Sugar beet pulp dryer, which is also named impeller mixing rotary drum drier, rake roller dryer, rotary rake drum dryer, rotary paddle roller dryer. It is specifically designed according to the problems of the traditional rotary dryer which is not suitable for high-moisture materials that MC is higher than 50% and the viscosity is relatively low. Meanwhile, since the ‘black hole’ phenomenon occurring in the drum lowers the drying capacity and raises the energy consumption, the paddle rotary dryer sets high-speed spinning paddles, strengthening the crushing and separating function. The crushing effect enlarges the contact surface of particles, which largely increase the heat transfer rate and vaporization rate. According to the practical test, the unit vaporization capacity per hour of paddle rotary dryer is as much as 25-60kg/m2, which is 1-2 times of traditional rotary dryer. The output is raised by 50% and fuel consumption is reduced by 30%. At the same time, the footprint and drying efficiency is raised by 40%. It is applicable for the drying process of high-moisture materials with 50%-85% moisture, such as sugar beet pulp, sludge, bean dregs, starch residue, and sauce residue, spray corn bran, cassava dregs, brewer's grains, distiller's grains, straw, grass, organic fertilizer, chicken beef feces. We also help optimize the drying process according to the property of different biomass materials, production scale, application requirements, cost control, automation level, and site condition.
Material Flow: the raw material with 80-85% moisture will be sent into the dewatering machine, and then the moisture will be reduced to 60-65%, then feed into the dryer by screw conveyor, concurrent flow drying. Under the effect of the inner shoveling plate, materials are taken and scattered constantly, and move in a spiral forward method. Through three layers (inner, middle and outer layer), heat exchange is realized between material and hot air medium. The materials that achieve the drying effect move forward fast and are discharged out of the roller. Wet materials that still don’t achieve drying effect couldn’t move fast due to self-weight and are dried completely during the controlling route, thus achieving drying effect. After the whole drying process is completed, materials are discharged by the screw conveyor. Inside the roller is installed with a vibrating cleaning device, which prevents materials from bonding to the cylinder wall.
Air Flow: through hot blast stove and air blower inflating, the air enters into the hot blast stove for combustion heating. Its temperature reaches up to 600-850℃, then it is inhaled by the dryer induced draft fan to dry material and evaporate water. When the temperature decreases to 55-60℃, it is discharged out of the dryer. Wet air containing dust is discharged on standard through dust remover purifying.
The inner structure of dryer uses multiple efficient lifting plates combined mode, thus controlling the drying process and heat distribution effectively. High heat use ratio, the discharged off-gas temperature is lower than 50℃.
The internal agitator can realize the process of mixing ,dispersing and crushing ,which ensure the full mass transfer and heat transfer between hot air and wet material.the unit capacity is raised to more than 50% and the energy consumption is reduced by more than 30%.
It controls the material flow by frequency control. Users can adjust the required final moisture index easily based on requirement.
Saving 40% space and civil investment and 20%equipment investment compared to traditional dryers.
|Raw Material Moisture(%)||65±5%|
|Dried Material Moisture(%)||30%(adjustable)|