Fluidized bed airborne Features and Working Principles
Fluidized Bed Air Flow Working is a combination of reverse injection or expansion gas injection flow in the ingenuity and fluidized bed, its working principle is:
(1) The material is given in the silo by the star valve. The screw feeder is fed into the pulverizing chamber or directly in the pulverizing chamber;
(2) Compressed air, through the pulverizing nozzle, drastically expanded the supersonic jets generated by the supersonic jet The lower portion of the pulverization chamber forms a heart inverse jet flow field, and the material is fluidized to the bottom of the mill, and the accelerated material is integrated at the intersection of the multi-nozzle, producing a dramatic impact, collision, rubbing;
(3) The pulverized material moves with a rising airflow to a certain height of the upper portion of the pulverizer, and the thick particles fall below the grinding chamber wall, and the fine powder is along with the airflow. Movement to the top of the turbine classifier.
(4) In the flow field produced by the high speed turbine, the crude particles are pulled around the cylindrical wall under centrifugal force, followed by a stall with the stall coarse powder to the mill lower portion and then pulverized.
(5) Micro powder that meets the fineness requirements, passes through the graded flow channel, conveying the exhaust pipe to the cyclone as a product collection, and a small amount of micro powder is further air solid separation by the bag trap, purifies The air is exhausted by the ventilator.
(6) The connecting tube can be consistent with the pressure of the silo and the pulverization chamber.
(7) On the silo, the lower material is automatically controlled by the precision level sensor, and the pulverity is automatically controlled by the dynamic current transmitter on the grading machine. The comminution is always in a good state.
The uniqueness of fluidized bed airflow mill is that the traditional airflow line, the surface impact pulverization is made into space stereoscopic shock, and the high-speed jet generated by the spray shock can be utilized for pulverization In the room of material, the mill is produced.It is like a fluidized state of gas-solid powder and grading circulating fluid effect, which improves impact pulverization efficiency and energy utilization.
Other features are as follows: high pulverity efficiency, low energy consumption: gas flow belt particles are multi-angle, and the force is large , The stress of powder particles is complex, and the energy of the applied energy is sufficiently absorbed, the injection power is less; the fluidized bed is combined with the flat turbine superfine classifier, so that the fine material is discharged in time, and reduces the fine powder The energy that is pulverized and lost. The average energy consumption is reduced by 30 to 50% compared to disc airfoil mill.
Wear light, less pollution: from the first impact, powder granules mainly carry out collisions between each other, and collide with the outdoor wall. The equipment is small, and the area is small: under the premise of the same production capacity, the fluidized beds are reduced by 10 to 15% by the disc gantry gas, covering an area of 15 to 30%. High degree of automation, small noise, large production capacity, suitable for large-scale industrial production.
