High-efficiency and energy-saving wastewater evaporation crystallizer

Abstract

The present disclosure relates to a wastewater flue evaporating device. An wastewater evaporation crystallizer is provided, including an evaporating tube inlet, an inlet flange, an inlet chamber, a pneumatic inlet baffle, an evaporating tube body, a pneumatic outlet baffle, an outlet chamber, an outlet flange, and an evaporating tube outlet which are successively coupled, where the evaporating tube inlet is connected to provide a gas pipeline; the gas pipeline is connected on a flue between an external denitration device and an air preheater; the evaporating tube outlet is communicated with an inlet flue of a dust collector; the evaporating tube body is provided with a wastewater nozzle; and the wastewater nozzle is communicated with a pretreated waste pipe. The present disclosure provides an efficient and energy-saving wastewater evaporation crystallizer which increases evaporation efficiency by bringing in a high-temperature gas at a front end of the air preheater.

Description

technical field [0001] The invention relates to a waste water flue evaporation device, in particular to a high-efficiency and energy-saving waste water evaporation crystallizer which utilizes the heat of high-temperature flue gas at the front end of an air preheater to evaporate waste water. Background technique [0002] my country is a country dominated by thermal power generation. Coal burning in thermal power plants causes serious air pollution: power system SO 2 Emissions accounted for the national SO 2 more than 45% of emissions. In response to State's response to SO 2 Most thermal power plants are equipped with desulfurization systems, among which the limestone-gypsum wet flue gas desulfurization technology (Limestone Gypsum Wet Flue Gas Desulfurization) relies on high desulfurization efficiency, stable equipment operation, cheap absorbent raw materials, and by-products Reusable and other advantages, become the first choice for thermal power plant desulfurization pr...

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Problems solved by technology

However, with the country's industrial adjustment, the load rate of thermal power plants is low, and the exhaust gas temperature is reduced. When the load is low, the exhaust gas temperature of the air preheater is reduced to less than 110°C, which affects the evaporation effect of the liquid droplets (the smoke temperature is lower than the acid dew point on the equipment. Corrosion) and evaporation; on the other hand, the forced popularization of low and low temperature (GGH) reduces the effective flue length available for flue evaporation, and the narrow space limits the amount of evaporated water; the complex structure of the flue and the The internal support rods increase the risk of ash, scaling and corrosion, and have a greater impact on the original equipment (flue, dust collector) of the power plant

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