Activated alumina, silica gel and molecular sieve are the most commonly used desiccants in adsorption dryer. Active alumina desiccant is also called aluminum gel desiccant, mineral desiccant, active desiccant and active clay drier. It is a porous and highly dispersed solid material with large specific surface area, good adsorption properties, good pressure resistance, wear resistance and heat resistance. Therefore, they are widely used as efficient adsorbents, desiccants and various desiccants. Because of its strong water absorption capacity, the drying depth can be as high as - 70 under certain operating conditions and regeneration conditions, which is very suitable for non thermal regeneration device.
Activated alumina, silica gel and molecular sieve are the most commonly used desiccants in adsorption dryer. Active alumina desiccant is also called aluminum gel desiccant, mineral desiccant, active desiccant and active clay drier. It is a porous and highly dispersed solid material with large specific surface area, good adsorption properties, good pressure resistance, wear resistance and heat resistance. Therefore, they are widely used as efficient adsorbents, desiccants and various desiccants. Because of its strong water absorption capacity, the drying depth can be as high as - 70 under certain operating conditions and regeneration conditions, which is very suitable for non thermal regeneration device.
Dehydration is a common demand in industry, and the existence of water often has a negative impact on the production process. Therefore, for most non vacuum production environment, using active alumina desiccant to dry air is the first step to ensure smooth production. In today's industrial production, compressed air is an important power source. With its wide application, drying equipment for removing water vapor from compressed air has been developed and applied accordingly. Among them, the heatless regeneration adsorption type compressed air dryer is a kind of compressed air drying and purification equipment with large consumption at present because of its simple structure, low energy consumption, low investment and high gas dryness. The reason why it can effectively remove water is that the dryer with no heat regeneration absorbs water in the air according to the principle of pressure swing adsorption (PSA), and uses the balance of water vapor partial pressure between porous solid material surface (desiccant) and air, so as to obtain drier and cleaner gas with lower dew point temperature. Therefore, the selection of suitable desiccant is also an important part of the preparation work of the no heat regeneration device.
The excellent mechanical properties of activated alumina desiccant also play an important role in its application in non thermal regeneration device. When the activated alumina is added into the adsorption cylinder, it is often necessary to fill the adsorption cylinder to prevent the collision of the activated alumina in the adsorption cylinder, resulting in crushing and powder dropping, thus affecting the air inlet of the air compressor. Therefore, there are certain requirements for the compressive strength of activated alumina balls. It is generally required that its own strength is above 85, only in this way can it reach the normal service life, otherwise it will be used.
However, activated alumina desiccant is not only produced for drying, but also can absorb the vapor of lubricating oil from the polluted oxygen, hydrogen, carbon dioxide, natural gas, etc. It can be used as defluoridation agent for high fluorine drinking water, circulating alkane defluoridation agent in Alkylbenzene production, transformer oil deacidification regeneration agent, etc. At present, activated alumina has played an important role as desiccant and purifying agent in the electronic industry, such as gas drying, automatic instrument air drying, chemical fertilizer, iron and steel, petrochemical and other industries.