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  Both  nanofiltration and reverse osmosis membranes  are used for fine filtration in industrial water treatment. Both of these industrial filtration membranes have very high filtration accuracy. Which one is better compared to nanofiltration and reverse osmosis membranes?   What is the difference between nanofiltration and reverse osmosis membranes? Nanofiltration membrane   is a type of filtration membrane between ultrafiltration and reverse osmosis. The chemical balance between the nanofiltration membrane and electrolyte ions form an electrostatic interaction. The electrolyte salt ions have different charge strengths, resulting in different ion retention rates in the membrane. Due to the presence of negatively charged groups on the  nanofiltration membrane  or membranes, they interact through electrostatic interactions. In multicomponent systems containing ions of different chemical valence, the membranes have different selectivity for different ion...

    Duckbill Valve, also known as Duckbill Check Valve, Duckbill Drain Valve, One Way Valve, which can be designed to provide the customer's required head loss and flow rate for particular applications. A range of materials and designs are available to handle different fluids and service conditions. Duckbill Valve ’ s Material Duckbill Valves   can be made from a variety of materials. The material choice is based on the nature of the material handled, temperature, pressure, and frequency of operation. Elastomeric Duckbill Valve materials are highly resistant to chemicals at high temperatures. However, the mechanical properties of elastomeric materials will be weakened at a higher temperature (above 150 ° F). High pressure can also destroy the valve. Another factor that can affect the duckbill valve function is the concentration of the media it will handle. The material may exhibit satisfactory corrosion resistance to certain corrodents up to a specific concentration and/o...

  Kale is one of the most nutrient-dense foods on the planet, with a wide range of benefits and extraordinarily few calories per serving. It is a cruciferous vegetable like cabbage, broccoli, cauliflower, collard greens, and Brussels sprouts. As one would assume from the name, kale powder is dried and smashed form of fresh leaves. These leaves are generally harvested at optimal ripeness, then air or freeze-dried until they are brittle enough to be gently broken and pulverized into dust. Kale powder  is much more concentrated of a form than the fresh wavy leaves since the water weight has been removed, packing the power of a cup of fresh kale into about a serving of four teaspoons  –  making it far more nutritionally dense than fresh kale and easier to digest. That same serving has more iron than beef per calorie and more calcium than a cup of milk. 1. Protects Your Cells Against Free Radicals Antioxidants are substances that help counteract oxidative damage by free r...

  As an excellent copper metal material, it generally has strong utilization value and can be processed into a variety of common products. Among them, the better materials are concentrated in three categories: brass wire mesh, red copper wire mesh, and phosphor copper wire mesh. . The shape has a mesh shape, and the density and use characteristics have a certain degree of toughness. It is these high-quality toxic substances that bring greater convenience to the needs of our copper wire mesh in various industries. For what is brass wire mesh, and the use of brass wire mesh, etc., I will give you a key introduction here. 1. What is  brass wire mesh First of all, while initially understanding the material, you should also specifically understand what is brass wire mesh, which is composed of 65 brass (about 65% copper and 35% zinc); 80 brass (about copper 80%, zinc 20%) and other substances are processed and mixed into an excellent material. Brass wire mesh has gradually formed a ...

    What are the application scenarios of infrared lenses corrected by special materials? Come and learn about the relevant content with the editor of Fuqing Optical Lens! 1. All-weather surveillance camera The most minor use of  infrared lenses  is to complete all-weather surveillance. The optically corrected infrared lens can focus clearly during the day, and usually needs to be refocused in the morning. The infrared lens corrected by a special material can make visible light and infrared focus to the same focus, so after the focus is clear during the day, the infrared lens is turned on at night. The fill light can still image clearly. Second, through the fog Fog penetration originates from the monitoring requirements in long-distance and complex environments. Fog is composed of coarse particles floating in the air. The more particles per unit volume, the denser the fog. Visible light has shorter wavelengths and cannot penetrate mist, which is why visibility is ver...

    There are 4 weaving methods for copper wire mesh: 1. Plain weave: Plain weave is a weaving method in which each warp thread crosses over each weft thread, the diameter thread is the same thickness as the weft thread, and the warp thread and the weft thread form a 90-degree angle. The plain weave mesh is relatively square, and the mesh size is uniform. Each warp thread crosses above and below each weft thread, the diameter thread is the same thickness as the weft thread, and the warp thread and the weft thread are woven at a 90-degree angle. ​​ 2. Twill weave: Weaving method in which each warp thread crosses up and down every 2 weft threads, and each weft thread crosses over each 2 diameter threads. ​ 3. Dense weave: Warp and weft have different wire diameters and different mesh numbers, characterized by dense warp and weft, and fine warp and weft. The length direction is the warp, and the width direction is the weft. Dense mesh is further divided into mat type mesh plain w...

    The world's best movable dam - hydraulic lifting dam was born in China. Its advanced nature is a qualitative breakthrough to the traditional movable dam. It is manifested in the following aspects: 1. Low cost The overall cost of hydraulic lifting dams is only a fraction of that of sluices and rubber dams of the same size. The movable dam part is the same as the ordinary flap door, which is lower than the hydraulic flap door. The width of the top of the fixed weir is only required to be equal to the height of the movable dam, so the overall engineering investment is the lowest. 2. The hydraulic lifting dam is firm and reliable in structure and has a long service life. After the dam surface is raised, a stable supporting pier structure and a fixed triangular support are formed. The mechanical structure is the most scientific and the ability to resist flood shock is extremely strong. The service life is more than 50 years. 3. The flood discharge capacity of the  hydrauli...