Jiangsu-up green wet fly ash dryer has a moisture large proportion of small, fine granularity and other notable features. The traditional drying drying equipment can not solve the problem of wet fly ash. Such as when using a conventional dryer drying ash, because of the above three kinds of materials have characteristics within the device to form a wind tunnel, causing a short circuit of hot air, exhaust gas temperature is high, the heat loss is very serious. In the early moisture ≤20%, ≤5% final moisture, the coal consumption of coal for 15 ~ 20Kg / T dry material. Fly ash drying system works wet material handling equipment will be less than 20% moisture wet fly ash into the break in the feeder, with a beaten and broken feeder conveyor dual function, so that the material evenly give it away conveyor, and then into the storage bin, and then through screw feeder, evenly dry fly ash into the drum. The device than the traditional drum dryer energy saving third, greatly reducing the cost of production, the technology leader in the domestic level, it works as follows: Material from the feeding device into the inner three-cylinder, to achieve downstream drying, the material in the inner constantly took a copy board, scattered spiral marching heat exchange, the material is moved to the other end of the inner layer into the middle, countercurrent drying, the material is repeated constantly in the middle Yang Jin, was traveling way to step back two steps forward, both fully absorb the material in the middle inner cylinder the heat, but also absorb heat the middle of the drum, while extending the drying time, the best material in this dry state. The other end of the line to the middle of material falling into the outer layer of the material in the outer drum rectangular multi-loop approach to travel, to the drying effect of the material in the hot air discharge action fast marching drum, there is no effect of the wet material to dry weight and not due to rapid the road, the material within this rectangle copy board is fully dried, so as to achieve drying effect, complete the drying process. Wet fly ash and hot gas were sufficient heat exchange, the main mode of convection and heat conduction, radiation, and there are also a certain role. Three roller structure is conducive to the material in the device along the long residence time, which increases the heat exchange time and improve the thermal efficiency, and reduces the equipment footprint. The main features of a system of fly ash drying equipment investment required is imported products 1/6. 2 Materials final moisture to ensure 0.5% fly ash and slag powder production line product of choice. 3 cylinder self insulation thermal efficiency as high as 80% (traditional monocular dryer thermal efficiency of only 35 percent) to improve the thermal efficiency of 45%. 4 fuel suitable coal, oil, gas, energy drying 20mm below the block material, pellets and powder materials. 5 less than in monocular dryer covers about 50%, construction investment is about 50% lower, at 60 percent lower power consumption. 6 and alloy steel plate fabrication using four times more than ordinary steel wear. 7 can easily control the final moisture indicators needed according to user requirements. 8 outlet temperature is low, dust removal equipment long time. Fly ash drying system design should pay attention to the problem of an early moisture control. Just discharged from the plant wet ash is generally about 45% moisture. Then immediately drying, the larger the cost of production, the equipment also pose a greater pressure. Piled in a well-ventilated place about 15 days, so the water dropped to about 20%, and then processed. 2, ESP selection. Due to fine particles of fly ash, light density, after drying under negative pressure, air flow away easily, leading to changes in the fluid medium, and large gas dust moisture. Dust should be based on the above process state selection. 3, dry material handling equipment should be noted sealed. 4, stove choice. Stove should be used in high-efficiency, fully fueled with low-quality coal, convenient operation of the furnace.