A device and treatment method for zero discharge of desulfurization wastewater

Abstract

The invention relates to a desulfurization wastewater zero discharge device. In the prior art, desulfurization wastewater is discharged after being purified. The desulfurization wastewater zero discharge device provided by the invention consists of a desulfurization system, a two-section wastewater cyclone, an ultrasonic atomization nozzle, a dust remover, a wastewater pump and a wastewater delivery pump, wherein the two-section wastewater cyclone comprises a cyclone body, an overflow pipe and a filtering net; an inlet and an underflow orifice of the cyclone are connected with the desulfurization system; an overflow port is connected with the ultrasonic atomization nozzle; an inlet flue is arranged on the dust remover; the ultrasonic atomization nozzle is communicated with the inlet flue on the dust remover; the dust remover is connected with the desulfurization system. The desulfurization wastewater zero discharge device disclosed by the invention is reasonable in structural design, wastewater drainage is avoided, water resources are saved, the space and cost are also saved, and inorganic salt ions and heavy metal ions in the wastewater can be effectively removed.

Description

Technical field [0001] The invention relates to a device and a treatment method for zero discharge of desulfurization wastewater, which are used for the control of wastewater pollution. Background technique [0002] With the increasingly stringent national environmental protection policies, most of the in-service thermal power units and newly built thermal power units are equipped with flue gas desulfurization devices to ensure that the boiler flue gas emissions meet the standards. At present, the most widely used flue gas desulfurization device for coal-fired power plants is the limestone-gypsum wet desulfurization process. The main by-products of the process are desulfurization gypsum and desulfurization wastewater. The desulfurization wastewater contains a large amount of impurities, such as suspended solids and inorganic salt ions. , Heavy metal ions, etc., need to be purified before being discharged into the water body. [0003] In today's world, water resources are in short ...

AI Technical Summary

Problems solved by technology

The structure design of the invention is reasonable, which solves the problem of desulfurization wastewater treatment and disposal. Wastewater circulates in the device of zero discharge of desulfurization wastewater, and the whole device has no waste water discharge, which saves water resources; the two-stage wastewater cyclone replaces the common wastewater cyclone Flow device, triple box and dosing system, etc., and does not need to add new structures (buildings), saving space and cost; solves the problem of unsatisfactory liquid-solid separation of traditional wastewater cyclones, resulting in clogging of cyclones ; Eliminate the plate and frame filter press in the common treatment process, which reduces the investment and equipment failure rate; can effectively improve the dust removal efficiency of the dust collector, and does not affect the normal operation of the dust collector; can effectively remove inorganic salt ions and heavy metal ions in wastewater

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