Municipal engineering water is generally from raw water. Raw water includes some groundwater, surface water, river water, etc. These waters generally contain a variety of impurities, among which the solid impurity content is the largest. If you want to use clean municipal water for engineering, you need to go through a series of filtration.
The general process is that the pump first pumps raw water into a soft water tank for water softening-carbon bed (after softening, then passes through an activated carbon tank to remove odors)-security filter-reverse osmosis-storage tank-terminal filtration device.
The security filter in this filtering system is used to filter impurities from 5μm to 10μm. Generally, a high-throughput filter element is used, and the flow rate must reach 100m³ / H. Only in this way can the filtering requirements be met.
The terminal filter is also a security filter. The non-filter is a high-precision polyethersulfone sterilization filter or a high-precision polypropylene filter.