The pretreatment stage is water purification equipment for the purification of the first stage water preparation, mainly composed of sand filter, active filter, filter, softener, through the pretreatment stage, suspended particles, most of the organic matter, colloid, chlorine and other impurities in the raw water is filtered, for subsequent water treatment provided a good quality foundation. In the daily use of the process, we should also deal with the pre treatment stage of the device regularly to ensure that its performance is still able to achieve the desired state. Specific maintenance is as follows:
1 sand filter, activated carbon filter: regular cleaning, according to the far water quality in general, with tap water as raw water, wash once a week, if the raw water as well water and river water and groundwater, once every three days to avoid flushing, sediment and particulate matter deposition and thus affect the filtering effect;
2 security filter: when the import and export pressure difference is greater than 0.06Mpa, the filter should be replaced in a timely manner, under normal circumstances, every three days should be removed from the filter to check and wash, replaced every 15 days;
3 softener: used for filtering heavy metal ions, softening water quality, regular washing, replacement filter.