Serious Consequences of Using Poor Quality Activated Alumina

Activated alumina desiccant, commonly known as aluminum gel, is a very stable new desiccant, widely used in a variety of non-thermal or thermal regenerative adsorption dryer. Dry under certain operating and regeneration conditions. When the depth reaches the dew point, the temperature is below -70℃. White spherical, pore distribution uniform, strong water absorption capacity, pore, high strength. It does not soften, crack, expand and shatter when immersed in water. 

Activated alumina desiccant has become one of the widely used desiccant in industrial production. For example, power plants, coal mines, steel mills and so on. Deep dry gas is needed in the production process. The quality of aluminum desiccant plays a decisive role in the performance of regenerative adsorption desiccant to ensure the long-term stable and reliable operation of desiccant.

If the use of inferior activated alumina desiccant, it will have serious consequences:

1. Poor strength, wear under the action of airflow, adsorption area decreases, water absorption efficiency decreases, dew point increases. In addition, a large amount of powder produced by wear is easy to block the downstream filter element, leading to pressure differential rise and even failure of tubular filter, increase of system pressure drop, increase of energy consumption of air compressor, and even directly damage the dryer.

2. Alumina will fail when it expands, softens or even crushes in contact with water.

3. Small specific surface area, the same load of alumina desiccant does not meet the requirements of water absorption area, low efficiency, dew point does not meet the design requirements.

Several indicators of activated alumina desiccant play an important role in the production process:

1. The smaller the wear rate, the longer the life of the desiccant, the less powder, and the lower the operation cost.

2. The larger the specific surface area, the better the water absorption effect, the lower the dew point of the treated compressed air, the stable and reliable production.

3. The higher the compressive strength, the softer the water and the smaller the expansion, further ensuring the service life and operation reliability.