Desulfurization wastewater drying and concentrating integrated device

Abstract

The invention discloses a desulfurization wastewater drying and concentrating integrated device which comprises a drying and concentrating integrated tower, a flue gas distributor, a desulfurization wastewater concentrated liquid atomizing nozzle, an air preheater inlet flue, an electric dust collector inlet flue, a desulfurization wastewater pipeline, a desulfurization wastewater concentrated liquid atomizing pump and a desulfurization wastewater concentrated liquid pipeline; a central cylinder is arranged in the drying and concentrating integrated tower; a wastewater concentrating and cooling chamber is arranged on the upper side of the central cylinder in the drying and concentrating integrated tower; an annular ascending chamber is formed between the outer wall of the central cylinder and the side wall of the drying and concentrating integrated tower, and the flue gas distributor and the desulfurization wastewater concentrated liquid atomizing nozzle are both located in the central cylinder; and the bottom of the central cylinder is communicated with the bottom of the circular ascending chamber. According to the desulfurization wastewater drying and concentrating integrated device, the heat of flue gas can be fully utilized, and the energy consumption of a desulfurization wastewater zero discharge system is reduced.

Description

technical field [0001] The invention belongs to the technical field of pollutant control, and relates to an integrated device for drying and concentrating desulfurization wastewater. Background technique [0002] Limestone-gypsum wet flue gas desulfurization technology has become the mainstream treatment process for power plant flue gas desulfurization in my country due to its advantages of high desulfurization efficiency, mature technology, reliable operation and strong adaptability to coal types. According to statistics, more than 90% of coal-fired power plants in my country use limestone-gypsum wet desulfurization process. In order to ensure the stable operation of the desulfurization system, a certain amount of wastewater must be discharged from the desulfurization system. These discharged desulfurization wastewater often contain many impurities, such as sulfates, heavy metals, suspended solids, and are listed as No. 1 in the "Comprehensive Wastewater Discharge Standard"...

AI Technical Summary

Problems solved by technology

After the hot flue gas at the inlet of the air preheater is dried and crystallized in the concentrated liquid, the temperature of the flue gas discharged into the inlet of the electrostatic precipitator is still high, and the heat of the flue gas is not fully utilized, which makes the operation energy consumption of the desulfurization wastewater zero discharge system high

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