Oven design for drying carbon black after packaging
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Recently, there has been a project to convert used sea freight high-cube containers (dimensions: 40-foot container, length x width x height = 12.19 x 2.44 x 2.89 m) into ovens. The temperature inside the oven is set at 40–50°C, with saturated steam at 0.5 MPa or 1.0 MPa being used as the heat source; coils are installed inside the container, made of Φ89 seamless steel pipes, totaling approximately 60 meters in length. There are currently the following questions: 1. When products packaged in bags (usually in ton bags) are placed in an environment of 40–50°C, without the use of fans for forced air circulation, will the drying efficiency be too low?； 2. Φ89 seamless steel pipe, approximately 60 meters long – what is the required steam flow rate, depending on the desired heating temperature? What size should the pipe diameter be? Waiting online.
Drying it in a ton bag is certainly less efficient than doing it on a shelf; the surface area of the material is too small. It depends on the type of material and solvent used – for particularly volatile solvents, if drying time isn’t a concern, it might work after all. Drying is closely related to the properties of the material, and many parameters are required; therefore, calculating the drying process is actually a rather complex task. For DN80 pipes as well, using multiple small-diameter pipes is not more efficient; multiple small tubes offer a much larger heat exchange area, resulting in significantly better performance.