panel filter In china Blog
Title: The role of air filter and filter options
In compressed air systems, pollution can cause serious problems. Because the air is capable of being compressed, particulate pollutants can be inhaled in the compressor during the compression process.
In a 0.8MPa system, the number of pollutants in the compression system is enhanced 8-fold. At the moment, these pollutants can lead to the compressed air particles produced suffered serious damage. These pollutants is the pipeline dirt, wear particles, soot and combustion process of micro-organisms. Can be divided into three categories: Large dust particles in the size of 10μm or more. Fine dust, the particle size of between 10 ~ 1μm. The small dust, the particles smaller than 1μm.
For larger dust and impurities from the current level of technology point of view is easy to get rid of, and remove those people are invisible to the naked eye, generally 0.3 ~ 5μm lower limit for the measurement of dust particles is more difficult. This requires the system to filter, clean means to remove the dust. The purpose of the use of filters to reduce pollution, but also a system of pollution filters.
With the improvement of clean technologies in recent years, a large number of outstanding foreign brand filter, filter, and production systems were introduced, although some of the existing filter itself does not cause pollution, but only if we understand and are familiar with the distribution of particles and particle filter technology, to understand and master the use of a variety of filter characteristics in order to improve the cleanliness of the system, and produce no pollution filters. This understanding, both for the user, or manufacturer are important.
Choose what kind of filter, what kind of filter material, can effectively remove the dust particles, it is also our common concern. 2 compressed air filter compressed air in the choice of the two main pollutants, one is sucked into the compressor of the air pollutants, of which 80% of the diameter below 2μm; the other is the compressor out of material, was Smoke state, will become open to dissipate 0.01 ~ 0.8μm aerosol. General nature of the filter can remove most of the liquid and solid material particles, the particle size is generally greater than 1μm, but to get rid of very tiny solid particles and oil and water aerosols, it is necessary to use high efficiency filters, which technically more complex.
In terms of its method and mechanism for any kind of rigorous physical classification is impossible. For example: inertia, gravity separation, centrifugal separation of direct interception Brownian diffusion deposition eddy diffusion heat condensed static magnetic analysis of sediment deposition Brown unite in a turbulent wave pool where, for specific types of particles, the only one mechanism plays a dominant role, but most where is the combined effect of multiple mechanisms. Generally speaking, mainly by direct interception, inertial impact, diffusion, or Brownian motion and thermal pool and so on.
Directly aimed at blocking air flow in the larger particles (diameter of 1μm or more generally), the process of inertia, the interception will occur simultaneously, because the solid-liquid particles entrained air flow through the filter, the particle weight and speed as role, so that air can not be synchronized quickly change direction, so it is impossible that the winding path through the filter, which hit the filter on the filter to capture particles, so the flow of solid particles, their course this will end.
And liquid particles is not exactly the same, flow through the filter, the tiny particles will tend to build, and finally brought together in one place, combined with the larger droplets, was push the filter outside of the formation of a saturated liquid zone and then discharged outside the device, which is coalescing filters.
This filtering can remove solid particles larger than 0.01μm, if less than full weight of 0.01/106 pollutants, then the flow of solid, liquid contaminants can be fully removed. For a good filter should be able to meet the following requirements: high filtration efficiency, the general should be able to reach 99.99%; while resistance to ensure that the filter gas pressure, flow rate changed little. Filter itself should be able to withstand not only the structure corresponding to the pressure and tightness better.
To ensure that the filter efficiency, filter itself to have a certain mechanical strength to withstand a certain pressure, but also to the impact of air resistance, the use of the process is not broken, lint, dregs and not oxidation or surface stripping phenomenon.
In addition, longer filter life, replacement, cleaning to be convenient. Compressed air filter according to the form of filter structure can be divided into "depth" filter, "mesh" filter, or depth, combined with mesh-type filters. "Depth" filters for the chaotic multi-filter pad fibers, porous sintered powder metallurgy and ceramics, its function is to create a winding flow path, so that when air was passed to capture dust particles.