The determination of the failure of alumina desiccant is mainly based on observing its physical state and usage effect. Here are some specific judgment methods:

Observe the physical state

Color change:

The color of activated alumina desiccant may change after a period of use. If the color of the desiccant is noticeably yellow or dark, it may indicate that it has been dampened or has failed.

Morphological changes:

For certain types of alumina desiccants, such as quicklime desiccants, they will change from white lumps to powder after absorbing moisture. If this morphological change is observed, it indicates that the desiccant has failed.

Evaluation of Usage Effectiveness

Moisture content determination:

By measuring the moisture content of the used alumina desiccant, it can be determined whether it is still effective. If the moisture content exceeds the standard, it indicates that the desiccant has lost its adsorption capacity.

Equipment performance:

If the performance of equipment using alumina desiccant (such as dryers) deteriorates, such as excessive water content in compressed air, rising dew point, etc., this may be a manifestation of desiccant failure.

precautions

To avoid misjudgment:

When determining whether the alumina desiccant has failed, attention should be paid to avoiding misjudgment. For example, some desiccants do not show significant color changes after absorbing moisture and require comprehensive judgment through other methods.

Regular replacement:

To ensure the normal operation of the equipment and the production quality of the product, it is recommended to regularly replace the alumina desiccant and avoid using expired or ineffective desiccants.

Regeneration treatment:

For certain types of alumina desiccants, such as activated alumina ball desiccants, if their water pore size is saturated, they can be regenerated at high temperatures to restore their adsorption capacity. However, it should be noted that the performance of the regenerated desiccant may not fully recover to the level of the new product.

In summary, by observing the physical state and usage effect, it can be determined whether the alumina desiccant is ineffective. During the judgment process, attention should be paid to avoiding misjudgments and regularly replacing desiccants to ensure the normal operation of equipment and the production quality of products.