PP filter cartridge is also called PP meltblown cartridge, meltblown filter cartridge made of polypropylene ultrafine fiber fusion entanglement, fiber in space randomly formed three-dimensional for the empty structure, microporous aperture along the filtrate flow direction is a gradient of distribution, set the surface, deep, fine filtration and integration of microporous membrane as a filtration medium, can retain the sand, rust, scale and other impurities in the water.
Its filtration precision ranges from 0.5μm to 20μm, under the same size, the heavier the weight, the more sufficient material, density, filtration effect is relatively good.PP cotton cartridge is divided into ordinary PP cotton and folded PP cotton two kinds of folded PP cotton production cost is relatively high, with better dirt holding capacity and filtration efficiency.
Under normal circumstances, the use of precision filters within the service life of the residual suspended solids in the feed water, non-curved particles and colloids and other substances to remove, so that the RO system and other subsequent equipment to operate more safely and reliably. Prevent impurities from entering the reverse osmosis device to damage the membrane surface, thereby destroying the membrane desalination performance.
RO Machine
RO System
Currently on the market to filter particulate matter not dissolved in water filter cartridge, ordinary PP cotton, ultrafiltration membrane, folded PP cotton, RO membrane, etc., this class of particulate matter not dissolved in water filter cartridge, the main difference is the filtration accuracy and filtration area.
Ordinary PP cotton surface is flat, the surface or pinprick holes, or embossed, these treatments are designed to increase the filtration surface area.PP cotton filtration precision is mostly 1-10μm, the internal structure contains dirt - retention layer - fine filtration layer, in fact, it is loose outside and tight inside, the outer ring is fluffy, the filtration precision of about 5μm, which is good for dirt and dirt. The inner circle is tight, filtration accuracy of about 1 micron.
Ordinary PP cotton is mainly used in the first level, filtering target sediment, rust, in some bad water quality, such as the roof of the building with a water tank, and can be seen with the naked eye red insects and some other insects, etc. PP cotton after a long time of use, the surface shows a red to brown to black changes to dark yellow or light brown will need to be replaced. Ordinary PP cotton is only suitable for water quality is particularly good areas, do not affect the daily use of water, plugged ordinary PP cotton, may encounter will be difficult to get out of the water.
Groove PP cotton, is a circle on the surface of a circle of grooves, grooves appear, increasing the surface area of about 1 times the loss of water pressure, water flow is smaller, the grooves hold dirt more and stronger. The same filtration accuracy is 1-5 microns, loose outside and tight inside structure. Groove PP cotton barrel ordinary PP cotton, mainly used in the first level, filtering target sediment, rust. Groove PP cotton for most areas of municipal tap water, water flow clear visual inspection without yellow mud water can be used.
After understanding the above information about the filtration area and filtration precision of PP cotton cartridge, we will encounter a new problem, that is, the choice of filtration precision, for the pre-treatment link, the smaller the filtration precision is the better? The answer is: no.
Now we take the big blue two-stage pretreatment cartridge selection as an example, we usually recommend that we use PP cotton cartridge to do pretreatment, here are different precision such as 1μm, 5μm, 10μm, in accordance with the feedback of users around the world and the industry's experience at the present time, 5μm cartridge is considered to be the best choice, although 1μm cartridge filtration precision is higher, but its easy to clog the problem will lead to more frequent Replacement, and in terms of the substance filtered out with 5μm cartridge difference is not obvious, even if the filtration accuracy to 1μm filtered out of this substance itself, will not be a lot more than 5μm, in addition, the back stage of the activated carbon cartridge, RO membrane in the further purification of water, so it is recommended that the pretreatment link has a precision of 5μm is enough. Because we need pretreatment in addition to filtering these large amounts of sediment particles colloid, but also have a relatively large flux, in this case to ensure that we can guarantee that the whole house water demand for water. So we recommend for this example selection with 5μm PP cotton cartridge.
In summary, we drink the water is filtered through the deep, using layers of progressive purification to effectively ensure the safety and purity of water quality. Raw water will first be filtered through the PP cotton cartridge larger impurities such as sediment and eggs, and then through the activated carbon cartridge filtration of residual chlorine in the water, odor, pesticide residues, and then flow to the reverse osmosis membrane part, through the precision filtration of 0.0001 μm, to filter out the water bacteria and micro-organisms, heavy metals, and so on. The entire process, from removing larger solid impurities to removing chlorine and odors to precision reverse osmosis membrane filtration, each step is designed to achieve a higher standard of water quality. In each level of filtration unit has its own filtration goals, if the subsequent need to remove all the impurities in the early filtration process, will not only affect the effectiveness of the layers of filtration, but also may lead to some of the cartridges due to clogging and failure, thus affecting the overall water quality. Therefore, the reasonable design of the filtration process and the effective cooperation of each link is the key to ensure the safety and purity of water quality.
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