A foam suppressing device for power plant drainage open channel

Abstract

The invention discloses a bubble inhibition device for power plant open drainage channels. The bubble inhibition device comprises vertical wells sequentially disposed between an upstream drainage box culvert and a downstream drainage box culvert. A force reducing ridge and a stepped planar energy dissipation orifice plate are disposed in each vertical well. Each force reducing ridge is disposed at one end, close to the upstream drainage box culvert, in the corresponding vertical well. Each stepped planar energy dissipation orifice plate is disposed at one end, close to the downstream drainage box culvert, in the corresponding vertical well. The bubble inhibition device has the advantages that each force reducing ridge disposed in the corresponding vertical well can dissipate energy and raise water level; each stepped planar energy dissipation orifice plate disposed in the corresponding vertical well can limit flow, dissipate energy, inhibit bubble and eliminate vortex, different outer sea levels can be adapted to, water flows of the upstream drainage box culvert and the downstream drainage box culvert can be connected gently, and a small amount of bubbles caused by hydraulic drop and aeration during extremely low water level can be blocked above the orifice plates and cannot pass under the orifice plates and enter the downstream drainage box culvert; the bubble inhibition device is simple in structure, convenient in construction, good in bubble inhibition effect, and widely applicable to projects with box culvert drainage structures.

Description

technical field [0001] The invention relates to a foam-suppressing device used in open drainage channels of power plants. Background technique [0002] With the rapid development of economy and society, more and more power plant projects are under construction. For power plants, the design of cooling water intake and discharge is an essential process. The drainage process of the cooling water of the power plant, because of its large displacement, long drainage distance, and relatively complicated drainage structure, due to hydraulic, structural or water quality reasons during the drainage process, often results in a large amount of yellowish-brown foam at the drain outlet, which affects the power plant. Environmental assessment and sensory perception of nearby waters. Therefore, foam suppression design must be carried out in the drainage structure design of power plants. The anti-foam design is mostly located in the drainage siphon well of the power plant, and the overflo...

AI Technical Summary

Problems solved by technology

The anti-foaming design is mostly located in the drainage siphon well of the power plant, and the overflow weir and the device behind the weir are used to break the foam. However, due to the long distance from the siphon well to the drainage outlet, the water flow encounters secondary aeration during the traveling process to form bubbles

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