CN2910953Y - Flow-guiding structure type chimney fixed at converter mouth of steelmaking converter evaporated cooling flue - Google Patents
Flow-guiding structure type chimney fixed at converter mouth of steelmaking converter evaporated cooling flue Download PDFInfo
- Publication number
- CN2910953Y CN2910953Y CNU2006200736872U CN200620073687U CN2910953Y CN 2910953 Y CN2910953 Y CN 2910953Y CN U2006200736872 U CNU2006200736872 U CN U2006200736872U CN 200620073687 U CN200620073687 U CN 200620073687U CN 2910953 Y CN2910953 Y CN 2910953Y
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- Prior art keywords
- flue
- converter
- mouth fixed
- gas
- flow
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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 diversion structure type furnace mouth fixed segment flue of the vaporizing cooling flue used in steelmaking converter, which is used for recovering the residual heat when steel making. The diversion structure type furnace mouth fixed segment flue is characterized in that it is provided with a baffle(24) axially in the heated pipe(23) in the range of 120 DEG above the furnace mouth fixed segment flue inflection point of the vaporizing cooling flue, the baffle(24) is made to a helical shape. The working fluid spirally rises along the baffle in the heated pipe with an increased speed, which brings the steam bubble adhered to the pipe wall away promptly and prevents the steam-water layered phenomenon.
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 flow-guiding structure formula mouth fixed section flue of 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:
Horizontally disposed or when too small, if refrigerant flow rate is low excessively in the pipe, the separation of two phenomenon will occur with horizontal plane angle when flue, promptly steam flows on pipe top, and water flows in the pipe bottom, and tangible separation surface appears in carbonated drink two-phase sometimes, as Fig. 3.When separation of two flowed, the unlikely overtemperature of water cooling was arranged at the pipe bottom, and pipe top does not have the moisture film cooling, may cause overtemperature, and pipe explosion accident easily takes place.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of flow-guiding structure formula mouth fixed section flue that can prevent the gasification cooling flue for steel-making converter of separation of two in the heat pipe is provided.
The purpose of this utility model is achieved in that a kind of flow-guiding structure formula mouth fixed section flue of gasification cooling flue for steel-making converter, it is characterized in that it is that the inner axial tube that is heated in 120 ° of scopes adds flow deflector more than the mouth fixed section flue flex point of gasification cooling flue, this flow deflector is made into spirrillum.Working medium rises along the flow deflector spiral in heat pipe, and the flow velocity quickening, in time takes away attached to the steam bubble on the tube wall, prevents the generation of separation of two phenomenon.When carbonated drink was flowed, all there is the unlikely overtemperature of water cooling the pipe upper and lower part, and was safe and reliable.
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 the mouth fixed section flue cross sectional representation of gasification cooling flue in the past.
Fig. 4 is a separation of two synoptic diagram in the past the mouth fixed section flue heat pipe.
Fig. 5 arranges the flow deflector synoptic diagram in the heat pipe 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, high-temperature flue gas 21, steam bubble 22, heat pipe 23, flow deflector 24.
Embodiment:
Referring to Fig. 5, the flow-guiding structure formula mouth fixed section flue of the utility model gasification cooling flue for steel-making converter, it is axially to add flow deflector 24 in the heat pipe 23 in 120 ° of scopes more than the mouth fixed section flue flex point of gasification cooling flue, this flow deflector 24 is made into spirrillum, working medium rises along the flow deflector spiral in heat pipe, and the flow velocity quickening, in time take away attached to the steam bubble on the tube wall, prevent the generation of separation of two phenomenon.
Claims (1)
1, a kind of flow-guiding structure formula mouth fixed section flue of gasification cooling flue for steel-making converter, it is characterized in that it is axially to add flow deflector (24) in the heat pipe (23) in 120 ° of scopes more than the mouth fixed section flue flex point of gasification cooling flue, this flow deflector (24) is made into spirrillum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200736872U CN2910953Y (en) | 2006-06-12 | 2006-06-12 | Flow-guiding structure type chimney fixed at converter mouth of steelmaking converter evaporated cooling flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200736872U CN2910953Y (en) | 2006-06-12 | 2006-06-12 | Flow-guiding structure type chimney fixed at converter mouth of steelmaking converter evaporated cooling flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2910953Y true CN2910953Y (en) | 2007-06-13 |
Family
ID=38132812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200736872U Expired - Lifetime CN2910953Y (en) | 2006-06-12 | 2006-06-12 | Flow-guiding structure type chimney fixed at converter mouth of steelmaking converter evaporated cooling flue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2910953Y (en) |
-
2006
- 2006-06-12 CN CNU2006200736872U patent/CN2910953Y/en not_active Expired - Lifetime
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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 |