1、 Ultra pure water equipment:

Ultra pure water equipment is a water treatment device that uses pre-treatment, reverse osmosis technology, ultra purification treatment, and post-treatment methods to almost completely remove conductive media from water, and also remove colloidal substances, gases, and organic matter that do not dissociate from water to a very low level.

The desalination core component of ultra pure water system equipment is the imported reverse osmosis membrane module. Ultra pure water system equipment usually consists of a pretreatment part, a reverse osmosis host part, and a post-treatment part.

1. Pre treatment reasons include quartz sand filter, activated carbon filter, fully automatic water softener, precision filter (our company uses fully automatic control valve head), and ultrafiltration system can also be used as pre-treatment, but usually the engineering cost is high. The main purpose of pretreatment is to remove sediment, rust, colloidal substances, suspended solids, color, odor, and biochemical organic matter contained in raw water. When the hardness of the raw water is high, a fully automatic water softener can be selected, which effectively protects the reverse osmosis membrane and extends its service life.

2. The reverse osmosis host mainly consists of a high-pressure pump, membrane housing, imported reverse osmosis membrane components, online instruments, control electrical components, etc. As long as the number of membranes and pump model selection are appropriate, the desalination rate and water production of the reverse osmosis host can reach the rated indicators, and the effluent conductivity can be guaranteed to be ≤ 10us Below CM, (raw water conductivity less than 500us/cm, operating temperature: 1-40 ℃)

3. The post-processing part is to further refine the pure water produced by reverse osmosis to produce ultrapure water, usually using ion exchange mixed bed equipment or EDI equipment. According to customer requirements, the effluent resistance can reach 18.2 M Ω CM， If it is applied to the direct drinking water process, a sterilization device, usually a UV sterilizer or ozone generator, can be added to make the produced water meet the direct drinking standard.

The exchange reaction takes place in the pure chemical chamber of the module, where anion exchange resins exchange anions (such as chloride ions Cl) in dissolved salts with their hydrogen and oxygen ions (OH). Correspondingly, cation exchange resins use their hydrogen ions (H) to exchange cations (such as Na) in dissolved salts.

2、 Process type:

1. Ion exchange method:

The process is as follows:

Raw water → raw water booster pump → multi-media filter → activated carbon filter → water softener → precision filter → cation resin filter bed → anion resin filter bed → anion resin mixed bed → microporous filter → water point

Intermittent ion exchange:

This operation method involves mixing the ion exchange resin with the raw water to be treated and stirring appropriately to achieve exchange equilibrium, so that the water quality after equilibrium meets the design requirements. This method is usually used for small-scale production or experimental needs.

Fixed bed ion exchange:

It is one of the most commonly used ion exchange methods, which involves placing ion exchange resin in an exchange column, and the treated raw water flows through the resin bed at a certain flow rate to achieve the exchange purpose. This method has simple equipment, easy operation, and is practical for production of various scales, but its resin utilization rate is low and the regeneration cost is high.

2. Dual stage reverse osmosis method

The process is as follows:

Raw water → Raw water booster pump → Multi medium filter → Activated carbon filter → Softener → Precision filter → Primary reverse osmosis → PH adjustment → Intermediate water tank → Secondary reverse osmosis → Pure water tank → Pure water pump → Microporous filter → Water point.

3. EDI method

Advantages of EDI Ultra Pure Water Equipment Technology

EDI ultra pure water equipment is widely accepted in the pharmaceutical industry, microelectronics industry, power generation industry, and laboratories. The applications in surface cleaning, surface coating, electrolysis industry, chemical industry, and solar photovoltaic industry are becoming increasingly widespread.

EDI can replace traditional mixed ion exchange technology (MB-DI) to produce stable deionized water. EDI technology has the following advantages compared to mixed ion exchange technology:

1. The amount of ion exchange resin used is relatively small, about 5% of the amount of resin used in traditional ion exchange methods.

2. Ion exchange resin does not require acid or alkali chemical regeneration, saving a lot of acid, alkali, and cleaning water, greatly reducing labor intensity.

3. No waste acid or alkali liquid discharge, it is a clean production technology and an environmentally friendly product.

4. The process is easy to achieve automatic control, and the quality of the produced water is stable. Combined with RO and other water treatment technologies, it can form a complete production line for pure water and ultrapure water.

5. The quality of the produced water is high and can meet the national electronic grade water I standard. The electrical resistivity is 15-18M Ω· cm, and the bacterial endotoxin content is less than 0.1mg/L, which fully meets the requirements of the Chinese Pharmacopoeia and the United States Pharmacopoeia for pharmaceutical water.

6. It has excellent ability to remove weakly dissociated substances such as carbon dioxide, silicon, boron, ammonia, etc., making it more suitable for the needs of ultrapure water.

7. The pure water production process is carried out continuously, without the need to repeatedly set up one set in use and one set for regeneration like ion exchange beds

The operation process is as follows:

Raw water → Raw water booster pump → Multi medium filter → Activated carbon filter → Softener → Precision filter → Primary reverse osmosis host → Intermediate water tank → Intermediate water pump → EDI system → Microporous filter → Water point

3、 System application

1. Electronic and semiconductor industries: producing pure water and ultrapure water machines for industrial use in the electronic industry, such as monocrystalline silicon semiconductor integrated circuit blocks, picture tubes, glass shells, liquid crystal displays, etc.

2. Water used in the pharmaceutical industry: water used in pharmaceutical and formulation processes, medical hemodialysis, biochemical analysis, infusion, etc.

3. Boiler water treatment: Softened water and desalinated pure water are required for high, medium, and low pressure boiler feedwater in industries such as petroleum, chemical, refining, thermal power generation, electricity, heat production, metallurgy, food, and papermaking.

4. Beverage industry: purified drinking water, distilled water, natural water, mineral water, mineralized water, pure water for Baijiu blending in liquor production, beer saccharification feeding water, pure draft beer filtration, etc.

5. High quality water supply network systems for hotels, buildings, communities, and water purification for swimming pools.

6. Preparation of deionized water for electroplating processes, pure water for battery production processes, pure water for surface coating and cleaning of automotive, household appliances, and building materials products, pure water for coated glass, and desalinated salt water required for textile printing and dyeing processes.

7. Petrochemical industry: process pure water used in chemical reaction cooling, chemical agents, fertilizers and fine chemicals, and cosmetics manufacturing processes

4、 Process flow

1. Pre treatment system → reverse osmosis system → intermediate water tank → coarse mixing bed → fine mixing bed → pure water tank → pure water pump → ultraviolet sterilizer → polishing mixed bed → precision filter → water object (≥ 18M Ω) CM (Traditional Craftsmanship)

2. Pre treatment → reverse osmosis → intermediate water tank → water pump → EDI device → purified water tank → pure water pump → ultraviolet sterilizer → polishing mixed bed → 0.2 or 0.5 μ m precision filter → water object (≥ 18M Ω) CM)

3. Pre treatment → First stage reverse osmosis → Dosing machine (pH adjustment) → Intermediate water tank → Second stage reverse osmosis (positive charge reverse osmosis membrane) → Pure water tank → Pure water pump → EDI device → UV sterilizer → 0.2 or 0.5 μ m precision filter → Water object (≥ 17M Ω) CM)

4. Pre treatment → reverse osmosis → intermediate water tank → water pump → EDI device → pure water tank → pure water pump → ultraviolet sterilizer → 0.2 or 0.5 μ m precision filter → water object (≥ 15M Ω) CM)

5. Pre treatment system → reverse osmosis system → intermediate water tank → pure water pump → coarse mixing bed → fine mixing bed → ultraviolet sterilizer → precision filter → water object (≥ 15M Ω) CM (Traditional Craftsmanship) Each of the above crafts has its own advantages, and you can choose the craft that suits you according to your own situation. With the development of science, many new processes have replaced old ones. The use of reverse osmosis to produce high-purity water has become popular

5、 Application Fields

EDI ultra pure water equipment is applied in the battery industry, and its application in the industrial sector is very extensive. Ultra pure water used in the battery industry includes pure water for battery production, pure water for lithium battery production, pure water for solar cell production, and pure water for battery grids. The preparation of electrolyte in batteries requires very strict requirements for pure water, usually requiring a conductivity of 0.1us/cm (resistance value of 10 megaohms) or higher. The traditional process for preparing ultrapure water for batteries often uses cation anion resin exchange equipment, but the disadvantage of this process is that the resin needs to be regenerated frequently after a period of use.

1. Electronics, power, electroplating, lighting appliances, laboratories, food, papermaking, daily chemical products, building materials, paint making, batteries, laboratory testing, biology, pharmaceuticals, petroleum, chemical industry, steel, glass and other fields.

2. Pure water is used for chemical process water, chemical agents, cosmetics, etc.

3. Pure water is used for production processes such as monocrystalline silicon, semiconductor chip cutting and manufacturing, semiconductor chips, semiconductor packaging, lead cabinet frames, integrated circuits, liquid crystal displays, conductive glass, picture tubes, circuit boards, optical communication, computer components, capacitor cleaning products, and various electronic components.

4. Food industry water: drinking purified water, mineral water, materials, beer, dairy industry, etc.

5. Desalination of seawater and brackish water: Improvement of domestic water use in islands, ships, and high salinity areas.

6. High quality water supply for buildings and communities: star rated hotels, airports, real estate and property pure water network systems, etc.

7. Process water in the chemical industry: chemical cooling, fertilizer, chemical agent manufacturing.

8. Industrial product manufacturing water: automotive, home appliance painting, coatings, paints, fine processing cleaning, etc.

9. Boiler supply water for the power industry: thermal, thermal power generation boilers, medium and low pressure boiler power systems, fine chemical engineering, and subject water.