High Temperature Fluid Bed Conveyor
The client needed a method for transporting hot, powdery material in a nearly horizontal direction for an industrial application. This project presented multiple technical challenges. First, the material temperature could reach 1000 ºC, exceeding the limits of available solutions. Second, the material is fairly abrasive. Third, if allowed to remain stagnant, this material quickly cakes together and hardens. Compounding the issue, process upsets could result in lumps and/or excessive material rushing into the system. The surrounding equipment runs continuously and demands high reliability. Plugging or other unexpected shutdowns are not acceptable.
These challenges were met by an innovative fluid bed transport system with a multi-layered air distributors. Through fluidization, the material is aerated, eliminating the opportunity for caking or lump formation. A unique air distributor meets the other technical challenges. The upper layer is a porous ceramic plate. This design element is capable of withstanding the abrasive, high temperature material. In addition, the smooth ceramic surface allows unobstructed passage of lumps or material rushes due to upstream process upsets. The middle and lower distributor layers insulate and support these plates, guarding against thermal shock.
United States Patent 7553111 was awarded for this design.