Fluidized bed supersonic airflow pulverization classifier

Grinding fineness: 0.5-40 micrometers (μ m)

Applicable fields: pharmaceuticals, fine chemicals, papermaking, coatings, plastics, pesticides, solid lubricants, advanced ceramics, abrasives, fine ceramics, building materials, refractory materials, cosmetics, food and health products, and various other industries.

Guided by aerodynamic theory, TQ system has absorbed the essence of flat jet mill, circulating tube jet mill, impact jet mill, reverse jet mill, AFG fluidized bed reverse jet mill and other equipment technologies, and has highly integrated supersonic nozzle technology, fluidized bed technology, centrifugal force field classification technology, to avoid and overcome the shortcomings of traditional air flow comminution, so as to complete comminution, classification and collection at one time, forming a set of ultrafine comminution classification system whose main performance has reached the advanced level at home and abroad. The fineness of the crushed powder can reach 0.3 microns.

The crushing structure of TQ system is divided into two forms: fixed nozzle (TQG) and rotating nozzle (TQX)

　Composition structure:

1. Air source section (air compressor, refrigerated dryer, filter)

2. Crushing and grading section (automatic feeder, supersonic nozzle, crushing chamber, grading chamber)

3. Collection section (cyclone collector, isolated collector, induced draft fan)

4. Control part (electrical control cabinet). (See the figure below)

　　working principle:

　　1. Principle of TQG fixed airflow pulverization

Introduce purified and dry compressed air into several Laval nozzle shapes facing each other

Generate supersonic airflow and enter the crushing chamber. The material is sent from the hopper to the crushing chamber and is subjected to supersonic gas

Flow acceleration, becoming high-speed moving jets, colliding and shearing with each other at their intersections; due to

A high-speed multiphase fluidized bed is formed inside the crushing chamber, greatly improving the crushing strength and efficiency,

　　2. Principle of TQX rotary jet flow pulverization

Introduce purified and dry compressed air into Laval nozzles installed at several opposite positions in the crushing chamber to form supersonic airflow. The nozzles can rotate and adjust their rotation speed according to different materials. The material is transported from the hopper to the crushing chamber and accelerated by supersonic airflow at the nearest distance, becoming a high-speed moving jet that collides with each other at its intersection; Due to the adjustable rotating supersonic airflow inside the crushing chamber, the distance from the material in the crushing chamber to the intersection point is always the shortest, which greatly improves the crushing strength and efficiency. Compared with the fixed nozzle fluidized bed crusher, its production capacity is increased by 50%. This is the basic principle of the new generation of advanced airflow pulverization.

　　3. The principle of airflow classification

Our company's uniquely designed grading wheel disperses the powder in the air flow from bottom to top within the grading chamber. Under the action of rotational force, a horizontal centrifugal force field is generated (the size of the centrifugal force field can be adjusted by frequency conversion), and the powder forms a certain distribution band. Qualified micro powder particles move towards the center of the rotor, are sucked away by the induced draft fan, and then collected by components such as the cyclone collector; Coarse particles that do not meet the requirements move towards the side wall of the classification chamber and fall (the reasonable space from the classification wheel to the side wall of the classification chamber prevents the coarser particles from rebounding to the center of the rotor), and are subjected to secondary crushing in the crushing chamber.

　　Technical features:

1. Pollution free: Materials are crushed by high-speed airflow collision, avoiding secondary pollution during processing;

2. Low temperature: The material temperature in the crushing chamber is within 10 ℃;

3. High kinetic energy for crushing: The supersonic airflow generated by this equipment reaches a speed of over 3 Mach, allowing the material to gain significant kinetic energy. When the material collides

Converted into impact force, the fineness of the crushed powder can reach 0.5 microns;

4. Low speed classification: The uniquely designed classification flow field and variable frequency speed adjustable vertical classification wheel can classify product particle size at low speeds (less than 3000 revolutions per minute, greatly extending the service life of the classifier), which strictly limits "large particles" and avoids over crushing. Therefore, the product has a narrow particle size distribution and uniform particle size;

5. Negative pressure operation: The powder does not leak during the crushing process, with no environmental pollution and low noise;

6. Compliant with GMP: The parts in contact with the material are made of high-quality austenitic stainless steel, and the equipment is circular with no dead corners. It adopts a bolt free and seam free design, and is all connected by clamps. It is easy to disassemble and install, and easy to clean.