Used dryer Selection Basics

Effect of different drying processes and the use of mathematical models to simulate commuted can easily find a variety of dryer performance at (downstream, upstream, cross-flow, Francis) different conditions and, therefore, relatively easy to calculate the conversion factor. Specific methods can be found in the "Computer simulation of the drying process of agricultural products" translated a book 5 hot air volume due to temperature changes caused by wind speed changes, so you must also consider the speed (air flow and temperature) conversion coefficient. Suggestions six pairs of grain drying converted standard (1) to strengthen international research study drying standards. In order to move closer to the international standard drying techniques, essential application of modern information technology and computer simulation methods, the international standard conventional drying technology 150 model series were converted dry conditions. Since the mathematical model more complicated, and there is no explanation and illustration, there are many factors need to discuss the selection equation and analysis, it would be difficult application. This requires foreign grain drying standards translate relevant information, collation, analysis and application. (2) to obtain the necessary test data. In order to verify the reasonableness and correctness conversion method, it is necessary to verify the results of the conversion, which requires certain test conditions and equipment for experimental verification, but also need to retrieve a lot of literature search. (3) the four conversion method were analyzed. Under different environmental conditions and food for the four different conversion method comparison and validation, to identify problems in translation, the first draft of proposed standards conversion. Dryer Selection Basics: Selection ① raw material shape of the particles, powders, particles, sludge, crystals, liquid, cream, suspensions, solutions, continuous sheet, plate, irregular material (small or large), sticky or lump like. ② average yield continuous operation quantity or finished products, the quantity or intermittent operation finished its adjustment range and so on. Availability ③ finished particle average particle diameter, particle size distribution, particle density, bulk density, rehydration and the like. ④ material inlet and outlet moisture dry, wet basis. ⑤ material properties of chemical, biochemical, microbial activity, heat-sensitive (melting point, glass transition temperature), moisture isotherm (equilibrium moisture content) and the like. ⑥ drying time drying curve, the impact of operating parameters. ⑦ heater form of exposure (direct, indirect). ⑧ fuel options steam, coal, electricity, oil, gas. ⑨ auxiliary equipment drying fan, dry dust, wet dust collector, the feeder, the feeder, finished cooling, and transportation devices. ⑩ special requirements of the constituent material, limit corrosive, toxic, non-hydrophilic solution, flammable, ignition point, color, texture, flavor requirements. ⑩ covers drying system drying equipment and ancillary equipment. Equipment installation and commissioning process and general requirements