Zhou Jin Zhou Sedimentation Tank Fluid Dynamics Analysis And Calculation

In recent years, as China's sewage treatment plant construction to bring in more foreign advanced equipment, people are out two weeks into the week settling tank with a superior hydraulic performance began with the understanding. The new item is no longer blindly follow the traditional center of the secondary sedimentation tank water. Around the water effluent of secondary sedimentation tanks around with a shock-resistant ability, high hydraulic loading, the settlement lasted for a short, high-precipitation zone volume utilization of advantages, but in practical engineering design was found out two weeks into the week settling tank sedimentation effect and its distribution channel water distribution uniformity greater sexual relations, if uneven water distribution channel, its superiority will be difficult to embody, Thus distribution channel is a week into two weeks out of a key component of sedimentation tank。Secondary sedimentation tank of the one-dimensional model in practical applications to achieve a wide range of success, but secondary sedimentation tanks in the interpretation of the complex flow pattern look powerless. Therefore, in secondary sedimentation tank design cannot be an effective distribution channel and its internal structure of the analysis and improvement, in order to minimize the uneven distribution of water, short-circuiting and reduce the turbulence caused by undesirable effects occur. Using computational fluid dynamics method can be secondary sedimentation tanks are designed to realize the real flow pattern simulation and analysis to design and optimize the evaluation of the program in order to avoid practical problems.In this paper, out of two weeks of weeks into the distribution channel as well as the settling tank sludge discharge pipe hydraulics analysis and the establishment of circular cloth in water, even out the flow, as well as the mathematical model of sludge discharge pipe, combined with engineering practice in the ease of construction,analysis and Presented one of the most appropriate design, combined with numerical analysis methods, the use of computer programming, accurate solution of the model to realize the operation of the secondary settling tank management and optimal control, and use the commercial CFD software FLUENT to the secondary settling tank equipped with sink, and pool flow pattern simulation, first observe the distribution channel to understand the uniformity of water distribution, and then look at the secondary settling tanks flow whether there are problemsAnd then seek to improve the distribution channel and pool flow pattern of the method or means to achieve the best results.