Thermal power plant desulfurization wastewater up-to-standard discharge treatment system and method

Abstract

The invention discloses a thermal power plant desulfurization wastewater up-to-standard discharge treatment system and method. The system comprises a desulfurization wastewater input pipeline, a preliminary sedimentation pool, a heavy metal reactor, a calcium hydroxide adding device, an organic sulfur adding device, a NaClO adding device, an aeration reaction pool, a middle water pool, an electricflocculation device, a centrifugal concentration pool, a plurality of medium filters and a clear water pool. The system and the method have the advantages that the centralized treatment on thermal power plant desulfurization wastewater can be realized; after the treatment, the stable water quality capable of meeting the desulfurization wastewater discharge requirements can be obtained.

Description

Technical field [0001] The invention relates to a thermal power plant desulfurization wastewater treatment system and method, in particular to a thermal power plant desulfurization wastewater treatment system and method. Background technique [0002] In recent years, with the increasingly stringent national environmental protection standards and policies, the pollution discharge permit system has made clear requirements for the water quality of the external discharge of thermal power plants, and some economically developed areas or ecologically sensitive areas have required the entire plant to achieve zero discharge of wastewater. In this context, more and more coal-fired power plants put zero emissions on the agenda. Among them, the desulfurization wastewater is the key to achieving zero emissions for the entire coal-fired power plant due to its poor water quality and difficult to reuse. At present, except for a few power plants that can reuse desulfurization wastewater through ...

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Problems solved by technology

[0004] The desulfurization wastewater treatment process widely used in coal-fired power plants in my country is simple chemical precipitation method. The operation cost of this process is relatively low and the experience is rich, but there are difficulties in equipment operation and maintenance, large amount of sludge generation and difficult disposal, effluent COD and SS ( Suspended matter) is not easy to meet the standard, and the effluent may cause secondary pollution after being directly discharged into the environment

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