Reverse osmosis is a kind of with the aid of choice through (
Sex film skill to pressure as the driving force of membrane separation technology, when system and the pressure is greater than in the aqueous solution of osmotic pressure, the water molecules through the membrane unceasingly, after producing water flows into the central tube, and then out in the end the impurities in the water, such as ion, organic matters, such as bacteria, viruses, interception on the inlet side of the membrane, and then in the thick water outflow water end, so as to achieve separation and purification.
Application of membrane separation technology, reverse osmosis equipment can effectively remove the charged ions in the water, inorganic substance, colloid particles, bacteria and organic matter, etc.
High pure water preparation, the best equipment in the desalination of brackish water and wastewater treatment process.
Widely used in electronics, medicine, food, textile, chemical, electricity and other fields.
Composition: reverse osmosis equipment system generally includes pretreatment system, reverse osmosis devices, post-processing system, cleaning system and electric control system, etc.
Pretreatment system generally includes the original water pump, dosing system, quartz sand filter, activated carbon filter, precision filter, etc.
Its main function is to reduce the raw water pollution index and residual chlorine and other impurities, to achieve the reverse osmosis water requirements.
The equipment configuration of pretreatment system should be based on the raw water of the specific circumstances.
Reverse osmosis unit includes multistage high-pressure pump, reverse osmosis membrane element, membrane shell (
The pressure vessel)
, bracket, etc.
Its main function is to remove the impurities in the water, the water meets the requirement.
Post-processing system is under the condition of the reverse osmosis can not meet the requirement of the water, increase the configuration.
Mainly includes the Yin, Yang bed, mixed bed, sterilization, ultrafiltration, EDI and other one or more of these equipment.
Post-processing system can increase the reverse osmosis water quality better, make it meet the requirements.
Cleaning system mainly include cleaning tank, cleaning pump, the precision of filter.
When the reverse osmosis system cannot meet the requirements of the pollution of water index, need cleaning restore on reverse osmosis effect.
Electrical control system is used to control the normal operation of the reverse osmosis system.
Including the instrument panel, control panel, all kinds of electrical protection, electrical control cabinet, etc.
Reverse osmosis equipment cleaning method: zhangjiagang shun machinery to provide quality reverse osmosis equipment, reverse osmosis technology because of the special superiority and increasingly extensive application.
Reverse osmosis water purification equipment cleaning problems could make many technical strength is not strong user loss, so to reverse osmosis equipment management, can avoid the serious problem.
Low pressure flushing reverse osmosis equipment regularly for reverse osmosis equipment and large flow, low pressure, low ph value of flushing for stripping adhesion on the membrane surface dirt, maintain membrane performance, or when the SDI jump more than 5 reverse osmosis equipment into the water.
More than 5 should be low pressure flush, again after being qualified SDI value to boot.
Reverse osmosis equipment shutdown protection due to fluctuations in production, the reverse osmosis device inevitably to often shutdown, short-term or long-term outage protection measures must be taken, improper handling can lead to membrane performance degradation and recovery.
Short-term save 15 d the following applies to shut down the system, can be used for every 1 ~ 3 d low pressure washing method to protect the reverse osmosis device.
Practice found that the water temperature is 20 ℃ above, the water in the reverse osmosis device to store 3 d will stink metamorphism, there is a lot of bacteria breeding.
Therefore, it is suggested that water temperature above 20 ℃, once every 2 d or 1 d low pressure flush, when the water temperature is less than 20 ℃, can once every 3 d low pressure flush, after each wash need to shut down water purification equipment, reverse osmosis devices on all import and export valves.
Disable protection for a long time more than 15 d applies to shut down the system, then must use protect fluid (
Filling the water purification equipment, reverse osmosis devices, for their own protection.
Common bactericide formula (
10 for formaldehyde (
The mass fraction)
20 mg/L, thiazole moiety ketone, sodium bisulfite 1 (
The mass fraction)
Reverse osmosis membrane chemical cleaning under normal operation conditions, beverage machinery
in the reverse osmosis membrane may also be inorganic scale, colloid, microorganism, metal oxides, such as pollution, these substances deposited on the membrane surface to cause water purification equipment, reverse osmosis device output descent or desalination rate, differential pressure increases, and even cause unrecoverable damage to membrane, therefore, in order to restore good waterproof and desalination performance, need for chemical cleaning membrane.
Clean normally 3 ~ 12 months, if have to wash once a month, suggesting that should improve the pretreatment system, adjust the operating parameters.
If need to wash a 1 ~ 3 months, you will need to improve equipment operation level, more difficult to judge whether to need to improve the pretreatment system.
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