Everything you need to know about ultrapure water treatment systems

An ultrapure water system is a device that produces ultrapure water through multiple filtration, ion exchange, degassing, reverse osmosis, ultraviolet, ultrafiltration, nano-rate, and ion adsorption filtration. Ultra-pure water systems use reverse osmosis (membrane separation) method of ultra-pure water manufacturing technology. Reverse osmosis is the use of enough pressure to make the solvent in the solution (often referred to as water) through the reverse osmosis membrane (a semi-permeable membrane) and separated, in the opposite direction from the direction of osmosis, can be used greater than the osmolarity of the reverse osmosis method to separate, purify and concentrate the solution. Reverse osmosis membranes are primarily used to separate the ionic range of solutions.

01.

Introduction To EDI Ultrapure Water Treatment System

The edi ultrapure water system is a complete ultrapure water preparation system that uses electrically deionized filtration devices plus other components. Ultra-pure water was originally produced by applying distillation, deionization, reverse osmosis, or other appropriate supercritical fine technologies in order to develop ultra-pure materials (semiconductor raw materials, nano-fine ceramic materials, etc.) in the U.S. scientific and technological community, and now ultra-pure water has been widely used in biological, pharmaceutical, automotive and other fields.

In addition to water molecules (H20), there are almost no impurities in this water, and no bacteria, viruses, chlorinated dioxins and other organic substances, and of course, no minerals and trace elements needed by the human body, ultra-pure water has no hardness, sweet taste, also known as soft water, can be consumed directly or boiled for drinking. The resistivity of water is greater than 18MΩ*cm, close to 18.3MΩ*cm is called ultrapure water.

02.

How Does The EDI Ultrapure Water Treatment System Work?

>As the water enters the EDI system, the main part flows into the resin/film, while the other part flows along the outside of the template to wash away the ions that pass outside the membrane.

>The resin traps the dissolved ions in the water.

>The trapped ions are electrodeposited with the anion moving in the positive direction and the cation moving in the negative direction.

>The cationic ions pass through the cationic membrane and are discharged outside the resin/membrane.

>The anions pass through the anionic membrane and are discharged outside the resin/membrane.

>Concentrated ions are discharged from the wastewater flow path.

>Anionized water flows out of the resin/film.

03.

EDI Ultrapure Water Treatment System Features

>High and stable quality of produced water.

>Continuous and uninterrupted water production without stopping for regeneration.

>No chemical regeneration is required.

>Small footprint with thoughtful stacking design.

>Easy and safe operation.

>Low operating and maintenance costs.

>No acid/alkali storage or transportation costs.

>Automatic operation, no need for personal attention.

The development of pure water treatment technology has mainly gone through the stages of anion and cation exchanger + mixed ion exchanger; reverse osmosis + mixed ion exchanger; reverse osmosis + electric deionization device. Pretreatment + reverse osmosis + electrodeionization complete desalination system, with the incomparable advantages of other treatment systems, is widely used in the preparation of pure water, high purity water.

04.

EDI Ultrapure Water Treatment System Applications

>Power Plant Chemical Water Treatment

>Ultra-pure water for electronics, semiconductor and precision machinery industries

>Pharmaceutical Industry Process Water

>Preparation of food, beverages, drinking water

>Desalination of seawater and brackish water

>Water for fine chemical industry and fine chemical industry

>Other Industry Requirements

05.

Electronic Ultra Pure Water Treatment System Overview

The water produced by applying distillation, reverse osmosis, deionization or other appropriate supercritical fine technology has almost no impurities other than water molecules (H20), and no bacteria, viruses and other organic matter.

Electronic ultra-pure water systems can meet the needs of semiconductors, integrated circuit chips and packaging, liquid crystal displays, high-precision circuit boards, optoelectronic devices, all kinds of electronic devices, microelectronics industry, large-scale and ultra-large scale integrated circuits for a large number of pure water, high purity water, ultra-pure water cleaning semi-finished and finished products. The higher the degree of integration of integrated circuits, the narrower the line width, the higher the requirements for water quality. At present, China’s Ministry of Electronics Industry divides the electronic grade water quality technology into five industry levels, which are 18MΩ.cm, 15MΩ.cm, 10MΩ.cm, 2MΩ.cm, and 0.5MΩ.cm to distinguish different water qualities.

06.

Features Of Electronic Ultra Pure Water Treatment System

Ultra-pure water systems in the electronics industry are usually composed of a pre-treatment system with multi-media filters, activated carbon filters, and precision filters, an RO reverse osmosis host system, and an ion exchange mixed bed (EDI electric desalination system) system, which constitute the main equipment system. The water tank is equipped with a liquid level control system, the pump is equipped with a high and low pressure pressure protection device, online water quality testing control instruments, electrical modular combination of PLC, and communication remote transmission to the central control room computer, to achieve on-site and centralized control of two modes of operation, while in the process of material selection using the recommended and customer requirements of a unified approach, so that compared with other similar products, the equipment has a higher cost effectiveness and Equipment Reliability.

07.

Electronic Ultra Pure Water Treatment System Applications

1. Ultra-pure water for semiconductor materials, devices, printed circuit boards, and finished and semi-finished integrated circuits.

2. Ultra-pure water for blending of ultrapure materials and ultrapure chemical reagents.

4、Surface polishing of automobiles and household appliances.

5. optoelectronic products.

6. Other high-tech micro products.

08.

Ultrapure Water Treatment System For Electronics Industry

1. pre-treatment – reverse osmosis – purification tank – ion exchanger – UV lamp – pure water pump – water point.

2. pre-treatment – primary reverse osmosis – secondary reverse osmosis (positively charged reverse osmosis membrane) – purification tank – pure water pump – UV lamp – water point.

3. pretreatment – reverse osmosis – intermediate water tank – intermediate water pump – EDI device – purified water tank – pure water pump – UV lamp – point of use.

4. pretreatment → UVC germicidal device → primary RO device → secondary RO device → intermediate water tank → EDI device → deoxygenation device → nitrogen seal pure water tank → TOC removal UV device → polishing mixed bed → ultrafiltration device → water point.

5. water quality conforms to ASTM standards, the Ministry of Electronics ultra-pure water quality standards (18MΩ*cm, 15MΩ*cm, 2MΩ*cm and 0.5MΩ*cm four levels).

6. ultrapure water system reverse osmosis (membrane separation) method ultrapure water manufacturing technology

09.

Ultrapure Water Treatment System Applications

Ultra-pure water system system for ultra-pure water commonly used process methods are filtration, distillation, ion exchange, reverse osmosis, adsorption, ultraviolet oxidation and so on. Ultrapure water systems can generally be divided into four major steps in the water purification process, pretreatment (primary purification), reverse osmosis (to produce pure water), ion exchange (to produce 18.2MΩ.cm ultrapure water) and terminal treatment (to produce ultrapure water to meet special requirements). What are the uses of ultrapure water systems, let’s take a look.

The main uses and principles of ultrapure water systems

Ultra-pure water is primarily used for.

Water for animal and plant cell culture

Water for all kinds of medical biochemical instruments, analyzers, and hemodialysis instruments.

Analytical reagents and dilution water for drug preparation

Water for physiological, pathological and toxicological experiments

Purified water and high purity water for hospitals, pharmaceutical preparation rooms and central laboratories.

Atomic absorption spectroscopy with water

Water for in vitro fertilization

Water for high performance liquid chromatography and ion chromatography

Others are also widely used in key industries such as universities, scientific research, pharmaceutical companies, electric power, electronics, medical care, disease control, environmental supervision, technical supervision, and large industrial pure water systems.

10.

Ultrapure Water Treatment System Rate Fundamentals

1. Ultra-pure water preparation principle

Ultra-pure water systems are usually composed of a raw water pretreatment system, a reverse osmosis purification system, and an ultra-purification post-treatment system. The purpose of pretreatment is mainly to make the raw water to meet the feed requirements of the reverse osmosis membrane separation module, to ensure the stable operation of the reverse osmosis purification system. Reverse osmosis membrane system is a one-time removal of more than 98% of the original water ions, organic matter and 1 **% microorganisms (theoretically) Z economical and efficient purification method. Ultra-purification post-treatment system through a variety of integrated technology to further remove the remaining trace ions, organic and other impurities in the reverse osmosis water to meet the requirements of the Z final water quality indicators for different purposes.

2. Raw water pretreatment system

The pretreatment system of ultrapure water system is usually composed of polypropylene fiber (PP) filter and activated carbon (AC) filter, and the softening resin filter is also required for the higher hardness raw water. The PP filter cartridge can efficiently remove contaminants such as impurities of mechanical particles above 5μm, rust and large colloids from the raw water and protect the subsequent filters, which is characterized by high dirt-holding capacity and low price. ac activated carbon filter cartridge can efficiently absorb residual chlorine and some organic substances and colloids in the raw water and protect the polyamide reverse osmosis composite membrane from residual chlorine oxidation. The softening resin can remove most of the calcium and magnesium ions in the raw water, prevent the subsequent RO membrane surface scaling and clogging, and improve the water recovery rate.

3. Reverse osmosis pure water system

Reverse Osmosis (RO) is a high-tech membrane separation technology driven by pressure difference, with a high degree of primary separation, no phase change, simple and efficient features. Reverse Osmosis membrane “pore size” has been as small as nanometers (1nm = 10-9m), in the scanning mirror can not see any surface “filter” pores. Under the operating pressure higher than the osmotic pressure of raw water, water molecules can reverse osmosis through the RO semi-permeable membrane to produce pure water, while a large number of inorganic ions, organic matter, colloids, microorganisms, pyrogens, etc. in raw water are retained by the RO membrane.

4. The operation and control of the ultra-pure water system uses microcomputer chip programmed control.

Man-machine touch interface intelligent control, automatic water making and stopping, system protection and alarm indication, RO membrane automatic flushing, system flushing, pure water standby indication, quality separation of water supply, water quality online monitoring display, quantitative water switch, ultrafiltration filter, ultraviolet lamp, and other treatment methods to ensure high quality of water.

11.

How Ultrapure Water Treatment Systems Work

An ultrapure water system is a pure water device that integrates ultrapure water preparation, water storage, and delivery. What is the principle pretreatment of ultrapure water systems? Ultrapure water is produced by applying distillation, deionization, reverse osmosis, or other appropriate supercritical fine technologies to the development of ultrapure materials (original semiconductor materials, fine ceramic nano-materials, etc.) that have a resistivity greater than 18 MΩ*cm, or close to the 18.3 MΩ*cm limit (25°C).

In simple terms, it is water that removes almost all atoms except oxygen and hydrogen. Such water is difficult to achieve the extent of the general process, theoretically you can use secondary reverse osmosis and then through the series of hybrid exchange resin columns to treat the secondary reverse osmosis water, but the exchange resin regeneration inconvenience, quality is difficult to guarantee.

12.

Ultrapure Water Treatment System Processes

1 pretreatment system → reverse osmosis system → intermediate water tank → coarse mixing bed → fine mixing bed → pure water tank → pure water pump → ultraviolet sterilizer → polishing mixing bed → precision filter → water object (≥18MΩ.CM) (traditional process)

2. pretreatment → reverse osmosis → intermediate water tank → water pump → EDI device → purification tank → pure water pump → UVC sterilizer → polishing mixed bed → 0.2 or 0.5μm precision filter → water object (≥ 18MΩ.CM) (ZXin process)

3. pretreatment → first-stage reverse osmosis → dosing machine (PH adjustment) → intermediate water tank → second-stage reverse osmosis (positively charged reverse osmosis membrane) → pure water tank → pure water pump → EDI device → UV sterilizer → 0.2 or 0.5μm precision filter → water object (≥ 17MΩ.CM) (Zxin process)

4 Pretreatment → reverse osmosis → intermediate water tank → water pump → EDI device → pure water tank → pure water pump → UVC germicidal device → 0.2 or 0.5μm precision filter → water object (≥ 15MΩ.CM) (Zxin process)

5 Pretreatment system → reverse osmosis system → intermediate water tank → pure water pump → coarse mixing bed → fine mixing bed → ultraviolet sterilizer → precision filter → water object (≥ 15MΩ.CM) (traditional process) The above processes have their own advantages, you can buy according to your own situation for your process. With the development of science, many new processes have replaced the old ones.

Purified water systems generally refer to a class of devices designed to purify water through a variety of water treatment processes and water quality monitoring systems. Common impurities in natural water include soluble inorganic matter, organic matter, particulate matter, microorganisms, soluble gases, etc. The purpose of an ultrapure water system is to remove these impurities as thoroughly as possible. Ultra-pure water systems are designed to dispose of these impurities as thoroughly as possible. Currently commonly used process methods to purify water are distillation, reverse osmosis, ion exchange, filtration, adsorption, ultraviolet oxidation and so on.

Ultrapure water purification process

Ultrapure water systems can generally be divided into four major steps in the water purification process, pretreatment (primary purification), reverse osmosis (to produce pure water), ion exchange (to produce 18.2MΩ.cm of ultrapure water) and terminal treatment (to produce ultrapure water to meet special requirements).

1 Pretreatment

As the pretreated water will be further purified by reverse osmosis, it is important to remove as many impurities as possible that affect the reverse osmosis membrane; mainly including large particles, residual chlorine, and calcium and magnesium ions. In order to solve this problem, we design precision filters, activated carbon adsorption filters and softening resins to specifically remove large particles, residual chlorine and calcium and magnesium ions from the water to achieve the best pretreatment effect.

2. reverse osmosis

Reverse osmosis is the use of a high-pressure pump to provide a high concentration of solution pressure than the osmotic pressure difference, water molecules will be forced through a semi-permeable membrane to the side of the low concentration, reverse osmosis can filter 90% – 99% of most pollutants including inorganic ions, because of its superior purification efficiency, reverse osmosis is a very effective technology for water purification systems, because reverse osmosis can remove most of the contaminants.

3. ion exchange

Ion exchange is the exchange of positive ions in the water with H+ ions in the ion exchange resin, and the exchange of negative ions in the water with OH- ions in the ion exchange resin, thus achieving the purpose of water purification. The ion exchange can remove almost all ionic substances, and the resistivity of the water can reach 18.2 MΩ at 25°C. The quality of the water from the ion exchange depends on the quality of the ion exchange resin and the exchange efficiency of the water and resin in the exchange column.

4. terminal treatment

Ultra-pure water is mainly produced according to the special requirements of customers, such as ultra-low organic type, sterile type, and heat source free type. There are various treatment methods for different requirements, such as ultrafiltration for removing heat sources, dual wavelength UV oxidation for reducing total organic carbon (TOC) in water, microfiltration for removing bacteria, and so on. Ultrafiltration (UF) membranes are molecular sieves that allow the solution to pass through extremely fine membranes, based on size, in order to separate the different size molecules in the solution and reduce the heat source content in ultra-pure water to less than 0.001 EU/ml. Dual-wavelength ultraviolet oxidation reduces the total organic carbon concentration in ultrapure water to less than 5 ppb by photo-oxidation of organic compounds.

13.

Laboratory Ultra Pure Water Treatment System Maintenance

Laboratory ultra-pure water system maintenance in the field of laboratory water in China has a certain degree of popularity, but inevitably some failures will occur in the long use and excessive number of applications, laboratory ultra-pure water system repair how to repair it?

Water leakage is one of the common failures of water-related devices Z, ultra-pure water machine work will appear after the hose joints connection leakage phenomenon, mostly because the pipe joints and connection location is not connected in place, the solution to this failure is very simple, as long as the water hose can be flushed with a new installation, after reinstallation if there is still leakage, it is necessary to check the water pipe and connections are not blocked by foreign objects, if it is immediately! Clean up. If it is not, check whether there are signs of broken water pipes, broken water pipes can not be used, should be replaced immediately.

When the diaphragm pump leaks, you must disassemble the pump body and ask a professional to repair or replace it.

In addition, there is a location of the laboratory ultra-pure water system will also be leaking, that is, the reverse osmosis membrane pressure vessel joint location, the location of water leakage and this paper said diyi a solution to water leakage failure is much the same, as long as the pressure vessel connection location can be re-tightened.

14.

Laboratory Ultrapure Water Treatment System Workflow

Reverse Osmosis (also known as Reverse Osmosis) Technology: Reverse Osmosis is the original name of REVERSE OSMOSIS, which is a multi-national collection of scientists at NASA, supported by the government, spending billions of dollars, after years of research. The principle of reverse osmosis is to exert more pressure on the raw water side than the natural osmosis pressure, so that the water molecules from the high concentration side of the reverse osmosis to the low concentration of the party. As the aperture of the reverse osmosis membrane is much smaller than the virus and bacteria hundreds of times or even thousands of times more, so a variety of viruses, bacteria, heavy metals, solid soluble matter, organic pollution, calcium and magnesium ions simply can not pass the reverse osmosis membrane, so as to achieve the purpose of water purification.

The principle of laboratory ultra-pure water system is similar, the tap water through the precision filter and activated carbon filter cartridge pretreatment, filtering sediment and other particles and adsorption odor, so that the tap water becomes cleaner, and then through the reverse osmosis device for water purification and desalination, purified water into the water storage tank storage, the water quality can reach three levels of water standards, while the reverse osmosis device produced water wastewater (also known as “thick water”) discharged.

Reverse osmosis purified water through the purification column for deep desalination treatment to get a level of water or ultrapure water, Z if there are special requirements, the ultrapure water with ultraviolet sterilization or micro-filtration, ultrafiltration and other devices to remove the residual bacteria, particles, heat source, etc.. Precision filter cartridge, activated carbon filter cartridge, reverse osmosis membrane, purification column is a relative life of the material, precision filter cartridge and activated carbon filter cartridge is actually the protection of the reverse osmosis membrane, if they fail, then the load on the reverse osmosis membrane increased, shortened life, if you continue to turn on the words, the resulting pure water quality declined, and then increased the burden of the purification column, the purification column will be shortened life. Increases the cost of using an ultrapure water machine.

please click here to watch the production process of ultra pure water treatment.