Reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membrane, and it is the core component of reverse osmosis technology. The principle of reverse osmosis technology is that under the action of higher than the osmotic pressure of the solution, these substances and water are separated according to the fact that other substances cannot pass through the semi-permeable membrane. The pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation.ro membrane
UF membrane The ultrafiltration membrane has an asymmetrical microporous structure and is divided into two layers: the upper layer is a functional layer, which has dense micropores and the function of intercepting macromolecules, and its pore size is 1-20nm; the lower layer has a support layer with a large through-hole structure, which increases The role of large film strength.
The functional layer is thin and the water permeable flux is large. Generally, various types of components such as tube type, plate type, roll type, capillary type, etc. are made first, and then multiple components are assembled together to increase the filtration area. The membrane ultrafiltration process is essentially a mechanical screening process, and the size of the pores on the membrane surface is the most important controlling factor. The solute (polymer or solution) that can be separated by the ultrafiltration membrane is a molecule with a size of 1-30nm. In addition to the characteristics of the membrane, the substances it rejects are also related to the shape, size, flexibility and operating conditions of the substance molecules. Cellophane and nitrocellulose membranes used in early ultrafiltration membranes
