Utilization of Air Pressure For Biomass Drying

In the process of production of wood pellet and wood briquette, dryer has an important role due to regulate the moisture content before compacted (densification). Almost all wood pellet and wood briquette factories also use a dryer to keep the quality and quantity of the production. Today most of the drying of biomass using heat from combustion flue gas directly (direct heating) and a fraction using the heat of combustion indirectly (indirect heating). Of course the main concern is the issue of effectiveness and economics. Drum dryer or a rotary dryer is the most common type of dryer and popular because it proved capable of drying a large scale economically. Several types of dryers are also widely available and developed at this time with a variety of characteristics. The availability of a number of options also allow users or the industry to make their choice if they wish to withdraw and not fixated on one option only.

One type of dryer that started appearing on the market that take advantage of the heat of compression dryer (heat of compression type dryer). When the compressed air, more energy is converted into heat which is then stored in pressurized air (compressed air) and normally the heat is simply discharged in a cooler (cooler). At dryers that utilize hot air compression, the energy used to regenerate the desiccant, thereby eliminating the need for heating or heat is utilized directly in the drying. This type of dryer is also energy efficient than refrigerated air dryer type while the dew point is also much better than refrigerated type air dryer.