CN102485914A - Peep hole coal injection device for blast furnace - Google Patents
Peep hole coal injection device for blast furnace Download PDFInfo
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- CN102485914A CN102485914A CN2010105712752A CN201010571275A CN102485914A CN 102485914 A CN102485914 A CN 102485914A CN 2010105712752 A CN2010105712752 A CN 2010105712752A CN 201010571275 A CN201010571275 A CN 201010571275A CN 102485914 A CN102485914 A CN 102485914A
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- coal
- peep hole
- instlated tubular
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- blast furnace
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Abstract
According to a peep hole coal injection device for a blast furnace provided by the invention, an insulating pipe with support blades traverses space of a bend hot air channel, inserts into refractory materials around a heating end wall of a peep hole channel and communicates with the peep hole channel into a smooth whole; a coal injection gun inserts into the insulating pipe from the peep hole channel and extends to an outlet of the bend, so that the coal injection gun can carry out coal injection along a central line of a belly pipe. A whole belly pipe channel space becomes space for preheating, destructive distillation and combustion if the coal dust, so as to substantially increase combustion rate of injected coal dust and promote great increase of coal injection of the blast furnace. The invention employs the insulating pipe to protect the coal injection gun and prolong service life of the coal injection gun substantially, so as to remarkably reduce cost of replacing, maintenance and spare part of the coal injection gun. The invention can greatly increase mixing efficiency of the coal dust and hot air, reduce wearing of an inner wall refractory material of the belly pipe and an air port caused by coal dust and realize low oxygen and large coal injection, and is a critical technology for breaking service life of an oxygen coal gun.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, relate to furnace coal spraying technology, especially relate to the device of a kind of blast furnace peep hole coal powder injection.
Background technology
Insert spray gun from peep hole, reach the ingress of belly pipe, whole belly pipe passage just becomes pulverized coal preheating, destructive distillation, incendiary space, and this improves the rate of combustion of pulverized coal injection in blast furnace greatly.Chinese patent ZL90212210.X just with this end in view.It is directly to pass through the hot-air channel space of elbow to spray gun along the upper limb of peep hole passage, reaches the belly pipe inlet and carries out coal powder injection.But this patent exists obviously not enough; Here it is: the hot blast through the elbow break-in comes, to approach the direction of vertical spray gun axis, impact spray gun by the waist; This must make spray gun be heated lose intensity after, very fast occuring bending and deformation under the effect of hot blast surging force.Such result is to guarantee that spray gun is according to inventing the direction coal powder injection that is intended to be parallel to hot-air flow, with the wearing and tearing that seriously cause the belly pipe inwall.
Summary of the invention
The object of the invention is the above-mentioned defective that overcomes this patent, proposes a kind of device of new blast furnace peep hole coal powder injection.
The objective of the invention is to realize like this: the device of a kind of blast furnace peep hole coal powder injection, at least by elbow, instlated tubular, support blade, coal spouting gun, spy on port lid and assembly is formed; In the outlet section of elbow hot-air channel; An instlated tubular passes the space of elbow hot-air channel; Insertion peep hole passage is heated in the end wall refractory materials on every side; Make instlated tubular internal passages and elbow hot-air channel spatially realize isolating fully, and become a level and smooth integral passage with the peep hole channel connection; Outside instlated tubular, there are several pieces support blades to be distributed in the circular channel that outer wall constituted of elbow hot-air channel wall and instlated tubular, support blade keeps in touch with them respectively, and instlated tubular is supported in the hot-air channel; Through the hot blast that the elbow break-in comes, can only walk around the instlated tubular outer wall, all flow out elbow via circular channel, support blade place; Coal spouting gun inserts in the instlated tubular from the peep hole passage, and its rifle head is roughly concordant with the exit end face of instlated tubular or elbow hot-air channel; Coal spouting gun is to be fixed on to spy on port lid and the assembly thereof.
Above-mentioned instlated tubular and support blade are high temperature resistant, oxidation resistant nonmetallic ceramics materials, such as the SiC pottery.
Above-mentioned support blade is a rectilinear form, or helix shape.When support blade when being spiral-shaped, the hot blast that comes from the elbow break-in is flowed through after support blade goes out elbow, will on the belly pipe xsect, form full face eddy flow hot blast.
Above-mentioned support blade is independent the setting, and is provided with at least more than 2, and preferable range is 3～6.Make, install and the raising overall performance for convenient, support blade also can strike up partnership with instlated tubular and carry out integral body manufacturing.
Above-mentioned coal spouting gun is to insert from the optional position of peep hole, to be inserted as preferably along medullary ray.
Above-mentioned coal spouting gun is conventional single tube coal spouting gun, or is with and spies on the sleeve pipe coal spouting gun of function, or band is spied on the sleeve pipe oxygen coal gun of function.
Above-mentioned band is spied on the sleeve pipe coal spouting gun of function, is in the circumferential weld between sleeve pipe, to carry out coal powder injection, and its pipe core is the passage of spying on of peep hole.It is exposed to the pipe core end of atmospheric environment, and sight glass has been installed.
Above-mentioned band is spied on the sleeve pipe oxygen coal gun of function, also is in the circumferential weld between sleeve pipe, to carry out coal powder injection, and its pipe core also is the passage of spying on of peep hole, but it also is an oxygen channel simultaneously.It is exposed to the pipe core end of atmospheric environment, and sight glass also has been installed.
Above-mentioned band is spied on the sleeve pipe coal spouting gun of function and is spied on the sleeve pipe oxygen coal gun of function with band, is another invention of separate case application of the present invention.
The present invention is when adopting conventional single tube coal spouting gun, and what on the peep hole cover plate, install is a periscopic binocular sight glass.
The invention has the beneficial effects as follows:
(1) the present invention installs an instlated tubular at existing elbow outlet section to be communicated with the peep hole passage, and hot blast is from the outer process of instlated tubular, the inner no hot-air flow of instlated tubular.Therefore, from the coal spouting gun that the peep hole passage is inserted, the impact that can not bear hot-air flow just the existing technical problem of aforementioned patent ZL90212210.X can not occur yet.This has guaranteed that under production status coal spouting gun can make the whole channel space of belly pipe become pulverized coal preheating, destructive distillation, incendiary space along the centerline direction coal powder injection of belly pipe.This will help to improve greatly the rate of combustion of coal injection, promote increasing substantially of pulverized coal injection ratio.
(2) because the present invention has adopted instlated tubular to protect coal spouting gun, greatly prolonged the work-ing life that makes coal spouting gun, and fundamentally solved coal spouting gun short problem in work-ing life in the prior art.Simultaneously, because instlated tubular is the nonmetallic ceramics material, have very long work-ing life, therefore, the present invention will significantly reduce the coal powder injection time of being delayed owing to the frequent change coal spouting gun, and this can improve injecting coal quantity.Simultaneously, this has also reduced replacing, maintenance and the spare part cost of coal spouting gun significantly.
(3) the present invention is when existing elbow outlet section adopts the support blade of helix shape; With the hot blast that comes from the elbow break-in being flowed through after support blade goes out elbow; On the belly pipe xsect, form full face eddy flow hot blast; The coal dust of coal spouting gun winding-up will be carried by this eddy flow hot blast, this than existing patent ZL90212210.X raising by a larger margin the mixing efficiency of coal dust and hot-air chamber, will further help coal dust in belly pipe passage stroke, to realize burning.
(4) the present invention is provided with instlated tubular at the outlet section of existing elbow, makes elbow exit cross-section center will form negative pressure region, and coal dust sprays into the center that this zone will be squeezed to belly pipe rapidly by hot blast.Especially when adopting the eddy flow support blade, coal dust will rotate along the medullary ray of belly pipe, makes it have better directivity, and this will reduce the wearing and tearing of coal dust to the anti-material of belly pipe inwall.
(5) the present invention is the blowing oxygen pipe as the pipe core of spying on passage when adopting band to spy on the sleeve pipe oxygen coal gun of function, and it is positioned at the central position of elbow outlet, and this makes and is sandwiched in the coal dust of being jetted between hot blast and the oxygen.This has improved the effect that oxygen is participated in coal dust firing greatly, is that other technologies measure is so far pursued but the purpose that never can reach all the time, and this will be one of best-of-breed technology of realizing low oxygen enrichment big coal injection technology.In addition; The coal dust that this pipe core is sprayed in the sleeve pipe around; Be the temperature lowermost extent, oxygen mixes the not enough temperature of combustion of fashion with coal dust, therefore; This prolongs the life-span of this pipe core greatly, and this will solve the guardian technique problem in the oxygen coal gun work-ing life that can't break through all the time in the ironmaking technology field for a long time.
Description of drawings
Fig. 1 is the topology view of the embodiment of the invention 1.
Fig. 2 is the A-A cross sectional view of Fig. 1.
Fig. 3 is the topology view of the embodiment of the invention 2.
In figure, 1 is belly pipe, and 2 is flange, and 3 is flange, and 4 is support blade, and 5 is instlated tubular, and 6 is elbow; 7 is coal spouting gun, and 8 for spying on port lid, and 9,11 is assembly, and 10 is the binocular sight glass, and 12 is coal spouting gun, and 13 are the coal powder injection inlet duct, and 14 is the oxygen intake pipeline, and 15 is sight glass, and 16 is pipe core.
Embodiment
In Fig. 1, the device of a kind of blast furnace peep hole coal powder injection, at least by elbow 6, instlated tubular 5, support blade 4, coal spouting gun 7, spy on port lid 8 and assembly 9,11 is formed.Elbow 6 is to link to each other with existing belly pipe 1 through flange 2,3.In the outlet section of elbow 6 hot-air channels; An instlated tubular 5 passes the space of elbow 6 hot-air channels; Insertion peep hole passage is heated in the end wall refractory materials on every side; Make the internal passages and elbow 6 hot-air channels of instlated tubular 5 spatially realize isolating fully, and become a level and smooth integral passage with the peep hole channel connection.Outside instlated tubular 5, there are several pieces support blades 4 to be distributed in the circular channel that outer wall constituted of elbow 6 hot-air channel walls and instlated tubular 5, support blade 4 keeps in touch with them respectively, and instlated tubular 5 is supported in the hot-air channel.Through the hot blast that elbow 6 break-ins come, can only walk around instlated tubular 5 outer walls, all flow out elbow 6 via circular channel, support blade 4 place.Coal spouting gun 7 inserts in the instlated tubular 5 from the peep hole passage, and its rifle head is roughly concordant with the exit end face of instlated tubular 5 or elbow 6 hot-air channels.Coal spouting gun 7 is to be fixed on to spy on port lid 8 and the assembly 9,11 thereof.
In Fig. 1,2,3, above-mentioned instlated tubular 5 and support blade 4 are high temperature resistant, oxidation resistant nonmetallic ceramics materials, such as the SiC material.Adopt instlated tubular 5 to protect coal spouting gun, greatly prolonged the work-ing life that makes coal spouting gun 7,12, and fundamentally solved coal spouting gun short problem in 7 work-ing lifes in the prior art.Simultaneously, because instlated tubular 5 is the nonmetallic ceramics material, have very long work-ing life, therefore, the present invention will significantly reduce because the coal powder injection time that the frequent change coal spouting gun is delayed.
In Fig. 1,2,3, above-mentioned support blade 4 is rectilinear forms, or helix shape.When support blade 4 when being spiral-shaped, the hot blast that comes from elbow 6 break-ins is flowed through after support blade 4 goes out elbow 6, will on belly pipe 1 xsect, form full face eddy flow hot blast.At this moment, the coal dust of jetting from coal spouting gun 12 will be carried by this eddy flow hot blast, significantly improve the mixing efficiency of coal dust and hot-air chamber.
In Fig. 1,2,3, above-mentioned support blade 4 is independent settings, and is provided with at least more than 2, and preferable range is 3～6.Make, install and the raising overall performance for convenient, support blade 4 also can strike up partnership with instlated tubular 5 and carry out integral body manufacturing.
In Fig. 1,3, above-mentioned coal spouting gun 7,12 is to insert from the optional position of peep hole, to be inserted as preferably along medullary ray.At this moment, will make elbow 1 exit cross-section center will form negative pressure region, coal dust sprays into the center that this zone will be squeezed to belly pipe rapidly by hot blast.Especially when adopting eddy flow support blade 4, coal dust will rotate along the medullary ray of belly pipe 1, makes it have better directivity, with reducing the wearing and tearing of coal dust to the anti-material of belly pipe 1 inwall.
In Fig. 1, the coal spouting gun 7 that the present invention adopts is existing conventional single tube coal spouting guns.
In Fig. 3, the coal spouting gun 12 that the present invention adopts is that band is spied on the sleeve pipe oxygen coal gun of function.This coal spouting gun 12 is in the circumferential weld between sleeve pipe, to carry out coal powder injection, and its pipe core 16 is the passages of spying on of peep hole, also is oxygen channel simultaneously.Pipe core 16 ends that are exposed to atmospheric environment have been installed sight glass 15.On this pipe core 16, be connected with oxygen intake pipeline 14.On the sleeve pipe of this coal spouting gun 12, be connected with coal powder injection inlet duct 13.Because the pipe core 16 as spying on passage is blowing oxygen pipes, it is positioned at the central position of elbow 6 outlets, and this makes and is sandwiched in the coal dust of being jetted between hot blast and the oxygen.This has improved the effect that oxygen is participated in coal dust firing greatly, is that other technologies measure is so far pursued but the purpose that never can reach all the time.In addition; The coal dust that this pipe core 16 is sprayed in the sleeve pipe around; Be the temperature lowermost extent, oxygen mixes the not enough temperature of combustion of fashion with coal dust, therefore; This prolongs the life-span of this pipe core greatly, and this will solve the oxygen coal gun short guardian technique problem in work-ing life that can't break through all the time in the ironmaking technology field for a long time.
In Fig. 3, remove the oxygen intake pipeline 14 that on pipe core 16, connects, be band and spy on the sleeve pipe coal spouting gun of function.
In Fig. 1, the present invention is a periscopic binocular sight glass 10 spying on what install on port lid 8 plates when adopting conventional single tube coal spouting gun.
Figure of description 1 is a Figure of abstract.Part 1,2 is the prior art content in the accompanying drawing, non-technology contents of the present invention.
Claims (6)
1. the device of blast furnace peep hole coal powder injection is characterized in that: it at least by elbow, instlated tubular, support blade, coal spouting gun, spy on port lid and assembly is formed; In the outlet section of elbow hot-air channel; An instlated tubular passes the space of elbow hot-air channel; Insertion peep hole passage is heated in the end wall refractory materials on every side; Make instlated tubular internal passages and elbow hot-air channel spatially realize isolating, and become a level and smooth integral passage with the peep hole channel connection; Outside instlated tubular, there are several pieces support blades to be distributed in the circular channel that outer wall constituted of elbow hot-air channel wall and instlated tubular, support blade keeps in touch with them respectively, and instlated tubular is supported in the hot-air channel; Coal spouting gun inserts in the instlated tubular from the peep hole passage, and its rifle head is roughly concordant with the exit end face of instlated tubular or elbow hot-air channel; Coal spouting gun is to be fixed on to spy on port lid and the assembly thereof.
2. aforesaid right requires the device of 1 described blast furnace peep hole coal powder injection, it is characterized in that: described instlated tubular and support blade are high temperature resistant, oxidation resistant nonmetallic ceramics materials, such as the SiC pottery.
3. aforesaid right requires the device of 1 described blast furnace peep hole coal powder injection, it is characterized in that: described support blade is a rectilinear form, or helix shape.
4. aforesaid right requires the device of 1 described blast furnace peep hole coal powder injection, it is characterized in that: described support blade is independent the setting, and is provided with at least more than 2, and preferable range is 3～6.
5. aforesaid right requires the device of 1 described blast furnace peep hole coal powder injection, it is characterized in that: described instlated tubular and support blade are to strike up partnership to carry out integral body manufacturing.
6. aforesaid right requires the device of 1 described blast furnace peep hole coal powder injection, it is characterized in that: described coal spouting gun is conventional single tube coal spouting gun, or is with and spies on the sleeve pipe coal spouting gun of function, or band is spied on the sleeve pipe oxygen coal gun of function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105712752A CN102485914A (en) | 2010-12-01 | 2010-12-01 | Peep hole coal injection device for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105712752A CN102485914A (en) | 2010-12-01 | 2010-12-01 | Peep hole coal injection device for blast furnace |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010603624 Division CN102042763A (en) | 2010-12-01 | 2010-12-01 | Sleeve coal spraying gun with viewing function |
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| Publication Number | Publication Date |
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| CN102485914A true CN102485914A (en) | 2012-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105712752A Pending CN102485914A (en) | 2010-12-01 | 2010-12-01 | Peep hole coal injection device for blast furnace |
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| CN (1) | CN102485914A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62263906A (en) * | 1986-05-12 | 1987-11-16 | Sumitomo Metal Ind Ltd | Method for blowing pulverized coal from blast furnace tuyere |
| CN2068510U (en) * | 1990-05-07 | 1991-01-02 | 东南大学 | Fine coal blowing unit of blast furnace |
| CN200996617Y (en) * | 2007-01-23 | 2007-12-26 | 宝山钢铁股份有限公司 | Device against flutter for coal-powder injecter of blast furnace |
| CN201999953U (en) * | 2010-12-01 | 2011-10-05 | 张昭贵 | Blast furnace peephole coal injection device |
-
2010
- 2010-12-01 CN CN2010105712752A patent/CN102485914A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62263906A (en) * | 1986-05-12 | 1987-11-16 | Sumitomo Metal Ind Ltd | Method for blowing pulverized coal from blast furnace tuyere |
| CN2068510U (en) * | 1990-05-07 | 1991-01-02 | 东南大学 | Fine coal blowing unit of blast furnace |
| CN200996617Y (en) * | 2007-01-23 | 2007-12-26 | 宝山钢铁股份有限公司 | Device against flutter for coal-powder injecter of blast furnace |
| CN201999953U (en) * | 2010-12-01 | 2011-10-05 | 张昭贵 | Blast furnace peephole coal injection device |
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| DD01 | Delivery of document by public notice |
Addressee: Qin Lu Document name: Notification of Passing Preliminary Examination of the Application for Invention |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20120606 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |