CN216445402U - Air inlet structure of blast furnace hearth - Google Patents

Abstract

The utility model discloses a blast furnace hearth air inlet structure, which relates to the technical field of blast furnaces and comprises a furnace body, wherein a flow guide cover is fixed on one side of the outside of the furnace body, a hot blast furnace is arranged on one side of the flow guide cover, an exhaust pipe is arranged between the flow guide cover and the hot blast furnace, one end of the exhaust pipe is connected with the flow guide cover, the other end of the exhaust pipe is connected with an air outlet of the hot blast furnace, an air distribution mechanism for changing the air flow direction is arranged inside the flow guide cover, the included angle of a flow guide plate inside the flow guide cover can be changed by controlling the rotation direction of a motor and matching with a shaft lever, so that the direction of the flow guide cover when the air is sprayed out is changed, the air distribution inside the furnace body is more uniform, the combustion efficiency of fuel in the furnace body is improved, and cold air can flow through the outer surface of the motor when the air inlet pipe wraps the outside the motor, and further, the hot blast stove can play a role in heat dissipation for the motor while extracting air.

Description

Air inlet structure of blast furnace hearth

Technical Field

The utility model relates to the technical field of blast furnaces, in particular to a blast furnace hearth air inlet structure.

Background

The blast furnace is made of steel plate as furnace shell, refractory brick lining is built in the shell, the blast furnace body is divided into furnace throat, furnace body, furnace waist, furnace belly and furnace hearth from top to bottom, and the iron-making mode of the blast furnace is the most of the total iron production in the world due to the advantages of good economic index, simple process, large production capacity, high labor production efficiency, low energy consumption and the like.

However, the air inlet structure of the blast furnace still has defects when in use. For example, when the air flow enters the blast furnace, it is difficult to control the direction of the air flow, so that the air is unevenly distributed in the furnace body, and it is difficult to sufficiently support the combustion of the fuel in the furnace body. In addition, air needs to be heated by the hot blast stove before entering the furnace body, and because the heat in the air heating process is provided by the hot blast stove and the heat of the flue gas of the furnace body is difficult to utilize, the air inlet operation of the blast furnace is caused, and the required energy consumption is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a blast furnace hearth air inlet structure to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a blast furnace hearth air inlet structure comprises a furnace body, wherein a flow guide cover is fixed on one side of the outside of the furnace body, a hot blast furnace is arranged on one side of the flow guide cover, an exhaust pipe is arranged between the flow guide cover and the hot blast furnace, one end of the exhaust pipe is connected with the flow guide cover, the other end of the exhaust pipe is connected with an air outlet of the hot blast furnace, and an air distribution mechanism for changing the air flow direction is arranged inside the flow guide cover;

the air distribution mechanism comprises a guide plate and a motor, the guide plate is arranged inside the air guide sleeve, the motor is installed outside the air guide sleeve, two ends of the guide plate are rotatably connected with the air guide sleeve through shaft rods, one of the shaft rods extends to the outside of the air guide sleeve, and the shaft rods are connected with a transmission shaft of the motor through gear meshing.

Preferably, an air inlet pipe is installed on an air inlet channel of the hot blast stove, the motor is wrapped in the air inlet pipe, and a first air valve is installed outside the air outlet pipe.

Preferably, a sleeve is fixed outside the air inlet pipe between the motor and the hot blast stove, and the top and the bottom of the sleeve are respectively connected with a smoke exhaust pipe and a smoke inlet pipe.

Preferably, the sheathed tube external fixation has fixed pipe, fixed pipe is linked together with the sleeve pipe, outside one side of fixed pipe is connected with the connecting pipe, the end of connecting pipe is towards one side of motor, and the end and the intake pipe of connecting pipe are linked together, the outside of intake pipe is located installs the second blast gate between the end of connecting pipe and the sleeve pipe, the internally mounted of fixed pipe has a plurality of spray tube, the spray tube extends to sheathed tube inside, and the end of spray tube installs the check valve.

Preferably, the fan is installed for the one end of second blast gate in the outside of connecting pipe, a plurality of the spray tube is annular array distribution, and the equal slope of spray tube is towards the outer wall of intake pipe.

Preferably, the outer wall of the sleeve is provided with a discharging hole, a baffle is arranged outside the discharging hole, and the baffle and the sleeve are fixed through bolts.

Compared with the prior art, the utility model has the beneficial effects that:

1. this blast furnace hearth air intake structure, through the rotation direction of control motor to the cooperation axostylus axostyle can change the contained angle of guide plate in the inside of kuppe, and then the direction when changing kuppe blowout air, so that the inside air distribution of furnace body is more even, thereby improves the combustion efficiency of fuel in the furnace body.

2. This blast furnace hearth inlet structure utilizes the parcel at the outside intake pipe of motor, and when the intake pipe inhaleed cold air, the surface of motor can be flowed through to cold air, and then when the hot-blast furnace extraction air, can also play radiating effect to the motor.

3. This blast furnace hearth inlet structure lets in into the tobacco pipe with the flue gas that the inside fuel burning of furnace body produced, and later the higher flue gas of temperature can get into the cavity between sleeve pipe and the intake pipe, and then heats the intake pipe, improves the temperature of the inside cold air of intake pipe, consequently, required energy when can further reducing hot-blast stove heating cold air to make the whole more energy can be saved of device.

4. This blast furnace hearth inlet structure closes the second blast gate and opens the fan, makes the air pass through the intake pipe and gets into in the connecting pipe to spray from the spray tube in the fixed tube, and then make flue gas debris drop from the intake pipe, improved the convenient degree when intake pipe outer wall is clean greatly, so that the heat of flue gas can be absorbed to the long-term efficient of intake pipe.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a sectional view of the pod of embodiment 1;

FIG. 3 is a sectional view of an intake pipe in embodiment 1;

FIG. 4 is a schematic structural view of embodiment 2;

fig. 5 is a schematic view of the internal structure of the socket in embodiment 2.

In the figure: 1. a furnace body; 2. a pod; 3. an exhaust pipe; 4. a first air valve; 5. a hot blast stove; 6. an air inlet pipe; 7. a baffle; 8. a motor; 9. a shaft lever; 10. a fan; 11. a nozzle; 12. a second air valve; 13. a smoke exhaust pipe; 14. a sleeve; 15. a baffle plate; 16. a discharge hole; 17. a smoke inlet pipe; 18. a fixed tube; 19. and (4) connecting the pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element 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, such as "connected," which may be fixedly connected, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 3, the air inlet structure of the blast furnace hearth according to the embodiment includes a furnace body 1, a dome 2 is fixed on one side of the outside of the furnace body 1, a hot-blast stove 5 is arranged on one side of the dome 2, an exhaust pipe 3 is arranged between the dome 2 and the hot-blast stove 5, one end of the exhaust pipe 3 is connected with the dome 2, the other end of the exhaust pipe 3 is connected with an air outlet of the hot-blast stove 5, after cold air is heated by the hot-blast stove 5, the cold air is sent into the furnace body 1 through the exhaust pipe 3 and the dome 2 to perform combustion supporting operation, and an air distribution mechanism for changing the air flow direction is arranged inside the dome 2; gas distribution mechanism includes guide plate 7 and motor 8, guide plate 7 sets up in the inside of kuppe 2, motor 8 installation and kuppe 2's outside, guide plate 7's both ends are all rotated with kuppe 2 through axostylus axostyle 9 and are connected, one of them axostylus axostyle 9 extends to the outside of kuppe 2, and axostylus axostyle 9 and motor 8's transmission shaft passes through gear engagement and connects, direction of rotation through control motor 8, and cooperation axostylus axostyle 9, can change guide plate 7 at the inside contained angle of kuppe 2, and then the direction when changing 2 blowout air of kuppe, so that the inside air distribution of furnace body 1 is more even, improve the combustion efficiency of fuel in the furnace body 1.

Specifically, install intake pipe 6 on the inlet air duct of hot-blast furnace 5, including intake pipe 6 wraps up motor 8, when intake pipe 6 inhales cold air, cold air can flow through motor 8's surface, and then play radiating effect to motor 8, with extension motor 8's practical life, the externally mounted of blast pipe 3 has first blast gate 4, when furnace body 1 need not add the air, close the exhaust process of blast pipe 3 through first blast gate 4, put and prevent the inside air reflux of furnace body 1, ensure that the air can be at the combustion-supporting of furnace body 1's inside stability.

The using method of the embodiment comprises the following steps: when the hot blast stove works, cold air is extracted from the hot blast stove 5 through the air inlet pipe 6, and then the cold air is heated by the hot blast stove 5 and then is sent into the furnace body 1 through the exhaust pipe 3 and the flow guide sleeve 2 to carry out combustion-supporting operation;

through the rotation direction of the control motor 8 and the matching shaft rod 9, the included angle of the guide plate 7 in the guide cover 2 can be changed, and then the direction of the guide cover 2 during air spraying is changed, so that the air distribution in the furnace body 1 is more uniform, the combustion efficiency of fuel during combustion in the furnace body 1 is improved, and more energy is saved.

Example 2

The structure of the air inlet structure of the blast furnace hearth in the embodiment is basically the same as that of the air inlet structure of the blast furnace hearth in the embodiment 1, and the difference is that: a sleeve 14 is fixed outside the air inlet pipe 6 between the motor 8 and the hot blast stove 5, the top and the bottom of the sleeve 14 are respectively connected with a smoke exhaust pipe 13 and a smoke inlet pipe 17, a fixed pipe 18 is fixed outside the sleeve 14, the fixed pipe 18 is communicated with the sleeve 14, one side outside the fixed pipe 18 is connected with a connecting pipe 19, the tail end of the connecting pipe 19 faces one side of the motor 8, and the tail end of the connecting pipe 19 is communicated with the air inlet pipe 6, smoke generated by fuel combustion inside the stove body 1 is introduced into the smoke inlet pipe 17, then the smoke with higher temperature enters a cavity between the sleeve 14 and the air inlet pipe 6, the air inlet pipe 6 is further heated, the temperature of cold air inside the air inlet pipe 6 is improved, therefore, energy required when the hot blast stove 5 heats the cold air can be further reduced, a second air valve 12 is installed outside the air inlet pipe 6 between the tail end of the connecting pipe 19 and the sleeve 14, fixed pipe 18's internally mounted has a plurality of spray tube 11, spray tube 11 extends to sleeve pipe 14's inside, and the check valve is installed to spray tube 11's end, the check valve can avoid the flue gas to get into spray tube 11, when clearing up the flue gas debris between intake pipe 6 and the sleeve pipe 14, close second blast gate 12, later open fan 10, make the air pass through intake pipe 6 and get into in the connecting pipe 19, later the air can get into fixed pipe 18 and spout from spray tube 11, and then spout the flue gas debris, make the flue gas debris drop from intake pipe 6 (refer to fig. 4 and 5).

Specifically, fan 10 is installed for the one end of second blast gate 12 in the outside of connecting pipe 19, utilizes fan 10 can further strengthen the pressure when intake pipe 6 air flows, and a plurality of spray tube 11 is the annular array and distributes, and spray tube 11 all inclines towards the outer wall of intake pipe 6 to the air passes through spray tube 11 blowout back, and is even with the adnexed debris jetting of intake pipe 6 outer wall clean.

Furthermore, the outer wall of the sleeve 14 is provided with a discharging hole 16, a baffle plate 15 is arranged outside the discharging hole 16, the baffle plate 15 and the sleeve 14 are fixed through bolts, after sundries in the flue gas are accumulated between the sleeve 14 and the air inlet pipe 6, the baffle plate 15 can be detached regularly, and the sundries are cleaned through the discharging hole 16.

The using method of the embodiment comprises the following steps: the flue gas generated by burning the fuel in the furnace body 1 is introduced into the flue gas inlet pipe 17, then the flue gas with higher temperature enters the cavity between the sleeve 14 and the air inlet pipe 6, the air inlet pipe 6 is further heated, the temperature of the cold air in the air inlet pipe 6 is increased, and then the flue gas after absorbing heat is discharged through the smoke exhaust pipe 13;

the temperature of the cold air in the air inlet pipe 6 is raised by utilizing the heat of the flue gas, so that the energy required by the hot blast stove 5 for heating the cold air can be further reduced, and the energy of the whole device is more saved;

when clearing up the flue gas debris between intake pipe 6 and the sleeve pipe 14, can close second blast gate 12, later open fan 10, make the air pass through intake pipe 6 and get into in the connecting pipe 19, later the air can get into fixed pipe 18 and spout from spray tube 11, and then spout flue gas debris, make flue gas debris drop from intake pipe 6, improved the convenient degree when 6 outer walls of intake pipe are clean greatly, so that intake pipe 6 can the heat of long-term efficient absorption flue gas.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a blast furnace hearth air intake structure, includes furnace body (1), its characterized in that: a flow guide cover (2) is fixed on one side of the outside of the furnace body (1), a hot blast furnace (5) is arranged on one side of the flow guide cover (2), an exhaust pipe (3) is arranged between the flow guide cover (2) and the hot blast furnace (5), one end of the exhaust pipe (3) is connected with the flow guide cover (2), the other end of the exhaust pipe (3) is connected with an air outlet of the hot blast furnace (5), and an air distribution mechanism for changing the air flow direction is arranged in the flow guide cover (2);

the gas distribution mechanism comprises a guide plate (7) and a motor (8), the guide plate (7) is arranged inside the air guide sleeve (2), the motor (8) is installed outside the air guide sleeve (2), two ends of the guide plate (7) are rotatably connected with the air guide sleeve (2) through shaft rods (9), one of the shaft rods (9) extends to the outside of the air guide sleeve (2), and transmission shafts of the shaft rods (9) and the motor (8) are connected through gear meshing.

2. The blast furnace hearth gas inlet structure according to claim 1, wherein: an air inlet pipe (6) is installed on an air inlet channel of the hot blast stove (5), the motor (8) is wrapped in the air inlet pipe (6), and a first air valve (4) is installed outside the exhaust pipe (3).

3. The blast furnace hearth gas inlet structure according to claim 2, wherein: and a sleeve (14) is fixed between the motor (8) and the hot blast stove (5) outside the air inlet pipe (6), and the top and the bottom of the sleeve (14) are respectively connected with a smoke exhaust pipe (13) and a smoke inlet pipe (17).

4. The blast furnace hearth gas inlet structure according to claim 3, wherein: the outside of sleeve pipe (14) is fixed with fixed pipe (18), fixed pipe (18) are linked together with sleeve pipe (14), outside one side of fixed pipe (18) is connected with connecting pipe (19), the end of connecting pipe (19) is towards one side of motor (8), and the end and intake pipe (6) of connecting pipe (19) are linked together, second blast gate (12) are installed to the outside of intake pipe (6) between the end that is located connecting pipe (19) and sleeve pipe (14), the internally mounted of fixed pipe (18) has a plurality of spray tube (11), spray tube (11) extend to the inside of sleeve pipe (14), and the check valve is installed to the end of spray tube (11).

5. The blast furnace hearth gas inlet structure according to claim 4, wherein: the fan (10) is installed for the one end of second blast gate (12) in the outside of connecting pipe (19), a plurality of spray tube (11) are the annular array and distribute, and spray tube (11) all incline towards the outer wall of intake pipe (6).

6. The blast furnace hearth gas inlet structure according to claim 5, wherein: the outer wall of the sleeve (14) is provided with a discharging hole (16), a baffle (15) is arranged outside the discharging hole (16), and the baffle (15) and the sleeve (14) are fixed through bolts.

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