Desulfurization waste water treatment system and treatment method thereof

Abstract

The invention relates to a desulfurization waste water treatment system and a treatment method thereof. The system comprises a water collecting, adjusting and buffering pond, an integral treatment machine, an aeration pond, a security filter and an electro-deionization device. The integral treatment machine is provided, so that integral treatment of two essential processes of removing heavy metalsand fine suspended matters in desulfurization waste water is realized, the heavy metals contained in the waste water are chelated into a chelate compound, and the fine suspended matters per se in thewaste water are combined and flocculated into flocculating constituents; a chelating process and a flocculating process are performed in stages, so that the reaction processes are prevented from interfering with each other, and are facilitated synergistically; clear water deposited after integral treatment is desalted fully by an electro-deionization technology, and switching between an electro-deionization process and an electrode regeneration process is realized automatically based on transduction. The desulfurization waste water treatment system has the advantages of high automatic fine control degree, and stable and efficient treatment effect.

Description

technical field [0001] The invention relates to the technical field of environmental protection treatment in the electric power industry, in particular to a desulfurization wastewater treatment system and a treatment method thereof. Background technique [0002] For the emission of sulfur dioxide flue gas from industrial sectors such as power plants, the current mature method is to use limestone-gypsum wet desulfurization, and the flue gas after the dust removal process enters the absorption tower for spray desulfurization, and then discharges it into the atmosphere. [0003] However, the absorption tower will output desulfurization wastewater to the outside. The desulfurization wastewater is acidic and has a pH value of about 4; it contains a large number of fine suspended particles, including gypsum particles, A1 and Fe hydroxides, etc., and the turbidity is high; it is rich in sulfide, Pollutants such as fluoride, COD, and heavy metal ions such as mercury, chromium, arsen...

AI Technical Summary

Problems solved by technology

The technical problems to be solved by the present invention include: how to improve the treatment efficiency of desulfurization wastewater, how to promote the efficient and thorough removal of various pollution components such as heavy metals, particulate matter, and salt components in wastewater, how to effectively promote the water recycling of the flue gas desulfurization system and Ensure the stability and reliability of desulfurization wastewater treatment

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