Air separators ASH model with closed air circuit and cross-flow fan are designed for separation of dehulling cereal crop products (separation of husk and husking bran, hulls control, finished products control) and cleaning of wheat from light impurities.
Aspirators are applied at dehulling sections of groats mills and grain cleaning sections of mill enterprises.
Air separators ASH model with closed air circuit and cross-flow fan are designed for separation of dehulling cereal crop products (separation of husk and husking bran, hulls control, finished products control) and cleaning of wheat from light impurities. Aspirators are applied at dehulling sections of groats mills and grain cleaning sections of mill enterprises.
Separators are produced in accordance with third category of GOST-15150, climate version “U” for internal market and export to temperate countries. However, separators have to work reliably in operating regimes at a temperature from 10 (°С) degrees below zero to 40 (°С) degrees above zero, relative moisture 80% with average annual temperature of 15 (°С) degrees above zero, atmospheric pressure from 650 to 800 mm Hg (86,6÷106,7 kPa).
1. Throughput, t/h, min.
For separation of hulls and husking bran from dehulling cereal crop products:
For cleaning of wheat, rice, barley from light impurities
2. Technological efficiency, %, min.
1) Husk remove for separation of buckwheat, oat, rice dehulling products
2) For air-separating impurities remove from wheat and rice
3. Full value product content
in the settling chamber tailings, %, max.
4. Cross flow fan
rotor diameter, mm
quantity of rotor blades, pcs.
rotor speed (adjustable by replaceable pulleys), rpm
5. Auger for tailings removal
auger diameter, mm
auger shaft speed, с-1 (rpm)
6. Rated electric motor power kW, max.
9. Overall dimensions, mm, max.
10. Weight, kg
Structure and Functioning
Aspirator (fig.1,2) consists of inlet nozzle 1 and housing represented by prefabricated-welded construction made of sheet metal, which inner walls and baffles form receiving chamber 2, vertical aspiration 3 and recirculation 4 channels, settling chamber 5. Cross flow fan (rotor) 6 and auger 7 for settled tailings remove are installed in the settling chamber along the machine length. An outlet nozzle 8 is welded to the bottom of aspiration channel to remove cleaned product from the separator.
Weighted valves for product supply control and dividers 10 are installed in the top of receiving chamber. Divider position can vary towards inlet nozzle depending on product flow direction that allows its better distribution along the length of receiving chamber and aspiration channel. Position of valve is adjusted by movement of load on valves fixing lever. Product flows to the aspiration channel through feeder 11, which serves for its better distribution in separation zone.
Streamlined regulating flap valve 12 is installed at the input to the settling chamber for air regime control. Cross section of regulating valve has the form of lemniscate. Adjustment is carried out by stud 13.
Three stream bars for air flow adjustment are installed in settling chamber from the fan suction side. Groove position on the axes end, where turner bar is fixed, corresponds turner bar position in the separator (fig.1). Cross flow fan rotor of welded construction with disks, where 12 blades are welded. Rotor rotates in bearing blocks. Auger 7 is fixed on the chamber housing with screw bolts and serves for settled tailings remove from settling chamber. Auger shaft is installed on two ball-type spherical bearings. Antisuction valve is fixed on the nozzle for tailings remove, which is installed on the auger on the opposite side of the drive. Electric motor, which is installed on plate, V-belt transmission and countershaft are applied for fan 6 and auger 7 drive. Countershaft serves for V-belt tension from fan to auger.
Two inspection windows 14 are fixed on the machine end walls with rubber seals for visual observation of product supply process and separation in the aspiration channel. Cover with rubber seals is fixed on the housing end wall for installation and cleaning of separator internal surface.