Mar. 15, 2022
Activated alumina has strong adsorption capacity for many liquids, so people often use it for adsorption and dehydration in some places. The adsorber must ensure its surface is dry before use so as to achieve good drying effect. Yamtop introduces its working principle for you.
1、The dehydration principle is used for low dew point occasions, the dew point depth can reach -60℃, to ensure that the water content is below 3ppm.
2、Due to the cyclic change of temperature and pressure during the regeneration of alumina adsorption, the design and manufacturing requirements of activated alumina dryer will be very strict, so the machine cost is higher.
3、After running for a period of time, the outlet gas often carries dust, we can use multi-filter dust collector to purify the gas.
4、Gas enters the filter element from the outer surface, impurities are blocked on the surface and inside of the filter body, and a uniform layer of filter cake is formed on the surface of the filter element. Due to its own bridging effect, the filtering precision is further improved.
5、In the production practice, the factory technicians can decide the replacement frequency of the cartridge according to the gas condition and the length of running time.
6、In the case of batch use in industrial production, people can choose to use the adsorber and only need to replace the cartridge at a later stage.
7、In industry, in addition to being used as a desiccant with strong adsorption capacity, activated alumina can also be used as a fluoride remover, arsenic remover and variable pressure adsorption adsorbent in water treatment.
Activated alumina is tasteless, insoluble in water, and can be used as a desiccant, but has a short shelf life. We can take some measures to prolong the shelf life.
1、Control the concentration of K2CO3 solution in the drying tower. When caustic soda is prepared or steamed, control the concentration of caustic soda.
2、Strictly control the feeding material. People should ask for long-term immersion in water and working solution without softening and chalking, which is a prerequisite for its normal function.
3, the use of activated alumina high strength, not easy to break the characteristics of the product we will be used in the sun exposure, so that the water stored in it evaporates, crystallization and then continue to use.
4, control the temperature: the temperature should be controlled at 40-55 ℃, and we need to preheat the working fluid in advance during the working fluid circulation.
5、People can use sodium hydroxide solution or aluminum sulfate solution to clean the activated alumina, so that the desiccant can be regenerated to some extent, restore the adsorption performance and extend the shelf life.
6、People should strictly control many factors that affect the chemical reaction of the hydroxide process to minimize the generation of degradation substances, reduce the burden of regeneration of the clay layer and extend the shelf life.
YAMTOP Activated Alumina, it has high strength, low abrasion, no soften in water, no expansion, no powdery no crack. It can widely used in the deep drying of cracked gas, ethylene and propylene, hydrogen-generation, air separation, instrument air drying and fluorine treatment for H2O2, also in the absorbing pollution material, such as H2S, SO2, HF and paraffin in the waste gas, especially in the drinking water defluorination.
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