The purpose of the desiccant is to adsorb the water molecules from the environment and consequently dry the air. That is why it is a superb defense against moisture. But on the other hand, moisture can corrode many metal things and damage many non-metal things. Hence, getting rid of the moisture is crucial to keep your things functioning smoothly.
Activated alumina is also a type of desiccant. It is very effective because it traps moisture in the air and keeps the surroundings dry.
What is Activated Alumina?
Activated alumina are desiccants that have high permeability. It has been squashed at multiple levels, so despite its small size, it has excellent adsorption capacity. They are multi-purpose because of their versatile nature. They can be used with dry gasses. The dry gasses are often required to transfer the vapor gasses safely. Several industrial sectors are used as a drying agent to clean and dry that place successfully.
How Does an Air Dryer Work?
The desiccant dryer has desiccant contained in single or more vessels. The internal parts of the dryer are used to keep the desiccant in a particular position. The internal parts consist of screens, trays, and sheets, which permit air circulation through the vessel without interrupting the position of the desiccant. The air enters the vessel from the bottom and exits from the top surface. The desiccant reaches its full capacity as air enters and leaves. After some time, this degrades the moisture-adsorbing nature of the desiccant. At this point, a regeneration process is carried out to restore its efficiency.
The air dryer has an adsorbent, which is present in the main section. It is exposed to several things simultaneously, such as recurrent pressure, water vapors, and heat. This all can lead to machine failure or somewhat mild destruction. In addition, it gradually degrades the efficiency of the adsorbent.
When activated alumina is switched in the place of silica gel as the main adsorbent, The efficiency of the machine increases. It is because activated alumina possesses high strength and has better capability to resist water. In addition, the activated alumina has special compressed air moisture stability of around -40 °C. It also runs long and can serve for two to three years.
The compressed air from the rear of the compressor has a kind of high moisturized compressed air. Because the dryer has a low quantity of condensate, it does not have much power. If a small amount of condensed water pierces the adsorption tower for any reason, the adsorption rate of the dryer will drop. So, it is very important to check the position of the gas-water divider and filter in the right place. Any inappropriate situation can disturb the dew point and increase its value. If the situation worsens and the adsorbent breaks down, there will be a complete powder discharge from the muffler. It can also block the dirt filter on the rear side. In that case, replacement is a must.
The adsorbent of the dryer has the property of a non-thermal conductor. It means that the heat cannot be spread in a series by the microporous water, while in the adsorption tower, there is already a significant amount of condensed water. When there is powerful heat, the water naturally evaporates into its gas form. This process causes the adsorbent to expand. For this reason, only the water-gas separating machine should be placed in front of the adsorption of the dryer.
The activated alumina has a strong, resilient ability against the alkaline components. The alkaline components are Ammonia, Amines, and other organics, which have a high basicity level. It is also a strong opponent against moisture or water molecules. It is also a convenient choice for heat-restored dryers because of its versatile quality. It is also a pocket-friendly transaction.
Contrarily, the activated alumina has its disadvantages too. It is vulnerable to long-chain hydrocarbons; they are heavy and strong. For example, the activated alumina is defenseless against air compressor oil vapors. These hydrocarbons accumulate on the surface of the alumina and block its porosity method. This lowers the water or moisture adsorption capability of activated alumina.
You have to take some precautions and see that Activated alumina is the best choice to go with. Sorbead is the leading company as a qualified manufacturer and supplier of activated alumina worldwide. We are recognized because of our customer satisfaction and meeting the market standard. Contact us now!
Air drying is the process of removing water content or moisture from the air to keep it humid-free. Air surrounding or trapped within pieces of equipment or products have to be maintained moisture-free to prevent any damages. There are many different ways to keep air dry from moisture. Desiccants are widely used for the air-drying process. A variety of drying desiccants are available. Among them, we will discuss activated alumina, which is the best air drying desiccant.
What is activated alumina?
Activated alumina is a derivative of aluminium oxide, which is produced by processing aluminium oxide at an elevated temperature. The basic characteristics of activated alumina are that it is a porous solid form of aluminium oxide which is odorless, non-toxic, tasteless, and insoluble in water. These properties make it a perfect desiccant for air drying and water purification.
Benefits of activated alumina balls
Activated alumina balls are widely used as an air drying agent. These balls hold many characteristics which will prove that activated alumina is the best air drying desiccant. Let's view them in detail.
These features ensure the choice of activated alumina for air drying as the best.
The dihydroxylation process produces activated alumina from aluminum hydroxide to give a porous solid object. These are widely used as desiccants and filters for water purification.
Natural drinking water contains many minerals like fluoride, arsenic, selenium, etc. These minerals are the reasons for considering water as a precious part of our diet and good health. But if any of these minerals exceed the permitted limit, it can lead to severe health issues. Thus, the purification of water is highly recommended. In this article, we will see the role of activated alumina in water treatment.
Water purification by activated alumina
The principle works in removing arsenic content by the activated alumina bed. Known as adsorption. The arsenic content in water may rise beyond the permissible boundaries due to deposits from industries, agricultural processes, or even through natural means. When in huge quantities, this will cause many health issues.
The water to be treated is allowed to pass through a bed of activated alumina under high pressure. More than one filter bed can be used back to back for improved results. The arsenic content gets adsorbed by activated alumina beds when passed continuously for a pre-determined time, and the processed water is collected for further use.
The quality of the activated alumina arsenic removal process depends on certain water factors under treatment, such as pH, water quality, presence of other impurities, and compound form of arsenic. Arsenic can be present in two forms, As (V) (arsenate) and As (III) (arsenite). It is recommended to process the water before it is passed through an activated alumina bed and oxidize the As (III) to As (V) because the alumina filter handles As (V) more efficiently. Also, the pH range of water is to be maintained within 5.0 to 6.0 for smooth and maximum adsorption.
One main benefit of using activated alumina for water treatment is that it is resistant to liquid water. This means it will not shrink, swell or get diluted when immersed in water for a long time. The activated alumina beds can be regenerated and reused. The high surface area and high adsorption capacity place the activated alumina as one of the best methods for water purification.
Being one of the prime Activated alumina balls manufacturers, Sorbead India offers high-quality products at affordable prices around the globe. Contact us for more information.
Desiccants are said to those substances which can absorb moisture and odor. Having excellent absorption capacity, it can maintain the product's originality by preventing any microbial activities. Although moisture is present everywhere, its presence is unnecessary places can be quite disastrous. Most of the desiccants are available in granular or powdered form. The reason that these desiccants are in this form is that in this way, it gets more surface area for absorption. This form allows the desiccant to absorb more moisture content from the atmosphere. However, these desiccants cannot be used loosely, so they are used in packets. Now the size of the packets depends on the requirement. You must have seen small packets of desiccants in leather jackets and plastic containers. While at the same time, huge bags of desiccants are also used while transporting that cargo on a ship.
There is various type of air drying desiccants available in the market. The most popular and widely used desiccant is silica gel. It also comes in three variants that are orange, white, and blue. Among the three, orange and blue are the color-changing gel. After absorbing moisture, the granules change their color, indicating that the desiccant granule is contaminated and needs to be replaced. Another reason which makes it more popular is that once it is fully contaminated, it can be reused again by heating it over 300oC. The other type of desiccant is molecular sieves. Its properties are quite similar to that of silica gel. The advantage of using it over other desiccants is that its absorption speed is more, and it has more resistance to contamination.
Apart from this, there are other desiccates like activated carbon and clay. So desiccants can either be used alone or in combination with the other ones. In this way, we can get rid of two factors at a time that is moisture and odor. For example, silica gel and activated carbon can be used where silica gel can absorb moisture, and activated carbon can absorb odor. Clay is said to be a natural desiccant. It is said to be the most efficient and cost-effective desiccant. One drawback of this desiccant is that it needs to be replaced immediately after it is contaminated.
Sorbead India is the manufacturer and supplier of alumina balls desiccant for the industrial air-drying process. Air drying desiccants are used for compressed air drying, heated & heatless air drying, etc.
Activated alumina balls are not only a bad conductor of electricity but have a good capacity to resist heat for a long duration. Its rigidity is that the alumina molecules are very close to each other; thus, its density is quite high. And this is the reason the most common shape given to alumina is in the form of balls. The external surface of the alumina ball is quoted with such a solution so that it can easily reflect sunlight avoiding any reaction. Alumina balls manufacturer designs the surface of the balls smooth, which makes it idle to use in various grinding processes. Apart from this, it is also used for filtration purposes. It is also used to abstract minerals from ores by making them highly porous. These white coloured balls are usually combined with the latest technology to ensure their flawlessness.
Being the fourth utility of a production facility (the other three being electricity, water and gas) compressed air is a very important resource that should be carefully treated in any manufacturing plant. It should be carefully examined in a periodical manner. The moisture present in the air should be removed and also the contaminants should be eliminated. This will result in the efficient working of the whole system. Improved performance and reduced operational costs are two major perks of having efficient air and gas drying systems.
Air drying is one of the most significant processes carried out in most large industries. In this technique, the moisture from coatings and surfaces are removed by using hot, dry or forced air. Moisture present in the air can affect colour, coatings etc., and also lead to damage and corrosion. But air-drying is employed to prevent all those problems.
Significance of compressed air and gas drying
Regular atmospheric air and compressed air all contain some amount of water vapour. This water vapour will cause problems in future because of an increase in water concentration in the system. Therefore, to prevent problems in the future, wet air must be controlled. Drying equipment can be used for the same purpose.
There is moisture present in the irregular atmospheric air that will have moisture content. When the air or gas crosses the saturation point, this vapour will condense and reach the liquid state. This process happens at a certain temperature and this temperature is known as the dew point.
When the compressed air employed in the manufacturing plant contains moisture, it will damage various valves, pneumatic air systems, air motors, different passages etc. They will cause damages, wear and tear, impact lubrication, corrosion, causes the valves and passages to be plugged and clogged and also affects the overall functioning of the system. Further, the moisture harms the adherence, colour and finish of paint etc. Hence, they- lead to malfunctioning, false readings in the instruments, faulty operations, and even cause the total system to shut down.
Compressed air and gas drying becomes necessary to obtain perfectly finished products, for the smooth flow of uninterrupted production, improved performance of the whole system and reduced operating costs.
Air is required in most manufacturing facilities or plants. Most of these plants need dry and clean compressed air for the smooth flow of their operations. Water molecules, dirt or any other contaminants will be deposited inside the pieces of equipment that can even lead to a drop in the pressure of the system. This drop indicates low efficiency in the overall performance of the system.
In these pieces of equipment, dry and moisture-free air is needed, as even a little amount of moisture or water vapour can produce significant issues. This may plug the air passages and block them. Further, they can lead to instrument damage. Pneumatic thermostats that are used in the air conditioning and heating cycles of buildings is another instrument that needs dry air.
These types of instruments used in sewage treatment units, manufacturing plants, textile manufacturing units, petrochemical plants are all examples of facilities that need dry air for their smooth flow and efficient operation.
The slime or sludge that is formed by the dirt and contaminants or oil in the air causes blockages in valves and acts as drags in the cylinders. This causes damages and results in frequent maintenance. There will be a lag in operations, this slowdown of operations will gradually lead to the shutting down of the system. The efficiency will be very low and there will be an increase in costs too.
These are the main reasons why compressed air and gas need drying. Air-gas drying can be achieved through various techniques. Use of air dryers is one popular technique used nowadays and among them, use of desiccant air dryers is the one with most demand as it employs a heatless method.
The regenerative desiccant air dryers use a desiccant. Activated alumina balls are used mainly in these systems nowadays. These desiccants absorb all moisture content from the air. They have the maximum water adsorption capacity than other adsorbents including silica gel and molecular sieves. Activated alumina balls are exceptional adsorbents of water vapour and moisture. They are highly porous non-toxic substances with high surface area. Sorbead India is one of the most reliable suppliers of high-quality activated alumina balls in India. They provide activated alumina balls of different sizes and types for different types of air dryers.
Air compression involves making the molecules come closer, and thus force them to fit into a smaller space. This process involves an increase in temperature and is known as the heat of compression. In any air compressor or compression air dryer, this same process is involved and thus results in a lot of heat emission. It is dangerous to leave the heat emitted unattended because it can easily overheat the compressor and can result in an explosion.
Activated alumina balls as the drying medium in a heatless compression air dryer is the best choice to avoid this overheating of the compressor. Let’s look at the heatless compressed air dryer.
Heatless compressed Air dryer
By using activated alumina for the air dryers, we can devise the heatless compressed air desiccant dryer. A dual-chambered arrangement filled with desiccants is aligned to adsorb the water molecules from compressed air. The final output would be hot dry air. The heat of adsorption is retained by the desiccant balls and is prevented from being accumulated at the chamber outlet. This heat is further used for regeneration in the subsequent cycle to nullify the heat accumulation. Effective heat retention, a dense medium of high volumetric heat capacity can be introduced at the end of the adsorption chamber.
But this process consumes a portion of the dry air output from a compressed air dryer. The amount of this consumption can be reduced by the below methods:
There are majorly two types of desiccant air dryers which are pressure swing compressed air dryers and externally heated compressed air dryers. The pressure swing regenerative dryers and the high-pressure swing dryers are efficient in reducing the accumulated heat from the entire system. These regenerative dryers make use of the adsorption heat energy retention concept to maintain the heat of compression within limits.
Air drying desiccant balls
The best air dryer desiccant beads in use are activated alumina. It is very important to keep compressed air free of moisture because moist compressed air can cause various damages to the compressor. The valves, motors, and insulations can be affected, the final product can be altered, rusting and corrosion, damage to pipes, total blockage of the system are some examples of the adverse effects of moisture content in the compressed air. So, it is very important to maintain the PDP of a compressor system as low as -40 degrees centigrade.
Regeneration dryers that involve activated alumina balls as adsorbents have doubtlessly proven to be highly efficient and effective. Activated alumina uses the concept of adsorption to trap water molecules that come in contact with the desiccant surface. With no chemical or thermal reactions involved, the use of desiccant air dryer beads is of low operating and maintenance cost. Activated alumina balls are non-toxic, colorless, tasteless, and insoluble, and have high thermal and mechanical strength.
The ease of regeneration of activated alumina balls is a highly recommendable feature. Activated alumina balls in the desorption chamber of the dryer are triggered to action as they saturate with the moisture content from the compressed air. It does not require any additional systems involved and in the context of heatless air compressor dryers, this regeneration phase helps to reduce the heat retained during the adsorption.
Sorbead India is one of the leading manufacturer of activated alumina balls over the years. The quality of desiccant balls, a wide range of quantities available, and easy access to products has helped us remain your trusted partner in all kinds of desiccant requirements. Our heatless compressor air dryer desiccant balls have proven to be highly efficient.