CN118127256A - Blast furnace wind temperature regulation and control system - Google Patents
Blast furnace wind temperature regulation and control system Download PDFInfo
- Publication number
- CN118127256A CN118127256A CN202410153547.9A CN202410153547A CN118127256A CN 118127256 A CN118127256 A CN 118127256A CN 202410153547 A CN202410153547 A CN 202410153547A CN 118127256 A CN118127256 A CN 118127256A
- Authority
- CN
- China
- Prior art keywords
- blast
- hot
- air
- blast furnace
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 claims abstract description 32
- 239000012530 fluid Substances 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a blast furnace air temperature regulation and control system which comprises a hot blast furnace, a hot blast branch pipe, a blast furnace hot blast main pipe, a blower and a cold blast bus, wherein the hot blast furnace is connected with the hot blast branch pipe, the hot blast branch pipe is connected with the blast furnace hot blast main pipe through a hot blast valve, the blower is connected with the cold blast bus, the cold blast bus is connected with a cold blast branch pipe and a mixed blast branch pipe through a bleeding valve, the cold blast branch pipe is provided with the cold blast valve, the cold blast branch pipe is connected with a cold blast inlet of the hot blast furnace, the mixed blast branch pipe is connected with the hot blast branch pipe after passing through a flow regulating valve and the mixed blast valve, and a connecting point formed by connecting the mixed blast branch pipe and the hot blast branch pipe is positioned in front of the hot blast valve. The hot air temperature difference in the front and rear hot air main pipes of the traditional air mixing vertical shaft can be eliminated, the integral temperature of the hot air main pipe is reduced, the work load of the hot air main pipe is slowed down, and the stable operation of the hot air system is ensured.
Description
Technical Field
The invention relates to the technical field of blast furnace hot air, in particular to a blast furnace air temperature regulating and controlling system.
Background
The hot air is an important energy source of the blast furnace, and the temperature of the hot air produced by the hot air furnace needs to be regulated in order to ensure the stability of the air temperature supplied to the blast furnace and the requirement of the blast furnace for the change of the air temperature under special furnace conditions. At present, cold air is added into a mixed air vertical shaft on a hot air main pipe to realize the adjustment of the temperature of the hot air.
With the enlargement of blast furnaces, the hot air system is also faced with new challenges due to the increase of wind temperature and wind pressure. When the air temperature exceeds 1250 ℃, the hot air main pipe works under the high-temperature high-air-temperature condition for a long time, and as the air temperature rises, the load of the hot air main pipe when the hot air is conveyed rises, so that the heat loss of the hot air main pipe can be increased, and the risk is brought to the stable operation of the hot air pipe system and the hot air valve. Cold air is added after the cold air passes through the air mixing vertical shaft, so that the stability of the blast furnace air temperature is maintained, and the problem that dew condensation corrosion is easy to occur because a low-temperature area exists in the lower part of the cold air vertical shaft for a long time.
Disclosure of Invention
Based on the problems, the application provides a blast furnace wind temperature regulating and controlling system.
The application provides a blast furnace air temperature regulation and control system which comprises a hot blast furnace, a hot blast branch pipe, a blast furnace hot blast main pipe, a blower and a cold blast bus, wherein the hot blast furnace is connected with the hot blast branch pipe, the hot blast branch pipe is connected with the blast furnace hot blast main pipe through a hot blast valve, the blower is connected with the cold blast bus, the cold blast bus is connected with a cold blast branch pipe and a mixed blast branch pipe through a bleeding valve, the cold blast branch pipe is provided with the cold blast valve, the cold blast branch pipe is connected with a cold blast inlet of the hot blast furnace, the mixed blast branch pipe is connected with the hot blast branch pipe after passing through a flow regulating valve and the mixed blast valve, and a connecting point formed by connecting the mixed blast branch pipe and the hot blast branch pipe is positioned in front of the hot blast valve.
In some embodiments, the blast furnace wind temperature regulation system further comprises a thermometer, the thermometer being disposed on the hot blast branch pipe.
In some embodiments, the thermometer is located in front of the hot blast valve in the fluid direction of the hot blast branch.
In some embodiments, a thermometer is mounted on the upper portion of the duct of the hot blast branch duct.
In some embodiments, the flow regulating valve is connected in parallel with a mixed air flow regulating branch line, and the mixed air flow regulating branch line is provided with the mixed air flow regulating valve.
In some embodiments, the branch line pipe aperture where the flow regulating valve is located is greater than the pipe aperture of the mixed air flow regulating branch line.
In some embodiments, the inlet of the hot air branch pipe is 1300-1350 ℃ hot air, and the hot air is mixed with cold air from the air mixing branch pipe to form 1000-1300 ℃ hot air.
In some embodiments, the provision of a mixing shaft in the blast furnace main shaft is eliminated.
In some embodiments, the connection point formed by the connection of the air mixing branch line and the hot air branch line is positioned at the lower part of the pipeline of the hot air branch line.
In some embodiments, each stove is provided with an independent blast furnace wind temperature regulation system.
The application has the following beneficial effects: the blast furnace air temperature regulation and control system is provided, the arrangement of an air mixing vertical shaft is canceled in a blast furnace hot air pipe system, independent air mixing of each hot air furnace is realized, and cold air is added into the blast furnace hot air pipe system through an inlet pipe system between a hot air outlet of each hot air furnace and a hot air valve, so that the regulation of the blast furnace air temperature is realized; the hot air temperature difference in the front and rear hot air main pipes of the traditional air mixing vertical shaft can be eliminated, the integral temperature of the hot air main pipe is reduced, the work load of the hot air main pipe is slowed down, and the stable operation of the hot air system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention.
FIG. 1 is an overall schematic diagram of a blast furnace wind temperature regulation system provided by the application;
Fig. 2 is a schematic diagram of a hot air branch pipe in the blast furnace air temperature control system according to the present application.
The drawings are marked: the device comprises a 1-blower, a 2-cold air bus, a 3-relief valve, a 4-cold air branch line, a 5-cold air valve, a 6-cold air inlet, a 7-hot blast stove, an 8-hot air branch line, a 9-thermometer, a 10-hot air valve, an 11-mixed air branch line, a 12-mixed air valve, a 13-flow regulating valve, a 14-mixed air flow regulating branch line and a 15-mixed air flow regulating valve.
Detailed Description
Referring to fig. 1, the present embodiment provides a blast furnace air temperature control system, which includes a hot blast stove 7, a hot blast branch pipe 8, a blast furnace hot blast main pipe, a blower 1 and a cold blast main pipe 2.
The hot blast stove 7 is connected with hot blast branch pipes 8, the hot blast branch pipes 8 are connected with a blast furnace hot blast main pipe (the blast furnace hot blast main pipe is not shown in fig. 1) through hot blast valves 10, the blower 1 is connected with a cold blast bus 2, and the cold blast bus 2 is connected with a cold blast branch pipe 4 and a mixed blast branch pipe 11 through a relief valve 3. The cold air branch line 4 is provided with a cold air valve 5, and the cold air branch line 4 and the hot air furnace 7 are connected to a cold air inlet 6 of the hot air furnace 7. The air mixing branch line 11 is connected with the hot air branch pipe 8 after passing through the flow regulating valve 13 and the air mixing valve 12, and a connection point formed by connecting the air mixing branch line 11 with the hot air branch pipe 8 is positioned in front of the hot air valve 10.
Cold air is generated by a blower 1, runs along a cold air line, is divided into two branch lines through a relief valve 3, and is respectively a cold air branch line 4 and a mixed air branch line 11. After passing through the cold air valve 5, cold air of the cold air branch line 4 enters the hot air furnace 7 through the cold air inlet 6, and is heated into hot air with the temperature of 1300-1350 ℃ in the hot air furnace 7. The hot air discharged from the hot air furnace 7 enters into the hot air branch pipe 8 and is mixed with cold air from the air mixing branch pipe 11 to form 1000-1300 ℃ hot air.
Hot air is used to enter the blast furnace hot air main pipe through the hot air valve 10. Wherein, the flow of cold air in the air mixing branch line 11 is controlled by a flow regulating valve 13, and enters the hot air branch line 8 through the air mixing valve 12.
According to the invention, the arrangement of a wind mixing vertical shaft in a blast furnace hot blast main pipe is canceled, and each hot blast furnace 7 is provided with an independent blast furnace wind temperature regulating and controlling system, so that independent wind mixing of each hot blast furnace 7 is realized. The blast temperature of the blast furnace is adjusted by adding cold air into a pipe system connected between the hot air outlet of each hot air furnace 7 and the hot air valve 10. Through the system, the hot air temperature difference in the front and rear hot air main pipes of the traditional air mixing vertical shaft can be eliminated, the integral temperature of the hot air main pipe is reduced, the work load of the hot air main pipe is slowed down, and the stable operation of the hot air system is ensured.
In some embodiments, referring to fig. 1, the blast furnace wind temperature control system further includes a thermometer 9, where the thermometer 9 is disposed on the hot blast branch pipe 8. A data base is provided for the control of the flow regulating valve 13 by means of the thermometer 9.
In some embodiments, referring to fig. 1 and 2 in combination, the thermometer 9 is located in front of the hot blast valve 10 in the fluid direction of the hot blast branch pipe 8. At this time, the connection point formed by the connection of the air mixing branch line 11 and the hot air branch line 8 and the thermometer 9 are all positioned in front of the hot air valve 10, which is beneficial to the adjustment of the flow rate regulating valve 13.
In some embodiments, referring to fig. 1, a thermometer 9 is installed at the upper portion of the duct of the hot blast branch pipe 8.
In some embodiments, referring to fig. 1, the flow control valve 13 is connected in parallel with the air mixing flow control branch line 14, the air mixing flow control branch line 14 is provided with the air mixing flow control valve 15, the flow control valve 13 and the air mixing flow control valve 15 form a parallel arrangement mode, and the air mixing flow control valve is combined to control the cold air flow, so that the accurate control of the blast furnace using air temperature is realized.
In some embodiments, the branch pipe caliber of the flow regulating valve 13 is larger than the pipe caliber of the mixed air flow regulating branch pipe 14, and fine adjustment is performed through the mixed air flow regulating valve 15. Through the system, the temperature difference in the front and rear pipe systems of the mixed air can be reduced, the overall temperature of the hot air main pipe is reduced, and meanwhile, the accurate control of the air temperature is realized.
In some embodiments, the hot air with 1300-1350 ℃ at the inlet of the hot air branch pipe 8 is mixed with cold air from the air mixing branch pipe 11 to form 1000-1300 ℃ hot air, and the hot air enters the blast furnace hot air main pipe through the hot air valve 10.
In some embodiments, the blower 1 is installed near the ground, and referring to fig. 1 and 2 in combination, a connection point formed by connecting the air mixing branch 11 and the hot air branch 8 is located at a lower portion of a pipeline of the hot air branch 8, so that the pipeline of the air mixing branch 11 is conveniently arranged.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A blast furnace wind temperature regulation system, comprising:
the hot blast furnace is connected with the hot blast branch pipes, and the hot blast branch pipes are connected with the blast furnace hot blast main pipe through hot blast valves;
The air blower is connected with the cold air bus, the cold air bus is connected with the cold air branch line and the mixed air branch line through the relief valve, the cold air branch line is provided with the cold air valve, the cold air branch line is connected with the hot air stove at the cold air inlet of the hot air stove, the mixed air branch line is connected with the hot air branch pipe after passing through the flow regulating valve and the mixed air valve, and the connecting point formed by the mixed air branch line and the hot air branch pipe is positioned in front of the hot air valve.
2. The blast furnace wind temperature regulation system of claim 1 further comprising a thermometer, the thermometer being disposed on the hot blast branch pipe.
3. The blast furnace wind temperature regulation system of claim 2 wherein said thermometer is positioned in front of said hot blast valve in the fluid flow direction of said hot blast branch.
4. The blast furnace wind temperature control system according to claim 2, wherein the thermometer is installed at an upper portion of a duct of the hot blast branch pipe.
5. The blast furnace wind temperature regulation system of claim 1 wherein the flow regulating valve is connected in parallel with a mixed wind flow regulating branch line, the mixed wind flow regulating branch line being fitted with a mixed wind flow regulating valve.
6. The blast furnace wind temperature regulating system according to claim 5, wherein the branch line pipe caliber of the flow regulating valve is larger than the pipe caliber of the mixed wind flow regulating branch line.
7. The blast furnace blast temperature regulating system according to any one of claims 1 to 6, wherein the hot air branch pipe is provided with hot air at 1300 to 1350 ℃ at the inlet, and the hot air is mixed with cold air from the air mixing branch pipe to form hot air at 1000 to 1300 ℃.
8. The blast furnace blast temperature regulating system according to claim 7, wherein the setting of a mixing shaft in a main hot blast main is eliminated.
9. The blast furnace wind temperature control system according to claim 1, wherein a connection point formed by the connection of the wind mixing branch line and the hot wind branch line is positioned at a lower portion of a pipe of the hot wind branch line.
10. The blast furnace wind temperature control system according to claim 1, wherein each hot blast stove is provided with an independent blast furnace wind temperature control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410153547.9A CN118127256A (en) | 2024-02-02 | 2024-02-02 | Blast furnace wind temperature regulation and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410153547.9A CN118127256A (en) | 2024-02-02 | 2024-02-02 | Blast furnace wind temperature regulation and control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118127256A true CN118127256A (en) | 2024-06-04 |
Family
ID=91234626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410153547.9A Pending CN118127256A (en) | 2024-02-02 | 2024-02-02 | Blast furnace wind temperature regulation and control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118127256A (en) |
-
2024
- 2024-02-02 CN CN202410153547.9A patent/CN118127256A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208650931U (en) | A kind of steam extraction heat supply unit quick response load system | |
| CN101981387A (en) | Boiler suppliable heating-water and hot-water simultaneously | |
| CN101709882A (en) | Coal-fired boiler hot primary wind heating system | |
| CN108825316A (en) | A kind of steam extraction heat supply unit quick response load system | |
| CN118127256A (en) | Blast furnace wind temperature regulation and control system | |
| CN106370034A (en) | Flue gas heat exchange system for urea pyrolysis | |
| CN108980949B (en) | Heat supply steam conveying system | |
| CN214032565U (en) | Blast furnace blast humidifying device | |
| US4492568A (en) | Process and apparatus for preheating the combustion mediums used for firing blast furnace stoves | |
| CN204987057U (en) | Coal pulverizer energy -conservation heat regenerative system that adjusts temperature | |
| CN212081794U (en) | Coke drying device | |
| CN213085806U (en) | Dilution air temperature control system of glass melting furnace | |
| CN206131023U (en) | Stable control gas boiler coal air preheater low temperature corrosion's device | |
| CN209196913U (en) | The thermoregulating system of coal-fired boiler hot primary wind and part water supply heat exchange | |
| CN2900546Y (en) | Blast furnace combined air-gas doulbe preheating waste heat recovery device | |
| CN111118245B (en) | High-temperature preheating system and method for hot blast stove | |
| CN111841861A (en) | System and method for reducing cold air volume of coal mill | |
| CN210773495U (en) | Smoke discharging and heat exchanging system of trolley type annealing furnace | |
| CN203907656U (en) | Hot air recirculation system of boiler | |
| CN111928290A (en) | Boiler flue gas treatment system | |
| CN220245931U (en) | Single fan circulating air system in AB zone of annealing kiln | |
| CN220728931U (en) | Heating system for accurately controlling temperature of lithium hydrochloric acid kiln | |
| CN214458121U (en) | Hot-blast stove for iron and steel plant | |
| CN212511234U (en) | Flue gas heat recovery system | |
| CN219037632U (en) | Preheating system for comprehensive utilization of flue gas waste heat and combustion furnace of hot blast stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |