Pressure swing adsorption
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Hello everyone, I would like to ask how the time required for pressure swing adsorption can be calculated based on the load. Are there any standards for adjusting this time when the load increases or decreases? Thank you all
It can be adjusted according to the purity and amount required for export; generally, the changes should not be too large to avoid fluctuations. After making the adjustments, it is necessary to wait for one cycle to pass before checking the results before making further adjustments.
Generally, the adsorption time is adjusted based on your purity and overall load; for specific adjustment methods, please contact the manufacturer!
For the first 30% of the load during startup, we set the operating coefficient to 0.92. Increase the operating coefficient as the load rises. Increase the operating coefficient in steps of 0.02, and observe the results after one adjustment cycle.
Are there any methods or formulas for calculating time, or theoretical approaches to determining time?
This time is related to the total gas processing volume, the adsorption capacity per tower, the number of towers, the number of pressure equalization cycles, and the flushing method.
From a design perspective, this issue is quite complex; from an operational standpoint, it’s simpler—the ultimate goal is to ensure that the product purity meets the required standards and that the bed layer is not penetrated.
Could you send me some knowledge about design? Please, please
Could you give an example, please?
My understanding is: based on your hydrogen production volume and purity requirements, choose between 8 or 10 adsorption towers to determine the number of towers operating simultaneously for adsorption, as well as how many times pressure equalization should be carried out. In fact, the adsorption time for a single tower is usually around 2-3 minutes; if the adsorption time were too long, the tower would need to be much larger. For capacities below 20,000 cubic meters, the 8-2-4 or 8-1-4 configuration is mostly used, while for capacities above 20,000 cubic meters, the 10-2-4 configuration is generally adopted.