When reverse osmosis element membrane is seriously polluted, the drug cleaning is often referred to as organic chemical cleaning. The actual effect of cleaning will be better. Drug cleaning can remove pollutants and dirt in ro system membrane more quickly, thereby repairing the original characteristics of the membrane.

1. Reasons for drug wash of reverse osmosis element membrane

If a reverse osmosis membrane is used, the reverse osmosis membrane should be cleaned when the water output is not ideal. In addition, if the standard water output of the reverse osmosis membrane is reduced by 10-15%, the standard water body will be reduced by 10-15%, or the loss between water supply and drainage and concentrated water will increase by 10-15%, indicating that cleaning is needed.
A very important factor of reverse osmosis element membrane drug cleaning is to maximize the actual effect of reverse osmosis membrane cleaning. Drug cleaning consists of various organic chemical cleaning liquids. The main process is low pH cleaning to remove mineral contaminants, and then high pH Cleaning to remove organic compounds.

In some cases, first perform high pH cleaning to remove oil and organic chemical contaminants, and then perform low pH cleaning. Some cleaning water solutions are added with cleaning solutions, which are helpful to eliminate more serious microorganisms and organic chemical residues. Other experimental reagents (such as EDTA (ethylenediaminetetraacetic acid) antioxidants, colloidal solutions, organic compounds, etc.) can be used to remove microbial strains and Potassium thiocyanate scale.

2.The method of drug washing of reverse osmosis element membrane

(1). Clean ro system membrane. 

Wash with reverse osmosis water or ion exchange water for a few minutes.

(2). Set up medicine washing and cleaning agent. 

Make sure that the cleaning agent is completely melted.

(3). Loop.
Replace the water in reverse osmosis element membrane with a low flow rate, and then drain and circulate some cleaning agent. If the pollution is serious, choosing a larger total flow circulation will cause excessive pressure difference and damage membrane for ro water purifier.

(4). Soaking and recycling.

Slowly close the gate valve at the inlet, and terminate the circulation pump when the circulation speed approaches zero. In order to better prevent the liquid from escaping from the high-pressure container, the relevant valve can be opened during the entire infiltration process. The soaking time depends on the contamination level. Usually 1 to 12 hours. After soaking, open the appropriate valve and circulate.

(5). Flashing.

 Use reverse osmosis water or ion exchange to clean membrane for ro water purifier and the cleaner chemicals.