Fully Automatic Sand Filter Carbon Filter Softener Precision Filter Reverse Osmosis Sterile Water tank Treatment Equipment

Product description

This equipment is an integrated fully automatic pure water preparation system that uses a full process technology of “pretreatment → softening → deep purification → sterile storage” to treat raw water such as tap water and groundwater into high-purity sterile water that meets industry standards such as food, medicine, and electronics. It has the characteristics of fully automatic operation, stable water production, and low maintenance costs. 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. Fully Automatic Sand Filter
Construction: 304 stainless steel tank body, equipped with gradient quartz sand filter material (upper layer 1-2mm coarse sand, lower layer 0.5-1mm fine sand), equipped with PLC controlled fully automatic backwash valve group (pneumatic or electric), pressure sensor and time controller.
Core functions:
Physical interception: Removing suspended impurities such as sediment, rust, algae, colloids, etc. from raw water, reducing turbidity from 10-30NTU to ≤ 1NTU;
Automatic backwashing: When the inlet and outlet water pressure difference is greater than 0.05MPa or timed (8-12 hours), the system automatically starts backwashing (water flushing+air flushing optional), and removes surface pollutants from the filter material through reverse water flow without manual operation;
Protect subsequent equipment: prevent large particle impurities from scratching activated carbon, softening resin or reverse osmosis membrane, and extend the life of core components.
2. Fully Automatic Carbon Filter
Construction: Same material tank body, filled with high iodine value coconut shell particle activated carbon (iodine adsorption value ≥ 1000mg/g), linked control with sand filter, equipped with the same automatic backwash system.
Core functions:
Adsorption purification: Efficiently adsorbs residual chlorine (removal rate>99%), organic matter (such as pesticides, humic acid), odors, and pigments in water, avoiding residual chlorine oxidation and damage to the reverse osmosis membrane;
Automatic regeneration: restore the adsorption capacity of activated carbon through backwashing (filter media needs to be replaced after adsorption saturation, with a cycle of 6-12 months);
Improving water quality stability: reducing COD (chemical oxygen demand) and minimizing the risk of organic pollution in reverse osmosis membranes.
3. Fully Automatic Softener
Construction: Stainless steel tank body, filled with sodium cation exchange resin (such as 001 × 7), equipped with salt tank (storing 8-10% NaCl solution), flow meter, and fully automatic regeneration control valve (linked by PLC).
Core functions:
Deep de hardening: removing calcium (Ca ² ⁺) and magnesium (Mg ² ⁺) ions through ion exchange, reducing water hardness from 300-500mg/L (calculated as CaCO ∝) to ≤ 5mg/L;
Automatic regeneration: When the treated water reaches the resin exchange capacity (or timed for 7-10 days), the system automatically completes the “backwash → salt absorption → displacement → forward washing” regeneration process to restore resin activity;
Anti scaling protection: prevents hardness ions from scaling on the surface of the reverse osmosis membrane and extends the membrane cleaning cycle to 12-18 months.

4. Precision Filter
Construction: 304 stainless steel shell, built-in 5 μ m PP folding filter element (3-5 pieces, configured according to flow rate), equipped with pressure difference alarm device (prompts replacement when filter element is blocked).
Core functions:
Retain fine particles (such as resin fragments and activated carbon powder) remaining after pre-treatment, ensuring that the SDI (Pollution Index) entering the reverse osmosis membrane is ≤ 5;
As the ‘last line of defense’ of the reverse osmosis system, it absolutely protects the membrane components from damage.
5. Reverse Osmosis System
Core components:
High pressure pump (made of 316L stainless steel material, providing 1.0-1.5MPa pressure, with variable frequency control for 30% energy saving);
Reverse osmosis membrane module (roll type composite membrane, such as Dow BW30-400, desalination rate ≥ 99.5%);
Fully automatic valve group (regulating the proportion of concentrated water discharge, with a recovery rate of 60% -75%);
Online monitoring instruments (conductivity meter, pressure transmitter, flow meter).
Core functions:
Deep desalination: intercepting more than 99% of soluble salts, heavy metals, bacteria, and large organic molecules, with a water conductivity of ≤ 50 μ S/cm;
Automatic operation: automatically flushes the membrane surface upon startup, starts and stops based on the sterile water tank level, triggers the cleaning program when the membrane is contaminated, and automatically alarms for faults.
6. Sterile Water Tank
Construction: Made of 316L stainless steel material (mirror polished inner wall, Ra ≤ 0.8 μ m), with a capacity of 1-2 hours of water production for the system, equipped with:
0.22 μ m sterilization grade respiratory filter (to prevent microbial contamination in the air);
Sanitary grade mixer (to prevent water quality stratification);
Liquid level sensor (linked reverse osmosis system start stop);
Online temperature sensor (in conjunction with pasteurization).
Core functions:
Aseptic storage of reverse osmosis water to avoid secondary contamination (microbial concentration ≤ 10CFU/mL);
Support regular pasteurization (80-85 ℃ cycle for 30 minutes), in compliance with GMP hygiene requirements;
Stabilize water supply pressure and balance fluctuations in terminal water usage.
7. Fully automatic control system
Core components: 10-15 inch touch screen PLC control cabinet, integrating various unit sensors and actuators.
Function:
Real time display of pressure, flow rate, conductivity, liquid level and other parameters, supporting historical data query;
Automatic linkage of sand filter backwash, softener regeneration, reverse osmosis flushing and other processes;
Fault alarm (such as water shortage, membrane fouling, excessive discharge) and automatic shutdown protection;
Support remote monitoring (optional IoT module) to achieve unmanned operation.
2、 System workflow
Preprocessing stage:
The raw water enters the fully automatic sand filter to remove suspended impurities, and then enters the carbon filter to adsorb residual chlorine and organic matter. The turbidity of the pre treated water is ≤ 1NTU, and the residual chlorine is ≤ 0.05mg/L.
Softening stage:
Pre treated water enters the fully automatic softener to remove calcium and magnesium ions and reduce hardness. At the same time, the system automatically completes resin regeneration based on water consumption to ensure stable hardness of the effluent.

Precision filtration stage:
Softened water is filtered through a 5 μ m precision filter to trap fine particles and provide qualified inlet water (SDI ≤ 5) for the reverse osmosis membrane.
Reverse osmosis desalination stage:
After being pressurized by the high-pressure pump, water passes through the reverse osmosis membrane module, pure water enters the sterile water tank, and concentrated water is discharged; The system monitors the quality of the produced water in real time to ensure that the conductivity is ≤ 50 μ S/cm.
Aseptic storage and water supply stage:
Pure water is stored in a sterile water tank and kept sterile and uniform through a breathing filter and stirrer; When using water at the terminal, the water tank level is linked to the reverse osmosis system to start and stop, ensuring continuous water supply.
3、 Core advantages and application scenarios
Core advantages
Full process automation: No manual intervention is required from pre-processing to storage, reducing operation and maintenance costs, suitable for large-scale centralized water supply;
Stable and reliable water quality: multi-stage purification+sterile storage, the produced water meets both “low salt content” (conductivity ≤ 50 μ S/cm) and “sterility” (microorganisms ≤ 10CFU/mL), meeting multiple industry standards;
Long life design: Pre treatment provides sufficient protection for the reverse osmosis membrane, extending its lifespan to 3-5 years. The filter material and filter element replacement cycle are clear, and maintenance is highly predictable;
Strong compliance: The material and structure of the sterile water tank meet the requirements of food grade and pharmaceutical grade, and can pass certifications such as GMP and FDA.
Typical application scenarios
Food and beverage industry: bottled water production, juice blending, dairy product processing (requiring low hardness, no odor, and sterility);
Pharmaceutical industry: Purified water for formulation workshops and cleaning water for medical devices (in accordance with pharmacopoeia standards);
Electronics industry: electronic component cleaning, semiconductor lithography (requiring low ion content to avoid short circuits);
High end commercial venues: direct drinking water systems in five-star hotels and hospitals (with excellent taste, safe and sterile).
summarize
This device achieves one-stop treatment from raw water to high-purity sterile water through a closed-loop design of “fully automatic pretreatment+deep desalination+sterile storage”. Its core value lies in stable water production, full process controllability, and meeting strict water quality requirements. Its automation characteristics and wide applicability make it an ideal solution for high-quality water use in industries such as food, medicine, and electronics.