How are melt-blown filters made？
MBR membrane
Reverse osmosis equipment use the problems should be paid attention to in - 【 3 m filter.
by：Lvyuan Filter
2021-01-25
Reverse osmosis equipment is one of the pure water equipment, the successful application of reverse osmosis technology in pure water equipment, drinking water in China provides a good space for development.
The use of reverse osmosis equipment need to pay attention to details.
in the first place, the water in the reverse osmosis device filter used to deal with if there is residual gas at high pressure run, will form the hammer and damage the film. Generally by two things: one, the equipment after emptying, to run, gas out of everything and booster to run fast. Should be under the pressure of 2 ~ 4 bar will do the rest of the air, gradually step up running again. Second, the joint between pretreatment equipment with high pressure pump seal is bad or leaking, Especially after micro filter and its pipeline leaking) When pretreatment water supply is not very enough, such as micro filter clogging, in the place with bad sealing part due to the vacuum will be sucked into the air. Should be clean or replace the filter, ensure the line does not leak.
second, reverse osmosis equipment shutdown method to correct. Shut down fast step-down must rinse thoroughly. Due to the membrane thick water side of inorganic salt concentration higher than that of raw water, easy fouling and membrane pollution. Also, with adding the chemical pretreatment water flushing. Because it contains chemical reagent water may cause membrane fouling during the equipment stoppage. When preparing to turn it off, you should stop adding the chemical reagent, gradual step-down to about 3 bar with pretreatment of good water washing ten minutes, until the condensed water TDS TDS with raw water is very close.
reverse osmosis equipment disinfection and maintenance must be in place. If we do not have the right to cast in use disinfectants such as chlorine, and users' insufficient recognition of prevention of microbial, easily lead to microbial pollution. Now many of the factory production of pure water microbes to exceed bid, is disinfection, due to lack of maintenance. Main show is: when leaving the factory, RO device did not use disinfectant maintenance; After installation of equipment not for the whole line and the pretreatment equipment disinfection; Don't run around the clock disinfection and maintenance measures; There is no regular disinfection on pretreatment equipment and reverse osmosis equipment; Failure or maintenance liquid concentration was not enough.
at the same time to pay attention to the protection of preventing membrane performance. New reverse osmosis membrane element usually infiltrates 1% NaHSO3 and 18% glycerol solution after stored in sealed plastic bags. Stored in plastic bags without break, 1 year or so, also won't affect the life and performance. After the plastic bag opening, should use as soon as possible, lest because of NaHSO3 in air oxidation, adverse effects on components. Reverse osmosis equipment after the commissioning, we used two methods of protective film. Equipment commissioning run for two days, about 15 to 24 hours later, with 2% formaldehyde solution and maintenance; Or run two to six hours, with 1% NaHSO3 aqueous solution for maintenance. Two methods all can get satisfactory effect, can choose according to actual situation. The first cost is relatively high, suitable for the use of idle time is long, the second method used in spare time is short.
in the first place, the water in the reverse osmosis device filter used to deal with if there is residual gas at high pressure run, will form the hammer and damage the film. Generally by two things: one, the equipment after emptying, to run, gas out of everything and booster to run fast. Should be under the pressure of 2 ~ 4 bar will do the rest of the air, gradually step up running again. Second, the joint between pretreatment equipment with high pressure pump seal is bad or leaking, Especially after micro filter and its pipeline leaking) When pretreatment water supply is not very enough, such as micro filter clogging, in the place with bad sealing part due to the vacuum will be sucked into the air. Should be clean or replace the filter, ensure the line does not leak.
second, reverse osmosis equipment shutdown method to correct. Shut down fast step-down must rinse thoroughly. Due to the membrane thick water side of inorganic salt concentration higher than that of raw water, easy fouling and membrane pollution. Also, with adding the chemical pretreatment water flushing. Because it contains chemical reagent water may cause membrane fouling during the equipment stoppage. When preparing to turn it off, you should stop adding the chemical reagent, gradual step-down to about 3 bar with pretreatment of good water washing ten minutes, until the condensed water TDS TDS with raw water is very close.
reverse osmosis equipment disinfection and maintenance must be in place. If we do not have the right to cast in use disinfectants such as chlorine, and users' insufficient recognition of prevention of microbial, easily lead to microbial pollution. Now many of the factory production of pure water microbes to exceed bid, is disinfection, due to lack of maintenance. Main show is: when leaving the factory, RO device did not use disinfectant maintenance; After installation of equipment not for the whole line and the pretreatment equipment disinfection; Don't run around the clock disinfection and maintenance measures; There is no regular disinfection on pretreatment equipment and reverse osmosis equipment; Failure or maintenance liquid concentration was not enough.
at the same time to pay attention to the protection of preventing membrane performance. New reverse osmosis membrane element usually infiltrates 1% NaHSO3 and 18% glycerol solution after stored in sealed plastic bags. Stored in plastic bags without break, 1 year or so, also won't affect the life and performance. After the plastic bag opening, should use as soon as possible, lest because of NaHSO3 in air oxidation, adverse effects on components. Reverse osmosis equipment after the commissioning, we used two methods of protective film. Equipment commissioning run for two days, about 15 to 24 hours later, with 2% formaldehyde solution and maintenance; Or run two to six hours, with 1% NaHSO3 aqueous solution for maintenance. Two methods all can get satisfactory effect, can choose according to actual situation. The first cost is relatively high, suitable for the use of idle time is long, the second method used in spare time is short.
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