Desulfurization waste water zero discharge and white smoke purification combined treatment system

Abstract

The invention relates to a desulfurization waste water zero discharge and white smoke purification combined treatment system, which comprises a desulfurization tower, a desulfurization slurry circulation spraying system, a desulfurization tower defogging device, a desulfurization tower outlet flue, a smoke gas reheater, a desulfurization waste water discharging pipeline, a desulfurization waste water discharging pump, a buffer tower, a desulfurization waste water clean liquid circulation pipeline, a desulfurization waste water clean liquid circulation pump, a heat exchanger, a sludge conveyingpipeline, a sludge conveying pump, an evaporation tower, an evaporation tower defogging device, a stirring device, a desulfurization waste water clean liquid backflow pipeline, a desulfurization waste water clean liquid backflow pump, a water steam conveying pipeline, a condensing tower, a condensing tower spraying device, a condensing tower defogging device, a vacuum pump pipeline, a vacuum pump, a cooling tower water conveying pipeline, a cooling tower water conveying pump, a cooling tower, a cooling tower water return pipeline and a water return pump. The operation cost is low; the desulfurization tower slurry is condensed; the smoke gas temperature is lowered; the smoke gas is reheated; the s white smoke purification is realized; the heat adsorbed by condensation is used for evaporating the desulfurization waste water; the energy consumption is low. The treatment system can be widely applied to power station boiler and industrial boiler smoke gas desulfurization systems.

Description

technical field [0001] The invention relates to a combined treatment system for zero discharge of desulfurization wastewater and flue gas dewhitening, which can be widely used in flue gas desulfurization systems of power station boilers and industrial boilers. Background technique [0002] Desulfurization waste water and flue gas from thermal power plants pollute the environment seriously. They are pollutants that require strict control around the world, and are also environmental protection technical problems in the production process of thermal power plants. [0003] The flue gas at the outlet of the desulfurization tower is usually saturated wet flue gas, which contains a large amount of water vapor, and the water vapor contains more dissolved salts, SO3, gel dust, and fine dust, which are the main components of smog. If the flue gas is discharged directly into the chimney and enters the ambient air with a lower temperature, since the saturated humidity of the ambient air...

AI Technical Summary

Problems solved by technology

If the flue gas is discharged directly into the chimney and enters the ambient air with a lower temperature, since the saturated humidity of the ambient air is relatively low, the water vapor in the flue gas will condense to form a wet plume during the temperature reduction of the flue gas, causing damage to the atmosphere. Visual Pollution and Environmental Pollution

[0004] At present, both desulfurization wastewater and flue gas dewhitening are treated separately. Evaporation-crystallization treatment of desulfurization wastewater has the disadvantages of complex system, high energy consumption, easy fouling of equipment and large investment, which limits industrial application; MGGH system flue gas dewhitening The moisture content of the flue gas at the outlet of the desulfurization tower cannot be reduced, and the requirements of environmental protection policies cannot be met. At present, a low-cost comprehensive treatment system for desulfurization wastewater and flue gas dewhitening is urgently needed

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