Second and third stages: Pre-activated carbon: The third stage of some low-grade water purifiers is also PP cotton, and activated carbon removes chlorine and organic impurities. It can also absorb the peculiar smell, color and smell produced by organic matter in water.
The fourth stage: ultrafiltration or reverse osmosis membrane: the membrane can remove bacteria, viruses and spores from water.
Stage 5: Post-activated carbon device: further improve the taste and remove the odor.
Water purifier, also known as water purifier and water purifier, is a water treatment equipment that deeply filters and purifies water quality according to water requirements. Water purifier usually refers to a small household purifier. Its technical core is the filter membrane in the filter element device. At present, the main technologies come from ultrafiltration membrane, RO reverse osmosis membrane and nanofiltration membrane.
Extended data:
Water purifiers can be divided into gradual tightening water purifiers and self-cleaning water purifiers according to pipeline design grades. The traditional water purifier is a gradually tightening water purifier. Its internal pipeline is designed as a loose filter element at the front and a tight filter element at the back. It consists of PP melt-blown filter element, granular carbon, compressed carbon, RO reverse osmosis membrane or ultrafiltration membrane, and post-activated carbon. Usually, these five stages are connected end to end.
Trapped and deposited in the filter element, it needs to be disassembled and cleaned manually regularly to ensure the normal operation of the machine. The other is a more advanced self-cleaning water purifier, which has designed two channels and added a washing water channel.
The washing water of ordinary domestic water washes the raw water side of the machine filter element, especially the membrane filter element, when it passes through the passage, so as to achieve the function of self-cleaning, and the intercepted dirt can be quickly discharged in time by using the water originally flowing from the first and second sections when the washing faucet is turned on and off. The structure design is reasonable, which saves the trouble of manual disassembly and cleaning, avoids the secondary pollution of the mechanism itself and reduces energy consumption.
References:
Baidu encyclopedia-water purifier