Process Flow

1. Raw Water Tank
Stores raw water to allow large sediment particles and other settleable substances in the water to precipitate. It also buffers the impact of unstable water pressure in the raw water pipeline on the water treatment system (e.g., pressure sensor responses due to excessively low or high water pressure).
2. Raw Water Pump
Maintains a constant water supply pressure and stabilizes the water supply volume.
3. Multi-Media Filter
Utilizes a filter with multiple filtration layers, primarily aimed at removing particles larger than 20um from the raw water, such as sediment, rust, colloidal substances, and suspended solids. It can be operated manually via valves or automatically via a controller for backwashing, forward washing, and other operations. This ensures the quality of the water produced and extends the equipment's service life.
4. Activated Carbon Filter
The system employs a shell-based activated carbon filter. Activated carbon not only adsorbs electrolyte ions but also performs ion exchange adsorption. Through activated carbon adsorption, the potassium permanganate oxygen consumption (COD) can be reduced from 15mg/L (O₂) to 2–7mg/L (O₂). Additionally, due to adsorption, the concentration of surface-adsorbed replicas increases, which also plays a catalytic role. It removes pigments, odors, a large amount of biochemical organic matter, reduces residual chlorine levels, pesticide pollutants, and eliminates trihalomethanes (THM) and other contaminants from the water. The equipment also features a self-maintenance system with low operating costs.
5. Ion Softening System/Dosing System
For the reverse osmosis (R/O) unit, to manage the concentrated discharge of dissolved solids and the utilization of freshwater, and to prevent the concentration product of substances such as CaCO₃, MgCO₃, MgSO₄, CaSO₄, BaSO₄, SrSO₄, and SiSO₄ at the concentrated water end—particularly on the concentrated water side of the last membrane module of the RO unit—from exceeding their equilibrium solubility constants and crystallizing, which would damage the membrane's inherent properties, an ion softening device or an appropriate amount of scale inhibitor should be used before the water enters the reverse osmosis membrane module to prevent the crystallization of carbonates, SiO₂, and sulfates.
6. Precision Filter
Employs a precision filter to remove residual suspended solids, non-straight particles, and colloids from the incoming water, ensuring safer and more reliable operation of subsequent equipment like the RO system. The filter element is a 5um melt-blown cartridge designed to remove impurities larger than 5um that were missed by the previous filtration unit, preventing them from entering the reverse osmosis device and damaging the membrane surface, thereby preserving the membrane's desalination performance.
7. Reverse Osmosis System
The reverse osmosis unit applies sufficient pressure to separate the solvent (usually water) from the solution through a reverse osmosis membrane (or semi-permeable membrane). This process is called reverse osmosis because it is the opposite of natural osmosis. Reverse osmosis can adapt to raw water with various salinity levels, especially in high-salinity water treatment projects, delivering excellent technical and economic benefits. It offers high desalination rates, high recovery rates, stable operation, small footprint, and ease of operation. While desalinating, reverse osmosis equipment also removes most bacteria, colloids, and high-molecular-weight organic matter.
8. Ozone Sterilizer/UV Sterilizer (Optional)
Eliminates bacteria resulting from secondary contamination, thoroughly ensuring the sanitary standards of the finished water.
Raw Water → Raw Water Tank → Raw Water Pump → Multi-Media Filter (Quartz Sand Filter) → Activated Carbon Filter → Soft Water Processor (Scale Inhibitor Dosing Device) → Precision Filter → High-Pressure Pump → Primary Reverse Osmosis (RO) Unit → UV Sterilization Unit (Ozone Sterilization Unit) → Point of Use

Comparison and Advantages Over Common Market Products

① Similarities:
Pure water reverse osmosis equipment features low-pressure protection, high-pressure protection, water-full stop function, as well as automatic shutdown upon startup and shutdown.
② Advantages:
LCD display that shows the main unit’s working status in text, such as "Regeneration Indicator," "Water Full Indicator," "Alarm," etc., providing a more intuitive reflection of the reverse osmosis main unit’s operational status.
Equipped with thermal relays that provide thermal overload protection. When the raw water pump and high-pressure pump reach a certain temperature, the thermal relay automatically senses this, and both pumps stop operating, thus protecting the pumps.
In the market, under no-water protection status during regeneration, the high-pressure pump can stop, but the raw water pump cannot. Our company’s reverse osmosis system, under PLC control, allows both the high-pressure pump and raw water pump to stop during regeneration, offering additional pump protection.
A bypass valve is installed between the inlet and outlet of the high-pressure pump, which serves to recirculate and relieve pressure, allowing adjustment of the outlet water pressure. This ensures that the pressure before the pump does not become too high, guaranteeing safe and stable operation of the high-pressure pump.
Our company’s reverse osmosis system uses a PLC control system, which can be programmed according to specific requirements of different environments and locations, meeting customers' practical functional and performance needs for the reverse osmosis equipment.