Clarifications on Hangyang’s instructions – come in!
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“Since the loaded molecular sieve is being used for the first time, it should be activated thoroughly; the heating time can be longer than that for normal regeneration. However, the amount of heated nitrogen gas used should be appropriately reduced compared to normal heating conditions. Activation generally requires more than 2 to 3 consecutive cycles of operation. (This system is designed to operate for 4 hours per unit; during activation, the amount of inlet air can be reduced to 90% of the normal level, thereby appropriately extending the operating time per unit.) ”)” This is the content of the instruction manual for Hangyang’s purification system; it states that “the amount of heated nitrogen gas used should be reduced appropriately compared to the normal amount required for heating”. Why? How much should it be reduced to?
When initial regeneration is considered, the amount of air entering the adsorber is lower than under normal operating conditions, and the heating time is also longer. Therefore, \"the amount of air used for heating the contaminated nitrogen gas should be reduced appropriately compared to the normal amount needed for heating\" – generally, a reduction of 5% to 10% compared to the normal regeneration air volume is acceptable. Of course, it is also necessary to take into account the total amount of air required for processing~~
“The amount of heated nitrogen gas used should be reduced appropriately compared to the normal amount for heating. Why? To increase the regeneration temperature. Application of the principle of high-temperature and low-pressure desorption of molecular sieves.
The newly loaded molecular sieve has absorbed some water; it needs to be fully activated in order to perform optimally in subsequent cycles. Increasing the temperature of the gas fed into the adsorber helps to achieve a more complete regeneration of the molecular sieve. The designed intake temperature is 170; it is possible to raise the intake temperature to 180–200. During operation, you can ask the Hangyang project engineer on site for guidance.
It depends on the project. For large projects, the chief designer will definitely go, while for smaller projects, an experienced project engineer is usually assigned to guide the newcomers.