What are the common types of grinding airflow mills

The airflow crusher and cyclone separator, dust collector and induced draft fan form a complete set of pulverization system
.

After the compressed air is filtered and dried, it is injected into the pulverization chamber at high speed through the Laval nozzle, and the material is repeatedly collided, frictioned, sheared and crushed at the intersection of multiple high-pressure air flows, and the crushed material is moved to the classification area with the updraft under the action of the fan pumping, and under the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated, and the fine particles that meet the particle size requirements are collected through the grading wheel into the cyclone separator and the dust collector, and the coarse particles fall to the crushing area to continue crushing
。
What are the grinding types of common airflow pulverizers: 1.
After the material enters the pulverizing chamber through the spiral feeder, several relatively set nozzles spray out the high-speed airflow impact energy, and the rapid expansion of the airflow is the collision and friction of the fluidized bed suspension boiling and the material is pulverized
.

The coarse and fine mixed powder is driven by the negative pressure air flow through the turbine grading device set at the top, the fine powder is forced through the grading device, and captured by the cyclone collector and the bag dust collector, and the coarse powder is flicked to the four walls by gravity and the centrifugal force generated by the high-speed rotating classification device and settles back to the crushing chamber to continue crushing
.

2, flat type airflow mill as the pulverized kinetic energy of the high-pressure airflow into the crushing chamber outside the pressure storage package as the airflow distribution station, the airflow through the Laval nozzle accelerated into a supersonic airflow into the pulverizing grinding chamber, while the material through the Wenqiuli nozzle accelerated into the pulverization mill chamber for synchronous pulverization
.

Since the Laval nozzle is installed at a sharp angle with the pulverizer, the high-speed jet stream drives the material to circulate in the pulverizing chamber, and the particles and the wall surface of the fixed target plate collide, collide and rub each other and crush
.

The fine particles are driven by the centripetal air flow and are introduced into the cyclone separator into the cyclone separator for collection, and the coarse powder is thrown to the circumferential wall of the crushing chamber under the action of centrifugal force for circulation movement and continues to be crushed
.

3, circulation tubular air flow milling raw materials by the venturi nozzle to add the crushing chamber, high-pressure air flow through a group of nozzles sprayed into the runway shaped circular tubular crushing chamber of unequal diameter curvature, accelerate the particles so that they impact each other, collide, friction and crush
.

At the same time, the swirl also drives the crushed particles up the pipeline into the grading area, and under the action of the centrifugal force field in the grading area, the dense material flow is diverted, and the fine particles are discharged
after the inner layer is graded by the blind-type inertial classifier.

The coarse particles return in the outer layer along the downward tube to continue circulating pulverization
.

4, fluidized bed type airflow mill airflow pulverizer (fluidized bed type airflow mill) is compressed air through the Laval nozzle accelerated into supersonic airflow and then shot into the pulverization area to make the material fluidized (airflow expansion is fluidized bed suspension boiling and collision with each other), so each particle has the same state
of motion.

In the pulverization zone, the accelerated particles collide with each other at the intersection of each nozzle
.

After the pulverization, the material is transported to the grading area by the updraft, and the fine powder that meets the particle size requirements is screened out by the horizontal arrangement of the grading wheel, and the coarse powder that does not meet the particle size requirements is returned to the crushing area to continue crushing
.

The qualified fine powder is collected with the air flow into the high-efficiency cyclone separator, and the dust-containing gas is filtered and purified by the dust collector and discharged into the atmosphere
.