Device and method realizing synergic effects of waste heat utilization, desulfurization wastewater zero-emission and smoke plume removal

Abstract

The invention discloses a device and a method realizing synergic effects of waste heat utilization, desulfurization wastewater zero-emission and smoke plume removal, the device comprises a boiler, anair preheater, a dust remover, a desulfurization tower and a chimney which are sequentially connected through a pipeline, a wastewater sedimentation tank, a wastewater concentration tower and a wastewater flashing tower simultaneously are connected to corresponding equipment in the device, a high-temperature gas required in the working process of the wastewater flashing tower and the wastewater concentration tower is taken from high-temperature flue gas during the operation of the device; and generated gases are sent into the dust remover for dust removal circulation. An acoustic wave agglomeration device and a demister are disposed in a connecting pipe between the desulfurization tower and the chimney. The method comprises the steps of concentrating and flashing the high temperature fluegas in the process of operation of the desulfurization wastewater utilization device, and finally feeding the concentrated and flashed gas to the device for circulation, thereby achieving zero emission, discharged smoke plume can be reduced by use of synergic effects of the reduced flue gas temperature, the acoustic wave agglomeration device and the demister, and the goal of energy saving and environmental protection, wastewater zero-emission and exhaust emission reduction can be comprehensively realized.

Description

technical field [0001] The invention belongs to the technical field of realizing zero discharge of desulfurization wastewater and removing plume by using waste heat of flue gas, and in particular relates to a device and method for utilizing waste heat in cooperation with zero discharge of desulfurization wastewater and removing plume. Background technique [0002] Under the background of zero discharge of wastewater from coal-fired power plants, in order to improve the comprehensive utilization of water, power plant wastewater such as circulating water, sewage, and reverse osmosis concentrated water are all collected into the desulfurization system. Therefore, the quality of desulfurization wastewater is extremely poor, with high salt content, Properties such as easy corrosion have a serious impact on the environment. At present, power plants use the three-box method to precipitate and separate pollutants, but it is difficult to remove salt and Cl in wastewater. — , organi...

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Problems solved by technology

[0008] One of the purposes of the present invention is to realize zero discharge of desulfurization wastewater by making full use of the waste heat of the flue gas, which solves the problems of high operating costs and complicated routes of the existing process

[0009] The second object of the present invention is to solve the problems of easy fouling of equipment and easy blockage of pipelines in the wastewater treatment process by using high-energy sounding devices, effectively avoiding the problems of high operating costs and discontinuous operation caused by chemical dosing and descaling

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