In the water treatment process, the activated carbon filter is used for the adsorption of organic matter and the adsorption and removal of excess chlorine (residual chlorine), the former removal ability is poor, usually 50%, the latter is very strong, can completely remove residual chlorine, this is due to the adsorption of residual chlorine, but also its own chlorinated effect.
The adsorption capacity of activated carbon has been used for oral adsorption of intestinal bacteria and the treatment of bacterial dysentery, in the First World War, chlorine gas was used as a weapon of mass destruction, activated carbon is the main toxic gas adsorbent in gas masks, ion exchange resin is widely used, activated carbon is widely used in chemical desalination systems, large units are sensitive to the corrosion of organic acids, so the configuration of activated carbon bed is more. Activated carbon adsorbs nutrients in water and can become a hotbed for bacterial microorganisms, and the microbial film has a greater impact on the resistance of water, so it should be regularly backwashed and decontaminated. If backwashing does not work, sterilization should be performed.
In fact, a reasonable backwashing system arranged according to the turbidity of the influent is more practical, because the microbial film and microbial slime are difficult to clean, air scrubbing is necessary. A thermal power plant uses seriously polluted river water as raw water, and the bacteria, algae and microorganisms in the water are seriously polluted to the filter, and the operating time and backwash time of the siphon filter are flat; The activated carbon filter cannot be used, and the mixed bed is clumped by slime and cannot be regenerated in layers.
In order to ensure the output of water, the particle size of the filter material of the siphon filter is enlarged from about 1mm to 2mm and 3~4mm, and the mixed bed is changed to a secondary male bed and a secondary negative bed for desalination, and the quality of the effluent decreases, but it meets the water consumption of heating. The final solution is to use part of the tap water to alleviate the trouble caused by river water pollution, so when the activated carbon filter is blocked by bacteria and algae, in addition to strengthening the backwash to ensure that the pressure difference is within the specified range, sterilization is important, but it should be solved from the source.
