Rotary Dryer

In terms of efficiency, lignite dryer is designed for processing high-humidity and high-viscosity materials. It adopts three-drum rotary drying method to keep the materials in the dryer for a longer time, so that the drying is more thorough. Compared with the old single-drum dryer, lignite dryer has a faster processing speed and 20% to 30% higher efficiency. For example, a medium-sized lignite dryer can process 200 to 300 tons of materials per day, while the traditional dryer of the same specification can only process 150 to 200 tons.

In terms of energy saving, lignite dryer introduces power-saving hot air furnace and heat recovery technology to greatly improve energy utilization efficiency. Traditional dryers waste a lot of heat during the heating process, while lignite dryers significantly reduce heat loss by optimizing airflow and material transmission routes. Specifically, lignite dryer consumes about 80 to 100 kWh of electricity for every ton of coal processed, while the old dryer requires 120 to 150 kWh of electricity, and the power saving effect is very obvious.

In terms of applicability, lignite dryers are more suitable for processing materials such as lignite with high moisture content and high viscosity. Ordinary dryers are suitable for drying granular, blocky or low-moisture materials. When processing high-humidity materials, they are prone to uneven drying or material adhesion. The lignite dryer has a special anti-adhesion design, which effectively prevents materials from clogging the machine or adhering to the equipment.

Adjust operating parameters: The operating parameters must be adjusted appropriately so that lignite can dry quickly. The rotation speed, feeding speed and hot air temperature of the dryer can be adjusted to allow the material to contact the hot air more fully and dry faster. For example, the feeding speed is generally controlled at 3-5 tons/hour, and the hot air temperature is between 600-800℃, so that the material can be evenly heated in a short time.

Secondly, upgrade the equipment: the drying efficiency can be improved by using efficient heat sources and energy-saving systems. Now many manufacturers have begun to use new high-efficiency burners and intelligent temperature control systems. These technologies can make better use of heat energy and save a lot of energy. For example, using the latest hot air furnace technology, the combustion efficiency can be increased by 10%-15%, and the energy consumption will naturally decrease. In addition, installing an automatic control system can monitor the equipment status in real time, reduce failures, and make the equipment last longer.

Finally, use a multi-stage drying system: For materials with high moisture content, single-stage drying may not be enough. With a multi-stage drying system, the moisture can be evaporated little by little in stages to avoid the material being hardened by heat at the beginning. For example, the surface moisture can be evaporated at a low temperature first, and then the internal moisture can be thoroughly dried at a high temperature. This not only dries faster, but also has better final product quality.

Small drying equipment is suitable for processing 10 to 30 tons of lignite, medium-sized equipment can process 100 to 300 tons, and large equipment can process 500 to 1,000 tons. Choosing the right equipment model according to actual production needs can effectively improve production efficiency and avoid overinvestment.

Secondly, the characteristics of the raw materials are also an important basis for selecting equipment. Lignite usually contains high moisture and a certain degree of viscosity, which requires the drying equipment to adapt to these characteristics.

For example, a three-drum dryer performs well when processing high-humidity materials because it can extend the residence time of the material in the equipment and improve the drying effect. In addition, ensuring that the equipment has an anti-sticking design can prevent the material from clogging during the drying process.