How does an air filter filter harmful gases

Air filtration technology is the first choice of filtration separation method

1. By setting filters with different performance, the suspended dust particles and microorganisms in the air are removed, that is, the dust particles are captured by the filter material to ensure the cleanliness requirements of the air volume. The filter material used is a fine diameter fiber, which can not only make the air flow through smoothly, but also effectively trap dust particles.

2. The dust controlled by clean technology is generally 0.1-10μm dust particles, with a small particle size, including solid particles and liquid particles; Organic particles suspended in the atmosphere include microorganisms, plant pollen, floss and fluff, and microorganisms generally include viruses, rickettsia, bacteria, fungi, protozoa and algae. The primary air purification control is bacteria and fungi, viruses. Because microorganisms are primarily attached to dust particles, effectively controlling dust particles in the air can effectively control bacteria, fungi and viruses in the air. To do this, it is necessary to filter through a blocking particle filter. In general, the filtration efficiency of the general filter for bacteria can reach 99.996, which can basically meet the filtration and purification requirements of the biological clean room.

The effect of the filter layer of the air filter to trap particles is mainly divided into five categories.

1. Blocking effect: When the particles of a certain particle size move near the fiber surface, the interval of the fiber surface is less than the particle radius, and the dust particles will be blocked by the filter fiber and accumulated.

(2) Electrostatic effect: fibers or particles may be charged, the electrostatic effect of attracting particles, and the particles will be attracted to the surface of the fiber.

3. Diffusion effect: The Brownian motion of small particle size particles is strong and simple to collide with the fiber surface.

4. Inertia effect: When the particle mass is large or the speed is large, it collides on the fiber surface due to inertia and accumulates.

5. Gravity effect: When particles pass through the fiber layer, they accumulate on the fiber due to gravity settlement.