A specialized enterprise engaged in the research, development, and manufacturing of powder grading equipment, whose TS series fly ash grading machine has been widely used in numerous home appliance factories and companies dealing with fly ash. It is a leader in large-scale production within the industry, capable of producing grading machines with a processing capacity of up to 200T/H. The TS series fly ash separator is an O-SepaSifterBased on our technical foundation, a new grading equipment has been successfully developed through digestion, absorption, and independent innovation. It achieves a grading efficiency of over 90% and a material-air ratio of 2.0 to 2.5 Kg/m³ of dry air.
One of the outstanding advantages compared to the current turbo分级机 is as follows:
1. Turbine classifier exhibits edge wall effect: The current turbine classifier is merely an additional rotating turbine device in the middle of the cyclone筒. The dusty gas containing mixed coal ash enters tangentially into the cyclone筒, resulting in high-speed rotation. Coarse particles are thrown towards the wall and fall due to centrifugal force. However, due to the influence of the edge wall effect, fine ash near the筒 wall is also thrown towards the筒 wall under the action of centrifugal force, mixing with the coarse ash, leading to unclean separation of fine ash.
2. Velocity gradient in airflow rotation: As the graded area is the annular region between the turbine periphery and the cylinder wall, the airflow enters only from one tangential inlet. Consequently, the gas velocity is higher in the inlet area and lower away from the inlet, resulting in an unstable flow field within the annular grading zone, which consequently affects the grading efficiency.
3. Cannot Form Planar Vortex: The current turbine classifier's turbine is merely a simple straight cage rotor without horizontal baffles. The grading blades are also made of flat steel, resulting in a rotational airflow that is not planar vortex but spiral airflow. Moreover, the speed of the air intake at the top of the cage is faster, while the intake speed at the bottom is slower, thereby affecting the grading efficiency.
4. The current turbo separator is designed with a tangential secondary air inlet at the bottom of the separator drum to clean the coarse ash, but if the wind speed of this secondary air is too high, it can easily lift a large amount of falling coarse ash, thereby interfering with the material separation at the top of the anti-interference separation zone. If the wind speed is too low, it fails to effectively clean the coarse ash.
II. Working Principle:
In operation, the motor is adjusted through a transmission device to rotate the drive shaft. Materials enter the separator chamber through the feed port located at the top of the separator chamber. They then pass between the upper and lower cones of the medium-coarse powder collection cone and fall onto the distribution disk. As the distribution disk rotates with the drive shaft, the materials are evenly scattered outward under the force of inertial centrifugal force. The scattered materials are then subjected to a high-velocity airflow through an external blower entering the separator chamber. The heavier coarse particles are ejected towards the inner wall of the separator chamber due to the inertial centrifugal force. After collision, they lose kinetic energy and slide down the wall, falling into the fine powder collection cone. The remaining particles are carried upwards by the rotating airflow. As they pass through the area of the large fan blades, some coarse particles are ejected back towards the inner wall of the separator chamber by the impact of the fan blades. After collision, they lose kinetic energy and slide down the wall, falling into the coarse powder collection cone.
Coarse and fine powders, after passing through the large fan blades, continue to rise under the influence of ascending air currents and enter the second-class selection zone through vertical guide vanes. The dusty air stream, under the strong and stable plane vortices formed by the rotating cage-type rotor, causes the coarse powder to lose kinetic energy and be thrown against the vertical guide vanes by centrifugal force, falling into the coarse powder collection cone and then discharged through the coarse powder pipe. The fine powder that meets the requirements passes through the cage-type rotor and enters its interior, following the recirculating air into a low-resistance cyclone separator, and then slides into the fine powder collection cone to become finished product.
1. Air outlet 2. Variable-speed motor 3. Transmission unit 4. Material inlet 5. Vertical drive shaft 6. Rotor blades 7. Squirrel-cage rotor 8. Vertical guide vanes 9. Cyclone separator 10. Distributing dish 11. Sorting chamber 12. Middle-coarse ash collection cone 13. Middle-coarse ash pipe 14. Intake air port 15. Coarse ash collection cone
Section 3: Its outstanding advantages include:
The designed straight-through impeller is a cage rotor composed of multi-layer horizontal baffles and vertical irregular grading vanes. The horizontal baffles create a stable horizontal vortex in the grading area, while the irregular grading vanes ensure that the grading airflow entering from the cage surface to the interior maintains the same velocity at any point, with a relative velocity difference of <5%. Consequently, the flow field in the grading area is uniform and stable, leading to a high grading accuracy.
2. Several guide vanes with a "concave" shaped groove are evenly distributed between the cage rotor and the outer shell. The dusty gas must enter the annular grading space formed by the guide vanes and the cage rotor through several gaps of about 15mm along the tangential direction, between the guide vanes. Due to the presence of the guide vanes, the edge wall effect is eliminated, significantly reducing the content of coarse ash and fine ash, and greatly improving the grading efficiency.
3. The coarse ash that falls into the coarse ash bin is washed by the upward airflow from the bottom, and the fine ash within the coarse ash is then recirculated into the classification zone for grading.
4. Due to the uniform and stable flow field, the air flow rotation speed is high, resulting in strong centrifugal force and centripetal air suction. Therefore, the grading accuracy is very high, and the material-air ratio can reach 2.0-2.5, which is 2-3 times higher than that of turbine grading machines (0.7-1.0). The air consumption for grading is only half of that of turbine grading machines, thus significantly reducing system energy consumption. A grading system with a processing capacity of 60T/H consumes only 120KW, while a system with a capacity of 40T/H consumes only 100KW.
4. Product Specifications and Performance
