A simultaneous desulfurization, denitrification and mercury removal device

Abstract

The invention discloses a simultaneous desulfation, denitration and mercury removal device, relating to mercury removal devices for flue gases of coal-fired power plants. The device is provided with a simulated flue gas generating unit, a plasma oxidation unit, an activated carbon adsorption unit and a flue gas ingredient detection unit, wherein pipes of the simulated flue gas generating unit, the plasma oxidation unit, the activated carbon adsorption unit and the flue gas ingredient detection unit are connected through rotary valves and Y-shaped three-way joints; the simulated flue gas generating unit is provided with a N2 cylinder, a CO2 cylinder, a SO2 cylinder, an O2 cylinder, a NO2 cylinder, a HCl cylinder, a NO cylinder, a mass flow controller, a Hg0 permeation tube and a thermostatic water bath; a gas washing bottle is arranged in the thermostatic water bath; the plasma oxidation unit is provided with a high-voltage power supply and a plasma reactor; the plasma reactor is provided with a quartz dual-dielectric layer; the activated carbon adsorption unit is provided with a thermostatic baking box and an adsorption reactor; and the detection unit is provided with a flue gas analysis unit and a Hg0 analysis unit.

Description

technical field [0001] The invention relates to a mercury removal device for flue gas of a coal-fired power plant, in particular to a simultaneous desulfurization, denitrification and mercury removal device. Background technique [0002] NO x Emissions will cause serious harm to the natural environment and human production and activities, including toxic effects on the human body, damage to plants, formation of acid rain or acid fog, formation of photochemical smog with hydrocarbons, and destruction of the ozone layer. my country's coal-based energy structure has resulted in high total nitrogen oxide emissions, regional air pollution is becoming more and more obvious, and the type of acid rain has changed from sulfuric acid to sulfuric acid and nitric acid. According to statistics, in 1995, the national nitrogen oxide emissions were about 10.9 million tons. In 2000, the total national nitrogen oxide emissions reached about 12 million tons. In 2004, it increased to 18.6 mill...

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Problems solved by technology

In the literature ([10] Juyoung Jeong, Jongsoo Juring. Removal of gaseous elemental mercury by dielectric barrier discharge [J]. Chemosphere68 (2007) 2007-2010; [11] Lin Wenfeng, Zhang Bin, Hou Wenhui, Zhou Qiang, Yang Hongmin. Low temperature plasma Characteristic Analysis of Promoting Elemental Mercury Oxidation in Flue Gas [J]. Chinese Journal of Electrical Engineering, 2010, 30(2); [12] Du Boxue, Liu Hongjing, Wang Kefeng, Wang Xinhui. Experimental Study on Removal of NOx by Low-temperature Plasma Generated by Dielectric Barrier Discharge[ J]. High Voltage Technology, 2009, 35(9); [13] Bai Xiyao, Yi Chengwu, Zhang Zhitao, etc. Decomposition of harmful gases SO2 and NO by low temperature and atmospheric pressure plasma [J]. Environmental Science, 1993, 14( 1):37-40) Most of the plasmas used are only used for the oxidation of nitrogen oxides, sulfur oxides or Hg0 alone. There is no report on the oxidation efficiency of the three at the same time in the plasma reactor, and there is no oxidation product to process

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