CN2910952Y - Forced circulation type evaporated cooling flue of steelmaking converter - Google Patents
Forced circulation type evaporated cooling flue of steelmaking converter Download PDFInfo
- Publication number
- CN2910952Y CN2910952Y CNU2006200736868U CN200620073686U CN2910952Y CN 2910952 Y CN2910952 Y CN 2910952Y CN U2006200736868 U CNU2006200736868 U CN U2006200736868U CN 200620073686 U CN200620073686 U CN 200620073686U CN 2910952 Y CN2910952 Y CN 2910952Y
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- Prior art keywords
- flue
- converter
- mouth fixed
- gas
- gas hood
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model relates to a forced cycling type vaporizing cooling flue used in steelmaking converter, the vaporizing cooling flue is used for recovering the residual heat generated by converter steel making. The vaporizing cooling flue includes a movable chimney hood (14), a furnace mouth fixed segment flue (15), an intermediate regime flue (17) and a terminal flue (18), the movable chimney hood(14) is provided above the converter, the movable chimney hood (14), the furnace mouth fixed segment flue(15), the intermediate regime flue (17) and the terminal flue (18) are connected in turn, the vaporizing cooling flue is characterized in that the cycling water loop between the lower interconnecting box (24) and the bubble (23) of the movable chimney hood (14) and the furnace mouth fixed segment flue (15) is added with a circulating pump (25). The utility model changes natural cycle to forced cycle, which makes the flowing water of the pipe be sufficient all the time and meets the demand of cooling and evaporating.
Description
Technical field:
The utility model relates to a kind of gasification cooling flue for steel-making converter, is specifically related to a kind of forced cyclic type gasification cooling flue for steel-making converter.Belong to the oxygen top blown converter steel making equipment technical field.
Background technology:
Linz-Donawitz process is nearest more than 50 years a kind of steel-smelting technologies that produce and grow up.It does not need outer heat supplied, is the carbon that utilizes in the molten iron self, closes with the technical pure oxidation, produces heat, for the needs of steel-making.Oxygen from the converter mouth top, is deep into the top suitable position of molten iron in the converter by the oxygen rifle, blows.In converting process, the oxide compound of iron and the carbide in the molten iron produce a large amount of carbon monoxide, emit a large amount of heats simultaneously.The gas of ejection is called furnace gas, and major ingredient is carbon monoxide (86～90%) and carbonic acid gas (about 10%).The temperature of furnace gas in stove is at 1400 ℃～1600 ℃.
Owing in steelmaking process, produce a large amount of coal gas of converter (carbon monoxide), generally all adopt gasification cooling flue and dust removal installation to produce steam and recovery coal gas, its technical process such as Fig. 1, converter gas borrows blower fan suction to enter gasification cooling flue, the recovery part fume afterheat, the flue gas that comes out from gasification cooling flue enters overflow Venturi meter dedusting cooling from top, the path transfer Venturi meter that enters the bottom after the elbow separator dehydration carries out smart dedusting, gas after dedusting is dewatered by elbow separator, purified gas, enters gas storage holder and stores by three-way switch valve by blower fan pressurization back.In total system, main device is made up of converter, gasification cooling flue and dust removal installation.Gasification cooling flue is a converter top cooling down high-temperature flue gas to 800 ℃～1000 ℃, produces steam, reaches the purpose of waste heat recovery.Be the reliable passage that reclaims coal gas simultaneously.Coal gas to 70 ℃～80 ℃ is further cooled off in mainly acting as by the method for water spray of dust removal installation, purifies coal gas simultaneously, stores coal gas.At the fire door place, flue-gas temperature is approximately 1400 ℃～1600 ℃, and temperature out is approximately 800 ℃～1000 ℃ after the flue cooling, and flue gas enters the overflow Venturi meter, and temperature is reduced to 70 ℃～80 ℃ rapidly in 1/50 second, removes the big particle in the flue dust simultaneously.Cooled smoke enters the path transfer Venturi meter after the elbow separator dehydration, the path transfer Venturi meter can be adjusted the aditus laryngis cross section according to the minute-pressure difference that flue fire door place records, thereby the control flue gas flow keeps within the specific limits.Flue gas cooling and smart dedusting once more in the path transfer Venturi meter simultaneously.Reclaim when requiring when gas quality meets, coal gas enters gas chamber by water seal reverse checkvalve and V-type water seal and stores.
The action principle of gasification cooling flue is: high-temperature flue gas is by gasification cooling flue, and because of the heating surface temperature is lower, high-temperature flue gas is passed to the heating surface cooling with the heat energy of self.Water in the heating surface tube because of having absorbed the evaporation of flue gas heat energy part, produces steam.Because water is constantly circulation in heating surface tube, has cooled off heating surface, and has made metal not overheated.Adopt gasification cooling flue, not only can reach the purpose of cooled flue gas, simultaneously again can production vapor recovery heat, for the production and the life use of factory.
Gasification cooling flue is made up of movable gas hood, mouth fixed section, interlude flue and flue latter end, and its structure as shown in Figure 2.Movable gas hood is generally pipe iris type structure above the fire door of converter.Movable gas hood needs the easy on and off lifting, to guarantee the petticoat pipe inner and outer air pressure about equally, both avoided escaping of flue gas to worsen the flushing and casting environment, and also do not sucked too much air and reduce the quality that reclaims coal gas, therefore each the stage movable gas hood in blowing can be adjusted to the gap that needs.Finishing blowing taps, when slagging tap, adding steel scrap, hot metal charging, petticoat pipe can rise, and does not hinder converter inclining.When needs were changed furnace lining, movable gas hood can be translated apart the body of heater top again.Movable gas hood generally has circulation loop of one's own.Movable gas hood top is mouth fixed section flue, adopts water seal to be connected between movable flue and the mouth fixed section usually, to reach the purpose of sealing.
Mouth fixed section, operating mode are abominable relatively.This section is generally pipe dividing plate form.Oxygen muzzle, charging opening are arranged on this section.The lower collecting box of mouth fixed section is generally heating surface, and periodic flame impingement lower collecting box makes the operating mode of lower collecting box more abominable.
Middle flue section is generally oblique straight section etc., comprises all flues of flue gas ascent stage.At present big portion is a pipe iris type structure.
The flue latter end is the flue gas downcomer.Mainly be for easy to connect with the rear portion dust removal installation.
Under the heating cycle stable case, it is stable that flow operating mode also reaches gradually.At this moment, the working medium in the upcast is in the two-phase state of steam water interface, and the downtake inboard is monophasic water, perhaps is the big two phase fluid of steam quality and be the less two phase fluid of steam quality in the downtake in the upcast.After the two phase fluid that comes from upcast separated through carbonated drink, saturated vapor went to the air space of upper drum, saturation water then the hydrospace by upper drum back into downtake, thereby form circulating of water, as Fig. 3.
The movable gas hood and the mouth fixed section flue of above-mentioned gasification cooling flue mainly have the following disadvantages:
Movable gas hood is near fire door, and operating mode is abominable, and heating surface is short.Heat pipe adopts the reaction of nature water cycle power slow, and relatively poor in blowing initial stage water power, pipe often can not get reliable cooling.Therefore the work-ing life of movable gas hood is all about half a year.
When bessemerizing more than the 80t, the instantaneous heat load is very big, and when beginning to blow, moment produces a large amount of high-temperature flue gas especially, and heat pipe adopts traditional natural circulation, and the mobile cooling of the water in the pipe does not reach the requirement of evaporation, makes flue often produce fatigure failure.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and makes that in-pipe flow is moving to remain competent forced cyclic type gasification cooling flue for steel-making converter.
The purpose of this utility model is achieved in that a kind of forced cyclic type gasification cooling flue for steel-making converter, comprise: movable gas hood, mouth fixed section flue, interlude flue and latter end flue, movable gas hood places the converter top, movable gas hood, mouth fixed section flue, interlude flue and latter end flue are linked in sequence successively, it is characterized in that: addition one recycle pump in the circulating water loop between the bubble of movable gas hood and mouth fixed section flue and the lower collecting box.
It is pump circulation that the utility model changes natural circulation, in-pipe flow is moved remain abundance, has satisfied the requirement of cooling evaporation.
Description of drawings:
Fig. 1 produces steam and reclaims the gas process schema for adopting gasification cooling flue and dust removal installation.
Fig. 2 is a gasification cooling flue Facad structure synoptic diagram.
Fig. 3 is movable gas hood of the present utility model and mouth fixed section flue circulating water loop synoptic diagram.
Fig. 4 is a mouth fixed section flue circulating water loop synoptic diagram of the present utility model.
Among the figure: steel-making converter 1, gasification cooling flue 2, overflow Venturi meter 3, elbow separator 4, path transfer Venturi meter 5, elbow separator 6, blower fan 7, by-pass valve 8, T-valve 9, chimney 10, water seal reverse checkvalve 11, V-type water seal 12, gas chamber 13, movable gas hood 14, mouth fixed section flue 15, the flexible coupling device 16 of sealing, interlude flue 17, latter end flue 18, charging opening 19, oxygen muzzle 20, upcast 21, downtake 22, drum 23, lower collecting box 24, recycle pump 25, upper header 26.
Embodiment:
Referring to Fig. 4, the utility model forced cyclic type gasification cooling flue for steel-making converter, by movable gas hood 14, mouth fixed section flue 15, interlude flue 17 and latter end flue 18, movable gas hood 14 places the converter top, and movable gas hood 14, mouth fixed section flue 15, interlude flue 17 and latter end flue 18 are linked in sequence successively.Addition one recycle pump 25 in the bubble 23 of movable gas hood 14 and mouth fixed section flue 15 and the circulation loop between the lower collecting box 24.
Claims (1)
1, a kind of forced cyclic type gasification cooling flue for steel-making converter, comprise: movable gas hood (14), mouth fixed section flue (15), interlude flue (17) and latter end flue (18), movable gas hood (14) places the converter top, movable gas hood (14), mouth fixed section flue (15), interlude flue (17) and latter end flue (18) are linked in sequence successively, it is characterized in that: addition one recycle pump (25) in the last bubble (23) of described movable gas hood (14) and mouth fixed section flue (15) and the circulating water loop between the lower collecting box (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200736868U CN2910952Y (en) | 2006-06-12 | 2006-06-12 | Forced circulation type evaporated cooling flue of steelmaking converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200736868U CN2910952Y (en) | 2006-06-12 | 2006-06-12 | Forced circulation type evaporated cooling flue of steelmaking converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2910952Y true CN2910952Y (en) | 2007-06-13 |
Family
ID=38132811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200736868U Expired - Lifetime CN2910952Y (en) | 2006-06-12 | 2006-06-12 | Forced circulation type evaporated cooling flue of steelmaking converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2910952Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476015B (en) * | 2008-01-02 | 2010-09-01 | 中冶京诚工程技术有限公司 | AOD converter flue gas waste heat recovery apparatus |
| CN112680560A (en) * | 2020-12-08 | 2021-04-20 | 苏州海陆重工股份有限公司 | Waste heat boiler in converter dry dedusting system |
| CN114480779A (en) * | 2021-11-15 | 2022-05-13 | 中国科学院力学研究所 | Scattered air inlet combustion device for coal gas front combustion and rear combustion of steel converter |
| CN115323103A (en) * | 2022-08-11 | 2022-11-11 | 河北天越激光再制造科技有限公司 | Novel steelmaking converter vaporization cooling equipment and cooling process |
-
2006
- 2006-06-12 CN CNU2006200736868U patent/CN2910952Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476015B (en) * | 2008-01-02 | 2010-09-01 | 中冶京诚工程技术有限公司 | AOD converter flue gas waste heat recovery apparatus |
| CN112680560A (en) * | 2020-12-08 | 2021-04-20 | 苏州海陆重工股份有限公司 | Waste heat boiler in converter dry dedusting system |
| CN112680560B (en) * | 2020-12-08 | 2022-04-15 | 苏州海陆重工股份有限公司 | Waste heat boiler in converter dry dedusting system |
| CN114480779A (en) * | 2021-11-15 | 2022-05-13 | 中国科学院力学研究所 | Scattered air inlet combustion device for coal gas front combustion and rear combustion of steel converter |
| CN115323103A (en) * | 2022-08-11 | 2022-11-11 | 河北天越激光再制造科技有限公司 | Novel steelmaking converter vaporization cooling equipment and cooling process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070613 |
|
| EXPY | Termination of patent right or utility model |