Reverse osmosis technology is a modern high-tech developed in China in recent years. Reverse osmosis is to apply a pressure greater than the osmotic pressure to the solution, so that water can be separated from the solution through a special semi permeable membrane. This process is called reverse osmosis because it is opposite to osmosis. According to the different osmotic
pressure of various materials, a reverse osmosis method greater than the osmotic pressure can be used for a certain solution to achieve the purpose of separation, extraction, purification and concentration of the solution. The reverse osmosis device is mainly used to separate the ion range in the solution. It does not need heating and has no phase change process. Therefore, it consumes less energy than the traditional method. The reverse osmosis device has small volume, simple operation and wide application range. Using reverse osmosis device to treat industrial water does not consume a large amount of acid and alkali, has no secondary pollution, and its operation cost is relatively low.