Working Principle of Spin Flash Drying Equipment:
XSG series rotary flash dryer is a high efficient new type drying equipment with wide accommodation developed and designed on the basis of summarizing the vulcanizing bed, thermal smashing, rotational flow and grading technology. The heated (or dehumidified) air enters into the agitating breaking drying chamber from the bottom of the dryer with a suitable spouting speed to produce a strong cutting, blowing and floating and rotating function to the materials, and then the materials are centrifuged, cut, impacted and rubbed to become micronized, forming larger specific surface area and strengthening the heat transmission of the mass transfer. The large and wet pellet groups are smashed under the action of the agitator at the bottom of the drying chamber and the smaller pellets with less moisture content are brought up by the rotating air flow, dried further during going up and graded.
Process Flow Diagram
Dynamic Sketch Map of the Rotary Flash Dryer
Characteristics
Drying sticky materials
The cone structure in the dryer, washing out of the air flow to the wall and the structure of the agitator determines it can deal with certain sticky materials.
Drying thermo-sensitive materials
As the drying time is short, the relative speed between the materials and the hot air is big, and the hottest air does not contact the dried materials directly, it is suitable to treat the thermo-sensitive materials.
The system eliminates the operation environment pollution under the negative pressure in the operation and it adopts different dust removing mode and materials according to the different raw materials (pulse bag dust catcher, water shower duster, Venturi damp dust remover and so on).
Low labor intensity
The feeder and the discharger are made in different forms according to the difference of the materials so as to reach automatically continuously feeding and discharging aims.
The best power matching
The blower, the draught fan, the agitator and the feeder and so on are furnished with the best power according to the different nature of the materials (density, bulk density, viscosity, fineness, primary moisture, final moisture, angle of repose and so on).
Heating mode and configuration The heater is the equipment of sending heat source for flash drying. Heating of the air can adopt steam heating exchange or steam electric heating (c), hot-air stove indirect heating (a), gas direct heating(b) with coal, oil, gas and so on as the heating fuel. The temperature of the input hot-air can be at 100- 600.
Feeder The feeder is the structure designed according to the different physical nature of the materials and it can send the various wet grade sticky materials continuously into the dryer. Feeding is divided into single screw, double screws, screw with shaft and without shaft and multi-shaft screw and so on. A screwdown gear is added in order to prevent the silo from blocking the material. When sending liquid materials it adopts special feeding mode.
Main drying machine (drying chamber) The main drying machine assumes round structure. Dispersing blades are equipped in the drying chamber and there is an annular slot at the bottom of the drying chamber. The factors of the shape of the bottom of the drying chamber, annular slot and so on are adjusted with the changes of drying materials. The diameter of the drying chamber can be changed from 250mm to 2750mm and the temperature of the drying chamber can reach as high as 600.
Material collector As the material dried in the drying chamber enters into the collector, the specific weight, fineness and viscosity of the dried powder has close relationship with the selection of the configuration of the collector. Selection of the collector often uses a1 b1 forms and the quality of the material is selected from the angle of antisepsis, heat-resistance and so on. Drying of the material having special physical characteristics in the drying process and requiring special process such as inert gases protection, heat-sensitivity, antistatic behaviour all should adopt the different systematic configuration mode in conformity with the process.Technical parameters
Type | Inner diam. ofthe main machine(mm) | Air quantity m3/h | Moisture evaporation kg/h | Installed capacity kw | Max. height m | Floor area m2 |
XSG-2 | 200 | 350-500 | 12-17 | 6-10 | 3.5 | 10 |
XSG-4 | 400 | 1150-2000 | 40-70 | 12-18 | 4.2 | 18 |
XSG-6 | 600 | 2450-4500 | 80-150 | 20-25 | 5.2 | 25 |
XSG-8 | 800 | 4500-7550 | 150-250 | 27-32 | 5.6 | 32 |
XSG-10 | 1000 | 7000-12500 | 230-420 | 40-47 | 6.2 | 38 |
XSG-12 | 1200 | 10000-18000 | 300-600 | 50-65 | 7.0 | 45 |
XSG-14 | 1400 | 13500-23500 | 450-750 | 60-72 | 7.4 | 55 |
XSG-16 | 1600 | 18000-32000 | 600-1200 | 70-90 | 8.0 | 75 |
Notice
1.)Moisture evaporation volume is the maximum moisture evaporation volume measured when the entering air temperature is 180 and discharging air temperature is 80;
2.)The max height and floor coverage will be laid according to the actual conditions, the data in the table is only for reference.
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