A drainage defoaming system and method for thermal nuclear power plants

Abstract

The invention relates to a water-draining defoaming system and method used for a fire nuclear power plant. The water-draining defoaming system comprises an overflow weir arranged at a water outlet side of a water inlet front tank and a divergent weir rear pool channel, wherein at least one orifice plate for dissipating energy and a foam blocking wall are sequentially arranged in the weir rear pool channel; and a spraying water facility is arranged above a water area between the orifice plate for dissipating energy and the foam blocking wall. According to the water-draining defoaming system, the orifice plate for dissipating energy, the foam blocking wall, the spraying water facility and the like are arranged outside a water-draining siphon well of the fire nuclear power plant, so that foams generated by the siphon well are completely processed before being discharged, and therefore, a contamination phenomenon that vast stretches of foams appear in a water-draining area is avoided. On the premise of not increasing earth excavation amount, a facility of eliminating foams is directly arranged in the original water-draining divergent pool channel, so that a defoaming function is realized. The water-draining defoaming system has the characteristics of being strong in adaptation, high in efficiency and green and pollution-free, is simple in structure, and is relatively low in operation and maintenance cost.

Description

technical field [0001] The invention relates to a drainage defoaming system and method for thermal nuclear power plants, a hydraulic facility and a design method, and an environmental protection system and method for reducing drainage foam pollution. Background technique [0002] The environmental impact of thermal / nuclear power plant drainage foam is ubiquitous. Early projects did not pay enough attention to the problem of foam pollution in drainage. Basically, no anti-foaming and defoaming measures were taken in the drainage of power plants, and the foam problem was serious. In recent years, with the increasing environmental protection awareness of the whole people, the design of power plant drainage engineering has begun to consider anti-foaming and defoaming measures. It is difficult for engineering measures to meet the needs of tide level changes. Under low tide conditions, drainage is easy to be aerated to generate foam, and it is carried to the open sea, forming a fo...

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Problems solved by technology

Early projects did not pay enough attention to the problem of drainage foam pollution, basically no anti-foaming and defoaming measures were taken for the drainage of power plants, and the foam problem was serious

In recent years, with the increasing environmental protection awareness of the whole people, the design of power plant drainage engineering has begun to consider anti-foaming and defoaming measures. It is difficult for engineering measures to meet the needs of tide level changes. Under low tide conditions, drainage is easy to be aerated to generate foam, and it is carried to the open sea, forming a foam pollution belt; second, existing engineering measures cannot completely prevent foam generation, and foam barriers are basically used. Measures to contain foam in the area behind the siphon well weir, the area behind the weir gradually accumulates foam, prone to foam overflowing the siphon well, polluting the factory area, etc. Further engineering measures are required to avoid foam accumulation and overflow

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