(I)Product Overview
The second stage reverse osmosis (second stage RO) pure water equipment is a pure water preparation device that uses the first stage reverse osmosis produced water as the inlet, and then undergoes deep desalination by the second stage reverse osmosis. Based on the high-pressure screening principle of the reverse osmosis membrane, two stages are connected in series to remove impurities such as salt, colloids, suspended solids, microorganisms, heavy metals, residual chlorine, and organic matter in the water step by step. The single-stage RO desalination rate is about 97%, and the two-stage comprehensive desalination rate can reach over 99%. The effluent conductivity is stable below 5 μ S/cm, and it is often used as a pretreatment for EDI ultrapure water equipment. It is widely used in industries such as lithium batteries, photovoltaics, electronics, pharmaceuticals, laboratories, cosmetics, food and beverage, and is the mainstream pretreatment process for producing high-purity pure water. The incoming water is mostly tap water/groundwater, and the entire equipment can operate continuously and automatically, suitable for large-scale industrial pure water production.
(II) Equipment features
1. Excellent desalination ability, stable and reliable water quality, using a two-stage series filtration process to deeply remove soluble salts, silicon, heavy metals and other substances from the water. The antigen water has strong fluctuation ability, and the stable water quality indicators meet the requirements of the EDI device inlet water quality.
2. Fully automated control, easy operation and maintenance, equipped with PLC intelligent self-control system, realizing automatic start stop of equipment, automatic flushing of membrane components, high and low pressure safety protection, real-time online water quality monitoring, and supporting 24-hour unmanned continuous operation.
3. Water saving and energy-saving, with lower overall operating costs. One level concentrated water can be recycled and reused; Equipped with a variable frequency high-pressure pump, the working pressure is automatically adjusted according to the working conditions to reduce energy consumption; The system automatically flushes the reverse osmosis membrane at regular intervals, effectively extending the service life of membrane components and reducing consumables replacement expenses.
4. Clean and anti-corrosion materials are used to avoid the risk of secondary pollution. The water related components of the system are made of corrosion-resistant materials such as 304 stainless steel, UPVC, PVDF, etc., to prevent rust precipitation; The supporting pretreatment unit removes residual chlorine to avoid oxidative damage to the reverse osmosis membrane.
5. Protect the backend EDI system, reduce the burden of operation and maintenance. The SDI, turbidity, and ion content of the secondary produced water are all at extremely low levels, effectively reducing the desalination load of the EDI membrane stack, reducing the probability of scaling and pollution, and extending the overall service life of the EDI membrane stack.
6. Modular architecture, flexible and convenient capacity expansion. The membrane shell and membrane components adopt standardized configuration. If the water production scale needs to be increased in the later stage, membrane components can be directly added without the need for replacement or renovation of the entire equipment.
7. Multiple safety interlock protection, low equipment failure rate, integrated water shortage and low pressure protection, high pressure overload protection, water quality exceeding reflux, liquid level interlock and other multiple protection mechanisms to prevent faults such as dry running of high pressure pumps and high pressure damage to membrane components.
(III)Complete system composition
1. High precision desalination, two-stage series deep purification of anti fluctuation effluent, efficient removal of salt, silicon, and heavy metal impurities. Even if the raw water conditions change, the produced water remains stable and meets the standards, perfectly matching the EDI inlet conditions.
2. Intelligent fully automatic, with less human operation, equipped with PLC control system, automatic start stop, automatic membrane flushing, online water quality monitoring, multiple electrical protections, the equipment can produce pure water 24/7 unattended.
3. Energy saving and environmental protection, saving long-term expenses. First level concentrated water recycling and reuse, variable frequency pump energy-saving and consumption reducing; Automatic flushing of protective film components prolongs the service life of the film and reduces consumables and electricity costs.
4. Food grade anti-corrosion material, with no secondary pollution in water quality. The water involved parts are made of 304 stainless steel, UPVC, PVDF materials, and have no corrosion or leaching; Pre process eliminates residual chlorine and protects the RO membrane from oxidation damage.
5. Pre protection EDI reduces the SDI, turbidity, and ion impurities of the secondary RO effluent during later maintenance, greatly alleviating the working pressure of the EDI membrane stack, reducing scaling pollution, and extending the service life of EDI.
6. Modular scalability, simple capacity upgrade, standardized design of membrane components, and later business expansion. Simply stacking membrane components can increase water production without the need to replace the entire equipment.
7. Comprehensive safety protection, more secure operation with water shortage, high pressure overload, abnormal water quality reflux, liquid level linkage protection, avoiding pump dry burning, membrane pressure damage, and reducing downtime due to faults
(I) Product Overview
This equipment adopts a dual-stage reverse osmosis (RO) + EDI (electrodeionization) core process and is a super-pure water preparation device specially developed for high-end industries such as lithium batteries and precision electronics. The equipment can stably produce high-purity super-pure water with a resistivity of ≥18MΩ·cm, featuring high purity and strong stability, fully meeting the water demand for high-precision production processes such as electrolyte preparation and electrode coating. Equipped with a fully automatic intelligent control system, the equipment operates automatically throughout the entire process, combining the advantages of energy saving, water saving, and low maintenance costs. It supports customized capacity and process solutions according to demand and adapts to different raw water quality conditions.
(II) Core Features of the Product
1. Ultra-high desalination, ensuring consistent and up-to-standard water quality. Equipped with imported high-quality reverse osmosis membranes from Dow and Hydranautics, coupled with high-precision EDI modules, the system achieves a comprehensive ion removal rate of over 99.99%. It can stably produce 18MΩ·cm ultrapure water for a long time, eliminating water quality fluctuations and meeting the stringent water standards required for high-end industrial production.
2. Intelligent and fully automatic, energy-saving and cost-reducing. Utilizing a PLC intelligent control system, it supports real-time water quality monitoring, automatic flushing, fault warning, and parameter adaptive adjustment, eliminating the need for dedicated personnel. Coupled with variable frequency energy-saving and energy recovery technology, it achieves a 25%-30% energy saving compared to traditional equipment, with a water recovery rate of up to 70%, significantly reducing long-term operating costs.
3. Modular design, flexible adaptation. The entire machine adopts a standardized integrated modular structure, allowing pre-treatment, RO, and EDI units to be freely combined according to production capacity. The equipment occupies less space and is easy to install. It can customize exclusive water purification solutions for complex raw water with high hardness and high organic matter, adapting to various industrial production scenarios.
4. Durable, low-consumption, and environmentally friendly. The core pipeline is made of 316L stainless steel and high-quality UPVC environmental protection and anti-corrosion materials, ensuring a service life of over 10 years for the entire machine. The EDI system eliminates the need for acid-base chemical regeneration, resulting in zero acid-base wastewater discharge. Coupled with automatic cleaning of membrane components and consumable warning functions, it effectively extends the service life of accessories and reduces maintenance frequency.
(III) System composition and core functions
1. The pretreatment system consists of multi-media filtration, activated carbon filtration, softener, and precision filter. It removes sediment, colloids, organic matter, and residual chlorine step by step, reduces water hardness, intercepts fine impurities, stabilizes the inlet water quality to meet standards, and protects the core components of the reverse osmosis membrane at the back end.
2. The dual-stage reverse osmosis (RO) system utilizes imported high-pressure RO membrane elements. Through high-pressure permeation technology, it intercepts the vast majority of salt, impurities, and microorganisms in water, producing low-conductivity primary pure water. This completes the initial deep purification of water quality and provides qualified inlet water for EDI fine treatment.
3. EDI (Electrodeionization) system, as the core fine treatment unit, utilizes electric field and ion exchange technology to deeply remove trace residual ions from water. Without the need for chemical regeneration, it stably produces ultra-high purity water with a conductivity of 18MΩ·cm, making it the core module for the preparation of industrial ultra-pure water.
4. Terminal sterilization and filtration system: Equipped with a dual-wavelength ultraviolet sterilizer and a terminal precision filter, it effectively kills bacteria, degrades organic impurities, and intercepts tiny particulate matter, preventing secondary water pollution and ensuring sterile and highly purified effluent.
5. Intelligent automatic control system: With industrial PLC + touch screen as the core, it monitors flow rate, pressure, and water quality parameters in real time, and features automatic flushing, water shortage/high pressure protection, fault alarm, data storage, and other functions, enabling 24-hour unattended stable operation of the equipment.
