There are five main functions of the filter layer in capturing particles.
1. Interception effect: When a particle of a certain size moves near the surface of the fiber, and the distance between the fiber surface and the particle radius is smaller, dust particles will be intercepted by the filter material fibers and deposited.
2. Electrostatic effect: Both fibers and particles may carry charges, creating an electrostatic effect that attracts particles to the surface of the fibers.
3. Diffusion effect: Small particle sizes have strong Brownian motion and are prone to colliding with fiber surfaces.
4. Inertia effect: When the particle mass or velocity is large, it collides with the fiber surface due to inertia and deposits.
5. Gravity effect: When particles pass through the fiber layer, they settle on the fiber due to gravity.
Air filtration technology mainly adopts filtration separation methods
1. By setting filters with different performance, suspended dust particles and microorganisms in the air are removed, that is, dust particles are captured and retained through filter media to ensure the cleanliness requirements of the incoming air volume. The filter material used is fine diameter fibers, which can not only facilitate the smooth passage of airflow but also effectively capture dust particles.
2. Clean technology controls the filtration of dust, which is generally 0.1-10 μ The dust particles of m have a smaller particle size and contain both solid and liquid particles; The suspended organic particles in the atmosphere include microorganisms, plant pollen, flocs, and hairs. Microorganisms generally include viruses, rickettsia, bacteria, fungi, protozoa, and algae. The main control measures for air purification are bacteria, fungi, and viruses. Because microorganisms mainly adhere to dust particles, effectively controlling dust particles in the air can also effectively control bacteria, fungi, and viruses in the air. To achieve this, it is necessary to filter through a particulate filter with barrier properties. Generally, the filtration efficiency of ordinary filters for bacteria can reach 99.996, which can basically meet the filtration and purification requirements of biological cleanrooms.