A large-scale methanol steam reforming hydrogen production system for hydrogen-based direct reduction ironmaking

Abstract

The present invention discloses a large-scale methanol-to-hydrogen system for hydrogen production in ironmaking, which includes a methanol-water tank, a high-pressure pump, a first heater, a second heater, a third heater, a fourth heater, a shell-and-tube reactor, a hydrogen separation and purification device, and a hydrogen buffer tank; the shell-and-tube reactor is provided with a heating steam inlet, a heating steam outlet, a methanol-water inlet, and a mixed gas outlet, and the methanol-water tank, the high-pressure pump, the first heater, the second heater, the third heater, and the methanol-water inlet of the shell-and-tube reactor are sequentially connected through pipelines, and the mixed gas outlet of the shell-and-tube reactor, the fourth heater, and the hydrogen separation and purification device are sequentially connected through pipelines, and the hydrogen separation and purification device is connected to the first heater through a first hydrogen pipeline. The large-scale methanol-to-hydrogen system for hydrogen production in ironmaking of the present invention is convenient to use, prepares hydrogen through the shell-and-tube reactor, and stores pure hydrogen in the hydrogen buffer tank through the hydrogen separation and purification device, realizing the acquisition of pure hydrogen.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production from methanol, and particularly relates to a large-scale methanol hydrogen production system for iron production using hydrogen. Background Art

[0002] Currently, the commonly used method for iron production is to directly reduce iron ore using a "hydrogen-based shaft furnace". However, it is difficult to obtain pure hydrogen, and a large amount of CO2 is generated during the hydrogen production process, exacerbating the greenhouse effect.

[0003] Based on the above situation, the present invention proposes a large-scale methanol hydrogen production system for iron production using hydrogen, which can effectively solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a large-scale methanol hydrogen production system for iron production using hydrogen. The large-scale methanol hydrogen production system for iron production using hydrogen of the present invention is convenient to use. Hydrogen is prepared through a shell-and-tube reactor, and pure hydrogen is stored in a hydrogen buffer tank through a hydrogen separation and purification device, realizing the acquisition of pure hydrogen.

[0005] The present invention is realized by the following technical solutions:

[0006] A large-scale methanol hydrogen production system for iron production using hydrogen includes a methanol-water tank, a high-pressure pump, a first heater, a second heater, a third heater, a fourth heater, a shell-and-tube reactor, a hydrogen separation and purification device, and a hydrogen buffer tank;

[0007] The shell-and-tube reactor is provided with a heating steam inlet, a heating steam outlet, a methanol-water inlet, and a mixed gas outlet. The methanol-water tank, the high-pressure pump, the first heater, the second heater, the third heater, and the methanol-water inlet of the shell-and-tube reactor are sequentially connected through pipelines. The mixed gas outlet of the shell-and-tube reactor, the fourth heater, and the hydrogen separation and purification device are sequentially connected through pipelines. The hydrogen separation and purification device is connected to the first heater through a first hydrogen pipeline, the first heater is connected to the hydrogen buffer tank through a second hydrogen pipeline. A steam inlet pipe is connected to the heating steam inlet of the shell-and-tube reactor, and a steam outlet pipe is connected to the heating steam outlet of the shell-and-tube reactor. The fourth heater is connected to the steam outlet pipe through a heater outlet pipe, and the fourth heater is connected to the steam inlet pipe through a heater inlet pipe.

[0008] The object of the present invention is to provide a large-scale methanol hydrogen production system for iron production using hydrogen. The large-scale methanol hydrogen production system for iron production using hydrogen of the present invention is convenient to use. Hydrogen is prepared through a shell-and-tube reactor, and pure hydrogen is stored in a hydrogen buffer tank through a hydrogen separation and purification device, realizing the acquisition of pure hydrogen.

[0009] Preferably, the hydrogen separation and purification device is connected to the third heater through the first mixing gas pipe, the third heater is connected to the second heater through the second mixing gas pipe, and the second heater is connected to the first CO2 storage tank through the third mixing gas pipe.

[0010] Preferably, the hydrogen separation and purification device is connected to the third heater through the fourth mixing gas pipe, the third heater is connected to the second heater through the fifth mixing gas pipe, the second heater is connected to the condensation device through the sixth mixing gas pipe, the condensation device is connected to the lower part of the condensation rectification column through the seventh mixing gas pipe, the bottom of the condensation rectification column is connected to the first CO2 storage tank through the first CO2 pipe, the upper part of the condensation rectification column is connected to the second CO2 storage tank through the second CO2 pipe, and the top of the condensation rectification column is connected to the fourth heater through the eighth mixing gas pipe.

[0011] Preferably, the hydrogen separation and purification device includes three groups of hydrogen separation and purification components.

[0012] Preferably, the number of hydrogen separation and purification devices in each group of hydrogen separation and purification components is 3.

[0013] Preferably, solenoid valves are provided on the heater inlet pipe, heater outlet pipe, steam inlet pipe and steam outlet pipe.

[0014] Preferably, a booster pump is provided on the first CO2 pipe.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] The large-scale methanol hydrogen production system for hydrogen production of iron of the present invention is convenient to use. Hydrogen is prepared through a shell and tube reactor, and pure hydrogen is stored in a hydrogen buffer tank through a hydrogen separation and purification device, realizing the acquisition of pure hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the second embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation of the present invention will be described below in conjunction with specific embodiments. However, it should be understood that the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent; to better illustrate this embodiment, some components in the drawings will be omitted, enlarged or reduced, which do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent.

[0020] Example 1:

[0021] As Figures 1 to 2 shown, the present invention provides a large-scale methanol steam reforming system for hydrogen production for ironmaking, which includes a methanol-water tank 1, a high-pressure pump 2, a first heater 3, a second heater 4, a third heater 5, a fourth heater 6, a shell-and-tube reactor 7, a hydrogen separation and purification device 8, and a hydrogen buffer tank 9;

[0022] The shell-and-tube reactor 7 is provided with a heating steam inlet, a heating steam outlet, a methanol-water inlet, and a mixed gas outlet. The methanol-water tank 1, the high-pressure pump 2, the first heater 3, the second heater 4, the third heater 5, and the methanol-water inlet of the shell-and-tube reactor 7 are connected in sequence through pipelines. The mixed gas outlet of the shell-and-tube reactor 7, the fourth heater 6, and the hydrogen separation and purification device 8 are connected in sequence through pipelines. The hydrogen separation and purification device 8 is connected to the first heater 3 through a first hydrogen pipe 10. The first heater 3 is connected to the hydrogen buffer tank 9 through a second hydrogen pipe 11. A steam inlet pipe 13 is connected to the heating steam inlet of the shell-and-tube reactor 7. A steam outlet pipe 12 is connected to the heating steam outlet of the shell-and-tube reactor 7. The fourth heater 6 is connected to the steam outlet pipe 12 through a heater outlet pipe 14. The fourth heater 6 is connected to the steam inlet pipe 13 through a heater inlet pipe 15.

[0023] The shell-and-tube reactor 7 is filled with a catalyst, and the catalyst reacts with methanol-water to produce a mixed gas.

[0024] Example 2:

[0025] As Figure 1 shown, the present invention provides a large-scale methanol steam reforming system for hydrogen production for ironmaking, which includes a methanol-water tank 1, a high-pressure pump 2, a first heater 3, a second heater 4, a third heater 5, a fourth heater 6, a shell-and-tube reactor 7, a hydrogen separation and purification device 8, and a hydrogen buffer tank 9;

[0026] The tubular reactor 7 is provided with a heating steam inlet, a heating steam outlet, a methanol-water inlet, and a mixed gas outlet. The methanol-water tank 1, the high-pressure pump 2, the first heater 3, the second heater 4, the third heater 5, and the methanol-water inlet of the tubular reactor 7 are sequentially connected through pipelines. The mixed gas outlet of the tubular reactor 7, the fourth heater 6, and the hydrogen separation and purification device 8 are sequentially connected through pipelines. The hydrogen separation and purification device 8 is connected to the first heater 3 through the first hydrogen pipeline 10. The first heater 3 is connected to the hydrogen buffer tank 9 through the second hydrogen pipeline 11. The heating steam inlet of the tubular reactor 7 is connected with a steam inlet pipe 13, and the heating steam outlet of the tubular reactor 7 is connected with a steam outlet pipe 12. The fourth heater 6 is connected to the steam outlet pipe 12 through a heater outlet pipe 14, and the fourth heater 6 is connected to the steam inlet pipe 13 through a heater inlet pipe 15.

[0027] Further, in another embodiment, the hydrogen separation and purification device 8 is connected to the third heater 5 through a first mixing gas pipeline 16. The third heater 5 is connected to the second heater 4 through a second mixing gas pipeline 17. The second heater 4 is connected to the first CO2 storage tank 23 through a third mixing gas pipeline 18.

[0028] The CO2 discharged from the hydrogen separation and purification device 8 is heated by the third heater 5 and the second heater 4 in sequence and then transported to the first CO2 storage tank 23 for storage, which can recycle CO2 and avoid environmental pollution caused by discharging CO2 into the atmosphere.

[0029] Further, in another embodiment, the hydrogen separation and purification device 8 includes three groups of hydrogen separation and purification components.

[0030] Further, in another embodiment, the number of hydrogen separation and purification devices in each group of the hydrogen separation and purification components is 3.

[0031] Setting three groups of hydrogen separation and purification components improves the efficiency of hydrogen separation and purification, thereby increasing the hydrogen production.

[0032] Further, in another embodiment, electromagnetic valves 31 are provided on the heater inlet pipe 15, the heater outlet pipe 14, the steam inlet pipe 13, and the steam outlet pipe 12.

[0033] Setting the electromagnetic valve 31 can control the on-off of the heating steam.

[0034] Example 3:

[0035] As Figure 2As shown in the figure, the present invention provides a large-scale methanol-to-hydrogen system for hydrogen production in ironmaking, which includes a methanol-water tank 1, a high-pressure pump 2, a first heater 3, a second heater 4, a third heater 5, a fourth heater 6, a shell-and-tube reactor 7, a hydrogen separation and purification device 8, and a hydrogen buffer tank 9;

[0036] The shell-and-tube reactor 7 is provided with a heating steam inlet, a heating steam outlet, a methanol-water inlet, and a mixed gas outlet. The methanol-water tank 1, the high-pressure pump 2, the first heater 3, the second heater 4, the third heater 5, and the methanol-water inlet of the shell-and-tube reactor 7 are sequentially connected through pipelines. The mixed gas outlet of the shell-and-tube reactor 7, the fourth heater 6, and the hydrogen separation and purification device 8 are sequentially connected through pipelines. The hydrogen separation and purification device 8 is connected to the first heater 3 through a first hydrogen pipe 10. The first heater 3 is connected to the hydrogen buffer tank 9 through a second hydrogen pipe 11. A steam inlet pipe 13 is connected to the heating steam inlet of the shell-and-tube reactor 7, and a steam outlet pipe 12 is connected to the heating steam outlet of the shell-and-tube reactor 7. The fourth heater 6 is connected to the steam outlet pipe 12 through a heater outlet pipe 14, and the fourth heater 6 is connected to the steam inlet pipe 13 through a heater inlet pipe 15.

[0037] Further, in another embodiment, the hydrogen separation and purification device 8 is connected to the third heater 5 through a fourth mixing gas pipe 24. The third heater 5 is connected to the second heater 4 through a fifth mixing gas pipe 25. The second heater 4 is connected to the condensation device 19 through a sixth mixing gas pipe 26. The condensation device 19 is connected to the lower part of the condensation rectification tower 21 through a seventh mixing gas pipe 27. The bottom of the condensation rectification tower 21 is connected to the first CO2 storage tank 23 through a first CO2 pipe 22. The upper part of the condensation rectification tower 21 is connected to the second CO2 storage tank 29 through a second CO2 pipe 28. The top of the condensation rectification tower 21 is connected to the fourth heater 6 through an eighth mixing gas pipe 30.

[0038] The CO2 discharged from the hydrogen separation and purification device 8 is heated by the third heater 5 and the second heater 4 in sequence, and then transported to the condensation device 19 for condensation. After the CO2 is liquefied, it enters the condensation rectification tower 21, and the pure CO2 is extracted and stored in the first CO2 storage tank 23 and the second CO2 storage tank 29 respectively. The excess mixed gas enters the fourth heater 6 from the top of the condensation rectification tower 21 for heating, and further hydrogen purification is carried out, so that the "escaped" hydrogen can be recovered to the maximum extent, increasing the hydrogen production rate.

[0039] Further, in another embodiment, the hydrogen separation and purification device 8 includes three groups of hydrogen separation and purification components.

[0040] Further, in another embodiment, the number of hydrogen separation and purification devices in each group of hydrogen separation and purification components is three.

[0041] Further, in another embodiment, solenoid valves 31 are provided on the heater inlet pipe 15, heater outlet pipe 14, steam inlet pipe 13, and steam outlet pipe 12.

[0042] Further, in another embodiment, a booster pump 32 is provided on the first CO2 pipe 22.

[0043] The working principle of an embodiment of the present invention is as follows:

[0044] A large-scale methanol-to-hydrogen system for hydrogen production in ironmaking. The methanol water in the methanol water tank 1 is transported to the first heater 3 by the high-pressure pump 2. After being sequentially heated by the first heater 3, second heater 4, and third heater 5, it is transported to the shell-and-tube reactor 7 to react with the catalyst to produce a mixed gas. The mixed gas is transported to the fourth heater 6 and heated to 400 - 450 °C, and then enters the hydrogen separation and purification device 8 for hydrogen purification. The hydrogen produced by the hydrogen separation and purification device 8 is transported to the first heater 3 for heating, and after heating, it is sent to the hydrogen buffer tank 9 for storage;

[0045] Among them, there is still a part of hydrogen in the mixed gas produced by the hydrogen separation and purification device 8. The mixed gas will be reheated by the fourth heater 6 and then enter the hydrogen separation and purification device 8 for purification to increase the hydrogen production rate.

[0046] Based on the description and drawings of the present invention, those skilled in the art can easily manufacture or use the large-scale methanol-to-hydrogen system for hydrogen production in ironmaking of the present invention, and can achieve the positive effects recorded in the present invention.

[0047] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood by combining the drawings and according to the specific circumstances.

[0048] Unless otherwise clearly defined and limited, in the present invention, if there are terms such as "arranged", "connected" and "coupled", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A large-scale methanol steam reforming hydrogen production system for hydrogen-based ironmaking, characterized in that: It includes a methanol-water tank, a high-pressure pump, a first heater, a second heater, a third heater, a fourth heater, a shell-and-tube reactor, a hydrogen separation and purification device, and a hydrogen buffer tank; The shell-and-tube reactor is provided with a heating steam inlet, a heating steam outlet, a methanol-water inlet, and a mixed gas outlet. The methanol-water tank, the high-pressure pump, the first heater, the second heater, the third heater, and the methanol-water inlet of the shell-and-tube reactor are sequentially connected through pipelines. The mixed gas outlet of the shell-and-tube reactor, the fourth heater, and the hydrogen separation and purification device are sequentially connected through pipelines. The hydrogen separation and purification device is connected to the first heater through a first hydrogen pipe, and the first heater is connected to the hydrogen buffer tank through a second hydrogen pipe. A steam inlet pipe is connected to the heating steam inlet of the shell-and-tube reactor, and a steam outlet pipe is connected to the heating steam outlet of the shell-and-tube reactor. The fourth heater is connected to the steam outlet pipe through a heater outlet pipe, and the fourth heater is connected to the steam inlet pipe through a heater inlet pipe; The hydrogen separation and purification device is connected to the third heater through a fourth mixing gas pipe. The third heater is connected to the second heater through a fifth mixing gas pipe. The second heater is connected to a condensation device through a sixth mixing gas pipe. The condensation device is connected to the lower part of a condensation rectification tower through a seventh mixing gas pipe. The bottom of the condensation rectification tower is connected to a first CO2 storage tank through a first CO2 pipe. The upper part of the condensation rectification tower is connected to a second CO2 storage tank through a second CO2 pipe. The top of the condensation rectification tower is connected to the fourth heater through an eighth mixing gas pipe; Or the hydrogen separation and purification device is connected to the third heater through a first mixing gas pipe. The third heater is connected to the second heater through a second mixing gas pipe. The second heater is connected to the first CO2 storage tank through a third mixing gas pipe.

2. The large-scale methanol steam reforming hydrogen production system for hydrogen-based ironmaking according to claim 1, characterized in that: The hydrogen separation and purification device includes three groups of hydrogen separation and purification components.

3. The large-scale methanol reforming hydrogen production system for hydrogen-based ironmaking according to claim 2, characterized in that: The number of hydrogen separation and purifiers in each group of hydrogen separation and purification components is 3.

4. The large-scale methanol hydrogen production system for hydrogen production in ironmaking according to claim 1, characterized in that: Solenoid valves are provided on the heater inlet pipe, the heater outlet pipe, the steam inlet pipe, and the steam outlet pipe.

5. The large-scale methanol steam reforming hydrogen production system for hydrogen-making direct reduced iron according to claim 1, wherein: A booster pump is provided on the first CO2 pipe.

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