Raw gas reforming system and process for hydrogen-based shaft furnace for ironmaking

Abstract

The application discloses a raw material gas reforming system and process for iron smelting hydrogen-based shaft furnace. The system comprises a reforming furnace and a high-temperature flue gas generator arranged outside the reforming furnace. The reforming furnace comprises a furnace body and a plurality of high-temperature reaction tubes filled with catalysts and arranged uniformly through the bottom and the top of the furnace body. The furnace body is sequentially divided into an upper cavity, a reaction chamber and a lower cavity. A plurality of upper inter-cavity holes are uniformly arranged at the bottom of the upper cavity, and a plurality of lower inter-cavity holes are uniformly arranged at the top of the lower cavity. The upper inter-cavity holes, the lower inter-cavity holes and the high-temperature reaction tubes are arranged in a staggered array. The inlet of the high-temperature reaction tube is connected with a raw material gas mixer, and the outlet is connected with a raw material gas recovery pipeline. A preheater is arranged on the inlet or outlet pipeline of the raw material gas mixer. The high-temperature flue gas generator is connected with one cavity of the reforming furnace through a flue gas inlet pipeline, and the other cavity is connected with a flue gas discharge pipeline. The high-temperature flue gas generator is used to generate high-temperature flue gas to provide a high-temperature environment for the reforming furnace, so that the reforming efficiency can be improved, and the failure rate can be reduced.

Description

Technical Field

[0001] This invention relates to the field of iron and steel metallurgy technology, and in particular to a raw material gas reforming system and process for hydrogen-based vertical shaft furnaces in ironmaking, belonging to the raw material gas treatment system and process for direct reduction ironmaking and hydrogen metallurgy. Background Technology

[0002] Vertical shaft furnace ironmaking is a direct reduction reaction, and the raw materials used are generally natural gas or coke oven gas. The main component of these two gases is methane (CH4). Methane cannot directly participate in the direct reduction reaction and generally needs to be reformed into CO and H2. There are generally two pathways for the reforming reaction: the first involves adding steam and heating at high temperature, with the chemical reaction equation CH4 + H2O = CO + 3H2; the second involves adding CO2 and heating at high temperature, with the chemical reaction equation CH4 + CO2 = 2CO + 2H2. Both of these reactions are completed at high temperature in the reformer under the action of a catalyst.

[0003] In order to obtain a uniform high-temperature environment inside the natural gas reformer, dozens of small burners are arranged at the bottom or top of the reformer. However, the inventors of this application recognize that this process is complex, dozens of small burners are arranged on the reformer shell, making control difficult and resulting in a high equipment failure rate. Furthermore, the heating method of dozens of small burners can easily lead to uneven temperature distribution inside the reformer, thereby affecting the reforming quality of natural gas. Summary of the Invention

[0004] According to one embodiment of the present invention, the objective is to provide a feed gas reforming system and process for a hydrogen-based vertical shaft furnace in ironmaking. This invention eliminates the dozens of low-power burners in the original reforming furnace, instead employing a single high-power high-temperature flue gas generator to produce high-temperature flue gas, which is then introduced into the reforming furnace to provide a high-temperature environment for the reforming of feed gases such as natural gas. Simultaneously, the high-temperature flue gas is evenly distributed through inter-chamber orifices evenly arranged in the upper and lower chambers, ensuring uniform entry into the reaction chamber and thus uniform heating of the feed gas within the high-temperature reaction tubes. The system of this invention has a simple and reliable structure, a simple process, and convenient control, which can improve reforming efficiency and significantly reduce equipment failure rate.

[0005] The above objective can be achieved through the following technical solutions:

[0006] According to one aspect of the present invention, a feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking is provided, comprising: a reformer and a high-temperature flue gas generator disposed outside the reformer, wherein...

[0007] The reformer includes: a furnace body and multiple high-temperature reaction tubes evenly arranged through the bottom and top of the furnace body; wherein, the interior of the high-temperature reaction tubes is filled with a catalyst; the interior of the furnace body is divided into three parts from top to bottom: an upper cavity, a reaction chamber, and a lower cavity; multiple upper cavity holes are evenly distributed on the cavity partition plate at the bottom of the upper cavity, and multiple lower cavity holes are evenly distributed on the cavity partition plate at the top of the lower cavity; wherein, the upper cavity holes, lower cavity holes, and high-temperature reaction tubes are arranged in an alternating array;

[0008] The inlet of the high-temperature reaction tube is connected to the raw material gas mixer via a raw material gas inlet pipeline, and the outlet is connected to the raw material gas recovery pipeline; the raw material gas mixer is used to mix the raw material gas and the reaction gas, and a preheater is installed on the inlet or outlet pipeline;

[0009] The high-temperature flue gas generator is connected to the interior of one chamber of the reformer via a flue gas inlet pipe, and the other chamber is connected to a flue gas outlet pipe.

[0010] Optionally, the raw material gas inlet pipeline includes a main raw material gas inlet pipe and multiple raw material gas inlet branch pipes connected thereto; the raw material gas recovery pipeline includes a main raw material gas recovery pipe and multiple raw material gas recovery branch pipes connected thereto; wherein, the inlet and outlet of a high-temperature reaction tube are respectively connected to a raw material gas inlet branch pipe and a raw material gas recovery branch pipe.

[0011] Optionally, the flue gas inlet pipeline includes a main flue gas inlet pipe and multiple flue gas inlet branch pipes connected thereto, through which the high-temperature flue gas in the main flue gas inlet pipe is sent to the reformer; the flue gas outlet pipeline includes a main flue gas outlet pipe and multiple flue gas outlet branch pipes connected thereto, through which the waste flue gas in the reformer is discharged through the main flue gas outlet pipe.

[0012] Optionally, there may be one or more reformers; and when there are multiple reformers, they are arranged in parallel, and the flue gas inlet branch pipes are evenly distributed and connected to each reformer.

[0013] Optionally, it may also include: one or more standby high-temperature flue gas generators connected in parallel with the high-temperature flue gas generator.

[0014] Optionally, the furnace wall and cavity partition plates of the reformer are provided with refractory material layers and heat insulation material layers; the outer shell of the high-temperature reaction tube is made of metal.

[0015] Optionally, the feed gas is a methane-containing gas, including natural gas and coke oven gas, and the reaction gas is water vapor or carbon dioxide.

[0016] According to another aspect of the present invention, the present invention provides a feed gas reforming process for a hydrogen-based vertical shaft furnace in ironmaking, wherein the reforming is performed using the aforementioned feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking, comprising:

[0017] High-temperature flue gas is generated by a high-temperature flue gas generator. The high-temperature flue gas enters the reformer from the flue gas inlet pipe through one chamber of the reformer and heats the high-temperature reaction tube to cause a reforming reaction. The heated waste flue gas is discharged from the other chamber of the reformer.

[0018] The raw gas is mixed with the reactor, preheated, and then enters the high-temperature reaction tube through the raw gas inlet pipeline. Under the action of the catalyst in the high-temperature reaction tube, a reforming reaction occurs. The mixed gas generated after the reaction enters the raw gas recovery pipeline, and after treatment, it enters the hydrogen-based vertical furnace.

[0019] Optionally, the exhaust gas can be used for preheating.

[0020] Optionally, it also includes: using the discharged waste gas to preheat the raw materials used in the high-temperature flue gas generator.

[0021] Beneficial Effects: According to one embodiment of the present invention, by eliminating dozens of low-power burners in the original reformer, a single high-power high-temperature flue gas generator is used to generate high-temperature flue gas, which is then uniformly fed into the reformer. The high-temperature flue gas is evenly distributed into the reaction chamber through the upper and lower chambers and their inter-chamber orifices. The inter-chamber orifices and the high-temperature reaction tubes are arranged in a staggered array, allowing the high-temperature flue gas to more uniformly heat the high-temperature reaction tubes within the reaction chamber, thus efficiently reforming CH4 in raw materials such as natural gas into CO and H2. The system structure of this invention is simple and reliable, the process control is convenient, reforming efficiency is improved, and the equipment failure rate is significantly reduced. Furthermore, the high-temperature flue gas generator is not installed on the reformer shell but is arranged outside the reformer, connected to one chamber of the reformer via a high-temperature flue gas inlet pipe, making operation more convenient and subsequent maintenance simpler. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to one embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of AA section.

[0024] Figure 3 for Figure 1 Schematic diagram of the BB cross-section.

[0025] Reference numerals in the attached diagram: 1. Reformer; 2. High-temperature flue gas generator; 3. Flue gas inlet main; 4. Flue gas inlet branch; 5. Flue gas outlet main; 6. Flue gas outlet branch; 7. Raw material gas mixer; 8. Preheater; 9. Raw material gas inlet main; 10. Raw material gas inlet branch; 11. Raw material gas recovery main; 12. Raw material gas recovery branch; 101. Upper chamber; 102. Upper chamber inter-hole; 103. Reaction chamber; 104. High-temperature reaction tube; 105. Lower chamber inter-hole; 106. Lower chamber. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below with reference to embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] This invention provides a feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking, comprising a reformer and a high-temperature flue gas generator arranged outside the reformer. This invention eliminates the dozens of low-power burners in the original reformer, instead using a single high-power high-temperature flue gas generator to produce high-temperature flue gas, significantly reducing equipment failure rates. Simultaneously, by improving the structure of the reformer, the high-temperature flue gas is uniformly fed into the reformer to evenly heat the feed gas, thereby improving reforming efficiency.

[0028] Figures 1 to 3 The diagram schematically illustrates the structure of a feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking, provided in one embodiment of the present invention. For example... Figure 1 As shown, the system includes: a reformer 1, a high-temperature flue gas generator 2, a flue gas inlet main 3, a flue gas inlet branch 4, a flue gas outlet branch 6, a flue gas outlet main 5, a raw material gas mixer 7, a preheater 8, a raw material gas inlet main 9, a raw material gas inlet branch 10, a high-temperature reaction tube 104, a raw material gas recovery branch 12, and a raw material gas recovery main 11.

[0029] The reformer 1, as Figure 1As shown, the furnace includes a furnace body and multiple high-temperature reaction tubes 104 evenly arranged through the bottom and top of the furnace body. The interior of the furnace body is divided into three parts from top to bottom: an upper chamber 101, a reaction chamber 103, and a lower chamber 106, forming a three-chamber structure. Furthermore, the height of the reaction chamber 103 is greater than the heights of the upper chamber 101 and the lower chamber 106, so that the length of the high-temperature reaction tubes 104 located within the reaction chamber 103 meets the reaction requirements, ensuring reaction efficiency. Multiple upper chamber holes 102 are evenly distributed on the chamber partition plate at the bottom of the upper chamber 101, and multiple lower chamber holes 105 are evenly distributed on the chamber partition plate at the top of the lower chamber 106.

[0030] The high-temperature flue gas generator 2, the flue gas inlet main pipe 3, and the flue gas inlet branch pipe 4 are connected in sequence. The flue gas inlet branch pipe 4 is connected to the interior of the upper chamber 101. The lower chamber 106 is provided with a waste flue gas outlet, which is connected to the flue gas outlet branch pipe 6. The flue gas outlet branch pipe 6 is connected to the flue gas outlet main pipe 5. Through the arrangement of the upper chamber 101, the lower chamber 106, and the intercavity holes, the high-temperature flue gas is evenly introduced into the reaction chamber 103 to uniformly heat the high-temperature reaction tube 104, and then discharged into the lower chamber 106 through the intercavity hole 105.

[0031] In a preferred embodiment, the upper cavity aperture 102, the lower cavity aperture 105, and the high-temperature reaction tube 104 are arranged in a staggered array, as shown in the reference. Figure 2 and Figure 3 As shown, the high-temperature reaction tube 104 is arranged in an alternating array with the lower cavity inter-hole 105 and the upper cavity inter-hole 102. This arrangement allows the high-temperature flue gas to heat the high-temperature reaction tube 104 more uniformly, thereby enabling the efficient reforming of CH4 in raw materials such as natural gas into CO and H2.

[0032] In this embodiment, high-temperature flue gas enters from the upper chamber 101 and exits from the lower chamber 106, but is not limited to this. The flow pattern of high-temperature flue gas in the reformer 1 can be either top-in, bottom-out, or bottom-in, top-out. When high-temperature flue gas flows into and out of the reformer 1, the number of inlet and outlet holes can be one or more. For example, each of the multiple flue gas inlet branch pipes 4 can enter the reformer 1 through a separate inlet hole. The positions of the high-temperature flue gas inlet and outlet holes can be located at suitable positions on the four sides or top of the reformer 1, such as... Figure 1 As shown, the inlet and outlet holes are respectively set on opposite sides of the reformer 1, which is more conducive to the flow and discharge of high-temperature flue gas.

[0033] Furthermore, in this invention, the structure of the reformer 1 furnace body can be an integral structure, that is, the furnace body and the two-chamber partition plates are integrally formed to constitute a three-chamber furnace body structure consisting of an upper chamber 101, a reaction chamber 103, and a lower chamber 106. Alternatively, it can be an improvement on a conventional reformer structure, for example, by evenly distributing inter-chamber holes at the top and bottom of a conventional furnace body, and using external pipe structures at the top and bottom to form the upper chamber 101 and the lower chamber 106, while the original furnace body interior serves as the reaction chamber. In this invention, the inner wall of the reformer 1 furnace body and the inter-chamber partition plates are provided with refractory material layers and thermal insulation material layers according to process requirements.

[0034] The multiple high-temperature reaction tubes 104, such as Figures 1 to 3 As shown, the catalyst is arranged in an array throughout the furnace body and filled inside. The raw material gas mixer 7, preheater 8, raw material gas main inlet pipe 9, and raw material gas branch inlet pipe 10 are connected in sequence. The raw material gas branch inlet pipe 10 is connected to the inlet of the high-temperature reaction pipe 104, and the outlet of the high-temperature reaction pipe 104 is connected to the raw material gas recovery branch pipe 12. The raw material gas recovery branch pipe 12 is connected to the raw material gas recovery main pipe 11. The gas in the raw material gas recovery main pipe 11 is processed and then sent to the ironmaking hydrogen-based vertical shaft furnace (not shown) to participate in the direct reduction reaction. The raw material gas used in the ironmaking hydrogen-based vertical shaft furnace raw material gas reforming process is a methane-containing gas, such as natural gas, coke oven gas, or other methane-rich gases. The reaction gas used is water vapor or carbon dioxide.

[0035] In this embodiment, the preheater 8 is connected to the outlet of the raw material gas mixer 7. The raw material gas is first mixed with the reaction gas (steam / CO2) in the raw material gas mixer, and then preheated by the preheater. However, it is not limited to this. The positions of the raw material gas mixer 7 and the preheater 8 in the process can be interchanged. The preheater 8 can also be used to preheat the feed entering the raw material gas mixer 7, that is, to preheat the raw material gas and the reaction gas separately.

[0036] Furthermore, in this embodiment, the inlet of the high-temperature reaction tube 104 is located at the bottom, and the outlet is located at the top, but it is not limited to this. The flow direction of the reformed gas can be either top-in, bottom-out, or bottom-in, top-out. Each high-temperature reaction tube 104 has its inlet connected to a feed gas inlet branch pipe 10 and its outlet connected to a feed gas recovery branch pipe. The outer shell of the high-temperature reaction tube 104 is made of metal, and its interior is filled with a catalyst. The feed gas undergoes a reforming reaction under the action of the catalyst in a high-temperature heating environment.

[0037] Furthermore, on each pipeline in the feed gas reforming system for the hydrogen-based vertical shaft furnace of ironmaking, corresponding shut-off valves, control valves, and compensators can be installed as needed to facilitate control.

[0038] In an optional embodiment, the flue gas discharge main 5 is connected to the heat source inlet of the preheater 8, meaning the waste flue gas discharged from the reformer 1 can be used to preheat the reformed gas. Furthermore, the flue gas discharge main 5 can also be connected to a high-temperature flue gas generator 2, such as a high-temperature flue gas generator furnace. This generator primarily produces high-temperature flue gas, focusing on efficient heat generation and flue gas extraction to ensure effective utilization of thermal energy and smooth discharge of flue gas. It is typically used in heat treatment processes in industrial settings, usually employing solid / gaseous fuels (such as coal, biomass, etc.) to generate high-temperature flue gas through combustion. Connecting the flue gas discharge main 5 to the high-temperature flue gas generator allows the waste flue gas discharged from the reformer 1 to preheat the fuel gas and combustion air used in the high-temperature flue gas generator, such as coal gas and air. By fully utilizing the waste heat from the flue gas, system energy consumption is reduced.

[0039] In this invention, there may be one or more reformers 1. When there are multiple reformers 1, they are arranged in parallel. In the parallel arrangement, the flue gas inlet branch pipes 4 are evenly distributed and connected to each reformer 1.

[0040] In addition, to further improve safety and stability, in optional embodiments, one or more backup high-temperature flue gas generators can be set up, for example, two high-temperature flue gas generators can be used, one for use and one for backup, which provides higher safety and stability.

[0041] The following is combined Figure 1 The illustrated feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking provides a clear and detailed description of the feed gas reforming process in one embodiment of the present invention. In this embodiment, the feed gas is natural gas.

[0042] Principle: A mixture of gas containing the raw material gas to be reformed and the reaction gas is introduced into the high-temperature reaction tube 104. High-temperature flue gas is introduced into the reformer 1. During the process, the high-temperature flue gas heats the high-temperature reaction tube 104. Under the action of the catalyst filled in the high-temperature reaction tube 104, the raw material gas in the high-temperature reaction tube is efficiently reformed into CO and H2. The reformed gas generated after the reaction can be recovered and then enters the hydrogen-based vertical shaft furnace for ironmaking to participate in the direct reduction reaction.

[0043] The reforming process in this embodiment includes the following two media flow directions:

[0044] Process 1 is a high-temperature flue gas heating process:

[0045] Coal gas and air enter the high-temperature flue gas generator 2 and are burned to produce high-temperature flue gas. The high-temperature flue gas enters the flue gas inlet main pipe 3 and is evenly distributed through the flue gas inlet branch pipe 4 and the upper cavity inter-hole. It enters the reformer 1 and heats the high-temperature reaction tube to heat the raw material gas and reaction gas that need to be reformed. After heating, waste flue gas is generated. The waste flue gas enters the flue gas outlet branch pipe 6 and merges through the flue gas outlet main pipe 5. The residual heat in the waste flue gas is utilized (sent to the preheater to preheat the mixed gas that needs to be reformed) and then discharged.

[0046] In this process, after the high-temperature flue gas enters the reformer 1, it first enters the upper chamber 101, then enters the reaction chamber 103 through the upper chamber inter-hole 102 to heat the high-temperature reaction tube 104, and then enters the lower chamber 106 through the lower chamber inter-hole 105, and is discharged to the flue gas discharge main pipe 5 through the flue gas discharge branch pipe 6.

[0047] Process 2 is the reforming process for raw gas:

[0048] Natural gas and (water vapor or carbon dioxide) enter the raw material gas mixer 7 and mix evenly. The mixed gas enters the preheater 8 and is preheated to a certain temperature (using the preheating of the waste flue gas in process 1). It enters the raw material gas inlet main pipe 9 and is evenly distributed to the raw material gas inlet branch pipes 10. It enters the reformer 1 and is heated in the array of high-temperature reaction tubes 104. Under the action of the catalyst in the tubes, the material undergoes a reforming reaction. The mixed gas generated by the reforming reaction in each high-temperature reaction tube 104 first enters the raw material gas recovery branch pipe 12. Then, the reaction gas generated in multiple raw material gas recovery branch pipes 12 is collected through the raw material gas recovery main pipe 11. After treatment (including dehydration, heating, etc.), it enters the ironmaking hydrogen-based vertical shaft furnace as the raw material gas for the direct reduction reaction.

[0049] In the reformer 1, the high-temperature flue gas mainly heats the high-temperature reaction tube 104 in the reaction chamber 103, causing the natural gas and (water vapor or carbon dioxide) inside to undergo a chemical reaction under the action of a catalyst to produce carbon monoxide and hydrogen, thus completing the reforming process.

[0050] The description of this invention is given for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking, characterized in that, include: A reformer and a high-temperature flue gas generator located outside the reformer, wherein, The reforming furnace includes: a furnace body and multiple high-temperature reaction tubes evenly arranged through the bottom and top of the furnace body; wherein, the interior of the high-temperature reaction tubes is filled with a catalyst; the interior of the furnace body is divided into three parts from top to bottom: an upper cavity, a reaction chamber, and a lower cavity; multiple upper cavity holes are evenly distributed on the cavity partition plate at the bottom of the upper cavity, and multiple lower cavity holes are evenly distributed on the cavity partition plate at the top of the lower cavity; and the upper cavity holes, lower cavity holes, and high-temperature reaction tubes are arranged in an alternating array. The inlet of the high-temperature reaction tube is connected to the raw material gas mixer via a raw material gas inlet pipeline, and the outlet is connected to the raw material gas recovery pipeline; the raw material gas mixer is used to mix the raw material gas and the reaction gas, and a preheater is installed on the inlet or outlet pipeline; The high-temperature flue gas generator is connected to the interior of one chamber of the reformer via a flue gas inlet pipe, and the other chamber is connected to a flue gas outlet pipe.

2. The feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to claim 1, characterized in that, The raw material gas inlet pipeline includes a main raw material gas inlet pipe and multiple raw material gas inlet branch pipes connected thereto; the raw material gas recovery pipeline includes a main raw material gas recovery pipe and multiple raw material gas recovery branch pipes connected thereto; wherein, the inlet and outlet of a high-temperature reaction tube are respectively connected to a raw material gas inlet branch pipe and a raw material gas recovery branch pipe.

3. The feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to claim 1, characterized in that, The flue gas inlet pipeline includes a main flue gas inlet pipe and multiple flue gas inlet branch pipes connected to it. The high-temperature flue gas in the main flue gas inlet pipe is sent to the reformer through the multiple flue gas inlet branch pipes. The flue gas outlet pipeline includes a main flue gas outlet pipe and multiple flue gas outlet branch pipes connected to it. The waste flue gas in the reformer is discharged through the main flue gas outlet pipe.

4. The feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to claim 3, characterized in that, The reformer may be one or more; and when there are multiple reformers, the reformers are arranged in parallel, and the flue gas inlet branch pipes are evenly distributed and connected to each reformer.

5. The feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to claim 1, characterized in that, Also includes: One or more standby high-temperature flue gas generators connected in parallel with the high-temperature flue gas generator.

6. The feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to claim 1, characterized in that, The furnace body wall and cavity partition plates of the reformer are provided with refractory material layers and heat insulation material layers; the outer shell of the high-temperature reaction tube is made of metal.

7. The feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking according to claim 1, characterized in that, The raw material gas is a methane-containing gas, including natural gas and coke oven gas, and the reaction gas is water vapor or carbon dioxide.

8. A process for reforming feed gas for a hydrogen-based vertical shaft furnace in ironmaking, characterized in that, Reforming using the feed gas reforming system for a hydrogen-based vertical shaft furnace in ironmaking, as described in any one of claims 1-7, includes: High-temperature flue gas is generated by a high-temperature flue gas generator. The high-temperature flue gas enters the reformer from the flue gas inlet pipe through one chamber of the reformer and heats the high-temperature reaction tube to cause a reforming reaction. The heated waste flue gas is discharged from the other chamber of the reformer. The raw gas is mixed with the reactor, preheated, and then enters the high-temperature reaction tube through the raw gas inlet pipeline. Under the action of the catalyst in the high-temperature reaction tube, a reforming reaction occurs. The mixed gas generated after the reaction enters the raw gas recovery pipeline, and after treatment, it enters the hydrogen-based vertical furnace.

9. The feed gas reforming process for a hydrogen-based vertical shaft furnace in ironmaking according to claim 8, characterized in that, Preheating is achieved by utilizing the discharged waste gas.

10. The feed gas reforming process for a hydrogen-based vertical shaft furnace in ironmaking according to claim 8, characterized in that, It also includes: using the discharged waste gas to preheat the raw materials used in the high-temperature flue gas generator.

Images