Purified water machine [1] is a device used to meet the needs of various industries for producing purified water, mainly used in the pharmaceutical and chemical industries. The entire system is also made of all stainless steel materials and must be equipped with a sterilization device before the water point is used. We have designed a targeted set of high-purity water treatment processes using the latest technologies such as reverse osmosis and EDI to meet the water requirements for purified water production and large infusion production in pharmaceutical factories and hospitals.

Purified aquatic water indicators

Chemical indicators: meet the requirements of the 2005 edition of the Pharmacopoeia of the People's Republic of China for pharmaceutical purified water
Hygiene examination: Microbial 10CFU/100ml
Endotoxin 0.25EU/ml
Conductivity ≤ 2 μ S/cm (resistivity ≥ 0.5 M Ω* CM)
Equipment technical requirements

The system adopts fully automatic control (manual control can also be used), and automatic backwashing and regeneration programs can be set during operation;

The first and second level reverse osmosis systems are equipped with reflux pipelines, and the reverse osmosis equipment is equipped with chemical cleaning and disinfection devices;

A pH adjustment device is installed between the first and second level reverse osmosis to ensure that the conductivity of the produced water meets the requirements of the pharmacopoeia;

The secondary reverse osmosis membrane adopts a positively charged anti pollution reverse osmosis membrane to ensure the long-term stable operation of the reverse osmosis equipment;

The first stage reverse osmosis pipeline is made of 304 stainless steel material, and the second stage reverse osmosis is made of 316L stainless steel material;
Both the first and second stage reverse osmosis equipment are equipped with online conductivity detection instruments, and the conductivity of the produced water can be observed at any time;
There is a low-voltage protection switch before the first level reverse osmosis, and low-voltage and high-voltage protection switches before the second level reverse osmosis;

The first and second level reverse osmosis water recovery rates can be adjusted, with a first level reverse osmosis recovery rate of 60% -65% and a second level reverse osmosis recovery rate of 70%;
All pre-treatment devices are made of original imported parts; UPVC pipes are used for the piping between pre-processing equipment.

The purified water storage tank is equipped with a breathing filter, and the conveying pipeline is equipped with ultraviolet sterilizers and microporous filters to ensure that pure water meets hygiene requirements.
Raw water - Raw water booster pump - Multi medium filter - Activated carbon filter - Softener - Precision filter - First stage reverse osmosis - PH adjustment - Intermediate water tank - Second stage reverse osmosis (with positive charge on the surface of the reverse osmosis membrane) - Purified water tank - Pure water pump - UV sterilizer - Micro pore filter - Water point

Introduction to the main unit functions of the equipment

Multi-media filter
Most multi-media filter tanks are filled with filter media such as quartz sand, anthracite, and manganese sand. Its main function is to reduce water turbidity and remove a large amount of bacteria, viruses, organic matter, etc. from water. This has created favorable conditions for the subsequent disinfection process. Manganese sand has a significant removal effect on iron and manganese.

Activated carbon filter tank
Activated carbon has a large number of micropores and a huge specific surface area, and has extremely strong physical adsorption capacity. It can effectively adsorb impurities in water, especially organic matter and microorganisms. The oxygen-containing catalytic oxidation and chemical adsorption functions formed on the surface of activated carbon can remove some metal ions from water. Activated carbon has a strong adsorption effect on residual chlorine in water, which protects downstream stainless steel equipment and pipeline surfaces and meets the inlet requirements of subsequent water treatment units.

Automatic recoil and regeneration softening tank
Fill the softening tank with sodium cation exchange resin. Through the ion exchange reaction of resin, the hardness of water is reduced, preventing calcium and magnesium ions from binding with carbonate and sulfate ions and scaling in subsequent water treatment equipment or pipelines.

Precision filter
Precision filters, also known as security filters, typically have a filtration accuracy of 5 μ m. Its function is to intercept all substances with a particle size greater than 5 μ m to meet the inlet requirements of reverse osmosis.

counter-infiltration system
The key to the application of reverse osmosis technology lies in the performance of the reverse osmosis membrane that plays a role in desalination. Reverse osmosis membrane is a semi permeable membrane that only allows water molecules to pass through and does not allow solutes to pass through. In addition to applying the principles of reverse osmosis, reverse osmosis technology also utilizes the selective adsorption of membranes and the screening mechanism for organic matter. The pore size of reverse osmosis membranes is mostly less than or equal to 10 × 10-10m, and their separation targets are organic compounds in the ionic range and molecular weight of several hundred in the solution. It can filter out various bacteria, such as one of the smallest bacteria, Pseudomonas aeruginosa (3000 × 10-10m), as well as various viruses, such as influenza virus (800 × 10-10m), meningitis virus (200 × 10-10m), and even pyrogen (10-500 × 10-10m). This is a matter of great concern for pharmaceutical water.
Due to its simple operation process and high desalination efficiency, reverse osmosis has become the preferred water treatment unit in pharmaceutical process water due to its high ability to remove heat and is also relatively economical. Reverse osmosis technology is not only used in the preparation process of purified water, but can also be used to produce water with injection water quality. The United States Pharmacopeia has included this method as one of the legal methods for preparing injection water since the 19th edition

Sterilization system
A、 The orderly combination of oxygen and ultraviolet radiation is used for disinfection/sterilization. Ozone is a strong oxidant, ranking second only to fluorine in terms of oxidation ability among natural elements. Ozone can oxidize and decompose glucose oxidase, which is necessary for the internal oxidation of glucose in bacteria. It can also directly interact with bacteria and viruses to destroy cells, ribonucleic acids, and break down large molecular polymers such as DNA, RNA, proteins, lipids, and polysaccharides, disrupting the metabolic growth and reproduction processes of bacteria. It has significant effects on odor removal, decolorization, sterilization, removal of phenols, cyanide, iron, manganese, and reduction of COD, BOD, etc. in water treatment. Ultraviolet radiation can reduce the rate of new colony formation in the pre-treatment system of water systems, and the 254nm ultraviolet lamp located after ozone can be used for both disinfection and removal of residual ozone.
B、 Circulating reflux to prevent bacterial growth. The pre-treatment system, water production system, and water use system in the purified water system are equipped with circulating water circuits, which are used during holidays or evenings when water is not in use; When the purified water tank is full; When the conductivity of the effluent exceeds the standard, the water in each system should maintain a certain degree of circulation, and if necessary, ultraviolet or ozone/ultraviolet sterilization should be supplemented to prevent bacterial growth.