Different water purification materials will produce different purification effects , and consumers can choose a suitable water purifier according to their desired purification effect . , Let's analyze the advantages and effects of three types of water purifier filters commonly found on the market . The first type of water purifier filter : The water purifier using PP cotton can only perform primary filtration to filter sediment and rust , which are macroscopic particles that are visible to the naked eye . Can not solve the actual problem , bacteria and viruses this does not play any role , if not timely change , may produce secondary pollution , gain more than gain , there is pp cotton water purifier , we must often replace the pp cotton . This water purifier is cheaper than other water purifiers . The second type of cartridge filter housing : Activated carbon water purifier are better than PP cotton . Because there are many channels inside the activated carbon , its adsorption capacity is particularly strong . It can not only filter sand , rust , and other macroscopic particles that are visible to the naked eye . It can also filter impurities such as tiny solid particles and odor , chlorine , heavy metals and other harmful substances . The purified water can only become purified water , but not a good quality softened water . The third type of water purifier filter : Water purifier RO membrane is a relatively high-quality filter on the market today , which is better than the above two functions . The membrane has a pore size of 0.0001 μms , removes all impurities other than water molecules except 99.0% of the water , and the water is purified water , which solves the treatment of highly polluted water and high-hardness water . The water purifier RO membrane relies on the pressure exerted by the machine on the raw water to allow water molecules in the source water to pass through the RO membrane . In addition , all harmful substances such as fine impurities , excessive inorganic salts , organic matter , heavy metal ions , bacteria , viruses , pesticides , and chloroform wastes in raw water are trapped , and these harmful foreign substances and salt are discharged through the continuous discharge of concentrated water . , Is a very clean drinking water . From the comparison of the above three water purifier filters , the effect of the RO membrane is excellent .
The main classification filter is divided into gravity filter , vacuum filter and pressure filter according to the method of obtaining the filtration driving force . Gravity is the driving force of filtration by means of the gravity and differential pressure of the suspension on the filter medium , which is generally intermittent operation , such as a sander . Vacuum forms a negative pressure in / on the outlet of the filtrate as a driving force for filtration . The absolute vacuum pressure in / on the industrial vacuum filter is (2.5 to 8.0 ) × 105 Pa . The temperature of the suspension during filtration should be lower than the vaporization temperature of the filtrate under operating vacuum . This filter is divided into two kinds of intermittent operation and continuous operation . A batch-operated vacuums / vacuumed filter filters various concentrations of the suspension . The vacuum filter is filled with a suspension in the container housing . The Cartridge filter housing leaves with filter cloths on both side are immersed in the suspension , and the inner space of the filter leaflet's communicates with the vacuum system . After the filtrate is sucked out , it is led out of the pipe and the filter residue accumulated on the surface of the filter blade is removed after shutdown . Continuously operated vacuum filters are suitable for filtering thick suspensions containing more solider particles . The drum vacuum filter , the inner filter drum vacuum filter , the disc vacuum filter , and the tipping vacuum filter operate in a similar manner . The entire filter surface is divided into a plurality of separated filter chambers , and each of the rotary filter chambers are connected to each fixed pipe through a distribution valve in order to suck out the filtrate , washing liquid , or compressed air in the filter chamber . Each filtration chamber completes the whole process of filtration operation by one revolution , and the filtration of multiple filtration chambers forms a continuous filtration . The structure of the belt vacuum fil