SW30HRLE-400 Seawater RO Membrane Filter Element

introduction

In today's water treatment field, reverse osmosis RO membrane technology has become one of the key core technologies due to its excellent separation performance and wide range of applications. RO membranes can efficiently remove various impurities from water, providing high-quality purified water for people. They play an irreplaceable role in fields such as drinking water treatment, industrial water treatment, and seawater desalination. This article will provide an in-depth introduction to the working principle, characteristics, types, application fields, and future development trends of RO membranes.

Working principle of RO membrane

RO membrane is a semi permeable membrane, and its working principle is based on the theory of dissolution diffusion. Under pressure, water can pass through the RO membrane, while impurities such as dissolved solids, organic matter, and microorganisms in the water are intercepted. Specifically, when water containing impurities passes through an RO membrane under pressure, water molecules will diffuse through the membrane, while impurity molecules are blocked on one side of the membrane due to their larger size or interaction with the membrane, thus achieving the separation of water and impurities.

The separation process of RO membrane mainly includes the following steps:

1. Adsorption: When water comes into contact with the RO membrane, the chemical properties of the membrane surface will cause water molecules to preferentially adsorb on the membrane surface.

2. Diffusion: Water molecules adsorbed on the membrane surface will diffuse through the membrane, while impurity molecules are blocked on one side of the membrane.

3. Permeation: Water molecules passing through the membrane will permeate towards the other side of the membrane under the pressure difference, forming purified water.

RO membrane technical parameters:

Filtration accuracy: The pore size of the RO membrane is about 0.0001 microns, which can filter out impurities such as bacteria and viruses.

Flux: refers to the amount of water passing through an RO membrane per unit time, depending on factors such as membrane area, pressure, and water quality.

Desalination rate: The filtration efficiency of RO membranes for salts, usually expressed as a percentage, typically between 95% and 98%.

Pressure loss: The pressure difference required for water to pass through the RO membrane, and the smaller the pressure loss, the lower the energy consumption.

Molecular weight retention: The maximum molecular weight that an RO membrane can filter, which is crucial for selecting the appropriate RO membrane.

Membrane thickness: The thickness of an RO membrane, which typically has higher flux and lower salt resistance.

Replacement cycle: It is recommended to replace every 8-12 months, depending on the water quality and usage habits.

Characteristics of RO membrane

1. Efficient separation performance

RO membrane can remove the vast majority of impurities in water, including dissolved solids, organic matter, microorganisms, heavy metals, etc., with a desalination rate of over 99%. Its separation accuracy is much higher than other water treatment technologies, and it can provide users with high-quality purified water.

2. Easy to operate

The operation of RO membrane system is relatively simple, and only a certain pressure needs to be applied to achieve water separation. The system has a high degree of automation, stable operation, and low maintenance costs.

3. Small footprint

The equipment of RO membrane system is compact, occupies a small area, and is suitable for use in places with limited space. For example, a household RO water purifier can be installed under the kitchen sink without taking up too much space.

4. Strong adaptability

RO membranes can adapt to different water quality and temperature conditions, and can effectively treat water sources with high hardness, high salt content, and high organic matter content. Meanwhile, the RO membrane can also operate normally within a certain temperature range and has strong adaptability.

5. Environmental protection and energy conservation

RO membrane technology does not require the addition of chemical agents in the water treatment process and does not produce secondary pollution. In addition, the energy consumption of RO membrane system is relatively low, and it has good energy-saving effect.

Application areas of RO membrane

Drinking water treatment

RO membranes have been widely used in the field of drinking water treatment. It can remove harmful substances such as heavy metals, organic matter, bacteria, and viruses from water, providing people with safe and healthy drinking water. Home RO water purifier is one of the most common RO membrane application products, which can be installed in the kitchen or bathroom of a household to provide high-quality drinking water for the family. In addition, RO membranes can also be used for centralized water supply in residential areas, drinking water treatment in schools, hospitals, hotels, and other places.

Industrial water treatment

In the industrial field, RO membranes can be used to prepare various industrial water, such as electronic industry water, pharmaceutical industry water, chemical industry water, etc. These industries have very high requirements for water quality, requiring the removal of almost all ions and particles to prevent any impact on product quality. RO membrane technology can meet the high water quality requirements of these industries and provide reliable water sources for industrial production.

Seawater desalination

Desalination of seawater is one of the important ways to solve the global water shortage problem. RO membrane technology has important application value in the field of seawater desalination. It can remove salt and other impurities from seawater, producing fresh water that meets drinking water standards. Compared with traditional seawater desalination technology, RO membrane technology has the advantages of low energy consumption, simple operation, and small footprint, and has broad development prospects.

waste water treatment

RO membrane can be used for wastewater treatment to remove harmful substances from wastewater and achieve the recycling and utilization of wastewater. For example, in the wastewater treatment of industries such as printing and dyeing, papermaking, and electroplating, RO membranes can remove impurities such as dyes, heavy metals, and organic matter from the wastewater, enabling it to meet discharge standards or be reused in the production process. In addition, RO membranes can also be used in fields such as urban sewage treatment and landfill leachate treatment.

conclusion

RO membrane, as an efficient separation technology, plays an important role in the field of water treatment. It has the advantages of efficient separation performance, simple operation, small footprint, strong adaptability, environmental protection and energy saving, and is widely used in fields such as drinking water treatment, industrial water treatment, seawater desalination, and wastewater treatment. With the continuous advancement of technology, the performance of RO membranes will continue to improve, and their application fields will also continue to expand. In the future, RO membrane technology will develop towards high performance, multifunctionality, green environmental protection, and intelligence, making greater contributions to solving the global water shortage problem and protecting the environment.

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