Hollow fiber ultrafiltration membrane is one of the polymer material membranes developed and designed in the early stage. It is a microporous filter membrane with a nominal diameter ranging from 0.001 to 0.02 μm. Increase the moderate working pressure on one side of the membrane. The organic solvents in the aqueous solution and some of the solutes with lower relative molecular mass permeate the other side of the membrane from the small pores of the hollow fiber ultrafiltration membrane, and the solutes with higher relative molecular mass or The emulsion micelles are cut, so as to achieve the actual effect of filtration and separation.
In the sewage treatment industry, compared with other filtration technologies, the ultrafiltration membrane technology has a higher filtration residue efficiency, with a filtration accuracy of 99.99%, which can reasonably remove most of the harmful substances in the water; and there are few applications or no organic chemical drugs. It can reasonably prevent the water body from secondary pollution, so the water body after the solution is stronger. From the actual operation point of view, the filtration system software of the ultrafiltration membrane technology has a high level of automation technology, and the operation is simple and reliable. There are only two actual operations of the switch. Because the ro uf membrane has strong chemical reliability, strong acid and alkali corrosion resistance, heat resistance, high temperature disinfection and sterilization, and a wide range of applications.
1. The principle of ultrafiltration membrane technology.
Ultrafiltration membrane technology is a membrane separation technology, and its filtration capacity is between nanofiltration membrane and microfiltration membrane. Its working principle is as follows
According to a semi-permeable membrane, under the action of working pressure, the small molecular water chemicals in the organic solvent and the solute can pass through the filter membrane to reach the other side of the membrane, while the macromolecular substances and colloidal solution in the solute cannot It is blocked by the pores of the filter membrane. As the aqueous solution continues to pass through, more and more chemical substances are blocked on the membrane. Therefore, in order to achieve the effect of ultrafiltration membranes, it is necessary to increase the amount of organic solvents. Working pressure, in addition, the chemical substances produced on the surface of the membrane also exhibit certain organic chemical characteristics, and also have the effect of intercepting and dissolving certain pollutants, so as to achieve the purification of coarse salt.
With the continuous decrease of the filtration rate of macromolecular substances on the membrane surface, the concentration value of electric polarization has appeared. In order to enable the ultrafiltration membrane to continue and rationally perform, the stirring-exhaust ultrafiltration device is often used to remove the concentration in specific work. The value of the polarization situation.
2.The characteristics of ultrafiltration membrane technology.
Compared with other water treatment technologies, ultrafiltration membrane technology has many incomparable advantages:
a. It has high organic chemical reliability, heat resistance, acid resistance and alkali resistance, so it has strong resistance to penetration;
b. The principle is simple, the automation technology is very easy to operate, saving human capital, the actual operation is simple, the maintenance is convenient, and the operation is safe and stable;
c. It is a physical method, and all organic chemical drugs should not be added to the water treatment method, which can reasonably avoid secondary pollution of water quality;
d. High efficiency, which solves the problem of large water flow, especially for drinking water treatment in large cities with low environmental pollution, showing very high efficiency.