Desulfurization waste water recycling device

Abstract

The invention discloses a desulfurization waste water recycling device which comprises a waste water pool, a pipeline, a flange, a valve, a water pump and a slag extractor. The waste water pool, the water pump and the slag extractor are sequentially connected by the pipeline; the flange and the valve are arranged on the pipeline. Desulfurization waste water is relatively high in salt content and discharge of the desulfurization waste water can directly cause change of physicochemical properties of soil and water, break soil ecology and influence aquatic organisms and surface and underground water sources, and thus, the desulfurization waste water recycling device disclosed by the invention utilizes the desulfurization waste water to supplement water for water level operation of a hull of the slag extractor, so that supplementary water capacity of circulating water is reduced, and water resources are saved. In addition, the desulfurization waste water recycling device is simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment, in particular to a desulfurization wastewater recycling device. Background technique [0002] Thermal power plants adopt limestone-gypsum wet flue gas desulfurization technology to remove SO from flue gas 2 . In the wet flue gas desulfurization process, in order to maintain the stable operation of the system and ensure the quality of gypsum products, it is necessary to control the concentration of Cl- in the slurry to not be too high, so a part of the slurry needs to be discharged to generate desulfurization wastewater. Impurities in desulfurization wastewater from thermal power plants come from flue gas and limestone for desulfurization, mainly including suspended solids, supersaturated sulfite, sulfate and heavy metals: many of them are the first category of pollutants that are required to be controlled in the national environmental protection standards. Particula...

AI Technical Summary

Problems solved by technology

There are many ways to treat desulfurization wastewater from power plants in my country, which can be divided into two types: (1) High-concentration desulfurization wastewater is sprayed into slag, and the heavy metals and salts in the desulfurization wastewater are absorbed by the slag to reduce the concentration of heavy metals and chloride salts in the solution. The purpose of concentration, the practice conclusion tells us that this method has certain effect really, but heavy metal, chloride salt content are still very high, when reusing this solution again, often cause the shower head of sprinkler to block (the salt content is too high, evaporation Crystallization is too fast, causing blockage); (2) chemical precipitation (commonly known as triple box precipitation) is used to treat desulfurization wastewater. The desulfurization wastewater after treatment has a small amount of water but a high salt content, and it is easy to cause secondary pollution after direct discharge

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