Source Water tank Sand Filter Carbon Filter Belt Softening Reverse Osmosis Fully Automatic Water Filtration Machinery
Product description
This device is an integrated deep water purification system designed through the entire process of “source water buffering → pretreatment → softening → reverse osmosis desalination”, targeting complex water sources with high turbidity, high hardness, and pollutants (such as groundwater and surface water) for purification. It is widely used in industrial production, commercial centralized water supply, and rural safe drinking water projects. The following provides a detailed explanation of the system composition, working principle, core advantages, and application scenarios:
1、 Core components and functions of the system
1. Source Water Tank
Construction: Made of PE or 304 stainless steel, equipped with a liquid level sensor, mixing device (optional), and overflow/discharge outlet.
Core role:
Cache source water: Balance fluctuations in water supply (such as intermittent well water pumping and unstable tap water pressure) to ensure continuous water inflow into the subsequent system;
Homogeneous water quality: By stirring and mixing source water from different time periods, the impact of fluctuations in parameters such as water temperature and turbidity on the pre-treatment effect is reduced;
Protect front-end equipment: automatically shut down when the liquid level is too low to prevent damage to the water pump due to idling.
2. Sand Filter
Construction: Pressure bearing filter tank (made of fiberglass or stainless steel), filled with gradient quartz sand (1-2mm coarse sand on the upper layer and 0.5-1mm fine sand on the lower layer), equipped with a fully automatic backwash valve group.
Core role:
Physical interception: Remove suspended impurities such as sediment, rust, algae, and colloidal particles from the source water, reducing turbidity from 20-50NTU to below 1NTU;
Pre treatment protection: To reduce the load on subsequent carbon filtration and softening systems, and to avoid large particle impurities blocking the filter material or scratching the membrane components.
Operating characteristics: When the inlet and outlet water pressure difference is greater than 0.05 MPa or timed for 12 hours, automatic backwashing (water flushing+air flushing optional) is initiated to restore the filtering capacity of the filter material.
3. Carbon Filter
Construction: The filter tank is filled with coconut shell granular activated carbon (specific surface area ≥ 1000m ²/g), and some systems are equipped with columnar activated carbon to enhance durability.
Core role:
Adsorption purification: removes organic matter (such as pesticides, humic acid), residual chlorine (disinfectant residue in tap water), odors, and pigments from water;
Membrane protection: Reduce the residual chlorine in the influent to ≤ 0.05mg/L to avoid oxidative damage to the subsequent reverse osmosis membrane;
Improving taste: adsorbing odor causing substances to enhance the comfort of drinking water.
4. Belt Softening System
Construction: Continuous operation of ion exchange resin filter belt, regeneration solution (8-10% NaCl solution) tank, driving motor, and automatic control system.
Core role:
Removal of hardness: By exchanging calcium (Ca ² ⁺) and magnesium (Mg ² ⁺) ions with resin filter strips in water (reaction equation: Ca ² ⁺+2NaR → CaR ₂+2Na ⁺), the water hardness is reduced from 500mg/L (calculated as CaCO ∝) to ≤ 5mg/L;
Continuous operation: The filter belt circulates through the softening zone (working) and regeneration zone (saltwater flushing to restore activity) without stopping for regeneration, with a processing capacity of up to 50-500 m ³/h;
Scale prevention protection: prevents hardness ions from forming scale on the surface of the reverse osmosis membrane, and extends the membrane life (from 1-2 years to 3-5 years).
5. Reverse Osmosis (RO) system
Core structure:
Precision filter (5 μ m PP filter element, intercepting small impurities such as resin fragments);
High pressure pump (316 stainless steel multi-stage centrifugal pump, providing 1.0-1.5MPa pressure);
Reverse osmosis membrane module (roll type composite membrane, such as Dow BW30FR, desalination rate ≥ 99%);
Fully automatic control valve group (regulating recovery rate, concentrated water discharge).
Core role:
Deep desalination: intercepting over 99% of soluble salts (such as NaCl), heavy metals (Pb ² ⁺, Cr ⁶⁺), bacteria, and large organic compounds;
Produce pure water: The conductivity of the produced water is ≤ 50 μ S/cm (when the TDS of the raw water is less than 2000mg/L), meeting industrial or drinking standards.
6. Fully automatic control system
Core components: PLC controller+touch screen, pressure/flow/conductivity sensors, electric valve.
Function:
Full process linkage: source water tank level → sand filter backwash → carbon filter operation → softening regeneration → RO water production → automatic connection of produced water storage;
Intelligent protection: automatic shutdown alarm when high voltage overload, low voltage water shortage, or water quality exceeds the standard;
Data recording: Real time display of water production, energy consumption, water quality and other parameters, supporting historical data query and fault tracing.
2、 System workflow
Source water buffer: Source water (such as well water and surface water) enters the source water tank, and the system is started after the liquid level reaches the standard.
Pre treatment purification:
Sand filter removes suspended impurities and reduces turbidity;
Carbon filters adsorb organic matter, residual chlorine, and odors, improving the chemical properties of water quality.
Softening and hardness removal: The belt softening device continuously removes calcium and magnesium ions, reduces water hardness, and prevents subsequent scaling.
Precision protection: A 5 μ m precision filter intercepts residual small particles and protects the RO membrane.
Reverse osmosis desalination: After being pressurized by a high-pressure pump, water passes through an RO membrane, pure water enters the production water tank, and concentrated water is discharged or reused.
Intelligent monitoring: The system adjusts operating parameters in real-time, automatically completes maintenance such as backwashing, regeneration, and cleaning, ensuring stable water production.
3、 Core advantages and application scenarios
Core advantages
Full water quality adaptation: capable of treating complex water sources with high turbidity (>30NTU), high hardness (>500mg/L), and chlorine/organic compounds;
Efficient and energy-saving: The belt softening salt consumption is reduced by 20% compared to traditional resin tanks, and the energy consumption of the RO system variable frequency high-pressure pump is reduced by 15% -20%;
Unmanned: Fully automated from water intake to production, suitable for remote areas or industrial continuous production scenarios;
Long life operation: multi-stage pretreatment+anti fouling membrane design, extending the life of core components (RO membrane, softened filter belt) by more than 50%.
Typical application scenarios
Industrial water: electronics plants (cleaning water), food processing plants (ingredient water), boiler feedwater (anti scaling requirements);
Commercial water supply: centralized drinking water systems for hotels, schools, and hospitals (treating municipal tap water or groundwater);
Safe drinking water in rural areas: high hardness and high turbidity well water purification, meeting the GB 5749-2022 “Sanitary Standards for Drinking Water”;
Wastewater reuse: Treat industrial wastewater (containing salt and suspended solids) and reuse it as supplementary water for greening or production.
summarize
The system solves the purification problem of complex water sources through collaborative design of “source water caching → preprocessing → softening → reverse osmosis”, with a combination of processing depth, automation level, and operational economy. Its core value lies in integrating dispersed water treatment units into efficient closed-loop systems, providing stable and safe pure water resources for different scenarios, and representing integrated solutions in the field of modern water treatment.
