[ Hongjie Water ] How many ways can you name of membrane arrangement?

Stage : refers to the number of times the raw water penetrates, that is, the number of times the produced water passes through the reverse osmosis membrane element. The desalination rate of the first stage of reverse osmosis can reach 98~99%, so multi-stage reverse osmosis can achieve a desalination rate of more than 99.5%.

Section : refers to the number of times the raw water flows through the pressure vessel, that is, the number of times the concentrated water flows through different pressure vessels.

According to the needs, multiple membrane components can be arranged into one level, two levels or even multiple levels, and the membrane components in each level can be arranged into one level, two levels or even multiple levels. The so-called one level refers to the feed liquid being separated by a single pressurized reverse osmosis, the second level refers to the feed liquid being separated by a second pressurized reverse osmosis, and so on; in the same level, the same membrane components are arranged into a segment.

reverse osmosis membrane can be divided into the following six ways:

1. One-stage continuous

After being treated by the membrane, the permeate and concentrate are continuously led out of the system. This method is characterized by a low water recovery rate.

　　2. One-stage cycle

Part of the concentrated liquid is returned to the feed liquid storage tank and mixed with the raw liquid, and then separated again through the reverse osmosis membrane assembly. Characteristics The water quality of the permeate is reduced.

　3. One-stage multi-stage continuous

The concentrated liquid of the previous stage is used as the raw liquid of the next two stages, and the cut-off permeate water is discharged continuously . Features Suitable for large water treatment volume occasions, high recovery rate, reduced amount of concentrated liquid , but the proportion of solute in the concentrated liquid is higher.

　　4. One-stage multi-stage circulation

The permeate from the next stage is used as the raw material of the previous stage for separation. In this way, the concentrated liquid can obtain a higher concentration, which is suitable for separation with concentration as the main purpose .

　5.Multi-segment cone arrangement

The sections are connected in parallel and in series, which can meet the water recovery rate requirements of the reverse osmosis system and ensure that each component in the device has roughly the same flow state. A high-pressure pump is required to prevent the production efficiency from decreasing.

　　6. Multi-stage and multi-section configuration of reverse osmosis membrane components

The multi-stage and multi-section configuration of the reverse osmosis membrane assembly also has a circulation type, which uses the permeate of the first stage as the feed water of the next stage for separation again, and continues in this way, and the permeate of the last stage is led out of the system. The concentrated liquid from the last stage is mixed with the feed liquid of the previous stage, and then separated. This method improves the recovery rate and water quality, but the consumption of the pump increases and is different from the continuous type.

The selection and arrangement of membrane components should comply with the membrane design guidelines, and also consider many factors such as system purpose, raw water conditions, equipment space limitations, system water production scale and system water recovery rate to comprehensively select the number of built-in membrane elements in the reverse osmosis pressure vessel and the basic arrangement of membrane components.

For more information, please visit the official website of Shenzhen Hongjie Water Technology Co., Ltd. www.xxjm.net . If you need any help, please call our company hotline 1 80 3800 0078 for free. We will serve you wholeheartedly.