The air inside the machine is drawn out by a fan or air pump, creating a pressure difference between the inside and outside of the machine, known as negative pressure. The higher the negative pressure, the stronger the suction. A vacuum cleaner is actually a very simple mechanical device, which mainly exhausts air through a vortex air pump or fan. After the debris enters the machine through the suction nozzle and the dust suction tube, it first enters the filter bag, typically made of non-woven fabric. The air carrying fine dust is filtered once, then passes through a special filter for secondary filtration, and is finally discharged through the fan exhaust hole. The filtration efficiency can reach over 99%.
The following are common types of dust collectors and their working mechanisms:
1.Gravity Dust Collector
Principle: Dust particles settle naturally due to gravity.
Working process: Dust-laden gas enters the dust collector, and the airflow slows down. Dust particles settle to the bottom under gravity, while clean gas is discharged from the top.
2.Inertial Dust Collector
Principle: Uses inertia to separate dust particles.
Working process: When dust-laden gas passes through a baffle or curved channel, the airflow changes direction. Due to inertia, dust particles collide with the baffle and settle, while the clean gas continues to flow.
3.Cyclone Dust Collector
Principle: Uses centrifugal force to separate dust.
Working process: Dust-laden gas enters tangentially, forming a rotating airflow. Dust particles are thrown to the wall by centrifugal force, settle down, and clean gas is discharged from the center.
4.Bag Filter
Principle: Uses bag filtration.
Working process: Dust-laden gas passes through the filter bag, which adsorbs particles on its surface. Clean gas is discharged through the bag. The bag is cleaned regularly to maintain filtration efficiency.
5.Electrostatic Precipitator
Principle: Uses an electric field to separate dust.
Working process: Dust-laden gas passes through a high-voltage electric field, charging the particles. The charged dust moves to the collecting electrode, adheres to it, and clean gas is discharged. The electrode is cleaned regularly.
6.Wet Dust Collector
Principle: Uses liquid (usually water) to capture dust.
Working process: Dust-laden gas comes into contact with liquid (such as water mist), and the liquid captures the dust. Clean gas is discharged, and the wastewater is treated or recycled.
7.Filter Dust Collector
Principle: Filters dust through porous media (such as filter cartridges or filter plates).
Working process: Dust-laden gas passes through the filter media, which captures particles. Clean gas is discharged through the media, and the media is cleaned or replaced regularly.
Different types of industrial dust collectors are suitable for different scenarios. The selection depends on factors such as dust characteristics, gas flow rate, and temperature to achieve optimal dust removal efficiency.