Alternate vertical filtration overflow water taking type desilting basin

Abstract

The invention belongs to the technical field of hydraulic structure design of water conservancy and hydropower engineering, and particularly relates to an alternate vertical filtration overflow water taking type desilting basin. The desilting basin is sequentially provided with a first diffusion section, a first-stage desilting basin, an overflow section, a second diffusion section and a second-stage desilting basin in the water flow direction, and is characterized in that a first sluice and a diversion canal are obliquely crossed at an angle of 30-60 degrees and are used for obliquely diverting water; water flow in the first-stage desilting basin enters a first-stage filter tank through water-emitting holes on a first-stage rectifying plate, is filtered by a section of filter layer and then flows into a water collecting port from a pair of overflow water channels, and the water flow overflows into the water collecting port from the flow blocking wall at the water outlet end of the first-stage filter tank; and water flow in the second-stage desilting basin enters a second-stage filter tank through water-emitting holes in a second-stage rectifying plate, is filtered by a second inverted filter layer and then overflows into a water outlet from a flow blocking wall at the water outlet end of the second-stage filter tank, sand sinks downwards, and water is taken upwards. By means of the inclined water diversion and upward water taking mode, large-particle silt is effectively filtered and enters the pond.

Description

technical field [0001] The invention belongs to the technical field of hydraulic structure design of water conservancy and hydropower projects, and is suitable for water intake projects on channels with high sediment content, in particular to an alternate vertical filter overflow water intake type grit chamber. Background technique [0002] The grit chamber is one of the important components of the water diversion project, and the sand content of the grit chamber is the most important factor that determines whether the water diversion project can operate normally. [0003] The desilting tank of the water diversion project usually adopts a single-chamber or multi-chamber arrangement. After the water entering the pool diffuses, the flow section increases, the flow velocity of the water flow becomes smaller, and the hydraulic sand-carrying force is reduced. The sediment in the water flow that is larger than the design sedimentation particle size Settling can be obtained, which ...

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Problems solved by technology

[0004] For the water diversion project on the channel with high sediment content, only by reducing the flow velocity, the sediment content in the outlet pond cannot meet the water supply requirements, and after a large amount of sediment settles and silts up, the sedimentation effect of the sedimentation tank will drop sharply, seriously affecting The normal operation of the entire water intake project

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