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A belt dryer is a machine used in manufacturing to thermally treat and dry products, commonly used in plastic, wood, and chemical industries. It uses air or gas to dry pastes, cakes, and pellets and can be configured in different ways. The wet product enters through the feed head and travels on a perforated belt to the drying area, where heated air flows. Different sections of the dryer can have different temperatures and airflow settings. Belt dryers can dry a variety of materials, including wood products, granulated feed, vegetables, and medical materials.
A belt dryer is a piece of machinery used for continuous drying in manufacturing industries. Designed to thermally treat a product, it allows the raw materials to be dried in a controlled manner. It is widely used in plastic, wood and chemical industries. Pharmaceuticals, food and building materials are some other areas using this heavy machinery.
The device uses air or gas to dry and cool pastes, cakes and pellets. It is built in a modular way, which allows for many different configurations. Some of the types of dryers that can be built are multilevel dryers, multistage dryers, and multibelt dryers. Single belt dryers can also be found. The modular construction allows it to be easily integrated with other high temperature drying processes.
A typical belt dryer consists of an inlet end called a feed head, a conveying mode which is primarily a conveyor belt, and a discharge end. The wet product to be dried enters the dryer through the infeed head and begins its journey on a perforated belt. The feed head may be different for various types of wet products. For example, a rotary belt conveyor is used for sensitive products, while a pellet mill is used to feed products such as filter cake. Distribution spirals, plate feed devices, swing belts and swing arm devices are some other input mechanisms.
The product is transported by the conveyor belt to the drying area, where dry, heated air flows. The air or gas absorbs the water from the material, drying it as a result. The moist and drying air is expelled with the help of fans and the dried material leaves the dryer at the end of the belt.
The drying area can be divided into several sections, each equipped with its own heat exchanger and ventilation fan. This allows for different drying and cooling temperatures to be maintained in different sections of the belt dryer. Both the airflow in each section and the speed of the conveyor belt can be varied, allowing for different settings for the drying time. It is also possible to circulate the drying air over or through the product depending on the material. The air is circulated from top to bottom or vice versa so that the material dries evenly.
In addition to hot air, steam, hot water and oil can be used as heating media in a belt dryer. In addition to solid products, materials in the form of granules or strips can also be dried. Some advanced models of belt dryers are also equipped with control panels with touch screen models. This allows for various drying parameters to be stored as ‘recipes’, making the belt dryer very easy to use.
Used to dry materials such as paints, grains, molding materials and biomass, belt dryers can also easily dry wood products, granulated feed and vegetables. Super absorbent polymers, propylene fibers and plastic products are some other materials that can be dried with a belt dryer. The tool can also dry materials such as fruit, synthetic rubber or medical material.
