First，Overview of purified water equipment   

The "Chinese Pharmacopoeia" (2000 edition) stipulates: "Purified water is water used for medicine prepared by distillation, ion exchange, reverse osmosis or other suitable methods." It is no longer limited to "distillation". Craft. This change in the Pharmacopoeia is a major advance in the history of the development of my country's pharmaceutical water production. The Pharmacopoeia defines water for injection as "water obtained by distillation of purified water". The USP has clearly stipulated in 7 consecutive editions that reverse osmosis (RO) can be used as a legal method for preparing water for injection, showing people's confidence in the use of membrane technology to produce pharmaceutical water. Membrane separation method to produce pharmaceutical water is an inevitable trend in the development of pharmaceutical water technology. At present, most domestic and foreign pharmaceutical companies use ion exchange, reverse osmosis, and ion exchange combined methods to prepare purified water, and then use distillation to prepare water for injection. In the above pharmaceutical water production process, ion exchange technology is still widely used as a deep desalination method. However, when the ion exchange resin is regenerated, a large amount of waste acid and waste alkali will be produced, which seriously pollutes the environment and restricts development. The reverse osmosis membrane can achieve 100% removal rate of bacteria, pyrogens, viruses and organic matter in the water. Although secondary reverse osmosis can eliminate the use of ion exchange resins, it requires high salt content in the raw water, because the current system desalination rate of reverse osmosis devices is about 98%. If the salt content of the raw water is high, the conductivity of the produced water is low. Will exceed the control index. Medical pure water has relatively stricter and higher water quality requirements. It is often required that the resistance value of ultrapure water should be higher than 15 megabytes. In order to ensure the safety of ultrapure water for medical use, the entire system of ultrapure water treatment equipment is also made up of all stainless steel materials, and sterilization devices must be equipped before the water point. Based on the characteristics of ultra-pure water used in the entire pharmaceutical industry, our company adopts new processes such as reverse osmosis and EDI to meet the different requirements of different users for high-purity water, and designs a complete set of high-purity water treatment processes in a targeted manner to meet the needs of pharmaceutical factories and hospitals. The water requirements for the production of purified water and the production of large infusion solutions.

Second, the process of purified water equipment can be roughly divided into the following categories:

1. Raw water → raw water pressure pump → multi-media filter → activated carbon filter → water softener → precision filter → reverse osmosis equipment → intermediate water tank → intermediate water pump → ion exchanger → purified water tank → pure water pump → ultraviolet sterilizer → micro Pore ​​filter → water point

2. Raw water → raw water pressure pump → multi-media filter → activated carbon filter → water softener → precision filter → reverse osmosis → PH adjustment → intermediate water tank → second stage reverse osmosis (the surface of the reverse osmosis membrane is positively charged) → purification Water tank → pure water pump → ultraviolet sterilizer → microporous filter → water point

 3. Raw water → raw water pressure pump → multi-media filter → activated carbon filter → water softener → precision filter → reverse osmosis machine → intermediate water tank → intermediate water pump → EDI system → purified water tank → pure water pump → ultraviolet sterilizer → microporous Filter → water point

Third, Process comparison of three kinds of purified water equipment

At present, there are basically three processes for preparing ultrapure water for the electronics industry, and the rest of the process flows are mostly derived from the above three basic process flows through different combinations and collocations. Their advantages and disadvantages are listed below:

1. The advantage of using ion exchange resin is that the initial investment is small and the space occupied is small, but the disadvantage is that it needs frequent ion regeneration, consumes a lot of acid and alkali, and has certain damage to the environment.

2. The second type uses reverse osmosis as pretreatment and is equipped with ion exchange equipment. Its characteristic is that the initial charge is higher than that of ion exchange resin, but the regeneration cycle of ion equipment is relatively long, and the acid and alkali consumption is more expensive than pure ion. The way of resin is much less. But it is still destructive to the environment.

3. The third type uses reverse osmosis as pretreatment and equipped with an electro-deionization (EDI) device. This is currently an economical and environmentally friendly process for preparing ultra-pure water, and does not require acid and alkali for regeneration. It can continuously produce ultra-pure water, which is not harmful to the environment. The disadvantage is that the initial investment is too expensive compared to the above two methods.

Huaibei Yuanyi Water Purification Technology Co., Ltd. specializes in the production and operation of industrial water treatment equipment, single-stage reverse osmosis equipment, two-stage reverse osmosis equipment, deionized water equipment, desalinated water system, direct drinking water equipment, drinking water system, mountain spring water equipment, natural Mineral water equipment, drinking pure water equipment, ultra-pure water equipment, high-purity water equipment, EDI electrodialysis system, medical purified water equipment, integrated sewage treatment equipment, bottled water plant equipment, bottled water plant equipment, barrel filling machine, Three-in-one vial line, brushing barrel cap removing machine, bottle cap disinfection machine, air shower room, air purifier, purification workbench, light inspection box, laboratory equipment, QS certification equipment and water treatment agent scale inhibitor.