Combined defoaming and siphoning well and combined defoaming and siphoning method

Abstract

The invention relates to a combined defoaming and siphoning well and a combined defoaming and siphoning method. The combined defoaming and siphoning well comprises at least one siphoning well combined body, wherein the siphoning well combined body comprises a vertical well with a water inlet square culvert, a spill pit, an overflow weir, a spill pit and a water conveying square culvert; a diversion pier is arranged between the water inlet square culvert and the overflow weir at the bottom of the vertical well and is opposite to the central axis of the water outlet direction of the water inlet square culvert; the overflow weir is arranged on one side of the vertical well, and the part, adjacent to the top, of the overflow weir is provided with front weir diversion grids arrayed horizontally; at least one vertically-arranged defoaming orifice plate used for dividing the spill pit into two parts is arranged between the overflow weir in the spill pit and the outlet of the water conveying square culvert; the bottom, connected with the water outlet square culvert, of the spill pit inclines downwards. The siphoning well is provided with the diversion pier and the front weir diversion grids, so that the nappe over weir is uniform and stable; the defoaming orifice plate is used for energy dissipation and flow equalization, so that the flowing speed of waterflow after jumping is reduced; the inlet elevation of the water conveying square culvert is reduced, so that bubbles are prevented from entering the water conveying square culvert. By virtue of the measures, the bubble problem of the drainage siphoning well is solved.

Description

technical field [0001] The invention relates to a combined defoaming siphon well and method, which is a hydraulic facility and method, and an environmental protection facility and method. Background technique [0002] Coastal thermal power or nuclear power plants that adopt the direct current cooling method generally have drainage siphon wells to reduce the head of the water pump by using the siphon effect and save energy. In the siphon well, there is an outflow weir whose top elevation exceeds the average tidal level, so as to reduce the influence of the tide level change in the open sea on the upstream section of the siphon well. Most of these weirs use thin-walled weirs, practical weirs, and wide-crested weirs for free overflow drainage, resulting in strong water-air mixing during the water drop behind the weirs, resulting in hard-to-break yellowish foam, forming foam pollution areas , the splashed salt mist will also corrode the metal structures near the drain, and in o...

AI Technical Summary

Problems solved by technology

Most of these weirs use thin-walled weirs, practical weirs, and wide-crested weirs for free overflow drainage, resulting in strong water-air mixing in the process of water falling behind the weirs, resulting in light yellow foam that is not easy to burst, forming foam pollution areas , the splashed salt mist will also corrode the metal structures near the drain, and in order to reduce the engineering volume in the design of many power stations, the size of the designed siphon well is often too small, resulting in poor flow of the water flow on the weir, which intensifies the foam produce

Once these foams enter the sea area near the outlet with the water flow, they will form foam pollution areas, form visual pollution, and affect the sea area environment near the power station

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