Introduction to Far-Infrared Dryers
Far-infrared dryers are energy-saving and drying products that use far-infrared radiation (2～20μm) to heat the surface of the material, thereby, effectively and quickly drying the product. Far-infrared dryers are usually applied on a variety of granular, paste and liquid materials, such as food, pharmaceuticals, chemicals, and so on. This article will introduce the application, principle, and classification of far-infrared dryers, as well as the benefits that they offer businesses.
Applications
Far-infrared dryers are widely used in food, pharmaceutical, chemical, agricultural and fishery and other industries. In the food industry, far-infrared dryers are used for drying and dehydration of vegetable, aquatic product, meat product and other food products. In the pharmaceutical industry, far-infrared dryers are used for drying the extract of the medicine and for drying and sterilizing components such as tablets, capsules and granules. In the chemical industry, far-infrared dryers are used for drying and melting of resins and adhesives, as well as for drying and curing coatings.
Principle
Far-infrared dryers use the far-infrared heating principle to heat the material’s surface, which then effectively and quickly evaporates the materials moisture. This method of drying uses far-infrared radiation to directly heat the surface of the material, which improves the heat transfer rate and effectively reduces energy consumption. This method of drying is also more efficient than traditional convection heat transfer drying, since far-infrared is able to penetrate the material, which leads to a small thermal inertia.
Classifications
Far-infrared dryers can be classified into three categories: dip type dryers, tunnel dryers and spray dryers.
Dip type dryers are applicable for high-speed surface heating of various fine particles and thin-film, thin-layer materials. This can be useful for products that should not be overheated, such as food and pharmaceuticals.
Tunnel type dryers are suitable for drying of large products or batches of products, and this type of dryers is typically used in industries that require rapid drying and sterilization of food, pharmaceuticals and chemicals.
Spray type dryers are suitable for drying of granular particle products and thin-layer film-type materials. This type of dryers is typically used in industries that require high speed and uniformity.
Benefits of Far-Infrared Dryers
Far-infrared dryers are energy efficient and the method of drying is fast, uniform, and precise. Other advantages include:
High-efficiency: Far-infrared dryers have high energy efficiency, since far-infrared energy can penetrate the material, which greatly improves the heat exchange rate.
Eco-friendly: Far-infrared dryers are eco-friendly, since there are no pollutants generated during the heating process.
Low Cost: Far-infrared dryers are cost-effective since they are energy-efficient and require less maintenance.
High capacity: Far-infrared dryers require less time to complete the drying process, which means they can handle higher production rates.
Conclusion
Far-infrared Dryers are energy-saving and drying products that use far-infrared radiation (2～20μm) to heat the surface of the material, thereby, effectively and quickly drying the product. They have been widely used in industries that require a rapid drying and sterilization process. Far-infrared dryers are energy efficient, eco-friendly, cost-effective and have a high capacity for production.
