Characteristics and principle of compressed air drying filter

Compressed air must be effectively filtered and dried before it can be used. The usual way to deal with it is to set a large compressed air drying filter near the compressor. The function of this filter is similar to the combination of three filters, that is, it can replace the mechanical aftercooler, oil filter and filter water filter.

Features of the compressed air dry filter: The compressed air dry filter includes an upper cover, a middle shell and a lower shell. Both the upper cover and the middle shell are provided with two round holes, and the two corresponding round holes of the upper cover and the middle shell are arranged side by side. Two aluminum barrels are connected to form the first filter chamber and the second filter chamber. The middle shell and the lower shell are connected by screws, and the lower end of the lower shell is connected with a drainage device with a joint. chamber and compressed air outlet chamber.

Working principle of compressed air drying filter: The compressed air carrying harmful substances such as dust, oil, rust and moisture enters the first filter chamber 30 of the drying filter, and the space becomes larger and expands. The shell of the drying filter is aluminum alloy, through heat conduction Effective heat dissipation, the compressed air is cooled, and the cooled compressed air contains less moisture, so this part of the water vapor is converted into water droplets. At the same time, the first-stage filter core makes all the particles larger than The 4 micron water vapor condenses into large water droplets.

As the compressed air turns and rises, the heavier water droplets that pass through the first stage filter collide with each other on the surface and combine to form large water droplets. These large water droplets flow to the bottom of the filter and are discharged from the filter system through a float valve. Other impurities are subsequently filtered out. The second filter element of the dry filter enters the water droplets smaller than 4 microns into the second filter element at a speed of 200-300 km/s. The special structure of the filter element makes the air flow constantly change direction in order to find the path through the filter element. The air vortex is formed, and the compressed air is accelerated, and the water droplets are quickly decomposed to form water vapor.

It can be seen that when the compressed air passes through the first-stage filter device, a coalescence effect occurs, larger particles will be adsorbed on the filter material, and the water will condense into larger water droplets. When entering the separation chamber, the compressed air speed Slow down, so that the particles gather again, the water mist condenses on a honeycomb water trap again, the water carrying the impurity particles flows along the bottom to the drainage position, and is discharged through the automatic or electric drain valve, and the compressed air passes through When the second stage is made of special cotton fiber filter, thousands of small vortices will be generated. At the same time, the compressed air will be accelerated by more than ten times, and the impurities will be further filtered, and finally the compressed air required by compound use will be formed.

1、The compressed air carrying harmful substances such as dust, oil, rust and water will enter the first stage filter of compressed air filter.

2、When the compressed air passes through the first stage of the cartridge mesh filter core to produce an agglomeration effect, larger particles will be adsorbed on the filter material, and water will condense into larger droplets.

3, into the separation chamber, the compressed air speed slowed down, so that the particles once again gathered, water mist again condensed in a honeycomb-shaped water collector.

4、Water laden with impurity particles flows along the bottom to the drainage device, which is discharged through the automatic or electric drainage valve.

5、More than 95% of the water droplets, oil and large particles in the compressed air have been filtered out by the first filter element, and the compressed air after the first stage filtration enters the second stage filter element.

6、When the compressed air passes through the fiber filter made of special cotton in the second stage, thousands of small vortexes will be generated, while the compressed air will be accelerated tens of times, and the center of the vortex will be like a tornado, forming a vacuum, and the water droplets not filtered in the first stage will be gasified, converted and filtered out again, while the particles as small as 5 microns will be completely removed by the second stage filter.

7、The clean and dry compressed air without dust, rust, oil and water droplets is achieved by two-stage filtration, which guarantees the normal operation of pneumatic equipment and prolongs the service life of pneumatic equipment.

Lingyu Machinery - moisture removal coalescing compressed air filter