A solar heating system for hydrogen-rich reducing gas

Abstract

The utility model discloses a kind of hydrogen-rich reducing gas solar heating systems, including condensing device, heat absorption device, heat exchanger and hydrogen-rich reduction system;The heat absorption device is located at the focal point of condensing device, inside is equipped with spiral duct;The heat exchanger inside is equipped with spiral duct;The outlet of the spiral duct in the heat absorption device is communicated with the import of the spiral duct in the heat exchanger;The hydrogen-rich reducing gas supply source is communicated with the import of the spiral duct in the heat absorption device by hydrogen-rich reducing gas pipeline, the outlet of the spiral duct in the heat exchanger is communicated with the reducing gas import of hydrogen-rich reduction system by high-temperature reducing gas pipeline.This solar heating system can heat hydrogen-rich reducing gas to 950 DEG C or above, while no carbon dioxide emission is generated throughout, meet the demand of metallurgical process to high-temperature reducing gas, while realizing environmental protection and energy-saving goal.

Description

Technical Field

[0001] This utility model relates to a heating system, and more particularly to a solar heating system for hydrogen-rich reducing gas. Background Technology

[0002] In modern metallurgical industry, high-temperature heating of hydrogen-rich reducing gas is a crucial step in achieving efficient reduction reactions. Traditional heating methods typically rely on the combustion of fossil fuels, which is not only energy-intensive but also generates substantial carbon dioxide emissions, severely impacting the environment. With the urgent global demand for low-carbon technologies, developing an efficient, environmentally friendly, and carbon dioxide-free heating technology has become an important task for the industry.

[0003] Existing hydrogen-rich reducing gas heating technologies mainly employ electric heating or fossil fuel combustion heating, but these methods have significant limitations. For example, while electric heating is clean, it is energy-intensive and expensive; and fossil fuel combustion produces large amounts of carbon dioxide, which does not meet environmental protection requirements. Therefore, developing a heating technology that utilizes renewable energy is of significant practical importance.

[0004] Solar energy, as a clean and renewable energy source, has enormous application potential. In recent years, solar thermal utilization technology has been widely applied in many fields, but its application in heating hydrogen-rich reducing gas is still in its early stages. Currently, there is no mature technical solution for solar heating of hydrogen-rich reducing gas that can achieve efficient heating with zero carbon dioxide emissions throughout the entire process. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an environmentally friendly and effective solar heating system for hydrogen-rich reducing gas.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: it includes a concentrating device, a heat-absorbing device, a heat exchanger, and a hydrogen-rich reduction system; the heat-absorbing device is located at the focal point of the concentrating device and has a spiral pipe inside; the heat exchanger has a spiral pipe inside; the outlet of the spiral pipe inside the heat-absorbing device is connected to the inlet of the spiral pipe inside the heat exchanger; the hydrogen-rich reducing gas supply source is connected to the inlet of the spiral pipe inside the heat-absorbing device through a hydrogen-rich reducing gas pipeline, and the outlet of the spiral pipe inside the heat exchanger is connected to the reducing gas inlet of the hydrogen-rich reduction system through a high-temperature reducing gas pipeline.

[0007] Furthermore, the hydrogen-rich reducing gas pipeline is equipped with a shut-off valve, pressure gauge #1, pressure regulating valve, pressure gauge #2, flow regulating valve, flow meter, and check valve in sequence along the reducing gas flow direction.

[0008] Furthermore, the high-temperature reducing gas pipeline is equipped with a thermometer and a high-temperature pneumatic shut-off valve in sequence along the reducing gas flow direction.

[0009] Furthermore, a heat storage device is also provided; the heat storage device is connected to a heat exchanger.

[0010] The beneficial effects of adopting the above technical solution are as follows: This utility model can heat hydrogen-rich reducing gas to above 950°C without producing carbon dioxide emissions throughout the process, thus meeting the metallurgical process's demand for high-temperature reducing gas and achieving environmental protection and energy-saving goals.

[0011] This invention is environmentally friendly, utilizing solar energy as the heat source throughout the process, producing no carbon dioxide emissions and achieving zero carbon emissions, thus meeting low-carbon and environmental protection requirements. It is also highly efficient, employing a two-stage heating system (heat absorber + heat exchanger) to heat hydrogen-rich reducing gas to over 950℃, meeting the high-temperature reducing gas requirements of metallurgical processes. Furthermore, it is economical, as solar energy is a free and renewable energy source with low operating costs. Finally, it is stable, as the addition of a thermal storage system allows for 24-hour uninterrupted operation, unaffected by fluctuations in solar energy levels. This invention achieves highly efficient utilization of solar energy and continuous, stable energy supply, fully meeting the high-temperature reducing gas requirements of metallurgical processes while simultaneously achieving zero carbon emissions. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the heat exchanger described in this utility model.

[0014] In the diagram: 1. Concentrating device; 2. Heat absorption device; 3. Heat exchanger; 4. Heat storage device; 5. Hydrogen-rich reduction system; 6. High-temperature pneumatic shut-off valve; 7. Thermometer; 8. Check valve; 9. Flow regulating valve; 10. Pressure gauge #2; 11. Pressure gauge #1; 12. Shut-off valve; 13. Pressure regulating valve; 14. Flow meter; 31. Spiral pipe; 32. Heat exchange chamber. Detailed Implementation

[0015] Figure 1 , 2 As shown, the solar heating system for hydrogen-rich reducing gas consists of a concentrator 1, a heat absorber 2, a heat exchanger 3, a heat storage device 4, and a hydrogen-rich reducing system 5. It is equipped with a high-temperature pneumatic shut-off valve 6, a thermometer 7, a check valve 8, a flow regulating valve 9, a pressure gauge, a shut-off valve 12, a pressure regulating valve 13, and a flow meter 14 as control elements.

[0016] The focusing device 1 uses a parabolic reflector or a butterfly focusing mirror with a focal length of 5 meters and an area of ​​100 square meters to focus sunlight onto the heat-absorbing device 2.

[0017] The heat-absorbing device 2 is located at the focal point of the concentrator and is made of high-temperature ceramic material. It directly receives and absorbs high-density solar radiation. The concentrator 1 focuses sunlight onto the heat-absorbing device 2, making its surface temperature reach 1000-1500℃. The heat-absorbing device 2 has a spiral pipe inside, through which hydrogen-rich reducing gas flows and directly absorbs solar heat. The hydrogen-rich reducing gas is heated to 600-800℃.

[0018] The heat exchanger 3 has a heat exchange chamber 32 inside its shell. It employs a dual-medium heat exchange design: one medium flows within the shell of the heat absorber 2 and the heat exchanger 3, while the other flows within the heat exchange chamber 32 and the heat storage device 4. The heat exchange medium can be high-temperature molten salt. A spiral pipe 31 is nested within the heat exchange chamber 32 to ensure efficient heat exchange. The outlet of the spiral pipe in the heat absorber 2 is connected to the inlet of the spiral pipe 31 in the heat exchanger 3. The hydrogen-rich reducing gas, after initial heating in the heat absorber 2, flows into the spiral pipe of the heat exchanger 3, where it is further heated to over 950°C. When solar energy is abundant, the heat exchange medium from the heat absorber 2 heats both the hydrogen-rich reducing gas and the heat exchange medium from the heat storage device 4 within the heat exchanger 3 shell. When solar energy is insufficient, the heat exchange medium from the heat storage device 4 heats the hydrogen-rich reducing gas.

[0019] The heat storage device 4 uses high-temperature molten salt as the heat exchange medium, with a capacity of 1000 kWh. This allows the system to operate continuously for 8-10 hours without sunlight, storing excess heat to ensure continuous energy supply at night or on cloudy days. The heat exchange medium circulates between the heat storage device 4 and the heat exchanger 3 via a pumping system. When solar energy is abundant, some of the heat is used by the heat exchanger 3 to heat the molten salt and store it.

[0020] The hydrogen-rich reduction system 5 receives high-temperature reducing gas for metallurgical reduction reactions.

[0021] Connection relationships: Concentrating device 1 focuses sunlight onto heat-absorbing device 2.

[0022] The hydrogen-rich reducing gas flows sequentially through the heat absorption device 2 → heat exchanger 3 → hydrogen-rich reduction system 5.

[0023] The heat storage device 4 is connected in parallel with the heat exchanger 3, and the heat storage or release is controlled by a valve.

[0024] Medium flow path: Gas path: Hydrogen-rich reducing gas → heat absorption device spiral pipe → heat exchanger spiral pipe → hydrogen-rich reduction system; Molten salt path: thermal storage device → heat exchanger cavity → return to thermal storage device (circulation).

[0025] Key temperature distribution: At the focal point of the heat absorption device: 1000~1500℃ (highest temperature zone); Heat exchanger outlet: above 950℃ (due to the added heat stored in molten salt); Thermal storage molten salt temperature: 550~800℃ (operating temperature range).

[0026] Instruments and control valves: The hydrogen-rich reducing gas pipeline is equipped with a shut-off valve 12, pressure gauge 11 (No. 1), pressure regulating valve 13, pressure gauge 10 (No. 2), flow regulating valve 9, flow meter 14, and check valve 8 in sequence along the reducing gas flow direction; the high-temperature reducing gas pipeline is equipped with a thermometer 7 and a high-temperature pneumatic shut-off valve 6 in sequence along the reducing gas flow direction. The thermometer 7 monitors the outlet gas temperature in real time, the high-temperature pneumatic shut-off valve 6 provides over-temperature protection, and the flow regulating valve 9 precisely controls the gas flow rate.

[0027] Figure 1 , 2 As shown, the working process of this hydrogen-rich reducing gas solar heating system is as follows: Solar concentrating stage: Concentrating device 1 tracks the sun and focuses the reflected light onto heat-absorbing device 2.

[0028] Hydrogen-rich reducing gas heating stage: The hydrogen-rich reducing gas enters the heat absorption device 2 from the inlet and absorbs solar heat in the spiral pipe 31, and is initially heated to 600-800℃. After initial heating, the gas enters the heat exchanger 3 and undergoes secondary heat exchange with the high-temperature molten salt in the heat storage device 4, raising the temperature to above 950℃.

[0029] Thermal storage and heat regulation stage: When solar energy is abundant, excess heat is stored in thermal storage device 4 through heat exchanger 3. When sunlight is insufficient, thermal storage device 4 releases heat to heat exchanger 3 to maintain continuous system operation.

[0030] High-temperature gas output stage: The heated hydrogen-rich reducing gas enters the hydrogen-rich reduction system 5 through the high-temperature pneumatic shut-off valve 6.

[0031] Control Logic and Valve Management: Temperature control: The thermometer 7 monitors the gas temperature and maintains the target temperature of 950℃ by adjusting the angle of the concentrator and the flow regulating valve 9.

[0032] Pressure control: Pressure gauge 11 monitors the pressure of the heat absorption device, pressure gauge 20 monitors the pressure of the heat exchanger, and pressure regulating valve 13 ensures stable system pressure.

[0033] Safety controls: The high-temperature pneumatic shut-off valve 6 automatically cuts off the gas flow when the temperature or pressure exceeds the limit. The check valve 8 prevents gas backflow.

[0034] Flow control: The flow meter 14 is linked with the flow regulating valve 9 to optimize the gas flow rate.

Claims

1. A solar heating system for hydrogen-rich reducing gas, characterized by: The system includes a concentrating device (1), a heat-absorbing device (2), a heat exchanger (3), and a hydrogen-rich reduction system (5). The heat-absorbing device (2) is located at the focal point of the concentrating device and has a spiral pipe inside. The heat exchanger (3) has a spiral pipe (31) inside. The outlet of the spiral pipe inside the heat-absorbing device (2) is connected to the inlet of the spiral pipe (31) inside the heat exchanger (3). The hydrogen-rich reducing gas supply source is connected to the inlet of the spiral pipe inside the heat-absorbing device (2) through a hydrogen-rich reducing gas pipeline. The outlet of the spiral pipe (31) inside the heat exchanger (3) is connected to the reducing gas inlet of the hydrogen-rich reduction system (5) through a high-temperature reducing gas pipeline.

2. A solar heating system for hydrogen-rich reducing gas according to claim 1, characterized in that: The hydrogen-rich reducing gas pipeline is equipped with a shut-off valve (12), pressure gauge 1 (11), pressure regulating valve (13), pressure gauge 2 (10), flow regulating valve (9), flow meter (14) and check valve (8) in sequence along the reducing gas flow direction.

3. A solar heating system for hydrogen-rich reducing gas according to claim 1, characterized in that: The high-temperature reducing gas pipeline is equipped with a thermometer (7) and a high-temperature pneumatic shut-off valve (6) in sequence along the reducing gas flow direction.

4. A solar heating system of hydrogen-rich reducing gas according to claim 1, 2 or 3, characterized in that: It is also equipped with a heat storage device (4); the heat storage device (4) is connected to a heat exchanger (3).

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