Rotary Drum Dryer: Cost-Effective Way to Process Biomass Waste

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Biomass drying is a vital process in the production of high-density pellets, briquettes, and gasification. It is the sustainable energy source that reduces the co2 emissions in the environment. Everyday million tonnes of biomass like wood chips, forestry harvesting residues, sawdust, agro-residues from grain, sugarcane bagasse, etc. gets generated in India.

Rotary Drum Dryer machines are capable of handling organic raw materials in bulk. They have been used for a long time in drying the biomass waste because the dry biomass lowers the cost of transportation, handling, and transformation.

Why Biomass Drying is Vital?

Biomass usually has a high moisture content (i.e., 50 to 63 percent) depending on the weather, season, and type of biomass. The moisture level in the biomass is the essential key parameter that affects the pellet quality. Just remember that if the material is too wet, the pellets and briquettes easily break.

However, if the raw material to excessively dry, the pellets do not form. When the moisture level surpasses 16 percent, the quality begins to suffer. Therefore, when the moisture content gets lowered to 10 to 15 percent, the energy density, i.e., the calorific value of the biomass doubles, i.e. 4.5 kWh per kg.

In fact, the drying process makes sure that there are lowered emissions during the combustion of biomass and also reduces the amount of biomass used during the burning. The other benefits of dry biomass include increased boiler efficiency and enhanced boiler operations.

What is Biomass Rotary Drum Dryer?

Rotary Drum Dryer is a machine that helps to lower the moisture level in the biomass materials such as coffee husk, sawdust, wood shavings, etc. They are used widely in the big scale bio-energy plants.

How Does it Work?

Rotary Drum Dryer consists of the main body, feeding system, ducting system, and collector system. It uses a rotating cylindrical drum that acts as a container for the uniform transfer of the thermal energy from the hot gas stream to the moisture-laden raw material. The wet product is fed into the inlet of the drum where it is dried well.

The damp material is then turned inside the cylinder and distributed uniformly in the dryer. It then comes in contact with the hot air, and this process continues till the material gets dried thoroughly. During this process, the moisture level in the pellets is near about 13 to 15 percent, and that of the briquettes is about 11 to 12 percent.

Features:

The best part of the Rotary Drum Dryers is that they are less sensitive to the particle size and have minimal maintenance. The sturdy and simple construction blends the reliability with flexibility, thus enabling them to run under the most challenging conditions.

They are typically built using high-quality standards are usually long-lasting. These machines have high operational flexibility, broad application range, less repair cost, and convenient maintenance. The Rotary Drum Dryer machines also act as the best replacement of the industrial dryers.

Today you will find various models depending on the moisture levels and production demands. Thus, you can buy the dryer suitable as per the unique processing requirements of your material.

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