The Numerical Simulation Study Of HAC Efficient Clarifier’s Optimization

At present, in order to solve the contradictions of serious water pollution and stringent drinking water quality standards, strengthen the treatment effect of drinking water and improve the existing conventional process are of important significance. Hydraulic automatic control of efficient clarifier increased turbulence flocculation indoor join grid plate, in the separation of indoor setting baffle increasing water yield and reduce drug consumption. It is a new technology of water purification structures of high efficiency and energy saving, high quality, emission reduction and hydraulic automatic control which has the advantages of low operating costs, less occupied area and investment.FLUENT was adopted to simulate the hydraulic automatic control of flocculation part which the turbulent kinetic energy k and vortex velocity gradient G’as flocculation effect evaluation index in this article. This thesis explored the suitable volume ratio, grid plate layer spacing and mesh size of the first and second flocculation chamber.Concrete conclutions are as follows:(1) Under the condition of uniform volume, grid plate aperture size and hole area, flocculation effect of high-efficiency clarifier is better when the volume ratio of first and second flocculation chamber is between 1:2 and 1:3;(2) The layer spacing of flocculation area is under the range of 700 to 800 mm which performed better flocculation effect in eficient clarifier;(3) Under the same hole area, it is optimum condition for flocculation effect that the first and second flocculation chamber combination of grid plate mesh diameter are 50 mm/80 mm and 60 mm/90 mm respectively.