How to replace the filter technology of reverse osmosis equipment

How to replace the filter technology of reverse osmosis equipment
What should I do when the reverse osmosis device is first run?
The air in the pipeline is driven away by the method of low pressure and low flow, and only the air in the pipeline does not exist for the equipment to operate normally. First, the pressure should be maintained between 0. 2 and 0. 4 MPa. When using low pressure flushing and venting, the produced concentrated water and produced water are discharged into the sewer. If the pressure rises faster during operation, this is the presence of air in the membrane element, which will produce a water flow and a radial impact. In such a case, the outer sheath of the membrane may be broken, resulting in a situation in which the reverse osmosis membrane is not repairable. When using for the first time, it is necessary to adjust the pressure of the membrane operation to 0. 2~0. 4MPa for flushing, to ensure that the reverse osmosis system automatically flushes the reverse osmosis membrane function every time it starts.
Reverse osmosis equipment nanofiltration is a membrane liquid separation technology located between reverse osmosis contract ultrafiltration. Reverse osmosis can remove small solute of zui. The molecular weight is less than 0.0001 micron. Nanofiltration can remove solute with molecular weight of about 0.001 micron. Nanofiltration is essentially a low-pressure reverse osmosis for the treatment of post-production water purity is not particularly strict, nanofiltration is suitable for the treatment of well water and surface water. Nanofiltration is suitable for water treatment systems that do not require high desalination rates like reverse osmosis, but has a high removal capacity for hardness components, sometimes referred to as "softening membranes". Nanofiltration systems have low operating pressures and lower energy consumption. Corresponding reverse osmosis system.
How to change the filter core in the reverse osmosis equipment
After the security filter has been in use for a period of time, the treated water quality will vary due to the age of use. At this time, the filter element will be fouled. The filter element should be replaced according to the pressure difference before and after the filter. When the pressure difference is greater than 0.03MPa, it should be considered for replacement. Replacement method: Turn off the reverse osmosis system. Remove the pressure and press the button on the pressure relief valve on the device until the indication on the pressure gauge is zero. Use a professional wrench to rotate the filter bottle open.
What is the separation ability of reverse osmosis membrane technology?
Reverse osmosis equipment reverse osmosis is currently the precise liquid filtration technology of Zui. The reverse osmosis membrane has a trapping effect on inorganic molecules such as dissolved salts and organic substances with molecular weight greater than 100. On the other hand, water molecules can pass through the reverse osmosis membrane freely. Typical soluble salts have a removal rate of >95 to 99%. Operating pressures range from 7 bar (100 psi) for brackish water to 69 bar (1,000 psi) for seawater. Nanofiltration can remove impurities of 1 nm (10 angstroms) and organic matter with molecular weight greater than 200-400. The removal rate of soluble solids is 20-98%, and the removal rate of salts containing monovalent anions (such as NaCl or CaCl2). 20 to 80%, and the salt containing dianion (such as MgSO4) has a high removal rate of 90 to 98%. Ultrafiltration has a separation effect on macromolecules larger than 100 to 1,000 angstroms (0.01 to 0.1 micrometers). All soluble salts and small molecules can pass through the ultrafiltration membrane. The removable materials include colloids, proteins, microorganisms and macromolecular organics. Most ultrafiltration membranes have a molecular weight cut-off of 1,000 to 100,000. Microfiltration removes particles in the range of about 0.1 to 1 micron. In general, suspended solids and large particle colloids can be trapped while macromolecules and soluble salts are free to pass through the microfiltration membrane. Microfiltration membranes are used to remove bacteria and micro. Flocs or total suspended solids TSS, the pressure on both sides of a typical membrane is 1-3 bar.

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