2 Tons of Ultrafiltration and 1 Ton of Reverse Osmosis Filtration Purification Water System Per Hour

Core Design Logic of 2:1 Flux Matching

1. Guarantee stable water supply for RO: The ultrafiltration effluent is far more than the RO water intake demand, avoiding the pressure fluctuation and water supply interruption of the RO system caused by the temporary flux reduction of the ultrafiltration membrane due to slight pollution, and ensuring the continuous and stable operation of the RO system.
2. Optimize RO inlet water quality: The excess ultrafiltration effluent is used as flushing water for the ultrafiltration membrane itself (automatic backwashing) and the front pipeline, which keeps the ultrafiltration membrane surface clean for a long time, and the RO inlet water always maintains low turbidity (SDI≤3) and low organic matter content, fundamentally reducing the scaling and pollution risk of the RO membrane.
3. Improve system flexibility: The redundant ultrafiltration flux can be used as raw water for direct use (such as domestic miscellaneous water) when the pure water demand is low, realizing the classification and reuse of water resources (ultrafiltration water for miscellaneous use + RO pure water for high-standard use), and improving the overall water utilization rate of the system.

Whole Process Working Principle

1. Raw water pretreatment: Raw water is pumped into the coarse filter and precision filter to remove large particle impurities (sand, rust, sediment) above 5μm, protecting the ultrafiltration membrane from physical scratching; the optional automatic dosing device (coagulant) can be added for high-turbidity raw water to improve the ultrafiltration impurity removal efficiency.
2. 2m³/h ultrafiltration deep purification: Driven by raw water pressure, the pretreated water enters the ultrafiltration membrane module (hollow fiber type, pore size 0.01~0.1μm), intercepting ≥99% of turbidity, colloids, bacteria, algae and macromolecular organics; the ultrafiltration effluent (pure water side) has stable quality (turbidity ≤0.1NTU, SDI≤3), and 2 tons of qualified ultrafiltration water is produced per hour.
3. Water distribution buffer: The ultrafiltration effluent enters the buffer water tank, and the integrated water distribution valve group distributes 1m³/h of water to the RO system as inlet water, and the remaining 1m³/h is allocated to the UF backwashing system (for regular membrane flushing) and miscellaneous water supply port (for direct use); the buffer tank effectively stabilizes the water pressure and flow of RO inlet water, avoiding RO system failure caused by water flow fluctuation.
4. 1m³/h reverse osmosis desalination: The 1m³/h ultrafiltration water is pressurized to 1.0~2.5MPa by the high-pressure pump and enters the RO membrane module; the RO membrane (pore size 0.0001μm) intercepts ≥97% of dissolved salts, heavy metals, nitrate, trace organic matters and residual microorganisms, producing 1 ton of standard pure water per hour (conductivity ≤10μS/cm for tap water/groundwater, ≤20μS/cm for surface water); the RO concentrated water is discharged or partially recycled (improving water recovery rate).
5. Pure water storage: The RO pure water is stored in a sealed pure water tank, and the liquid level sensor is linked with the system control cabinet to realize automatic start/stop of the whole system (stop water production when the tank is full, start automatically when the water level is low).
6. Post-treatment (optional): According to the water use demand, configure UV sterilizer (kill residual microorganisms), pH adjustment device (adjust pH to 6.5~8.5, suitable for drinking water), and precision filter (0.22μm, terminal filtration) to further optimize the pure water quality and meet the higher standard water use requirements.

Main Component System (Modular Integrated Design)

1. Raw Water Intake & Pre-Pretreatment Unit (2m³/h matching)

• Raw water booster pump: 2.5m³/h flow, providing stable water pressure (0.2~0.3MPa) for the whole front-end system, with overload and dry running protection;
• 5μm PP melt-blown coarse filter: Removes large particle impurities, replaceable consumables, easy maintenance;
• 1μm precision cartridge filter: Further removes fine suspended solids, ensures UF inlet water quality, and the filter element is replaced every 3~6 months;
• Optional coagulant dosing device: For raw water with turbidity >50NTU, automatic dosing of food-grade coagulant to agglomerate fine colloids for easy UF interception.

2. Core Pretreatment – 2m³/h Ultrafiltration (UF) System

• UF membrane module: Hollow fiber ultrafiltration membrane (PVDF material, pollution-resistant), 2m³/h rated flux, 1~2 sets (customizable according to raw water quality), with high temperature and chemical resistance;
• UF backwashing system: Equipped with backwashing pump, clean water tank and automatic valve group, using the redundant 1m³/h UF effluent for regular backwashing (once every 1~3 hours, 1~2 minutes each time), removing membrane surface pollutants;
• UF concentrated water discharge valve: Automatically adjust the discharge flow, control the UF operation flux and concentration multiple, ensure stable effluent quality;
• Turbidity/SDI detector: Real-time monitoring of UF effluent quality, automatic alarm when the index is unqualified, and link with the water distribution valve group to cut off the RO inlet water.

3. Water Distribution & Buffer Unit (2:1 flux core)

• UF effluent buffer tank: 500~1000L volume, food-grade PE/stainless steel, stabilizes water pressure and flow, avoids RO system pressure fluctuation;
• Integrated water distribution valve group: PLC-controlled electric valve group, accurate distribution of 1m³/h water to RO system, 1m³/h to backwashing/miscellaneous water, with flow meter real-time display;
• Miscellaneous water supply port: External connection port for UF effluent direct use, with pressure reducing valve and water meter, convenient for on-site water use and metering.

4. Core Purification – 1m³/h Reverse Osmosis (RO) System

• High-pressure pump: 1.2m³/h flow, 1.0~2.5MPa adjustable pressure, special for RO, with pressure relief and overload protection;
• RO membrane module: Low-pressure composite RO membrane, 1m³/h rated pure water production, 1~2 elements (8040/4040 model), desalination rate ≥97%, suitable for medium and low salinity raw water;
• Automatic scale inhibitor dosing device: Food-grade/industrial scale inhibitor, automatic dosing according to RO inlet water flow, preventing calcium/magnesium ion scaling on RO membrane surface;
• RO concentrated water regulating valve: Adjust the RO water recovery rate (60~75% for this system), control the concentrated water discharge flow, and the optional energy recovery device can be added for energy saving.

5. Pure Water Storage & Delivery Unit (1m³/h matching)

• Sealed pure water tank: 1~5m³ volume (customizable), food-grade 304 stainless steel, anti-secondary pollution, with air filter and liquid level sensor;
• Pure water delivery pump: 1.2m³/h flow, providing stable water pressure (0.2~0.3MPa) for the water use point, with pressure maintaining function;
• Water quality monitoring instrument: Conductivity/TDS meter installed at the pure water tank outlet, real-time display of pure water quality, data can be exported and recorded.

6. Post-Treatment Unit (Optional, Customizable)

• UV sterilizer: 1m³/h matching, 254nm ultraviolet wavelength, kill ≥99.9% of residual microorganisms in pure water, no chemical residue;
• pH adjustment device: Automatic dosing of food-grade sodium hydroxide, adjust pure water pH from acidic (5~6) to neutral (6.5~8.5), suitable for drinking water and industrial process water with pH requirements;
• 0.22μm terminal precision filter: Terminal filtration of pure water, remove fine particles and microbial flocs, ensure the cleanliness of the final water output;
• TOC remover: Optional for high-standard water use (laboratory/electronic), remove trace organic matter in pure water, reduce TOC content to ≤50ppb.

7. Integrated Control & Monitoring Unit (Full Automatic)

• PLC control cabinet: The core of the whole system, with touch screen operation interface, real-time display of operating parameters (flow, pressure, turbidity, conductivity, liquid level);
• Sensors & transmitters: Turbidity sensor (UF), SDI detector (UF effluent), pressure sensor (inlet/outlet of UF/RO), flow meter (2m³/h UF, 1m³/h RO), conductivity meter (RO effluent);
• Automatic valve group: Solenoid valve, electric ball valve, check valve, all linked with PLC, realize automatic start/stop, backwashing, flushing and water distribution;
• Acousto-optic alarm & protection function: Automatic alarm for abnormal conditions (low raw water pressure, unqualified UF effluent, high RO pressure, unqualified pure water conductivity, high/low liquid level); automatic shutdown protection for serious faults to avoid equipment damage;
• Data recording & remote monitoring: Support real-time data recording and U disk export, the optional 4G/PLC module can realize remote monitoring and operation of the system (mobile phone/ computer).

Core Product Features

1. 2:1 scientific flux matching, stable system operation

   The ultrafiltration flux is twice that of reverse osmosis, which not only guarantees the sufficient and stable water supply of the RO system, but also uses redundant ultrafiltration water for membrane backwashing, fundamentally solving the problems of RO membrane pollution and system pressure fluctuation caused by unstable raw water quality, and the continuous water production rate of the system is ≥99%.

2. Dual-stage deep purification, high and stable water quality

   Ultrafiltration as deep pretreatment removes most macromolecular impurities, and reverse osmosis as core desalination removes dissolved salts and trace pollutants; the produced water quality is stable (conductivity ≤10μS/cm, turbidity ≤0.1NTU, bacteria ≤0CFU/mL), which can meet the national standards of industrial pure water (GB/T 19249-2018) and drinking pure water (GB 17323-1998) (after post-treatment).

3. Full automatic operation, no manual duty

   The whole system is controlled by PLC with touch screen, realizing automatic start/stop (linked with pure water tank liquid level), automatic backwashing of ultrafiltration membrane, automatic flushing of RO membrane, automatic dosing and automatic alarm; no on-site manual operation is required, saving labor costs, and the operation threshold is low (ordinary staff can operate after simple training).

4. Classified water reuse, high water utilization rate

   The system realizes classification output of water quality: 1m³/h RO pure water for high-standard use (industrial process, drinking), 1m³/h UF water for low-standard miscellaneous use (greening irrigation, road flushing, toilet flushing); the overall water utilization rate of the system is ≥60% (higher than the traditional single RO system of 50%), saving water resources and reducing sewage discharge.

5. Modular skid-mounted design, easy installation and maintenance

   All components are integrated on a stainless steel skid-mounted frame, with standardized pipelines and quick-connect joints; the on-site installation only needs to connect the raw water pipe, pure water pipe and power supply (380V/220V), which can be put into use in 1~2 days; the modular design makes the replacement of consumables (filter element, membrane) simple and fast, with low maintenance difficulty.

6. Strong raw water adaptability, wide application

   Suitable for various raw water types: surface water (river/lake water, turbidity ≤200NTU), groundwater (high turbidity/high hardness), pretreated urban reclaimed water and tap water with unstable quality; the system can be adjusted by simple parameter setting (dosing flow, backwashing frequency) to adapt to different raw water quality, with strong anti-interference ability.

7. Membrane protection design, long service life of core components

   Ultrafiltration membrane is equipped with automatic regular backwashing and chemical cleaning port (for severe pollution); RO membrane is equipped with automatic flushing (start/stop flushing), scale inhibitor automatic dosing and low-pressure operation design; the service life of ultrafiltration membrane is 3~5 years, and the service life of RO membrane is 2~4 years, which is longer than the traditional non-matched system, reducing the replacement cost of consumables.

8. Complete protection functions, high equipment safety

   The system is equipped with multiple protection functions: raw water pump dry running protection, high-pressure pump overload protection, UF/RO high/low pressure protection, unqualified water quality interception protection, liquid level over-limit protection; it can automatically alarm and shut down for faults, avoiding equipment damage caused by misoperation or abnormal raw water quality, and the equipment operation safety factor is high.

Typical Application Scenarios

1. Small and medium-sized industrial production: Pure water supply for small workshops (cosmetics, food processing, precision electroplating, plastic molding), used as process water, cleaning water and cooling water; UF miscellaneous water for workshop flushing and greening irrigation.
2. Commercial centralized water supply: Pure water production for hotels, hospitals, schools, office buildings and commercial plazas, used for drinking, catering and cleaning; UF miscellaneous water for garden greening, road flushing and toilet flushing.
3. Rural centralized drinking water: Purification and desalination of rural surface water/groundwater (high turbidity/high hardness/bitter and salty water), solving the problem of unsafe drinking water for villages and towns; RO pure water for drinking, UF water for domestic miscellaneous use.
4. Municipal reclaimed water reuse: Deep purification of urban domestic reclaimed water (after secondary treatment), realizing water resource recycling; RO pure water for municipal greening and landscape water replenishment, UF water for road flushing and sewage plant self-use water.
5. Field mobile water supply: Customized skid-mounted mobile version (with trailer), suitable for construction sites, mining areas, field operation bases and disaster relief sites; it can realize on-site water production with raw water such as river water and well water, meeting the dual demand for drinking water and miscellaneous water.
6. Aquaculture water purification: Purification of aquaculture raw water (pond water/river water), RO pure water for seedling breeding and high-end aquaculture, UF water for ordinary aquaculture water change and pond flushing, improving the survival rate of aquaculture.

Key Technical Parameters (Standard Configuration)

Daily Operation & Maintenance (Low Cost, Simple Operation)

1. Consumables replacement: Replace 5μm PP coarse filter element every 1~3 months; replace 1μm precision filter element every 3~6 months; replace coagulant/scale inhibitor in time (according to consumption).
2. UF membrane maintenance: The system automatically backflushes the UF membrane regularly; for raw water with high turbidity, chemical cleaning (citric acid/sodium hypochlorite) is performed every 6~12 months to restore membrane flux; the UF membrane is replaced every 3~5 years.
3. RO membrane maintenance: The system automatically flushes the RO membrane when starting/shutting down; check the scale inhibitor dosing flow regularly to ensure accurate dosing (avoid scaling); chemical cleaning (citric acid/sodium hydroxide) is performed every 12~24 months; the RO membrane is replaced every 2~4 years.
4. Tank & pipeline cleaning: Clean the raw water buffer tank, UF effluent buffer tank and pure water tank every 6~12 months, and disinfect with food-grade disinfectant (chlorine dioxide/ozone) to prevent secondary pollution; flush the pipeline regularly to remove sediment and impurities.
5. Instrument calibration: Calibrate turbidity meter, conductivity meter, flow meter and pressure gauge every year to ensure the accuracy of monitoring data and the normal operation of the automatic control system.
6. Regular inspection: Check the sealing performance of valves and pipelines every month to prevent water leakage; check the operation status of pumps and fans, and add lubricating oil regularly; clean the dust of the control cabinet to ensure good heat dissipation.

Customization Options

1. Raw water quality customization: Add coagulant dosing device for high-turbidity raw water; add softener for high-hardness raw water; add activated carbon filter for raw water with high residual chlorine/odor.
2. Water quality customization: Add TOC remover/EDI ultra-pure water module for high-standard pure water demand (conductivity ≤0.1μS/cm, laboratory/electronic); add mineralization device for drinking water demand (add trace minerals).
3. On-site customization: Customize the skid-mounted size for narrow installation space; add rainproof/sunshade/anti-freezing design for outdoor installation; customize mobile trailer for field water supply.
4. Function customization: Add remote monitoring (4G/WiFi) and data cloud storage; add automatic chemical cleaning system for unattended scenarios; add water metering and charging system for commercial water supply.