A large-scale hydrogen purification production device with external heater

Abstract

The utility model provides a kind of hydrogen purification production device of large-scale external heater, it is related to hydrogen purification production technical field, and it includes: first gas-water separator, with the first gas-water separator connection external preheater, with the external preheater connection external electric heater, the first cooler of being arranged in the first gas-water separator side, with the first cooler connection gas-liquid separator, with the gas-liquid separator connection drying device and with the drying device connection regeneration component;The external preheater one end is connected with the first cooler;The external electric heater one end is connected with deoxidizer, and the deoxidizer other end is connected with the external preheater;The drying device one end is connected with second filter;The utility model is coupled with the setting of external preheater and external electric heater, reduces the heat burden of external electric heater, to reduce the energy consumption of entire purification system, and reduces the amount of use of chilled water.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen purification and production technology, and in particular to a hydrogen purification and production device with a large-scale external heater. Background Technology

[0002] Against the backdrop of the current energy transition, hydrogen, as a clean and efficient energy carrier, is becoming increasingly important. Currently, there are various industrial methods for hydrogen production, including natural gas reforming, methanol reforming, water-gas production, and water electrolysis. Among these, water electrolysis uses water as its feedstock, but the reaction product after energy consumption is also water; therefore, water electrolysis is considered the most promising method for hydrogen production. Furthermore, hydrogen energy has been formally included in the management scope of resources such as oil, coal, and natural gas, and the future energy structure is shifting towards clean hydrogen energy. In addition, the purity of hydrogen significantly affects its downstream applications; therefore, improving hydrogen purity with low energy consumption is crucial for its application.

[0003] Traditional hydrogen purification production equipment not only has a high heat load in the heating process, resulting in excessive energy consumption, but also struggles to achieve efficient and uniform heating when processing large quantities of hydrogen. Furthermore, due to the unsatisfactory heating effect, a large amount of chilled water is often required for cooling and temperature regulation, further increasing costs and resource consumption. Moreover, existing equipment cannot effectively remove moisture from hydrogen in terms of gas-liquid separation and drying.

[0004] In addition, with the development of renewable energy, the production scale and load variation range of hydrogen are constantly expanding. Existing purification equipment often exhibits problems such as insufficient adaptability and poor stability in the face of large-scale production and significant load changes, making it difficult to meet actual needs. Utility Model Content

[0005] The purpose of this invention is to provide a large-scale hydrogen purification and production device with an external heater, thereby solving the technical problems existing in the prior art.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A large-scale hydrogen purification production apparatus with an external heater includes: a first gas-liquid separator, an external preheater connected to the first gas-liquid separator, an external electric heater connected to the external preheater, a first cooler disposed on one side of the first gas-liquid separator, a gas-liquid separator connected to the first cooler, a drying device connected to the gas-liquid separator, and a regeneration component connected to the drying device; one end of the external preheater is connected to the first cooler; one end of the external electric heater is connected to a deoxygenator, and the other end of the deoxygenator is connected to the external preheater; one end of the drying device is connected to a second filter; both the regeneration component and the second filter are connected to a hydrogen discharge pipe.

[0008] Furthermore, the drying device includes: a first dryer, a second dryer, and a third dryer; the first dryer, the second dryer, and the third dryer are arranged in parallel, and at least one of them is provided with a molecular sieve inside.

[0009] Furthermore, the regeneration component includes: a preheater, a second cooler connected to the preheater, a second gas-water separator connected to the second cooler, and a heater connected to one end of the preheater; the preheater is connected to the drying device, the drying device is connected to the first filter, and the first filter is connected to the hydrogen discharge pipe.

[0010] Furthermore, one end of the first gas-water separator is connected to a nitrogen filling pipe and a hydrogen filling pipe; both ends of the first cooler are connected to chilled water filling pipes.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (i) The combination of the external preheater and the external electric heater in this utility model reduces the heat load of the external electric heater, thereby reducing the energy consumption of the entire purification system and reducing the amount of chilled water used;

[0013] (ii) By setting up a first gas-water separator, a second gas-water separator, a drying device and a regeneration component, this utility model can effectively remove moisture from hydrogen and improve the purity and dryness of hydrogen.

[0014] (iii) This utility model is applicable to large-scale renewable energy hydrogen purification systems with load variations of 30% to 110%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the working principle of this utility model;

[0016] In the diagram: 1. First gas-liquid separator; 2. External preheater; 3. External electric heater; 4. Deaerator; 5. First cooler; 6. Gas-liquid separator; 7. First dryer; 8. Second dryer; 9. Third dryer; 10. First filter; 11. Second filter; 12. Heater; 13. Preheater; 14. Second cooler; 15. Second gas-liquid separator; 16. Hydrogen discharge pipe; 17. Chilled water filling pipe; 18. Nitrogen filling pipe; 19. Hydrogen filling pipe. Detailed Implementation

[0017] To make the content of this utility model easier to understand, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] like Figure 1As shown, this embodiment provides a large-scale hydrogen purification production apparatus with an external heater, including: a first gas-liquid separator 1, an external preheater 2 connected to the first gas-liquid separator 1, an external electric heater 3 connected to the external preheater 2, a first cooler 5 disposed on one side of the first gas-liquid separator 1, a gas-liquid separator 6 connected to the first cooler 5, a drying device connected to the gas-liquid separator 6, and a regeneration component connected to the drying device; one end of the first gas-liquid separator 1 is connected to a nitrogen filling pipe 18 and a hydrogen filling pipe 19, and so on. The first gas-liquid separator 1 is used for gas-liquid separation of hydrogen and nitrogen, separating free water, which is discharged from the bottom of the first gas-liquid separator 1. One end of the external preheater 2 is connected to the first cooler 5. The external preheater 2 can preheat the hydrogen, reducing the energy consumption of the external electric heater 3. The first cooler 5 cools the high-temperature hydrogen to a preset temperature range, causing impurities in the hydrogen to condense or liquefy. The hydrogen is then extracted by the gas-liquid separator 6, thereby improving the purity of the hydrogen. Both ends of the first cooler 5 are connected to a refrigeration unit. A water supply pipe 17 is connected; one end of the external electric heater 3 is connected to the deoxidizer 4, and the other end of the deoxidizer 4 is connected to the external preheater 2. The deoxidizer 4 contains an aluminum oxide-based palladium catalyst, which is commonly used in hydrogenation, dehydrogenation, and oxidation reactions. The external electric heater 3 converts electrical energy into heat energy to provide the necessary heat for the hydrogen purification process and precisely controls the heating temperature to meet the temperature requirements of different reaction stages. Furthermore, by coupling with the external preheater 2, the external electric heater... The heat load of heater 3 is reduced, thereby reducing energy consumption and energy waste; one end of the drying device is connected to the second filter 11, and the drying device removes moisture from the hydrogen through physical adsorption, improving the dryness and purity of the hydrogen; the regeneration component and the second filter 11 are both connected to the hydrogen discharge pipe 16, and the regeneration component can reprocess the remaining gas after drying by the first drying device to finally form hydrogen that meets the preset requirements, avoiding resource waste, reducing environmental pollution, thereby improving resource utilization and ensuring the purity of hydrogen.

[0019] Specifically, the drying device includes a first dryer 7, a second dryer 8, and a third dryer 9; the first dryer 7, the second dryer 8, and the third dryer 9 are arranged in parallel, and at least one of them is equipped with a molecular sieve, which is a 13X type molecular sieve with a uniform microporous structure and a relatively fixed pore size; the 13X type molecular sieve also has a strong adsorption capacity and can adsorb substances such as moisture, carbon dioxide, and hydrogen sulfide in the gas; during operation, the first dryer 7, the second dryer 8, and the third dryer 9 work in a cycle, specifically, one is responsible for normal operation, one is responsible for regeneration, and one is responsible for regeneration adsorption, and the specific operation and corresponding dryer are not limited again.

[0020] During operation, hydrogen enters the first gas-liquid separator 1 through the hydrogen filling pipe 19 for gas-liquid separation, forming free water and hydrogen. The free water is discharged from the bottom of the first gas-liquid separator 1, and the hydrogen is discharged from the top. It then enters the external preheater 2 of the deoxygenation tower for preheating. The preheated hydrogen enters the external electric heater 3 and is heated to 100-120°C. The heated hydrogen then enters the deoxygenator 4 for deoxygenation. The hydrogen contacts the alumina-based palladium catalyst in the deoxygenator 4, removing trace amounts of oxygen through a reaction between trace amounts of oxygen and hydrogen to produce water. The deoxygenated hydrogen then re-enters the external preheater 2... The hydrogen gas entering the external electric heater 3 is preheated to reduce energy consumption. After passing through the external preheater 2, the hydrogen gas enters the first cooler 5 for cooling to 20-40℃, cooling the water produced in the deoxygenation reaction. The cooled hydrogen gas then enters the gas-liquid separator 6 to separate the water produced in the deoxygenation reaction. Afterward, it enters the first dryer 7, the second dryer 8, or the third dryer 9, operating at 30-50℃. The dried gas enters the second filter 11, where a portion is used as cold regeneration gas and enters the regeneration component, while the other portion is discharged from the system through the hydrogen exhaust pipe 16. Specifically, the deoxygenation principle is as follows:

[0021] Specifically, the regeneration components include: a preheater 13, a second cooler 14 connected to the preheater 13, a second gas-water separator 15 connected to the second cooler 14, and a heater 12 connected to one end of the preheater 13; the preheater 13 is connected to the drying device, the drying device is connected to the first filter 10, and the first filter 10 is connected to the hydrogen exhaust pipe 16; during operation, cold regeneration gas enters the preheater 13 and then enters the heater 12, and the regeneration gas heated to 180-250°C exits from the first dryer 7 and the second dryer 15. The regenerated gas containing water, which is discharged from the top of the first dryer 8 or the third dryer 9, enters the preheater 13 to heat the incoming cold regenerated gas, thereby achieving its own cooling. Then, it enters the second cooler 14 for deep cooling. After that, the second gas-water separator 15 separates and removes the water from the regeneration tower. The separated gas discharged from the top of the second gas-water separator 15 re-enters the first dryer 7, the second dryer 8, or the third dryer 9 for regeneration gas adsorption to remove trace amounts of water. The hydrogen adsorbed from the drying device enters the first filter 10 and is discharged through the hydrogen discharge pipe 16.

[0022] The above description is only a preferred embodiment of this utility model patent and is not intended to limit this utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model patent should be included within the protection scope of this utility model patent.

Claims

1. A large-scale hydrogen purification and production apparatus with an external heater, characterized in that: include: The system comprises a first gas-liquid separator (1), an external preheater (2) connected to the first gas-liquid separator (1), an external electric heater (3) connected to the external preheater (2), a first cooler (5) disposed on one side of the first gas-liquid separator (1), a gas-liquid separator (6) connected to the first cooler (5), a drying device connected to the gas-liquid separator (6), and a regeneration component connected to the drying device; one end of the external preheater (2) is connected to the first cooler (5); one end of the external electric heater (3) is connected to the deoxygenator (4), and the other end of the deoxygenator (4) is connected to the external preheater (2); one end of the drying device is connected to the second filter (11); and both the regeneration component and the second filter (11) are connected to the hydrogen exhaust pipe (16).

2. The hydrogen purification and production apparatus with a large-scale external heater according to claim 1, characterized in that: The drying device includes a first dryer (7), a second dryer (8), and a third dryer (9); the first dryer (7), the second dryer (8), and the third dryer (9) are arranged in parallel, and at least one of them is provided with a molecular sieve inside.

3. The hydrogen purification and production apparatus with a large-scale external heater according to claim 1, characterized in that: The regeneration component includes: a preheater (13), a second cooler (14) connected to the preheater (13), a second gas-water separator (15) connected to the second cooler (14), and a heater (12) connected to one end of the preheater (13); the preheater (13) is connected to the drying device, the drying device is connected to the first filter (10), and the first filter (10) is connected to the hydrogen discharge pipe (16).

4. The hydrogen purification and production apparatus with a large-scale external heater according to claim 1, characterized in that: One end of the first gas-water separator (1) is connected to the nitrogen filling pipe (18) and the hydrogen filling pipe (19); both ends of the first cooler (5) are connected to the chilled water filling pipe (17).

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