Say goodbye to impurities in the gas source! Unveiling the filtration mechanism of precision compressed air filters

The core function of a precision compressed air filter is to remove impurities such as solid particles, oil mist, and water vapor from compressed air. Its filtration effect is derived from the synergistic effect of multiple mechanisms, which can be integrated into the following key types:

One is the inertial collision mechanism. When compressed air flows through the interior of the filter at high speed, the airflow will turn when it encounters the filter material fibers. Impurity particles, due to inertia, cannot follow the direction of the airflow in a timely manner and will directly collide with the fiber surface and be intercepted. This mechanism is particularly effective for larger solid particles and oil droplets.

The second is the direct interception mechanism. For smaller particles, when the airflow flows close to the filter fiber, the particles will be directly intercepted by the fiber due to their distance from the fiber surface being smaller than their own particle size. This mechanism is one of the core ways to capture fine impurities in precision filtration.

The third mechanism is diffusion and Brownian motion. For submicron sized particles, they undergo irregular Brownian motion in the airflow, which significantly increases the probability of contact between the particles and the filter fibers, and is then adsorbed and intercepted by the fibers, effectively compensating for the shortcomings of inertial collision and direct interception mechanisms in filtering ultra small particles.

The fourth is the mechanism of gravity settlement. When compressed air flows through the filter, the airflow velocity decreases, and some larger particle impurities naturally settle under the action of gravity, being captured by the bottom of the filter material or specific interception areas, further assisting in improving the removal efficiency of large particle impurities. In addition, some precision filters also utilize the electrostatic adsorption mechanism, which utilizes the electrostatic effect of the filter material or impurity particles themselves to adsorb the particles on the surface of the filter material, further improving the filtration efficiency. The above five mechanisms work together to ensure that the compressed air precision filter can stably output clean air and meet the strict requirements for air source purity in industrial production.