How does reverse osmosis extend the life of the device?

The quality of pre-treatment and pre-treatment of reverse osmosis equipment is the key to the stable operation of reverse osmosis equipment.
when reverse osmosis equipment in water using groundwater, the use of quartz sand and activated carbon pretreatment is not a problem, when the use of surface water is different.
1, reverse osmosis equipment pretreatment agents and treatment of the drugs used, including coagulants, coagulants, oxidants, reducing agents, especially coagulants and scale inhibitors, the selection of these agents, dosing and even drug dispensing methods will have a great impact on the operation of reverse osmosis.
usually, we will pay attention to detect the iron content of the incoming water, in fact, the high level of aluminum in the water will also cause the reverse osmosis membrane pollution.
aluminum film pollution is caused by aluminum hydroxide precipitation, aluminum hydroxide sediment usually in colloidal form, is a bi-hydroxid, in the pH range of 6.5-6.7 has a very small solubility, if the aluminum condensation process is carried out at a high or too low pH, aluminum ions will enter the reverse osmosis device to cause inversion Permeable membrane pollution, so for the use of aluminum salt as a condensant pretreatment system, its pH control at 6.5-6.7, so that the solubility of aluminum reached a relatively small, pay attention to the timely adjustment of the amount of injection according to water quality, if possible to regularly test the pre-treated water aluminum content, and control at 0.05 mg/L below.
in order to prevent the fouling of the thick water side, we usually add scale inhibitors, the current scale inhibitor on some organic acids, organic phosphate substances compounded, to achieve the purpose of scale resistance, dispersion.
if not selected or controlled properly, these organic matter will stain the reverse osmosis membrane elements, and it can also become a breeding ground for bacterial microorganisms, and the operation of reverse osmosis to bring greater harm.
2, the temperature may be known to know that the temperature on the flux of the reverse osmosis membrane components have a great impact, so in the calculation of water production of the temperature of the nuclear test can be compared with each other.
so in winter in the low water temperature of the pre-treatment system of reverse osmosis will be designed heating equipment, so that can effectively ensure that the winter reverse osmosis equipment can also achieve design force.
in fact, the membrane element siO? precipitation, but also with the reverse osmosis device water intake temperature has a close relationship, the concentration of silicon dioxide in the thick water, 25 degrees C can not exceed 100 mg / l, 5 degrees C can not exceed 25 mg / l.
, when there is no heating equipment in the pretreatment system, in winter should pay great attention to the contamination of the membrane element seamount of silica sediment, strictly control the content of silicon dioxide in concentrated water, the value of which can not exceed the solubility at that temperature.
reverse osmosis equipment operation management 1, reverse osmosis equipment regular inspection, timely replacement of security filter filter filter, to prevent the filter element due to installation or quality problemleakage caused by particle pollution of the reverse osmosis membrane.
when the security filter import pressure difference is greater than 0.15MPa, the filter element should be replaced.
should generally be checked once a month, the filter should not be used for more than 6 months, the operation should also often check the security filter is enough gas, can not let air into.
2, reverse osmosis membrane elements of the inspection (1) generally every six months (if necessary can shorten the time), to each set of reverse osmosis of one, two film components to check.
(2) replace the pressure vessel end cover (using special tools and operated by skilled technicians).
(3) check the water into the water section for mechanical impurities, metal oxide deposits, whether there are bacteria microbial breeding, membrane element color changes, check the membrane for fouling.
(4) if need to also draw out the reverse osmosis membrane elements for detailed inspection, and then pumped into the water end membrane elements, must not be directly pumped, according to the direction of water flow it is pushed out of the pressure vessel, installation is the same.
(5) make a detailed record after each check for comparison.
3, the meters are regularly checked to ensure that the meters are accurate and reliable.
4, regularly run data analysis statistics on reverse osmosis equipment.
operating pressure, recovery rate (or strong water emissions), SDI (pollution index), pH, residual chlorine and temperature of intake are the main operating control parameters of reverse osmosis devices;
must be strictly adhered to in operation management and must not change operating conditions at will.
in particular to prevent the recovery rate to increase water production, resulting in reverse osmosis membrane surface fouling, to prevent the SDI value of the case continue to run, resulting in the backosion membrane blockage, to prevent the allowing large pressure difference above the continued work caused by the damaging damage of the membrane elements.
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