Compressed air can be used by a variety of groups, ranging from industrial outlets to smaller commercial venues. Air compression is a process that takes air from the nearby environment and pressurizes it. Expanding that compressed air produces energy. One of the problems with this process is that everything in the air is compressed, including any unwanted materials like dirt or water. Condensation is one of the biggest problems a compressor system will face. Any water carried in the air is also compressed. This water can condense and collect at various points in the system. This excess water can cause significant damage to equipment or product if not removed.
One of the best ways to deal with condensate is to use industrial air dryers. Two common types of these are desiccant dryers and refrigerated dryers. These components remove any water from the air compressor system, and are necessary parts of the system. Some of the complications air dryers help prevent include corrosion, freezing, and tainting the air supply. All these things may damage the system or product, and cost businesses a great deal of time and money.
The refrigerated air dryer is a type of dryer that cools the air supply to approximately 38 degrees Fahrenheit, at which point water vapor is condensed to a liquid and can be expelled from the system. This is all done in a contained environment.
There is a variety of refrigerated air drying systems. Cycling refrigerated dryers turn on in response to detected loads. These may use a multiple-stage heat exchanging method. Non-cycling refrigerated drying systems use a dual-stage heat exchanging system. To prevent freeze-ups and keep a constant temperature throughout the drying system a hot gas bypass valve is used on the refrigeration side.
Another kind of air dryer is the desiccant dryer. This type of dryer pushes the air through a system of highly absorbent desiccants. As a result of this method, any moisture that is in the air gets sucked up and removed. Desiccant dryers can remove more moisture and produce dew points below freezing. A percentage of inlet compressed air is used to “purge” the moisture, regenerating the desiccant.
There are also several types of desiccant dryers. Heated purge uses an external blower and heater to dryer off line desiccant bed. Heatless purge systems use compressed air to remove excess moisture from desiccants once they are saturated, and constantly cycle through wet and dry sets.
Since they remove harmful condensate, air dryers help dramatically increase the efficiency and lifetime of compressed air systems. They also allow regulation of the air, ensuring that the air in your system is clean. Digital controls and sensors (dew point monitors can be built into air dryer systems providing quick easy indication of moisture content. These recent advances allow more contaminants to be removed than ever before, ensuring that all industries using compressor systems have the driest air available. Whether they are desiccant or refrigerated, dryers are sure to be a great addition to your system.