Methanol catalytic reforming integrated reaction unit

Abstract

The utility model relates to the technical field of hydrogen preparation devices, and specifically to an integrated methanol catalytic reforming reaction device, comprising a shell, wherein a reaction chamber is arranged on the upper part of the shell, a combustion chamber is arranged on the lower part, a circulation pipeline for circulating a heating medium is arranged between the reaction chamber and the combustion chamber; a heating tube array for providing heat to the heating medium is arranged in the combustion chamber, a fuel delivery module connected to a feed end of the heating tube array is arranged on the outside of the shell, the overall structure is compact, and no open flame heating is required during use, thereby improving production safety.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen preparation devices, and in particular to an integrated methanol catalytic reforming integrated reaction device for hydrogen preparation. Background Art

[0002] Hydrogen energy is regarded as a clean energy with great development potential in the 21st century. Hydrogen is not only an industrial raw material, but also an important secondary energy to support the future clean energy transformation. Compared with coal and natural gas, methanol has excess production capacity, abundant raw material resources, and is easy to store and transport. Methanol reforming to produce hydrogen has been rapidly promoted in recent years.

[0003] Since the traditional methanol steam hydrogen production reactor device uses electrically heated thermal oil or natural gas combustion to heat the thermal oil as a heat source, it has the disadvantages of high energy consumption, open flames, and a large footprint. Especially for skid-mounted methanol reforming hydrogen production equipment, it is particularly important to use a safe, energy-saving, integrated catalytic reforming reactor (including heating system) device.

[0004] To solve the above bottleneck problems, methanol catalytic flameless combustion is used to avoid open flames and has high safety. At the same time, the combustion exhaust gas and PSA separation exhaust gas are preheated and burned, which has a significant energy-saving effect. The catalytic combustion and catalytic reforming reactions are integrated into an overall equipment, which has the significant advantage of high integration. Utility Model Content

[0005] In order to solve the above problems, the embodiment of the utility model provides a highly integrated methanol catalytic reforming integrated reaction device with a small footprint.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: a methanol catalytic reforming integrated reaction device, comprising a shell, a reaction chamber is arranged on the upper part of the shell, a combustion chamber is arranged on the lower part of the shell, a circulation pipeline for circulating a heating medium is arranged between the reaction chamber and the combustion chamber; a heating tube array for providing heat to the heating medium is arranged in the combustion chamber, and a fuel delivery module connected to the feed end of the heating tube array is arranged on the outside of the shell.

[0007] As a further improvement of the above technical solution:

[0008] The fuel delivery module comprises a fuel delivery pipeline and an air delivery pipeline. A methanol vaporizer is arranged on the fuel delivery pipeline, and a heat exchanger 1 is arranged at the air inlet end of the air delivery pipeline.

[0009] A high-temperature flue gas recovery pipeline is provided at the output end of the heating tube array, and the ends of the high-temperature flue gas recovery pipeline are respectively connected to the methanol vaporizer and the heat exchanger.

[0010] The fuel delivery pipeline is provided with an induced draft fan 1, the air delivery pipeline is provided with an induced draft fan 2, and the feed end of the heating tube array is provided with an oxygen meter.

[0011] The reaction chamber is provided with a reaction tube for introducing a methanol-water vapor mixed gas, the reaction tube is provided with a filler, and the discharge end of the reaction tube is provided with a hydrogen separation device.

[0012] The discharge end of the hydrogen separation device is provided with a tail gas recovery pipeline which is in communication with the fuel delivery module.

[0013] The beneficial effects of the embodiments of the utility model are as follows: 1. The integrated reaction device for catalytic reforming of methanol comprises a shell, wherein a reaction chamber is arranged at the upper part of the shell, a combustion chamber is arranged at the lower part, a circulation pipeline for circulating a heating medium is arranged between the reaction chamber and the combustion chamber; a heating tube array for providing heat to the heating medium is arranged in the combustion chamber, a fuel delivery module connected to the feed end of the heating tube array is arranged on the outside of the shell, the overall structure is compact, and no open flame heating is required during use, thereby improving production safety.

[0014] 2. Preheating can be achieved by using high-temperature flue gas recovery pipelines.

[0015] 3. The design of the exhaust gas recovery pipeline can make secondary use of the exhaust gas, which plays a role in energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] In the figure: 1. Shell; 2. Reaction chamber; 3. Combustion chamber; 4. Circulation duct; 5. Heating tubes; 6. Fuel delivery duct; 7. Air delivery duct; 8. Methanol vaporizer; 9. Heat exchanger 1; 10. Draft fan 1; 11. Draft fan 2; 12. Oxygen meter; 13. Reaction tubes; 14. Filler; 15. Hydrogen separation equipment; 16. Tail gas recovery duct; 17. High-temperature flue gas recovery duct. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0019] like Figure 1As shown, the methanol catalytic reforming integrated reaction device of this embodiment includes a shell 1, a reaction chamber 2 is provided on the upper part of the shell 1 for preparing hydrogen after introducing a methanol-water vapor mixture, a combustion chamber 3 is provided on the lower part for providing heat for the reaction chamber 2, a circulation pipeline 4 for circulating a heating medium is provided between the reaction chamber 2 and the combustion chamber 3, thermal oil is used for heat conduction and deheating, and a circulation pump is provided on the circulation pipeline; a heating tube 5 for providing heat for the heating medium is provided in the combustion chamber 3, the heating tube 5 is filled with a catalyst for flameless combustion of methanol, a fuel delivery module connected to the feed end of the heating tube 5 is provided on the outside of the shell 1, air and methanol vapor are filled into the heating tube 5, and the space occupied by the entire hydrogen preparation device is saved after the heating equipment and the reaction equipment are highly integrated by using the shell, and at the same time, methanol catalytic flameless combustion is utilized to provide heat without an open flame, which is safer.

[0020] The fuel delivery module includes a fuel delivery pipeline 6 and an air delivery pipeline 7. A methanol vaporizer 8 is provided on the fuel delivery pipeline 6 for generating methanol gas. A heat exchanger 9 is provided at the air inlet end of the air delivery pipeline 7. The function of the heat exchanger 9 is to preheat the air and then deliver it to the heating tube array 5. The air and formaldehyde gas are delivered to the heating tube array 5 to provide heat through catalytic reaction to heat the heating oil.

[0021] A high-temperature flue gas recovery pipe 17 is provided at the output end of the heating tube array 5. The ends of the high-temperature flue gas recovery pipe 17 are respectively connected to the methanol vaporizer 8 and the heat exchanger 9. The function of the high-temperature flue gas recovery pipe 17 is to recover the heat discharged from the formaldehyde catalytic reaction and preheat the methanol and air through heat recovery.

[0022] An induced draft fan 10 is provided on the fuel delivery pipeline 6, an induced draft fan 2 11 is provided on the air delivery pipeline 7, and an oxygen meter 12 is provided at the feed end of the heating tube array 5. The oxygen meter 12 adopts a zirconium oxide oxygen meter and is used to detect the oxygen content in the mixed gas delivered to the heating tube array 5.

[0023] The reaction chamber 2 is provided with a reaction tube 13 for introducing a methanol-water vapor mixture. The reaction tube 13 is provided with a filler 14, and the filler uses a catalytic reforming catalyst. A hydrogen separation device 15 is provided at the discharge end of the reaction tube 13. The hydrogen separation device 15 uses PSA to separate tail gas and hydrogen, recover the produced hydrogen and discharge the waste gas.

[0024] The discharge end of the hydrogen separation device 15 is provided with a tail gas recovery pipeline 16 connected to the fuel delivery module. The function of the tail gas recovery pipeline 16 is to transport the tail gas after hydrogen separation to the heating tube array 5 for recycling, which plays a role in energy conservation and emission reduction. During the transportation process, a heat exchanger 18 is added to preheat the tail gas before it is introduced.

[0025] Working principle / assembly process of this scheme: liquid methanol is vaporized by methanol vaporizer and then transported by fuel delivery pipeline 6, air is preheated by heat exchanger 9 and then transported by air delivery pipeline 7, during the transportation process, both fuel delivery pipeline 6 and air delivery pipeline 7 are metered by flowmeter, air and vaporized methanol enter heating tube 5 and react with catalyst to generate heat to heat the heating medium, and then the heating oil is transported to reaction chamber 2 through circulation pump to provide heat for hydrogen preparation, methanol-water vapor mixture undergoes catalytic reaction in reaction tube 13 to produce hydrogen, carbon monoxide, carbon dioxide and other mixed gases, and then hydrogen is separated and purified by PSA, a part of which is converted into high-purity hydrogen, and the other part of separated tail gas enters heat exchanger 2 18 for preheating, after preheating, it is mixed with methanol vapor by induced draft fan 10 and transported to heating tube for secondary utilization, heat exchanger 1 9 and heat exchanger 2 18 both adopt gas-to-gas heat exchanger.

[0026] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0029] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A methanol catalytic reforming integrated reaction device, comprising a housing (1), characterized in that: The upper part of the shell (1) is provided with a reaction chamber (2), the lower part is provided with a combustion chamber (3), and a circulation pipe (4) for circulating a heating medium is provided between the reaction chamber (2) and the combustion chamber (3); A heating tube (5) for providing heat to a heating medium is arranged in the combustion chamber (3), and a fuel delivery module connected to a feed end of the heating tube (5) is arranged outside the shell (1).

2. The methanol catalytic reforming integrated reaction device according to claim 1, characterized in that: The fuel delivery module comprises a fuel delivery pipeline (6) and an air delivery pipeline (7); a methanol vaporizer (8) is arranged on the fuel delivery pipeline (6); and a heat exchanger (9) is arranged at the air inlet end of the air delivery pipeline (7).

3. The methanol catalytic reforming integrated reaction device according to claim 2, characterized in that: The output end of the heating tube array (5) is provided with a high-temperature flue gas recovery pipeline (17), and the ends of the high-temperature flue gas recovery pipeline (17) are respectively connected to the methanol vaporizer (8) and the heat exchanger 1 (9).

4. The methanol catalytic reforming integrated reaction device according to claim 2, characterized in that: The fuel delivery pipeline (6) is provided with an induced draft fan 1 (10), the air delivery pipeline (7) is provided with an induced draft fan 2 (11), and the feed end of the heating tube array (5) is provided with an oxygen meter (12).

5. The methanol catalytic reforming integrated reaction device according to claim 1, characterized in that: The reaction chamber (2) is provided with a reaction tube (13) for introducing a methanol-water vapor mixture, the reaction tube (13) is provided with a filler (14), and a hydrogen separation device (15) is provided at the discharge end of the reaction tube (13).

6. The methanol catalytic reforming integrated reaction device according to claim 5, characterized in that: The discharge end of the hydrogen separation device (15) is provided with a tail gas recovery pipeline (16) which is in communication with the fuel delivery module.

Images