Water Treatment Filter Belt Softening Fully Automatic Reverse Osmosis Precision Filtration System

Product description

Technical analysis of fully automatic reverse osmosis precision filtration system with softened water treatment filter belt
1、 System core architecture and process flow
This system integrates two core technologies: filter belt softening pretreatment and reverse osmosis precision filtration. Through a multi-stage purification process, it deeply removes hardness, salt, and impurities from water, making it suitable for scenarios such as high hardness groundwater and industrial wastewater reuse. The core process is as follows:
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Raw water → Mechanical filtration (grid/sand settling) → Filter belt softening device → Precision filtration (sand filter+carbon filter) → Security filtration → Fully automatic reverse osmosis system → Water production
2、 Key Unit Technical Principles and Parameters
1. Filter belt softening device (core innovation point)
working principle:
Using ion exchange resin filter strips (such as sodium type strong acidic cation exchange resin), calcium and magnesium ions (Ca ² ⁺/Mg ² ⁺) are removed through ion exchange reaction, reducing water hardness from 500mg/L (calculated as CaCO 3) to ≤ 5mg/L.
Continuous softening and regeneration: The filter belt moves continuously through the softening zone and regeneration zone. The softening zone completes ion exchange, and the regeneration zone uses 8% -10% NaCl solution to restore resin activity, achieving uninterrupted softening.
Technical advantages:
Occupying only one-third of the space of traditional softening tanks, with a processing capacity of 50-200m ³/h;
Regenerated salt consumption is reduced by 20%, water consumption is reduced by 30%, and operating costs are 15% -20% lower than traditional softening equipment.
2. Preprocessing system
Mechanical filtration:
Automatic backwash disc filter (filtration accuracy 100-200 μ m), removes large particles of sediment, backwash water consumption<1%;
The laminated filter (with a filtration accuracy of 20-55 μ m) serves as a secondary protection to prevent soft impurities from entering the subsequent system.
Precision filtration:
Sand filter: Quartz sand (0.5-1.2mm) is used to remove turbidity, and the effluent SDI is ≤ 5;
Activated carbon filter: Coconut shell charcoal adsorbs residual chlorine (<0.05mg/L) and organic matter to prevent RO membrane oxidation.
3. Fully automatic reverse osmosis system
Membrane component configuration:
Adopting anti pollution bitter and salty water RO membrane (such as Dow BW30FR-400), desalination rate ≥ 99.5%, residual chlorine resistance ≤ 0.1mg/L;
Two stage design (6:3 arrangement), with a recovery rate of 75% -80%, and a water conductivity of ≤ 20 μ S/cm (when the TDS of the raw water is less than 2000mg/L).
Intelligent control:
PLC+touch screen fully automatic control, equipped with:
Low pressure protection (automatic shutdown when the inlet pressure is less than 0.5MPa);
High pressure protection (automatic pressure relief for water production pressure>1.6MPa);
Water quality monitoring (online conductivity meter, automatic discharge for exceeding standards);
Automatic cleaning (chemical cleaning triggered by pressure difference>0.15MPa, citric acid+sodium hydroxide solution).

3、 System performance and water quality treatment effect
RO produced water after softening the filter belt of raw water (typical groundwater) during the treatment stage
Turbidity (NTU) ≤ 20 ≤ 1 ≤ 0.1
Hardness (CaCO3, mg/L) ≤ 500 ≤ 5 ≤ 1
Conductivity (μ S/cm) ≤ 2000 ≤ 1800 ≤ 20
Silicon dioxide (mg/L) ≤ 50 ≤ 50 ≤ 0.1
Microorganisms (CFU/mL) ≤ 1000 ≤ 100 ≤ 1
4、 Technological advantages and innovative design
Anti pollution and long lifespan
Softening of the filter belt can remove over 95% of the hardness, and the scaling cycle of the RO membrane can be extended to 18-24 months (compared to 6-12 months in traditional systems);
The RO membrane adopts a cross flow filtration design, with a concentrated water flow rate greater than 3m/s, to reduce the deposition of pollutants on the membrane surface.
Energy conservation and resource recycling
The high-pressure pump is equipped with a variable frequency controller, which automatically adjusts according to the inlet pressure and consumes 1.8-2.2 kWh/m ³ of energy;
Concentrated water recovery system: When the TDS of concentrated water is less than 3000mg/L, it can be reused for plant greening or cooling tower replenishment, with a water resource utilization rate of 90%.
Modularization and intelligent operation and maintenance
Standard container design (20 foot container can integrate 50m ³/h system), on-site installation to be completed within 7 days;
Remote monitoring system: Real time transmission of operational data (pressure, flow, water quality) through 4G/5G networks, with a fault warning response time of less than 1 hour.
5、 Application scenarios
Industrial water treatment
Power industry: Boiler feedwater (hardness ≤ 0.03mmol/L) to prevent turbine scaling;
Electronics industry: Secondary RO produced water (conductivity ≤ 5 μ S/cm) is used as pre-treatment for ultrapure water systems;
Chemical wastewater reuse: Treat the wastewater from circulating cooling water and reuse it after reducing TDS from 5000mg/L to ≤ 200mg/L.
Municipal and Rural Water Supply
Drinking water in high hardness areas: such as groundwater in North China, the treated water quality meets GB 5749-2022;
Rural centralized water supply station: 50-200m ³/h modular system, fully automatic operation, reducing manual maintenance.
Special fields
Pharmaceutical industry: Pre treated water meets GMP requirements for purified water (conductivity ≤ 2 μ S)/ cm@25 ℃）；
Pre treatment of Island Desalination: As a pre-treatment for seawater reverse osmosis systems, it removes turbidity and organic matter, extending the lifespan of RO membranes.

6、 Typical case: Water reuse project in a chemical industrial park
Raw water: Circulating cooling water wastewater (TDS 3500mg/L, hardness 1200mg/L);
System configuration:
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Raw water → belt softening (80m ³/h) → sand filtration+carbon filtration → security filtration (5 μ m) → two-stage RO → reuse water tank

Running effect:
TDS ≤ 100mg/L, hardness ＜ 1mg/L, meeting the requirements for replenishing circulating cooling water;
The system recovery rate is 85%, saving 260000 tons of fresh water annually and approximately 1.3 million yuan in water bills;
Fully automatic operation, requiring only 1 person/week for inspection, reducing operation and maintenance costs by 40%.
7、 Technological development trends
Intelligent upgrade:
AI algorithm predicts membrane fouling trends and automatically adjusts operating parameters (such as recovery rate and cleaning frequency);
Blockchain technology enables water quality data traceability, meeting the compliance needs of the food and pharmaceutical industries.
Application of new materials:
Replacing some RO systems with pollution resistant nanofiltration membranes (NF) for treating moderate salinity water sources (TDS 500-2000mg/L), reducing energy consumption by 30%;
Biodegradable ion exchange resin filter belt reduces secondary pollution.
Coupling process innovation:
The combination of filter belt softening and electrode ionization (EDI) achieves chemical free softening and deep desalination;
Coupling reverse osmosis with membrane distillation (MD) for the treatment of high salt wastewater (TDS>50000mg/L).
This system demonstrates significant advantages in high hardness water source treatment, reclaimed water reuse, and other fields through the synergistic effect of filter softening and reverse osmosis. In the future, it will continue to develop towards more efficient, intelligent, and green directions.