The airflow pulverizer, cyclone separator, dust collector and induced draft fan form a complete pulverizing system. After being filtered and dried, compressed air is sprayed into the crushing cavity at high speed through Laval nozzle. At the intersection of multiple high-pressure air streams, materials repeatedly collide, rub, shear and crush. The crushed material moves to the classification area with the updraft under the suction of the fan, and the coarse and fine materials are separated under the strong centrifugal force generated by the high-speed rotating classification turbine. Fine particles that meet the particle size requirements enter the cyclone separator and dust collector through the classification wheel for collection, and coarse particles descend to the crushing area for further crushing.

Classification:

1, jet air pulverizer

After the material enters the crushing cavity through the screw feeder, the impact energy of the high-speed airflow is ejected by several nozzles arranged oppositely, and the material is crushed by the collision and friction generated by the rapid expansion of the airflow in the fluidized bed suspension boiling. The coarse-fine mixed powder is driven by negative pressure airflow to pass through the turbine classifier arranged at the top, and the fine powder is forced to pass through the classifier and collected by cyclone collector and bag filter. The coarse powder is thrown to the four walls by the gravity and centrifugal force generated by the classifier rotating at high speed, and settles back to the crushing cavity to continue crushing.

2. Flat jet grinder

The high-pressure air flow as crushing kinetic energy enters the pressure-stabilizing air storage bag at the periphery of the crushing cavity as the gas distribution station, and is accelerated into supersonic air flow through the Laval nozzle and then enters the crushing and grinding cavity, and the materials are accelerated into the crushing and grinding cavity through the Venturi nozzle for synchronous crushing. Because the Laval nozzle is installed at an acute angle with the crushing cavity, the high-speed jet drives the material to move circularly in the crushing cavity, and the particles collide, collide and rub with the wall surface of the fixed target plate to be crushed. Driven by the centripetal airflow, fine particles are introduced into the central outlet pipeline of the pulverizer to enter the cyclone separator for collection, and coarse powder is thrown to the surrounding walls of the pulverizing chamber for circular movement, and continues to be pulverized under the action of centrifugal force.

3. Circulating tubular airflow pulverizer

Raw materials are added into the crushing cavity from Venturi nozzles, and high-pressure airflow is injected into the racetrack-shaped circulating tubular crushing cavity with unequal diameters and variable curvatures through a group of nozzles, so as to accelerate the collision, collision and friction of particles and crush them. At the same time, the cyclone also drives the crushed particles to enter the classification area upward along the pipeline, the dense-phase logistics is diverted by the centrifugal force field in the classification area, and the fine particles are discharged after being classified by the inner louver inertial classifier. Coarse particles return to the outer layer along the downcomer and continue to be broken circularly.

4. Fluidized bed airflow pulverizer

Air flow pulverizer (fluidized bed air flow pulverizer) accelerates compressed air into supersonic air flow through Laval nozzle, and then injects it into the pulverizing area to fluidize the material (the air flow expands in fluidized bed suspension boiling and collides with each other), so the motion state of each particle is the same. In the crushing zone, the accelerated particles collide with each other at the intersection of nozzles. The crushed materials are transported to the classification area by the updraft, the fine powder meeting the granularity requirement is screened out by the horizontally arranged classification wheel, and the coarse powder not meeting the granularity requirement returns to the crushing area for further crushing. The qualified fine powder enters the high-efficiency cyclone separator with the airflow and is collected, and the dusty gas is filtered and purified by the dust collector and then discharged into the atmosphere.

Performance characteristics:

1, negative pressure production, no dust pollution, excellent environment;

2. Equipped with self-flow classification system, the product particle size distribution is narrow, and the service life of the classification wheel is 5 ~ 8 times longer than that of horizontal and vertical classification wheels;

3. With the same energy consumption, the output is 1 times higher than that of ordinary jet mill;

4. It is not only used for superfine grinding of materials, but also has the functions of particle shaping and particle dispersion;

5. For inflammable, explosive and easily oxidized materials, inert gas can be used as the medium to realize closed-circuit crushing, and inert gas circulation is used, so that the loss is extremely low and resources are reasonably utilized;

6. Low temperature and no medium grinding, especially suitable for ultra-fine grinding of low melting point and heat-sensitive materials;

7. The abrasion degree of jet mill is very small, which is especially suitable for superfine grinding of high hardness and high purity materials;

8. The equipment has compact structure, polished internal and external walls, no materials in the crushing box, no dead angle, easy cleaning, and meets GMP requirements;

9. Automatic control, simple operation and stable operation.

Application field:

Widely used in chemical industry, minerals, metallurgy, abrasives, ceramics, refractories, medicine, pesticides, food, health products, new materials and other industries.