The invention discloses a method and a device for realizing
wastewater zero discharging based on a multiple-effect
sound wave action. The method comprises the steps that low-pressure
evaporation is performed on desulfurization
wastewater in a form of atomization, vapour generated after the low-pressure
evaporation is subjected to heat exchange by
wastewater and is condensated and recycled, and the unevaporated wastewater is subjected to secondary
evaporation; the device comprises a wastewater pre-heater, a wastewater heater, a low-pressure
evaporator, a condensate water recoverer, a concentrated water treating pond, an
underwater acoustic
transducer and a pneumatic generator used for removing dust and scale in a
flue, wherein the wastewater heater is connected with the low-pressure
evaporator through a pipeline, a vapour outlet of the low-pressure
evaporator is connected with the condensate water recoverer through the wastewater pre-heater, a wastewater outlet of the low-pressure evaporator is connected with the concentrated water treating pond, and the
underwater acoustic
transducer is connected with the wastewater pre-heater, the wastewater heater and the low-pressure evaporator. The method and the device provided by the invention have the
advantage that evaporated gas and the wastewater subjected to the evaporation in a wastewater treating process are effectively treated and used, so that the purpose of wastewater zero discharging is realized.