Conversion of vacuum process for pressure swing adsorption carbon removal to purge process
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Our company has a pressure swing adsorption decarburization unit with a gas processing capacity of 70,000 Nm³/h; previously, a vacuum extraction process was used. We are now planning to replace the vacuum pump with a purging process flow. Which sea user is employing the purging process? Please describe the usage situation, whether it meets the design requirements, and whether the CO2 level in the purified gas satisfies the specified standards.
This post was last edited by ZZJJAA70 on 2009-11-21 at 17:29. It should be possible to make changes, but the poster needs to consider various factors, as there is a greater loss of effective gas during the purging process.
It can be modified. If reducing production capacity is not a concern, the first step is to design the process flow and create timing diagrams for the operation of each programmable valve. Generally, only minor changes are required, mainly related to adjusting the timing of the valves’ operations; the programs in the PLC or DCS need to be altered accordingly based on those timing diagrams； After switching from a vacuum process to a purge process, the efficiency of using the adsorbent decreases. To meet the requirements of the product gas, the processing capacity of this device has to be reduced, and the gas loss per unit of product increases. The electricity savings resulting from the use of vacuum pumps may not be sufficient to offset these losses. If it is necessary to maintain the original processing capacity, additional adsorption towers will have to be added, which means that the amount of work required for the modification will increase. Please make a decision after considering all these factors.
Is it necessary to change the scanning process? Gas loss increases, production capacity decreases, and the number of pressure equalization operations also rises. It is recommended that the original poster think of ways to improve the vacuum pump