Double-tower plasma-coupled sodium-based absorption flue gas deep purification device and method

A technology of deep purification of flue gas and plasma, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, and can solve problems such as the inability to effectively remove elemental mercury

Active Publication Date: 2017-04-12
江苏富春江环保热电有限公司
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Problems solved by technology

In addition, although wet desulfurization can remove part of oxidized mercury, the large proportion of elemental mercury in the flue gas cannot be effectively removed. Therefore, the current mercury removal technology must be upgraded to adapt to the increasingly Strict emission standard of flue gas Hg

Method used

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  • Double-tower plasma-coupled sodium-based absorption flue gas deep purification device and method
  • Double-tower plasma-coupled sodium-based absorption flue gas deep purification device and method
  • Double-tower plasma-coupled sodium-based absorption flue gas deep purification device and method

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Embodiment 1

[0066] Embodiment 1, figure 1 A double-tower plasma-coupled sodium-based absorption flue gas deep purification device and method is given, including a desulfurization tower 1, a plasma demisting and oxidation device 2, and a denitrification and demercuration tower 3.

[0067] The present invention adopts the setting that the desulfurization tower 1 and the denitrification and mercury removal tower 3 are separated from each other; the mode of this separation setting firstly reduces the mutual competition between desulfurization and denitrification, and improves the desulfurization effect; secondly, after desulfurization, NOx and Hg are oxidized out, and there is help to improve the oxidation efficiency; finally according to the SO 2, NOx and Hg chemical characteristics, and carry out the targeted design of the absorption tower.

[0068] The desulfurization tower 1 includes a desulfurization slurry circulation pool 11 , a desulfurization flue gas inlet 12 , a desulfurization sp...

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Abstract

The invention discloses a twin-tower type flue gas deep purification device through plasma coupling and sodium based absorption. The desulfurization tower and denitration tower in the device are separated from each other. The desulfurization tower comprises a desulfurization slurry circulating tank, a desulfurization spraying layer, a desulfurization demister, and a desulfurization flue gas outlet from bottom to top. A plasma demisting and oxidizing device comprises a demisting part and an oxidizing part, and the lower ends of the demisting part and the oxidizing part are both provided with a demisting wastewater outlet. The denitration and demercuration tower comprises a denitration and demercuration slurry circulating tank, a filling material layer, a denitration and demercuration spraying device, a denitration and demercuration demister, and a denitration and demercuration flue gas outlet from bottom to top. A desulfurization flue gas outlet is arranged between the desulfurization slurry circulating tank and the desulfurization spraying layer. The denitration and demercuration slurry circulating tank is connected to the oxidizing part. The demisting part is connected to the desulfurization flue gas outlet. The desulfurization slurry circulating tank is connected to the desulfurization spraying layer. The denitration and demercuration slurry circulating tank is connected to the denitration and demercuration spraying device. The desulfurization slurry circulating tank and the demisting wastewater outlet are both connected to the denitration and demercuration slurry circulating tank.

Description

technical field [0001] The invention relates to a flue gas treatment reactor of a coal-fired boiler, in particular to a double-tower plasma-coupled sodium-based absorption flue gas deep purification device and method. Background technique [0002] my country is a big coal-producing country and a big coal-burning country, and the proportion of coal in my country's primary energy is as high as 65%. The flue gas emitted by coal combustion contains a large amount of air pollutants, such as: SO 2 , NOx and Hg, etc., have caused serious harm to the atmospheric environment and human health. At present, the SO produced by coal burning in my country 2 NOx and NOx emissions were as high as 20.7 million tons (2014) and 16.43 million tons (2007), accounting for 90% and 70% of the country's total emissions. [0003] SO 2 and NO x The main hazards of these pollutants are causing acid rain and the destruction of the ozone layer, causing great harm to the ecological environment and hum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/50B01D53/56B01D53/64F23J15/02
Inventor 吴祖良盛洪产楼军金孝祥吕科伟徐少娟林孝鑫
Owner 江苏富春江环保热电有限公司
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