Hot blast stove air inlet device and hot blast stove

Abstract

The present invention provides a hot blast furnace air inlet device and a hot blast furnace, comprising a box body, and an air supply chamber, a furnace body and a heat exchange chamber arranged in the box body, wherein a hopper and a fan are arranged in the air supply chamber, and an air regulating tube for regulating and distributing air volume is externally connected to the air outlet end of the fan, and the air regulating tube is sequentially connected to the air guide pipe, the cyclone chamber and the cyclone tube in the furnace body. The present invention improves the structure of the existing hot blast furnace air inlet device, and the improved hot blast furnace air inlet device supplies air to the furnace body through the air guide pipe, the cyclone chamber, the cyclone tube and the material guide channel, and the air guide pipe is arranged at the lower end of the grate, and the air guide holes distributed by the air guide ring pipe and the air guide branch pipe are used to directly supply air to the surrounding of the grate, and the air flow in the cyclone chamber can supply air to the grate from the hollow area between the air guide ring pipe and the air guide branch pipe, so that the oxygen required for fuel combustion on the grate is sufficient.

Description

Technical Field

[0001] The invention relates to the technical field of hot blast stoves, in particular to an air inlet device for a hot blast stove and a hot blast stove. Background Art

[0002] The hot blast furnace generates heat by burning fuel in the furnace body. During the combustion process, the furnace body needs to introduce air to provide oxygen for combustion and transfer heat to the air to form hot air. Existing hot blast furnaces generally introduce air into the ash cleaning chamber through air ducts to flow to the fuel at the top of the grate.

[0003] However, the airflow introduced into the cleaning chamber flows irregularly. First, the airflow cannot evenly provide oxygen around the grate. Too much or too little airflow will lead to incomplete combustion of the fuel. Second, the disturbed airflow will increase the dust particles in the flue gas, making it difficult for the dust particles to fall and collect. Dust will accumulate in the heat exchange pipes, thereby reducing the heat exchange efficiency and increasing the difficulty of subsequent flue gas treatment.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes a hot blast stove air inlet device and a hot blast stove, which solve the above technical problems. Summary of the invention

[0005] The technical problem solved by the present invention is to provide an air inlet device for a hot blast stove and a hot blast stove, so as to solve the problems raised in the above-mentioned background technology.

[0006] The technical problem solved by the present invention is achieved by the following technical scheme: an air inlet device for a hot blast furnace and a hot blast furnace, comprising a box body, and an air supply chamber, a furnace body and a heat exchange chamber arranged in the box body, the air supply chamber is provided with a hopper and a fan, the air outlet end of the fan is externally connected with an air regulating cylinder for adjusting and distributing the air volume, the air regulating cylinder is sequentially connected with an air guide pipe member, a cyclone chamber and a cyclone tube in the furnace body to supply air into the furnace body, the air guide pipe member is installed at the lower end of the grate to uniformly supply air to the grate, the cyclone chamber is installed at the lower end of the air guide pipe member, and an air chamber inlet pipe for supplying air into the cyclone chamber is provided along a tangential direction on one side of the cyclone chamber, so as to generate a swirl in the cyclone chamber, which is helpful for dust separation and falling into a dust cleaning chamber at the lower end of the cyclone chamber, and avoids raising dust particles accumulated in the dust cleaning chamber;

[0007] The air guide pipe comprises an annular air guide ring pipe and air guide branch pipes staggered in the inner cavity of the air guide ring pipe. The upper ends of the air guide ring pipe and the air guide branch pipes are provided with air guide holes. The grate is erected on the upper end of the air guide pipe and is spaced apart from the air guide holes to facilitate the dispersion of the airflow discharged from the air guide holes and evenly supply air to the surroundings of the grate.

[0008] As a further embodiment of the present invention:

[0009] The air guide ring pipe and the air guide branch pipe are respectively provided with an air inlet duct for guiding air into the inner cavity of the air guide ring pipe and the air guide branch pipe, the air inlet duct is externally connected to the air regulating cylinder, the air inlet duct is arranged according to the shape distribution of the air guide ring pipe and the air guide branch pipe, and the air inlet duct is located in the air guide ring pipe and the air guide branch pipe. Both sides are provided with air inlets to blow air into the inner cavity of the air guide ring pipe and the air guide branch pipe, and the lower ends of the air guide ring pipe and the air guide branch pipe are respectively provided with ash dropping grooves to help powder residue fall off;

[0010] The air guide ring tube is provided with an inclined end surface for adjusting the wind direction corresponding to the air inlet, and the inclined end surfaces on both sides of the air guide ring tube are gradually closed downward to guide the wind upward; the air guide branch pipe is provided with an air guide plate for adjusting the wind direction corresponding to the air inlet, the air guide plate is arranged on both sides of the air inlet duct, and the air guide plate is an arc-shaped outwardly expanded structure to guide the wind upward, and gaps are respectively provided between the air guide plate and the inner cavity wall of the air guide branch pipe and the outer wall of the air inlet duct so that the powder residue can be discharged from the gaps.

[0011] As a further embodiment of the present invention:

[0012] A cyclone air duct is provided at the upper end of the cyclone chamber, and an air chamber inlet pipe is arranged in a tangential direction on one side of the cyclone air duct. The lower end of the cyclone chamber is a conical structure, and an ash dropping port is provided at the bottom of the cyclone chamber to communicate with the ash cleaning chamber through the ash dropping port. A conical material guide body is installed at the upper end of the ash dropping port, and the material guide body is fixed to the inner side wall of the ash dropping port through a guide rod. A gap is provided around the material guide body and the inner wall of the cyclone chamber to guide the powder residue into the ash dropping port.

[0013] As a further embodiment of the present invention:

[0014] The cyclone tube is arranged at the outer end of the furnace body and is arranged in a ring along the outer wall of the furnace body. A plurality of cyclone openings are opened on the outer wall of the furnace body in a ring-shaped distribution along the cyclone tube to connect the furnace body cavity and the cyclone tube cavity through the cyclone openings. The cyclone openings are arranged along the tangent of the furnace body cavity wall to generate a swirl in the wind introduced into the furnace body cavity by the cyclone tube. A cyclone inlet pipe is provided at the outer end of the cyclone tube to be connected to the air regulating cylinder through the cyclone inlet pipe.

[0015] As a further embodiment of the present invention:

[0016] A screw feeder is installed at the lower end of the hopper, and a material guide channel connected to the screw feeder is provided in the furnace body. The material guide channel is inclined to deliver the fuel to the grate through the material guide channel. The material guide channel is located in the air supply chamber and is provided with a material guide air port. The outer end of the material guide channel is provided with a material guide air duct connected to the material guide air port. The material guide air duct is externally connected to an air regulating cylinder to blow the fuel into the furnace body through wind, so that the fuel is evenly dispersed to the upper end of the grate.

[0017] As a further embodiment of the present invention:

[0018] The air regulating cylinder is provided with an air regulating mechanism for regulating the distributed air volume, and the air regulating mechanism includes an air regulating frame inserted into the air regulating cylinder, and a control frame arranged on the air supply chamber, the air regulating frame is provided with a rotating member and a valve control member for regulating the air volume, and the control frame is provided with electric cylinders for controlling the movement of the rotating member and the valve control member, so as to realize the automatic adjustment of the air volume by the rotating member and the valve control member;

[0019] The air regulating frame includes a frame rod and end seats installed on both sides of the frame rod. An air inlet tube is also fixedly provided in the middle of the frame rod. The air inlet tube and the air regulating tube cooperate to form an air outlet to connect with the fan through an external air duct. The rotating member is slidably installed on both sides of the air inlet tube. The valve control unit is respectively installed on the end seats on both sides. The air regulating tube is respectively provided with a second air regulating hole and a third air regulating hole corresponding to the rotating member, and the end seat is respectively provided with a first air regulating hole and a fourth air regulating hole corresponding to the valve control unit.

[0020] As a further embodiment of the present invention:

[0021] The rotating member comprises an upper sliding sleeve and a lower sliding sleeve, and a rotating plate arranged on one side of the upper sliding sleeve and the lower sliding sleeve, the outer ends of the upper sliding sleeve and the lower sliding sleeve are respectively provided with sliding rails, and the air inlet cylinder and the end seat are provided with sliding grooves corresponding to the sliding rails, so that the upper sliding sleeve and the lower sliding sleeve are slidably arranged;

[0022] A sealing plate is provided at the outer end of the rotating plate so that the sealing plate is attached to the inner cavity wall of the air regulating cylinder. The sealing plates on both sides of the air regulating frame correspond to the second air regulating hole and the third air regulating hole respectively. A driving handle is installed on the sealing plate. The air regulating cylinder is provided with a corresponding adjusting groove corresponding to the driving handle. The adjusting groove is a waist-shaped structure so that the driving handle passes through the adjusting groove. A first rotating seat is provided at the outer end of the driving handle to be connected to the corresponding electric cylinder on the control frame through the first rotating seat. The output rod of the electric cylinder is rotatably connected to the first rotating seat, and the end of the electric cylinder away from the first rotating seat is rotatably installed on the control frame to control the rotation of the sealing plate, thereby adjusting the opening size of the second air regulating hole and the third air regulating hole to adjust the air volume.

[0023] As a further embodiment of the present invention:

[0024] The valve control unit includes a valve plate rotatably mounted on the inner wall of the end seat, the first air regulating hole and the fourth air regulating hole are respectively arranged in the middle of the end seat, one side of the valve plate is rotatably mounted on the end seat through the valve shaft, the outer end of the valve shaft is provided with a second rotating seat, and is connected to the corresponding electric cylinder on the control frame through the second rotating seat, and the end of the electric cylinder away from the second rotating seat is rotatably mounted on the control frame to control the rotation of the valve plate, thereby adjusting the opening size of the first air regulating hole and the fourth air regulating hole to adjust the air volume; a limit plate is also provided on one side of the inner wall of the end seat to limit the valve plate.

[0025] As a further embodiment of the present invention:

[0026] Limiting grooves are respectively provided on both sides of the frame rod, and limiting convex bodies are provided on the inner wall of the air regulating cylinder corresponding to the limiting grooves, and the limiting convex bodies are inserted in the limiting grooves to limit the rotation of the frame rod in the air regulating cylinder; the sealing plate is an arc-shaped structure, and the outer diameter of the sealing plate is larger than the inner diameter of the frame rod, so that the frame rod can be used to limit the sealing plate, and the frame rod is provided with two groups of annular distribution to limit the movement range of the sealing plate to both sides.

[0027] As a further embodiment of the present invention:

[0028] The first air regulating hole is externally connected to an air supply hose, and is connected to the air chamber inlet pipe through the air supply hose to let air into the cyclone chamber; the second air regulating hole is externally connected to an air supply hose, and is connected to the air inlet duct through the air supply hose, so that the air inlet duct can be used to let air into the air guide ring pipe and the air guide branch pipe; the third air regulating hole is externally connected to an air supply hose, and is connected to the cyclone inlet pipe through the air supply hose to let air into the cyclone pipe; the fourth air regulating hole is externally connected to an air supply hose, and is connected to the material guide air duct through the air supply hose to blow the fuel to be evenly dispersed on the grate.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention improves the structure of the existing hot blast furnace air inlet device, and the improved hot blast furnace air inlet device supplies air to the furnace body through air guide pipes, cyclone chambers, cyclone tubes and material guide channels. The air guide pipes are arranged at the lower end of the grate, and the air guide holes distributed by the air guide ring pipes and the air guide branch pipes are used to directly supply air to the grate. The airflow in the cyclone chamber can supply air to the grate from the hollow area between the air guide ring pipe and the air guide branch pipes, so that the oxygen required for the combustion of fuel on the grate is sufficient. The cyclone chamber allows the airflow at the lower end of the grate to flow in a cyclone manner, and the cyclone tube allows the airflow at the upper end of the grate to flow in a cyclone manner, thereby improving the smoothness of the airflow and helping the dust in the smoke to fall off. The material guide channel uses the wind flow to blow, so that the fuel can be evenly dispersed on the grate, and with the evenly arranged air inlet structure, the combustion efficiency of the fuel can be improved. The air regulating mechanism is provided with separately controlled electric cylinders for the air guide pipe, cyclone chamber, cyclone tube and material guide channel. The air volume introduced into the air regulating cylinder is rationally planned through the air regulating mechanism to improve the dispersion and combustion effect of the fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the internal structure of the box of the present invention;

[0031] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a furnace body of the present invention;

[0032] Figure 3 It is a partial cross-sectional structural schematic diagram of the material guide channel of the present invention;

[0033] Figure 4 It is a partial cross-sectional structural schematic diagram of the air guide pipe of the present invention;

[0034] Figure 5 It is a schematic diagram of the internal structure of the air guide branch pipe of the present invention;

[0035] Figure 6 It is a schematic diagram of the installation structure of the air regulating tube of the present invention;

[0036] Figure 7 It is a partial cross-sectional structural schematic diagram of the air regulating tube of the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of the air regulating frame of the present invention;

[0038] Fig. 9 It is a partial cross-sectional structural schematic diagram of the air regulating frame of the present invention;

[0039] Markings in the figure: 1. Box body; 2. Air adjustment cylinder; 3. Air guide pipe; 4. Cyclone chamber; 5. Cyclone tube; 6. Material guide channel; 7. Air adjustment frame; 8. Control frame; 11. Air supply chamber; 12. Furnace body; 13. Heat exchange chamber; 14. Hopper; 15. Fan; 16. Grate; 17. Ash cleaning chamber; 18. Screw feeder; 20. Limit plate; 21. Adjustment slot; 22. First rotating seat; 23. Valve plate; 24. Second rotating seat; 25. Valve shaft; 26. First air adjustment hole; 27. Second air adjustment hole; 28. Third air adjustment hole; 29. ​​Fourth Air regulating hole; 31. Air guide ring pipe; 32. Air guide branch pipe; 33. Air guide hole; 34. Air inlet duct; 35. Ash drop groove; 36. Inclined end face; 37. Air guide plate; 41. Air chamber inlet pipe; 42. Cyclone air duct; 43. Ash drop mouth; 44. Material guide body; 51. Cyclone mouth; 52. Cyclone inlet pipe; 61. Material guide air mouth; 62. Material guide air duct; 71. Frame rod; 72. End seat; 73. Air inlet cylinder; 74. Upper sliding sleeve; 75. Lower sliding sleeve; 76. Rotating plate; 77. Sealing plate; 78. Driving handle; 79. Limiting groove; 81. Electric cylinder. DETAILED DESCRIPTION

[0040] In order to make the technical means for realizing the present invention, the creative features, the objectives and effects to be achieved easily understood, the present invention is further described below with reference to specific diagrams.

[0041] like Figures 1 to 9As shown, the present embodiment provides an air inlet device for a hot blast furnace and a hot blast furnace, comprising a box body 1, and an air supply chamber 11, a furnace body 12 and a heat exchange chamber 13 arranged in the box body 1, wherein the air supply chamber 11 is provided with a hopper 14 and a fan 15, and the air outlet end of the fan 15 is externally connected with an air regulating cylinder 2 for regulating and distributing the air volume, and the air regulating cylinder 2 is sequentially connected with an air guide pipe 3, a cyclone chamber 4 and a cyclone tube 5 in the furnace body 12 to supply air to the furnace body 12, and the air guide pipe 3 is installed at the lower end of the grate 16 to uniformly supply air to the grate 16, and the cyclone chamber 4 is installed at the lower end of the air guide pipe 3, and an air chamber inlet pipe 41 for supplying air to the cyclone chamber 4 is provided on one side of the cyclone chamber 4 along the tangential direction, so as to generate a swirl in the cyclone chamber 4, which is helpful for dust separation and falling into the dust cleaning chamber 17 at the lower end of the cyclone chamber 4, and avoids raising dust particles accumulated in the dust cleaning chamber 17;

[0042] The air guide pipe 3 includes an annular air guide ring pipe 31 and air guide branch pipes 32 staggered in the inner cavity of the air guide ring pipe 31. The upper ends of the air guide ring pipe 31 and the air guide branch pipes 32 are distributed with air guide holes 33. The grate 16 is erected on the upper end of the air guide pipe 3 and is spaced apart from the air guide holes 33 to facilitate the dispersion of the airflow derived from the air guide holes 33 and evenly supply air to the surroundings of the grate 16.

[0043] Specifically, the fan 15 controls the air intake to the air guide duct 3, the cyclone chamber 4 and the cyclone tube 5 through the adjustable air adjustment tube 2. First, the air intake to the furnace body 12 is realized through multiple parts, so that the air intake is more uniform. Second, the cyclone wind is used to help dust particles separate and fall, thereby reducing the dust content in the flue gas. The air guide ring 31 and the air guide branch 32 directly supply air to the grate 16 through the air guide holes 33 at the upper end. The airflow in the cyclone chamber 4 can supply air to the grate 16 from the hollow area between the air guide ring 31 and the air guide branch 32, thereby avoiding excessive or insufficient local wind force.

[0044] The air guide ring 31 and the air guide branch 32 are arranged at the lower end of the grate 16. The powder slag in the grate 16 will fall into the air guide ring 31 and the air guide branch 32 through the air guide holes 33, causing dust accumulation in the air guide ring 31 and the air guide branch 32, which is easy to block the airflow.

[0045] In order to solve the above problems, in one implementation, Figure 2 , Figure 4 and Figure 5As shown, the air guide ring pipe 31 and the air guide branch pipe 32 are respectively provided with an air inlet duct 34 for guiding air into the inner cavity of the air guide ring pipe 31 and the air guide branch pipe 32, the air inlet duct 34 is externally connected to the air regulating cylinder 2, the air inlet duct 34 is arranged according to the shape distribution of the air guide ring pipe 31 and the air guide branch pipe 32, and the air inlet duct 34 is located in the air guide ring pipe 31 and the air guide branch pipe 32. Both sides are provided with air inlets to blow air into the inner cavity of the air guide ring pipe 31 and the air guide branch pipe 32, and the lower ends of the air guide ring pipe 31 and the air guide branch pipe 32 are respectively provided with ash dropping grooves 35 to help powder residue fall off; the air inlet duct 34 blows air into the inner cavity of the air guide ring pipe 31 and the air guide branch pipe 32, and then blows it toward the grate 16 from the air guide hole 33, and the powder residue enters the air guide ring pipe 31 and the air guide branch pipe 32 from the air guide hole 33, and is then discharged from the ash dropping groove 35.

[0046] In order to prevent powder residue from entering the air guide branch pipe 32 from the air inlet of the air guide branch pipe 32, the air inlet is arranged at the side end of the air guide branch pipe 32, which makes part of the wind be discharged upward from the air guide hole 33, and part of the wind be discharged downward from the ash falling groove 35, thereby dispersing the air volume. Therefore, in order to concentrate most of the wind to be discharged from the air guide hole 33; the air guide ring pipe 31 is provided with an inclined end surface 36 for adjusting the wind direction at the corresponding air inlet, and the inclined end surfaces 36 on both sides of the air guide ring pipe 31 gradually close toward each other downward to guide the wind upward; the air guide plate 37 for adjusting the wind direction is provided at the corresponding air inlet of the air guide branch pipe 32, and the air guide plate 37 is arranged on both sides of the air inlet duct 34, and the air guide plate 37 is an arc-shaped outwardly expanded structure to guide the wind upward, and gaps are respectively provided between the air guide plate 37 and the inner cavity wall of the air guide branch pipe 32 and the outer wall of the air inlet duct 34, so that powder residue can be discharged from the gap to avoid accumulation of powder residue. The two ends of the air guide plate 37 are fixed on the inner wall of the air guide branch pipe 32 .

[0047] like Figure 2 , Figure 3 As shown, a swirl air duct 42 is provided at the upper end of the cyclone chamber 4, and an air chamber inlet pipe 41 is arranged in a tangential direction on one side of the swirl air duct 42. The lower end of the cyclone chamber 4 is a conical structure, and an ash outlet 43 is provided at the bottom of the cyclone chamber 4 to communicate with the ash cleaning chamber 17 through the ash outlet 43. A conical guide body 44 is installed at the upper end of the ash outlet 43, and the guide body 44 is fixed on the inner wall of the ash outlet 43 through a guide rod. A gap is provided around the guide body 44 and the inner wall of the cyclone chamber 4 to guide the powder slag into the ash outlet 43. The cyclone chamber 4 generates swirls along the inner wall of the cyclone chamber 4 and the middle of the cyclone chamber 4 for the introduced wind, which helps the powder slag to fall into the ash cleaning chamber 17, and the rotating airflow helps to evenly introduce air into the grate 16.

[0048] like Figure 2 , Figure 3As shown, the cyclone tube 5 is arranged at the outer end of the furnace body 12 and is arranged in a ring along the outer wall of the furnace body 12. A plurality of cyclone openings 51 are arranged on the outer wall of the furnace body 12 in a ring-shaped distribution along the cyclone tube 5, so as to connect the inner cavity of the furnace body 12 and the inner cavity of the cyclone tube 5 through the cyclone openings 51. The cyclone openings 51 are arranged along the tangent of the inner cavity wall of the furnace body 12, so as to generate a vortex with the wind introduced into the inner cavity of the furnace body 12 by the cyclone tube 5, so as to supply oxygen to the furnace body 12, and to help the air flow in the inner cavity of the furnace body 12 to separate and fall, so as to ensure that there is sufficient oxygen in the furnace body 12 and reduce the dust content in the flue gas. A cyclone inlet pipe 52 is provided at the outer end of the cyclone tube 5, so as to be connected to the air regulating cylinder 2 through the cyclone inlet pipe 52.

[0049] The above technical solutions all provide uniform and sufficient oxygen to the fuel at the upper end of the grate 16 to ensure complete combustion of the fuel. However, the material guide channel 6 in the traditional furnace body 12 will accumulate the fuel on one side of the upper end of the grate 16, resulting in uneven fuel distribution, making the combustion process uncontrollable, and the accumulated fuel will also cause incomplete combustion of the fuel.

[0050] In order to solve the above problems, in one implementation, Figure 3 As shown, a screw feeder 18 is installed at the lower end of the hopper 14, and a material guide channel 6 connected to the screw feeder 18 is provided in the furnace body 12. The material guide channel 6 is tilted to deliver the fuel to the grate 16 through the material guide channel 6. The material guide channel 6 is located in the air supply chamber 11 and is equipped with a material guide air port 61. The outer end of the material guide channel 6 is provided with a material guide air duct 62 connected to the material guide air port 61. The material guide air duct 62 is externally connected to the air regulating cylinder 2 to blow the fuel into the furnace body 12 by wind, so that the fuel is evenly dispersed to the upper end of the grate 16. The screw feeder 18 delivers the fuel quantitatively to the material guide channel 6, and the fuel in the material guide channel 6 is evenly dispersed to the grate 16 by wind, so as to avoid the fuel from freely falling and accumulating on one side of the grate 16 after passing through the material guide channel 6, and solve the problem of insufficient fuel combustion caused by fuel accumulation.

[0051] The temperature adjustment of the hot air furnace needs to change the fuel supply and air intake. When the fuel input increases, the air intake needs to be increased accordingly to ensure that the fuel burns fully and the temperature adjustment can be achieved automatically. However, the existing hot air furnace does not have a mechanism for overall adjustment and distribution of air volume, resulting in the inability to coordinate the air intake and fuel input, which reduces the fuel combustion efficiency and affects the temperature adjustment effect.

[0052] In order to solve the above problems, in one implementation, Figures 6 to 9As shown, the air regulating cylinder 2 is provided with an air regulating mechanism for regulating the air distribution volume, and the air regulating mechanism includes an air regulating frame 7 inserted into the air regulating cylinder 2, and a control frame 8 arranged on the air supply chamber 11, and the air regulating frame 7 is provided with a rotating member and a valve control member for regulating the air volume, and the control frame 8 is provided with electric cylinders 81 for controlling the movement of the rotating member and the valve control member, so as to realize the automatic adjustment of the air volume by the rotating member and the valve control member. The control frame 8 is also used to fix the air regulating cylinder 2 so that the air regulating cylinder 2 is fixedly arranged vertically.

[0053] The air regulating frame 7 includes a frame rod 71 and end seats 72 installed on both sides of the frame rod 71. An air inlet tube 73 is also fixedly provided in the middle of the frame rod 71. The air inlet tube 73 and the air regulating tube 2 cooperate to form an air outlet to connect with the fan 15 through an external air duct. The rotating member is slidably installed on both sides of the air inlet tube 73. The valve control unit is respectively installed on the end seats 72 on both sides. The air regulating tube 2 is respectively provided with a second air regulating hole 27 and a third air regulating hole 28 corresponding to the rotating member. The end seat 72 is respectively provided with a first air regulating hole 26 and a fourth air regulating hole 29 corresponding to the valve control unit.

[0054] The rotating member includes an upper sliding sleeve 74 and a lower sliding sleeve 75, and a rotating plate 76 arranged on one side of the upper sliding sleeve 74 and the lower sliding sleeve 75. The outer ends of the upper sliding sleeve 74 and the lower sliding sleeve 75 are respectively provided with sliding rails, and the air inlet cylinder 73 and the end seat 72 are provided with sliding grooves corresponding to the sliding rails, so that the upper sliding sleeve 74 and the lower sliding sleeve 75 are slidably arranged;

[0055] A sealing plate 77 is provided at the outer end of the rotating plate 76 so that the sealing plate 77 is attached to the inner cavity wall of the air regulating cylinder 2. The sealing plates 77 on both sides of the air regulating frame 7 correspond to the second air regulating hole 27 and the third air regulating hole 28 respectively. A driving handle 78 is installed on the sealing plate 77. The air regulating cylinder 2 is provided with a corresponding adjusting groove 21 corresponding to the driving handle 78. The adjusting groove 21 is a waist-shaped structure so that the driving handle 78 passes through the adjusting groove 21. A first rotating seat 22 is provided at the outer end of the driving handle 78 to be connected to the corresponding electric cylinder 81 on the control frame 8 through the first rotating seat 22. The output rod of the electric cylinder 81 is rotatably connected to the first rotating seat 22, and the end of the electric cylinder 81 away from the first rotating seat 22 is rotatably installed on the control frame 8 to control the rotation of the sealing plate 77, thereby adjusting the opening size of the second air regulating hole 27 and the third air regulating hole 28 to adjust the air volume.

[0056] The valve control unit includes a valve plate 23 rotatably mounted on the inner wall of the end seat 72, the first air regulating hole 26 and the fourth air regulating hole 29 are respectively arranged in the middle of the end seat 72, one side of the valve plate 23 is rotatably mounted on the end seat 72 through a valve shaft 25, the outer end of the valve shaft 25 is provided with a second rotating seat 24, and is connected to the corresponding electric cylinder 81 on the control frame 8 through the second rotating seat 24, and the electric cylinder 81 is rotatably mounted on the control frame 8 at one end away from the second rotating seat 24 to control the rotation of the valve plate 23, thereby adjusting the opening size of the first air regulating hole 26 and the fourth air regulating hole 29 to adjust the air volume; a limit plate 20 is also provided on one side of the inner wall of the end seat 72 to limit the valve plate 23.

[0057] Limiting grooves 79 are respectively provided on both sides of the frame rod 71, and limiting protrusions are provided on the inner wall of the air regulating cylinder 2 corresponding to the limiting grooves 79. The limiting protrusions are inserted in the limiting grooves 79 to limit the rotation of the frame rod 71 in the air regulating cylinder 2; the sealing plate 77 is an arc-shaped structure, and the outer diameter of the sealing plate 77 is larger than the inner diameter of the frame rod 71, so that the frame rod 71 can be used to limit the sealing plate 77, and the frame rod 71 is provided with two groups distributed in an annular manner to limit the movement range of the sealing plate 77 to both sides.

[0058] The first air adjusting hole 26 is externally connected to an air supply hose, and is connected to the air chamber inlet pipe 41 through the air supply hose to let air into the cyclone chamber 4; the second air adjusting hole 27 is externally connected to an air supply hose, and is connected to the air inlet duct 34 through the air supply hose, so that the air inlet duct 34 is used to let air into the air guide ring pipe 31 and the air guide branch pipe 32; the third air adjusting hole 28 is externally connected to an air supply hose, and is connected to the cyclone inlet pipe 52 through the air supply hose to let air into the cyclone tube 5; the fourth air adjusting hole 29 is externally connected to an air supply hose, and is connected to the material guide air duct 62 through the air supply hose to blow the fuel to be evenly dispersed on the grate 16.

[0059] The beneficial effects of the present invention are as follows:

[0060] The present invention improves the structure of the existing hot blast furnace air inlet device. The improved hot blast furnace air inlet device supplies air to the furnace body 12 through the air guide pipe 3, the cyclone chamber 4, the cyclone tube 5 and the material guide channel 6. The air guide pipe 3 is arranged at the lower end of the grate 16. The air guide holes 33 distributed by the air guide ring pipe 31 and the air guide branch pipe 32 are used to directly supply air to the grate 16. The airflow in the cyclone chamber 4 can supply air to the grate 16 from the hollow area between the air guide ring pipe 31 and the air guide branch pipe 32, so that the oxygen required for fuel combustion on the grate 16 is sufficient. The cyclone chamber 4 allows the airflow at the lower end of the grate 16 to flow in a cyclone manner, and the cyclone tube 5 allows the airflow at the upper end of the grate 16 to flow in a cyclone manner, thereby improving the smoothness of the airflow and helping the dust in the flue gas to fall. The material guide channel 6 is blown by wind flow so that the fuel can be evenly dispersed on the grate 16, and the combustion efficiency of the fuel can be improved by cooperating with the evenly arranged air inlet structure. The air regulating mechanism is provided with individually controlled electric cylinders 81 for the air guide pipe 3, the cyclone chamber 4, the cyclone tube 5 and the material guide channel 6, and the air volume introduced into the air regulating cylinder 2 is reasonably planned by the air regulating mechanism to improve the dispersion and combustion effect of the fuel.

[0061] The above shows and describes the basic principle and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. It should be noted that, in this article, if there are relational terms such as first and second, it is only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An air inlet device for a hot blast furnace, comprising a housing (1), and an air supply chamber (11), a furnace body (12), and a heat exchange chamber (13) arranged in the housing (1), wherein a hopper (14) and a fan (15) are arranged in the air supply chamber (11), and characterized in that: The air outlet end of the fan (15) is externally connected to an air regulating cylinder (2) for regulating and distributing the air volume, the air regulating cylinder (2) is sequentially connected to an air guide pipe (3), a cyclone chamber (4) and a cyclone pipe (5) in the furnace body (12), the air guide pipe (3) is installed at the lower end of the grate (16) to evenly supply air to the grate (16), the cyclone chamber (4) is installed at the lower end of the air guide pipe (3), and a wind chamber inlet pipe (41) for introducing air into the cyclone chamber (4) is provided on one side of the cyclone chamber (4) along a tangential direction, so that a vortex is generated in the cyclone chamber (4); The air guide pipe member (3) comprises an annular air guide ring pipe (31) and air guide branch pipes (32) staggeredly arranged in the inner cavity of the air guide ring pipe (31); air guide holes (33) are distributed at the upper ends of the air guide ring pipe (31) and the air guide branch pipes (32); the grate (16) is mounted on the upper end of the air guide pipe member (3) and is spaced apart from the air guide holes (33); The air guide ring pipe (31) and the air guide branch pipe (32) are respectively provided with an air inlet duct (34) for guiding air into the inner cavities of the air guide ring pipe (31) and the air guide branch pipe (32); the air inlet duct (34) is externally connected to the air regulating tube (2); the air inlet duct (34) is arranged according to the shape distribution of the air guide ring pipe (31) and the air guide branch pipe (32); and the air inlet duct (34) is respectively provided with air inlets on both sides of the air guide ring pipe (31) and the air guide branch pipe (32) so as to blow air into the inner cavities of the air guide ring pipe (31) and the air guide branch pipe (32); and the lower ends of the air guide ring pipe (31) and the air guide branch pipe (32) are respectively provided with dust dropping grooves (35); An inclined end surface (36) for adjusting the wind direction is provided in the air guide ring tube (31) corresponding to the air inlet, and the inclined end surfaces (36) on both sides of the air guide ring tube (31) gradually close together downwardly to guide the wind upwards; an air guide plate (37) for adjusting the wind direction is provided in the air guide branch tube (32) corresponding to the air inlet, and the air guide plate (37) is arranged on both sides of the air inlet duct (34), and the air guide plate (37) is an arc-shaped outwardly expanded structure to guide the wind upwards, and gaps are respectively provided between the air guide plate (37) and the inner cavity wall of the air guide branch tube (32) and the outer wall of the air inlet duct (34), so that powder residue can be discharged from the gaps.

2. The hot blast stove air inlet device according to claim 1, characterized in that: The upper end of the cyclone chamber (4) is provided with a cyclone air duct (42); the air chamber inlet pipe (41) is arranged in a tangential direction of one side of the cyclone air duct (42); the lower end of the cyclone chamber (4) is a conical structure; and the bottom of the cyclone chamber (4) is provided with an ash drop opening (43) so as to communicate with the ash cleaning chamber (17) through the ash drop opening (43); a conical material guide body (44) is installed at the upper end of the ash drop opening (43); the material guide body (44) is fixed to the inner side wall of the ash drop opening (43) by a guide rod; and a gap is provided between the surrounding of the material guide body (44) and the inner wall of the cyclone chamber (4).

3. The hot blast stove air inlet device according to claim 1, characterized in that: The cyclone tube (5) is arranged at the outer end of the furnace body (12) and is arranged in an annular manner along the outer wall of the furnace body (12); a plurality of cyclone openings (51) are arranged in an annular manner along the cyclone tube (5) on the outer wall of the furnace body (12) so as to communicate the inner cavity of the furnace body (12) and the inner cavity of the cyclone tube (5) through the cyclone openings (51); the cyclone openings (51) are arranged along a tangent line of the inner cavity wall of the furnace body (12); a cyclone inlet pipe (52) is arranged at the outer end of the cyclone tube (5) so as to be connected to the air regulating cylinder (2) through the cyclone inlet pipe (52).

4. The air inlet device for a hot blast stove according to claim 1, characterized in that: A screw feeder (18) is installed at the lower end of the hopper (14), and a material guide channel (6) connected to the screw feeder (18) is provided in the furnace body (12). The material guide channel (6) is inclined so as to deliver fuel to the grate (16) through the material guide channel (6). The material guide channel (6) is located in the air supply chamber (11) and is provided with a material guide air port (61). The outer end of the material guide channel (6) is provided with a material guide air duct (62) connected to the material guide air port (61). The material guide air duct (62) is externally connected to an air regulating cylinder (2) so as to blow the fuel into the furnace body (12) by wind, so that the fuel is evenly dispersed to the upper end of the grate (16).

5. The air inlet device for a hot blast stove according to any one of claims 1 to 4, characterized in that: The air regulating cylinder (2) is provided with an air regulating mechanism for regulating the distributed air volume, the air regulating mechanism comprising an air regulating frame (7) inserted into the air regulating cylinder (2), and a control frame (8) arranged on the air supply chamber (11), the air regulating frame (7) is provided with a rotating member and a valve control member for regulating the air volume, and the control frame (8) is provided with electric cylinders (81) for controlling the movement of the rotating member and the valve control member; The air regulating frame (7) comprises a frame rod (71) and end seats (72) mounted on both sides of the frame rod (71); an air inlet tube (73) is fixedly mounted in the middle of the frame rod (71); the air inlet tube (73) and the air regulating tube (2) cooperate to form an air outlet so as to be connected with the fan (15) through an external air duct; the rotating member is slidably mounted on both sides of the air inlet tube (73); the valve control unit is respectively mounted on the end seats (72) on both sides; the air regulating tube (2) is respectively provided with a second air regulating hole (27) and a third air regulating hole (28) corresponding to the rotating member; and the end seat (72) is respectively provided with a first air regulating hole (26) and a fourth air regulating hole (29) corresponding to the valve control unit.

6. The hot blast stove air inlet device according to claim 5, characterized in that: The rotating member comprises an upper sliding sleeve (74) and a lower sliding sleeve (75), and a rotating plate (76) arranged on one side of the upper sliding sleeve (74) and the lower sliding sleeve (75); outer ends of the upper sliding sleeve (74) and the lower sliding sleeve (75) are respectively provided with sliding rails; and the air inlet cylinder (73) and the end seat (72) are provided with sliding grooves corresponding to the sliding rails so that the upper sliding sleeve (74) and the lower sliding sleeve (75) can be slidably arranged; A sealing plate (77) is provided at the outer end of the rotating plate (76) so that the sealing plate (77) is attached to the inner wall of the air regulating cylinder (2). The sealing plates (77) on both sides of the air regulating frame (7) correspond to the second air regulating hole (27) and the third air regulating hole (28), respectively. A driving handle (78) is installed on the sealing plate (77). The air regulating cylinder (2) is provided with a corresponding adjusting groove (21) corresponding to the driving handle (78). The adjusting groove (21) is a waist-shaped structure so that the driving handle (78) passes through the adjusting groove (2 1), a first rotating seat (22) is provided at the outer end of the driving handle (78), and is connected to a corresponding electric cylinder (81) on the control frame (8) through the first rotating seat (22); an output rod of the electric cylinder (81) is rotatably connected to the first rotating seat (22), and an end of the electric cylinder (81) away from the first rotating seat (22) is rotatably mounted on the control frame (8) to control the rotation of the sealing plate (77), thereby adjusting the opening size of the second air regulating hole (27) and the third air regulating hole (28) to adjust the air volume.

7. The air inlet device for a hot blast stove according to claim 5, characterized in that: The valve control unit comprises a valve plate (23) rotatably mounted on the inner wall of the end seat (72), the first air regulating hole (26) and the fourth air regulating hole (29) are respectively arranged in the middle of the end seat (72), one side of the valve plate (23) is rotatably mounted on the end seat (72) through a valve shaft (25), the outer end of the valve shaft (25) is provided with a second rotating seat (24), and is connected to a corresponding electric cylinder (81) on the control frame (8) through the second rotating seat (24), and one end of the electric cylinder (81) away from the second rotating seat (24) is rotatably mounted on the control frame (8) to control the rotation of the valve plate (23), thereby adjusting the opening size of the first air regulating hole (26) and the fourth air regulating hole (29) to adjust the air volume; a limit plate (20) is also provided on one side of the inner wall of the end seat (72) to limit the valve plate (23).

8. The hot blast stove air inlet device according to claim 6, characterized in that: Limiting grooves (79) are respectively provided on both sides of the frame rod (71); limiting convex bodies are provided on the inner wall of the air regulating cylinder (2) corresponding to the limiting grooves (79); the limiting convex bodies are inserted into the limiting grooves (79) to limit the rotation of the frame rod (71) in the air regulating cylinder (2); the sealing plate (77) is an arc-shaped structure; the outer diameter of the sealing plate (77) is larger than the inner diameter of the frame rod (71); the sealing plate (77) is limited by the frame rod (71); and two groups of the frame rod (71) are provided in an annular distribution to limit the movement range of the sealing plate (77) to both sides.

9. The air inlet device for a hot blast stove according to claim 8, characterized in that: The first air regulating hole (26) is externally connected to an air supply hose, and is connected to the air chamber inlet pipe (41) through the air supply hose, so as to let air into the cyclone chamber (4); the second air regulating hole (27) is externally connected to an air supply hose, and is connected to the air inlet duct (34) through the air supply hose, so as to let air into the air guide ring pipe (31) and the air guide branch pipe (32) through the air inlet duct (34); the third air regulating hole (28) is externally connected to an air supply hose, and is connected to the cyclone inlet pipe (52) through the air supply hose, so as to let air into the cyclone pipe (5); the fourth air regulating hole (29) is externally connected to an air supply hose, and is connected to the material guide air duct (62) through the air supply hose, so as to blow the fuel to be evenly dispersed on the grate (16).

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