-
E-mail
yhb_zwft@163.com
-
Phone
13916728674
-
Address
No. 98 Shuangzhu Road, Huating Town, Jiading District, Shanghai
Shanghai Zhikai Powder Machinery Manufacturing Co., Ltd
Process principle of fluidized bed airflow pulverizer
Date: 2025-03-26Read: 0
The process principle of fluidized bed airflow pulverizer is based on the combination of high-speed airflow and material fluidization to achieve ultrafine pulverization. The core process can be summarized as follows:
1、 Compressed gas pretreatment and acceleration
1. Gas processing
Compressed air (or inert gas) is frozen, filtered, and dried to form a clean and dry gas source.
2. Supersonic airflow generation
The processed gas is accelerated into a supersonic jet through a Laval nozzle and injected into the crushing chamber to create a high-pressure environment.
2、 Material fluidization and crushing
1. Material introduction and fluidization
The material enters the crushing chamber through a star valve or screw feeder and is in a fluidized suspension state under the action of high pressure difference.
2. Multi nozzle intersection collision
Multiple supersonic airflows form a turbulent field at the intersection of the crushing chamber, where material particles are crushed to the micrometer or nanometer level due to violent collisions, friction, and shear effects.
3、 Grading and Collection
1. Turbine grading technology
The crushed particles rise with the airflow to the turbine classification zone and achieve coarse and fine separation under the centrifugal force of the classification wheel. Coarse particles are thrown back into the crushing zone for cyclic crushing due to centrifugal force, while fine particles enter the collection system through the classification wheel.
2. Gas solid separation and collection
Fine particles are initially collected by a cyclone separator, and fine powder is further captured by a bag filter. The purified gas is discharged or recycled through an induced draft fan.
4、 Closed loop system (optional configuration)
In the inert gas protection process, the gas is recovered and recycled by the compressor after dust removal and purification, forming a closed-loop pressure holding environment, suitable for processing flammable, explosive or high-purity materials.
Key process characteristics:
1. Energy consumption optimization: Fluidization design reduces mechanical friction, and multiple nozzle intersections improve collision efficiency.
2. Particle size controllable: By adjusting the speed of the grading wheel, the particle size of the finished product can be precisely controlled.
3. Pollution free: The fully enclosed structure avoids external pollution, and the circulation of inert gas ensures the chemical stability of the material.
