A chemical wash was carried out for a desalination plant (RO), where there was a blockage of the emitters due to lack of interest in following the injector injection pump for two weeks from The operation of the processing unit was observed. White precipitation was observed on the REJECT flow meter, where the RO yield was reduced from 48 L / hr to 15 L / hr The flow of REJECT increased from 25 L / hr to 45 L / hr, causing problems in production, so that production of the production tank is not sufficient,In order to ascertain the cause of the obstruction, and the weakness of the potential to bring a company to the washing process,
1 - tink for chemical washing 2 - pump for chemical washing 3 - links to the lines entering the RO and out of them 4 - acid citric acid (lemon salt) on Granules form The method of installation was:
1. Connect the pump to the chemical washing line, and connect the pump to the line inside the RO, but observe the connection of the line inside the RO To first enter a cotton filter to hold any impurities on the RO.
2. Connect the output line and the REJECT line with the chemical washing machine
3. Dissolve citric acid with water in the chemical washing line, taking into consideration that the washing water is chlorine-free and preferably water produced by the RO
4. We take the output lines and the REJECT from the chemical washing line and place it in the DRAIN.
5 - Operate the recycling pump so that the detergent does not return to the chemical laundry to ensure that the water out of the same is the water of washing, and this is evidence of access
For all the preparations, we can make sure to measure the pH to be less than 4.
6 - If we notice that the water coming out of the color close to redness or yellowing, we keep the process of washing without rotation so that we continue to wash until the color of water is normal.
7 - If the color of the water returned to normal return the lines of output and REJECT to wash and start the process of rotation half an hour, and then stop stopling for one hour
8. Then the rotation phase for an hour and the phase of stop for 3 hours and repeat the cycle of rotation and stop three times.
9 - After these steps we unload the chemical laundry detergent of the laundry material, and re-filled with chlorine-free water and preferably RO water, and we do the work of washing Flush RO
So that the specifications of the water exiting the RO shall be the same as the water of the wash in terms of pH and salt content. During the operation of the RO, its output was improved so that the output flow was 45 L / hr, and the 25 L / hr flow. .The RO washing process was successful with citric acid (lemon salt).