High purity hydrogen liquefier
The hydrogen liquefaction system stands as a pivotal technological apparatus within high-tech industries such as large-scale scientific projects, aerospace, and new energy sectors. Serving as a critical manifestation of a nation's comprehensive competitiveness, this system plays a fundamental role in various aspects. Its application within the hydrogen utilization industry chain enables the efficient storage and transportation of liquid hydrogen at atmospheric pressure, presenting a remarkable breakthrough. This innovative capability significantly reduces transportation costs, bolsters application safety, and enhances the lifespan of hydrogen fuel cells, thereby addressing crucial challenges in the field. Moreover, the economic benefits and social value derived from the widespread adoption of the hydrogen liquefaction system are immense, creating opportunities for transformative advancements and sustainable development across industries and communities.
1. Hydrogen Compression: Gaseous hydrogen from the source is compressed using reciprocating or centrifugal compressors. The compression raises the pressure of the hydrogen gas, typically to several hundred bar, preparing it for further processing.
2. Hydrogen Purification: The compressed hydrogen gas undergoes purification to remove impurities that could interfere with the liquefaction process. Various purification techniques such as pressure swing adsorption (PSA), membrane separation, or catalytic processes are employed to remove moisture, carbon dioxide, and trace hydrocarbons.
3. Cooling and Pre-Cooling: The purified hydrogen gas is cooled using a heat exchanger and a refrigeration system. The gas is first pre-cooled using ambient air or cooling water to reduce its temperature. Subsequently, the gas is further cooled using a cryogenic fluid such as helium or nitrogen in a multi-stage heat exchanger to achieve a lower temperature range.
4. Liquefaction Cycle: The pre-cooled hydrogen gas enters the liquefaction cycle, which typically follows the Claude or Linde cycle. In this cycle, the gas is expanded through a series of expansion turbines, allowing it to undergo adiabatic cooling. The expanded gas is then condensed by counter-current heat exchange with a colder hydrogen stream, further reducing its temperature.
5. Condensation: The cooled and expanded hydrogen gas enters a series of condensers where it undergoes a phase change from gas to liquid. The gas is exposed to a colder hydrogen stream or a cryogenic fluid, causing it to condense and form liquid hydrogen droplets.
6. Separation and Storage: The liquid hydrogen is separated from any remaining gas and collected in cryogenic storage tanks. These tanks are designed to maintain extremely low temperatures, typically below -250°C (-418°F), to prevent evaporation and maintain the liquid state. Specialized insulation systems, such as vacuum insulation or multi-layered insulation, are employed to minimize heat transfer.
7. Distribution: The stored liquid hydrogen can be distributed via cryogenic tanker trucks or transferred to other storage facilities. Cryogenic transfer systems, including pumps and vaporizers, are utilized to maintain the low temperature and convert the liquid hydrogen back into gaseous form if necessary.
| Product model |
WBH-1000 |
| Hydrogen liquefaction capacity |
1000 L/h |
| Helium mass flow rate |
428 g/s |
| Liquid nitrogen consumption |
840 L/h |
| Compressor electrical power |
550 KW x 2 |
| Operating pressure |
4-20 bar |
| Hydrogen purity |
>6 N |
| Continuous operation |
>8000 h |
| Turbine speed |
81700 r/min |
| Specific power consumption |
0.866 KWh/L, 12.81 KW/kg |
| Product model |
WBH-1500 |
| Hydrogen liquefaction capacity |
200-2500 Kg/D |
| Operating pressure |
4-20 bar |
| Hydrogen purity |
>6 N |
| Continuous operation |
>8000 h |
| Turbine speed |
81700 r/min |
| Secondary hydrogen content |
≥95% |
| Product model |
WBH-5000 |
| Hydrogen liquefaction capacity |
5-100T/D |
| Hydrogen purity |
≥99.999% |
| Secondary hydrogen content |
≥95% |
| Plant size |
5-30 T Hydrogen Liquefaction Unit |
Utilizing Helium Refrigeration in Hydrogen Liquefaction Cycle: By not using hydrogen as the working fluid in the cycle, this approach ensures safety and offers easy regulation of liquefaction capacity.
Adopting a 4-stage Positive-to-Secondary Hydrogen Converter: This converter design enables a closer approximation to continuous conversion, reduces conversion heat, improves energy efficiency, and facilitates manufacturing and maintenance processes.
Ultra-Low Leakage Plate-Fin Heat Exchangers: These heat exchangers achieve a leakage rate of less than 10^-9 Pa·m^3/s, ensuring minimal loss and maintaining system integrity.
Intelligent Control Technology: Incorporating a user-friendly interface, this technology enables stable control and incorporates safety interlocks for enhanced operational reliability.
Multi-Point Hydrogen Component Monitoring: Ensuring product quality and safety assurance, this feature enables monitoring of hydrogen composition at multiple points throughout the process.
| Hydrogen energy storage |
Hydrogen storage |
| Hydrogen transportation |
Superconducting power |
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