Two Stage RO System

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Chunke designed a reverse osmosis water purification system as regards customer design. If you want to reduce wasting concentrated water quantity, we can apply two stages Ro system.

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Guangzhou Chunke Environmental Technology Co. Ltd

Guangzhou, China

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At the II stages, the RO system feeds water and passes the first stage RO membrane and gets permeated (pure water) and concentrated water, this concentrated water sends to the second stage RO membrane and you get again permeated from the second stage RO system. This kind of system increases the recovery rate for all of the systems.
The below figure shows an array of 3 pressure vessels for a two-stage RO system. The pressure vessels are arranged into 2 sets, with 2 pressure vessels in parallel followed by 1 single pressure vessel. The 2 sets of pressure vessels are in series. Each set of pressure vessels in parallel (even if there is only 1 vessel) is called a STAGE.
In theory, influent water to the industrial reverse osmosis water system is split evenly among the pressure vessels in the first stage. Permeate from each pressure vessel in the first stage is combined and collected in a common header. The rejection from the first stage becomes the influent to the second stage for the two-stage RO system. Permeate from the pressure vessels in the second stage is collected and combined with permeate from the first stage to become the overall permeate from the industrial reverse osmosis water system. The rejection from the second stage becomes the rejection of the entire system.
As you see from the two stages industrial reverse osmosis water system, concentrated water is passing the membrane system again, in the double pass system, pure water passes the membrane system again. Here we explain just the reverse osmosis side for industrial water conditioning, of course, the pretreatment side as optional has sand, activated carbon, anion exchange water treatment, softener…etc for a two-stage RO system.
Anion exchange water treatment softener or cation exchange water treatment can help to get soft water for industrial water conditioning applications. The pretreatment side especially anion exchange water treatment filters and cation exchange water softeners do not affect TDS readings significantly in industrial reverse osmosis water systems.
Industrial water conditioning includes a pretreatment, ultra-filtration, reverse osmosis, anion exchange water treatment, ion exchange softeners, and post-treatment modules. Which models do we use; we can decide as regards your water analysis report and application. To get more info about anion exchange water treatment as industrial water conditioning, please see our water softener and EDI system details.

Two Stage RO Systems and Double Pass RO Systems terms are mostly used wrong in industrial reverse osmosis water systems. First of all, we understand this term clearly. Focusing on spiral wound membrane modules as the most common type of membrane modules used in industrial water conditioning today, an RO array or “skid” or “train” consists of a number of pressure vessels arranged in specific patterns.