Sintering machine combined plate-type blowing device

Abstract

The present invention is a combined plate-path blowing device for a sintering machine, comprising multiple groups of blowing structures, each group of blowing structures being located above the sintering machine, and the blowing airflows of each group of blowing structures being isolated from each other; each blowing structure comprising multiple blowing plates, hydrogen-rich gas blowing pipes, combustion air pipes, and combustion air branches; each blowing plate having a central cavity, and the bottom of each blowing plate having multiple blowing holes arranged in a matrix; a sealing cover being buckled downward from the top of each blowing plate; the combustion air pipes being connected to the combustion air branches, and the combustion air pipes being passed through the blowing plates; when blowing, the hydrogen-rich gas and combustion air form a mesh-like blowing airflow above the sintering machine. The present invention changes the existing pipe-path blowing form to a combined plate-path blowing form, thereby improving the uniformity, mixing uniformity, and combustion uniformity of the two gas media and eliminating blind spots in the blowing process; and the present invention has a simple structure, high strength, long service life, and is easy to implement.

Description

Technical Field

[0001] The invention relates to the technical field of sintering technology, in particular to a combined plate-path type blowing device for a sintering machine. 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 sintering plants currently lack adequate insulation and heating measures. Typically, ignition times are 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 sintered ore. 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] The gas ejection point of the existing sintering machine's injection device is located too low, causing the ejected gas to quickly come into contact with the sintering material and not have enough time to mix evenly with the air in the hood; the pipeline is slender, the support point span is large, and coupled with the effect of heat radiation, it is easy for the pipeline to sag in the middle after long-term production due to insufficient deflection.

[0005] Therefore, the inventors, relying on their many years of experience and practice in related industries, have proposed a combined plate-type blowing device for a sintering machine to overcome the defects of the prior art. Summary of the Invention

[0006] The purpose of the present invention is to provide a combined plate-type blowing device for a sintering machine to solve the defects of the prior art: reasonably control the amount of hydrogen-rich fuel gas and combustion-supporting air in each section of the blowing, thereby realizing precise step-by-step gas distribution for the blowing; improving the sufficiency of oxygen in each section, improving the uniformity, mixing uniformity, and combustion uniformity of the two gas media blowing, and eliminating the blind spots of the blowing; the present invention has a simple structure, high strength, long service life, and is easy to implement; it can reduce the use of coal, ensure the beneficial effects of blowing-assisted sintering in energy saving, emission reduction, and quality improvement, thereby improving the strength and output of the sintered ore.

[0007] The object of the present invention is achieved by providing a combined plate-type blowing device for a sintering machine, comprising a plurality of blowing structures arranged in parallel along the running direction of the sintering machine, wherein each group of the blowing structures is located above the sintering machine, and the blowing airflows of each group of the blowing structures are isolated from each other;

[0008] Each of the injection structures includes a plurality of injection plates, a hydrogen-rich gas injection pipe, a combustion-supporting air pipe, and a combustion-supporting air branch pipe. A central cavity is provided in each of the injection plates. A plurality of injection holes arranged in a matrix are provided at the bottom of each of the injection plates. The hydrogen-rich gas injection pipe and each of the injection holes are connected to the central cavity. The length of the central cavity is greater than or equal to the transverse width of the sintering machine. A sealing cover is buckled downward from the top of each of the injection plates.

[0009] The combustion air exhaust pipes are arranged in a matrix, the tops of the combustion air exhaust pipes are connected to the combustion air branch pipes, the combustion air exhaust pipes pass through the injection plate body from top to bottom through the sealing cover, and the bottom outlets of the combustion air exhaust pipes are at the same height as the bottoms of the injection holes. During injection, the hydrogen-rich gas and the combustion air form a mesh-like injection airflow above the sintering machine.

[0010] Each of the hydrogen-rich gas injection pipes is connected to the hydrogen-rich gas injection main pipe via a hydrogen-rich gas injection branch pipe, and the combustion-supporting air branch pipe is connected to the combustion-supporting air main pipe.

[0011] 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.

[0012] In a preferred embodiment of the present invention, a gas regulating valve is provided on each of the hydrogen-rich fuel gas injection branch pipes.

[0013] In a preferred embodiment of the present invention, a combustion air regulating valve is provided on the combustion air main pipe.

[0014] In a preferred embodiment of the present invention, partitions are respectively provided at both ends of each mounting frame along the running direction of the sintering machine, and the partitions are used to isolate the blowing airflows of two adjacent groups of the blowing structures.

[0015] In a preferred embodiment of the present invention, wheels are provided at the bottom of each mounting frame.

[0016] In a preferred embodiment of the present invention, rails are provided below both sides of each mounting frame along the running direction of the sintering machine, and the wheels move along the rails.

[0017] In a preferred embodiment of the present invention, the hydrogen-rich gas injection exhaust pipe and the hydrogen-rich gas injection branch pipe are arranged in a flexible connection.

[0018] In a preferred embodiment of the present invention, the combustion-supporting air branch pipe and the combustion-supporting air main pipe are arranged in a flexible connection.

[0019] In a preferred embodiment of the present invention, a plurality of first mounting holes extending vertically therethrough are provided on the blowing plate body, and the combustion-supporting air exhaust pipe is sealed and passes through each of the first mounting holes.

[0020] As described above, the combined plate-type blowing device for a sintering machine of the present invention has the following beneficial effects:

[0021] 1. Better oxygen sufficiency, injection and mixing uniformity - can improve the uniformity of injection and enhance the mixing uniformity of the two gases:

[0022] The hydrogen-rich gas enters the central cavity of the injection plate through the hydrogen-rich gas injection main pipe, the hydrogen-rich gas injection branch pipe, and the hydrogen-rich gas injection exhaust pipe. The hydrogen-rich gas in the central cavity is sprayed downward through the injection holes, forming a plate-type injection; the combustion-supporting air passes through the combustion-supporting air main pipe and the combustion-supporting air branch pipe and is sprayed downward through the combustion-supporting air exhaust pipe, forming a pipeline injection; the injection structure forms a combined plate-type injection structure;

[0023] The present invention changes the pipe-row injection form of the prior art to a combined plate-type injection form, wherein multiple groups of injection devices are arranged adjacently and parallel to each other along the running direction of the sintering machine, and the injection holes of the hydrogen-rich gas and the combustion-supporting air injection pipes are arranged in a square matrix. During injection, the injection airflow is distributed in a mesh shape above the material layer, and the length of the central cavity is greater than or equal to the transverse width of the sintering machine, so that the injection airflow of the hydrogen-rich gas and the combustion-supporting air can fully cover the material layer of the sintering machine, with a wide coverage range, effectively making up for the injection blind area defect of the prior art. At the same time, it can provide sufficient oxygen for the material layer, ensuring slow and uniform cooling and uniform sintering.

[0024] The two gases are sprayed out in a mesh shape from the same direction, which can improve the uniformity of the spraying and achieve the best uniform effect when the gas is sprayed on the material surface; the bottom outlet of the combustion air exhaust pipe is basically at the same height as the bottom of the spray hole, and the spraying point is at a certain distance from the material layer, so that the gas and combustion air are sprayed out in a mesh shape from the same height, so that they flow downward basically synchronously, and the path and time they travel before entering the sintering material layer are basically the same, so that the two gases are evenly mixed. In this way, the volume concentration of the gas finally entering the material layer is also basically the same, thereby enhancing the uniformity of the mixing of the two gases and improving the uniformity of the volume and concentration of the gas entering the material layer;

[0025] The above technical features effectively solve the problems of insufficient and uneven heat in the upper material layer and excess heat in the lower material layer in traditional sintering, which is beneficial to the auxiliary sintering process in the material layer and improves the quality of sintered products.

[0026] 2. Accurate step-by-step gas distribution - Reasonably control the gas injection volume and injection gas concentration in different areas of the sealed cover:

[0027] During production, different volumes and different trolley positions of sintering materials require different amounts of gas and air for auxiliary sintering. The amount and concentration of the injected gas at different lengths in the sealed cover also need to be different. The ideal values ​​of the amount of gas and air to be injected per hour can be calculated based on the material layer thickness and trolley speed, thereby determining the injection volume of each group of injection devices.

[0028] In the present invention, multiple groups of blowing structures are arranged in parallel along the running direction of the sintering machine, and the blowing airflows of each group of blowing structures are isolated from each other to form independent spaces, that is, the blowing hood is divided into several independent cavities, thereby avoiding the free diffusion of gas in the sealed hood and the uncontrollable gas concentration at different length positions. The fuel gas and air for auxiliary sintering in the blowing hood are prevented from flowing toward the tail of the blowing hood under the drive of the sintering material, thereby suppressing the enrichment of fuel gas and air at the tail of the blowing hood, reducing the risk of fire at the tail of the blowing hood, and achieving the purpose of accurately controlling the gas concentration at various locations in the sealed hood.

[0029] Each injection structure is connected to the gas main through a different gas branch pipe. The injection volume of each group of injection structures can be controlled separately. In this way, the injection volume of each group of injection structures can be flexibly adjusted to match the theoretically calculated value in combination with the sintering production conditions. The injection volume of hydrogen-rich gas and air in different areas along the running direction of the sintering machine in the sealing cover can be reasonably controlled, thereby enhancing the stability of the device and improving the accuracy and economy of the injection.

[0030] 3. Stable structure, translation possible, long service life:

[0031] The present invention changes the existing pipe row injection structure, so there are no problems such as large span of pipeline support points, more prone to deflection and deformation under the action of thermal radiation, and sagging in the middle. The gas is sprayed through the injection plate body, and the combustion-supporting air is sprayed through the row pipe. The plate-type combined structure formed is stable and has high strength. It is not easy to deform during the production process and has a long service life.

[0032] 4. Reduce coal consumption:

[0033] In the present invention, the use of hydrogen-rich fuel gas can reduce the amount of coal used in sintering materials to make pellets, reduce energy consumption, and reduce production costs.

[0034] In summary, the combined plate-type injection device for a sintering machine of the present invention can effectively solve the defects of the prior art: reasonably control the amount of hydrogen-rich fuel gas and combustion-supporting air in each injection section, and realize precise step-by-step gas distribution for injection; improve the sufficiency of oxygen in each section, improve the uniformity, mixing uniformity, and combustion uniformity of the two gas media injection, and eliminate injection blind spots; the present invention has a simple structure, high strength, long service life, and is easy to implement; it can reduce the amount of coal used, ensure the beneficial effects of injection-assisted sintering in energy saving, emission reduction, and quality improvement, thereby improving the strength and output of sintered ore. Therefore, compared with the prior art, the present invention has a simple structure and strong practicality, can improve the quality and stability of sintered products, and improve the environmental protection and economy of sintering production. It can be foreseen that it has huge development potential in the future market. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 : It is a top view of the sintering machine combined plate type blowing device of the present invention.

[0037] Figure 2 : It is the front view of the sintering machine combined plate type blowing device of the present invention.

[0038] Figure 3 : It is a side view of the sintering machine combined plate type blowing device of the present invention.

[0039] Figure 4 : It is a top view of the blowing structure of the present invention.

[0040] In the picture:

[0041] 100. Combined plate-type blowing device for sintering machine;

[0042] 1. Injection structure; 11. Injection plate; 110. Central cavity; 111. Injection hole; 12. Hydrogen-rich gas injection pipe; 13. Combustion air pipe; 14. Combustion air branch pipe;

[0043] 2. Hydrogen-rich gas injection branch pipe; 21. Gas regulating valve;

[0044] 3. Hydrogen-rich gas injection main pipe;

[0045] 4. Combustion air main pipe; 41. Combustion air regulating valve;

[0046] 5. Mounting frame; 51. Partition; 52. Wheel; 53. Track;

[0047] 6. Sealing cover;

[0048] 7. Sintering machine. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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 intended only to describe specific embodiments 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.

[0052] Figures 1 to 4 As shown, the present invention provides a sintering machine combined plate-type blowing device 100, comprising a plurality of blowing structures 1 arranged in parallel along the running direction of the sintering machine, each blowing structure 1 being located above the sintering machine 7, and the blowing airflows of each blowing structure 1 being isolated from each other;

[0053] Each injection structure includes a plurality of injection plates 11, a hydrogen-rich gas injection pipe 12, a combustion-supporting air pipe 13, and a combustion-supporting air branch pipe 14. A central cavity 110 is provided in each injection plate 11. In this embodiment, the injection plate 11 can be composed of a rectangular integral frame structure covering a flat plate. A plurality of injection holes 111 arranged in a matrix are provided at the bottom of each injection plate 11. The hydrogen-rich gas injection pipe 12 and each injection hole 111 are connected to the central cavity 110. The length of the central cavity 110 is greater than or equal to the transverse width of the sintering machine 7 (the length is determined according to actual needs and cannot be too large).

[0054] A sealing cover 6 is buckled downward from the top of each blowing plate 11 to prevent the blowing air flow from freely diffusing outwards;

[0055] The combustion air exhaust pipes 13 are arranged in a matrix, and the combustion air exhaust pipes 13 pass through the injection plate body 11 from top to bottom. The bottom outlet of the combustion air exhaust pipe 13 is substantially at the same height as the bottom of the injection hole 111.

[0056] Each hydrogen-rich gas injection exhaust pipe 12 is connected to the hydrogen-rich gas injection main pipe 3 through a hydrogen-rich gas injection branch pipe 2 , and the combustion-supporting air branch pipe 14 is connected to the combustion-supporting air main pipe 4 .

[0057] Further, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the sintering machine combined plate-type blowing device 100 also includes a plurality of mounting frames 5, and the sealing cover 6 is fixedly connected to the mounting frame 5; each group of blowing structures 1 is respectively mounted above the sintering machine 7 through each mounting frame 5, and each mounting frame 5 is arranged in parallel along the running direction of the sintering machine and can move along the running direction of the sintering machine.

[0058] According to the requirements of the sintering production process, the mounting frame, the sealing cover and the blowing structure can be moved forward and backward in the running direction of the sintering machine trolley.

[0059] Further, if Figure 1 As shown, each hydrogen-rich gas injection branch pipe 2 is provided with a gas regulating valve 21 , which is used to cut off / connect the hydrogen gas source and adjust the flow of the hydrogen-rich gas to achieve precise control of the injection amount.

[0060] Further, if Figure 1 As shown, a combustion air regulating valve 41 is provided on the combustion air main pipe 4. The combustion air regulating valve 41 is used to cut off / connect the air source and adjust the flow rate of the combustion air to achieve precise control of the injection amount.

[0061] Further, if Figure 2 、 Figure 3 As shown, each mounting frame 5 is provided with partitions 51 at both ends along the running direction of the sintering machine. The partitions 51 are used to separate the blowing airflows of two adjacent groups of blowing structures 1. The partitions 51 isolate the blowing airflows of each group of blowing structures 1 from each other, forming independent spaces.

[0062] Furthermore, wheels 52 are provided at the bottom of the mounting frame 5 .

[0063] Further, if Figure 2 、 Figure 3 As shown, rails 53 are provided below both sides of each mounting frame 5 along the running direction of the sintering machine, and the wheels 52 move along the rails 53 .

[0064] The movable mounting frame 5 is a welded frame structure, with wheels 52 installed at the bottom. The wheels 52 can move forward and backward along the running direction of the sintering machine trolley on the track 53, and the position can be adjusted according to the production process requirements.

[0065] Furthermore, the hydrogen-rich gas injection pipe 12 and the hydrogen-rich gas injection branch pipe 2 are softly connected (connected by a hose), and the position of the hydrogen-rich gas injection pipe 12 can be adjusted within a certain range.

[0066] Furthermore, the combustion-supporting air branch pipe 14 is softly connected to the combustion-supporting air main pipe 4 (connected by a hose), and the position of the combustion-supporting air branch pipe 14 can be adjusted within a certain range.

[0067] Furthermore, a plurality of first mounting holes extending vertically through the blowing plate 11 are provided, and the combustion air exhaust pipes are sealed and pass through each of the first mounting holes.

[0068] Example 1

[0069] The sintering machine combined plate-type blowing device 100 includes a sealing cover 6, n mounting frames 5, n groups of blowing structures 1, n combustion-supporting air main pipes 4, n hydrogen-rich gas blowing branch pipes 2, and a hydrogen-rich gas blowing main pipe 3. A group of blowing structures 1 is installed on a mounting frame 5, and each group of blowing structures 1 includes four parallel blowing plate bodies 11. Wheels 52 are provided at the bottom of each mounting frame 5, and tracks 53 are laid on both sides of the sintering machine (existing technology). The mounting frame 5 can move forward and backward along the running direction of the sintering machine; the sealing cover 6 is fixed on the mounting frame 5 (buckled on its outside); the sintering machine is located inside the sealing cover 6 and the mounting frame 5.

[0070] The specifications and quantity of the pipelines for the hydrogen-rich gas and the combustion-supporting air, as well as the diameter and quantity of the injection holes 111 at the bottom of the injection plate 11 are determined by calculation based on the properties, temperature, pressure, flow rate and flow of the medium.

[0071] N groups of injection structures 1 are arranged on top of each mounting frame 5, wherein in each group of injection structures 1, the hydrogen-rich gas injection pipes 12 on each injection plate 11 are connected to the same hydrogen-rich gas injection branch pipe 2, and each hydrogen-rich gas injection branch pipe 2 is connected to the same hydrogen-rich gas injection main pipe 3;

[0072] In each group of injection structures 1, the same row of combustion air exhaust pipes 13 on each injection plate body 11 are connected to the same combustion air branch pipe 14, and each combustion air branch pipe 14 is connected to the same combustion air main pipe 4;

[0073] One end of the hydrogen-rich gas injection exhaust pipe 12 is connected to the injection plate 11 (connected from its side), and the other end is connected to the hydrogen-rich gas injection branch pipe 2. The hydrogen-rich gas injection branch pipe 2 and the hydrogen-rich gas injection exhaust pipe 12 are connected by a hose;

[0074] One end of the combustion air exhaust pipe 13 is connected to the combustion air branch pipe 14, and the other end passes through and is connected to the blowing plate body 11. The combustion air branch pipe 14 and the combustion air main pipe 4 are connected by a hose;

[0075] The combustion-supporting air exhaust pipe 13 penetrates the blowing plate body 11 from top to bottom, and the combustion-supporting air exhaust pipe 13 and the blowing plate body 11 are welded and fixed.

[0076] In each injection structure 1, the injection plate 11 is a rectangular welded frame encasing a flat plate. The plate 11 has a central cavity, with side openings connected to a hydrogen-rich gas injection pipe 12 (which inserts from the side of the plate 11 into the central cavity 110 of the plate 11). The bottom of the plate 11 is provided with injection holes 111 arranged in a square matrix. The arrangement of the injection holes 111 should cover the material layer within the sealing cover. The first mounting holes are staggered at intervals between the injection holes 111, and the combustion air pipe 13 seals through each of these first mounting holes.

[0077] The hydrogen-rich gas enters the central cavity 110 of the injection plate 11 through the hydrogen-rich gas injection main pipe 3, the hydrogen-rich gas injection branch pipe 2, and the hydrogen-rich gas injection exhaust pipe 12. The hydrogen-rich gas in the central cavity 110 is sprayed downward to the surface of the sintering material layer through the injection hole 111, forming plate-type injection; the combustion-supporting air passes through the combustion-supporting air main pipe 4 and the combustion-supporting air branch pipe 14, and is sprayed downward to the surface of the sintering material layer through the combustion-supporting air exhaust pipe 13, forming pipeline injection; the injection structure 1 forms a combined plate-type injection structure; the injection hole 111 and the outlet of the combustion-supporting air exhaust pipe are basically consistent in height.

[0078] The positional relationship between the various components is as follows: n mounting frames 5 are arranged side by side along the running direction of the sintering machine, the tracks 53 at the bottom of the mounting frames are laid on both sides of the sintering machine (trolley), the sealing cover 6 is fixed to the outside of the mounting frames 5, a set of blowing structures 1 is installed on the top of each mounting frame 5, and the sintering machine (trolley) is located inside the sealing cover 6 and the mounting frames 5;

[0079] The hydrogen-rich gas injection main pipe 3, the hydrogen-rich gas injection branch pipe 2, the combustion air main pipe 4, the combustion air regulating valve 41, and the gas regulating valve 21 are all located outside the sealing cover 6;

[0080] The injection plate 11 is located inside the sealing cover 6 and fixed to the top of the mounting frame 5. The hydrogen-rich fuel gas injection pipe 12, combustion air branch pipe 14, and combustion air exhaust pipe 13 of the injection structure 1 are all located above the sintering machine (trolley), fixed to the top of the mounting frame 5, and located within the sealing cover 6. The combustion air exhaust pipe 13 runs through the injection plate 11 from top to bottom. The mounting frame 5, sealing cover 6, and injection structure 1 can move forward and backward in the direction of operation of the sintering machine (trolley), effectively adapting to production process requirements.

[0081] The beneficial effects of the technical solution provided by the present invention are embodied in the following aspects:

[0082] 1. Better oxygen sufficiency, injection and mixing uniformity - can improve the uniformity of injection and enhance the mixing uniformity of the two gases:

[0083] The hydrogen-rich gas enters the central cavity 110 of the injection plate 11 through the hydrogen-rich gas injection main pipe 3, the hydrogen-rich gas injection branch pipe 2, and the hydrogen-rich gas injection exhaust pipe 12. The hydrogen-rich gas in the central cavity 110 is sprayed downward through the injection hole 111, forming a plate-type injection; the combustion air passes through the combustion air main pipe 4 and the combustion air branch pipe 14 and is sprayed downward through the combustion air exhaust pipe 13, forming a pipeline injection; the injection structure 1 forms a combined plate-type injection structure;

[0084] The present invention changes the pipe-row injection form of the prior art to a combined plate-type injection form, wherein multiple groups of injection devices are arranged adjacently and parallel to each other along the running direction of the sintering machine. The injection holes of the hydrogen-rich gas and the combustion air injection pipes are arranged in a square matrix. During injection, the injection airflow is distributed in a mesh shape above the material layer. The length of the central cavity 110 is greater than or equal to the transverse width of the sintering machine 7, so that the injection airflow of the hydrogen-rich gas and the combustion air can fully cover the material layer above the sintering machine, with a wide coverage range, effectively making up for the injection blind area defect of the prior art. At the same time, it can provide sufficient oxygen for the material layer, ensuring slow and uniform cooling and uniform sintering.

[0085] The two gases are ejected in a mesh shape from the same direction, which can improve the uniformity of the injection and achieve the best uniform effect when the gas is injected into the material surface; the bottom outlet of the combustion air exhaust pipe 13 is substantially at the same height as the bottom of the injection hole 111, and the injection point is at a certain distance from the material layer, so that the gas and combustion air are ejected in a mesh shape from the same height, so that they flow downward substantially synchronously, and the paths and time they travel before entering the sintering material layer are substantially the same, so that the two gases are evenly mixed, so that the volume concentration of the gas finally entering the material layer is also substantially the same, thereby enhancing the uniformity of the mixing of the two gases and improving the uniformity of the volume and concentration of the gas entering the material layer;

[0086] The above technical features effectively solve the problems of insufficient and uneven heat in the upper material layer and excess heat in the lower material layer in traditional sintering, which is beneficial to the auxiliary sintering process in the material layer and improves the quality of sintered products.

[0087] 2. Accurate step-by-step gas distribution - rationally control the gas injection volume and gas concentration in different areas of the sealed cover (along the running direction of the sintering machine):

[0088] During production, different volumes and different trolley positions of sintering materials require different amounts of gas and air for auxiliary sintering. The amount and concentration of the injected gas at different lengths in the sealed cover also need to be different. The ideal values ​​of the amount of gas and air to be injected per hour can be calculated based on the material layer thickness and trolley speed, thereby determining the injection volume of each group of injection devices.

[0089] In the present invention, multiple groups of blowing structures 1 are arranged in parallel along the running direction of the sintering machine, and the blowing airflows of each group of blowing structures 1 are isolated from each other to form independent spaces, that is, the blowing hood is divided into several independent cavities, thereby avoiding the free diffusion of gas in the sealed hood and the uncontrollable gas concentration at different length positions. It also prevents the fuel gas and air for auxiliary sintering in the blowing hood from flowing toward the tail of the blowing hood under the drive of the sintering material, thereby suppressing the enrichment of fuel gas and air at the tail of the blowing hood, reducing the risk of fire at the tail of the blowing hood, and achieving the purpose of accurately controlling the gas concentration at various locations in the sealed hood.

[0090] Each injection structure 1 is connected to the gas main pipes (combustion air main pipe 4, hydrogen-rich gas injection main pipe 3) through different gas branches (combustion air branch pipe 14, hydrogen-rich gas injection branch pipe 2). The injection volume of each group of injection structures 1 can be controlled separately. In this way, in combination with the requirements of sintering production conditions, the injection volume of each group of injection structures 1 can be flexibly adjusted to match the theoretically calculated value, and the injection volume of hydrogen-rich gas and air in different areas along the operating direction of the sintering machine in the sealed cover can be reasonably controlled, thereby enhancing the stability of the device and improving the accuracy and economy of the injection.

[0091] 3. Stable structure, translation possible, long service life:

[0092] The present invention changes the existing pipe row injection structure, so there are no problems such as large span of pipeline support points, more prone to deflection and deformation under the action of thermal radiation, and sagging in the middle. The gas is sprayed through the injection plate body, and the combustion-supporting air is sprayed through the row pipe. The plate-type combined structure formed is stable and has high strength. It is not easy to deform during the production process and has a long service life.

[0093] 4. Reduce coal consumption:

[0094] In the present invention, the use of hydrogen-rich fuel gas can reduce the amount of coal used in sintering materials to make pellets, reduce energy consumption, and reduce production costs.

[0095] In summary, the combined plate-type injection device 100 for a sintering machine of the present invention can effectively solve the defects of the prior art: it rationally controls the amount of hydrogen-rich fuel gas and combustion-supporting air in each injection section, achieving precise step-by-step gas distribution for injection; it improves the sufficiency of oxygen in each section, improves the uniformity, mixing uniformity, and combustion uniformity of the two gas media injection, and eliminates injection blind spots; the present invention has a simple structure, high strength, long service life, and is easy to implement; it can reduce the amount of coal used, ensure the beneficial effects of injection-assisted sintering in energy saving, emission reduction, and quality improvement, thereby improving the strength and output of sintered ore. Therefore, compared with the prior art, the present invention has a simple structure and strong practicality, can improve the quality and stability of sintered products, and improve the environmental protection and economy of sintering production. It can be foreseen that it has huge development potential in the future market.

[0096] 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 combined plate-type blowing device, characterized in that: It comprises a plurality of blowing structures arranged in parallel along the running direction of the sintering machine, wherein each group of the blowing structures is located above the sintering machine, and the blowing airflows of each group of the blowing structures are isolated from each other; Each of the injection structures includes a plurality of injection plates, a hydrogen-rich gas injection pipe, a combustion-supporting air pipe, and a combustion-supporting air branch pipe. A central cavity is provided in each of the injection plates. A plurality of injection holes arranged in a matrix are provided at the bottom of each of the injection plates. The hydrogen-rich gas injection pipe and each of the injection holes are connected to the central cavity. The length of the central cavity is greater than or equal to the transverse width of the sintering machine. A sealing cover is buckled downward from the top of each of the injection plates. The combustion air exhaust pipes are arranged in a matrix, the tops of the combustion air exhaust pipes are connected to the combustion air branch pipes, the combustion air exhaust pipes pass through the injection plate body from top to bottom through the sealing cover, and the bottom outlets of the combustion air exhaust pipes are at the same height as the bottoms of the injection holes. During injection, the hydrogen-rich gas and the combustion air form a mesh-like injection airflow above the sintering machine. Each of the hydrogen-rich gas injection pipes is connected to the hydrogen-rich gas injection main pipe via a hydrogen-rich gas injection branch pipe, and the combustion-supporting air branch pipe is connected to the combustion-supporting air main pipe; 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; The hydrogen-rich gas injection exhaust pipe and the hydrogen-rich gas injection branch pipe are arranged in a flexible connection.

2. The sintering machine combined plate-type blowing device according to claim 1, characterized in that: A gas regulating valve is provided on each of the hydrogen-rich fuel gas injection branch pipes.

3. The sintering machine combined plate-type blowing device according to claim 1, characterized in that: A combustion-supporting air regulating valve is provided on the combustion-supporting air main pipe.

4. The sintering machine combined plate-type blowing device according to claim 1, characterized in that: Partition plates are respectively provided at both ends of each mounting frame along the running direction of the sintering machine, and the partition plates are used to isolate the blowing airflows of two adjacent groups of the blowing structures.

5. The sintering machine combined plate-type blowing device according to claim 1, characterized in that: Wheels are arranged at the bottom of each mounting frame.

6. The combined plate-type blowing device for a sintering machine according to claim 5, characterized in that: Tracks are respectively arranged below both sides of each mounting frame along the running direction of the sintering machine, and the wheels move along the tracks.

7. The combined plate-type blowing device for a sintering machine according to claim 1, characterized in that: The combustion-supporting air branch pipe and the combustion-supporting air main pipe are arranged in a flexible connection.

8. The combined plate-type blowing device for a sintering machine according to claim 1, characterized in that: The blowing plate body is provided with a plurality of first mounting holes which pass through the first mounting holes in an up-and-down manner, and the combustion-supporting air exhaust pipe is sealed and passes through each of the first mounting holes.

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