Overview of reverse osmosis (reverse osmosis) devices

Overview of reverse osmosis (reverse osmosis) devices

The reverse osmosis device, also known as reverse osmosis device, is called Reverse Osmosis in English. It is a new membrane separation technology developed in the early 1960s. Membrane separation and filtration technology using pressure difference as power, the research used in the development of aerospace technology in the United States in the 1960s, has gradually been transformed into industrial water treatment equipment and now more extensive domestic water treatment equipment, which has been widely used. Industrial water treatment, scientific research, medicine, food and beverage, seawater desalination and other fields. In industrial ultrapure water, electronic water treatment, electric ultrapure water, chemical water treatment, electroplating ultrapure water equipment, boiler feed water and medical ultrapure water are often used as deionization, electrodeionization The first-stage treatment of (EDI), compared with the traditional use of ion exchange resin as a pre-treatment method, the reverse osmosis (reverse osmosis) device has the advantages of more economical, more energy-saving, more stable operation, more reliable water quality, and can greatly The regeneration cycle of the ion exchange resin of the latter stage and the cleaning cycle of the electrodeionization (EDI) are extended.

How reverse osmosis (reverse osmosis) devices work

Reverse osmosis is a physical phenomenon. When two waters containing different concentrations of salt, such as a semi-permeable membrane, are separated, it is found that the water with a small amount of salt permeates through the membrane to the salt content. In high water, the salt contained does not penetrate, so gradually blend the salt concentrations on both sides until they are equal. This process is called natural reverse osmosis. The reverse osmosis device is a separation method for separating the solute in the solution from the solvent by means of the selective retention of the semipermeable membrane under pressure driving.

Reverse osmosis (reverse osmosis) device water treatment system

The reverse osmosis (reverse osmosis) device is a set of water treatment system organized around the reverse osmosis membrane. A complete reverse osmosis system is cleaned by the pretreatment part, the reverse osmosis main unit (membrane filtration part), the post-treatment part and the system. Partially composed.

1. The reverse osmosis (reverse osmosis) device pretreatment is often composed of a quartz sand filter device, an activated carbon filter device, and a precision filter device. The main purpose is to remove sediment, rust, colloidal substances, suspended solids, pigments and odors contained in the raw water. Biochemical organic matter, reducing the residual ammonia value of water and harmful substances such as pesticide pollution. If the content of calcium and magnesium ions in the raw water is high, the soft water device needs to be added. The main purpose is to protect the reverse osmosis membrane of the latter stage from the destruction of large particulate matter, thereby prolonging the service life of the reverse osmosis membrane.

Second, the reverse osmosis host is mainly composed of a booster pump, a membrane shell, a reverse osmosis membrane, a control circuit, etc., and is the core part of the entire water treatment system. The quality of the water quality depends mainly on this part. As long as the model of the membrane and the model of the booster pump are selected, the reverse osmosis host can achieve a filtration capacity of more than 99% of the salt in the water, and the conductivity of the effluent can be guaranteed within 10 us/cm (25 degrees).

3. The post-treatment part of the reverse osmosis (reverse osmosis) device is mainly to further treat the pure water taken by the main mechanism of reverse osmosis. If the subsequent process is connected with ion exchange or electrodeionization (EDI) equipment, the industrial super can be obtained. Pure water, if it is used in the direct drinking water process, it is often connected to a post-sterilization device, such as a paper germicidal lamp or an ozone generator, so that the water can be directly consumed.

4. In order to ensure the normal operation of the reverse osmosis (reverse osmosis) device and prolong the service life of the reverse osmosis membrane element, when the reverse osmosis system is operated for a period of time, the calcium carbonate scale, the metal oxide scale in the water, and the biological growth (bacteria, fungi) are removed. Materials such as mold, mold, etc. need to be cleaned.

When does the reverse osmosis membrane need to be cleaned?

Please contact our technical department for information on how to clean the membrane module and what kind of chemicals to use for cleaning. We will give you a satisfactory answer.

Application fields and characteristics of reverse osmosis (reverse osmosis) devices

The reverse osmosis membrane separation technology is separated by the reverse osmosis membrane principle and has the following remarkable features:
· Separation of solute and water under conditions where phase change does not occur at room temperature, suitable for separation and concentration of heat sensitive substances, and lower energy consumption compared with phase change separation methods

· Reverse osmosis membrane separation technology has a wide range of impurity removal applications.
·High salt rejection and water reuse rate, and cut off solute with a particle size of several nanometers or more.
· Using low pressure as the membrane separation power, the separation device is simple, the operation, maintenance and self-control are simple, and the site is safe and sanitary.

Reverse osmosis (reverse osmosis) device technology in power plant boiler feed water treatment, ultra-pure water treatment in electronics and semiconductor industries, pure water treatment in chemical and pharmaceutical industries, food, beverage, drinking water treatment, seawater, brackish water desalination, metallurgy It has been widely used in industries such as light industry, electroplating and leather.