Sintering machine head wheel heat preservation combustion injection device

Abstract

The present invention is a sintering machine head wheel heat preservation combustion injection device, comprising: multiple groups of injection structures, arranged in parallel along the direction of operation of the sintering machine, each group of injection structures is located above the sintering machine, each injection structure includes a injection pipe, and multiple injection holes are provided on the side wall of each injection pipe, and each of the injection pipes can be connected to the hydrogen-rich gas main; multiple groups of injection guide structures, arranged in parallel along the direction of operation of the sintering machine, each injection guide structure is used to guide the injection airflow, and the guide angle of each injection guide structure is adjustable; a sealing cover, which covers each group of injection structures and each injection guide structure from top to bottom. The present invention effectively solves the defects of the existing technology, effectively increases the sintering temperature, has a compact structure, a long service life, and is easy to implement, and effectively ensures the enhanced auxiliary sintering effect of the gas injection device in energy saving, emission reduction, and quality improvement.

Description

Technical Field

[0001] The invention relates to the technical field of sintering technology, in particular to a sintering machine head wheel heat preservation combustion injection device. Background Art

[0002] Ignition and insulation of the sintering mix are crucial steps in the sintering process. They are directly related to the yield and quality of the sintered ore. However, some domestic sintering plants currently lack adequate insulation and heating measures. Ignition times are typically short, and insulation measures are lacking. This results in insufficient heat reaching the upper layer of the mix, leaving some of the mix unsintered. This, in turn, is quickly cooled by ventilation. While some sintering plants have insulation measures in place, technical flaws result in uneven heat reaching the upper layer of the mix, resulting in poor quality of the sintered ore in the upper layer. These issues all lead to suboptimal sintering results, high ore return rates, and high solid fuel consumption.

[0003] Development trend of existing technology: Based on the existing technology and current usage, it is known that igniting and keeping the sintering material warm, raising the temperature of the furnace, improving the performance of the surface sintering material, and at the same time avoiding the rapid cooling rate and short crystallization rate of the surface sintered ore, which result in poor sintered ore strength, solve the problem of insufficient or uneven heat in the upper material layer of traditional sintering and excess heat in the lower material layer, improve the sintering quality of the upper sintering material layer, reduce the return rate, and achieve green, uniform heat, and low-carbon sintering.

[0004] Therefore, the inventors, relying on their many years of experience and practice in related industries, have proposed a sintering machine head wheel heat preservation combustion injection device to overcome the defects of the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a sintering machine head wheel insulation combustion blowing device, which effectively solves the defects of the existing technology, effectively increases the sintering temperature, has a compact structure, long service life, and is easy to implement, and effectively ensures the enhanced auxiliary sintering effect of the gas blowing device in energy saving, emission reduction, and quality improvement.

[0006] The object of the present invention is achieved by providing a sintering machine head wheel heat preservation combustion injection device, comprising:

[0007] Multiple groups of blowing structures are arranged in parallel along the running direction of the sintering machine, each group of the blowing structures is located above the sintering machine, each of the blowing structures includes a blowing pipe, and a plurality of blowing holes are provided on the side wall of each blowing pipe, and each of the blowing pipes can be connected to the hydrogen-rich gas main;

[0008] Multiple groups of blowing guide structures are arranged in parallel along the running direction of the sintering machine, each of the blowing guide structures is used to guide the blowing airflow, and the guiding angle of each blowing guide structure is adjustable;

[0009] The sealing cover is provided with various groups of blowing structures and various blowing guide structures from top to bottom.

[0010] In a preferred embodiment of the present invention, it further includes a plurality of mounting racks, and each group of the blowing structures is respectively mounted above the sintering machine through each mounting rack, and each mounting rack is arranged in parallel along the running direction of the sintering machine and can move along the running direction of the sintering machine.

[0011] In a preferred embodiment of the present invention, each of the blowing guide structures includes a swing shaft, which is connected to a guide plate via a support beam, and the guide plate is used to guide the blowing airflow; the swing shaft is hinged to the mounting frame; at least one end of the swing shaft is connected to a rotation adjustment structure, and the rotation adjustment structure drives the swing shaft to rotate to adjust the guide angle of the guide plate.

[0012] In a preferred embodiment of the present invention, the rotation adjustment structure includes a gear, a rack, a guide rail seat, an adjustment screw and an adjustment seat, and the guide rail seat and the adjustment seat are fixedly connected to the mounting frame; the gear is sleeved on the swing shaft, the rack is engaged with the gear, the rack can move along the guide rail seat, a threaded hole is provided on the adjustment seat, and the adjustment screw rotates through the threaded hole; the adjustment screw is driven to rotate, and the adjustment screw pushes the rack to slide back and forth along the guide rail seat in a horizontal plane.

[0013] In a preferred embodiment of the present invention, a U-shaped groove is provided on the guide rail seat, a slide is connected to the groove bottom and side walls of the U-shaped groove, and the rack can slide along the slide.

[0014] In a preferred embodiment of the present invention, one end of the swing shaft is connected to a pointer that can rotate therewith, and a scale indicating device is fixedly provided on the mounting frame at one end of the swing shaft.

[0015] In a preferred embodiment of the present invention, bearing seats are respectively provided on the mounting frame at both ends of the swing shaft, and the two ends of the swing shaft are respectively hinged in the bearing seats.

[0016] In a preferred embodiment of the present invention, cross beams are arranged at intervals on the mounting frame, brackets are fixedly connected to the cross beams, and the blowing pipe is connected to the top of the mounting frame through the bracket.

[0017] In a preferred embodiment of the present invention, wheels are provided at the bottom of each mounting frame, and tracks are provided below both sides of each mounting frame along the running direction of the sintering machine, and the wheels move along the tracks.

[0018] In a preferred embodiment of the present invention, a plurality of hydrogen-rich gas branch pipes are connected to the hydrogen-rich gas main pipe, and each of the hydrogen-rich gas branch pipes is sealed and penetrates the sealing cover and then connected to each of the injection pipes.

[0019] As described above, the heat-insulating combustion injection device for the sintering machine head wheel of the present invention has the following beneficial effects:

[0020] 1. Good auxiliary sintering effect:

[0021] The layout of the injection structure and injection guide structure in this sintering machine's headwheel heat-insulating combustion injection device allows a cooler hydrogen-air mixture to be drawn along the injection guide structure into the material bed area, passing through the mixed material layer within 2-3 seconds. During this time, the sinter cake is unlikely to cool. This distinguishes it from other tubular heaters and is one of the advantages of this combustion device. The use of the sintering machine's headwheel heat-insulating combustion injection device effectively directs the airflow field above the material surface, rapidly homogenizing it through extraction, effectively improving the quality of the edge and surface sinter, and enhancing the overall smelting effect.

[0022] The addition of an injection guide structure allows the angle of the guide plate to be adaptively adjusted according to operating conditions, ensuring effective guidance of the hydrogen-rich gas flow. This prevents spillage of the hydrogen-rich gas, shortens the gas movement time before mixing, and withstands certain ambient wind currents, ensuring that the hydrogen-rich gas is injected into the material bed and burned according to design requirements. Raising the installation height of the injection structure to the top of the mounting frame improves the uniformity of the air and gas mixing. In accordance with sintering production process requirements, the mounting frame, sealing cover, and injection structure can be moved forward and backward in the direction of the sintering machine trolley. This effectively solves the problems of insufficient and uneven heating in the upper material bed and excessive heating in the lower material bed during traditional sintering. This facilitates the auxiliary sintering process within the material bed and improves the quality of the sintered product.

[0023] The sintering machine's headwheel heat-insulating combustion injection device can use a variety of gas fuels, and the temperature can be adjusted over a wide range. Software dynamically simulates the airflow trajectory, combining parameters such as gas source pressure, volume, temperature, and flow rate. Based on the simulation results, the angles of guide plates located at different positions on the mounting frame are adjusted so that the hot air ejected from the injection holes is directed above the sintering material layer through multiple guide plates at different angles, completely covering it. The hydrogen-rich gas heating method provides consistent overall operation, a detachable, angle-adjustable device, a compact structure, and easy operation. The injection device, which can be adjusted according to changes in the sintering machine's operating conditions, can shorten discharge time, reduce energy consumption, improve production efficiency, and enhance the quality, stability, safety, and cost-effectiveness of production.

[0024] 2. Stable structure and long service life:

[0025] The support points are arranged at equal intervals in the middle of the blowing pipe of the present invention, so there is no problem of large span of pipeline support points, which is more likely to cause deflection and deformation and sagging of the middle part under the action of thermal radiation. It is not easy to deform during the production process and has a long service life.

[0026] 3. Reduce coal consumption:

[0027] The use of hydrogen-rich fuel gas in this invention reduces coal usage during pelletizing, lowering energy consumption. The carbon content in the mixed material drops from 4.2% to 3.6%, resulting in a total fuel saving of 7.5%. The FeO content in the sintered ore decreases from 12.7% to 11.52%, the 0-5 mm return ore decreases from 23.8% to 22.3%, and the drum index decreases from 23.7% to 20.7%. Without comprehensive heating, the difference in FeO content between the upper and lower layers of sintered ore is 1.45%. With comprehensive heating, the difference is 0.11%. Furthermore, due to the reduction of difficult-to-reducible glass, the porosity of the sintered ore increases, improving the sintered ore's reducibility in CO by an average of 1% and increasing blast furnace output by 0.5%. The sintering heat treatment process of this invention does not affect the productivity of the sintering machine. The improved strength of the sintered ore increases the annual output of sintered ore by an average of 3.0%.

[0028] In summary, this device effectively addresses the shortcomings of existing technologies, effectively raising sintering temperatures. Its compact structure, long lifespan, and ease of implementation ensure the enhanced auxiliary sintering effects of gas injection devices in terms of energy conservation, emission reduction, and quality improvement. Compared to existing technologies, it is more reliable and stable, improving the environmental and economic efficiency of sintering production, and is foreseeable to have significant market potential in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0030] Figure 1 : It is a side view of the sintering machine head wheel insulation combustion blowing device of the present invention.

[0031] Figure 2 : It is a top view of the sintering machine head wheel insulation combustion blowing device of the present invention.

[0032] Figure 3 : It is the front view of the sintering machine head wheel heat preservation combustion blowing device of the present invention.

[0033] Figure 4 : It is the front view of the injection guide structure of the present invention.

[0034] Figure 5 : It is a side view of the injection guide structure of the present invention.

[0035] Figure 6 : It is the front view of the rotation adjustment structure of the present invention.

[0036] Figure 7 : It is a side view of the rotation adjustment structure of the present invention.

[0037] In the picture:

[0038] 100. Sintering machine head wheel heat preservation combustion injection device;

[0039] 1. Injection structure; 11. Injection pipe; 12. Bracket;

[0040] 2. Injection guide structure; 21. Swing shaft; 22. Support beam; 23. Guide plate; 24. Pointer; 25. Scale indicating device; 26. Bearing seat;

[0041] 3. Sealing cover;

[0042] 4. Mounting frame; 41. Wheel; 42. Track; 43. Crossbeam;

[0043] 5. Rotation adjustment structure; 51. Gear; 52. Rack; 53. Guide rail seat; 54. Adjustment screw; 55. Adjustment seat; 56. Slide plate;

[0044] 6. Hydrogen-rich gas main pipe; 61. Hydrogen-rich gas branch pipe; 62. Regulating valve. DETAILED DESCRIPTION

[0045] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0046] The specific embodiments of the present invention described herein are intended only to illustrate the present invention and are not to be construed as limiting the present invention in any way. In light of the present invention, a skilled person may conceive of any possible variations based on the present invention, all of which should be considered to fall within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to mechanical or electrical connections, or to internal communication between two elements, and may be directly connected or indirectly connected through an intermediate medium. A person of ordinary skill in the art can understand the specific meanings of the above terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] like Figures 1 to 7 As shown, the present invention provides a sintering machine head wheel heat preservation combustion injection device 100, comprising:

[0049] Multiple groups of blowing structures 1 are arranged in parallel along the running direction of the sintering machine. Each group of blowing structures 1 is located above the sintering machine. Each blowing structure 1 includes a blowing pipe 11. A plurality of blowing holes are provided on the side wall of each blowing pipe 11. Each blowing pipe 11 can be connected to the hydrogen-rich gas main 6. The blowing pipes 11 are arranged in a straight line and spaced apart, forming one row.

[0050] Multiple groups of blowing guide structures 2 are arranged in parallel along the running direction of the sintering machine. Each blowing guide structure 2 is used to guide the blowing airflow, and the guiding angle of each blowing guide structure is adjustable.

[0051] The sealing cover 3 covers each group of blowing structures 1 and each blowing guide structure 2 from top to bottom.

[0052] Furthermore, the sintering machine head wheel insulation combustion injection device 100 also includes multiple mounting frames 4, and each group of injection structures 1 is respectively mounted above the sintering machine through each mounting frame 4. Each mounting frame 4 is arranged in parallel along the running direction of the sintering machine and can move along the running direction of the sintering machine.

[0053] Further, if Figure 1 、 Figure 4 、 Figure 5 As shown, each blowing guide structure 2 includes a swing shaft 21, which is connected to a guide plate 23 through a support beam 22, and the guide plate 23 is used to guide the blowing airflow; the swing shaft 21 is hinged on the mounting frame 4; at least one end of the swing shaft 21 is connected to a rotation adjustment structure 5, and the rotation adjustment structure 5 drives the swing shaft 21 to rotate to adjust the guide angle of the guide plate 23.

[0054] A plurality of guide plates 23 are arranged on the mounting frame. Before spraying, the position and angle of each guide plate 23 are adjusted according to the direction of air flow and distribution.

[0055] During the injection, the hydrogen-rich gas is immediately mixed with the air after being ejected from the injection hole. After being guided by the injection guide structure 2 and under the action of the exhaust fan (existing technology), the hydrogen-rich gas and air mixture is drawn into the material layer.

[0056] Further, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 As shown, the rotary adjustment structure 5 includes a gear 51, a rack 52, a guide rail seat 53, an adjustment screw 54, and an adjustment seat 55. The guide rail seat 53 and the adjustment seat 55 are both fixedly connected (welded) to the mounting frame 4. The gear 51 is mounted on the swing shaft 21 (with a key transmission between the two). The rack 52 is meshed with the gear 51 and can move along the guide rail seat 53. The adjustment seat 55 is provided with a threaded hole through which the adjustment screw 54 rotates. When the adjustment screw 54 is driven to rotate, it pushes the rack 52 to slide back and forth along the guide rail seat 53 in the horizontal plane. The meshing transmission between the gear 51 and the rack 52 drives the spray guide structure 2 to rotate and swing in the vertical plane, thereby adjusting the angle of the guide plate 23.

[0057] Further, if Figure 6 As shown, a U-shaped groove is provided on the guide rail seat 53, and a slide plate 56 is connected to the groove bottom and side wall of the U-shaped groove, and the rack 52 can slide along the slide plate 56. In this embodiment, the slide plate 56 is a self-lubricating wear-resistant slide plate.

[0058] Further, if Figure 4 、 Figure 5 As shown, one end of the swing shaft 21 is connected to a pointer 24 that rotates with it. A scale indicator 25, in the form of a dial, is fixed to one end of the swing shaft on the mounting frame 4. Pointer 24 can be constructed as a handle. When the swing shaft 21 is rotated, the guide plate 23, support beam 22, and pointer rotate synchronously with the swing shaft 21.

[0059] Further, if Figure 1 、 Figure 4 、 Figure 5 As shown, bearing seats 26 are respectively provided at both ends of the swing shaft on the mounting frame 4, and the two ends of the swing shaft are respectively hinged in the bearing seats 26. In a specific embodiment of the present invention, the bearing seats 26 are welded to the mounting frame 4.

[0060] Further, if Figure 3 As shown, crossbeams 43 are arranged at intervals on the mounting frame 4, and brackets 12 are fixedly connected to the crossbeams 43. The blowpipe 11 is connected to the top of the mounting frame 4 through the brackets 12. The brackets 12 of the blowpipe are arranged at equal intervals along the length direction of the blowpipe 11 to support the blowpipe 11. The brackets 12 are welded and fixed to the crossbeams 43 of the mounting frame.

[0061] Further, if Figure 1 As shown, wheels 41 are provided at the bottom of each mounting frame 4 , and tracks 42 are provided below both sides of each mounting frame 4 along the running direction of the sintering machine, and the wheels 41 move along the tracks 42 .

[0062] Further, if Figure 1、 Figure 2 、 Figure 3 As shown, the hydrogen-rich gas main pipe 6 is connected to a plurality of hydrogen-rich gas branch pipes 61, each hydrogen-rich gas branch pipe 61 is sealed and penetrates the sealing cover 3 and then connected to each injection pipe 11. The hydrogen-rich gas main pipe 6 is connected to a regulating valve 62.

[0063] The hydrogen-rich gas passes through the hydrogen-rich gas main pipe 6 and the hydrogen-rich gas branch pipe 61 , enters the blowing pipe 11 , and is ejected from the blowing hole of the blowing pipe 11 . When the ejected gas flow encounters the blowing guide structure 2 , it flows along the guide plate 23 toward the material layer.

[0064] The diameter and number of the blowing holes can be calculated based on the medium properties, temperature, pressure, flow rate and flow rate.

[0065] The injection guide structure 2 guides the airflow. During injection, the hydrogen-rich gas is immediately mixed with air after being ejected from the injection hole. The hydrogen-rich gas and air mixture is then drawn into the material layer by the guidance of the injection guide structure 2 and the action of the exhaust fan (existing technology).

[0066] When the present invention is used for hydrogen-rich gas injection-assisted sintering production, the flow angles at different positions can be determined based on the motion trajectory of the airflow field calculated by simulation and the dynamic operation trajectory of the hydrogen-rich gas flow injection. The angle of the injection guide structure 2 can be adjusted by rotating the adjustment structure 5, and then sintering ignition is performed, thereby achieving the hydrogen-rich gas being effectively guided to the upper layer of the material surface at different positions, thereby improving the auxiliary sintering effect.

[0067] Example 1:

[0068] The sintering machine head wheel heat-insulating combustion injection device consists of a sealing cover 3, n mounting frames 4, n sets of injection structures 1, n sets of rotational adjustment structures 5, n sets of injection guide structures 2, a hydrogen-rich gas main pipe 6, n hydrogen-rich gas branch pipes 61, and a regulating valve 62. Each mounting frame 4 houses one set of injection structures 1, multiple sets of rotational adjustment structures 5, and injection guide structures 2. The mounting frame 4 utilizes a single welded frame structure, with wheels 41 mounted on its bottom and rails 42 laid on both sides of the sintering machine trolley. The mounting frame 4 is adjustable along the sintering machine trolley's travel direction.

[0069] The connections between the various components are as follows: the sealing cover 3 is connected to and fixed to the mounting frame 4; the rotating adjustment structure 5 is connected to the mounting frame 4 and fixed to the top of the mounting frame 4; the injection guide structure 2 is connected to the rotating adjustment structure 5; one end of the hydrogen-rich gas branch pipe 61 is connected to the injection guide structure 2 and the other end is connected to the hydrogen-rich gas main pipe 6; all hydrogen-rich gas branch pipes 61 are connected to the same hydrogen-rich gas main pipe 6. The bracket 12 is connected to the injection pipe 11 at one end and to the mounting frame 4 at the other end.

[0070] The positional relationship between the various components is as follows: the sealing cover 3 is located on the outside of the mounting frame 4; the hydrogen-rich gas main pipe 6 and the regulating valve 62 are arranged on the outside of the mounting frame 4 and the sealing cover 3; the blowing structure 1, the rotation adjustment structure 5, the blowing guide structure 2, and the hydrogen-rich gas branch pipe 61 are all installed on the top of the mounting frame 4 and located inside the sealing cover 3; the hydrogen-rich gas main pipe 6 and the hydrogen-rich gas branch pipe 61 are softly connected, and the hydrogen-rich gas branch pipe 61 can be adjusted in position within a certain range; a group of blowing structures 1 is arranged at one end of each mounting frame, and multiple rotation adjustment structures 5 and blowing guide structures 2 are arranged at equal intervals in the remaining space; the rotation adjustment structure 5 is fixed on the beams at the top of both ends of the mounting frame 4, and the blowing guide structure 2 is located in the middle of the mounting frame 4, and its two ends are connected to the rotation adjustment structure 5; each blowing guide structure 2 can adjust the angle of the guide plate 23 through the rotation adjustment structure 5 at both ends; wheels 41 are installed at the bottom of the mounting frame 4, and the position along the moving direction of the sintering machine trolley is adjustable.

[0071] The side wall of the blow pipe 11 is provided with a row of blow holes arranged in a straight line. A set of blow structures 1 is installed on each mounting frame 4. The hydrogen-rich gas enters the blow pipe 11 through the hydrogen-rich gas main pipe 6 and the hydrogen-rich gas branch pipe 61, and is ejected from the blow holes of the blow pipe 11. When the ejected airflow encounters the blow guide structure 2, it will flow along the guide plate 23 toward the material layer. The diameter and number of the blow holes can be calculated based on the medium properties, temperature, pressure, flow rate, and flow rate. The blow guide structure 2 is arranged on the mounting frame. Before blowing, the position and angle of each guide plate will be adjusted according to the direction of the airflow flow and distribution. The brackets 12 of the blow pipe 11 are arranged at equal intervals along the length of the blow pipe 11 to support the blow pipe 11. The brackets 12 are welded and fixed to the crossbeam 43 of the mounting frame 4.

[0072] The working principle is to utilize a technical solution that supplements heating and insulation of the sintering mix. This sintering and heat treatment method essentially heats the mixture as it is drawn into the windbox. The temperature of the sintering bed is raised by supplemental heat supplied by the injection structure within the sintering mill's headwheel heat-insulating combustion injection device. The heat generated by the combustion of hydrogen-rich gas ejected from the injection structure is readily absorbed by the sintered ore, effectively absorbing the heat in the upper layers. The insulation serves to supply hot air to the coke in the mixture already burning in the igniter, aiding combustion in the lower layers and ensuring a pervasive sintering reaction. The supplied hot air temperature is between 600 and 1000°C, with sufficient oxygen content and an excess air coefficient of 3 to 6 for stable combustion. The essential operating principle is that after the mixture ignites, hydrogen-rich gas is supplied through its surface, providing supplemental heat to the upper layers, raising the mixture temperature and improving the quality of the sintered ore in the upper layers. In addition, due to the increase in external heat, the solid fuel in the mixture can also be reduced, thereby improving productivity.

[0073] As described above, the heat-insulating combustion injection device for the sintering machine head wheel of the present invention has the following beneficial effects:

[0074] 1. Good auxiliary sintering effect:

[0075] The layout of the injection structure and injection guide structure in this sintering machine's headwheel heat-insulating combustion injection device allows a cooler hydrogen-air mixture to be drawn along the injection guide structure into the material bed area, passing through the mixed material layer within 2-3 seconds. During this time, the sinter cake is unlikely to cool. This distinguishes it from other tubular heaters and is one of the advantages of this combustion device. The use of the sintering machine's headwheel heat-insulating combustion injection device effectively directs the airflow field above the material surface, rapidly homogenizing it through extraction, effectively improving the quality of the edge and surface sinter, and enhancing the overall smelting effect.

[0076] The addition of an injection guide structure allows the angle of the guide plate to be adaptively adjusted according to operating conditions, ensuring effective guidance of the hydrogen-rich gas flow. This prevents spillage of the hydrogen-rich gas, shortens the gas movement time before mixing, and withstands certain ambient wind currents, ensuring that the hydrogen-rich gas is injected into the material bed and burned according to design requirements. Raising the installation height of the injection structure to the top of the mounting frame improves the uniformity of the air and gas mixing. In accordance with sintering production process requirements, the mounting frame, sealing cover, and injection structure can be moved forward and backward in the direction of the sintering machine trolley. This effectively solves the problems of insufficient and uneven heating in the upper material bed and excessive heating in the lower material bed during traditional sintering. This facilitates the auxiliary sintering process within the material bed and improves the quality of the sintered product.

[0077] The sintering machine's headwheel heat-insulating combustion injection device can use a variety of gas fuels, and the temperature can be adjusted over a wide range. Software dynamically simulates the airflow trajectory, combining parameters such as gas source pressure, volume, temperature, and flow rate. Based on the simulation results, the angles of guide plates located at different positions on the mounting frame are adjusted so that the hot air ejected from the injection holes is directed above the sintering material layer through multiple guide plates at different angles, completely covering it. The hydrogen-rich gas heating method provides consistent overall operation, a detachable, angle-adjustable device, a compact structure, and easy operation. The injection device, which can be adjusted according to changes in the sintering machine's operating conditions, can shorten discharge time, reduce energy consumption, improve production efficiency, and enhance the quality, stability, safety, and cost-effectiveness of production.

[0078] 2. Stable structure and long service life:

[0079] The support points are arranged at equal intervals in the middle of the blowing pipe of the present invention, so there is no problem of large span of pipeline support points, which is more likely to cause deflection and deformation and sagging of the middle part under the action of thermal radiation. It is not easy to deform during the production process and has a long service life.

[0080] 3. Reduce coal consumption:

[0081] The use of hydrogen-rich fuel gas in this invention reduces coal usage during pelletizing, lowering energy consumption. The carbon content in the mixed material drops from 4.2% to 3.6%, resulting in a total fuel saving of 7.5%. The FeO content in the sintered ore decreases from 12.7% to 11.52%, the 0-5 mm return ore decreases from 23.8% to 22.3%, and the drum index decreases from 23.7% to 20.7%. Without comprehensive heating, the difference in FeO content between the upper and lower layers of sintered ore is 1.45%. With comprehensive heating, the difference is 0.11%. Furthermore, due to the reduction of difficult-to-reducible glass, the porosity of the sintered ore increases, improving the sintered ore's reducibility in CO by an average of 1% and increasing blast furnace output by 0.5%. The sintering heat treatment process of this invention does not affect the productivity of the sintering machine. The improved strength of the sintered ore increases the annual output of sintered ore by an average of 3.0%.

[0082] In summary, this device effectively addresses the shortcomings of existing technologies, effectively raising sintering temperatures. Its compact structure, long lifespan, and ease of implementation ensure the enhanced auxiliary sintering effects of gas injection devices in terms of energy conservation, emission reduction, and quality improvement. Compared to existing technologies, it is more reliable and stable, improving the environmental and economic efficiency of sintering production, and is foreseeable to have significant market potential in the future.

[0083] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A sintering machine head wheel heat preservation combustion injection device, characterized in that: include, Multiple groups of blowing structures are arranged in parallel along the running direction of the sintering machine, each group of the blowing structures is located above the sintering machine, each of the blowing structures includes a blowing pipe, and a plurality of blowing holes are provided on the side wall of each blowing pipe, and each of the blowing pipes can be connected to the hydrogen-rich gas main; Multiple groups of blowing guide structures are arranged in parallel along the running direction of the sintering machine, each of the blowing guide structures is used to guide the blowing airflow, and the guiding angle of each blowing guide structure is adjustable; The sealing cover is provided with each group of blowing structures and each blowing guide structure from top to bottom; It also includes a plurality of mounting racks, wherein each group of the blowing structures is respectively mounted above the sintering machine through each of the mounting racks, and each of the mounting racks is arranged in parallel along the running direction of the sintering machine and can move along the running direction of the sintering machine; A plurality of hydrogen-rich gas branch pipes are connected to the hydrogen-rich gas main pipe, and each of the hydrogen-rich gas branch pipes is sealed and penetrates the sealing cover and is connected to each of the injection pipes.

2. The sintering machine head wheel heat preservation combustion injection device according to claim 1, characterized in that: Each of the blowing guide structures includes a swing shaft, which is connected to a guide plate via a support beam, and the guide plate is used to guide the blowing airflow; the swing shaft is hinged on the mounting frame; at least one end of the swing shaft is connected to a rotation adjustment structure, and the rotation adjustment structure drives the swing shaft to rotate to adjust the guide angle of the guide plate.

3. The sintering machine head wheel heat preservation combustion injection device according to claim 2, characterized in that: The rotation adjustment structure includes a gear, a rack, a guide rail seat, an adjustment screw and an adjustment seat, and the guide rail seat and the adjustment seat are both fixedly connected to the mounting frame; the gear is sleeved on the swing shaft, the rack is engaged with the gear, the rack can move along the guide rail seat, a threaded hole is provided on the adjustment seat, and the adjustment screw rotates through the threaded hole; the adjustment screw is driven to rotate, and the adjustment screw pushes the rack to slide back and forth along the guide rail seat in a horizontal plane.

4. The sintering machine head wheel heat preservation combustion injection device according to claim 3, characterized in that: A U-shaped groove is provided on the guide rail seat, a slide plate is connected to the groove bottom and the side wall of the U-shaped groove, and the rack can slide along the slide plate.

5. The sintering machine head wheel heat preservation combustion injection device according to claim 2, characterized in that: One end of the swing shaft is connected to a pointer that can rotate with the swing shaft, and a scale indicating device is fixedly arranged on the mounting frame at one end of the swing shaft.

6. The sintering machine head wheel heat preservation combustion injection device according to claim 2, characterized in that: Bearing seats are respectively arranged on the mounting frame at both ends of the swing shaft, and the two ends of the swing shaft are respectively hinged in the bearing seats.

7. The sintering machine head wheel heat preservation combustion injection device according to claim 1, characterized in that: Crossbeams are arranged at intervals on the mounting frame, brackets are fixed on the crossbeams, and the blowing pipe is connected above the mounting frame through the bracket.

8. The sintering machine head wheel heat preservation combustion injection device according to claim 1, characterized in that: Wheels are arranged at the bottom of each mounting frame, and tracks are arranged below both sides of each mounting frame along the running direction of the sintering machine, and the wheels move along the tracks.

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