Fiberglass drying bed

A fiberglass drying bed is a device that uses a drying medium to fluidize granular materials for drying. It features high heat exchange efficiency, uniform drying, and a high degree of automation. It is suitable for loose granular materials, especially heat-sensitive materials. The particle size of the material to be dried is subject to certain limitations; generally, it is preferable to be greater than 30μm and less than 6mm. When drying a mixture of several materials, their relative densities should be close. Materials with excessive moisture content and a tendency to agglomerate are not suitable. In the production of refractory materials in China, it is used to dry Al2O3-C and Al2O3-ZrO2-C material particles. This equipment is operated intermittently, with each cycle including feeding, drying, and discharging, taking approximately 40-50 minutes. It can also achieve automatic continuous operation of feeding, drying, and discharging.

High-temperature gas with a certain velocity passes through the plate holes under the sieve plate. Its flow rate slightly exceeds the critical fluidization velocity, causing the particles of the bed material to be intensely agitated and displaced, resulting in irregular movement and the formation of a mixed bed of material particles and gas. The gas and solid phases are in good contact, with many opportunities for surface renewal, enhancing the heat and mass transfer between the two phases. The temperature is uniform within the bed, heat transfer is rapid, and drying efficiency is high. After drying, cooler air is passed under the sieve plate at a higher velocity to cool the material, which is then discharged with the airflow. The dust carried by the dried gas is separated by a dust collector and discharged by a fan.

Fiberglass, also known as GFRP (Glass Fiber Reinforced Plastic), generally refers to reinforced plastics using glass fiber to reinforce unsaturated polyester, epoxy resin, and phenolic resin matrices. Glass fiber or its products are used as reinforcing materials, hence the term glass fiber reinforced plastic, or fiberglass. This is different from tempered glass.
Due to the different types of resins used, there are polyester fiberglass, epoxy fiberglass, and phenolic fiberglass. They are lightweight and hard, non-conductive, stable in performance, have high mechanical strength, have low recyclability, and are corrosion-resistant. They can replace steel in manufacturing machine parts and the outer shells of automobiles and ships.
Fiberglass, formally known as fiber-reinforced plastic, is commonly called FRP (Fiber Reinforced Plastics), which refers to fiber-reinforced composite plastics. Depending on the type of fiber used, it is classified into glass fiber-reinforced composite plastic (GFRP), carbon fiber-reinforced composite plastic (CFRP), boron fiber-reinforced composite plastic, etc. It is a composite material using glass fiber and its products (glass cloth, tape, felt, yarn, etc.) as reinforcing material and synthetic resin as the matrix material. Fiber-reinforced composite materials consist of reinforcing fibers and a matrix. The diameter of the fibers (or whiskers) is very small, generally below 10μm, with fewer and smaller defects. The fracture strain is within about 0.3%, and it is a brittle material that is easily damaged, fractured, and corroded. Compared to the fibers, the matrix has much lower strength and modulus but can withstand large strains and often exhibits viscoelasticity and elastoplasticity; it is a ductile material.