industrial dryers

Industrial dryers, such as a continuous dryer, are crucial for the quality of the products

Industrial dryers are high-powered complex machines designed for the technological drying of the material. Durable equipment removes moisture from products, materials, machinery and mixtures. They are qualified to dry high volumes of products with immense control and precision. Industrial appliances are paramount in the pharmaceutical industry, insulation material production, sintering industry and wood processing. We can also find them in the asphalt concrete base production, metallurgical, automotive and paint industry. “Industrial dryers” is a term that describes a wide variety of machines, each of which has a unique and distinct operating system.

Most commonly manufactured to meet the need of specific industries include continuous, chamber, rotary, freeze and conveyor belt drying processes. Rotary, continuous, chain and chamber dryer use an assortment of mechanisms during the mass and heat transfer where the moisture is absorbed from wet materials. The absorbed water vaporises and is carried out through the inert gas or surrounding air. The drying procedure has multiple purposes and is often used to:

• Prevent the growth of moulds, bacteria and other microbes
• Enhance the usability, value and functionality of the materials
• Prepare materials for further handling, processing, storage or transportation
• Protect products from corrosion and rust

 

industrial dryers

Chamber, continuous and rotary dryer have distinct mechanisms that are perfect for diverse productions

Industrial dryers have distinct mechanisms to remove moisture. They come in various capacities, types, shapes and sizes. When buying the right equipment is necessary to consider how its features affect the performance and quality of the final product. They are all equipped with at least one airflow or ventilation system, fresh air supply, moisture derivation, transport and burner system. In a continuous dryer, the material travels through several zones where several chemical and physical processes take place. The even dryness of materials is achieved through proper temperature and moisture parameter control, which also prevents the surface from over-baking.

While a continuous dryer is perfect for larger productions, a chamber dryer is ideal for smaller, limited edition series. They are composed of a chamber entailing an air duct channel with an airflow vent, outlet channel, door, gas burner, moisture inlet, electrical enclosure with a panel and fresh air supply. In the procedure, products are loaded onto a cart and pushed into a chamber. While chamber drying equipment is suitable for large materials, a rotary dryer is perfect for delicate materials, such as mulch, chippings, balls and pallets. The heating can be executed indirectly with burners in the jacket or directly with the burner in the centre of the drum.

continuous dryer

3 things to consider when buying industrial dryers

They are essential for the quality of the products and need to be selected cautiously. They are a significant investment, but if chosen adequately can last a very long time. Before purchasing or custom-making, a machine has to be thoroughly researched and analysed. The main things you need to consider when buying a drying equipment are:

  1. Size
    Drying is a complicated procedure where attempting to dry a vast array of materials is proven to be tricky. The size of the material particles matters, and so does its density. They determine how long the process will last, and at which speed the items will move through the continuous dryer. Large particles have different drying needs as opposed to delicate materials.
  2. Production requirements
    Every production has different requirements, and the size of the drying system has to meet the production amounts. Undersized apparatus can slow down operations and cause substantial delays. A heavy-duty piece of equipment can be a central part of the production and timed to the need of the process or can be used when needed.
  3. Heat
    Each material reacts differently to heat. Its reaction determines the size of the chamber dryer, whether the heating should be direct or indirect and the amount of time the products are exposed to the high temperatures. When the temperature reaches a certain level, some materials may burn, melt, have a chemical reaction or even explode.

chamber dryer

How to achieve the best results using industrial dryers?

They can be tricky to use, however the key to the success is similar to one in nature – balance. That is why technical industrial dryers allow for different humidity levels depending on the temperature. This also allows for better quality products and fewer errors. Mistakes are often a reflection of the incorrect drying regime and unsuitable conditions. Cracks on the rough surface are the result of shrinking products. Damages, can be avoided by providing minimal differences in moisture along the depth product. The balance is maintained by the relative moisture in the chamber and changing temperature.

Deformation of the product surfaces is often caused by increased speed of drying. Discrepancies in the level of dryness between the products can be solved, by increasing the air supply along the whole surface of the drying shelf. It is also beneficial that the materials or products are placed as closely together in the continuous dryer as possible.

rotary dryer

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