Rotary flue spray combined in-tower spray desulfurization and dust removal integrated system for thermal power plant

Abstract

The invention relates to a rotary flue spray combined in-tower spray desulfurization and dust removal integrated system for a thermal power plant. The rotary flue spray combined in-tower spray desulfurization and dust removal integrated system comprises a desulfurization absorption tower; a desulfurization absorption tower oxidation slurry tank is arranged at the bottom of the desulfurization absorption tower; a smoke inlet is formed in the side wall of the desulfurization absorption tower; the smoke inlet is connected with an absorption tower inlet flue; a plurality of mechanical efficient atomizing nozzles are arranged in the absorption tower inlet flue and the desulfurization absorption tower; the mechanical efficient atomizing nozzles are connected with the desulfurization absorption tower oxidation slurry tank through a spray slurry circulating pump; a flue flushing system is arranged at the bottom of the absorption tower inlet flue; a lateral rotary atomization spraying layer isarranged above the smoke inlet of the absorption tower inlet flue, a vertical atomization spraying layer is arranged above the lateral rotary atomization spraying layer, a centrifugal efficient dust and mist removal device is arranged at the upper part of the vertical atomization spraying layer, and the spray slurry circulating pump is connected with a slurry supplementing pipeline for conveying limestone fresh slurry. The rotary flue spray combined in-tower spray desulfurization and dust removal integrated system has the advantages of high desulfurization efficiency, high dust removal efficiency, small occupied area, investment saving, low operation energy consumption, simple system and stable operation.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, dust removal and purification in thermal power plants, in particular to an integrated system for thermal power plant rotary flue spraying combined with spraying, desulfurization and dust removal in towers. Background technique [0002] With the increasingly stringent environmental protection requirements, the pollutant emission standards of coal-fired power plants have been raised again and again. At present, thermal power plants across the country require that the emission of flue gas pollutants meet ultra-low emission standards. [0003] At present, in the ultra-low emission transformation of power plants, the desulfurization efficiency needs to reach more than 99%, and the dust removal efficiency needs to reach 99.99%. Circulation, double-tower double-circulation, newly added airflow uniform distribution device in the absorption tower, new wet electrostatic precipitator behind...

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Problems solved by technology

[0003] At present, in the ultra-low emission transformation of power plants, the desulfurization efficiency needs to reach more than 99%, and the dust removal efficiency needs to reach 99.99%. Circulation, double-tower double-circulation, newly added airflow uniform distribution device in the absorption tower, new wet electrostatic precipitator behind the tower and other transformation methods, these methods occupy a large area, the transformation is difficult, the transformation project is large, the investment is high, and the transformation is completed High energy consumption and complex system after operation, which is not conducive to stable operation of the system

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