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Compressed air dryer desiccant – Activated Alumina Desiccants Beads

Compressed air dryer desiccant – Activated Alumina Desiccants Beads

To obtain air without moisture directly from the atmosphere to be used in industrial applications is almost impossible. If moisture remains untreated in the compressed air that is used in industries it could affect the performance of air used in the process and cause damage to machinery that is sensitive to moisture. This article outlines the advantages of using desiccant dryers in industrial air drying processes.

The atmosphere is awash with water vapour in high temperatures and lower temperatures. In the summer months, the conditions in the Middle East especially the coastal region like the UAE is extremely humid and hot, with temperatures that exceed 43 degrees Celsius (109 degrees Fahrenheit) and humidity that is at over 90 per cent. This has a profound effect on the amount of water present as the atmosphere is compressed. Disruptions and problems like corrosion of pipes could result from water vaporization in pipes and the equipment that is connected. To prevent this from happening it is essential that the compressed air be dried.

Deciding on the best dryer to deal with wet compressed air is dependent on the demands and tolerance levels of the equipment that makes use of compressed air. There are a variety of air dryers on the market but one of the most utilized for applications that require a lot of attention for the Middle East region is a desiccant air dryer.

What is the Desiccant Dryer?

A desiccant dryer, also known as an absorption dryer, is a type of industrial equipment which makes use of desiccant substances to remove all water in the air that passes through it. A typical desiccant dryer utilizes a two-tower configuration for a continuous air-drying cycle.

What does it mean by a Regenerative Desiccant air Dryer?

"Regenerative" is a term used to describe a "regenerative" is used to describe an industrial desiccant dryer that can renew its desiccant by reversed adsorptive processes. Regenerative dryers typically are equipped with towers packed with desiccant that allow water absorption and material regeneration to happen simultaneously.

Twin Tower Compressed Air Dryers

Desiccant dryers with twin towers are dual desiccant dryers that continually switch between absorptive as well as regenerative modes. Indicators determine the degree of saturation of the water in each tower and automatically switch to regenerative mode as needed.

It's the Ideal Method for Compressed Air Drying

Utilizing the highest-quality activated alumina desiccant by Ingersoll Rand gives you better control over the conditions of your system, such as temperature, pressure, and levels of moisture. It also assists in achieving low-pressure dew points that range from -40degF up to 100degF (-40degC from -70degC) ensuring the most dry and clean air and maximizing the performance of equipment and the life of your equipment.

How Does Activated Alumina Function Within an Air Dryer?

The adsorbent, which is the principal component of the air dryer, is subjected to constant pressure as well as water vapour and heat shocks. These can easily result in mechanical failure as well as medium defacement. This reduces the effectiveness of the adsorbent. Because activated alumina replaces silica gel as the primary adsorbent, a variety of properties including constrictive strength as well as resistance to water absorption are greatly improved to a superior degree if there is no "renewable energy use" and other related activities occur. Certain aspects like activated alumina treatment and compressed air's dew point, stability of the temperature of -40 degrees Celsius, and a time-to-life of three to two years are all guaranteed in the process.

Compressed air that comes from the rear of the compressor is a type of supersaturated compressed air which contains condensate. The dryer is not influenced by a tiny amount of condensate. If a gas water divider and filter are not installed on top of the dryer or if a significant amount of condensate water enters the adsorption tower due to unintentional causes the adsorption can decrease and the temperature of the dew point will increase dramatically. The adsorbent may disintegrate into powder in extreme conditions, leading to dust being discharged from the muffler or obstruction of the dirt filter in the rear, in addition to the requirement of replacing the adsorbent.

In dryers using compressed air 1/8 inch (2-5 millimetre) activated alumina beads is the most utilized. The 1/4" (5-10 millimetre) activated alumina is commonly used as a pre-bed to support large desiccant beds or as a buffer in silica gel bedding. The 3/16 (3-5 mm) (5-10 5-10 mm) beads are used for situations where the pressure drop or surface requirements are between 1/8 or 1/4'' materials.

Active Alumina Desiccant Features

  • The beads are uniform and smooth: minimize pressure drop and ensure that the entire desiccant bed.
  • Abrasive-resistant: reduces dusting during loading, transport, and service life. Reduces pressure drop.
  • Strength of High Crush to allow for faster tower load and efficient use of desiccant.
  • Large capacity for adsorptive Reduces the initial cost as well as operating expenses and energy consumption.
  • Long-term service duration provides longer service intervals, ranging from 2 to 5 years.
  • Dusting is low and prolongs the service intervals The dryer's filter prevents its after-filter from getting blocked and delivers better-quality, clean air.

When do I have to replace the Desiccant?

Desiccant lifespan varies based on the use. The greater the humidity and flow within your dryer the more frequently your desiccant must be replaced. Here are a few indicators to help you determine when you should change the desiccant beads inside your dryer.

  • The desiccant beads are coated with oil which makes them ineffective at effectively adsorbing water.
  • The presence of oils or contaminants in the dryer.
  • The desiccant appears discoloured.

Desiccant tests are advised every six months as a part of the routine maintenance.

But, as the activated alumina builds up water as time passes, it eventually reaches an equilibrium point. Regeneration is required to maintain the efficiency for the desiccant. Regeneration typically involves redirecting some of the dry air from drying towards the desiccant bedding or using direct heat to remove the water away from the particles. The Activated Alumina is distinguished by the ability to undergo multiple regeneration cycles, making it a more economical option for drying compressed air systems.

Each method of air drying has each method's benefits and is according to criteria like the necessary dew point and the volume of air that requires drying, energy considerations and the requirements specific to an industry. Whatever the method the importance of drying compressed air for the compressed air system, in conjunction with the importance of activated alumina's part to this procedure, can't be overstated.

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