Wet process corona desulfurization, denitrification and dust removal smoke gas purification device and use method

Abstract

The invention relates to a wet process corona desulfurization, denitrification and dust removal smoke gas purification device and a use method. The device comprises a machine case, wherein a smoke gas purification gas passage is arranged in the machine case in the forward and backward direction; a plurality of anode plates are arranged in the smoke gas purification gas passage in parallel; the upper part of each anode plate is provided with an anode spraying pipe in the forward and backward direction; a water outlet of each anode spraying pipe faces to the corresponding anode plate respectively; a cathode is arranged at one side of the anode plate; a gas filtering anode plate with the plate surface in which gas flow can pass through is arranged in the smoke gas purification gas passage and is positioned behind the plurality of anode plates; the plate surface of the gas filtering anode plate is arranged along the cross section direction of the smoke gas purification gas passage; a gas filtering anode plate spraying pipe is arranged above the gas filtering anode plate along the cross section direction of the smoke gas purification gas passage. The invention aims at providing the wet process corona desulfurization, denitrification and dust removal smoke gas purification device and the use method with the advantages that the gas treatment quantity in unit time is great; the effect for removing oxynitride, sulfur dioxide, sulfur trioxide and tiny dust including PM2.5 (Particulate Matter2.5) is very obvious; the desulfurization, denitrification and dust removal performance is very stable.

Description

technical field [0001] The invention relates to a wet corona desulfurization, denitrification and dust removal flue gas purification device and a use method. Background technique [0002] The flue gas of coal-fired boilers contains a large amount of nitrogen oxides, sulfur dioxide, sulfur trioxide and fine dust including PM2.5. If it is discharged directly, it will seriously pollute the surrounding environment. Therefore, it needs to be treated. The existing removal of nitrogen oxides, sulfur dioxide, sulfur trioxide and fine dust including PM2.5 in the flue gas is carried out separately, and usually 3-5 sets of electrostatic precipitators are used in series to provide dust removal for power plant boilers , while desulfurization and denitrification use special desulfurization and denitrification devices, but due to various reasons, the existing electrostatic precipitator cannot meet the design requirements for removing very fine dust in large-flow gas, and the amount of dust...

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Problems solved by technology

The existing removal of nitrogen oxides, sulfur dioxide, sulfur trioxide and fine dust including PM2.5 in the flue gas is carried out separately, and usually 3-5 sets of electrostatic precipitators are used in series to provide dust removal for power plant boilers , while desulfurization and denitrification use special desulfurization and denitrification devices, but due to various reasons, the existing electrostatic precipitator cannot meet the design requirements for removing very fine dust in large-flow gas, and the amount of dust in the discharged flue gas Generally more than 70 mg / m3, most of the dust discharged belongs to the particulate matter that can enter the lungs

At the same time, the residual nitrogen oxides, sulfur dioxide, and sulfur trioxide in the treated flue gas are still high, which makes it difficult for a large number of power generation boilers in my country to meet the new environmental protection standards for power plant boiler smoke exhaust.

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