The Application Research Of Sea Water Desalinization Technique In Dsgushan Thermal Power Plant

With the progress of The Times,and the development of world economy, the demanded of freshwater resources in human society became more and more.the freshwater resources are limited,how to use the earth's seawater resource has become the world frontier research. In the 20th century, seawater desalination technology developed quickly and the freshwater resources crisis is not over. Middle Eastern countries, and western developed countries have built fairly large desalination plant.This paper introduced the development and application of seawater desalination. This paper introduced reverse osmosis technology applicated in DaGuShan project. And introduced device characteristics, system structure, the actual operation of the device in detail. This paper commented on the operation of Dagushan seawater desalination project,and put forward some good ideas.This project using ultrafiltration and reverse osmosis membrane of leaking water desalination technology, the centrifugal pump export water pressure outside the ascension into the ultrafiltration device, ultrafiltration device as seawater reverse osmosis system of pretreatment, filtration method adopts full filtration, namely dead end filter. This makes the material and water content of impurities such as colloid particles, which can further reduce turbidity water below 0.2 NTU, reduced to less than 3 SDI value. The systematic desalination rate can be more than 98%, salt 32,000mg/L at 25,000-the salt water desalination, output in 300-500mg/L of fresh water.