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How can I test the filter resistance? The resistance of the primary air filter increases with the increase of air flow,By increasing the area of filter material,Can reduce the relative wind speed through the filter material,Reduce the resistance of the primary air filter.The dust whose dynamic performance is captured creates additional resistance to the airflow,So,The resistance of the primary air filter in use is gradually increasing.The dust caught under arrest forms new obstacles,So,Filter efficiency improved slightly.Most of the captured dust gathered on the windward surface of the filter material.The larger the filter area,The more dust you can hold,The longer the life of the primary air filter.The more dust on the service life filter material,The greater the resistance.When the resistance is so large that the design is not allowed,The service life of the xf2nby primary effect air filter is over.Sometimes,Excessive resistance will dissipate the dust already captured on the primary air filter,When t
Water is the source of life. human daily life and industrial and agricultural production are inseparable from water. (1) in order to explore the process of 'water purification', a chemical Interest Group, (1) 1 add alum to the water sample and stir and dissolve it,After a period of quiet,Filter,Remove small solid particles. the main instruments necessary for filtration operation are: iron frame, Beaker, glass rod and funnel with iron ring;During the experiment, it was found that the operation was much longer than expected,The possible reason is that there are too many insoluble substances on the filter paper, bubbles between the filter paper and the funnel wall;2 Add activated carbon to the filter,Remove the color and odor in the water sample by its adsorption,The process is a physical change;(2) the hardness of water can be reduced by heating the boiling method in life,Calcium carbonate carbon dioxide water,Is more and more,So it belongs to the decomposition reaction;The solubility of calcium bicarbo
