L-shaped desulphurization wastewater flue gas evaporating plant

Abstract

The invention discloses an L-shaped desulphurization wastewater flue gas evaporating plant, which comprises a horizontal section, a vertical section and a fluidization section positioned right below the vertical section, wherein the horizontal section and the vertical section are arranged in an L shape and are communicated with each other; the horizontal section is communicated with an inlet fluewhich is communicated with an air pre-heater; the vertical section is communicated with an outlet flue which is communicated with a dust remover; a desulphurization wastewater atomizer is arranged inthe horizontal section; the atomizer is communicated with a connecting pipeline for wastewater to flow in; the upper part of the fluidization section is communicated with the vertical section througha distributing plate; and the lower part of the fluidization section is communicated with a pipeline communicated with compressed air. The L-shaped desulphurization wastewater flue gas evaporating plant makes full use of the height difference between the air pre-heater outlet and a dust remover inlet to combine the spraying of the horizontal section, the evaporation of the vertical section and the secondary entrainment evaporation of the fluidization section, so that wastewater droplets with larger diameter can be completely evaporated in a shorter connecting flue, and the investment cost andthe operation consumption are reduced.

Description

technical field [0001] The invention relates to a flue gas evaporation device for desulfurization wastewater, in particular to a device for evaporating limestone-gypsum wet-process flue gas desulfurization wastewater by using the residual heat of the flue gas after the air preheater of a power station boiler. Background technique [0002] As my country's environmental protection continues to increase, most coal-fired power plant boilers are equipped with flue gas desulfurization devices. Among them, the limestone-gypsum wet flue gas desulfurization process has been widely used at home and abroad due to its mature and reliable technology, wide sources of limestone and easy availability, accounting for about 90% of the installed desulfurization capacity. Since the fuel used in power plant boilers is mainly coal, during the process of washing the flue gas with limestone gypsum slurry, the gaseous pollutants and fly ash in the flue gas are washed into the gypsum slurry, and the ...

AI Technical Summary

Problems solved by technology

However, the temperature at the outlet of the air preheater in the power station is generally not high (usually about 130°C), and the water content of the wastewater is relatively high (usually about 95%). To achieve effective evaporation treatment of wastewater, a larger gas-liquid Contact area and residence time; on the other hand, the space between the air preheater and the dust collector is small. To achieve the above purpose in such a narrow space, it is necessary to artificially extend the length of the originally connected flue, or increase the atomization The consumption of compressed air to reduce the size of droplets and other methods to increase the residence time of droplets increases investment and operating costs

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