Discussion on the operation of the first three stages and the first two stages of the reverse osmosis device
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The reverse osmosis device of our factory was originally one level and three sections 10: 5: 3. The three-stage membrane, especially the last two, is particularly bad. Now it needs to be changed to one level and two sections 12: 6. Which structure is better?
I have never been exposed to Level 3 and Level 3, all I know is Level 1 and Level 2 12: 6. But I think the one-stage and two-stage structure is better because with the one-stage and three-stage structure, you increase the recovery rate and accordingly increase the load of the third stage membrane.
I've never seen one with three sections. What we do is always two sections, 2: 1 There are Level 3 ROs
Can you talk about it in detail? :handshake :handshake :handshake
The raw water process of the first and third stages is that the concentrated water produced after the raw water enters one stage of the RO membrane is used as the raw water of the second stage. The concentrated water produced by the second stage is used as the raw water of the third stage. Therefore, the salt content of the incoming water of the third stage is much higher than that of the raw water. This post was last edited by biechuangsou on 2007-12-19 23:41 ]
2: 1 is more classic and universal. It is recommended to use two paragraphs. If there are three stages, the third stage system will be severely fouled.
Just use two paragraphs to save your worries. I have designed a four-stage RO (4-core, not 6-core), and it runs normally.
At present, the recovery rate of RO membranes from various manufacturers is around 16%. In order to have a good recovery rate, RO membranes must be connected in parallel and in series. The first and third stages are mainly used in small systems. Their purpose is to increase the recovery rate. The disadvantage is that the third stage membrane is easy to foul and clog. The reason is that the incoming water of the third stage is the concentrated water of the second stage, and the incoming water of the second stage is the concentrated water of the first stage. Therefore, it is normal for the third stage membrane to be easier to foul than the first two stages. If the number of membrane sections must be reduced in order to protect the RO membrane, only one section should be designed in the wastewater reuse design.
The new reverse osmosis installed in our factory, two stages, 5: 3. I am not very familiar with this technology yet and am still learning. * .