First of all, simply understand the laboratory ultra- pure water machine , tap water through the precision filter and activated carbon filter for pretreatment, filter the sediment and other particles and adsorption of odor, so that the tap water becomes cleaner, and then through the reverse osmosis device for water purification and desalination, The purified water is stored in the storage tank, and the water quality can reach the national three-level water standard, and the wastewater produced by the reverse osmosis device (also called “concentrated waterâ€) is discharged. Reverse osmosis pure water is subjected to deep desalting treatment through a purification column to obtain first-grade water or ultra-pure water. Finally, if the user has special requirements, ultraviolet sterilizing or microfiltration, ultrafiltration, etc. are added after the ultrapure water to remove residual water. Bacteria, particles, heat sources, etc.
The precision filter element, activated carbon filter element, reverse osmosis membrane and purification column are all materials with relative life. The precision filter element and the activated carbon filter element are actually the protection of the reverse osmosis membrane. If they fail, the load of the reverse osmosis membrane is aggravated and the life is reduced. Short, if you continue to boot, the quality of the pure water produced will decrease, which will increase the burden on the purification column, and the life of the purification column will be shortened. The end result is an increase in the cost of using ultrapure water machines.
Therefore, in the use of laboratory ultra-pure water machines, there are the following aspects that need attention.
1. Reverse osmosis membrane <br> The reverse osmosis membrane is an important part of ultrapure water machine. Its pore size is very small, so there are often microscopic substances such as bacteria deposited on its surface during use. There is a backwash function designed to wash away contaminants. The water consumption can be washed 3-5 times within 10 liters/day. If it exceeds 10 liters, it should be washed several times. If it is not used for a long time (such as more than 1 month), it needs to be taken out and immersed in the disinfectant to avoid the breeding of bacteria. However, the process is troublesome. It is recommended that even if it is not used, it is often turned on with a small amount of water to allow the inside of the machine. The water forms a circulation, and the deposition time of the dead water is minimized. The life of the reverse osmosis membrane is 1-2 years, which is mainly determined by the amount of water used. Therefore, it is necessary to select the matching specifications when selecting.
2.Precision filter element <br> Precision filter element, also known as filter element, split-line filter element and PP melt-blown filter element, mainly filter large particles such as sediment in raw water, and its filtration precision is 5 microns, 1 micron and so The new filter element is white. If the surface is long, the surface will be silted, etc., and it will appear brown. This means that the filter element can not be used. After washing the surface sludge with tap water, it can barely continue to use for 1-2 weeks, but it cannot be used for a long time. . The filter element is placed inside the filter bottle. Some filter bottles are transparent. The color change of the filter element can be visually observed. Some filter bottles are opaque and need to be unscrewed to observe the change of the filter element. From the empirical data statistics, the life of the precision filter element is generally from March to June. If there is more sediment in the raw water, the life is shorter, and the sediment and other particles are less, the life is slightly longer.
3. Purification column <br> The purification column is sometimes called ultra-purification column according to the customer's water quality requirement. Its function is to deeply desalt the reverse osmosis pure water and finally reach the level of first-grade water or ultra-pure water. The principle is ion exchange. The lifetime of the purification column is represented by the resistivity online. Below a certain resistance means that the purification column has expired and is relatively intuitive. In addition to the amount of water used, in addition to the amount of water used, it is particularly important that the amount of ion exchange resin and the quality of the ion exchange resin in each manufacturer's design are.
4. Activated carbon filter element The activated carbon filter element mainly removes odor and organic matter in water through adsorption. There is residual chlorine in the tap water, which has a great oxidation effect on the reverse osmosis membrane, so it must be removed by activated carbon. There is no intuitive change in the surface of the activated carbon filter. According to experience, it is generally saturated in about 6-8 months and needs to be replaced.
5. Ultra-pure water machine with water and tap water as water source generally has two water outlets, namely three-stage water and first-grade water. The water that is reverse osmosis is three-stage water, which is stored in the water tank, and the first water It is ready to use, not stored. The tertiary water does not pass through the purification column, and the first stage water passes through the purification column, and the cost of the first stage water is higher than that of the third stage water. Therefore, in daily application, water should be taken according to the water quality requirements. When using three-stage water, try not to use the first-grade water to avoid the rising cost of use.
The precision filter element, activated carbon filter element, reverse osmosis membrane and purification column are all materials with relative life. The precision filter element and the activated carbon filter element are actually the protection of the reverse osmosis membrane. If they fail, the load of the reverse osmosis membrane is aggravated and the life is reduced. Short, if you continue to boot, the quality of the pure water produced will decrease, which will increase the burden on the purification column, and the life of the purification column will be shortened. The end result is an increase in the cost of using ultrapure water machines.
Therefore, in the use of laboratory ultra-pure water machines, there are the following aspects that need attention.
1. Reverse osmosis membrane <br> The reverse osmosis membrane is an important part of ultrapure water machine. Its pore size is very small, so there are often microscopic substances such as bacteria deposited on its surface during use. There is a backwash function designed to wash away contaminants. The water consumption can be washed 3-5 times within 10 liters/day. If it exceeds 10 liters, it should be washed several times. If it is not used for a long time (such as more than 1 month), it needs to be taken out and immersed in the disinfectant to avoid the breeding of bacteria. However, the process is troublesome. It is recommended that even if it is not used, it is often turned on with a small amount of water to allow the inside of the machine. The water forms a circulation, and the deposition time of the dead water is minimized. The life of the reverse osmosis membrane is 1-2 years, which is mainly determined by the amount of water used. Therefore, it is necessary to select the matching specifications when selecting.
2.Precision filter element <br> Precision filter element, also known as filter element, split-line filter element and PP melt-blown filter element, mainly filter large particles such as sediment in raw water, and its filtration precision is 5 microns, 1 micron and so The new filter element is white. If the surface is long, the surface will be silted, etc., and it will appear brown. This means that the filter element can not be used. After washing the surface sludge with tap water, it can barely continue to use for 1-2 weeks, but it cannot be used for a long time. . The filter element is placed inside the filter bottle. Some filter bottles are transparent. The color change of the filter element can be visually observed. Some filter bottles are opaque and need to be unscrewed to observe the change of the filter element. From the empirical data statistics, the life of the precision filter element is generally from March to June. If there is more sediment in the raw water, the life is shorter, and the sediment and other particles are less, the life is slightly longer.
3. Purification column <br> The purification column is sometimes called ultra-purification column according to the customer's water quality requirement. Its function is to deeply desalt the reverse osmosis pure water and finally reach the level of first-grade water or ultra-pure water. The principle is ion exchange. The lifetime of the purification column is represented by the resistivity online. Below a certain resistance means that the purification column has expired and is relatively intuitive. In addition to the amount of water used, in addition to the amount of water used, it is particularly important that the amount of ion exchange resin and the quality of the ion exchange resin in each manufacturer's design are.
4. Activated carbon filter element The activated carbon filter element mainly removes odor and organic matter in water through adsorption. There is residual chlorine in the tap water, which has a great oxidation effect on the reverse osmosis membrane, so it must be removed by activated carbon. There is no intuitive change in the surface of the activated carbon filter. According to experience, it is generally saturated in about 6-8 months and needs to be replaced.
5. Ultra-pure water machine with water and tap water as water source generally has two water outlets, namely three-stage water and first-grade water. The water that is reverse osmosis is three-stage water, which is stored in the water tank, and the first water It is ready to use, not stored. The tertiary water does not pass through the purification column, and the first stage water passes through the purification column, and the cost of the first stage water is higher than that of the third stage water. Therefore, in daily application, water should be taken according to the water quality requirements. When using three-stage water, try not to use the first-grade water to avoid the rising cost of use.
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