Activated carbon needs to play a role of water purification, and it takes time to carry out adsorption. Therefore, experts believe that the water purifier production plant should improve the design of activated carbon filter or activated carbon filter, increase the contact time of water and activated carbon as much as possible, contact time = carbon column length / water flow rate in the carbon column, increase the length of the carbon column and The amount of activated carbon and the reduced flow rate of water can prolong the contact time of water and activated carbon, and improve the water purification effect and effluent quality of activated carbon.
Household activated carbon water purifier
In the urban construction industry standard CJ3023-1993 "activated carbon water purifier", no specific data such as contact time or water flow rate is given, but 5.2.1 stipulates that the ratio of the effective height to the diameter of the filter column of the activated carbon filter is 2~ 6 is appropriate, in fact, it is also to increase the height of the carbon column, extend the contact time of water and activated carbon, and prevent water from penetrating without contact with carbon. Some water purifiers use a multi-stage activated carbon filter, which is also the role. In short, the longer the contact time of activated carbon with water, the better the adsorption effect.
Large activated carbon water quality processor
In the mechanical industry standard JB/T2932-1999 "Technical Conditions for Water Treatment Equipment", the flow rate of water in the activated carbon filter should be ≤20m/h for the purpose of removing free chlorine, and the effluent water quality is residual chlorine<0.1mg/L. For the purpose of removing organic matter, the flow rate of water in the activated carbon filter should be ≤10m/h, and the effluent water quality is CODMn<2mgO2/L. In the pretreatment of large reverse osmosis unit, the residual chlorine and organic matter should be removed, and the flow rate is 10m/h. If the height of the activated carbon filter layer is 1m, the contact time between water and activated carbon is 0.1h, that is, 6 minutes.
Particle size pass rate of activated carbon
1. Powdered activated carbon: Generally, more than 90% pass through 80 mesh standard sieve or activated carbon with particle size less than 0.175 mm, which is called powdered activated carbon or powdered carbon.
2, granular activated carbon: also known as amorphous granular activated carbon, usually activated carbon with a particle size greater than 0.175mm is called granular activated carbon.
3. Columnar activated carbon: also known as cylindrical charcoal. The columnar charcoal has solid and hollow fractions. The hollow columnar charcoal is one or several regular pores in the columnar charcoal.
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