Desulfurization wastewater treatment system, and desulfurization wastewater treatment method

Abstract

The invention provides a desulfurization wastewater treatment system and a desulfurization wastewater treatment method. The desulfurization wastewater treatment system comprises a desulfurization device, a wastewater cyclone, a sand filtration system, a flue-type heat exchanger, an ultrasonic atomization device and a dust removing device, wherein the wastewater cyclone is used for solid-liquid separation of desulfurization wastewater; the sand filtration system is used for filtering the desulfurization wastewater; the flue-type heat exchanger is located in the inlet flue of the desulfurization device, and the desulfurization wastewater exchanges heat with high-temperature flue gas in the flue-type heat exchanger; the ultrasonic atomization device has a nozzle and atomizes the desulfurization wastewater to form droplets; the dust removing device has an inlet flue; the nozzle of the ultrasonic atomization device is arranged in the inlet flue of the dust removing device so as to allow the atomized desulphurization wastewater to be sprayed into the inlet flue of the dust removing device; the atomized desulfurization wastewater is dried by high-temperature flue gas, and inorganic salt particles are precipitated; and the inorganic salt particles enter the dust removing device and are then removed.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a desulfurization wastewater treatment system and a desulfurization wastewater treatment method. Background technique [0002] Under the requirements of domestic environmental protection transformation, most of the thermal power units currently in service and newly built thermal power units are equipped with flue gas wet desulfurization devices to ensure that the flue gas emitted by the coal-fired boilers of thermal power units meets the standards, especially to meet strict environmental protection requirements. Ultra-low emission standards. Among them, more than 90% of the coal-fired power plants adopt the limestone-gypsum wet desulfurization process and its devices. This process has outstanding advantages and is widely used. The main by-products are desulfurization gypsum and desulfurization wastewater. Desulfurization gypsum can be reused, but desulfurization was...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a desulfurization wastewater treatment system and desulfurization wastewater treatment method to solve the above-mentioned problems in the existing desulfurization wastewater treatment process and the excessive gas temperature of the flue gas entering the desulfurization device in the existing wet desulfurization process. High, the problem of ineffective rapid cooling and cooling

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