Filtration application of 3M large flow filter element in condensate water of power plant

Whether it is groundwater or surface water, it may always contain colloids formed by iron-aluminum colloids, silica gels, organic colloids and other adjuvants. All of them may be deposited on the surface of RO membrane to form colloid fouling and colloid fouling, which will increase the system pressure difference, reduce the water production rate, decrease the salt rejection rate and make backflushing difficult. Therefore, in order to improve the performance of the RO membrane and increase the service life of the membrane, the RO system needs to be pre-filtered to remove impurities and colloids with larger particle sizes in the raw water. Generally, the raw water should be filtered twice before the RO membrane: one is coarse filtration, which uses sand filtration or precipitation to remove large particles of impurities in the raw water; the other is pre-filtration, that is, a security filter is used to remove raw water with filter elements or filter bags. Small and medium particle impurities. The 3M high-flow filter element integrates advanced technologies such as polypropylene (PP) melt-blown, fiber multi-composite and technical discount, so that the high flow rate of a single filter element can reach 110t/h, giving the filter element high precision, high efficiency, high flow, and deep depth. With the characteristics of filtration and long service life, the absolute filtration accuracy of the filter element in the range of 1~70μm reaches 99.9%. At the same time, the filter element adopts O-ring seal and unique guide tube design, which can ensure the filtration efficiency and prevent side leakage. The fibrous structure of the 3M high-flow filter element is loose, and the high porosity increases the volume and interception of impurities. In addition, it has a deep three-dimensional filtration effect, which is a double deep retention, that is, larger particles and impurities are retained on the surface of the fiber, while fine particles are captured in the deep layer of the filter material, so the filtration efficiency of the filter element has a gradient effect. Judging from the filtration efficiency data of 3M high-flow filter element HF004 model, the declared accuracy and filtration efficiency of HF004 filter element are 99.9% at 5μm, but in the test, the filtration efficiency of HF004 filter element at 5μm is greater than 99.9%, and the filtration of 3μm particulate impurities The efficiency reaches more than 99.5%. This means that the 3M high-flow filter element in practical application can filter solid particle impurities smaller than the declared accuracy. When choosing a boiler feed water security filter, it is recommended to choose a melt spray or other deep filter element with a rigid structure and high dirt capacity, which can achieve a good filtering effect. For some applications with high flow and high filtration precision, 3M high-flow filter element is a better choice. In addition, the filter operating cost is not determined by the price of the filter element but is measured by the cost-effectiveness of the entire filter system. ?
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