Reverse osmosis (RO) pure water equipment

2023-06-30

Reverse osmosis (RO) pure water equipment

Technology introduction: technology is a modern high-tech developed in our country in recent years. Reverse osmosis is to apply a pressure greater than the osmotic pressure to the solution, so that water can pass through a special semi-permeable membrane and be separated from the solution. Because this process is the opposite of osmosis, it is called reverse osmosis. According to the different osmotic pressures of various materials, the reverse osmosis method that is greater than the osmotic pressure can be used for a certain solution to achieve the purpose of separating, extracting, purifying and concentrating the solution. The reverse osmosis device mainly separates the range of ions in the solution. It does not require heating, and there is no phase change process, so it consumes less energy than traditional methods. The reverse osmosis device is small in size, easy to operate, and has a wide range of applications. Using a reverse osmosis device to treat industrial water does not consume a lot of acid and alkali, no secondary pollution, and its operating costs are relatively low. Reverse osmosis membrane separation technology, referred to as RO technology.

Working principle: Simply put, there are many pores on the reverse osmosis semi-permeable membrane, and the size of these pores is equivalent to the size of water molecules. Since bacteria, viruses, most organic pollutants and hydrated ions are much larger than water molecules, Therefore, it cannot pass through the reverse osmosis semi-permeable membrane and separate from the water that passes through the reverse osmosis membrane. Among the many impurities in water, soluble salts are the most difficult to remove. Therefore, the water purification effect of reverse osmosis is often determined according to the desalination rate. The desalination rate of reverse osmosis is mainly determined by the reverse osmosis semi-permeable membrane selectivity. The salt removal rate of the reverse osmosis membrane element with higher selectivity can be as high as 99.7%.

The reverse osmosis system is an important part of the pure water production device. In order to ensure the long-term stability of the reverse osmosis system, it is necessary to carry out pretreatment for different influent water quality to avoid pollution or blockage of the reverse osmosis system due to poor water quality.

For the reverse osmosis system, the incoming water is customarily divided into groundwater, tap water, surface water, seawater, waste water (reclaimed water), etc. These water bodies are affected by various factors, different geographical conditions, and different seasonal climates lead to the characteristics and characteristics of the water body. The impurities it contains are different, so the reverse osmosis pretreatment process will also be different.

. Reasonable pretreatment should be able to meet the following requirements:

1. The reverse osmosis pretreatment must be able to remove most of the impurities in the raw water to meet the requirements of influent water;

2. The reverse osmosis pretreatment must consider the change of water quality to prevent the stable operation of the whole system from being affected when the raw water quality fluctuates;

3. The reverse osmosis pretreatment process must be able to operate efficiently and stably, and at the same time simplify the process as much as possible to reduce investment and operating costs;