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Xiao Ming poured the turbid lake water sample into the beaker. after standing for a while, it was filtered by the device shown in the figure. Excuse me: (1) there is a mistake in the figure? (1) there is no glass rod drainage in the picture,If the glass rod is not used for drainage,Will cause the liquid to splash out when filtering,Even damage the filter paper;(2) if the filter paper is not close to the inner wall of the funnel,Will lead to slow filtering;(3) damaged filter paper,Then the mixture will directly enter the filter without filtration;The liquid level to be filtered is higher than the edge of the filter paper,The liquid mixture also flows down from the outside of the filter;The beaker of the filter is not clean,The leachate will also be turbid;(4) hard water and soft water can be identified with soapy water,The foam is a lot of soft water,(1) no glass rod drainage;(2) the filter paper is not close to the inner wall of the funnel;(3) damaged filter paper;The liquid surface is higher than the
Is the purification method of the household fresh air system selected for physical filtration or electrostatic dust collection? Consumers who don't know much about the household fresh air system will inevitably encounter questions in choosing the appropriate model and its purification method. from the current market, the air filtration method of the household fresh air system is seen, the following five technologies are used in the fresh air system for PM2.5 filtration:1. physical filtration: an efficient HEPA filter is used to intercept harmful particles in the air entering the room.2. electrostatic dust collection: the principle of high-pressure electrostatic adsorption is used to remove particulate pollutants in the air. Advantages: low maintenance costs later. Disadvantages: high one-time investment, unstable performance, trace ozone and certain potential safety hazards. The dust collection module needs to be cleaned regularly, otherwise the dust collection capacity will be lost.3. catalytic t
