Reverse osmosis equipment is mainly used in various membrane water treatment processes. Simple equipment can be directly called reverse osmosis equipment, and complex equipment is called reverse osmosis system. Industry report: When using reverse osmosis equipment, it will inevitably lead to scaling, which is not only difficult to clean, but also affects the water production effect. So, what is the cause of the fouling phenomenon of reverse osmosis equipment? How to solve it?
According to the industry, when the raw water passes through the reverse osmosis membrane, the insoluble salts will stay on the surface of the membrane and precipitate as a solid. Specifically, during the operation of the reverse osmosis equipment, the pressure generated during the low pressure washing process will produce fresh water, and the concentration of the water on both sides will naturally deepen, and the deepening will cause the concentration of the salt to deepen, in the salt. Contains a large amount of precipitable material, which will cause scaling after a long time.
Therefore, as long as the poorly soluble salts do not exceed the saturation limit, the occurrence of fouling can be effectively prevented. Among them, in terms of design, in order to better replace the concentrated water, it is possible to ensure that the salt content of the concentrated water is low.
The main insoluble salts in natural water sources are: calcium carbonate, barium sulfate, calcium sulfate, calcium fluoride, barium sulfate and silica. Experts caution that in the design of reverse osmosis systems, special attention should be paid to barium sulphate and barium sulphate. An increase in the concentration of calcium sulfate and a decrease in the temperature of the water also cause a decrease in the solubility of barium sulfate.
In addition, some inorganic substances with low content in natural waters are brought into the feed water by human factors, such as dosing. For example, inorganic salts such as phosphate, iron and aluminum tend to have low solubility products and are highly prone to occur. Fouling, so when the system is dosed with chemicals (such as flocculants, coagulants, scale inhibitors, acids and bases, etc.), the effects of these artificially introduced ionic components must be considered.
It is understood that sometimes there are cases where different agents that are added to each other cause the precipitation of insoluble substances, which in turn contaminate the membrane elements. The industry recommends that if you encounter this kind of situation, you should pay attention to the ingredients of these medicines when you add a variety of medicines, and conditionally, you can confirm their compatibility through experiments.
In general, in order to better protect the reverse osmosis equipment and prolong the service life of the reverse osmosis equipment, the raw water can be pretreated in advance, and the large particle impurities can be filtered by activated carbon or quartz sand filtration, and then softened by the ion exchange resin. Descaling can be avoided by removing calcium and magnesium ions from the water.
At the same time, the technical staff in the industry also said that in order to prevent fouling, the filter speed of the filter should not be too fast or too slow in terms of filtration speed. The backwashing process must have a certain time and flow rate, and the backwashing effect is good. The operation of the filter can be good; when the water flow is running, the uniformity of the water flow should be ensured, only the water flow is uniform, and the filtration effect can be good; in the filter material, the particle size and uniformity of the filter material need to be considered. In short, the rational use of membrane treatment of reverse osmosis equipment can further effectively prevent the occurrence of fouling in reverse osmosis equipment.
- to extend a pipe or tube
In order to choose the best suited fitting in your Centralized Lubrication System, a few basic criteria must be taken into account: Operating pressure and temperature, dimensions, and option of exchanging.
According to the industry, when the raw water passes through the reverse osmosis membrane, the insoluble salts will stay on the surface of the membrane and precipitate as a solid. Specifically, during the operation of the reverse osmosis equipment, the pressure generated during the low pressure washing process will produce fresh water, and the concentration of the water on both sides will naturally deepen, and the deepening will cause the concentration of the salt to deepen, in the salt. Contains a large amount of precipitable material, which will cause scaling after a long time.
Therefore, as long as the poorly soluble salts do not exceed the saturation limit, the occurrence of fouling can be effectively prevented. Among them, in terms of design, in order to better replace the concentrated water, it is possible to ensure that the salt content of the concentrated water is low.
The main insoluble salts in natural water sources are: calcium carbonate, barium sulfate, calcium sulfate, calcium fluoride, barium sulfate and silica. Experts caution that in the design of reverse osmosis systems, special attention should be paid to barium sulphate and barium sulphate. An increase in the concentration of calcium sulfate and a decrease in the temperature of the water also cause a decrease in the solubility of barium sulfate.
In addition, some inorganic substances with low content in natural waters are brought into the feed water by human factors, such as dosing. For example, inorganic salts such as phosphate, iron and aluminum tend to have low solubility products and are highly prone to occur. Fouling, so when the system is dosed with chemicals (such as flocculants, coagulants, scale inhibitors, acids and bases, etc.), the effects of these artificially introduced ionic components must be considered.
It is understood that sometimes there are cases where different agents that are added to each other cause the precipitation of insoluble substances, which in turn contaminate the membrane elements. The industry recommends that if you encounter this kind of situation, you should pay attention to the ingredients of these medicines when you add a variety of medicines, and conditionally, you can confirm their compatibility through experiments.
In general, in order to better protect the reverse osmosis equipment and prolong the service life of the reverse osmosis equipment, the raw water can be pretreated in advance, and the large particle impurities can be filtered by activated carbon or quartz sand filtration, and then softened by the ion exchange resin. Descaling can be avoided by removing calcium and magnesium ions from the water.
At the same time, the technical staff in the industry also said that in order to prevent fouling, the filter speed of the filter should not be too fast or too slow in terms of filtration speed. The backwashing process must have a certain time and flow rate, and the backwashing effect is good. The operation of the filter can be good; when the water flow is running, the uniformity of the water flow should be ensured, only the water flow is uniform, and the filtration effect can be good; in the filter material, the particle size and uniformity of the filter material need to be considered. In short, the rational use of membrane treatment of reverse osmosis equipment can further effectively prevent the occurrence of fouling in reverse osmosis equipment.
Quick Push-in Type Fittings from Cixi Air-Fluid are designed for high pressure ,withstanding up to max pressure 500 bar ( reinforced collar version) ,after testing in U.S.A .
Cixi Air-Fluid push-in fittings,Straight Male Connector ,Male Elbow ,Push-in Type ,Rotatable , Male Elbow Fittings 90° Fixed , for centralized lubrication systems are repeated usable and made in brass.
This push-in fittings do have a different application field in centralized lubrication systems like:
- to extend and to connect a pipe or tube with the same or different diameters and/or materials.- to extend a pipe or tube
In order to choose the best suited fitting in your Centralized Lubrication System, a few basic criteria must be taken into account: Operating pressure and temperature, dimensions, and option of exchanging.
Lubrication Systems Fittings, Centralized Lubrication System, Lubrication Systems Fittings Adapters
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