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How to purify tap water? The process of purifying water in the water plant is: River water → adding flocculation (alum) → precipitation → filtration → adsorption (activated carbon) → disinfection → water supply companies use physical and chemical double-layer functions to disinfect tap water under normal circumstances,It is best not to drink the disinfected tap water directly.Fish and the like can be exposed to the sun for 3 days,The volatile substances such as hydrogen chloride will evaporate.For drinking,It's better to boil for more than 5 minutes,When I put 10 points in the air, I once saw a teacher's water purification device: make a water filter,Can be made into a rectangle,A little bigger,Leave a mouth at the bottom,Put a few layers of filter,On the water tank,Filled with a clean mixture of coarse river sand and charcoal, install a purifier in the faucet,And,It's because your kettle has scale,
What are the classification of air purifier working principle? The working principle of air purifier is relatively simple,Is the filter fan,The indoor dirty air is sucked into a closed air purifier,Filter the impurities in the air through a layer of filter,Leaving clean air back into the room,So cycle a few times,Know that the air is clean.At present, the form of air purification is roughly divided into three categories: Passive filtering (filter filtering,Such as olive air purifier), active filtration (ion filtration,Such as the Bayon air purifier) and the filtration of the two compound (such as sharp net ion group ).Filter type.Such air purifiers use porous filter materials,Trap and collect particles suspended in the air.It usually uses HEPA filter or activated carbon filter,Can filter small particles,The role of absorbing harmful gases such as formaldehyde, benzene and ammonia.If the indoor air is not particularly dirty,Use 6-per average day-8 hours,The service life of activated carbon is only about
