A hydrogen energy-based full-oxygen combustion technology-based steel ingot heating furnace

Abstract

A kind of steel ingot heating furnace based on hydrogen energy full-oxygen combustion technology, including hydrogen energy full-oxygen burner, oxygen valve group, hydrogen-rich fuel valve group, furnace body, flue, oxygen valve group is connected hydrogen energy full-oxygen burner by oxygen pipeline, hydrogen-rich fuel valve group is connected hydrogen energy full-oxygen burner by hydrogen-rich fuel pipeline, hydrogen energy full-oxygen burner is located on the upper portion of furnace wall of furnace body two sides, flue is located on the lower portion of furnace wall of furnace body two sides, oxygen valve group includes oxygen main pipeline and multiple oxygen branch pipelines, hydrogen-rich fuel valve group includes hydrogen-rich fuel main pipeline and multiple hydrogen-rich fuel branch pipelines, each hydrogen energy full-oxygen burner is connected a group of hydrogen-rich fuel branch pipelines and a group of oxygen branch pipelines, and is connected hydrogen-rich fuel main pipeline and oxygen main pipeline respectively by hydrogen-rich fuel branch pipeline and oxygen branch pipeline.The utility model combines hydrogen energy combustion technology with full-oxygen combustion technology, so that hydrogen-rich fuel is fully combusted, combustion efficiency is higher, and carbon emission of combustion production is significantly reduced, to achieve the effect of energy saving and emission reduction, green and low carbon.

Description

Technical Field

[0001] This utility model relates to the field of forging heating furnace technology, and in particular to a steel ingot heating furnace based on hydrogen-oxygen combustion technology. Background Technology

[0002] Hydrogen-oxygen combustion technology is a revolutionary clean combustion technology that uses hydrogen-rich gas as fuel and pure oxygen as an oxidizer to achieve a highly efficient, clean, and low-pollution combustion process. Against the backdrop of global energy transition, this technology is becoming an important direction for deep decarbonization in the industrial sector. Compared with traditional combustion, hydrogen-oxygen combustion has significant advantages such as high combustion efficiency, low pollutant emissions, and high energy density, and is currently in the technology development stage.

[0003] Chinese patent document CN221924567U discloses a heating furnace that combines low-temperature combustion and high-temperature pure oxygen combustion functions. It includes a preheating section, a heating section, and a soaking section connected in sequence. Both the heating section and the soaking section are equipped with burners that combine low-temperature combustion and high-temperature pure oxygen combustion functions. The burner includes a burner nozzle, a natural gas channel, a combustion aid channel, and a pure oxygen channel. The combustion aid channel is sleeved outside the natural gas channel, forming a sleeve structure, which is connected to the burner nozzle. A pure oxygen channel is provided on the burner nozzle outside the combustion aid channel. This utility model uses natural gas as fuel for pure oxygen combustion. This method improves fuel utilization, but the combustion process produces a large amount of CO2, increasing carbon emissions, which is no longer suitable for the green and low-carbon development direction of the metallurgical industry. Therefore, it is urgent for those skilled in the art to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a steel ingot heating furnace based on hydrogen-oxygen combustion technology to solve the problems mentioned in the background section. This invention combines hydrogen combustion technology with oxygen combustion technology, enabling more complete combustion of hydrogen-rich fuel, resulting in higher combustion efficiency and a significant reduction in carbon emissions, thus achieving a comprehensive effect of energy conservation, emission reduction, and green low-carbon development.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A steel ingot heating furnace based on hydrogen-oxygen combustion technology includes hydrogen-oxygen burners, oxygen valve groups, hydrogen-rich fuel valve groups, a furnace body, and a flue. The hydrogen-oxygen burners are located on the upper part of the furnace walls on both sides of the furnace body, and the flue is located on the lower part of the furnace walls on both sides of the furnace body. The oxygen valve groups include a main oxygen pipeline and multiple sets of oxygen branch pipelines, as well as valve groups installed on the main oxygen pipeline and oxygen branch pipelines. The hydrogen-rich fuel valve groups include a main hydrogen-rich fuel pipeline and multiple sets of hydrogen-rich fuel branch pipelines, as well as valve groups installed on the main hydrogen-rich fuel pipeline and hydrogen-rich fuel branch pipelines. Each hydrogen-oxygen burner is connected to a set of hydrogen-rich fuel branch pipelines and a set of oxygen branch pipelines, and is connected to the main hydrogen-rich fuel pipeline and the main oxygen pipeline through the hydrogen-rich fuel branch pipelines and oxygen branch pipelines, respectively.

[0006] The hydrogen-powered oxygen burner is a flameless combustion burner.

[0007] Two hydrogen-powered oxygen burners are installed on each side of the furnace wall, and are set at an angle of 30° to 45° with the furnace wall in the horizontal direction. The hydrogen-powered oxygen burners on both sides of the furnace wall are arranged diagonally.

[0008] The flue is located at the center of the bottom of the two furnace walls, with one flue on each side of the furnace wall.

[0009] The oxygen valve assembly includes one main oxygen line and four branch oxygen lines. The main oxygen line is provided with a first oxygen pressure sensor, an oxygen flame arrester, an oxygen filter, an oxygen pressure reducing valve, and a first oxygen pneumatic shut-off valve in sequence. The branch oxygen lines are provided with a second oxygen pneumatic shut-off valve, an oxygen flow sensor, an oxygen flow regulating valve, and a second oxygen pressure sensor in sequence.

[0010] The hydrogen-rich fuel valve assembly includes one main hydrogen-rich fuel pipeline and four branch hydrogen-rich fuel pipelines. The main hydrogen-rich fuel pipeline is sequentially equipped with a first hydrogen-rich fuel pressure sensor, a hydrogen-rich fuel flame arrester, a hydrogen-rich fuel filter, a hydrogen-rich fuel pressure reducing valve, and a second hydrogen-rich fuel pneumatic shut-off valve. The branch hydrogen-rich fuel pipelines are sequentially equipped with a second hydrogen-rich fuel pneumatic shut-off valve, a hydrogen-rich fuel flow sensor, a hydrogen-rich fuel flow regulating valve, and a second hydrogen-rich fuel pressure sensor.

[0011] The furnace body includes a furnace cover, a furnace wall, and a furnace bottom. The furnace cover is located at the top of the furnace wall, and the furnace bottom is located at the bottom of the furnace wall.

[0012] Compared with existing technologies, the beneficial effects of this utility model are: 1) The main component of the hydrogen-powered oxygen-fuel combustion medium is H2, accounting for more than 60%, while the carbon-based component of the fuel is greatly reduced, and the flue gas component is mainly H2O, which minimizes CO2 emissions.

[0013] 2) The use of flameless oxy-fuel combustion technology promotes the complete combustion of hydrogen fuel, increases the flame temperature, and improves the heating efficiency; at the same time, the amount of flue gas after combustion is reduced, the heat loss of flue gas is reduced, and the thermal efficiency of the heating furnace is improved.

[0014] 3) The hydrogen-powered oxygen burner is arranged diagonally and uses tangential swirl combustion. The high-temperature flue gas circulates in the furnace along the tangential pitch circle, which fully agitates the atmosphere in the furnace, improves the convective heat transfer effect, and makes the furnace temperature more uniform.

[0015] 4) Each hydrogen-powered oxygen burner can be individually controlled and has an independent automatic oxygen-fuel ratio control function, achieving precise flame control and better furnace temperature uniformity. Attached Figure Description

[0016] Figure 1 This is a longitudinal cross-sectional view of a steel ingot heating furnace based on hydrogen-oxygen combustion technology according to this utility model.

[0017] Figure 2 This is a cross-sectional view of a steel ingot heating furnace based on hydrogen-oxygen combustion technology according to this utility model.

[0018] Figure 3 This is a schematic diagram of the hydrogen-rich fuel valve assembly and oxygen valve assembly of this utility model.

[0019] In the diagram: 1-Hydrogen-fueled burner, 2-Oxygen valve assembly, 3-Hydrogen-rich fuel valve assembly, 4-Flue, 5-Steel ingot, 6-Furnace cover, 7-Furnace wall, 8-Furnace bottom, 21-Main oxygen pipeline, 22-Oxygen branch pipeline, 31-Main hydrogen-rich fuel pipeline, 32-Hydrogen-rich fuel branch pipeline, 201-First oxygen pressure sensor, 202-Oxygen flame arrester, 203-Oxygen filter, 204-Oxygen pressure reducing valve, 205-First oxygen pneumatic shut-off valve, 206-Second oxygen pneumatic shut-off valve. 207-Oxygen flow sensor, 208-Oxygen flow regulating valve, 209-Second oxygen pressure sensor, 301-First hydrogen-rich fuel pressure sensor, 302-Hydrogen-rich fuel flame arrester, 303-Hydrogen-rich fuel filter, 304-Hydrogen-rich fuel pressure reducing valve, 305-Second hydrogen-rich fuel pneumatic shut-off valve, 306-Second hydrogen-rich fuel pneumatic shut-off valve, 307-Hydrogen-rich fuel flow sensor, 308-Hydrogen-rich fuel flow regulating valve, 309-Second hydrogen-rich fuel pressure sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. The specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. All reasonable variations are used to explain the content of this utility model.

[0021] like Figures 1-3 As shown, a steel ingot heating furnace based on hydrogen-oxygen combustion technology includes a hydrogen-oxygen burner 1, an oxygen valve assembly 2, a hydrogen-rich fuel valve assembly 3, a furnace body, and a flue 4. The furnace body includes a furnace cover 6, furnace walls 7, and a furnace bottom 8. The furnace cover 6 is located at the top of the furnace wall 7, and the furnace bottom 8 is located at the bottom of the furnace wall 7. The hydrogen-oxygen burner 1 is located on the upper part of the furnace walls 7 on both sides of the furnace body, and the flue 4 is located on the lower part of the furnace walls 7 on both sides of the furnace body. The oxygen valve assembly 2 includes a main oxygen pipeline 21 and multiple sets of oxygen branch pipelines 2. 2. A valve assembly installed on the oxygen main line 21 and the oxygen branch line 22. The hydrogen-rich fuel valve assembly 3 includes a hydrogen-rich fuel main line 31 and multiple sets of hydrogen-rich fuel branch lines 32, and valve assemblies installed on the hydrogen-rich fuel main line 31 and the hydrogen-rich fuel branch lines 32. Each of the hydrogen-energy all-oxygen burners 1 is connected to a set of hydrogen-rich fuel branch lines 32 and a set of oxygen branch lines 22, and is connected to the hydrogen-rich fuel main line 31 and the oxygen main line 21 respectively through the hydrogen-rich fuel branch lines 32 and the oxygen branch lines 22.

[0022] The hydrogen-powered oxygen burner 1 is a flameless combustion burner.

[0023] Two hydrogen-powered oxygen burners 1 are provided on each side of the furnace wall 7, and are set at an angle of 30° to 45° with the furnace wall 7 in the horizontal direction. The hydrogen-powered oxygen burners on the two sides of the furnace wall 7 are arranged diagonally, that is, the tilting directions of the hydrogen-powered oxygen burners 1 on the two sides of the furnace wall 7 are opposite, so that the two angles are set diagonally with a front-to-back offset.

[0024] The flue 4 is located at the center of the bottom of the two furnace walls 7, with one flue 4 arranged on each of the two furnace walls 7.

[0025] The oxygen valve assembly 2 includes one main oxygen line 21 and four branch oxygen lines 22. The main oxygen line 21 is sequentially equipped with a first oxygen pressure sensor 201, an oxygen flame arrester 202, an oxygen filter 203, an oxygen pressure reducing valve 204, and a first oxygen pneumatic shut-off valve 205. The branch oxygen lines 22 are sequentially equipped with a second oxygen pneumatic shut-off valve 206, an oxygen flow sensor 207, an oxygen flow regulating valve 208, and a second oxygen pressure sensor 209.

[0026] The hydrogen-rich fuel valve assembly 3 includes one hydrogen-rich fuel main pipeline 31 and four hydrogen-rich fuel branch pipelines 32. The hydrogen-rich fuel main pipeline 31 is sequentially equipped with a first hydrogen-rich fuel pressure sensor 301, a hydrogen-rich fuel flame arrester 302, a hydrogen-rich fuel filter 303, a hydrogen-rich fuel pressure reducing valve 304, and a second hydrogen-rich fuel pneumatic shut-off valve 305. The hydrogen-rich fuel branch pipelines 32 are sequentially equipped with a second hydrogen-rich fuel pneumatic shut-off valve 306, a hydrogen-rich fuel flow sensor 307, a hydrogen-rich fuel flow regulating valve 308, and a second hydrogen-rich fuel pressure sensor 309.

[0027] Example 1: like Figure 1 , Figure 2 As shown, the furnace cover 6, furnace wall 7, furnace bottom 8, and flue 4 constitute the main structure of the steel ingot heating furnace. The hydrogen-powered oxygen burner 1 is a flameless combustion burner. The hydrogen-powered oxygen burner 1 is located on the upper part of both furnace walls 7, with two burners on each side, inclined at 45°, and arranged diagonally on both sides. The oxygen valve assembly 2 and the hydrogen-rich fuel valve assembly 3 are located outside the main structure of the steel ingot heating furnace. The oxygen valve assembly 2 is connected to the oxygen interface of the hydrogen-powered oxygen burner 1 via an oxygen branch pipe 22, and the hydrogen-rich fuel valve assembly 3 is connected to the hydrogen-rich fuel interface of the hydrogen-powered oxygen burner 1 via a hydrogen-rich fuel branch pipe 32. The furnace cover 6 is located at the top of the furnace wall 7, the furnace bottom 8 is located at the bottom of the furnace wall 7, and the flue 4 is located in the middle of the bottom of the furnace wall 7, with one flue 4 on each side of the furnace wall 7. When heating the steel ingot 5, the steel ingot 5 is placed at an angle along the furnace wall 7.

[0028] In this embodiment, the furnace cover 6 is a movable furnace cover 6. When steel ingots 5 need to be loaded or unloaded into the furnace, the furnace cover 6 is lifted by a crane mechanism. The contact area between the furnace cover 6 and the furnace wall 7 is sealed with a sand seal device to ensure the airtightness of the furnace. Two hydrogen-powered oxygen burners 1 are installed at an angle on each side of the furnace wall 7, using tangential swirling combustion. The high-temperature flue gas circulates in the furnace along the tangential pitch circle, fully agitating the atmosphere inside the furnace and improving the convective heat transfer effect. At the same time, the swirling flow generates a vortex effect, which can achieve flameless combustion and more uniform furnace temperature. The flue gas is discharged from the middle of both sides in a downward exhaust manner, and the flue gas runs through the entire furnace from top to bottom, achieving efficient heating and significant reduction in flue gas emissions. The steel ingots 5 are placed at an angle along the four sides of the furnace wall 7 to ensure the stability of the material.

[0029] like Figure 3 As shown, the oxygen valve assembly 2 includes one main oxygen line 21 and four branch oxygen lines 22. The main oxygen line 21 is sequentially equipped with a first oxygen pressure sensor 201, an oxygen flame arrester 202, an oxygen filter 203, an oxygen pressure reducing valve 204, and a first oxygen pneumatic shut-off valve 205. The branch oxygen lines 22 are sequentially equipped with a second oxygen pneumatic shut-off valve 206, an oxygen flow sensor 207, an oxygen flow regulating valve 208, and a second oxygen pressure sensor 209. The oxygen valve assembly 2 is connected to the oxygen interface of the hydrogen-powered oxygen burner 1 via the branch oxygen lines 22.

[0030] The hydrogen-rich fuel valve assembly 3 includes one main hydrogen-rich fuel line 31 and four branch hydrogen-rich fuel lines 32. The main hydrogen-rich fuel line 31 is sequentially equipped with a first hydrogen-rich fuel pressure sensor 301, a hydrogen-rich fuel flame arrester 302, a hydrogen-rich fuel filter 303, a hydrogen-rich fuel pressure reducing valve 304, and a first hydrogen-rich fuel pneumatic shut-off valve 305. The branch hydrogen-rich fuel lines 32 are sequentially equipped with a second hydrogen-rich fuel pneumatic shut-off valve 306, a hydrogen-rich fuel flow sensor 307, a hydrogen-rich fuel flow regulating valve 308, and a second hydrogen-rich fuel pressure sensor 309. The hydrogen-rich fuel valve assembly 3 is connected to the hydrogen-rich fuel interface of the hydrogen-powered oxygen burner 1 via the branch hydrogen-rich fuel lines 32.

[0031] The working principle of this embodiment: Oxygen enters the main oxygen pipeline 21 of oxygen valve group 2, passing sequentially through the first oxygen pressure sensor 201, oxygen flame arrester 202, oxygen filter 203, oxygen pressure reducing valve 204, and first oxygen pneumatic shut-off valve 205. The first oxygen pressure sensor 201 detects the oxygen pressure; when the detected value exceeds the system's set upper and lower limits, the first oxygen pneumatic shut-off valve 205 immediately shuts off the pressure, protecting oxygen valve group 2. The oxygen flame arrester 202 acts as a flame arrestor, and the oxygen filter 203 filters out solid impurities in the oxygen, preventing solid particles from rubbing against the oxygen pipeline steel ingot 5 and generating sparks that could cause a fire. The oxygen pressure reducing valve 204 adjusts the gas source pressure to the pressure required for combustion in the hydrogen-powered oxygen burner 1. The reduced-pressure oxygen then enters four oxygen branch pipelines 22, passing sequentially through the second oxygen pneumatic shut-off valve 206, oxygen flow sensor 207, oxygen flow regulating valve 208, and second oxygen pressure sensor 209. Oxygen flow sensor 207 detects oxygen flow in real time and adjusts the opening of oxygen flow regulating valve 208 by comparing it with the system set value. Second oxygen pressure sensor 209 detects oxygen pressure after depressurization. When the detected value exceeds the system set upper and lower limits, second oxygen pneumatic shut-off valve 206 immediately shuts off the pressure to ensure the safety and reliability of the combustion system.

[0032] Hydrogen-rich fuel enters the main hydrogen-rich fuel pipeline 31 of the hydrogen-rich fuel valve assembly 3, passing sequentially through the first hydrogen-rich fuel pressure sensor 301, the hydrogen-rich fuel flame arrester 302, the hydrogen-rich fuel filter 303, the hydrogen-rich fuel pressure reducing valve 304, and the first hydrogen-rich fuel pneumatic shut-off valve 305. The first hydrogen-rich fuel pressure sensor 301 detects the hydrogen-rich fuel pressure. When the detected value exceeds the system's set upper and lower limits, the first hydrogen-rich fuel pneumatic shut-off valve 305 immediately shuts off, protecting the hydrogen-rich fuel valve assembly 3. The hydrogen-rich fuel flame arrester 302 acts as a flame arrestor, and the hydrogen-rich fuel filter 303 filters out solid impurities in the hydrogen-rich fuel, preventing burner clogging. The hydrogen-rich fuel pressure reducing valve 304 adjusts the gas source pressure to the pressure required for combustion in the hydrogen-energy all-oxygen burner 1. The depressurized hydrogen-rich fuel enters four hydrogen-rich fuel branch lines 32, passing sequentially through a second hydrogen-rich fuel pneumatic shut-off valve 306, a hydrogen-rich fuel flow sensor 307, a hydrogen-rich fuel flow regulating valve 308, and a second hydrogen-rich fuel pressure sensor 309. The hydrogen-rich fuel flow sensor 307 monitors the hydrogen-rich fuel flow rate in real time and adjusts the opening of the hydrogen-rich fuel flow regulating valve 308 by comparing it with the system set value. The second hydrogen-rich fuel pressure sensor 309 monitors the pressure of the depressurized hydrogen-rich fuel. When the detected value exceeds the system's set upper and lower limits, the second hydrogen-rich fuel pneumatic shut-off valve 306 immediately shuts off the pressure, ensuring the safety and reliability of the combustion system.

[0033] Each hydrogen-powered oxygen burner 1 corresponds to one oxygen branch line 22 and one hydrogen-rich fuel branch line 32, and has an independent oxygen-fuel ratio control function to precisely control the hydrogen and oxygen of a single burner, thereby achieving precise flame control. At low and over-temperature conditions, the four hydrogen-powered oxygen burners 1 can automatically open and close. During heat preservation, some burners can be automatically closed to save energy and reduce production costs.

[0034] In summary, the steel ingot heating furnace based on hydrogen-oxygen combustion technology provided by this utility model can effectively improve the social, environmental, and economic benefits of the heating furnace process in terms of production, safety, environmental protection, energy saving, and cost reduction. The related technologies of this utility model will also promote green and low-carbon development in the industrial sector and help the steel industry achieve carbon peaking, empowering deep decarbonization throughout the entire steel manufacturing process.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A steel ingot heating furnace based on hydrogen-oxygen combustion technology, characterized in that, The system includes a hydrogen-powered oxygen burner, an oxygen valve assembly, a hydrogen-rich fuel valve assembly, a furnace body, and a flue. The hydrogen-powered oxygen burner is located on the upper part of the furnace walls on both sides of the furnace body, and the flue is located on the lower part of the furnace walls on both sides of the furnace body. The oxygen valve assembly includes a main oxygen pipeline and multiple sets of oxygen branch pipelines, as well as valve assemblies installed on the main oxygen pipeline and oxygen branch pipelines. The hydrogen-rich fuel valve assembly includes a main hydrogen-rich fuel pipeline and multiple sets of hydrogen-rich fuel branch pipelines, as well as valve assemblies installed on the main hydrogen-rich fuel pipeline and hydrogen-rich fuel branch pipelines. Each hydrogen-powered oxygen burner is connected to one set of hydrogen-rich fuel branch pipelines and one set of oxygen branch pipelines, and is connected to the main hydrogen-rich fuel pipeline and the main oxygen pipeline respectively through the hydrogen-rich fuel branch pipelines and the oxygen branch pipelines.

2. The steel ingot heating furnace based on hydrogen-oxygen combustion technology according to claim 1, characterized in that, The hydrogen-powered oxygen burner is a flameless combustion burner.

3. A steel ingot heating furnace based on hydrogen-oxygen combustion technology according to claim 1, characterized in that, Two hydrogen-powered oxygen burners are installed on each side of the furnace wall, and are set at an angle of 30° to 45° with the furnace wall in the horizontal direction. The hydrogen-powered oxygen burners on both sides of the furnace wall are arranged diagonally.

4. A steel ingot heating furnace based on hydrogen-oxygen combustion technology according to claim 1, characterized in that, The flue is located at the center of the bottom of the two furnace walls, with one flue on each side of the furnace wall.

5. A steel ingot heating furnace based on hydrogen-oxygen combustion technology according to claim 1, characterized in that, The oxygen valve assembly includes one main oxygen line and four branch oxygen lines. The main oxygen line is provided with a first oxygen pressure sensor, an oxygen flame arrester, an oxygen filter, an oxygen pressure reducing valve, and a first oxygen pneumatic shut-off valve in sequence. The branch oxygen lines are provided with a second oxygen pneumatic shut-off valve, an oxygen flow sensor, an oxygen flow regulating valve, and a second oxygen pressure sensor in sequence.

6. A steel ingot heating furnace based on hydrogen-oxygen combustion technology according to claim 1, characterized in that, The hydrogen-rich fuel valve assembly includes one main hydrogen-rich fuel pipeline and four branch hydrogen-rich fuel pipelines. The main hydrogen-rich fuel pipeline is sequentially equipped with a first hydrogen-rich fuel pressure sensor, a hydrogen-rich fuel flame arrester, a hydrogen-rich fuel filter, a hydrogen-rich fuel pressure reducing valve, and a second hydrogen-rich fuel pneumatic shut-off valve. The branch hydrogen-rich fuel pipelines are sequentially equipped with a second hydrogen-rich fuel pneumatic shut-off valve, a hydrogen-rich fuel flow sensor, a hydrogen-rich fuel flow regulating valve, and a second hydrogen-rich fuel pressure sensor.

7. A steel ingot heating furnace based on hydrogen-oxygen combustion technology according to claim 1, characterized in that, The furnace body includes a furnace cover, a furnace wall, and a furnace bottom. The furnace cover is located at the top of the furnace wall, and the furnace bottom is located at the bottom of the furnace wall.

Images