CN114908201B - Blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel combined type injection device - Google Patents
Blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel combined type injection device Download PDFInfo
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- CN114908201B CN114908201B CN202210412295.8A CN202210412295A CN114908201B CN 114908201 B CN114908201 B CN 114908201B CN 202210412295 A CN202210412295 A CN 202210412295A CN 114908201 B CN114908201 B CN 114908201B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B2005/005—Selection or treatment of the reducing gases
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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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The invention provides a blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel combined injection device, which comprises: a spray gun, a belly pipe and a tuyere sleeve; the spray gun consists of a hydrogen-rich solid fuel spray pipe and a hydrogen-rich gas fuel spray pipe, and the hydrogen-rich gas fuel spray pipe is arranged around the hydrogen-rich solid fuel spray pipe; the tail end of the spray gun is provided with a hydrogen-rich gas fuel nozzle and a hydrogen-rich solid fuel nozzle, the hydrogen-rich gas fuel nozzle is positioned on the side wall of the tail end of the hydrogen-rich gas fuel spray pipe, and the hydrogen-rich solid fuel nozzle is positioned at the outlet end of the hydrogen-rich solid fuel spray pipe and protrudes out of the hydrogen-rich gas fuel spray pipe. The invention solves the problem of low combustion efficiency of simultaneously injecting hydrogen-rich gas and coal powder, and has the advantages of various injected fuels, high combustion efficiency, compact device structure, good cooling effect and long service life.
Description
Technical Field
The invention relates to the field of blast furnace ironmaking, in particular to a hydrogen-rich fuel injection device for a blast furnace.
Background
The iron and steel industry is a major household of energy consumption and carbon emission, wherein the reduction of the carbon emission in iron making production by using the maximum energy consumption and carbon emission of a blast furnace iron making process is the key for realizing the double-carbon goal in the iron and steel industry. In order to reduce the carbon emission in iron-making production, the research on low-carbon metallurgical technology is carried out in a plurality of domestic steel industries, wherein hydrogen metallurgy is regarded as a main way for achieving the aim of producing double carbon in steel. Although the short flow of the hydrogen shaft furnace direct reduction process and the electric furnace steelmaking has lower carbon emission and is a key field of the hydrogen metallurgy technology in the future, considering that the current China is mainly a long flow of a blast furnace converter, the elimination of mass production of blast furnaces can be completed within a long period of time, and the development of the blast furnace hydrogen-rich smelting technology still has wide market demand in the period. The blast furnace hydrogen-rich gas injection technology can effectively reduce the consumption of coal powder in the iron-making production process at present, and common hydrogen-rich gas types comprise natural gas, coke oven gas, coal gas, hydrogen and the like. The hydrogen-rich gas is injected and burned in front of the tuyere to provide heat and reducing agent for blast furnace smelting, and meanwhile, the reduction process of blast furnace burden can be improved, the development of indirect reduction is promoted, the direct reduction degree is reduced, and further the fuel consumption of the blast furnace smelting can be reduced.
The blast furnace injection of hydrogen-rich gas needs a special spray gun, and the current injection devices capable of implementing the blast furnace injection of hydrogen-rich gas comprise a straight pipe insertion type, a sleeve straight pipe insertion type and a tuyere integral type. The straight pipe inserted spray gun has the characteristics of simple structure, long service life and convenient replacement, but for a blast furnace which is blown by hydrogen-rich solid fuels such as coal dust and hydrogen-rich gas together, the problem that the coal dust flow easily washes the inner wall of the tuyere sleeve due to the mutual influence of two spray guns arranged in the limited space of the tuyere sleeve is solved. The sleeve straight pipe insertion type spray gun is characterized in that a sleeve is additionally arranged on a gun body of the pulverized coal spray gun, pulverized coal is sprayed in an inner pipe, hydrogen-rich gas is sprayed in a loop between the outer pipe and the inner pipe, the operation that one spray gun simultaneously sprays pulverized coal and hydrogen-rich gas is realized, however, pulverized coal streams are arranged inside the spray opening of the sleeve straight pipe insertion type spray gun, hydrogen-rich gas streams are arranged outside the spray opening, the outlet end of the pulverized coal spray pipe is in contact with hot air and is washed by pulverized coal particles sprayed at a high speed, the abrasion is easy, the service life of the spray gun is limited, the hydrogen-rich gas and the pulverized coal influence each other, the pulverized coal combustion rate is reduced, the unburned pulverized coal content is increased, and the stable and smooth operation of blast furnace production is influenced. The tuyere integral type spray gun integrally casts the hydrogen-rich gas spray gun into the tuyere sleeve, so that the interference of hydrogen-rich gas spraying on coal powder spraying is reduced, the high-efficiency spraying and burning of the hydrogen-rich gas and the coal powder are realized, but the integral type spray gun influences the structure of a cooling water channel inside the tuyere sleeve, the service life of the tuyere sleeve is adversely affected, and meanwhile, the independent replacement of the hydrogen-rich gas spray gun cannot be realized, so that the tuyere integral type spray gun is high in manufacturing cost and short in service life.
Therefore, it is necessary to design a combined injection device of hydrogen-rich solid fuel and hydrogen-rich gas fuel to overcome the above problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hydrogen-rich solid fuel and hydrogen-rich gas fuel combined injection device which can fully combust hydrogen-rich solid fuel, is convenient to replace, has low manufacturing cost and long service life.
In order to achieve the above object, the present invention provides a combined injection device for a hydrogen-rich solid fuel and a hydrogen-rich gas fuel of a blast furnace, the device comprising: the spray gun comprises a spray gun (1), a belly pipe (2) and a tuyere sleeve (3); the spray gun (1) consists of a hydrogen-rich solid fuel spray pipe (10) and a hydrogen-rich gas fuel spray pipe (11), and the hydrogen-rich gas fuel spray pipe (11) is arranged around the hydrogen-rich solid fuel spray pipe (10); the tail end of the spray gun (1) is provided with a hydrogen-rich gas fuel nozzle (13) and a hydrogen-rich solid fuel nozzle (14), wherein the hydrogen-rich gas fuel nozzle (13) is positioned on the side wall of the tail end of the hydrogen-rich gas fuel spray pipe (11), and the hydrogen-rich solid fuel nozzle (14) is positioned at the outlet end of the hydrogen-rich solid fuel spray pipe (10) and protrudes out of the hydrogen-rich gas fuel spray pipe (11).
In a preferred embodiment of the invention, the lance (1) is obliquely inserted into the side wall of the belly pipe (2), the two parts are fixedly connected through a lance mounting flange (6), the belly pipe (2) is in spherical contact connection with the tuyere sleeve (3), and the lance (1) passes through the belly pipe (2) and extends to the tuyere sleeve (3).
As a preferable embodiment of the invention, the hydrogen-rich gas fuel spray pipe (11) and the hydrogen-rich solid fuel spray pipe (10) are coaxially arranged, the outer diameter of the hydrogen-rich solid fuel spray pipe (10) is smaller than the inner diameter of the hydrogen-rich gas fuel spray pipe (11), the head end and the tail end of the hydrogen-rich gas fuel spray pipe (11) are hermetically connected with the outer wall of the hydrogen-rich solid fuel spray pipe (10), and a loop formed between the hydrogen-rich gas fuel spray pipe (11) and the hydrogen-rich solid fuel spray pipe (10) is a hydrogen-rich gas fuel channel (12).
As a preferred embodiment of the present invention, the hydrogen-rich gas outlet angle (15) between the hydrogen-rich gas nozzle center line of the hydrogen-rich gas fuel nozzles (13) and the hydrogen-rich solid fuel nozzle center line (5) in the blowing direction is 75 DEG to 135 deg.
As a preferred embodiment of the present invention, wherein the hydrogen-rich gas outlet angle (15) is 90-120 deg..
As a preferable embodiment of the invention, the inlet end of the hydrogen-rich gas fuel channel (12) is connected with the hydrogen-rich gas fuel injection connecting pipe (8) and the auxiliary gas purging connecting pipe (9), and the inlet end of the hydrogen-rich solid fuel spray pipe (10) is connected with the hydrogen-rich solid fuel injection connecting pipe (7).
As a preferred embodiment of the invention, the tail end of the spray gun (1) and the main body of the spray gun are at an angle, so that the hydrogen-rich solid fuel nozzle central line (5) of the hydrogen-rich solid fuel nozzle (14) is coincident with the tuyere sleeve central line (4) of the tuyere sleeve (3).
In a preferred embodiment of the present invention, the hydrogen-rich gas fuel comprises one or more of hydrogen, coal gas, natural gas, artificial gas and liquefied gas, and the hydrogen-rich solid fuel comprises one or more of bituminous coal, anthracite coal, lean coal, lignite and semicoke.
As a preferred embodiment of the present invention, wherein the hydrogen-rich gas fuel and the hydrogen-rich solid fuel are injected separately or simultaneously; when the hydrogen-rich solid fuel is independently blown, nitrogen is introduced into the hydrogen-rich gas fuel channel, or oxygen is introduced into the hydrogen-rich gas fuel channel.
The invention has the beneficial effects that: the invention can replace the position of the coal injection gun with the coal powder and hydrogen-rich gas combined spray gun on the basis of the existing pulverized coal injection blast furnace, realizes the simultaneous injection of hydrogen-rich gas fuel and hydrogen-rich solid fuel, and has the advantages of strong adaptability of injected fuel types, high fuel combustion efficiency, compact device structure, good spray gun cooling effect, low manufacturing cost and long service life.
Drawings
FIG. 1 is a schematic structural diagram of a combined injection device for hydrogen-rich solid fuel and hydrogen-rich gas fuel according to the present invention;
FIG. 2 is a schematic structural diagram of a combined lance for hydrogen-rich solid fuel and hydrogen-rich gas fuel in accordance with the present invention;
FIG. 3 is a schematic cross-sectional view of a lance body of a combined hydrogen-rich solid fuel and hydrogen-rich gas fuel lance of the present invention;
FIG. 4 is a longitudinal sectional structural diagram of a combined lance head of a hydrogen-rich solid fuel and hydrogen-rich gas fuel lance according to the present invention;
FIG. 5 is a partial enlarged view of a lance head of a hydrogen-rich solid fuel and hydrogen-rich gas fuel combined lance of the present invention;
in the figure: 1-a spray gun; 2-belly pipe; 3-tuyere cover; 4-tuyere sleeve center line; 5-hydrogen rich solid fuel nozzle centerline; 6-installing a spray gun flange; 7-hydrogen-rich solid fuel injection nozzle; 8-a hydrogen-rich gas fuel injection connecting pipe; 9-auxiliary gas purging connection pipe; 10-a hydrogen rich solid fuel nozzle; 11-a hydrogen rich gas fuel lance; 12-a hydrogen rich gas fuel channel; 13-a hydrogen-rich gas fuel outlet; 14-a hydrogen rich solid fuel lance outlet; 15-hydrogen rich gas fuel exit angle (15).
Detailed Description
The present invention is further described in detail below with reference to examples so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and thus the scope of the present invention is more clearly and clearly defined. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The device comprises a spray gun (1), a belly pipe (2) and an air port sleeve (3); the spray gun (1) consists of a hydrogen-rich solid fuel spray pipe (10) and a hydrogen-rich gas fuel spray pipe (11), the hydrogen-rich gas fuel spray pipe (11) is arranged around the hydrogen-rich solid fuel spray pipe (10), and preferably, the hydrogen-rich solid fuel spray pipe (10) and the hydrogen-rich gas fuel spray pipe (11) are coaxially arranged; the tail end of the spray gun (1) is provided with a hydrogen-rich gas fuel nozzle (13) and a hydrogen-rich solid fuel nozzle (14), the side wall of the tail end of the hydrogen-rich gas fuel spray pipe (11) is provided with the hydrogen-rich gas fuel nozzle (13), and the outlet end of the hydrogen-rich solid fuel spray pipe (10) protrudes out of the hydrogen-rich gas fuel spray pipe (11) to form the hydrogen-rich solid fuel nozzle (14). The design that the hydrogen-rich solid fuel spray pipe (10) outlet end protrudes the hydrogen-rich gas fuel spray pipe (11) to form the hydrogen-rich solid fuel nozzle (14) can not influence the use effect of the whole spray gun even if the hydrogen-rich solid fuel generates certain abrasion on the hydrogen-rich solid fuel spray pipe outlet end in the production process, and solves the problems that the hydrogen-rich solid fuel nozzle is easy to abrade and has short service life. And the outlet end of the hydrogen-rich solid fuel spray pipe protrudes out of the design of the hydrogen-rich gas fuel spray pipe, so that the hydrogen-rich gas can be firstly contacted with hot air and mixed and combusted, the amount of carbon black generated by cracking the hydrogen-rich gas is reduced, the improvement of the air permeability of the blast furnace is facilitated, and the production of the blast furnace is stabilized. And the temperature of high-temperature oxygen-containing gas generated after the hydrogen-rich gas is combusted with hot air is higher than that of the hot air, and then the hydrogen-rich gas is contacted with the injected hydrogen-rich solid fuel, so that the ignition and combustion of the hydrogen-rich solid fuel can be further promoted, the combustion rate of the injected hydrogen-rich solid fuel is improved, and the smelting condition of the blast furnace is improved.
As a preferred embodiment of the invention, the tail end of the spray gun (1) is bent to form a certain angle between the tail end of the spray gun and the main body of the spray gun, so that the outlet center line (5) of the hydrogen-rich solid fuel spray pipe and the center line (4) of the tuyere sleeve can be overlapped to reduce the abrasion of the tuyere sleeve during the injection of the hydrogen-rich solid fuel.
In a preferred embodiment of the invention, the lance (1) is obliquely inserted into the side wall of the belly pipe (2), the lance (1) and the belly pipe are fixedly connected through a lance mounting flange (6), the belly pipe (2) is in spherical contact connection with the tuyere sleeve (3), and the lance (1) penetrates through the belly pipe (2) and extends to the tuyere sleeve (3).
As a preferable embodiment of the invention, the outer diameter of the hydrogen-rich solid fuel spray pipe (10) is smaller than the inner diameter of the hydrogen-rich gas fuel spray pipe (11), the head end and the tail end of the hydrogen-rich gas fuel spray pipe (11) are connected with the outer wall of the hydrogen-rich solid fuel spray pipe (10) in a sealing way, and a loop formed between the hydrogen-rich gas fuel spray pipe (11) and the hydrogen-rich solid fuel spray pipe (10) is a hydrogen-rich gas fuel channel (12).
As a preferred embodiment of the invention, the value of the hydrogen-rich gas fuel outlet angle (15) between the central line of the hydrogen-rich gas fuel nozzle (13) and the central line of the hydrogen-rich solid fuel nozzle (14) along the blowing direction is 75-135 degrees, more preferably the value of the hydrogen-rich gas fuel outlet angle (15) is 90-120 degrees, at the moment, the ejecting direction of the hydrogen-rich gas and the blowing direction of the hot air are close to be vertical to each other (the hydrogen-rich gas fuel outlet angle is close to 90 degrees) or the ejecting direction of the hydrogen-rich gas is along the inclined backward direction (the hydrogen-rich gas fuel outlet angle is more than 90 degrees) relative to the blowing direction of the hot air. And the temperature of high-temperature oxygen-containing gas generated after the hydrogen-rich gas is fully combusted with hot air is higher than that of the hot air, and then the hydrogen-rich gas is contacted with the injected hydrogen-rich solid fuel, so that the ignition and combustion of the hydrogen-rich solid fuel are facilitated more easily, the combustion rate of the injected hydrogen-rich solid fuel can be further improved by arranging the outlet angle of the hydrogen-rich gas, and the smelting condition of the blast furnace is improved.
In a preferred embodiment of the invention, the inlet end of the hydrogen-rich gas fuel channel (12) is connected with the hydrogen-rich gas fuel injection connecting pipe (8) and the auxiliary gas purging connecting pipe (9), and the inlet end of the hydrogen-rich solid fuel spray pipe (10) is connected with the hydrogen-rich solid fuel injection connecting pipe (7).
In a preferred embodiment of the present invention, the hydrogen-rich gas fuel comprises one or more of hydrogen, coal gas, natural gas, artificial gas and liquefied gas, and the hydrogen-rich solid fuel comprises one or more of bituminous coal, anthracite, lean coal, lignite and semicoke.
As a preferred embodiment of the present invention, wherein the hydrogen-rich gas fuel and the hydrogen-rich solid fuel may be injected separately, or simultaneously; when independently jetting hydrogen-rich solid fuel, the hydrogen-rich gas fuel passage can be filled with auxiliary gas through the auxiliary gas purging connecting pipe (9) to cool the spray gun so as to prolong the service life of the spray gun, and the hydrogen-rich gas fuel passage can also be filled with oxygen through the auxiliary gas purging connecting pipe (9), so that the combustion rate of the hydrogen-rich solid fuel can be increased while the spray gun is cooled.
The working principle is as follows: taking coal powder as a hydrogen-rich solid fuel as an example, the primary task of injecting the coal powder and the hydrogen-rich gas is to arrange a coal powder spray gun and a hydrogen-rich gas spray gun in a limited space of an air port sleeve, so that the high-efficiency combustion of the coal powder can be ensured, and the influence of a large amount of carbon black generated by the cracking of the hydrogen-rich gas on the production of a blast furnace can be avoided. The coaxial straight pipe type spray gun has the characteristics of compact structure and convenience in installation, one spray gun can spray coal powder and hydrogen-rich gas simultaneously, the center line of the spray gun head and the center line of the tuyere sleeve coincide to avoid the coal powder spraying stream from scouring the tuyere sleeve, the service life of the tuyere sleeve is prolonged, the smelting efficiency of the blast furnace is improved, and the ironmaking production cost is reduced. For a coaxial straight pipe type spray gun, the outlet end of a pulverized coal spray pipe is in contact with hot air and is easily abraded due to the fact that pulverized coal particles sprayed at a high speed are washed away, and the coaxial straight pipe type spray gun is a limiting part of the service life of the spray gun. And the outlet end of the pulverized coal spray pipe protrudes out of the hydrogen-rich gas spray pipe, so that the hydrogen-rich gas can be firstly contacted with hot air and subjected to mixed combustion, the amount of carbon black generated by cracking the hydrogen-rich gas is reduced, the air permeability of the blast furnace is favorably improved, and the production of the blast furnace is stabilized. And the temperature of high-temperature oxygen-containing gas generated after the hydrogen-rich gas is combusted with hot air is higher than that of the hot air, and then the hydrogen-rich gas is contacted with the injected coal dust, so that the ignition and combustion of the coal dust can be promoted, the combustion rate of the injected coal dust is improved, and the smelting condition of a blast furnace is improved. In addition, in order to further improve the combustion rate of the injected coal dust, the side wall of the hydrogen-rich gas spray pipe is provided with the hydrogen-rich gas spray nozzle, so that the outlet angle of the hydrogen-rich gas is kept between 75 degrees and 135 degrees, the spraying direction of the hydrogen-rich gas is close to the direction of hot air injection at the moment and is mutually perpendicular (the outlet angle of the hydrogen-rich gas fuel is close to 90 degrees) or the spraying direction of the hydrogen-rich gas is along the inclined backward direction (the outlet angle of the hydrogen-rich gas fuel is larger than 90 degrees) relative to the direction of hot air injection. And the temperature of high-temperature oxygen-containing gas generated after the hydrogen-rich gas is fully combusted with hot air is higher than that of the hot air, and then the hydrogen-rich gas is contacted with the injected coal dust, so that ignition and combustion of the coal dust are facilitated more easily, the combustion rate of the injected coal dust can be further improved by arranging the outlet angle of the hydrogen-rich gas, and the smelting condition of the blast furnace is improved. The scheme of the invention realizes the simultaneous injection of the hydrogen-rich solid fuel and the hydrogen-rich gas fuel, solves the problem of low combustion efficiency at the front end of the air port caused by mutual influence when the hydrogen-rich gas and the hydrogen-rich solid fuel are injected simultaneously, prolongs the service life of the spray gun, and has the advantages of strong adaptability of injected fuel types, high combustion efficiency, compact device structure, good spray gun cooling effect, low manufacturing cost and long service life.
While there have been shown and described what are at present the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (8)
1. A combined blowing device for hydrogen-rich solid fuel and hydrogen-rich gas fuel of a blast furnace is characterized by comprising the following components: the spray gun comprises a spray gun (1), a belly pipe (2) and a tuyere sleeve (3);
the spray gun (1) consists of a hydrogen-rich solid fuel spray pipe (10) and a hydrogen-rich gas fuel spray pipe (11), and the hydrogen-rich gas fuel spray pipe (11) is arranged around the hydrogen-rich solid fuel spray pipe (10);
a hydrogen-rich gas fuel nozzle (13) and a hydrogen-rich solid fuel nozzle (14) are arranged at the tail end of the spray gun (1), wherein the hydrogen-rich gas fuel nozzle (13) is positioned on the side wall of the tail end of the hydrogen-rich gas fuel spray pipe (11), and the hydrogen-rich solid fuel nozzle (14) is positioned at the outlet end of the hydrogen-rich solid fuel spray pipe (10) and protrudes out of the hydrogen-rich gas fuel spray pipe (11); and
the hydrogen-rich gas outlet angle (15) between the hydrogen-rich gas nozzle central line of the hydrogen-rich gas fuel nozzle (13) and the hydrogen-rich solid fuel nozzle central line (5) along the injection direction is 75-135 degrees.
2. The combined injection device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 1, wherein: the spray gun (1) is obliquely inserted into the side wall of the belly pipe (2) and fixedly connected with the belly pipe through a spray gun mounting flange (6), the belly pipe (2) is in contact connection with the spherical surface of the tuyere sleeve (3), and the spray gun (1) penetrates through the belly pipe (2) and extends to the tuyere sleeve (3).
3. The combined blowing device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 1, characterized in that: the hydrogen-rich gas fuel spray pipe (11) and the hydrogen-rich solid fuel spray pipe (10) are coaxially arranged, the outer diameter of the hydrogen-rich solid fuel spray pipe (10) is smaller than the inner diameter of the hydrogen-rich gas fuel spray pipe (11), the head end and the tail end of the hydrogen-rich gas fuel spray pipe (11) are connected with the outer wall of the hydrogen-rich solid fuel spray pipe (10) in a sealing mode, and a loop formed between the hydrogen-rich gas fuel spray pipe (11) and the hydrogen-rich solid fuel spray pipe (10) is a hydrogen-rich gas fuel channel (12).
4. The combined injection device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 1, wherein: the outlet angle (15) of the hydrogen-rich gas is 90-120 degrees.
5. The combined blowing device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 3, characterized in that: the inlet end of the hydrogen-rich gas fuel channel (12) is connected with a hydrogen-rich gas fuel injection connecting pipe (8) and an auxiliary gas purging connecting pipe (9), and the inlet end of the hydrogen-rich solid fuel spray pipe (10) is connected with a hydrogen-rich solid fuel injection connecting pipe (7).
6. The combined injection device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 1, wherein: a certain angle is formed between the tail end of the spray gun (1) and the main body of the spray gun, so that the center line (5) of the hydrogen-rich solid fuel nozzle (14) is superposed with the center line (4) of the tuyere sleeve (3).
7. The combined injection device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 1, wherein: the hydrogen-rich gas fuel comprises one or more mixed gas of hydrogen, coal gas, natural gas, artificial gas and liquefied gas, and the hydrogen-rich solid fuel comprises one or more mixture of bituminous coal, anthracite, lean coal, lignite and semicoke.
8. The combined injection device of the blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel as claimed in claim 5, wherein: the hydrogen-rich gas fuel and the hydrogen-rich solid fuel are respectively and independently injected or simultaneously injected; when the hydrogen-rich solid fuel is independently blown, nitrogen is introduced into the hydrogen-rich gas fuel channel, or oxygen is introduced into the hydrogen-rich gas fuel channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210412295.8A CN114908201B (en) | 2022-04-19 | 2022-04-19 | Blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel combined type injection device |
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| CN202210412295.8A CN114908201B (en) | 2022-04-19 | 2022-04-19 | Blast furnace hydrogen-rich solid fuel and hydrogen-rich gas fuel combined type injection device |
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| CN114908201B true CN114908201B (en) | 2023-02-03 |
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| JP4747662B2 (en) * | 2005-05-06 | 2011-08-17 | Ｊｆｅスチール株式会社 | Lance for blowing gas reducing material, blast furnace and blast furnace operating method |
| CN102485913A (en) * | 2010-12-01 | 2012-06-06 | 张昭贵 | Method and device for blast furnace to blow coal powder |
| CN103981311B (en) * | 2014-04-29 | 2016-01-20 | 中冶南方工程技术有限公司 | Blast-furnace coal powder injection rifle |
| CN113151621B (en) * | 2021-03-31 | 2022-10-14 | 中冶南方工程技术有限公司 | Blast furnace hydrogen-rich coal injection combined process |
| CN113005250A (en) * | 2021-04-21 | 2021-06-22 | 河北燕钢科技有限公司 | System and working process for preparing hydrogen-rich gas and applying hydrogen-rich gas to blast furnace injection |
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