The main materials and functions of FRP membrane shell are introduced

At present, the use of reverse osmosis membrane components for water treatment technology is more and more widely used at home and abroad, including reverse osmosis membrane components pressure vessel that is reverse osmosis membrane shell, mainly used to load reverse osmosis membrane components, can effectively carry out positive and negative scour cleaning of membrane components, can reduce the fouling probability of membrane components, Thus improving the efficiency of membrane element.

Krell 4 inch membrane shell materials are mainly glass steel, stainless steel, engineering plastics, etc., the application of working pressure range is usually medium and high pressure above the occasion to glass steel. At the same time, the reverse osmosis membrane component pressure vessel *** initial use of steel pipe lining corrosion resistant coating is easy to crack, spalling, use is not safe. Later, it was changed to aluminum container, but the application found that Lv Zhilongqi was not corrosion resistant, and finally developed a glass fiber container.

No matter what membrane element must be installed in the pressure vessel side can be used, because the size of each membrane element itself is not the same, so the size of the glass fiber reinforced plastic pressure vessel used to fill the membrane element is not the same. Each pressure vessel, can be installed only a membrane element, can also be installed several membrane elements, usually in each pressure vessel can be installed 1 ~ 7 membrane elements, between the membrane element and the membrane element is connected by the internal connector, the membrane element and the pressure vessel port using the support plate seal plate lock ring support seal.

The main difference between the current pressure FRP membrane shell is the end. In the actual operation process, the water supply enters the membrane element from the feed water pipeline at one end of the pressure vessel. In the membrane element part of the water through the membrane surface to form a low salt content of product water, the remaining part continues to flow forward along the feed water channel and into the next membrane element, because the salt content of this part of the water is higher than the water supply, in the reverse osmosis system, it is called feed water, concentrated water. Product water and concentrated water *** are respectively led out of the product water channel and concentrated water channel to the pressure vessel.

Therefore, FRP with different strength and elastic properties can be obtained in a certain range of membrane shell to withstand different loads to meet the requirements of structural performance.