Design and optimization of coagulation-sedimentation stacked clear water tank in a water treatment plant in Xi'an city
The coagulation-sedimentation stacked clear water tank in a water treatment plant in Xi'an city is composed of a mechanical mixing well,a folded plate flocculation tank,a horizontal flow sedimentation tank,an inclined tube sedimentation tank,and a clear water tank.Under the condition of limited plant area,the mechanical mixing well,folded plate flocculation tank,horizon-tal flow sedimentation section+inclined tube sedimentation tank,and clear water tank are stacked to save the plant area.During the design process,the complex installation process of the folded plate in the flocculation tank is simplified,the traveling mud suction machine and the flushing and drainage system of the sedimentation tank are optimized,and the adjustment function of the long-term and short-term overflow weir of the clear water tank is realized.These methods solve the problems of complex installation process of folded plate in flocculation tank,incomplete mud dis-charge at both ends of sedimentation tank,easy flushing and drainage of circulating sludge in sedi-mentation tank,and waste of clear water tank volume caused by different water volumes in the long and short term.It ensures the process treatment effect,reduces construction difficulty,sim-plifies operation management process,and improves project efficiency.