CN215288857U - Blast furnace hearth tuyere raceway - Google Patents

Abstract

The utility model discloses a blast furnace hearth tuyere raceway, including blast furnace body, drippage district, circulation wind storehouse, slag iron storage area, raceway body and intake pipe, blast furnace body lower extreme is separated for drippage district, raceway body and slag iron storage area, raceway body outer wall is provided with the circulation wind storehouse, the inside guide plate that is circular array and distributes that is provided with in circulation wind storehouse, circulation wind storehouse one side outer wall is connected with the intake pipe, the intake pipe deviates from circulation wind storehouse one end and is connected with the air heater, the intake pipe is tangent with circulation wind storehouse outer wall, circulation wind storehouse inner wall is provided with the protection network. The utility model discloses a set up circulation wind storehouse in the outside of the district body that circles round to through the hot-air that pours into along circulation wind storehouse inner wall tangential direction, the cooperation guide plate pours into to the district body inside into that circles round, can make the better drive coke of air current at the inside rotation of the district body that circles round, improves combustion efficiency greatly.

Description

Blast furnace hearth tuyere raceway

Technical Field

The utility model relates to the technical field of blast furnace ironmaking, in particular to a tuyere convolution area of a blast furnace hearth.

Background

With the rapid development of the modern industry, the technology of the iron-making industry has increased, and in the iron-making industry, the most common equipment is a blast furnace, which is also one of the indispensable equipments, iron ore, coke and limestone are loaded from a filter, and preheated air is blown into the blast furnace along the tuyere at the lower part of the furnace circumference. Carbon in the coke is burnt with oxygen blown into the air at high temperature to generate carbon monoxide and hydrogen, and oxygen in the iron ore is removed in the ascending process in the furnace, so that iron is obtained by reduction. The smelted molten iron is discharged from the iron notch. Unreduced impurities in the iron ore are combined with fluxes such as limestone to generate slag, and the slag is discharged from a slag hole. The generated gas is discharged from the top of the furnace, and is used as fuel for hot blast stoves, heating furnaces, coke ovens, boilers and the like after dust removal. The main products of blast furnace smelting are pig iron, and blast furnace slag and blast furnace gas are also by-products.

When air is blown into the blast furnace from the tuyere, airflow and coke convolution can be formed in a convolution area of the blast furnace, so that the tuyere of the blast furnace becomes a convolution area, and the coke in front of the tuyere of the furnace is in a convolution movement under the action of high-speed hot air and is combusted in an area, namely a coke circulation area. The conventional blast furnace tuyere raceway directly adopts a mode of butt joint of tuyeres, air is directly injected into the raceway, although the purpose of air flow and coke raceway can be achieved, the initial air flow and the coke cannot quickly and effectively generate raceway in the raceway, so that air flow disturbance can be generated, the cokes with different particle sizes cannot quickly form regular raceway operation, the combustion rate of partial cokes can be reduced, and the raceway combustion efficiency is not high enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blast furnace hearth tuyere raceway to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a blast furnace hearth wind gap district of circling round, includes blast furnace body, drippage district, circulation wind storehouse, slag iron storage area, the district body of circling round and intake pipe, blast furnace body lower extreme is separated for drippage district, the district body of circling round and slag iron storage area, it is provided with the circulation wind storehouse to circle district body outer wall, the inside guide plate that is circular array and distributes that is provided with in circulation wind storehouse, circulation wind storehouse one side outer wall is connected with the intake pipe, the intake pipe deviates from circulation wind storehouse one end and is connected with the air heater, the intake pipe is tangent with circulation wind storehouse outer wall, circulation wind storehouse inner wall is provided with the protection network.

Preferably, the convolution area body is positioned between the dripping area and the iron slag storage area, the iron slag storage area is positioned at the lower end of the blast furnace body, and the dripping area is positioned above the convolution area body.

Preferably, a first grid is arranged between the dripping area and the rotating area body, and a second grid is arranged between the iron slag storage area and the rotating area body.

Preferably, the air inlet pipe is provided with a valve, and the valve is positioned between the air heater and the circulating air bin.

Preferably, the guide plate is located inside the circulating air bin and distributed anticlockwise, and the outer wall of the guide plate is separated from the inner wall of the circulating air bin.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up circulation wind storehouse in the district body outside of circling round, the hot-air accessible intake pipe of air heater output pours into circulation wind storehouse inside along tangential direction into, the hot-air is inside the circulation wind storehouse produces the circulation flow, and evenly pour into the district body inside of circling round through the space between the guide plate, make the air current form more regular air current circulation at the inner wall of the district body of circling round, thereby the coke that drives different granularity is at the removal of circling round of the inside law of the district body of circling round, the air current injection back has effectively been improved, the air current that the air current can be at the inside production rule of the district body of circling round circles round, can effectively improve the combustion efficiency of coke and avoid the not enough law of orbit of circling round and the coke combustion efficiency who reduces.

Drawings

FIG. 1 is a schematic view of the main sectional structure of the present invention;

FIG. 2 is a schematic view of a partial sectional structure of the circulating air bin of the present invention;

fig. 3 is the utility model discloses a cross-sectional structure schematic diagram that bends of circulation wind storehouse.

In the figure: 1. a blast furnace body; 2. a dripping zone; 3. a circulating air bin; 4. a slag iron storage area; 5. a convolution region body; 6. a first grid; 7. a protective net; 8. a second grid; 9. a baffle; 10. an air inlet pipe; 11. a valve; 12. an air heater.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to fig. 3, the present invention provides an embodiment: the utility model provides a blast furnace crucible wind gap raceway, includes blast furnace body 1, drippage district 2, circulation wind storehouse 3, slag iron storage area 4, raceway body 5 and intake pipe 10, and 1 lower extreme of blast furnace body is separated for drippage district 2, raceway body 5 and slag iron storage area 4, and raceway body 5 is located between drippage district 2 and the slag iron storage area 4, and slag iron storage area 4 is located 1 lower extreme of blast furnace body, and drippage district 2 is located raceway body 5 top.

Be provided with first grid 6 between drippage district 2 and the district body 5 that circles round, be provided with second grid 8 between slag-iron storage area 4 and the district body 5 that circles round, 5 outer walls in district body that circles round are provided with circulation wind storehouse 3, 3 inner walls in circulation wind storehouse are provided with protection network 7, first grid 6, second grid 8 and protection network 7 all adopt the cermet material design, possess high temperature resistant effect, can be applicable to the use of the inside high temperature environment of blast furnace body 1, when air current and coke are in the inside removal that circles round of district body 5 that circles round, protection network 7 can block the coke, avoid the coke to flow back to in the circulation wind storehouse 3, prevent that the coke from causing the jam to the circulation wind storehouse 3 is inside.

The circulating air bin 3 is internally provided with guide plates 9 distributed in a circular array, the outer wall of one side of the circulating air bin 3 is connected with an air inlet pipe 10, one end of the air inlet pipe 10, which is far away from the circulating air bin 3, is connected with an air heater 12, the air inlet pipe 10 is tangent to the outer wall of the circulating air bin 3, the air inlet pipe 10 is provided with a valve 11, the valve 11 is positioned between the air heater 12 and the circulating air bin 3, hot air output by the air heater 12 can be injected into the circulating air bin 3 along the tangential direction through the air inlet pipe 10, the valve 11 can adjust the cross-sectional area of the internal conduction of the air inlet pipe 10, so that the flow of the hot air input by the air inlet pipe 10 and the circulating air bin 3 is adjusted, the guide plates 9 are positioned in the circulating air bin 3 and distributed anticlockwise, the outer wall of the guide plates 9 is separated from the inner wall of the circulating air bin 3, the hot air generates circulating flow in the circulating air bin 3 and is uniformly injected into the convoluting area body 5 through gaps among the guide plates 9, make the air current form more regular air current circulation at the inner wall of district body 5 that circles round to drive the coke of different particle sizes and in the removal of circling round of the inside law of district body 5 that circles round, effectively improved the air current and injected the back, the air current can be at the inside air current that produces the rule of district body 5 that circles round and circle round, can effectively improve the combustion efficiency of coke and avoid circling round the not enough law of orbit and the coke combustion efficiency who reduces.

The working principle is as follows: hot air output by the air heater 12 can be injected into the circulating air bin 3 along the tangential direction through the air inlet pipe 10, the valve 11 can adjust the communicated cross-sectional area inside the air inlet pipe 10, so that the flow of the hot air input into the circulating air bin 3 by the air inlet pipe 10 is adjusted, the hot air generates circulating flow inside the circulating air bin 3, and the hot air is uniformly injected into the convolution region body 5 through gaps among the guide plates 9, so that the air flow forms more regular air flow circulation on the inner wall of the convolution region body 5, coke with different granularity is driven to regularly convolute inside the convolution region body 5, the regular air flow convolution can be generated inside the convolution region body 5 by the air flow after the air flow is injected, the combustion efficiency of the coke can be effectively improved, and the coke combustion efficiency reduced due to the irregular convolution track is avoided;

and when the air current and coke moved around in the inside of the district body of circling round 5, protection network 7 can block coke, avoids the coke to flow back to circulation wind storehouse 3 in, prevents that coke from causing the jam to circulation wind storehouse 3 inside.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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.

Claims (5)

1. The utility model provides a blast furnace crucible wind gap raceway, includes blast furnace body (1), drippage district (2), circulation wind storehouse (3), slag iron storage area (4), raceway body (5) and intake pipe (10), its characterized in that: the blast furnace body (1) lower extreme is separated for drippage district (2), circle round district body (5) and slag iron storage area (4), circle round district body (5) outer wall is provided with circulation wind storehouse (3), inside guide plate (9) that are circular array and distribute that are provided with in circulation wind storehouse (3), circulation wind storehouse (3) one side outer wall is connected with intake pipe (10), intake pipe (10) deviate from circulation wind storehouse (3) one end and are connected with air heater (12), intake pipe (10) are tangent with circulation wind storehouse (3) outer wall, circulation wind storehouse (3) inner wall is provided with protection network (7).

2. The tuyere raceway of a blast furnace hearth according to claim 1, wherein: the rotary area body (5) is positioned between the dripping area (2) and the iron slag storage area (4), the iron slag storage area (4) is positioned at the lower end of the blast furnace body (1), and the dripping area (2) is positioned above the rotary area body (5).

3. The tuyere raceway of a blast furnace hearth according to claim 1, wherein: a first grid (6) is arranged between the dripping area (2) and the rotating area body (5), and a second grid (8) is arranged between the slag iron storage area (4) and the rotating area body (5).

4. The tuyere raceway of a blast furnace hearth according to claim 1, wherein: and a valve (11) is arranged on the air inlet pipe (10), and the valve (11) is positioned between the air heater (12) and the circulating air bin (3).

5. The tuyere raceway of a blast furnace hearth according to claim 1, wherein: the guide plate (9) is located inside the circulating air bin (3) and is distributed anticlockwise, and the outer wall of the guide plate (9) is separated from the inner wall of the circulating air bin (3).

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