CN2910948Y - Sheath-like, water circulation chimney at converter mouth of evaporated cooling flue of steelmaking converter - Google Patents
Sheath-like, water circulation chimney at converter mouth of evaporated cooling flue of steelmaking converter Download PDFInfo
- Publication number
- CN2910948Y CN2910948Y CNU200620073682XU CN200620073682U CN2910948Y CN 2910948 Y CN2910948 Y CN 2910948Y CN U200620073682X U CNU200620073682X U CN U200620073682XU CN 200620073682 U CN200620073682 U CN 200620073682U CN 2910948 Y CN2910948 Y CN 2910948Y
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- flue
- converter
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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
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a converter mouth fixed segment flue of evaporated cooling flue for sword sheath type water circulation steelmaking converter, and is used to recover the residual heat generated by converter steel making. The converter mouth fixed segment flue is provided with an oxygen lance port and a feeding port, and characterized in that the heated pipe(21) of the oxygen lance port and the feeding port comprises an internal pipe (22) and an external pipe (23), the internal pipe(22) is sheathed by the external pipe (23) outside, the cooling water enters from the internal pipe (22) and cycles to the external pipe (23) for water exiting, each heated pipe forms an indvdl loop. So each heated pipe is an single loop, the water can be cooled completely so as to increase the service life of the oxygen lance port and the feeding port from half an year to about one year and a half.
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 mouth fixed section flue of scabbard formula water cycle 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.
The mouth fixed section flue of above-mentioned gasification cooling flue mainly has the following disadvantages:
Mouth fixed section oxygen muzzle and charging opening water-cooling pattern generally have two kinds: board-like and tubular type, see Fig. 3,4 respectively.Plank frame is that steel plate is rolled into inside and outside cover, middle is separated into circulation loop with water-stop sheet, and water coolant is at the chuck internal recycle, and shortcoming is that the gap of water-stop sheet and overcoat can't be welded, and goes here and there water easily, causes the short circuit in water route.Tubular structure is the lower collecting box water inlet, is assigned to heat pipe, is pooled to the upper header water outlet again, and shortcoming also is to distribute inequality.Therefore mouth fixed section flue work-ing life of the gasification cooling flue of above two kinds of water-cooling patterns short, only be about half a year.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of mouth fixed section flue of scabbard formula water cycle gasification cooling flue for steel-making converter of long service life is provided.
The purpose of this utility model is achieved in that a kind of mouth fixed section flue of scabbard formula water cycle gasification cooling flue for steel-making converter, offer aerobic muzzle and charging opening on the mouth fixed section flue, it is characterized in that: the heat pipe of described charging opening and oxygen muzzle is made up of interior pipe and outer tube two portions, outer tube is placed in outside the interior pipe, water coolant is circulated to the outer tube water outlet from interior water inlet tube.Every heat pipe all is an independent loop like this, and water cooling is abundant, and bring up to about a year and a half about by original half a year the work-ing life that makes oxygen muzzle and charging opening.
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 oxygen muzzle and the board-like water-cooling pattern structural representation of charging opening in the past.
Fig. 4 is oxygen muzzle and a charging opening tubular type water-cooling pattern structural representation in the past.
Fig. 5 is oxygen muzzle of the present utility model and charging opening scabbard formula water-cooling pattern structural representation.
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, heat pipe 21, interior pipe 22, outer tube 23.
Embodiment:
Referring to Fig. 5, the mouth fixed section flue of the utility model scabbard formula water cycle gasification cooling flue for steel-making converter, offer aerobic muzzle and charging opening on the mouth fixed section flue, the heat pipe 21 of described charging opening and oxygen muzzle is made up of interior pipe 22 and outer tube 23 two portions, manage outside 22 in outer tube 23 is placed in, water coolant is circulated to outer tube water outlet 23 from interior pipe 22 water inlets, and every heat pipe 21 forms an independent loop.
Claims (1)
1, a kind of mouth fixed section flue of scabbard formula water cycle gasification cooling flue for steel-making converter, offer aerobic muzzle and charging opening on the mouth fixed section flue, it is characterized in that: the heat pipe (21) of described charging opening and oxygen muzzle is made up of interior pipe (22) and outer tube (23) two portions, outer tube (23) is placed in outside the interior pipe (22), water coolant is intake from interior pipe (22), be circulated to outer tube water outlet (23), every heat pipe (21) forms an independent loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620073682XU CN2910948Y (en) | 2006-06-12 | 2006-06-12 | Sheath-like, water circulation chimney at converter mouth of evaporated cooling flue of steelmaking converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620073682XU CN2910948Y (en) | 2006-06-12 | 2006-06-12 | Sheath-like, water circulation chimney at converter mouth of evaporated cooling flue of steelmaking converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2910948Y true CN2910948Y (en) | 2007-06-13 |
Family
ID=38132807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620073682XU Expired - Lifetime CN2910948Y (en) | 2006-06-12 | 2006-06-12 | Sheath-like, water circulation chimney at converter mouth of evaporated cooling flue of steelmaking converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2910948Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109576436A (en) * | 2018-12-26 | 2019-04-05 | 苏州海陆重工股份有限公司 | Compulsory circulative cooling flue |
| WO2023138040A1 (en) * | 2022-01-20 | 2023-07-27 | 中冶南方工程技术有限公司 | Flue of converter waste heat boiler |
-
2006
- 2006-06-12 CN CNU200620073682XU patent/CN2910948Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109576436A (en) * | 2018-12-26 | 2019-04-05 | 苏州海陆重工股份有限公司 | Compulsory circulative cooling flue |
| CN109576436B (en) * | 2018-12-26 | 2024-01-26 | 苏州海陆重工股份有限公司 | Forced circulation cooling flue |
| WO2023138040A1 (en) * | 2022-01-20 | 2023-07-27 | 中冶南方工程技术有限公司 | Flue of converter waste heat boiler |
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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 |