000009423 ventilation Methods 0.000 claims abstract description 45
- 239000011449 brick Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000004020 conductor Substances 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 238000010079 rubber tapping Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000005336 cracking Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention provides an air-cooled main channel reinforced natural cooling device, which belongs to the technical field of blast furnace main channel cooling, and comprises a main channel frame, wherein a main channel working part is arranged in the main channel frame, a ventilation channel with a U-shaped cross section is arranged between the main channel frame and the main channel working part, a fireproof precast slab is blocked on the top opening of the ventilation channel, a heat conducting connecting plate is also blocked on the top opening of the ventilation channel, an exhaust pipeline is arranged on the heat conducting connecting plate, and the exhaust pipeline adopts heat conducting materials; the heat-conducting connecting plate is provided with a through hole which is communicated with the exhaust pipeline and the ventilation channel; the outside of the main ditch working part is provided with a steel shell, the steel shell is connected with a heat conduction connecting plate, a ventilation channel is arranged between the main ditch working part and a main ditch frame, an exhaust pipeline is arranged at one end of the ventilation channel, which is close to a blast furnace tapping hole, so that a chimney structure of a semi-closed space is formed, the chimney effect is utilized to realize forced air circulation in a natural state, and the heat dissipation problem of the natural cooling air-cooled main ditch steel shell is further solved.
Description
Technical Field
The invention belongs to the technical field of blast furnace main channel cooling, and particularly relates to an air-cooled main channel reinforced natural cooling device.
Background
The main blast furnace channel is an important facility in front of the blast furnace and has the function of separating liquid slag from iron. With the large-scale and intensified smelting of the blast furnace, the use condition of the main ditch is increasingly harsh, the service life of the main ditch greatly influences the labor intensity of operators in front of the furnace, the consumption of ton iron refractory materials and even the normal production of the blast furnace.
With the increase of the blast furnace and the increase of the requirement on the main communication iron quantity, the service life of the steel shell becomes an important factor influencing the service life of the main ditch, and the domestic typical main ditch can be divided into a heat insulation main ditch and a cooling main ditch according to different cooling modes, wherein the cooling main ditch is mainly an air-cooled main ditch, and the air-cooled main ditch is naturally cooled and forcedly cooled. The forced cooling air-cooled main groove forces air outside the steel shell to circulate by arranging a forced air cooler at the groove head of the main groove so as to reduce the temperature of the steel shell and further prolong the service lives of the steel shell and the main groove refractory material of the main groove; under the condition that the main ditch is supported, the natural cooling air-cooled main ditch reduces the concrete structure outside the steel shell as much as possible, and avoids heat aggregation, so as to achieve the purpose of natural cooling.
The heat insulation type main ditch is buried in a cast house due to the steel shell, and the temperature rise is delayed through heat insulation, but the problems of cracking and deformation of the steel shell are unavoidable in the frequent heating and cooling processes, and the steel shell needs to be overhauled once every three years.
The natural air-cooled main ditch realizes cooling by means of natural contact and convection of the steel shell and air, but the effect is unsatisfactory, and especially the problem that the service life of the main ditch is influenced by deformation and cracking of the steel shell is still serious when the temperature of the steel shell reaches more than 300 ℃ because more air-cooled main ditches are closed.
The forced air cooling type main ditch can solve the problems of temperature rise, deformation, cracking and the like of the steel shell, effectively prolongs the service life of the main ditch, but the forced air cooling type main ditch needs to increase investment and has higher operation and maintenance cost, and is also a waste of energy.
Particularly in recent years, with the development of an air-cooled prefabricated member main channel, how to realize the service life of a primary prefabricated member generation of the main channel, and a cost-effective cooling mode for a steel shell are problems which need to be solved.
Disclosure of Invention
In order to solve the technical problems of poor cooling effect, high cooling energy consumption and the like of an air-cooled main channel, the invention provides an air-cooled main channel reinforced natural cooling device, which solves the problem of overhigh temperature of a main channel steel shell caused by poor air fluidity outside the main channel steel shell, thereby avoiding deformation and cracking of the steel shell and prolonging the service life of the main channel.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an air-cooled main ditch strengthening natural cooling device comprises a main ditch frame, wherein a main ditch working part is arranged in the main ditch frame, a ventilation channel with a U-shaped section is arranged between the main ditch frame and the main ditch working part, a fireproof precast slab is blocked on the top opening of the ventilation channel, a heat-conducting connecting plate is also blocked on the top opening of the ventilation channel, an exhaust pipeline is arranged on the heat-conducting connecting plate, and the exhaust pipeline is made of heat-conducting materials; the heat-conducting connecting plate is provided with a through hole which is communicated with the exhaust pipeline and the ventilation channel;
the outer side of the main ditch working part is provided with a steel shell which is connected with a heat-conducting connecting plate; a ventilation channel is arranged between the main channel working part and the main channel frame, and an exhaust pipeline is communicated with the ventilation channel, so that hot air in the ventilation channel can naturally circulate with external cold air, the natural ventilation effect is enhanced by utilizing the exhaust pipeline, a chimney effect is formed, and the forced circulation of air in a natural state is realized.
Further, the main ditch working part adopts an air-cooled prefabricated member main ditch with the length of more than 10 meters, and the service life of a first-generation furnace is realized by utilizing the air-cooled prefabricated member main ditch.
Further, a refractory brick layer is paved on the bottom surface of the steel shell, a pouring material layer is arranged above the refractory brick layer, the inner side surface of the steel shell is covered with a prefabricated member block, and the steel shell is insulated through the refractory brick layer, the pouring material layer and the prefabricated member block.
Further, the bottom surface of the main ditch frame is provided with a ditch bottom concrete beam, a ditch bottom steel beam is arranged on the ditch bottom concrete beam, the main ditch working part is supported above the ditch bottom steel beam, the main ditch working part is supported by the ditch bottom steel beam, the distance between the steel shell of the main ditch working part and the ditch bottom concrete beam is controlled, and the bottom height of the ventilation channel is controlled.
Further, the heat conduction connecting plate is plugged on the top opening of the ventilation channel at the inflow end of the main channel working part, and the exhaust pipeline is arranged in the area with the highest temperature of the ventilation channel, so that a better forced cooling effect is realized.
Further, the heat conduction connecting plate is a steel plate, round holes are formed in the steel plate, and good heat conduction performance is achieved through the steel plate.
Further, refractory castable is poured on the outer side of the joint of the exhaust pipeline and the heat conduction connecting plate, and the exhaust pipeline is protected by the refractory castable, so that the exhaust pipeline is prevented from being damaged by splashed slag iron.
Further, the ventilating cap is arranged at the top of the exhaust pipeline, so that the influence of weather change on ventilation is avoided.
From the above technical scheme, the invention has the following advantages:
1. according to the invention, the ventilation channel is arranged between the main channel working part and the main channel frame, the exhaust pipeline is arranged at one end of the ventilation channel close to the blast furnace tapping hole, so that a semi-closed space 'chimney' structure is formed, and the steel plate is arranged between the exhaust pipeline and the steel shell to serve as a heat conduction connecting plate, so that hot air in the ventilation channel can naturally circulate with external cold air, a 'chimney' effect is formed, forced air circulation under a natural state is realized, and the problem of heat dissipation of the existing natural cooling air-cooled main channel steel shell is solved.
2. On the basis of solving the problem of heat dissipation of the natural cooling air-cooled main channel steel shell, a powerful fan is not required to be arranged for forced air blowing, so that the energy consumption is greatly reduced, the operation cost of the blast furnace is reduced, and the technical problem of high energy consumption of the current air-cooled main channel cooling is solved; meanwhile, a guarantee is provided for the primary furnace service life of the air-cooled prefabricated member main channel, the cooling effect of the steel shell is improved, the deformation and cracking of the steel shell are avoided, and the problem of overhauling the air-cooled prefabricated member main channel caused by the steel shell is solved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
It can be seen that the present invention has outstanding substantial features and significant advances over the prior art, as well as its practical advantages.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the air-cooled main duct enhanced natural cooling device according to the present invention.
FIG. 2 is a schematic cross-sectional view of the air-cooled main duct enhanced natural cooling device according to the present invention.
FIG. 3 is a schematic top view of the air-cooled main duct enhanced natural cooling device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to the drawings, in the drawings, 1, a prefabricated block assembly; 2. pouring a material layer; 3. a layer of firebrick; 4. a ditch bottom steel girder; 5. a trench bottom concrete beam; 6. an exhaust duct; 7. a ventilation cap; 8. a steel shell; 9. a blast furnace tap hole; 10. a frame structure retaining wall; 11. a main trench frame; 12. a refractory precast slab; 13. a ventilation channel; 14. and (3) a steel plate.
As shown in fig. 1, 2 and 3, the air-cooled main ditch reinforced natural cooling device comprises a main ditch frame 11, wherein a main ditch working part is arranged in the main ditch frame 11, a ventilation channel 13 with a U-shaped section is arranged between the main ditch frame 11 and the main ditch working part, a fireproof precast slab 12 is blocked on the top opening of the ventilation channel 13, the fireproof precast slab 12 is used for blocking the top opening of the ventilation channel 13, a heat-conducting connecting plate is also blocked on the top opening of the ventilation channel 13, an exhaust pipeline 6 is arranged on the heat-conducting connecting plate, and the exhaust pipeline 6 is made of heat-conducting materials; the heat conduction connecting plate is provided with a through hole, and the through hole is used for communicating the exhaust pipeline and the ventilation channel.
The outside of the main ditch working part is provided with a steel shell 8, and the steel shell 8 is connected with a heat conduction connecting plate.
The main ditch working part adopts an air-cooled prefabricated member main ditch with the length of 22 meters and comprises a steel shell 8, wherein a refractory brick layer 3 is paved on the bottom surface of the steel shell 8, a castable layer 2 is arranged above the refractory brick layer 3, and the castable layer 2 is used as a main ditch working surface; the inner side surface of the steel shell 8 is covered with the precast block assembly 1 to insulate the steel shell 8.
The bottom surface of the main ditch frame 11 is provided with a ditch bottom concrete beam 5, two sides of the main ditch frame 11 are provided with frame structure retaining walls 10, the ditch bottom concrete beam 5 is provided with a ditch bottom steel beam 4, a main ditch working part is supported above the ditch bottom steel beam 4, the main ditch working part is supported by utilizing the ditch bottom steel beam 4, and the distance between a steel shell 8 of the main ditch working part and the ditch bottom concrete beam 5 is controlled, namely, the bottom height of a ventilation channel 13 is controlled.
Preferably, the distance between the steel shell 8 of the main channel work portion and the main channel frame 11 is 435mm.
In order to strengthen natural ventilation, two sides of one end of a main channel working part, which is close to a blast furnace tapping hole 9, are provided with openings at the top, which are closed by using a steel plate 14 instead of a refractory precast slab 12, 180mm round holes are formed in the steel plate 14 in advance, an exhaust pipeline 6 with the diameter of about 200mm is erected by using a buried steel plate 14, the exhaust pipeline 6 extends upwards out of the main channel working part along a main channel frame 11, the exhaust pipeline 6 is supported and erected by using the main channel frame 11, and the steel plate 14 is pre-buried on the top surface of the main channel frame 11, and refractory castable is poured outside the junction between the exhaust pipeline 6 and the main channel frame 11 for protection, so that the damage of splash slag iron is avoided.
The ventilation cap 7 is arranged at the top of the exhaust pipeline 6, so that the influence of weather changes on ventilation is avoided.
Because the steel shell 8 of the main ditch working part has higher temperature, the exhaust pipeline 6 and the steel shell 8 are connected by utilizing the heat conduction function of the heat conduction connecting plate, so that the air inside the exhaust pipeline 6 and the ventilation channel 13 has larger temperature difference with the outside, and the density difference of the air inside and outside the exhaust pipeline 6 is caused, thereby forming the pressure difference inside and outside the exhaust pipeline 6, and the air inside the ventilation channel 13 is caused to form air flow with the outside atmosphere through the exhaust pipeline 6, so that the exhaust pipeline 6 becomes a chimney of the ventilation channel 13. The air with high temperature in the ventilation channel 13 rises due to small specific gravity and is discharged through the exhaust pipeline 6, so that a negative pressure area is formed in the ventilation channel 13, and external cold air is sucked into the ventilation channel 13, thereby promoting the air to continuously flow in the ventilation channel 13, forming a chimney effect and realizing a forced cooling effect under the natural ventilation condition.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The air-cooled main ditch strengthening natural cooling device is characterized by comprising a main ditch frame, wherein a main ditch working part is arranged in the main ditch frame, a ventilation channel with a U-shaped cross section is arranged between the main ditch frame and the main ditch working part, a fireproof precast slab is blocked on the top opening of the ventilation channel, a heat conduction connecting plate is also blocked on the top opening of the ventilation channel, an exhaust pipeline is arranged on the heat conduction connecting plate, and the exhaust pipeline is made of heat conduction materials; the heat-conducting connecting plate is provided with a through hole which is communicated with the exhaust pipeline and the ventilation channel;
the outside of the main ditch working part is provided with a steel shell which is connected with a heat conduction connecting plate.
2. The air-cooled main duct enhanced natural cooling device of claim 1, wherein the main duct working portion employs an air-cooled prefabricated member main duct having a length of greater than 10 meters.
3. The air-cooled main channel reinforced natural cooling device of claim 1, wherein a refractory brick layer is laid on the bottom surface of the steel shell, a pouring material layer is arranged above the refractory brick layer, and the inner side surface of the steel shell is covered with prefabricated member blocks.
4. The air-cooled main channel-reinforcing natural cooling device as set forth in claim 1, wherein a channel bottom concrete beam is provided on a bottom surface of the main channel frame, a channel bottom steel beam is provided on the channel bottom concrete beam, and a main channel working portion is supported above the channel bottom steel beam.
5. The air-cooled main duct enhanced natural cooling device of claim 1, wherein the heat-conducting connection plate is plugged onto a top opening of a ventilation channel at an inflow end of the main duct working portion.
6. The air-cooled main duct enhanced natural cooling device of claim 1, wherein the thermally conductive connecting plate is a steel plate, and the steel plate is provided with round holes.
7. The air-cooled main duct enhanced natural cooling device of claim 1, wherein refractory castable is poured outside the junction of the exhaust duct and the thermally conductive connecting plate.
8. The air-cooled main duct enhanced natural cooling device of claim 1, wherein a ventilator cap is provided on top of the exhaust duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310294515.6A CN116377151A (en) | 2023-03-21 | 2023-03-21 | Air-cooled main ditch reinforced natural cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310294515.6A CN116377151A (en) | 2023-03-21 | 2023-03-21 | Air-cooled main ditch reinforced natural cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116377151A true CN116377151A (en) | 2023-07-04 |
Family
ID=86974309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310294515.6A Pending CN116377151A (en) | 2023-03-21 | 2023-03-21 | Air-cooled main ditch reinforced natural cooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116377151A (en) |
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2023
- 2023-03-21 CN CN202310294515.6A patent/CN116377151A/en active Pending
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