CN102042763A - Sleeve coal spraying gun with viewing function - Google Patents
Sleeve coal spraying gun with viewing function Download PDFInfo
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- CN102042763A CN102042763A CN 201010603624 CN201010603624A CN102042763A CN 102042763 A CN102042763 A CN 102042763A CN 201010603624 CN201010603624 CN 201010603624 CN 201010603624 A CN201010603624 A CN 201010603624A CN 102042763 A CN102042763 A CN 102042763A
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- sleeve pipe
- coal
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- central tube
- oxygen
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Abstract
The invention provides a sleeve coal spraying gun with a viewing function. A center pipe with an oxygen inlet is inserted into a sleeve with a pulverized coal inlet, and the tail end of the center pipe is provided with a viewing device. Coal is sprayed from the sleeve, and oxygen enrichment is carried out in the center pipe. Because the center pipe is installed on the center line of a tuyere and a belly pipe, the situation in a furnace in front of the tuyere is viewed from the pipe, and a view field same with the prior art can be obtained. Because the coal is sprayed from the sleeve, the outer surface area of the sprayed annular pulverized coal flow is large, thus being favorable for mixing the pulverized coal with oxygen or hot air and accelerating the combustion of the pulverized coal. In the invention, the pulverized coal burns between the hot air and the oxygen, and the effect of the oxygen participating in the combustion of the pulverized coal is improved, so that the sleeve coal spraying gun is a practical technology for realizing low oxygen-enriched large pulverized coal injection. The invention also solves the problem of short service life of an oxygen-coal gun. The sleeve coal spraying gun can be used for a COREX furnace.
Description
Technical field
The invention belongs to iron-making coal-injecting equipment, relate to the coal powder lance of coal injection in blast furnace or COREX stove, especially relate to the sleeve pipe coal powder lance that a kind of band is spied on function.
Background technology
In blast furnace ironmaking is produced, insert spray gun from peep-hole, reach the porch of belly pipe, whole belly pipe passage just becomes the space of pulverized coal preheating, destructive distillation, burning, and this has improved the burning quantity and the efficiency of combustion of coal injection greatly.But after plugging in rifle from peep-hole, if continue to adopt the existing mode of spying on to spy on the air port district's internal combustion situation of circling round, its visual field will be affected, and especially adopt when plugging in rifle from the peep-hole center all the more so.Therefore, adopt peep-hole to plug in rifle mode coal injection, then need to improve having coal powder lance now and spying on mode, its objective is and when increasing coal powder injection quantity and improving efficiency of combustion, guarantee in peep-hole, to observe the situation of circling round in the State of Blast Furnace and distinguishing.
In the prior art, 200920210892.2 patents have been announced a kind of visual oxygen coal spray gun, are applicable to the coal powder injection of CONREX stove.The central tube of this oxygen coal spray gun is a coal injection, the interior delivering oxygen of sleeve pipe that central tube is outer; Peep-hole is what to separate with central tube, is installed in side by side on the flange of sleeve pipe tail end, and peep-hole is observed the air port by the circumferential weld in the sleeve pipe.The problem of this oxygen coal spray gun is: the visual range of peep-hole is the part in the sleeve pipe, and all the other are blocked by central tube, can't observe situation complete in the forehearth of air port by peep-hole; In addition, because the central tube diameter is little, the external surface area of the pulverized coal flow thigh that is sprayed is little, therefore with oxygen between contact and the area that mixes also just little, this is unfavorable for the mixing and burning of oxygen and coal dust.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, propose the sleeve pipe coal powder lance that a kind of new band is spied on function, both be used in pulverized coal injection, also be applicable to the coal powder injection of COREX stove.
The object of the present invention is achieved like this: the sleeve pipe coal powder lance that a kind of band is spied on function is by the central tube of the sleeve pipe of a band coal powder entrance, a band oxygen intake, spies on device and load module constitutes; The front end of this sleeve pipe and central tube is the outlet of coal powder lance, is the part of inserting the peep-hole passage; Spy on the central tube rear end that device is installed in the band oxygen intake, this central tube is inserted in the sleeve pipe of band coal powder entrance, and they constitute one by load module;
Above-mentioned load module comprises: central tube and sleeve pipe are connected into whole companion flange, they are welded on respectively on central tube and the sleeve pipe, wherein: the companion flange on the central tube is welded on the oxygen intake central tube before, and the companion flange on the sleeve pipe is welded on the sleeve pipe rear end after the coal powder entrance;
Above-mentioned load module comprises: the ball valve of device eyeglass is spied in convenient online replacing.It is installed in oxygen intake and spies on the central tube between the device.When the eyeglass of device is spied in the needs replacing, close ball valve, can prevent that oxygen or furnace gas from leaking.When needs are disclosed the air port, close ball valve, lay down and spy on device, opening ball valve, go into to disclose bar from the central tube trace interpolation and disclose the air port.
Above-mentioned load module comprises: with the installed part that the sleeve pipe coal powder lance puts into production use, it is welded on the sleeve pipe, is in the position before the coal powder entrance, it with spy on port lid and assembly connects.This installed part is a flange or other forms of connector.
Above-mentioned central tube, its front end have been installed the nozzle of a pottery.The center of this nozzle is the outlet section passage of oxygen, uniform several blades on this nozzle outer circle wall.This blade is packed into by integral body in the sleeve pipe.Enter coal dust in the sleeve pipe from coal powder entrance, this blade ejection of all flowing through.This blade or rectilinear form or helix shape.When blade adopted helix shape, the coal dust that is sprayed was converted into the pulverized coal flow thigh of rotation.
On above-mentioned central tube, the coal dust wearing and tearing central tube in order to prevent to enter from the sleeve pipe coal powder entrance over against the coal powder entrance place, is provided with one section ceramic protecting pipe, is enclosed in outside the central tube.In case of necessity, the nozzle of this ceramic protecting pipe and above-mentioned pottery be manufactured into as a whole.
On above-mentioned sleeve pipe, the coal dust wear sleeve inwall in order to prevent to enter from the sleeve pipe coal powder entrance at the coal powder entrance environs, is provided with one section perforate ceramic protecting pipe, is embedded in the sleeve pipe, and its perforate is over against coal powder entrance.
On above-mentioned sleeve pipe, be subjected to unexpected thermal shock in order to prevent sleeve pipe, such as: after the instlated tubular of installing in elbow breaks; can cause hot-air flow to impact the coal powder lance situation; therefore, be provided with ceramic protecting pipe, to improve the ability that sleeve pipe bears unexpected thermal shock at sleeve outer wall.
Cancel the oxygen intake that is provided with on the above-mentioned central tube, band of the present invention is spied on the sleeve pipe coal powder lance of function, only carries out coal powder injection the circumferential weld between sleeve pipe and central tube, and its central tube is just spied on passage.
The invention has the beneficial effects as follows:
(1) the present invention is applicable to from peep-hole and plugs in the rifle coal powder injection.Because the central tube that adopts the center line that is installed in air port or belly pipe is as spying on passage, it is in the optimum position of observing situation in the forehearth of air port, can obtain visual field same as the prior art.
(2) the present invention makes sleeve pipe into the coal powder injection pipe, because casing diameter is much larger than central tube, under identical discharge speed conditions, pulverized coal flow sprays coal powder lance in the form of a ring, thin thickness, the external surface area of pulverized coal flow increase greatly, this extremely helps spraying mixing of coal dust and oxygen or hot-air chamber, can promote coal dust firing.
(3) the present invention with central tube as oxygen channel, when on blast furnace, using, because it is positioned at the center of elbow outlet, this makes the coal dust of being jetted be sandwiched between hot blast and the oxygen, this has greatly improved the effect of oxygen participation coal dust firing, be that other technologies measure is so far pursued but the purpose never reached all the time, 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 central tube is sprayed in the sleeve pipe around, it is the temperature lowermost extent, oxygen mixes the not enough ignition temperature of fashion with coal dust, therefore, this prolongs the life-span of this central tube greatly, and this will solve the oxygen coal gun short guardian technique problem in service life that can't break through all the time in the ironmaking technology field for a long time.When on the COREX stove, using equally, the quantity and the ratio of the oxygen in control centre's pipe, all the other oxygen send oxygen according to existing mode, and the coal dust of being jetted be clipped between oxygen and the oxygen, help oxygen coal mixing and burning.
(4) the present invention has installed a nozzle in the exit of central tube, when using on blast furnace, can play the effect of the mixing of strengthening coal dust and hot blast.Because when peep-hole was plugged in the rifle coal powder injection, the exit of coal nozzle was a negative pressure region, hot blast is to compile to the center, this moment, nozzle was rushed in the hot blast coal dust generation eddy flow, and coal dust has velocity attitude different with hot blast and kinetic energy, provides to strengthen the dynamic conditions that mixes.
(5) the present invention is provided with ceramic protecting pipe and improves the ability that sleeve pipe bears unexpected thermal shock at sleeve outer wall, has satisfied the security reliability when using on blast furnace.[0019] (6) the present invention can disclose the air port operation in central tube, because the central tube front end is in negative pressure region, therefore, has existing operation situation to compare, and discloses air port hourglass fetch degree and reduces significantly, the noise that has produced when also having reduced operation significantly simultaneously.
Description of drawings
Fig. 1 is a structure cutaway view of the present invention.
In figure, 1 is blade, and 2 is nozzle, and 3 is central tube, and 4 is sleeve pipe, and 5 is installed part, and 6 is coal powder entrance; 7 is oxygen intake, and 8 is ball valve, and 9 for spying on device, and 10,11 is companion flange, and 12 are the perforate ceramic protecting pipe, and 13 is ceramic protecting pipe, and 14 is ceramic protecting pipe.
The specific embodiment
In Fig. 1, the sleeve pipe coal powder lance that a kind of band is spied on function by the central tube 3 of the sleeve pipe 4 of a band coal powder entrance 6, a band oxygen intake 7, spy on device 9 and load module constitutes.The front end of this sleeve pipe 4 and central tube 3 is outlets of coal powder lance, is the part of inserting the peep-hole passage; Spy on central tube 3 rear ends that device 9 is installed in band oxygen intake 7, this central tube 3 is inserted in the sleeve pipe 4 of band coal powder entrance 6, and they constitute one by load module.
In Fig. 1, load module comprises central tube 3 and sleeve pipe 4 is connected into whole companion flange 10,11, they are welded on respectively on central tube 3 and the sleeve pipe 4, wherein: the companion flange 10 on the central tube 3 is welded on oxygen intake 7 central tube 3 before, and the companion flange 11 on the sleeve pipe 4 is welded on sleeve pipe 4 rear ends after the coal powder entrance 6.This companion flange 10,11 has made things convenient for the maintenance of central tube 3 and ceramic protecting pipe 12 and end nozzle 2 to change.
In Fig. 1, above-mentioned load module also comprises the ball valve 8 that makes things convenient for online replacing to spy on device 9 eyeglasses.It is installed in oxygen intake 7 and spies on the central tube 3 between the device 9.When the eyeglass of device 9 is spied in the needs replacing, close ball valve 8, can prevent that oxygen or furnace gas from leaking.When needs are disclosed the air port, close ball valve 8, lay down and spy on device 9, opening ball valve 8 again, go into to disclose bar from the central tube trace interpolation and disclose the air port.
In Fig. 1, above-mentioned load module also comprises the installed part 5 that coal powder lance is put into production use, and it is welded on the sleeve pipe 4, is in the position before the coal powder entrance 6, its effect be with coal powder lance of the present invention with spy on port lid and assembly connects.This installed part 5 is a flange or other forms of connector.
In Fig. 1, on above-mentioned central tube 3, its front end has connected the nozzle 2 of a pottery.The central passage of nozzle 2 is outlet sections of delivering oxygen.Uniform several blades 1 on these nozzle 2 outer circle walls.This blade 1 is packed into by integral body in the sleeve pipe 4.Enter coal dust in the sleeve pipe 4, this blade 1 ejection of all flowing through from coal powder entrance.This blade 1 or rectilinear form or helix shape.When blade 1 adopted helix shape, the coal dust that is sprayed was converted into the pulverized coal flow thigh of rotation.
In Fig. 1, on above-mentioned central tube 3,, be enclosed in outside the central tube 3 in order to prevent over against coal powder entrance 7 places, to be provided with one section ceramic protecting pipe 13 from the coal dust wearing and tearing central tube 3 of sleeve pipe 4 coal powder entrances 6 ejections.In case of necessity, this ceramic protecting pipe 13 is manufactured into as a whole with the nozzle 2 of above-mentioned pottery.
In Fig. 1, on above-mentioned sleeve pipe 4,, be embedded in the sleeve pipe 4 in order to prevent at the coal powder entrance environs, to be provided with one section perforate ceramic protecting pipe 12 from coal dust wear sleeve 4 inwalls of sleeve pipe 4 coal powder entrances ejection, its perforate is over against coal powder entrance.
In Fig. 1, be subjected to unexpected thermal shock in order to prevent sleeve pipe 4, such as: after the instlated tubular of installing in elbow breaks; can cause hot-air flow to impact the coal powder lance situation, therefore, on the outer wall of above-mentioned sleeve pipe 4; be provided with ceramic protecting pipe 14, to improve the ability that sleeve pipe bears unexpected thermal shock.
In Fig. 1, cancellation oxygen intake 7 on above-mentioned central tube 3, band of the present invention is spied on the sleeve pipe coal powder lance of function, can only carry out coal powder injection from the circumferential weld between central tube 3 and the sleeve pipe 4, and its central tube 3 is just spied on passage.
In the foregoing description, spy on the content that port lid and assembly thereof, elbow and instlated tubular thereof are 201010571275.2 patent applications.Figure of description 1 is a Figure of abstract.
Claims (6)
1. the band sleeve pipe coal powder lance of spying on function is by the central tube of the sleeve pipe of a band coal powder entrance, a band oxygen intake, spies on device and load module constitutes, it is characterized in that: spy on the central tube rear end that device is installed in the band oxygen intake, this central tube is inserted in the sleeve pipe of band coal powder entrance, and they constitute one by load module;
Described load module comprises a pair of companion flange, and the companion flange on the central tube is welded on the oxygen intake central tube before, and the companion flange on the sleeve pipe is welded on the sleeve pipe rear end after the coal powder entrance;
Described load module also comprises a ball valve, is installed in oxygen intake and spies on the central tube between the device;
Described load module also is included in before the coal powder entrance, is welded in the installed part on the sleeve pipe.
2. aforesaid right requires 1 described band to spy on the sleeve pipe coal powder lance of function, it is characterized in that: the front end of described central tube has been installed a nozzle, and the blade of nozzle is arranged on self outer wall, is packed in the sleeve pipe by integral body.
3. aforesaid right requires 1 described band to spy on the sleeve pipe coal powder lance of function, it is characterized in that: on the described central tube, over against the coal powder entrance place, be provided with one section ceramic protecting pipe.
4. aforesaid right requires 1 described band to spy on the sleeve pipe coal powder lance of function, it is characterized in that: on the described sleeve pipe, at the coal powder entrance environs, be provided with one section perforate ceramic protecting pipe, be embedded in the sleeve pipe, its perforate is over against coal powder entrance.
5. aforesaid right requires 1 described band to spy on the sleeve pipe coal powder lance of function, it is characterized in that: on the described sleeve pipe, its outer wall is provided with ceramic protecting pipe.
6. aforesaid right requires 1 described band to spy on the sleeve pipe coal powder lance of function, and it is characterized in that: described central tube is to have cancelled oxygen intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010603624 CN102042763A (en) | 2010-12-01 | 2010-12-01 | Sleeve coal spraying gun with viewing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010603624 CN102042763A (en) | 2010-12-01 | 2010-12-01 | Sleeve coal spraying gun with viewing function |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105712752A Division CN102485914A (en) | 2010-12-01 | 2010-12-01 | Peep hole coal injection device for blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102042763A true CN102042763A (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010603624 Pending CN102042763A (en) | 2010-12-01 | 2010-12-01 | Sleeve coal spraying gun with viewing function |
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| Country | Link |
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| CN (1) | CN102042763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168543A (en) * | 2016-08-17 | 2016-11-30 | 华电电力科学研究院 | A kind of sampling gun sleeve preventing coal dust splash |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068510U (en) * | 1990-05-07 | 1991-01-02 | 东南大学 | Fine coal blowing unit of blast furnace |
| US5611838A (en) * | 1993-12-10 | 1997-03-18 | Voest-Alpine Industrieanlagenbau Gmbh | Process for producing an iron melt |
| CN201497374U (en) * | 2009-10-16 | 2010-06-02 | 上海宝钢工程技术有限公司 | Visible oxygen coal spray lance |
-
2010
- 2010-12-01 CN CN 201010603624 patent/CN102042763A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068510U (en) * | 1990-05-07 | 1991-01-02 | 东南大学 | Fine coal blowing unit of blast furnace |
| US5611838A (en) * | 1993-12-10 | 1997-03-18 | Voest-Alpine Industrieanlagenbau Gmbh | Process for producing an iron melt |
| CN201497374U (en) * | 2009-10-16 | 2010-06-02 | 上海宝钢工程技术有限公司 | Visible oxygen coal spray lance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168543A (en) * | 2016-08-17 | 2016-11-30 | 华电电力科学研究院 | A kind of sampling gun sleeve preventing coal dust splash |
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Addressee: Zhang Zhaogui Document name: Notification of Publication and of Entering the Substantive Examination Stage of the Application for Invention |
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Application publication date: 20110504 |