CN101310027B - Tuvere tuyere of melter-gasifier - Google Patents

Tuvere tuyere of melter-gasifier Download PDF

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Publication number
CN101310027B
CN101310027B CN2007800000086A CN200780000008A CN101310027B CN 101310027 B CN101310027 B CN 101310027B CN 2007800000086 A CN2007800000086 A CN 2007800000086A CN 200780000008 A CN200780000008 A CN 200780000008A CN 101310027 B CN101310027 B CN 101310027B
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CN
China
Prior art keywords
tuyere
injection
tube
fine coal
melting gasifier
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.)
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Application number
CN2007800000086A
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Chinese (zh)
Other versions
CN101310027A (en
Inventor
崔應洙
裴辰燦
姜聲泰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Co Ltd
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Posco Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to KR10-2006-0101299 priority Critical
Priority to KR1020060101299A priority patent/KR100803990B1/en
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Priority to PCT/KR2007/000931 priority patent/WO2008047979A1/en
Publication of CN101310027A publication Critical patent/CN101310027A/en
Application granted granted Critical
Publication of CN101310027B publication Critical patent/CN101310027B/en
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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/16Tuyéres
    • C21B7/163Blowpipe assembly
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/16Introducing a fluid jet or current into the charge
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/18Charging particulate material using a fluid carrier
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00Subject matter not provided for in other groups of this subclass
    • F27D99/0001Heating elements or systems
    • F27D99/0033Heating elements or systems using burners

Abstract

An injection tuyere of a melter-gasifier according to the present invention includes a tuyere body, an opening for injecting oxygen that is formed to penetrate a center portion of the tuyere body, a cooling tube that is formed in the tuyere body, a fine coal injection tube that is formed to penetrate the tuyere body away from the opening for injecting oxygen, and a protection tube that is formed to surround the fine coal injection tube.

Description

The air port of melting gasifier
Technical field
The present invention relates to the injection tuyere of melting gasifier.More specifically, the present invention relates in the iron manufacturing process of making molten iron by iron ore, will to comprise that the various fuel of fine coal or raw material are injected into the injection tuyere of melting gasifier wherein with gaseous state or liquid oxygen.
Background technology
Usually, a plurality of air ports along the circumferential direction are installed in the outside surface of downside that is used for being made by iron ore the melting gasifier of molten iron, and the molten iron manufacturing is the part as the iron work iron manufacturing process.Oxygen and steam is injected into by the air port iron ore is packed in wherein the melting gasifier.
The tail end in air port is connected to an oxygen lance that oxygen is provided, and the air port is also connected to the steam blast Guan Yixiang melting gasifier that is provided with close/open valve steam and pure oxygen are provided.
Therefore, be injected into pure oxygen and the steam in the melting gasifier and chemical reaction takes place for the coal seam that is filled in the melting gasifier by oxygen lance and steam blast pipe, and therefore produce heat and reducing gas.
In this case, infeed patch fuel or raw material to melting gasifier usually.Yet, consider the economic worth of production, be necessary fuel and raw material such as the microgranular or liquid form of fine coal are injected to melting gasifier.
Simultaneously, when making molten iron by the use blast furnace, inject fine coal by the fine coal injection tube that is installed in channel middle to blast furnace, warm air (having about 1000 ℃ of pyritous air) by described passage with mixing that promotes fine coal and warm air thereby the efficiency of combustion that improves blast furnace.
Yet, under the situation of the melting gasifier that aforesaid method is applied to wherein inject pure oxygen, because fine coal fully burnt before the air port, so may damage the phenomenon in air port.Therefore, it is very difficult fine coal and pure oxygen being injected in the melting gasifier together.
In order to address the above problem, to disclose in 2002-0032674 number the Korean Patent communique and a kind ofly fine coal has been injected into the structure that melting gasifier injects fine coal and oxygen by using another passage to pass the air port.
In above-mentioned disclosed structure, when being injected into fine coal in the melting gasifier, using such as the transport gas quick (from 30 meter per second to 50 meter per seconds) of nitrogen fine coal is transmitted by fine coal injection tube by fine coal injection tube.
Simultaneously, in said process, the fine coal particle collision pulverized coal injection tube wall that is transmitted, so this wall is continued wearing and tearing.
That is to say that the kinetic energy of the fine coal particulate that is transmitted is converted into impact energy, and the fatigue of the pipe of therefore jetting accumulated, finally caused the pulverized coal injection tracheal rupture.
As mentioned above, if the pulverized coal injection tracheal rupture, fine coal is with regard to the direct impact tuyere body so.Therefore, owing to tuyere body is normally made by not wear-resistant and ballistic material, so fine coal can make it break easily.
In addition, as mentioned above, in the time of the tuyere body disruptive, enter melting gasifier at the water coolant of tuyere body internal recycle by the part of breaking, and therefore may cause the blast in the melting gasifier.
Summary of the invention
Technical problem
The present invention is designed for and addresses the above problem, and the injection tuyere that the purpose of this invention is to provide a kind of melting gasifier with prevent aforesaid may be because the blast in the melting gasifier that the inflow water coolant causes.In addition, another object of the present invention is to prevent that tuyere body from breaking and therefore prolong the life-span of injection tuyere.
Technical scheme
To achieve these goals; injection tuyere according to melting gasifier of the present invention comprises tuyere body, is configured as the opening that is used for injecting oxygen at the middle part of running through tuyere body, by configuration at the cooling tube of tuyere body, be configured as away from the opening that is used to inject oxygen and run through the fine coal injection tube of tuyere body, and be configured as protective tube around fine coal injection tube.
In this case, protective tube can extend to the outside of the tail end of tuyere body, can be provided with sleeve pipe at an end of protective tube, and fine coal injection tube insert wherein conduit can with this thimble joint.
In addition, protective tube can be made by wear-resistant high carbon steel.
In addition, cooling tube may further include the cooling water body chamber that is used for the cooling air port body, the nose cooling water tube that is used for the cooling air port front end, and is inserted in the sidewall between cooling water body chamber and the nose cooling water tube.
In this case, sidewall can be made of copper.
Beneficial effect
In injection tuyere according to melting gasifier of the present invention, in the time of the fine coal injection tube disruptive, can be easy to it is removed from protective tube, therefore only need to change fine coal injection tube.Therefore, expensive injection tuyere can be used for a long time.
In addition, water coolant is prevented from entering melting gasifier, so melting gasifier steady operation for a long time.
Description of drawings
Fig. 1 is the sectional view of the injection tuyere of melting gasifier according to an embodiment of the invention.
Fig. 2 is the end view of the injection tuyere of melting gasifier according to an embodiment of the invention.
Fig. 3 is the sectional view that the part of the injection tuyere of melting gasifier according to an embodiment of the invention sections.
Fig. 4 is the synoptic diagram of embodiment that is provided with the melting gasifier of injection tuyere according to an embodiment of the invention.
Embodiment
Those of ordinary skill in the art below with reference to accompanying drawings the preferred embodiments of the invention described so that can realize the present invention.Embodiment only is that explanation the present invention is limited to these embodiments with the present invention.
Fig. 1 is the sectional view according to the injection tuyere of the melting gasifier of embodiment of the present invention, and Fig. 2 is the end view from the tail end 10b observation of injection tuyere.
As shown in Figure 1, be used to jet opening, cooling water body chamber 30 and the nose cooling water tube 40 of oxygen 20 according to what the injection tuyere 100 of embodiment of the present invention comprised the middle part that is formed on tuyere body 10.
In addition, injection tuyere 100 be provided with the fine coal injection tube 50 that can supply microgranular or liquid fuel that comprises fine coal and raw material and around and protect the protective tube 60 of the fine coal injection tube 50 in the tuyere body 10.
Tuyere body 10 can be made of copper with high heat exchanging efficiency.In this case, from the front end 10a of tuyere body 10 extend to insertion portion, the outside surface of length range from 100mm to 150mm can coat pottery, and be destroyed with the outside surface of the front end 10a of the tuyere body 10 that prevents to place melting gasifier.
Fine coal injection tube 50 can be arranged as with a predetermined inclination on the outside surface of tuyere body 10 next door, preferably, this inclination angle becomes the angle of spending in the 10 degree scopes from 7 for the medullary ray P with respect to the opening of winding-up oxygen 20.
Protective tube 60 can be made by the wear-resistant material such as high carbon steel, to prevent that tuyere body 10 is broken when fine coal injection tube 50 is worn and torn by fine coal.
As shown in Figure 1, protective tube 60 is configured as the outside of the tail end 10b that gives prominence in tuyere body 10, and sleeve pipe 70 can be installed in the end of outstanding protective tube 60.
Sleeve pipe 70 combines with conduit 80, and the external diameter of this conduit 80 is greater than the external diameter of the fine coal injection tube 50 among the tail end 10b of tuyere body 10, and therefore can easily fine coal injection tube 50 be inserted tuyere body 10.
In addition, as shown in Figure 2, cooling water body chamber 30 and nose cooling water tube 40 are connected respectively to water-supply pipe 30a and 40a and water shoot 30b and 40b, so water coolant circulates in tuyere body 10.
Protective tube 60 has and is installed to be the body that runs through injection tuyere 100 and avoids cooling off water body chamber 30 and be arranged in the structure of the passage of injection tuyere 100.
Fig. 3 is the sectional view that the part according to the injection tuyere of the melting gasifier of embodiment of the present invention sections.As shown in Figure 3, sidewall 90 is arranged between cooling water body chamber 30 and the nose cooling water tube 40.
Because protective tube 60 is by the tuyere body 10 of above-mentioned sidewall 90 insertion injection tuyere 100, so protective tube 60 directly is not exposed to cooling-water duct.Above-mentioned sidewall 90 can be made of copper.
Fig. 4 is the synoptic diagram of the embodiment of melting gasifier.A plurality of injection tuyere 100 are arranged in the outside surface of the bottom of melting gasifier 200 with fixed spacing, carry out the process of making molten iron then.
In this case, oxygen and hot steam are injected into by the injection tuyere 100 that is installed in the melting gasifier 200, are loaded in it as the massive iron ore of raw material and the coal that acts as a fuel in this melting gasifier 200.
Therefore, form the combustion zone in the place ahead, end of injection tuyere 100, raw material melts in this combustion zone, thereby produces molten iron.
In addition, as mentioned above, provide raw material such as fine coal by the fine coal injection tube that in the tuyere body of each injection tuyere 100, is provided with, even and in fine coal injection tube because fine coal high speed impact and under the disruptive situation, protective tube can also be protected tuyere body.
Although above described exemplary of the present invention in detail, but it should be clearly understood that, a lot of remodeling of the basic inventive principle of being instructed in this specification sheets and/or variant still fall in the spirit and scope of the invention, and this purport and scope such as appending claims and equivalent thereof limit.

Claims (6)

1. the injection tuyere of a melting gasifier, this injection tuyere comprises:
Tuyere body;
Be used to inject the opening of oxygen, described opening is configured as the middle part of running through tuyere body;
By the cooling tube of configuration in described tuyere body;
Fine coal injection tube, it is configured as away from described and is used to inject the opening of oxygen and runs through tuyere body; And
Protective tube, it is configured as around described fine coal injection tube.
2. injection tuyere according to claim 1, wherein said protective tube extends to the outside of the tail end of tuyere body.
3. injection tuyere according to claim 2, wherein the end at described protective tube is provided with sleeve pipe, and fine coal injection tube is inserted wherein conduit and described thimble joint.
4. injection tuyere according to claim 1, wherein said protective tube is made by high carbon steel.
5. injection tuyere according to claim 1, wherein said cooling tube also comprises:
The cooling water body chamber that is used for the cooling air port body;
The nose cooling water tube that is used for the cooling air port front end; And
Be inserted in the sidewall between cooling water body chamber and the nose cooling water tube.
6. injection tuyere according to claim 5, wherein said sidewall is made of copper.
CN2007800000086A 2006-10-18 2007-02-22 Tuvere tuyere of melter-gasifier Active CN101310027B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR10-2006-0101299 2006-10-18
KR1020060101299A KR100803990B1 (en) 2006-10-18 2006-10-18 Tuvere tuyere of melter-gasifier
PCT/KR2007/000931 WO2008047979A1 (en) 2006-10-18 2007-02-22 Tuyere of melter-gasifier

Publications (2)

Publication Number Publication Date
CN101310027A CN101310027A (en) 2008-11-19
CN101310027B true CN101310027B (en) 2010-11-10

Family

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Family Applications (1)

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KR (1) KR100803990B1 (en)
CN (1) CN101310027B (en)
WO (1) WO2008047979A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101142720B1 (en) 2009-12-30 2012-05-04 재단법인 포항산업과학연구원 Bed bunner attached to fluidized reduction furnace of FINEX process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87100352A (en) * 1987-01-21 1988-08-03 冶金工业部钢铁研究总院 Coverter pig coal oxygen injection lance and protection technology thereof
CN88100068A (en) * 1987-01-09 1988-08-24 日本钢管株式会社 Blast-furnace tuyere
LU88004A1 (en) * 1990-09-21 1992-06-01 Centre Rech Metallurgique Device for the massive injection of fuel and wind in a blast furnace
CN1084567A (en) * 1993-10-09 1994-03-30 冶金工业部钢铁研究总院 Blast furnace is with oxy coal burner and guard method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2901998B2 (en) * 1989-07-24 1999-06-07 川崎製鉄株式会社 How to inject pulverized coal into the blast furnace
EP0576869B1 (en) * 1992-07-01 1998-11-11 Paul Wurth S.A. Apparatus for injecting pulverized coal into a blast furnace
KR100510829B1 (en) * 2000-10-26 2005-08-30 주식회사 포스코 tuyere for injecting fine ore and liquid fuel into meltergasifier
KR100711435B1 (en) * 2001-04-09 2007-04-24 주식회사 포스코 Lance for injecting pulverized coal
KR100782684B1 (en) * 2001-07-10 2007-12-07 주식회사 포스코 A pulverized solid fuel injecting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN88100068A (en) * 1987-01-09 1988-08-24 日本钢管株式会社 Blast-furnace tuyere
CN87100352A (en) * 1987-01-21 1988-08-03 冶金工业部钢铁研究总院 Coverter pig coal oxygen injection lance and protection technology thereof
LU88004A1 (en) * 1990-09-21 1992-06-01 Centre Rech Metallurgique Device for the massive injection of fuel and wind in a blast furnace
CN1084567A (en) * 1993-10-09 1994-03-30 冶金工业部钢铁研究总院 Blast furnace is with oxy coal burner and guard method

Also Published As

Publication number Publication date
CN101310027A (en) 2008-11-19
KR100803990B1 (en) 2008-02-15
WO2008047979A1 (en) 2008-04-24

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