1. Operation of reverse osmosis purified water equipment

The operation of reverse osmosis purified water equipment is mainly divided into several parts: normal operation, operation monitoring, automatic flushing, and so on.

The main contents of the automatic operation of reverse osmosis purified water equipment include: automatic control of ultra-high pressure and ultra-low pressure; automatic shutdown when no water and full water; automatic discharge of concentrated water; online automatic detection of water quality, automatic discharge alarm for unqualified water, and timing indication of washing , fault prompts, etc.

When the reverse osmosis purified water equipment is running, turn on the power switch, start the operation button, adjust the high-pressure pump regulating valve (the opening of the valve can not be adjusted after the first adjustment), the concentrated water valve, the fresh water valve, and the reverse osmosis valve to issue work instructions. The high-pressure pump is automatically turned on, the corresponding working valve is turned on, and the instrument on the machine starts to enter the working state. Check whether there is any abnormality at the working point (the fault indicator light is not on when it is normal). If there is no abnormality, the reverse osmosis will be put into normal operation.

2. Maintenance of reverse osmosis purified water equipment

There are three main types of failure phenomena of reverse osmosis equipment: decrease in water permeability, increase in salt permeability (decreased desalination rate) and increase in pressure drop. However, there are many reasons for these failures, and we should try to find out the problem from these failure phenomena. In order to implement the countermeasures such as maintenance and maintenance as soon as possible.

The most common problems in reverse osmosis equipment are a decrease in the salt rejection rate and a decrease in the product water volume. If one or both of them are slowly decreasing, it may be a common phenomenon of fouling or scale generation, and the problem can be solved by proper cleaning, Sudden or rapid performance degradation can indicate a problem or improper operation of the processing system. If a problem occurs, it needs to be solved as soon as possible, and the delay will cause the reverse osmosis membrane to fail to restore its original performance.

A prerequisite for timely detection of problems in the first place is the keeping of appropriate records. When it is found that the desalination rate and water production of the system have decreased, the meter should be calibrated first to avoid misjudgment due to the meter. These instruments include conductivity meters, flow meters, pressure gauges, temperature gauges, and more.

Second, the recorded operational data is "normalized".

Finally, changes in temperature, influent TDS, recovery rate, service life and water flux will cause changes in salt rejection and water production. The normalized water production and salt rejection are calculated and compared with the initial operating data to confirm whether the system is faulty.

During the long-term operation of the reverse osmosis purified water equipment, the surface of the reverse osmosis membrane will gradually accumulate retained colloids, microorganisms and other dirt. These substances are deposited on the surface of the membrane, which will cause the performance of the reverse osmosis system to decline. Clean or replace.