Methanol hydrogen production device with hydrogen pressurization system

Abstract

The utility model discloses a methanol hydrogen production device with a hydrogen pressurization system, which comprises a first reforming reactor, a hydrogen purification device and a pneumatic supercharger, the reforming reactor is provided with a first reformer inlet and a first reformed gas outlet; the hydrogen purification device is provided with a purification device inlet, a hydrogen collection outlet and a desorbed gas collection outlet; the pneumatic supercharger is provided with a compression cavity inlet end, a compression cavity outlet end, an air inlet and an air outlet; the hydrogen collecting outlet is communicated with the compression cavity inlet; and the desorbed gas collecting outlet is communicated with the gas inlet. According to the technical scheme, the problem that the pressure of an obtained hydrogen outlet is low after the reforming mixed gas is purified by the hydrogen purification device can be solved, and the power consumption and the cost of the whole equipment are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of methanol hydrogen production, in particular to a methanol hydrogen production device provided with a hydrogen boosting system. Background Art

[0002] In methanol hydrogen production technology, hydrogen purification mainly uses PSA and palladium membrane separation technology. The domestic market has very mature PSA purification application technology and stable operating conditions, while membrane separation technology is still under development.

[0003] However, in the process of producing hydrogen from methanol, the hydrogen outlet pressure obtained after using palladium membrane separation technology is low, resulting in problems such as large size of the back-end compression equipment, high power consumption, and complex process. Even when connecting to a hydrogen fuel cell, an additional boost pump is required to increase the pressure to solve the problem of low hydrogen outlet pressure. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides the following technical solutions:

[0005] A methanol hydrogen production device with a hydrogen boosting system is provided, comprising a first reforming reactor and a hydrogen purification device, characterized in that the methanol hydrogen production device also includes a pneumatic booster; the reforming reactor is provided with a first reformer inlet and a first reformed gas outlet; the hydrogen purification device is provided with a purification device inlet, a hydrogen collection outlet and a desorption gas collection outlet; the pneumatic booster is provided with a compression chamber inlet end, a compression chamber outlet end and an air inlet and an air outlet; the hydrogen collection outlet is communicated with the compression chamber inlet; the desorption gas collection outlet is communicated with the air inlet.

[0006] Preferably, the device is further provided with a methanation reactor; the methanation reactor is arranged between the hydrogen purification device and the pneumatic booster, and is provided with a reactor inlet and a reactor outlet; the reactor inlet is connected to the hydrogen collection outlet.

[0007] Preferably, the device is further provided with a finished hydrogen buffer tank, and the finished hydrogen buffer tank is connected to the outlet end of the compression chamber.

[0008] Preferably, the device is further provided with a catalytic burner, and the burner is provided with a burner inlet, and the burner inlet is communicated with the air outlet.

[0009] Preferably, the device is further provided with a second reforming reactor; the second reforming reactor is provided with a second reformer inlet and a second reformed gas outlet; the first reformed gas outlet is connected to the second reformer inlet; the second reformed gas outlet is connected to the purification device inlet.

[0010] Preferably, the hydrogen purification device is provided with a plurality of hydrogen purifiers, and the hydrogen generated by each of the hydrogen purifiers is collected at the hydrogen collection outlet; the decomposed gas generated by each of the hydrogen purifiers is collected at the decomposed gas collection outlet.

[0011] Preferably, the hydrogen production device further includes a manifold for buffering and balancing gas pressure fluctuations in the hydrogen production device.

[0012] Preferably, the manifold includes a first manifold, a second manifold and a third manifold; the first manifold is arranged between the second reformed gas outlet and the inlet of the hydrogen purification device; the second manifold is arranged between the reactor outlet and the compression chamber inlet; the third manifold is arranged between the analytical gas collection outlet and the air inlet.

[0013] Preferably, the hydrogen production device also includes a first filter and a second filter; the first filter is arranged between the second reformed gas outlet and the gas inlet of the first manifold; the second filter is arranged between the compression chamber outlet and the finished hydrogen buffer tank.

[0014] Preferably, the hydrogen production device is further provided with an air compressor and a plurality of heat exchangers, wherein the air compressor is used to provide air for the catalytic burner; and the plurality of heat exchangers are used to recycle heat energy in the hydrogen production device.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] By utilizing the characteristics of palladium membrane separation, high-purity hydrogen is separated out by using the high pressure of reformed gas to pass through the palladium membrane, while the mixed gas that does not pass through the palladium membrane eventually enters the combustion reactor. On the one hand, the working principle of the pneumatic booster pump is utilized, combined with the analytical gas that does not pass through the palladium membrane as the gas source of the pneumatic booster pump, so that the gas booster can achieve reciprocating operation and pressurize the hydrogen at the finished product end to the set pressure, thereby solving the problem of low palladium membrane outlet pressure in terminal applications; on the other hand, it provides thermal energy for the methanol hydrogen production device, thereby improving the thermal energy utilization rate of the hydrogen production device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the process of Example 1 of the present application;

[0018] Figure 2 This is a flow chart of Example 2 of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] A methanol hydrogen production device with a hydrogen boosting system includes a first reforming reactor 1, a hydrogen purification device 2 and a pneumatic supercharger 3; the reforming reactor 1 is provided with a first reformer inlet 11 and a first reformed gas outlet 12; the hydrogen purification device 2 is provided with a purification device inlet 21, a hydrogen collection outlet 22 and a desorption gas collection outlet 23; the pneumatic supercharger 3 is provided with a compression chamber inlet end 31, a compression chamber outlet end 32, an air inlet 33 and an air outlet 34; the air inlet 34 and the air outlet 34 are arranged at the same end of the supercharger 3; the compression chamber inlet end 31 and the compression chamber outlet end 32 are both arranged at the other end of the supercharger 3. The first reformed gas outlet 12 is communicated with the purification device inlet 21 of the hydrogen purification device 2; the hydrogen collection outlet 22 is communicated with the compression chamber inlet end 31 of the pneumatic supercharger 3; the desorption gas outlet 33 is communicated with the air inlet 33 of the pneumatic supercharger 3.

[0022] During operation, methanol vapor flows in through the first reformer inlet 11 of the reforming reactor 1, and a reforming reaction is carried out under the action of the catalyst. The reformed mixed gas obtained after the reforming reaction flows out through the first reformed gas outlet 12, and flows along the pipeline to the purification device inlet 21 and then flows into the hydrogen purification device 2, and the reformed mixed gas is purified in the hydrogen purification device 2. The purified high-concentration hydrogen flows out from the hydrogen collection outlet 22, and the remaining desorption gas flows out from the desorption gas collection outlet 23. After the purified hydrogen flows out of the hydrogen purification device 2, it continues to flow along the pipeline to the compression chamber inlet end 31 of the pneumatic supercharger 3; at the same time, the desorption gas flowing out of the hydrogen purification device 2 flows along the pipeline to the air inlet 33 of the pneumatic supercharger 3. In this technical solution, the analytical gas is used as the gas source of the pneumatic supercharger 3, so that the pneumatic supercharger 3 can work in a reciprocating manner, thereby pressurizing the purified hydrogen; the analytical gas flows into the supercharger 3 through the air inlet 33 and flows out through the air outlet 34 to enter the next step; the purified hydrogen flows into the supercharger 3 through the compression chamber inlet 31, and the purified hydrogen is compressed in the supercharger 3, and the hydrogen compressed to the target pressure flows out of the supercharger 3 through the compression chamber outlet 32. Thereby solving the problem of low hydrogen outlet pressure of hydrogen purification equipment in terminal applications.

[0023] Embodiment 2:

[0024] The difference between this embodiment and embodiment 1 is that the methanol hydrogen production device is further provided with a methanation reactor 4, a finished hydrogen buffer tank 5 and a catalytic burner 6. The methanation reactor 4 is used to remove the methane mixed in the purified hydrogen to improve the purity of the hydrogen; the methanation reactor 4 is arranged between the hydrogen purification device 2 and the pneumatic supercharger 3, and is provided with a reactor inlet 41 and a reactor outlet 42, the reactor inlet 41 is connected to the hydrogen collection outlet 22; the reactor outlet 42 is connected to the compression chamber inlet end 31 of the pneumatic supercharger 3. The finished hydrogen buffer tank 5 is used to temporarily store the purified hydrogen, which is arranged after the pneumatic supercharger 3 and is connected to the compression chamber outlet end 32 of the pneumatic supercharger 3. The catalytic burner 5 is arranged at the air outlet 34 of the pneumatic booster pump 3, and the catalytic burner 6 is provided with a burner inlet 61, an air inlet (not indicated) and a burner outlet (not indicated); the burner inlet 61 is connected to the air outlet 34 of the pneumatic booster pump 3; the desorption gas entering the catalytic burner 6 is catalytically burned therein, flows out from the burner outlet and provides heat energy for the operation of the methanol hydrogen production device after heat exchange. Furthermore, in order to enable the desorption gas to be fully burned in the catalytic burner 6, a compression fan 7 is also provided in the hydrogen production device, and the compression fan 7 is connected to the air inlet of the catalytic burner 6 to provide sufficient oxygen for the catalytic combustion reaction.

[0025] Furthermore, in order to allow methanol and water vapor to react fully, the methanol hydrogen production device is also provided with a second reforming reactor 8; the second reforming reactor 8 is provided with a second reformer inlet 81 and a second reforming gas outlet 82; so that the first reforming reactor 1 and the second reforming reactor 8 form a series structure.

[0026] At the same time, in order to improve the purification efficiency of hydrogen, the hydrogen purification device 2 is composed of multiple hydrogen purifiers, and the multiple hydrogen purifiers are arranged in parallel. In this embodiment, the hydrogen purification device 2 is composed of six hydrogen purifiers; each hydrogen purifier is provided with a purifier inlet, a hydrogen outlet and a desorption gas outlet; the hydrogen flowing out of the hydrogen outlet of each hydrogen purifier is collected at the hydrogen collection outlet 22; the desorption gas flowing out of the desorption gas outlet of each purifier is collected at the desorption gas collection outlet 23.

[0027] In addition, in order to keep the pressure in the entire methanol hydrogen production device in a balanced state, a booster pump 9 and a manifold are also provided in the methanol hydrogen production device; the booster pump 9 is used to pressurize the methanol water to reach the reaction pressure required by the reforming reactor; the manifold buffers and stabilizes the air flow fluctuations in the methanol hydrogen production device. Since two reforming reactors and multiple purifiers are provided in this technical solution, in order to reduce the pressure fluctuations generated when multiple air flows converge, the manifold includes a first manifold 13, a second manifold 14 and a third manifold 15. Among them, the first manifold 13 is arranged between the second reformed gas outlet 82 and the purification device inlet 21 to reduce the pressure fluctuation of the reformed mixed gas affecting the pressure of the inlet 21 of the purification device; the second manifold 14 is arranged between the reactor outlet 42 of the methanation reactor 4 and the compression chamber inlet end 31 of the pneumatic booster pump 3 to avoid the pressure fluctuation when multiple streams of purified hydrogen converge to cause the air flow instability at the compression chamber inlet end 31; the third manifold 15 is arranged between the analysis gas collection outlet 23 of the hydrogen purification device 2 and the air inlet 33 of the pneumatic booster 3 to avoid the pressure fluctuation generated when multiple streams of analysis gas converge to cause the air flow instability at the air inlet 33 of the pneumatic booster 3.

[0028] Meanwhile, the methanol hydrogen production device also includes a first filter 16 and a second filter 17. The first filter 16 is arranged between the second reformed gas outlet 82 and the gas inlet of the first manifold 13 to filter impurities in the reformed mixed gas; the second filter 17 is arranged between the compression chamber outlet 32 ​​of the gas booster 3 and the finished hydrogen buffer tank 5 to filter impurities in the compressed hydrogen, thereby ensuring the purity of the hydrogen.

[0029] Embodiment 3:

[0030] The difference between this embodiment and embodiment 1 or 2 is that the methanol hydrogen production device is further provided with a plurality of heat exchangers, through which the heat in the hydrogen production device can be recycled to improve the thermal efficiency of the system. For example, heat exchange is performed with the post-combustion gas of the catalytic burner through the heat exchanger to provide heat for vaporization of methanol water; or heat exchange is performed between the methanol water and the heat carried by the purified hydrogen through the heat exchanger to preheat the methanol water, etc.

[0031] The following is a detailed description of heat exchange of purified hydrogen as an example. The methanol hydrogen production device includes a first heat exchanger 18; the first heat exchanger 18 is used to heat exchange purified hydrogen with a methanol-water mixture, thereby preheating the methanol-water mixture. The first heat exchanger is provided with a material inlet 181, a material outlet 182, a heat exchange inlet 183, and a heat exchange outlet 184; the material inlet 181 is connected to the pneumatic booster pump 3, and the material outlet 182 is connected to the first reformer inlet 11; the heat exchange inlet 183 is connected to the gas outlet of the second manifold 14, and the heat exchange outlet 184 is connected to the compression chamber inlet 31 of the pneumatic booster 3.

[0032] In summary, the above technical solution can solve the problem of low outlet pressure of purified hydrogen obtained after purification by the hydrogen purification device, and effectively reduce the power consumption and cost of the entire equipment.

[0033] It should be noted that the technical features in the above-mentioned embodiments 1 to 3 can be combined arbitrarily, and the combined technical solutions all belong to the protection scope of the present application. And in this article, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A methanol hydrogen production device equipped with a hydrogen boosting system, comprising a first reforming reactor and a hydrogen purification device, characterized in that: The methanol hydrogen production device also includes a pneumatic booster; the reforming reactor is provided with a first reformer inlet and a first reformed gas outlet; the hydrogen purification device is provided with a purification device inlet, a hydrogen collection outlet and a desorption gas collection outlet; the pneumatic booster is provided with a compression chamber inlet end, a compression chamber outlet end, an air inlet and an air outlet; the hydrogen collection outlet is connected to the compression chamber inlet; the desorption gas collection outlet is connected to the air inlet.

2. The hydrogen production device according to claim 1, characterized in that: The device is also provided with a methanation reactor; the methanation reactor is arranged between the hydrogen purification device and the pneumatic supercharger, and is provided with a reactor inlet and a reactor outlet; the reactor inlet is connected to the hydrogen collection outlet.

3. The hydrogen production device according to claim 2, characterized in that: The device is also provided with a finished hydrogen buffer tank, and the finished hydrogen buffer tank is communicated with the outlet end of the compression chamber.

4. The hydrogen production device according to claim 3, characterized in that: The device is also provided with a catalytic burner, and the burner is provided with a burner inlet, and the burner inlet is communicated with the air outlet.

5. The hydrogen production device according to claim 3 or 4, characterized in that: The device is also provided with a second reforming reactor; the second reforming reactor is provided with a second reformer inlet and a second reformed gas outlet; the first reformed gas outlet is communicated with the second reformer inlet; the second reformed gas outlet is communicated with the purification device inlet.

6. The hydrogen production device according to claim 5, characterized in that: The hydrogen purification device is provided with a plurality of hydrogen purifiers, and the hydrogen generated by each hydrogen purifier is collected at the hydrogen collection outlet; the desorption gas generated by each hydrogen purifier is collected at the desorption gas collection outlet.

7. The hydrogen production device according to claim 6, characterized in that: The hydrogen production device also includes a manifold for buffering and balancing gas pressure fluctuations in the hydrogen production device.

8. The hydrogen production device according to claim 7, characterized in that: The manifold includes a first manifold, a second manifold and a third manifold; the first manifold is arranged between the second reformed gas outlet and the inlet of the hydrogen purification device; the second manifold is arranged between the reactor outlet and the compression chamber inlet end; the third manifold is arranged between the analytical gas collection outlet and the air inlet.

9. The hydrogen production device according to claim 8, characterized in that: The hydrogen production device also includes a first filter and a second filter; the first filter is arranged between the second reformed gas outlet and the gas inlet of the first manifold; the second filter is arranged between the compression chamber outlet and the finished hydrogen buffer tank.

10. The hydrogen production device according to claim 4, characterized in that: The hydrogen production device is also provided with an air compressor and a plurality of heat exchangers. The air compressor is used to provide air for the catalytic burner; the plurality of heat exchangers are used to recycle the heat energy in the hydrogen production device.

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