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Media Filtration Characteristics
- Oct 17, 2016 -

Filtration characteristics of filter media include: retention of minimum particle size, particle retention efficiency, flow resistance, pollution receiving capacity, tendency to jam and cake separator.

(1) be able to withhold the smallest particle size. Media able to withhold the smallest particle size, users and manufacturers concerned about the problem.

(2) the particle retention efficiency. Particle retention efficiency is a function of particle size. Particle retention efficiency is decreased with particle size reduction. Small size, metal wire and monofilament polypropylene fabric retention efficiency is very low, and felt and multifilament polypropylene cloth is better.

It should be noted that any interception efficiency curve is strictly correspond to the experimental conditions. Including characteristics and concentration of solid particles and liquid properties (viscosity, pH value, polarity) and filter speed (flow rate per unit area).

(3) clean the flow resistance of the medium. In industrial applications, the flow resistance of the medium must be considered. Flow resistance of particle size affects both interception and the filter operation costs. Medium pore size and the number of holes per unit area, determines the flow resistance. In fact, Zhi accounted for only a fraction of the size, porosity, percentage porosity of both. Depending on the porosity of the material properties of the medium and medium manufacturing method, so the flow resistance of the different media varies greatly.

(4) the pollution receiving capacity. Pollution receiving capacity is liquid clear filter and important parameters of gas purification filters, filter press, is about to exceed the specified values gathered by the media before solids (dirt) to characterize. Pollution receiving capacity of the medium, its effective work time is long. To measure medium pollution receiving capacity, often by asking experiment (Challenge Teat). Measured pollution receiving capacity corresponds to strict experimental conditions, this is because the results depend not only on the inherent nature of the solid particles and concentration, but also on the nature of the liquid (viscosity, pH value and polarity), and the flow rate per unit area.