At present, many industries have to use water treatment equipment, such as pharmaceutical, medical, laboratory, etc., and, many industries have certain explicit requirements for water. In order to water to meet the needs of production, good water treatment equipment is essential. However, even if the equipment is good, the accessories also have a replacement cycle, the following to come with Susan to look at the water treatment equipment supplies and accessories replacement cycle in detail!
Conventional water treatment equipment accessories and consumables are quartz sand, activated carbon, softening resin, PP filter and reverse osmosis membrane and so on.
First, quartz sand
Quartz sand is mainly filtering and screening role, can filter out large particles of objects.
Normally speaking, quartz sand replacement cycle for 8-24 months, depending on the water quality to determine, if the water quality is not very good, then the shorter the life of the quartz sand.
The main basis for replacement: reference to the multi-media filter in and out of the water pressure difference, the system can not be reduced to the normal range of pressure difference after repeated cleaning, it is recommended to replace; produced water quality SDI value > 5, the system can not be reduced to the normal range of SDI value after repeated cleaning, it is recommended to replace; the quartz sand use period has been more than the manufacturer's life, it is recommended to replace.
Activated carbon
Activated carbon is mainly used as adsorption, adsorption of organic matter, iron, oxides, residual chlorine. Protect RO membrane from oxidation.
Replacement cycle: activated carbon replacement cycle of 8-24 months, mainly based on raw water quality.
The main basis for replacement: with reference to the activated carbon filter in and out of the water pressure difference, the system after repeated cleaning of the pressure difference can not be reduced to the normal range, it is recommended to replace; activated carbon catalytic reaction to reduce the carbon content of the produced water resulting in residual chlorine value of > 0.05mg / L, it is recommended that the replacement; activated carbon period of time has been more than the manufacturer to provide the use of the life of the recommendation to replace.
Softening resin
Softening resin is mainly to remove calcium ions and magnesium ions in the water, reduce the hardness of water, to prevent these substances damage to the reverse osmosis membrane.
Resin replacement cycle of 8-24 months, mainly according to the raw water quality.
The main basis for replacement: with reference to the softener's inlet and outlet water pressure difference, the system can not be reduced to the normal range of pressure difference after several cleaning, it is recommended to replace; resin poisoning, oxidation of produced water hardness > 3mg / L, the system regeneration of produced water hardness can not be reduced to the normal range of hardness, it is recommended that the replacement; resin period of time has been more than the manufacturer to provide the use of the age of the replacement is recommended.
Fourth, precision filter element (PP filter)
Precision filter element using PP cotton column filter element, to prevent ≥ 5μm particles into the reverse osmosis membrane, resulting in RO membrane easily fouled and scratched.
Cartridge replacement cycle of 1-3 months, mainly according to the original water quality. The main basis for replacement 1, with reference to the filter's inlet and outlet water pressure difference, it is recommended to replace. 2, the filter cartridge use period to reach the manufacturer's recommended replacement cycle time or internal cycle maintenance program replacement time.
Fifth, reverse osmosis membrane (RO membrane)
Reverse osmosis membrane is generally made of polymer materials, membrane pore size is small, the diameter of the surface microporous generally between 0.5 ~ 10nm, reverse osmosis system with the help of the reverse osmosis membrane selective permeability (semi-permeable) membrane function, pressure difference as the driving force of the through the reverse osmosis membrane, through the production of water flow into the core tube, and then outflow at one end of the convergence of the production of water pipeline. Impurities in the influent water, such as ions, organic matter, bacteria, viruses, etc. are retained in the influent side of the membrane, and then out in the concentrated water outlet, so as to achieve the purpose of separation and purification, and get a lower conductivity of the produced water quality.
The replacement cycle of reverse osmosis membrane is 2-4 years, depending on the water quality.
The main basis for replacement: reverse osmosis membrane performance decline, after chemical cleaning performance can not be to the normal range, it is recommended to replace; reverse osmosis membrane irreparable damage affects system operation, it is recommended to replace; reverse osmosis membrane use period has exceeded the manufacturer's service life, it is recommended to replace.
VI. Consumables replacement cycle table (reference)
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