What is the process flow of reverse osmosis equipment?
Reverse osmosis is a membrane separation technology that uses pressure as a driving force through the function of a selective osmosis (semi-permeable) membrane. When the pressure applied in the system is greater than the osmotic pressure of the aqueous solution, water molecules continuously permeate into the membrane. After flowing into the intermediate tube through the product flow channel, impurities such as ions, organics, bacteria, viruses, etc. flow out from one end of the water, which is trapped at the inlet side of the membrane, and then flows out at the outlet end of the concentrated water, so as to achieve the purpose of separation and purification.
Process flow of reverse osmosis equipment
*Activated carbon filter
The system uses a nutshell activated carbon filter, which can not only adsorb electrolyte ions, but also perform ion exchange adsorption. The activated carbon adsorption can also reduce the oxygen consumption (COD) of potassium permanganate from 15mg/L (O2) to 2-7mg/L (O2). Play a catalytic role, remove pigments, odors, a large number of biochemical organic matter in water, reduce the residual chlorine value of water and pesticide pollutants, and remove trihalide (THM) and other pollutants in water. At the same time, the equipment has a self-maintenance system, and the operating cost is very low.
*Ion softening system/dosing system
In order to concentrate the discharge of dissolved solids and the utilization of fresh water in the R/O device, in order to prevent the concentration of CaCO3, MgCO3, MgSO4, CaSO4, BaSO4, SrSO4, SiSO4 from appearing at the concentrated water end, especially the concentrated water side of a membrane module after the RO device If the product is larger than its equilibrium solubility constant, it will crystallize out, which will damage the proper characteristics of the original membrane. Before entering the reverse osmosis membrane module, an ion softening device should be used or an appropriate amount of scale inhibitor should be used to prevent the precipitation of carbonate, SiO2 and sulfate crystals. .
*raw water tank
Store raw water for precipitating large sediment particles and other precipitable substances in water. At the same time, the impact of unstable water pressure in the raw water pipe on the water treatment system is buffered. (such as the response of the pressure sensor caused by the water pressure being too low or too high).
*Raw water pump
Constant system water supply pressure, stable water supply.
*Multimedia filter
The filter with multiple filter layers is mainly used to remove sediment, rust, colloidal substances, suspended solids and other substances with particles above 20um contained in the raw water. Manual valve control or automatic controller can be used for backwashing, positive A series of operations such as flushing. Ensure the water quality of the equipment and prolong the service life of the equipment.
*reverse osmosis system
The reverse osmosis equipment uses enough pressure to separate the solvent (usually water) in the solution through the reverse osmosis membrane (or semi-permeable membrane), because this process is opposite to the direction of natural osmosis, so it is called reverse osmosis. The reverse osmosis method can adapt to all kinds of raw water with salt content, especially in water treatment projects with high salt content, and can obtain good technical and economic benefits. The desalination rate of the reverse osmosis method is improved, the recovery rate is high, the operation is stable, the floor space is small, and the operation is simple. The reverse osmosis equipment also removes most of the bacteria, colloids and large molecular weight organics while removing the salt.
*Ozone sterilizer/ultraviolet sterilizer (optional)
Kill the bacteria produced by the secondary pollution to ensure the sanitary index of the finished water.
*filter
The reverse osmosis equipment uses a filter to remove the suspended solids, non-curved particles and colloids remaining in the influent water, so that the subsequent equipment such as the RO system can operate more reliably. The filter element is a 5um meltblown filter element, the purpose is to remove the impurities larger than 5um missed by the upper filter unit. Prevent it from entering the reverse osmosis unit and damage the surface of the membrane, thereby damaging the desalination performance of the membrane.
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