Feed gas reforming system for iron-making hydrogen-based shaft furnace

Abstract

The utility model discloses a feed gas reforming system for an iron-making hydrogen-based shaft furnace. Comprising a reforming furnace and a high-temperature flue gas generator arranged outside the reforming furnace, and the reforming furnace comprises a furnace body and a plurality of high-temperature reaction tubes which penetrate through the bottom and the top of the furnace body, are uniformly arranged and are filled with catalysts; the interior of 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 distributed in the bottom of the upper cavity, and a plurality of lower inter-cavity holes are uniformly distributed in the top of the lower cavity; an inlet of the high-temperature reaction tube is connected with the feed gas mixer through a feed gas inlet pipeline, and an outlet is connected with a feed gas recovery pipeline; the high-temperature flue gas generator is connected into one cavity of the reforming furnace through a flue gas inlet pipeline, and the other cavity of the reforming furnace is connected with a flue gas discharge pipeline. The high-temperature flue gas generator is adopted to generate high-temperature flue gas to provide a high-temperature environment for reforming of raw material gas, so that the failure rate of equipment can be reduced, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel metallurgy, in particular to a raw material gas reforming system for a hydrogen-based shaft furnace in ironmaking, belonging to the raw material gas treatment system for direct reduction ironmaking and hydrogen metallurgy. Background Art

[0002] Shaft furnace ironmaking is a direct reduction reaction. The raw material gas used is generally natural gas or coke oven gas. The main components of these two gases are both methane (CH4). Methane cannot directly participate in the direct reduction reaction. Generally, it needs to be reformed into CO and H2. There are generally two ways for the reforming reaction. The first is to add steam and heat it at high temperature. The chemical reaction equation is CH4 + H2O = CO + 3H2. The second is to add CO2 and heat it at high temperature. The chemical reaction equation is CH4 + CO2 = 2CO + 2H2. The above two reactions are both completed by heating at high temperature in a reforming furnace under the action of a catalyst.

[0003] For the currently used natural gas reforming furnace, in order to obtain a uniform high-temperature environment inside the reforming furnace, dozens of small burners are arranged at the bottom or top of the reforming furnace. However, the inventors of this application have recognized that: this process is complex. Dozens of small burners are arranged on the reforming furnace shell, which is difficult to control, has a high equipment failure rate, and the heating method of dozens of small burners easily leads to uneven temperature distribution inside the reforming furnace, thereby affecting the reforming quality of natural gas. Summary of the Invention

[0004] According to an embodiment of the utility model, the purpose is to provide a raw material gas reforming system for a hydrogen-based shaft furnace in ironmaking. The utility model cancels dozens of small-power burners in the original reforming furnace, but uses a single high-power high-temperature flue gas generator to generate high-temperature flue gas and make it enter the reforming furnace to provide a high-temperature environment for the reforming of raw material gases such as natural gas. At the same time, the high-temperature flue gas is evenly distributed through the cavity holes uniformly arranged in the upper chamber and the lower chamber, so that it evenly enters the reaction chamber, thereby uniformly heating the raw material gas in the high-temperature reaction tube. The system structure of the utility model is simple and reliable, the process flow is simple, the control is convenient, the equipment failure rate can be greatly reduced, and the reforming efficiency can be improved.

[0005] The above purpose can be achieved through the following implementation modes of technical solutions:

[0006] According to one aspect of the present utility model, a raw gas reforming system for a hydrogen-based shaft furnace in ironmaking provided by the present utility model includes: a reforming furnace and a high-temperature flue gas generator arranged outside the reforming furnace. Among them, the reforming furnace includes: a furnace body and a plurality of uniformly arranged high-temperature reaction tubes penetrating through the bottom and top of the furnace body; wherein, a catalyst is filled inside the high-temperature reaction tubes; the inside of the furnace body is sequentially divided into three parts: an upper cavity, a reaction chamber, and a lower cavity from top to bottom. A plurality of upper cavity intermediate holes are uniformly arranged on the bottom cavity partition plate of the upper cavity, and a plurality of lower cavity intermediate holes are uniformly arranged on the top cavity partition plate of the lower cavity; the inlet of the high-temperature reaction tube is connected to a raw gas mixer through a raw gas inlet pipeline, and the outlet is connected to a raw gas recovery pipeline; the high-temperature flue gas generator is connected to a cavity inside the reforming furnace through a flue gas inlet pipeline, and the other cavity is connected to a flue gas discharge pipeline.

[0007] Optionally, a preheater is provided on the inlet or outlet pipeline of the raw gas mixer; the heat source inlet of the preheater is connected to the flue gas discharge pipeline for preheating using waste flue gas.

[0008] Optionally, the high-temperature flue gas generator is also connected to the flue gas discharge pipeline for preheating the raw materials using waste flue gas.

[0009] Optionally, the upper cavity intermediate holes, the lower cavity intermediate holes, and the high-temperature reaction tubes are arranged in a staggered array.

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

[0011] Optionally, the flue gas inlet pipeline includes a flue gas inlet main pipe and a plurality of flue gas inlet branch pipes connected thereto. The high-temperature flue gas in the flue gas inlet main pipe is sent into the reforming furnace through the plurality of flue gas inlet branch pipes; the flue gas discharge pipeline includes a flue gas discharge main pipe and a plurality of flue gas discharge branch pipes connected thereto. The high-temperature waste flue gas in the reforming furnace is discharged through the flue gas discharge main pipe through the plurality of flue gas discharge branch pipes.

[0012] Optionally, there is one reforming furnace.

[0013] Optionally, there are multiple reforming furnaces, and they are arranged in parallel. The flue gas inlet branch pipes are evenly distributed and connected to each reforming furnace.

[0014] Optionally, the system further includes: a standby high-temperature flue gas generator connected in parallel with the high-temperature flue gas generator.

[0015] Optionally, refractory material layers and thermal insulation material layers are provided on the furnace body wall and the cavity spacer plates of the reforming furnace; the outer shell of the high-temperature reaction tube is made of metal material.

[0016] Beneficial effects: According to an embodiment of the present invention, dozens of small-power burners in the original reforming furnace are cancelled, and a single high-power high-temperature flue gas generator is used to generate high-temperature flue gas. The high-temperature flue gas enters the reforming furnace evenly through the flue gas inlet pipeline into the first cavity of the reforming furnace, and evenly heats the high-temperature reaction tube so that the raw material gas to be reformed inside it undergoes a reforming reaction. The heated high-temperature waste flue gas is discharged from the other cavity of the reforming furnace; while the preheated and mixed raw material gas enters the high-temperature reaction tube through the raw material gas inlet pipeline and undergoes a reforming reaction under the action of the catalyst in the high-temperature reaction tube. The reformed gas generated after the reaction is recovered through the raw material gas recovery pipeline, and then enters the hydrogen-based shaft furnace after subsequent treatment. The system has a simple and reliable structure, convenient control, improves the reforming efficiency, and greatly reduces the equipment failure rate. In addition, the high-temperature flue gas generator is not installed on the reforming furnace shell, but is arranged outside the reforming furnace and is connected to one of its chambers through a high-temperature flue gas inlet pipeline, making the operation more convenient and the subsequent maintenance simpler.

[0017] In a preferred embodiment, the upper cavity holes, the lower cavity holes and the high-temperature reaction tubes are arranged in a staggered array. Further, the high-temperature flue gas can more evenly heat the high-temperature reaction tubes in the reaction chamber, enabling the efficient reforming of CH4 in raw material gases such as natural gas into CO and H2, and improving the reforming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the raw material gas reforming system for a hydrogen-based shaft furnace in an embodiment of the present invention;

[0019] Figure 2 is Figure 1 the sectional view taken along line A-A of

[0020] Figure 3 is Figure 1 the sectional view taken along line B-B of

[0021] Reference numerals: 1, reforming furnace; 2, high-temperature flue gas generator; 3, main flue gas inlet pipe; 4, branch flue gas inlet pipe; 5, main flue gas discharge pipe; 6, branch flue gas discharge pipe; 7, raw material gas mixer; 8, preheater; 9, main raw material gas inlet pipe; 10, branch raw material gas inlet pipe; 11, main raw material gas recovery pipe; 12, branch raw material gas recovery pipe; 101, upper chamber; 102, upper cavity hole; 103, reaction chamber; 104, high-temperature reaction tube; 105, lower cavity hole; 106, lower chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0023] A raw material gas reforming system for a hydrogen-based shaft furnace in ironmaking provided by the present utility model includes a reforming furnace and a high-temperature flue gas generator arranged outside the reforming furnace. The present utility model cancels dozens of small-power burners in the original reforming furnace and instead uses a single high-power high-temperature flue gas generator to generate high-temperature flue gas, greatly reducing the equipment failure rate. At the same time, by improving the structure of the reforming furnace, the high-temperature flue gas can be evenly sent into the reforming furnace to uniformly heat the high-temperature reaction tubes, improving the reforming efficiency, and enabling the CH4 in the raw material gas such as natural gas in the high-temperature reaction tubes to be effectively reformed into CO and H2.

[0024] Figures 1 to 3 Schematically shows the structure of a raw material gas reforming system for a hydrogen-based shaft furnace in ironmaking provided in an embodiment of the present utility model. As Figure 1 shown, the system includes: a reforming furnace 1, a high-temperature flue gas generator 2, a main flue gas inlet pipe 3, a branch flue gas inlet pipe 4, a branch flue gas discharge pipe 6, a main flue gas discharge pipe 5, a raw material gas mixer 7, a preheater 8, a main raw material gas inlet pipe 9, a branch raw material gas inlet pipe 10, a high-temperature reaction tube 104, a branch raw material gas recovery pipe 12, and a main raw material gas recovery pipe 11.

[0025] The reforming furnace 1, as Figure 1As shown in the figure, it includes: a furnace body and a plurality of high-temperature reaction tubes 104 uniformly arranged through the bottom and top of the furnace body. The interior of the furnace body is divided into three parts, namely, an upper chamber 101, a reaction chamber 103, and a lower chamber 106 from top to bottom in sequence. 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 in the reaction chamber 103 meets the reaction requirements and ensures the reaction efficiency. A plurality of upper chamber intermediate holes 102 are uniformly arranged on the chamber partition plate at the bottom of the upper chamber 101, and a plurality of lower chamber intermediate holes 105 are uniformly arranged on the chamber partition plate at the top of the lower chamber 106. Among them, a high-temperature flue gas generator 2, a main flue gas inlet pipe 3, and a branch flue gas inlet pipe 4 are connected in sequence. The branch flue gas inlet pipe 4 is connected to the inside of the upper chamber 101. The lower chamber 106 is provided with a high-temperature waste flue gas discharge port, which is connected to a flue gas discharge branch pipe 6. The flue gas discharge branch pipe 6 is connected to a main flue gas discharge pipe 5. Through the settings of the upper chamber 101, the lower chamber 106, and their intermediate holes, the high-temperature flue gas uniformly enters the reaction chamber 103 to heat the reforming gas in the high-temperature reaction tubes 104, and then enters the lower chamber 106 through the lower chamber intermediate holes 105 and is discharged.

[0026] Further, preferably, in this embodiment, the upper chamber intermediate holes 102, the lower chamber intermediate holes 105, and the high-temperature reaction tubes 104 are arranged in a staggered array. Refer to Figure 2 and Figure 3 As shown in the figure, the high-temperature reaction tubes 104 are arranged in a staggered array with the lower chamber intermediate holes 105 and in a staggered array with the upper chamber intermediate holes 102. This arrangement can make the high-temperature flue gas heat the high-temperature reaction tubes 104 more uniformly, so that CH4 in natural gas is efficiently reformed into CO and H2.

[0027] In this embodiment, the high-temperature flue gas enters from the upper chamber 101 and is discharged from the lower chamber 106. However, it is not limited to this. The flow mode of the high-temperature flue gas in the reforming furnace 1 can be from top to bottom or from bottom to top. When the high-temperature flue gas flows into and out of the reforming furnace 1, the number of inlet and outlet holes can be one or multiple. For example, each of the plurality of branch flue gas inlet pipes 4 enters the reforming furnace 1 through an inlet hole. The positions of the inlet and outlet holes can be set at appropriate positions on the four sides or the top of the reforming furnace 1. As Figure 1 shown in the figure, the inlet and outlet holes are respectively arranged on the opposite side surfaces of the reforming furnace 1, which is more conducive to the flow and discharge of the high-temperature flue gas.

[0028] In addition, in the present utility model, for the structure of the reforming furnace 1 furnace body, an integrated structure can be adopted, that is, the furnace body and the two-chamber spacer plate are integrally formed to form a three-chamber furnace body structure of the upper chamber 101, the reaction chamber 103, and the lower chamber 106 inside the furnace body. Of course, it can also be an improvement based on the conventional reforming furnace structure. For example, chamber holes are evenly arranged on the top and bottom of the conventional furnace body, and external pipeline structures are respectively adopted at the top and bottom to form the upper chamber 101 and the lower chamber 106, while the original inside of the furnace body serves as the reaction chamber. In the present utility model, a refractory material layer and a heat insulation material layer are provided on the inner wall of the reforming furnace 1 furnace body and the chamber spacer plate according to process requirements.

[0029] The multiple high-temperature reaction tubes 104, as Figures 1 to 3 shown, penetrate the furnace body and are arranged in an array with the upper chamber holes 102 and the lower chamber holes 105. Among them, the raw material gas mixer 7, the preheater 8, the raw material gas inlet main pipe 9, and the raw material gas inlet branch pipe 10 are connected in sequence. The raw material gas inlet branch pipe 10 is connected to the inlet of the high-temperature reaction tube 104, the outlet of the high-temperature reaction tube 104 is connected to the raw material gas recovery branch pipe 12, and the raw material gas recovery branch pipe 12 is connected to the raw material gas recovery main pipe 11. The reformed gas after reaction in the raw material gas recovery main pipe 11 can be sent to the hydrogen-based shaft furnace for ironmaking to participate in the direct reduction reaction after being processed.

[0030] The raw material gas mixer 7 is used to mix the raw material gas and the reaction gas. The raw material gas is a gas containing methane. The methane-containing gas can be, for example, natural gas, coke oven gas, or other methane-rich gases, etc. The reaction gas can be water vapor or carbon dioxide, which is a gas used for reforming reaction with the raw material gas.

[0031] In this embodiment, the preheater 8 is connected to the outlet of the raw material gas mixer 7. First, the raw material gas such as natural gas, coke oven gas, or other methane-rich gases is mixed with steam / CO2 in the raw material gas mixer, and then the preheater is used for preheating; 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, or the preheater 8 can also be used to preheat the feed entering the raw material gas mixer 7.

[0032] In addition, in this embodiment, the inlet of the high-temperature reaction tube 104 is located at the lower part and the outlet is located at the upper part, but it is not limited to this. The flow direction of the reformed gas can be from top to bottom or from bottom to top. Among them, the inlet of each high-temperature reaction tube 104 is connected to the raw material gas inlet branch pipe 10, and the outlet is connected to the raw material gas recovery branch pipe. The outer shell of the high-temperature reaction tube 104 is made of metal material, and the inside is filled with a catalyst. The raw material gas undergoes a reforming reaction under the action of the catalyst in a high-temperature heating environment.

[0033] In an alternative embodiment, the main flue gas discharge pipe 5 is connected to the heat source inlet of the preheater 8 to utilize the high-temperature waste flue gas discharged from the reforming furnace 1 to preheat the raw material gas, reaction gas, etc. that need to be reformed. In addition, the main flue gas discharge pipe 5 can also be connected to the preheating pipeline inlet of the high-temperature flue gas generator 2, that is, the high-temperature waste flue gas discharged from the reforming furnace 1 can also be used to preheat the fuel gas and combustion-supporting air required by the high-temperature flue gas generator 2. By making full use of the waste heat of the high-temperature waste flue gas, the system energy consumption is reduced.

[0034] In the present utility model, there can be one or multiple reforming furnaces 1. When there are multiple ones, the reforming furnaces 1 are arranged in parallel. When arranged in parallel, the flue gas inlet branch pipes 4 are evenly distributed and connected to each reforming furnace 1. In addition, in order to further improve safety and stability, in an alternative embodiment, a standby high-temperature flue gas generating furnace can also be provided. With two devices, one is in use and the other is in standby, the safety and stability are higher. Further, corresponding cut-off valves, control valves, compensators, etc. can be provided on each pipeline in the raw material gas reforming system for the hydrogen-based shaft furnace for ironmaking, so as to facilitate control.

[0035] The following takes natural gas as the raw material gas and combines Figure 1 as shown to describe the operation process of the raw material gas reforming system for the hydrogen-based shaft furnace for ironmaking in this embodiment as follows:

[0036] The principle of reforming the raw material gas using this system: The raw material gas and reaction gas are introduced into the high-temperature reaction tube 104, and high-temperature flue gas is introduced into the reforming furnace 1. During the process, the high-temperature flue gas heats the high-temperature reaction tube 104. Under the action of the catalyst inside the high-temperature reaction tube 104, the raw material gas therein is efficiently reformed into CO and H2. The reformed gas after the reaction, after further treatment such as dehydration and temperature increase, can then enter the hydrogen-based shaft furnace for ironmaking to participate in the direct reduction reaction.

[0037] The operation process includes the following two medium flow processes:

[0038] Process 1 is the high-temperature flue gas heating process:

[0039] Coal gas and air enter the high-temperature flue gas generator 2 and generate high-temperature flue gas after combustion → The high-temperature flue gas enters the main flue gas inlet pipe 3 → It is evenly distributed through the flue gas inlet branch pipes 4 and the upper cavity inter-holes → It enters the reforming furnace 1 and heats the high-temperature reaction tube to heat the raw material gas and reaction gas that need to be reformed therein → The waste flue gas is generated after heating → The waste flue gas enters the flue gas discharge branch pipe 6 → It converges through the main flue gas discharge pipe 5 → The waste 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.

[0040] Among them, after the high-temperature flue gas enters the reforming furnace 1, the high-temperature flue gas first enters the upper chamber 101, then evenly enters the reaction chamber 103 through the upper chamber intermediate hole 102 to heat the high-temperature reaction tube 104, and then enters the lower chamber 106 through the lower chamber intermediate hole 105, and is discharged to the flue gas discharge main pipe 5 through the flue gas discharge branch pipe 6.

[0041] Process 2 is the reforming process of the raw material gas:

[0042] Natural gas and (steam or carbon dioxide) enter the raw material gas mixer 7 and are mixed evenly → the mixed gas enters the preheater 8 and is preheated to a certain temperature (using the waste flue gas preheating in Process 1) → enters the raw material gas intake main pipe 9 → is evenly distributed to the raw material gas intake branch pipes 10 → enters the reforming furnace 1 and is heated in the array-arranged high-temperature reaction tubes 104, and the material undergoes a reforming reaction under the action of the catalyst in the tubes. 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 the multi-column raw material gas recovery branch pipes 12 is aggregated through the raw material gas recovery main pipe 11 → after being processed (including dehydration, temperature increase, etc.), it enters the hydrogen-based shaft furnace for ironmaking as the raw material gas for the direct reduction reaction.

[0043] Among them, in the reforming furnace 1, the high-temperature flue gas mainly heats the high-temperature reaction tube 104 in the reaction chamber 103, so that the natural gas and (steam or carbon dioxide) in it undergo a chemical reaction under the action of the catalyst to produce carbon monoxide and hydrogen, and the reforming process is completed.

[0044] The description of the present invention is given for purposes of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A raw gas reforming system for a hydrogen-based shaft furnace in ironmaking, characterized in that, Including: A reforming furnace and a high-temperature flue gas generator arranged outside the reforming furnace, wherein, The reforming furnace includes: a furnace body and a plurality of uniformly arranged high-temperature reaction tubes penetrating through the bottom and top of the furnace body; wherein, a catalyst is filled inside the high-temperature reaction tubes; the inside of the furnace body is sequentially divided into an upper cavity, a reaction chamber, and a lower cavity from top to bottom. A plurality of upper cavity inter-holes are uniformly arranged on the bottom cavity partition plate of the upper cavity, and a plurality of lower cavity inter-holes are uniformly arranged on the top cavity partition plate of the lower cavity; The inlet of the high-temperature reaction tube is connected to a raw material gas mixer through a raw material gas inlet pipeline, and the outlet is connected to a raw material gas recovery pipeline; The high-temperature flue gas generator is connected to a cavity of the reforming furnace through a flue gas inlet pipeline, and the other cavity is connected to a flue gas discharge pipeline.

2. The raw material gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 1, characterized in that, A preheater is provided on the inlet or outlet pipeline of the raw material gas mixer; the heat source inlet of the preheater is connected to the flue gas discharge pipeline for preheating using waste flue gas.

3. The raw gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 1, characterized in that, The high-temperature flue gas generator is also connected to the flue gas discharge pipeline for preheating the raw material using waste flue gas.

4. The raw material gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 1, characterized in that, The upper cavity inter-holes, the lower cavity inter-holes, and the high-temperature reaction tubes are arranged in a staggered array.

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

6. The raw gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 1, characterized in that The flue gas inlet pipeline includes a flue gas inlet main pipe and a plurality of flue gas inlet branch pipes connected thereto. The high-temperature flue gas in the flue gas inlet main pipe is sent into the reforming furnace through the plurality of flue gas inlet branch pipes; the flue gas discharge pipeline includes a flue gas discharge main pipe and a plurality of flue gas discharge branch pipes connected thereto. The high-temperature waste flue gas in the reforming furnace is discharged through the flue gas discharge main pipe through the plurality of flue gas discharge branch pipes.

7. The raw gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 1, wherein There is one reforming furnace.

8. The raw gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 6, characterized in that, There are multiple reforming furnaces, and they are arranged in parallel. The flue gas inlet branch pipes are evenly distributed and connected to each reforming furnace.

9. The raw gas reforming system for a hydrogen-based shaft furnace in ironmaking according to claim 1, wherein, The system further includes: a standby high-temperature flue gas generator connected in parallel with the high-temperature flue gas generator.

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

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