Primary Reverse Osmosis Fully Automatic Belt Water Tank Precise Filtration Water Treatment Equipment

Product description

1、 Core components and functions
1. Primary Reverse Osmosis (RO)
working principle:
By utilizing the selective permeability of a semi permeable membrane, water molecules in the raw water are allowed to pass through the membrane under the drive of a high-pressure pump (0.8-1.5MPa), while impurities such as dissolved salts (such as NaCl), bacteria, viruses, and organic matter are intercepted, achieving preliminary desalination.
The single-stage desalination rate is usually 95% -98%, and the conductivity of the produced water can be reduced to 5-50 μ S/cm (depending on the quality of the raw water).
Key components:
Reverse osmosis membrane element: commonly used roll type composite membrane (such as Dow BW30, Heiden ESPA), membrane area 37-40m ²/tube, desalination rate ≥ 99% (under standard conditions).
High pressure pump: Explosion proof centrifugal pump, power configured according to water production volume (e.g. power of about 7.5kW when producing 5m ³/h of water).
2. Fully Automatic System
Control logic:
Adopting PLC programmable controller and human-machine interface (HMI), real-time monitoring of parameters such as pressure, flow rate, conductivity, water tank level, etc.
Automated execution process:
plaintext
Raw water pretreatment → RO water production → water tank storage → full water shutdown → low liquid level startup → regular membrane flushing → fault alarm

Intelligent functions:
Automatic flushing: Automatically flush the film surface before/after startup to prevent pollutant deposition (flushing time 1-3 minutes).
Anti concentrated water back pressure: The concentrated water valve automatically adjusts to prevent damage to the membrane components under pressure.
3. Belt Water Tank
Water tank function:
Buffer storage: stores RO produced water, with a capacity designed according to water demand (such as a water tank capacity of 20-50m ³ when producing 10m ³/h), to meet continuous water use scenarios.
Liquid level control: By using ultrasonic level gauges or float valves, the RO system can be linked to start and stop (such as starting water production when the water tank level is below 20% and stopping when it is above 80%).
Material and Design:
Made of 304 stainless steel or PE material, with smooth and corrosion-resistant inner walls, equipped with air respirators and drain valves to prevent secondary pollution.

4. Precise Filtration
Pre processed precision filter:
Also known as a security filter, it is installed in front of the RO membrane with a filtration accuracy of 5 μ m. It intercepts small particles and colloids (such as iron manganese oxides) remaining after sand filtration/carbon filtration, protecting the membrane components from physical damage.
Filter type: PP melt blown filter, replacement cycle 1-3 months (replace when pressure difference>0.1MPa).
Post processing precision filtration (optional):
Install a 1 μ m filter element at the water production end to further remove small particles that may remain in RO water, suitable for scenarios with high water quality requirements (such as food processing).
2、 System Process and Characteristics
1. Complete processing flow
plaintext
Raw water → Pre treatment (sand filter+carbon filter+softening optional) → Precision filter (5 μ m) → Primary reverse osmosis → Produced water tank → Water point
2. Core Features
Advantage Details Explanation
High degree of automation, no need for manual supervision, automatic fault alarm (such as high-pressure pump overload shutdown), can be connected to remote monitoring system (such as Modbus protocol).
The water quality is stable with a constant desalination rate, and the produced water meets the industrial water quality standards (such as GB/T 19923-2005 “Industrial Water Quality”).
High cost-effectiveness compared to two-stage RO, with a cost reduction of 30% -50%, suitable for moderate desalination needs (such as conductivity<100 μ S/cm).
Small footprint integrated design, integrated installation of pre-treatment and RO host, occupying only 5-10 square meters (with a water production capacity of 5m ³/h).
3、 Application scenarios
1. Industrial production field
Boiler water replenishment: Reduce calcium and magnesium ions in water (hardness ≤ 0.03mmol/L) to prevent boiler scaling (such as in power plants and textile factories).
Circulating cooling water: removes suspended solids and salt, reduces heat exchanger corrosion (such as in steel plants and chemical plants).
Food and beverage processing: Prepare cleaning water or ingredient water (in accordance with GB 5749 “Sanitary Standards for Drinking Water”).
2. Civil and commercial fields
Direct drinking water system in the community: The conductivity of the produced water is ≤ 50 μ S/cm, and it can be consumed directly (with a UV sterilizer).
Laboratory water: used as a basic equipment for pure water (later compatible with EDI or ultrapure water machines).
Primary treatment of seawater desalination: combined with distillation method to reduce the pretreatment cost of high salt seawater.
3. Special Scenarios
High turbidity raw water treatment: If the iron and manganese content in groundwater is high, a manganese sand filtration pretreatment step can be added.
High residual chlorine raw water treatment: By using an activated carbon filter and adding reducing agents (such as sodium bisulfite), the safety of the RO membrane is ensured.

4、 Maintenance and operation parameters
1. Key points of daily maintenance
Pre treatment: Regularly backwash the sand filter/carbon filter (when the pressure difference is greater than 0.05MPa), and replace the activated carbon (once a year).
RO system:
Monthly detection of membrane element pressure drop, chemical cleaning is carried out when it exceeds 0.3MPa (acidic cleaning: 2% citric acid; alkaline organic matter removal: 1% NaOH+0.02% SDS).
Check the oil level of the high-pressure pump bearings every quarter to ensure good lubrication.
Water tank: Drain and clean it every six months to remove sediment at the bottom.
2. Key operating parameters
The impact of exceeding the recommended scope of the project
The risk of membrane fouling increases significantly when the turbidity of raw water is ≤ 5NTU and>10NTU
Raw water residual chlorine ≤ 0.1mg/L residual chlorine ＞ 0.5mg/L will result in oxide film material
When the inlet SDI (pollution index) is ≤ 5 and SDI>5, the membrane blockage rate accelerates
The recovery rate of water production is 60% -80%, and a recovery rate greater than 85% may lead to scaling
When the operating water temperature is 15-35 ℃ and the water temperature is less than 10 ℃, the water production decreases by 30%
5、 Selection suggestions
1. Select based on water production rate
Small scale system: produces 1-5m ³/h of water, suitable for laboratories and small factories.
Medium sized system: produces 10-50m ³/h of water, suitable for residential areas and food factories.
Large scale system: water production>100m ³/h, customized design is required (such as multiple sets of membranes in parallel).
2. Pre treatment is configured according to the quality of raw water
Groundwater: Priority should be given to using manganese sand filters (excluding iron and manganese) and softeners (excluding hardness).
Tap water: can be simplified as sand filtration+carbon filtration+precision filtration.
Surface water: sedimentation tank+coagulation and chemical pretreatment (such as PAC/PAM) need to be added.
3. Special configurations for explosion-proof scenarios
If used in flammable and explosive environments (such as chemical plants), explosion-proof high-pressure pumps, solenoid valves, PLC control cabinets (explosion-proof level Ex d IIC T6) should be selected and certified by ATEX/IECEx.
summarize
The device achieves efficient removal of impurities in water through an integrated design of “pretreatment+first level RO+water tank+fully automatic control”, combining automation, stability, and economy. Suitable for scenarios with moderate desalination requirements for water quality, it is one of the mainstream choices in the industrial and civilian water purification fields. Through reasonable maintenance, the system can ensure long-term stable operation and meet diverse water quality requirements.