A sedimentation tank is a structure that uses sedimentation to remove suspended solids in water and is an equipment for purifying water quality. Utilize the natural precipitation or coagulation precipitation of water to remove suspended solids from the water. Sedimentation tanks are divided into horizontal sedimentation tanks and vertical sedimentation tanks according to the direction of water flow. The sedimentation effect is determined by the flow rate of water in the sedimentation tank and the residence time of water in the tank. In order to improve sedimentation efficiency and reduce land area, honeycomb inclined tube reverse flow sedimentation tanks, accelerated clarification tanks, pulse clarification tanks, etc. are often used. Sedimentation tanks are widely used in wastewater treatment. Considering the flocculation factors in the process of particle precipitation, it is assumed that the sedimentation rate of particles changes at an equal acceleration, and the initial sedimentation rate is set to zero. Considering the flow velocity distribution inside the pipe, the length of the inclined pipe is - d * tg θ In the formula, a represents the acceleration of the change in particle settling velocity, i.e. a=du/dt. The above three methods have their own shortcomings。

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