Steel Palisade fencing is one of fencing series. It is used in England at first. Now Steel palisade fence is widely used at home and abroad. Now it is at home and abroad has been widely.Used as its beautiful architecture and various styles .euro fence is divided into W-type and D-type fence according to the shape of the cross section.
Steel Palisade fencing instead of the brick wall or heavy fence makes your life environment clear.
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According to the theory of double membranes, there are gas film and liquid film at the gas-water interface, air and liquid flow outside the gas film and outside the liquid film, and it belongs to the turbulent flow state. The gas film and the liquid film are in laminar flow state. There is no convection and under certain conditions there will be pressure gradients and concentration gradients. If the concentration of oxygen in the liquid film is lower than the saturation concentration of oxygen in the water, the oxygen in the air continues to diffuse inwards through the liquid film into the water, so the liquid film and gas film will become barriers to oxygen transmission. This is the double film theory.
Obviously, the most effective way to overcome the liquid film barrier is to quickly change the "air-liquid" interface. Aeration and agitation is such that the specific approach is to: reduce the size of the bubble, increase the number of bubbles, increase the degree of turbulence in the liquid, increase the installation depth of the aerator, and extend the contact time between the bubble and the liquid. Aeration equipment is based on this practice and is widely used in wastewater treatment.
It is widely used because of people`s environment pursuit, publicity of personal cleanliness and the pursuit of
foreign style.
Steel Palisade fencing with beautiful structure and various styles are popular and widely used.
Aeration head aeration principle
Aeration is a means of intensively contacting air with water. Its purpose is to dissolve the oxygen in the air in water, or to exhale unwanted gases and volatile substances in the water. In Other words, it is a means to promote the exchange of substances between gas and liquid. It also has other important functions such as mixing and stirring. Oxygen in the air is transferred to water through aeration, and oxygen transfers from the gas phase to the liquid phase. This theory of mass transfer and diffusion is currently applied by Lewis and Whitman's double-film theory.