Brackish water desalination equipment dedicated membrane cleaning overview in normal operation after a period of time, brackish water desalination equipment dedicated membrane are possible suspension or hard dissolved salt to the water pollution, the pollution is one of the more common in the precipitation of calcium carbonate, calcium sulfate precipitation, metal (
Iron, manganese, copper, nickel, aluminum, etc. )
Silicon oxide precipitation, sediment, the mixture of inorganic or organic deposition, NOM natural organic material, such as synthetic organic matter, microorganism pollution.
This paper introduces the brackish water desalination equipment dedicated membrane cleaning overview.
Nature and the pollution rate depends on various factors, such as water supply water quality and system recovery.
Pollution is usually gradual development, if not control as soon as possible, pollution will be in a relatively short period of time the damage of membrane element.
When contaminated membrane element, or before long downtime, or as a regular routine maintenance, suggest to clean the membrane element.
When the reverse osmosis
The following symptoms, the need for chemical cleaning and physical flush: under normal water supply pressure, water rate 10 ~ 15% lower than normal;
In order to maintain the normal water rate, the temperature correction after 10 to 15% increase in feed water pressure;
Produced water quality lower 10-15%, through salt rate 10 ~ 15% increase;
Feed pressure increased 10-15%.
System pressure difference between paragraphs.
Stable operation parameters mainly refers to the water rate, water production back pressure, recovery rate, temperature and TDS.
If these operation parameters fluctuated, it is recommended that check for pollution occurs, or the key operation parameters are changed under the premise of practical operation of reverse osmosis is normal.
Timing monitoring system for overall performance is whether confirm the brackish water desalination equipment dedicated membrane pollution has occurred the basic method.
Pollution on the influence of brackish water desalination equipment dedicated membrane is gradual, and influence degree depends on the nature of the pollution.
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