CN101818220A - Blast-furnace gas heating-up system - Google Patents
Blast-furnace gas heating-up system Download PDFInfo
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- CN101818220A CN101818220A CN200910263095A CN200910263095A CN101818220A CN 101818220 A CN101818220 A CN 101818220A CN 200910263095 A CN200910263095 A CN 200910263095A CN 200910263095 A CN200910263095 A CN 200910263095A CN 101818220 A CN101818220 A CN 101818220A
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Abstract
The invention discloses a blast-furnace gas heating-up system comprising a gas pressurizer, a high-pressure combustion furnace, a high-pressure ignition device and a detection and control device, wherein an anti-explosion valve is arranged on the high-pressure combustion furnace; an inlet of the gas pressurizer is connected with a blast-furnace gas delivering pipeline, the outlet of the gas pressurizer is connected with a blast-furnace gas inlet of the high-pressure combustion furnace, an inlet of the gas pressurizer is connected with a doped gas inlet of the high-pressure combustion furnace, and a compressed air pipeline is connected with a combustion-assistant air inlet of the high-pressure combustion furnace through a pressure adjusting valve; the high-pressure ignition device is arranged on the high-pressure combustion furnace and is connected with the compressed air pipeline, and a hot air outlet of the high-pressure combustion furnace is connected with the blast-furnace gas delivering pipeline through a pipeline and a valve; and the detection and control device comprises thermocouples, a pressure sensor, a flame detector and a controller, a hot air outlet of a mixing chamber and a combustion chamber are respectively provided with the thermocouples, the pressure sensor and the flame detector are arranged on the combustion chamber, and the thermocouples, the pressure sensor and the flame detector are connected with the controller.
Description
Affiliated technical field
The present invention relates to a kind of blast furnace gas that is applied to and reclaim in the technology, make the system of the temperature rising of blast furnace gas.
Background technology
In the steel industry blast furnace ironmaking process, a large amount of coal gas that furnace roof is got rid of can be used as the fuel of hotblast stove, coke oven, process furnace etc.Because dustiness is bigger in the coal gas that the blast furnace furnace roof is discharged, therefore must carry out dust removal process to blast furnace gas.Because the temperature of blast furnace gas before entering sack cleaner be often lower, therefore be easy to generate the dewfall phenomenon and cause the dust bonding cloth bag, cause the sack cleaner cisco unity malfunction.At present on the blast furnace gas transport pipe, install interchanger additional the method for blast-furnace gas heating-up is solved for solving the dewfall phenomenon, generally adopting.Because interchanger can only indirect heating, therefore heat up and do not reach processing requirement more slowly.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of blast-furnace gas heating-up system, and this system not only makes blast-furnace gas heating-up fast, and can guarantee that the temperature of blast furnace gas reaches processing requirement before entering sack cleaner.
In order to solve the problems of the technologies described above, blast-furnace gas heating-up system of the present invention, it contains gas compressor, the high-pressure combustion stove, high-voltage ignition device, detect and control device, inside one end of described high-pressure combustion furnace shell is provided with the combustion chamber, the outside of this end of housing is provided with the blast furnace gas import, combustion air inlet, the cylindrical surface of this end of housing is provided with the aeration import, the other end of enclosure interior is mixing section and is provided with hot-blast outlet, the high-pressure combustion stove is provided with explosion trap, the import of gas compressor links to each other with the blast furnace gas transport pipe with valve through pipeline, the outlet of gas compressor links to each other with the blast furnace gas import of high-pressure combustion stove by pipeline, link to each other by pipeline between the aeration import of the import of gas compressor and high-pressure combustion stove, compressed air line links to each other by the combustion air inlet of relief valve with the high-pressure combustion stove, high-voltage ignition device is arranged on the high-pressure combustion stove and by pipeline and links to each other with compressed air line, the hot-blast outlet of mixing section links to each other with the blast furnace gas transport pipe with valve through pipeline, detection and control device contain thermopair, pressure transmitter, flame scanner and controller, the hot-blast outlet place and the combustion chamber of mixing section are equipped with described thermopair respectively, pressure transmitter and flame scanner are arranged on the combustion chamber, thermopair, pressure transmitter and flame scanner all link with controller.
Described high-voltage ignition device is high-pressure atomization oil gun or natural gas fired rifle.
During blast-furnace gas heating-up system work, high-voltage ignition device is ignition at first, after the inspection of flame scanner fire, coal gas in the blast furnace gas transport pipe is sent in the combustion chamber through press and burns with the air mixed of being sent into the combustion chamber by compressed air line, the high-temperature hot-air that produces flows out from the outlet of combustion chamber and enters mixing section, mix with the blast furnace gas that enters into mixing section from the import of high-pressure combustion furnace shell aeration, the temperature of high-temperature hot-air must be reduced, usually be not higher than 350 ℃, the high-temperature hot-air that temperature reduces enters the blast furnace gas transport pipe through pipeline from the hot-blast outlet of mixing section, mix with blast furnace gas in the blast furnace gas transport pipe, make that blast furnace gas temperature is elevated to more than the dew point in the blast furnace gas transport pipe, be generally between 100 ℃ to 125 ℃, thereby the temperature that has guaranteed blast furnace gas reaches processing requirement before entering sack cleaner.Blast furnace gas directly mixes with high-temperature hot-air, so heat-up rate is fast in the blast furnace gas transport pipe.
Description of drawings
Fig. 1 is the structural representation of the system that raises of the temperature of blast furnace gas of the present invention.
1. blast furnace gas transport pipes among the figure, 2. valve, 3. gas compressor, 4. blast furnace gas import, 5. combustion air inlet, 6. relief valve, 7. compressed air line, 8. high-voltage ignition device 9. exports 10, hot-blast outlet, 11. pipelines, 12. valves, 13. mixing section, 14. combustion chambers, 15. housings, 16. the aeration import, 17. pipelines, 18. pipelines.
Embodiment
Among Fig. 1, blast-furnace gas heating-up system, it contains gas compressor 3, high-pressure combustion stove, high-voltage ignition device 8, detection and control device, inside one end of the housing 15 of high-pressure combustion stove is provided with combustion chamber 14, the outside of housing 15 these ends is provided with blast furnace gas import 4, combustion air inlet 5, the cylindrical surface of housing 15 these ends is provided with aeration import 16, and the other end of housing 15 inside is mixing section 13 and is provided with hot-blast outlet 10.The high-pressure combustion stove is provided with explosion trap, and is not shown in the figures.The import of gas compressor 3 links to each other with blast furnace gas transport pipe 1 with valve 2 through pipeline 18, and the outlet of gas compressor 3 links to each other with the blast furnace gas import 4 of high-pressure combustion stove by pipeline.Link to each other by pipeline 17 between the aeration import 16 of the import of gas compressor 3 and high-pressure combustion stove.Compressed air line 7 links to each other with the combustion air inlet 5 of high-pressure combustion stove by relief valve 6.High-voltage ignition device 8 is arranged on the high-pressure combustion stove and by pipeline and links to each other with compressed air line 7.The hot-blast outlet 10 of mixing section links to each other with blast furnace gas transport pipe 1 with valve 12 through pipeline 11.Detection and control device contain thermopair, pressure transmitter, flame scanner and controller, the hot-blast outlet place 10 and the combustion chamber 14 of mixing section are equipped with described thermopair respectively, pressure transmitter and flame scanner are arranged on the combustion chamber 14, not shown in the figures, thermopair, pressure transmitter and flame scanner all link with controller.High-voltage ignition device 8 is high-pressure atomization oil gun or natural gas fired rifle.During blast-furnace gas heating-up system work, at first ignition of high-voltage ignition device 8, after the inspection of flame scanner fire, coal gas in the blast furnace gas transport pipe 1 is sent in the combustion chamber 14 through press 3 and burns with the air mixed of being sent into combustion chamber 14 by compressed air line 7, the high-temperature hot-air that produces from the combustion chamber 14 outlet 9 flow out and enter mixing section 13, the blast furnace gas that enters into mixing section 13 with aeration import 16 from high-pressure combustion furnace shell 15 mixes, the temperature of high-temperature hot-air must be reduced, usually be not higher than 350 ℃, the high-temperature hot-air that temperature reduces enters the blast furnace gas transport pipe 1 through pipeline 11 and valve 12 from the hot-blast outlet 10 of mixing section 13, mix with blast furnace gas in the blast furnace gas transport pipe 1, make that blast furnace gas temperature is elevated to more than the dew point in the blast furnace gas transport pipe 1, be generally between 100 ℃ to 125 ℃.Thereby the temperature that has guaranteed blast furnace gas reaches processing requirement before entering sack cleaner.Blast furnace gas directly mixes with high-temperature hot-air, so heat-up rate is fast in the blast furnace gas transport pipe 1.
Claims (2)
1. blast-furnace gas heating-up system, it is characterized in that: it contains gas compressor, the high-pressure combustion stove, high-voltage ignition device, detect and control device, inside one end of described high-pressure combustion furnace shell is provided with the combustion chamber, the outside of this end of housing is provided with the blast furnace gas import, combustion air inlet, the cylindrical surface of this end of housing is provided with the aeration import, the other end of enclosure interior is mixing section and is provided with hot-blast outlet, the high-pressure combustion stove is provided with explosion trap, the import of gas compressor links to each other with the blast furnace gas transport pipe with valve through pipeline, the outlet of gas compressor links to each other with the blast furnace gas import of high-pressure combustion stove by pipeline, link to each other by pipeline between the aeration import of the import of gas compressor and high-pressure combustion stove, compressed air line links to each other by the combustion air inlet of relief valve with the high-pressure combustion stove, high-voltage ignition device is arranged on the high-pressure combustion stove and by pipeline and links to each other with compressed air line, the hot-blast outlet of mixing section links to each other with the blast furnace gas transport pipe with valve through pipeline, detection and control device contain thermopair, pressure transmitter, flame scanner and controller, the hot-blast outlet place and the combustion chamber of mixing section are equipped with described thermopair respectively, pressure transmitter and flame scanner are arranged on the combustion chamber, thermopair, pressure transmitter and flame scanner all link with controller.
2. blast-furnace gas heating-up system according to claim 1 is characterized in that: described high-voltage ignition device is high-pressure atomization oil gun or natural gas fired rifle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910263095A CN101818220A (en) | 2009-12-16 | 2009-12-16 | Blast-furnace gas heating-up system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910263095A CN101818220A (en) | 2009-12-16 | 2009-12-16 | Blast-furnace gas heating-up system |
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| CN101818220A true CN101818220A (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910263095A Pending CN101818220A (en) | 2009-12-16 | 2009-12-16 | Blast-furnace gas heating-up system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371097A (en) * | 2011-10-20 | 2012-03-14 | 无锡市西漳环保设备有限公司 | Anti-dew-condensation heating dust removal device |
| CN102748855A (en) * | 2012-07-05 | 2012-10-24 | 中冶建筑研究总院有限公司 | Energy-saving vertical type coal dust hot-blast stove with double combustion nozzles |
| CN109385497A (en) * | 2018-11-21 | 2019-02-26 | 苏州大学 | A method of improving blast furnace top gas temperature in gravitational precipitator |
-
2009
- 2009-12-16 CN CN200910263095A patent/CN101818220A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371097A (en) * | 2011-10-20 | 2012-03-14 | 无锡市西漳环保设备有限公司 | Anti-dew-condensation heating dust removal device |
| CN102748855A (en) * | 2012-07-05 | 2012-10-24 | 中冶建筑研究总院有限公司 | Energy-saving vertical type coal dust hot-blast stove with double combustion nozzles |
| CN102748855B (en) * | 2012-07-05 | 2014-09-10 | 中冶建筑研究总院有限公司 | Energy-saving vertical type coal dust hot-blast stove with double combustion nozzles |
| CN109385497A (en) * | 2018-11-21 | 2019-02-26 | 苏州大学 | A method of improving blast furnace top gas temperature in gravitational precipitator |
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Open date: 20100901 |