Why should activated carbon filters pay attention to sterilization?
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). Chlorine, which is due to the effect of being chlorinated by itself while adsorbing residual chlorine.
The adsorption capacity of activated carbon has been used for oral absorption of intestinal bacteria to treat bacillary dysentery. In the First World War, chlorine gas was used as a weapon of mass destruction, and activated carbon was the main gas mask. Activated carbon is widely used in chemical desalination system after ion exchange resin is widely used as the poisonous gas adsorbent. Large units are sensitive to the corrosion of organic acids, so there are more people equipped with activated carbon beds. Activated carbon absorbs nutrients in water and can become a breeding ground for bacteria and microorganisms. The microbial membrane has a great influence on the resistance of water. Therefore, backwashing and decontamination should be carried out regularly. If backwashing does not work, sterilization should be performed.
In fact, it is more practical to arrange a reasonable backwash system according to the erosion degree of the influent water. Since it is difficult to clean the microbial film and the microbial slime, it is necessary to take air scrubbing. A thermal power plant uses seriously polluted river water as raw water, and the mixed bed is formed into agglomerates by sticky mud and cannot be regenerated in layers. In order to ensure the output of water, the particle size of the filter material in the siphon filter was enlarged from about 1 mm to 2 mm and 3-4 mm, and the mixed bed was changed to a secondary anion bed for desalination. water consumption for heating. The final solution is to use some tap water to alleviate the troubles caused by river water pollution. Therefore, when the activated carbon filter is fouled by bacteria and algae, in addition to strengthening backwashing to ensure that the pressure difference is within the specified range, sterilization is important. , but it should be solved from the source.
In the water treatment process, strain pretreatment should be done according to the actual situation during the operation of the reverse osmosis device. In the risk assessment of a power plant in Inner Mongolia, the plant shutdown protection is only for hot furnace water discharge treatment, which is far from enough under normal circumstances, but this countermeasure is recognized. When the power plant staff asked whether they should take protective measures such as film formation, they pointed out that for the plant located in desert and arid areas, since the local relative humidity is lower than 40% all year round, the use of hot furnace water discharge can already play a good role in stopping the furnace. For the activated carbon filter, as long as the pressure difference meets the regulations, the CODMn removal rate is not less than 30%, and no more maintenance is required.
