Filter cake paste material drying equipment is only one: China national new products and national torch plan project
A, the performance and characteristics of flash drying
Instant drying, the drying time 1-5 seconds, the product does not overheat, uniform quality, liquidity is good; 
System is closed without cross contamination, yield > 99% above; 
Heat source USES the hot blast stove, steam, electricity, flue gas, coal, gas and liquid as fuel, combustion mode for direct or indirect, hot blast temperature 90-600 ℃; 
High thermal efficiency, strong evaporation capacity, heat consumption of 1100-1200 kcal/kgH2o, series products of kgH2o evaporation capacity of 90-90 / h (single); 
To adapt to the filter cake, dry paste high moisture materials, material moisture content can reach more than 85%, water cut is less than 0.5%; 
Cover an area of an area small, less of choose and employ persons, equipment integrated operation cost is low.
Second, the drying process
Flash drying system is mainly composed of the heat source, feeder, the trap host, drying, moisture materials into the flash feeder (2), and into the drying chamber (3), (7) in mechanical dispersible tablet and the heater (1) under the action of warm air heating, rapid dry flour, after grading ring (6) classification into trap (4) capture, capture the material through the discharging mouth (8), tail gas by induced draft fan (5) closed.
The choice of three, dryer system
According to the characteristics of the drying material, mainly considering drying products, dry atmosphere, heat-sensitive, dispersion, choose the way to form a complete set of dry, most products select flash drying basic configuration mode can satisfy the requirement of production technology, supporting way system configuration choice figure for reference.
Heating mode and configuration
Heater is for conveying flash drying heat source equipment, can use steam electric heating mode of air heating (c), indirect heating of hot air stove, gas heating (b) (a), using for heating fuels such as coal, oil, gas, the input air temperature can be in 100-600 ℃.
feeder
Feeder is to all kinds of humidity and viscosity of the material continuously into the drying machine, the structure of the feeder designed according to the different physical properties, divided into single and double spiral feeding way, with shaft without shaft screw and multiaxial screw, etc., to prevent feeding bunker bulk material, increase the screwdown, when conveying liquid material, with special feeding way for delivery.
Drying host (drying chamber)
Drying the host assumes the circular structure and drying chamber set scattered leaves, at the bottom of the drying chamber equipped with clearance, factors such as shape, ring gap at the bottom of the drying chamber with the change of the drying material to carry on the adjustment, drying chamber from 250-2750 - mm diameter size changes, drying room temperature can be as high as 600 ℃.
Material catcher
Due to drying chamber after drying of material into the trap capture, dry powder, grain size, the proportion of adhesion after the selection of trap configuration there is a close relationship, the choice of trap commonly used a1, b1, form, material to choose from the aspects of material corrosion, heat resistance, etc.
In the drying process with special properties and special process requirement of material drying, such as inert gas protection, heat-sensitive, antistatic property, should adopt different ways of conform to the process of system configuration.
Closed loop system
System with inert gas (usually nitrogen) circulation, processing contain volatiles and dry can't contact with oxygen evaporation of volatiles in the condenser of the raw inert gas is added according to the pressure change and determine the oxygen content in the system.
Four, drying machine parameter selection
Drying machine production and heating temperature mainly about, see chart, drying machine production capacity within the scope of the series machines can reach several kilograms to several tons of production, the product series table drawings, the important parameters of dryer is the inlet and outlet temperature and velocity of drying chamber, the parameter selection should be based on product property, water content, proportion, the product particle size and so on, also should be tested in the lab, make reasonable choice.
Evaporation curve SKSZ spin flash dryer
The application of five, the dryer
Flash dryer is suitable for a variety of material drying, applied to different materials dry areas.Application field and under typical use such as:
Molybdenum concentrate drying machine, white drying machine, dryer, kaolin carbon black dryer
Flash drying material typical use cases: (data in the table are only suitable for this model and the temperature, improve the drying temperature can increase production accordingly)