Device for realizing zero emission of desulfurization wastewater and coupled cooperative control of white smoke plume

Abstract

The invention discloses a device for realizing zero emission of desulfurization wastewater and coupled cooperative control of white smoke plume. The device comprises a deduster, an induced draft fan and a gas-liquid phase change coupled heat exchanger sequentially and connectedly arranged on a flue according to a direction from far to near to a desulfurization tower inlet, a desulfurization wastewater outlet of a desulfurization tower is connected with a settling tank, an outlet of the settling tank is connected with a clear water tank, an outlet of the clear water tank is connected to a liquid inlet of the gas-liquid phase change coupled heat exchanger through a pipeline, a circulating pump is arranged on the pipeline, a liquid outlet of the gas-liquid phase change coupled heat exchangeris connected with a concentrated liquid inlet of a concentrated liquid tank, a concentrated liquid outlet of the concentrated liquid tank is connected with a flash tank through a pipeline, and a flashgas outlet of the flash tank and a high-temperature gas inlet of the flash tank are connected to the flue in front of a deduster inlet through pipelines respectively. The device organically combineszero-emission of the wastewater with control of the white smoke plume of flue gas, thereby synchronously realizing the objective of pollutant treatment and control.

Description

Technical field [0001] The invention relates to the technical field of desulfurization wastewater and flue gas treatment, in particular to a device for realizing zero discharge of desulfurization wastewater and coupling and cooperatively controlling white plume, and is mainly used for a process method for zero discharge of desulfurization wastewater and white plume control. Background technique [0002] The desulfurization wastewater produced by the wet limestone-gypsum desulfurization process has the characteristics of equipment corrosion, easy fouling and clogging, and high suspended solids. It is the terminal wastewater that is difficult to treat in power plants, steel plants and other enterprises. Desulfurization wastewater usually adopts chemical treatment methods to flocculate, settle and neutralize the wastewater to reduce suspended solids and harmful substances in the wastewater. The treated effluent has a high salt content and direct discharge causes secondary pollution. ...

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Problems solved by technology

[0007] The present invention is to solve the problems of zero discharge of desulfurization wastewater and control of white plume in the current market. There is no mature technology to realize synchronous control of the two, resulting in repeated investment in projects and high operating costs. The use of flue gas The waste heat is used to realize the concentration and reduction of desulfurization wastewater through the gas-liquid phase change coupling heat exchanger, and then use part of the waste heat of the flue gas to flash the waste water concentrate, and finally realize zero discharge of desulfurization waste water; The target of effective white plume control

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