Blast furnace air supply device capable of adjusting air supply area

Abstract

The blast furnace air supply device capable of adjusting the air supply area comprises an air supply pipe, an air delivery neck pipe is connected to the air supply pipe, the air delivery neck pipe extends into a blast furnace, a ventilation notch is formed in the blast furnace, and the air delivery neck pipe penetrates through the ventilation notch to extend into the blast furnace. A control module in the electric adjusting mechanism is controlled, an electric telescopic rod is controlled to press down a valve plate in a control box, or the electric telescopic rod is controlled to lift the control box, so that the valve plate is controlled to ascend and descend, an air inlet hole in the air inlet mechanism is blocked and opened through the valve plate, the air supply area is controlled, and the air supply efficiency is improved. Control over air intake in the blast furnace is improved, and the using safety and production efficiency of the blast furnace are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace air supply, in particular to a blast furnace air supply device capable of adjusting the air supply area. Background Art

[0002] Blowing air from the air supply device into the blast furnace is a very important process. With the change of the lower air supply system, it will have a huge impact on the smelting process of the blast furnace. Changing the air volume can change the wind speed and the blast kinetic energy, thereby affecting the distribution of coal gas flow in the lower part of the blast furnace, which will have a great impact on the smooth operation of the blast furnace.

[0003] The operation of a blast furnace is a complex and changeable process. First of all, due to changes in the raw materials and fuels of the blast furnace, changes in equipment, and changes in other factors such as external logistics supply, the air supply system may be required to be adjusted accordingly. These changes in the external operating environment are inevitable, so the blast furnace needs to reduce the air flow to maintain normal production. Secondly, changes in the blast furnace are also frequent. For example, if the furnace is not active, the air volume needs to be reduced and the furnace needs to be gradually activated. In the above situations, it is not enough to reduce the air flow alone. It is also necessary to reduce the air supply area at the same time to achieve a larger wind speed and a larger blast kinetic energy under a smaller air volume. For many years, the traditional practice of the ironmaking industry has been to use refractory materials to cover the air supply device after the blast furnace is shut down. Block the tuyere at the front end, and then poke open the tuyere one by one after the external situation returns to normal or the condition of the blast furnace improves. There are generally two traditional ways to poke the tuyere. The first way is to poke the tuyere with the wind off, and the second way is to poke the tuyere with the wind on without stopping the wind. This operation will bring many hazards: first, frequent wind-off operations for blocking and poking the tuyere will increase the chance of the edge airflow scouring the furnace wall, thereby reducing the life of the blast furnace body; second, frequent wind-off operations will reduce the output of the blast furnace and affect the economic benefits of the blast furnace; third, when poking the tuyere with the wind on, a large amount of high-temperature coal gas will be generated at the tuyere, and the noise is extremely high, which will cause insecurity to the operators and pollution to the environment.

[0004] Therefore, in view of the shortcomings of the prior art, it is necessary to provide a blast furnace air supply device with an adjustable air supply area to solve the shortcomings of the prior art. Utility Model Content

[0005] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a blast furnace air supply device with adjustable air supply area, which guides external gas through a vent pipe and a gas delivery neck pipe, and controls the control module in the electric adjustment mechanism to control the electric telescopic rod to press down the valve plate in the control box, or to control the electric telescopic rod to lift the control box, thereby controlling the valve plate to rise and fall, and the air intake hole in the air intake mechanism is blocked and opened through the valve plate, so as to control the air supply area, improve the control of air intake in the blast furnace, and improve the safety and production efficiency of the blast furnace.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical means.

[0007] Provided is a blast furnace air supply device with adjustable air supply area, comprising an air supply pipe, a gas delivery neck pipe connected to the air supply pipe, the gas delivery neck pipe extending into the blast furnace, a ventilation slot opened on the blast furnace, the gas delivery neck pipe passing through the ventilation slot to the inside of the blast furnace, an air intake mechanism installed on the gas delivery neck pipe, an electric adjustment mechanism connected to the top of the air intake mechanism, and a high-pressure nozzle installed at one end of the air intake mechanism;

[0008] The air intake mechanism includes a ventilation joint, the ventilation joint has air intake holes evenly opened inside, vertical grooves are arranged between the air intake holes, a movable valve plate is inserted inside the vertical grooves, a fixed block is installed on the top of the movable valve plate, a control box is arranged outside the fixed block, and a telescopic spring is connected between the control box and the fixed block.

[0009] Specifically, the electric adjustment mechanism includes a mounting part, a hollow groove is opened at the bottom end of the mounting part, a control module is arranged inside the mounting part, the control module is connected to the telescopic motor, an electric telescopic rod is connected below the telescopic motor, and a pushing head is installed at the end of the electric telescopic rod.

[0010] Specifically, the push head is a T-shaped structure, the push head is installed inside the control box and contacts the fixed block, and the control box is installed inside the hollow groove.

[0011] Specifically, an anti-collision block is installed at the bottom of the vertical groove, an anti-collision groove is arranged at the top of the anti-collision block, and the anti-collision groove cooperates with the valve plate.

[0012] Specifically, a threaded boost groove is provided inside the high-pressure nozzle, and the threaded boost groove corresponds to the air inlet hole.

[0013] The utility model guides external gas through the ventilation pipe and the gas delivery neck pipe, and manipulates the control module in the electric adjustment mechanism to control the electric telescopic rod to press down the valve plate in the control box, or control the electric telescopic rod to lift the control box, thereby controlling the valve plate to rise and fall, and the air intake hole in the air intake mechanism is blocked and opened through the valve plate, the air supply area is controlled, the control of the air intake in the blast furnace is improved, and the safety and production efficiency of the blast furnace are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0015] Figure 1 The utility model is a front view of a blast furnace air supply device with adjustable air supply area.

[0016] Figure 2It is a partial enlarged view of an air intake mechanism in a blast furnace air supply device with adjustable air supply area according to the utility model.

[0017] Figure 3 It is a partial enlarged view of an electric regulating mechanism in a blast furnace air supply device with adjustable air supply area according to the utility model.

[0018] from Figures 1 to 3 Including:

[0019] 1. Air supply pipe;

[0020] 2. Gas delivery neck tube;

[0021] 3. Blast furnace;

[0022] 4. Ventilation slots;

[0023] 5. Air intake mechanism;

[0024] 6. Electric adjustment mechanism;

[0025] 7. High pressure nozzle;

[0026] 8. Ventilation section;

[0027] 9. Air intake hole;

[0028] 10. Vertical slot;

[0029] 11. Movable valve plate;

[0030] 12. Fixed block;

[0031] 13. Control box;

[0032] 14. Telescopic spring;

[0033] 15. Installation department;

[0034] 16. Hollow groove;

[0035] 17. Control module;

[0036] 18. Telescopic motor;

[0037] 19. Electric telescopic rod;

[0038] 20. Push head;

[0039] 21. Anti-collision block;

[0040] 22. Anti-collision groove;

[0041] 23. Threaded boost groove. DETAILED DESCRIPTION

[0042] The utility model is further described in conjunction with the following embodiments.

[0043] Example 1.

[0044] like Figure 1-3 As shown, a blast furnace air supply device with adjustable air supply area includes an air supply pipe 1, the air supply pipe 1 is connected with a gas delivery neck pipe 2, the gas delivery neck pipe 2 extends into the interior of the blast furnace 3, the blast furnace 3 is provided with a ventilation slot 4, the gas delivery neck pipe 2 passes through the ventilation slot 4 to the interior of the blast furnace 3, an air intake mechanism 5 is installed on the gas delivery neck pipe 2, the top of the air intake mechanism 5 is connected with an electric adjustment mechanism 6, and one end of the air intake mechanism 5 is installed with a high-pressure nozzle 7.

[0045] The gas supply pipe 1 and the gas supply neck pipe 2 guide the gas into the blast furnace 3. The gas controls the air intake mechanism 5 through the electronically controlled regulating mechanism to adjust the air supply area of ​​the air intake mechanism 5, and finally is ejected into the blast furnace 3 through the high-pressure nozzle 7, thereby achieving the regulating effect on the air supply mechanism.

[0046] The air intake mechanism 5 includes a ventilation node 8, inlet holes 9 are evenly opened inside the ventilation node 8, vertical grooves 10 are arranged between the air intake holes 9, a movable valve plate 11 is inserted into the vertical grooves 10, a fixed block 12 is installed on the top of the movable valve plate 11, a control box 13 is arranged outside the fixed block 12, and a telescopic spring 14 is connected between the control box 13 and the fixed block 12.

[0047] The air inlet holes 9 in the air inlet mechanism 5 can allow gas to pass through, and the movable valve plate 11 inserted in the vertical groove 10 can block each group of air inlet holes 9. The air supply area can be controlled by adjusting the number of blocked air inlet holes 9. The installation of the fixed block 12 and the control box 13 on the movable valve plate 11 can facilitate the electric control adjustment mechanism to adjust the position of the movable valve plate 11. A telescopic spring 14 is connected between the control box 13 and the fixed block 12 to reduce the buffer between the electric adjustment mechanism 6 and the fixed block 12.

[0048] The electric adjustment mechanism 6 includes a mounting portion 15, a hollow groove 16 is formed at the bottom end of the mounting portion 15, a control module 17 is arranged inside the mounting portion 15, the control module 17 is connected to a telescopic motor 18, an electric telescopic rod 19 is connected below the telescopic motor 18, and a pushing head 20 is installed at the end of the electric telescopic rod 19.

[0049] The control module 17 provided in the mounting portion 15 can receive external instructions to control the driving of the telescopic motor 18 . The telescopic motor 18 controls the extension and retraction of the electric telescopic rod 19 . The push head 20 on the electric telescopic rod 19 can rise and fall with the electric telescopic rod 19 .

[0050] The pushing head 20 is a T-shaped structure. The pushing head 20 is installed inside the control box 13 and contacts the fixed block 12. The control box 13 is installed inside the hollow groove 16. When the pushing head 20 descends, the fixed block 12 is pressed down. The movable valve plate 11 after being pressed down can block the air inlet 9 and reduce the air supply area. When the pushing head 20 is lifted, the entire control box 13 can be lifted through the design of the T-shaped structure, and the fixed head and the movable valve plate 11 are lifted to expose the blocked air inlet 9 and increase the air supply area.

[0051] An anti-collision block 21 is installed at the bottom of the vertical groove 10, and an anti-collision groove 22 is arranged at the top of the anti-collision block 21. The anti-collision groove 22 cooperates with the valve plate. The arrangement of the anti-collision block 21 and the anti-collision groove 22 can provide buffering during the descent of the movable valve plate 11 to prevent the movable valve plate 11 from being damaged by collision when it descends.

[0052] A threaded pressurizing groove 23 is arranged inside the high-pressure nozzle 7, and the threaded pressurizing groove 23 corresponds to the air inlet 9. The gas introduced into the air inlet 9 can be pressurized by the threaded pressurizing groove 23, so that the gas can be ejected into the blast furnace 3.

[0053] During the production process, external gas is diverted through the ventilation pipe and the gas delivery neck pipe 2, and the control module 17 in the electric adjustment mechanism 6 is manipulated to control the electric telescopic rod 19 to press down the valve plate in the control box 13, or to lift the control box 13, thereby controlling the valve plate to rise and fall, and the air intake hole 9 in the air intake mechanism 5 is blocked and opened through the valve plate, the air supply area is controlled, the control of the air intake in the blast furnace 3 is improved, and the safety and production efficiency of the blast furnace 3 are improved.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A blast furnace air supply device with adjustable air supply area, characterized in that: It includes an air delivery pipe, the air delivery pipe is connected to a gas delivery neck pipe, the gas delivery neck pipe extends into the interior of the blast furnace, a ventilation slot is provided on the blast furnace, the gas delivery neck pipe passes through the ventilation slot to the interior of the blast furnace, an air intake mechanism is installed on the gas delivery neck pipe, the top of the air intake mechanism is connected to an electric adjustment mechanism, and a high-pressure nozzle is installed at one end of the air intake mechanism; The air intake mechanism includes a ventilation joint, in which air intake holes are evenly opened inside, vertical grooves are arranged between the air intake holes, a movable valve plate is inserted inside the vertical grooves, a fixed block is installed on the top of the movable valve plate, a control box is arranged outside the fixed block, and a telescopic spring is connected between the control box and the fixed block.

2. A blast furnace air supply device with adjustable air supply area according to claim 1, characterized in that: The electric adjustment mechanism includes a mounting portion, a hollow groove is formed at the bottom end of the mounting portion, a control module is arranged inside the mounting portion, the control module is connected to a telescopic motor, an electric telescopic rod is connected below the telescopic motor, and a pushing head is installed at the end of the electric telescopic rod.

3. A blast furnace air supply device with adjustable air supply area according to claim 2, characterized in that: The pushing head is a T-shaped structure, and is installed inside the control box to contact the fixing block, and the control box is installed inside the hollow groove.

4. A blast furnace air supply device with adjustable air supply area according to claim 1, characterized in that: An anti-collision block is installed at the bottom of the vertical groove, and an anti-collision groove is arranged at the top of the anti-collision block, and the anti-collision groove cooperates with the valve plate.

5. The blast furnace air supply device with adjustable air supply area according to claim 2, characterized in that: A threaded pressure boosting groove is arranged inside the high-pressure nozzle, and the threaded pressure boosting groove corresponds to the air inlet hole.

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