Reverse osmosis purified water equipment
Release date: November 27, 2019 11:54:03
1. Basic principle:
When pure water And brine is separated by an ideal semi permeable membrane, which only allows water to pass through and prevents salt from passing through. At this time, water on the pure water side of the membrane will spontaneously flow through the semi permeable membrane and flow into the brine side. This phenomenon is called permeation. If pressure is applied on the brine side of the membrane, the spontaneous flow of water will be inhibited and slowed down. When the applied pressure reaches a certain value, the net flow of water through the membrane is equal to Zero, this pressure is called osmotic pressure. When the pressure applied to the brine side of the membrane is greater than the osmotic pressure, the flow direction of water will be reversed. At this time, the water in the brine will flow into the pure water side, and the above phenomenon is water reverse osmosis The basic principle of (RO) treatment.
2. Product features
RO reverse osmosis purification equipment adopts efficient and energy-saving membrane separation technology. The desalination rate of reverse osmosis purification is as high as 98%. There is no need for acid-base regeneration, which is conducive to environmental protection and can realize automatic operation and remote temporary control.
3. Reverse osmosis process
Reverse osmosis technology is based on the pressure greater than osmotic pressure, through the capillary effect of membrane to complete the filtration process.
The reverse osmosis technology includes three parts: pretreatment process, membrane module connection process and post-treatment process.
Pretreatment process is also known as pretreatment process, its purpose is to improve the water quality of the treated water, prevent the pollutants in water from polluting the membrane, prolong the service life of the membrane, and reduce the operation cost.
Membrane module connection mode: it is usually divided into one-stage and multi-stage connection (divided into one stage and multi-stage). The so-called first stage refers to the membrane separation after the feed is pressurized once, and the secondary separation requires membrane separation by secondary pressure.
Post treatment process: membrane permeated water is also known as fresh water, that is, the effluent through reverse osmosis membrane after pressurization. As the membrane can not retain all inorganic and organic matters, there must be some ions and gases, such as Na +, HCO3 -, CO2, etc. if it is used for high purity water, ion exchange and deoxidation tower should be further used as post-treatment of permeated water.
Reverse osmosis (RO) is widely used in desalination of seawater and brackish water, pure hydration equipment in food industry, drinking water and pharmaceutical industry due to its high desalination rate, simultaneous removal of bacterial endotoxin and other organic matter, and low operating cost. It is especially suitable for industries with both desalination requirements and bacterial particles removal.