Reverse osmosis equipment craft instruction and maintenance technology

A, reverse osmosis equipment process description

1. The original water tank, Optional) Reverse osmosis equipment: storage of raw water, precipitation for the large sediment particles in the water and other substances can precipitate. Buffer at the same time the original pipe water pressure instability in the impact of the water treatment system. ( Water pressure caused by too low or too high pressure sensing response) 。

　　2. The original water pump: constant pressure of water supply system, stable water supply.

　　3. More medium filter: the filter layer of filter for many times, the main purpose is to remove sediment, rust, colloid substances contained in the raw water, suspended solids and other particles in more than 20 um material, can choose manual control or automatic valve controller reverse flushing, is washed and a series of operations. The quality of the water production equipment, prolong the service life of equipment.

　　4. Activated carbon filter: system adopts nut shell activated carbon filter, activated carbon adsorption electrolyte ions not only, still can for ion exchange adsorption.

　　5. Ion softening system/dosing system: R/O device in order to dissolve the solid shape, the enrichment of emissions and the use of fresh water, to prevent damage to the film should have characteristics of the original, before entering the reverse osmosis membrane module, you should use ion softening device or put in the right amount of scale inhibitors prevent carbonate, SiO2, sulfate crystal precipitation.

　　6. Precision filter: the precision filter into the water the pesticide residue suspended solids, breed and colloidal substances such as grain materials from, make the RO system for equipment operation safer, more reliable.

　　7. Reverse osmosis system: the reverse osmosis device is with enough pressure to make the solution of the solvent ( Water is generally) Through the reverse osmosis membrane ( Or a semipermeable membrane) And separated, because of the process and the natural infiltration in the opposite direction, therefore is called reverse osmosis.

　　8. Ozone sterilizer ( Optional) : kill bacteria produced by secondary pollution thoroughly ensure the finished water health indicators.

2, reverse osmosis water purification equipment daily management is very important, and the cleaning method:

1. 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.

　　2. Reverse osmosis membrane chemical cleaning under normal operation conditions, 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 unit output descent or desalination rate, higher pressure difference, even cause unrecoverable damage to membrane, therefore, in order to restore good waterproof and desalination performance, need for chemical cleaning membrane.

　　3. 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.

ion exchanger with ion exchange method, can remove water in ion Yang, anionic, with sodium chloride ( NaCl) On behalf of the inorganic salts in water, the water quality in addition to the basic reaction of salt can be expressed in the following formula:

carbon steel lining plastic Yang bed + Yin bed +

of the mixed bed ion exchange ultrapure water treatment equipment, reverse osmosis + 1 level

of the mixed bed ion exchange ultrapure water small reverse osmosis +

two level mixed bed ion exchange resin in use after a period of time, the adsorption of impurities is close to saturation state, would be to regenerate, restore the original composition and performance. Commonly used at present, the domestic resin regeneration chemical acid-base method to restore failure of resin exchange capacity, the use of acid usually adopts the HCl or - H2SO4, allocate concentration is 3 - About 5%; Use generally adopts the NaOH, and preparation of alkali concentration for 3 - About 5%.

the pretreatment of the cation exchange resin: first with water to flush of resin, and then use 4 ~ 5% HCl and NaOH, in turn, alternating immersion in the exchange column 2 ~ 4 hours, with plenty of water between the acid and alkali leaching to water is close to neutral, repeat 2 ~ 3 times, each time 2 times the size of acid and alkali dosage of resin. Last up to 4 ~ 5% HCl solution processing applications, put acid, with water leaching to the neutral.

to ion ultrapure water treatment equipment working principle of ion exchange resin by ion exchange method, can remove water in ion Yang, anionic, with sodium chloride ( NaCl) On behalf of the inorganic salts in water, water desalination, the basic reaction can be expressed in the following formula:

1, cation exchange resin: R - H+Na+ R— Na + H +

2, anion exchange resin: R - 哦+ Cl - R— Cl +哦-

Yang, anion exchange resin the overall reaction can be written as: RH + ROH + NaCl - — RNa+RCL+H2O