Brief History of filter In ancient China, filtration technology was applied to production,In 200 BC, paper was made from plant fibers.Cai Lun improved the paper-making law in 105 AD.He swung the plant fiber pulp over a dense thin bamboo curtain in the process of making paper.Water filtered through bamboo curtain gaps,A thin layer of wet pulp is left on the bamboo curtain,Paper is made after drying.Most of the earliest filtering is gravity filtering,Later, the filtration speed was improved by pressurized filtration,Then there is vacuum filtration.The drum vacuum filter invented in the early 20 th century realized the continuous filtration operation.Since then,Various types of continuous filters appear one after another.The filter operated intermittently (such as plate and frame filter press, etc.) has been developed due to the automatic operation,The filter area is getting bigger and bigger.In order to get the filter slag with low moisture content,The filter of mechanical pressing has been developed.Structure
Which is good before the water purifier? No need to be too expensive, no good conceptPp cotton can be removed and replaced easilyThe water purifier mainly filters the sediment, rust, etc. in the water.