Corona wet desulfurization and denitrification dust removal flue gas purification device and using method thereof

Abstract

The invention discloses a corona wet desulfurization and denitrification dust removal flue gas purification device and a using method thereof. The device comprises an enclosure, wherein a flue gas purification duct is formed in the enclosure along the forward and backward direction; multiple anode plates are arranged in parallel in the flue gas purification duct; an anode spray pipe is arranged above each anode plate along the forward and backward direction; a water outlet of each anode spray pipe faces a corresponding anode plate; a cathode is arranged on one side of each anode plate; an air filtering anode plate through the plate surface of which airflow can pass is arranged in the flue gas purification duct and positioned in the rear of the multiple anode plates; the plate surface of the air filtering anode plate is arranged along a section direction of the flue gas purification duct; and an air filtering anode plate spray pipe is arranged above the air filtering anode plate along the section direction of the flue gas purification duct. The invention aims to provide a corona wet desulfurization and denitrification dust removal flue gas purification device which is large in amount of treated gases in unit time, outstanding in effect of removing nitric oxides, sulfur dioxide, sulfur trioxide and fine dust including PM2.5 and extremely stable in desulfurization, denitrification and dust removal performances, and a using method of the device.

Description

technical field [0001] The invention relates to a corona wet method 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 ...

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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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