Shallow air flotation system

“The “shallow theory” was proposed by the American Hazen in 1904. The basic principle is that, assuming the length of the sedimentation tank is L, the horizontal flow velocity in the tank is V, and the settling velocity of the particles is u₀ ； Under ideal conditions, L/H = V/u₀. It can be seen that when the L and V values remain constant, the shallower the pool depth, the smaller the suspended particles that can be removed. If a horizontal partition is used to divide H into 3 layers, each with a depth of H/3, then, with u0 and V remaining constant, only L/3 is required to remove the particles at u0. In other words, the total volume can be reduced to 1/3 of its original value. If the pool length remains unchanged, and since the pool depth is H/3, the horizontal flow velocity can be increased to 3V; this still enables the removal of particles with a settling velocity of u0, meaning that the treatment capacity is increased by a factor of 3. At the same time, dividing the sedimentation tank into n layers can increase the processing capacity by n times. Zero-speed principle: The moving speed of the water distributor is the same as the flow speed of the incoming water, which results in a \"zero speed\"; this is what is defined as the zero-speed principle. The inflowing water does not cause disturbance in the source water, allowing the suspension and sedimentation of particles to occur in a static state. There are several good papers; the original poster might want to take them as a reference, as it could be beneficial. http://www.govyi.com/paper/n3/c/200603/56155.shtml http://www.zghbpd.com/uploadfile/200808/20080825110228839.doc