What is the recovery rate of reverse osmosis water purification equipment?

This key decision is made from the following two elements to low value consumables.

The recovery rate of reverse osmosis system also endangers the quality of permeate water. The higher the recovery rate, the higher the concentration of concentrated water discharged from the rear of the system, and the higher the concentration of permeated water in the relative rear membrane components. In some RO applications, the quality of permeate water is also sufficient to limit the system recovery rate. For large and medium-sized RO systems, the recovery rate is generally limited by the tendency of insoluble salt fouling, which is limited by the high concentration of concentrated water; For small and medium-sized RO systems, the recovery rate is generally less than 30qo~50%. At lower recovery rates, RO equipment can operate safely without manipulating the solubility of insoluble salts. Cost fees are generally not a priority consideration for small and medium-sized RO systems.

The general recovery rate of the sea surface RO system is 30%~45%, which is mainly determined by the sea surface osmotic pressure. For the sea surface with a salinity of 35000Mg/L, the osmotic pressure reaches 2.8MPa. Currently, the maximum operating pressure of pressure vessels produced is generally 7.OMPa and 8.4MPa. The general operating recovery rate of the RO system for brackish water is 50% to 80%. In the case of moderate preparation treatment, a 75% recovery rate is generally selected, which is also known as the standard system recovery rate.

The key decision of the reverse osmosis system is made by the following two elements:

(1) When selecting a 75% recovery rate, a 6m long pressure vessel (containing 6 40 inch long membrane components or 4 60 inch long membrane components) can be used. The optimal recovery rate for each pressure vessel is 50%. When using a 2:1 sorting method, the system recovery rate is 75%. This sorting method does not require the use of a concentrated water circulation system, and can convert a very high proportion of water supply and drainage into permeable water.

(2) According to equation (2-19), there is a correlation between commodity water and system recovery rate as follows:

Assuming that the multiplication of the salt permeability rate SP and the water supply and drainage concentration c in the equation is the parameter K,

That is, K=SP. Cf equation (4-8) can be used for (edi pure water machine equipment)

专业水处理的疑难问题，产品选型问题，可以单击下面的微信二维码电话联系贺工在线指导，长按微信二维码可自动识别添加贺工微信沟通解决您的疑难问题