Direct drinking water equipment system design plan description and process flow introduction

Description of design scheme of direct drinking water system

  1. The first-stage pretreatment system: the quartz sand multi-media filter is used. The main purpose is to remove the sediment, rust, colloidal matter, suspended matter and other particles in the source water that are harmful to the human body above 20 m. The system can automatically (Manually) Perform a series of operations such as backwashing and forward washing.
  2. The second-stage pretreatment system: using nut shell activated carbon filter, the purpose is to remove the pigment, peculiar smell, biochemical organic matter in the water, reduce the residual chlorine value of the water, pesticide pollution and other pollutants harmful to the human body. The system can automatically (manually) perform a series of operations such as backwashing and forward washing.
  3. The third-level pretreatment system: the use of cation resin to soften the water, mainly to reduce the hardness of the water, remove the calcium and magnesium ions (the main components of the formation of scale) in the water, which can effectively extend the service life of the reverse osmosis membrane, and Intelligent resin regeneration can be carried out.
  4. The fourth-stage pretreatment system: adopts a 5um pore size precision filter to further purify the water and optimize the turbidity and chromaticity of the water. Ensure the water inlet conditions of the RO system, ensure the quality of the water produced by the equipment, and extend the service life of the equipment.
  5. Reverse osmosis (ultrafiltration) equipment host: Reverse osmosis (ultrafiltration) technology is used for deep desalination (imported US reverse osmosis membrane) to remove calcium, magnesium, lead, mercury and other heavy metal substances harmful to humans and other impurities, and reduce The water hardness and the desalination rate are over 99%, producing pure water that meets national standards.
  6. Micro-filtration device: The installation of this device is mainly to prevent particulate resin particles from filtering out of the cloth water and causing secondary water pollution. This is mainly used in occasions with particularly high water quality.
  7. Sterilization system: Adopt ozone generator (or ultraviolet sterilizer) to reduce secondary pollution of bacteria, and the sterilization rate can reach more than 99%. At the same time, ozone is dissolved in water to form oxygen-rich water to ensure the pure and fresh water. A water-gas mixer is used to fully mix ozone with water to achieve the best concentration ratio.

Water inlet parameters of direct drinking water system:

Source water: urban tap water, groundwater (water samples need to be tested), inlet water pressure>0.3MPa, inlet water conductivity <800us/cm; when inlet water conductivity>800us/cm, dual-stage reverse osmosis is recommended.
1. Design parameters: more than 50 gallons per day.
2. Water discharge standard: National Level 1 or Level 2 Ultrapure Water Standard for Electronics

Process flow of direct drinking water system:

Adopt reverse osmosis method: source water tank → source water booster pump → multi-media filter → activated carbon filter → positive resin softener → precision filter → primary reverse osmosis (RO) system → ultraviolet sterilizer → water point
Adopt ultrafiltration method: source water tank → source water booster pump → multi-media filter → activated carbon filter → positive resin softener → precision filter → ultrafiltration system → ultraviolet sterilizer → water point

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