Ultrapure water equipment plays an important role in modern industry, medical treatment, scientific research and other fields, and their main function is to remove impurities in water and provide high purity water quality. However, why is the primary reverse osmosis technology generally not used in the preparation of ultrapure water equipment?Today, Zhuangyuan Wang Purification Water will give you detailed answers from several aspects
1. What is primary reverse osmosis?
First, let's understand what primary reverse osmosis is. First-stage reverse osmosis is a water treatment method that uses the principle of semi-permeable membrane to separate dissolved solids, organic matter, colloids and other substances in water by pressure drive. In this process, the water is forced through a semi-permeable membrane, and the impurities dissolved in the water are retained, resulting in purer water. Generally, we become the first-class reverse osmosis filtered water as pure water.
2. Requirements for ultrapure water equipment.
Ultrapure water, also known as UP water, refers to water with a resistivity of 18 m*cm (25). In addition to water molecules, there are almost no impurities in this water, and there are no bacteria, viruses, chlorinated dioxins and other organic matter, this water quality requirements are very strict, and usually require the use of a combination of treatment methods to meet the requirements.
The main water purification element of the ultrapure water equipment is the EDI module, and the use of several stages of reverse osmosis is mainly determined by the quality of the raw water. If the quality of the raw water is relatively good, it is completely possible to use one-stage reverse osmosis, but if the water quality is poor, it is necessary to use two-stage reverse osmosis, mainly to protect the EDI device. Before designing the equipment process, it is necessary to do a good job in monitoring the water quality of the raw water, so that the suitable water purification equipment can be designed, and the equipment can be avoided from unnecessary damage. According to the current water quality situation in China, it is generally necessary to go through the second stage of reverse osmosis, the first level of pure water, the second level of high purity water, and then through EDI is ultrapure water