Fly Ash Dryer

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The working principle of fly ash dryer: The material goes to the internal layer of the three-layer roller by way of feeding system to be dried in direct flow way. The material is lifted by the internal layer shoveling plate repeatedly and disperses in a spiral shape to exchange heat. The material moves to the other end of the internal layer and enters into the medium layer for reverse flow drying where the material is made moving forward and back again and again in a station of moving forward two steps while backward one step. The material in the medium layer absorbs the heat from the inner layer of the roller as well as from the medium layer roller which prolongs the drying time and the material can be in the best drying station. The material drops to the outer layer when it comes to the end of the medium layer and moves in a rectangle multi-loop way. The one that qualified for the drying effect moves fast out of the roller under the hot wind. The one unqualified can not move as fast due to its self weight and will be dried fully in rectangle shoveling plate. Thus end the drying process. The wet fly ash exchange heat fully with the hot current mainly by way of convection and heat conduction. Radiating is also one way. The three-layer roller structure prolongs the material’s stay in the equipment which increase the heat exchange time, improve the heat energy service efficiency and decrease the equipment floor area. The main characteristics of the fly ash dryer: it can use coal, oil and gas as fuel. It can dry the lump material, granules and powdery material with a diameter less than 20mm. With the final moisture in the material being less than 0.5%, it is the preferred product in fly ash and slag production line. it adopts alloy steel plate whose wear resistance is 4 times than the normal steel. It adopts tug boat motion without gear wheel and pinion. The dust extraction equipment has a long service time. the self heat insulation efficiency reach up to more than 80%(the heat efficiency of the traditional uniocular dryer is 35%), 45% raised than the traditional one. The floor area is about 55% less than the uniocular dryer. The civil engineering investment is decreased by about 50%. The current drain is lessened by 60%. The brief introduction of process flow: Cyclone dust collectors → bag filter → draught fan ↑ Scatter feeder → belt conveyor → hopper → feeder → drying drum → wind conveyor → end product ↑ High efficient air heater

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Henan Bailing Machinery Co., Ltd.

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