Method and device for purifying nitric oxide and fog particles in wet desulphurization aerial fog by low-temperature plasma

Abstract

The invention discloses a method and device for purifying nitric oxide and fog particles in wet desulphurization aerial fog by low-temperature plasma. The method comprises the steps of introducing the wet flue gas desulphurization aerial fog into a purification device, and oxidizing nitric oxide in the aerial fog into nitrogen dioxide with strong hydrophilia by the low-temperature plasma generated by high voltage discharge; furthermore, catching the fog particles in the aerial fog, which are charged and directionally move onto an electrode liquid film under high voltage discharge; and prompting the airflow to move towards an electrode by the inductive effect of moving particles in the electric field, and contacting nitrogen dioxide with the electrode liquid film so that nitrogen dioxide is absorbed and removed. Due to the oxidation of the low-temperature plasma and the directional movement of the airflow and the charged particles under the action of electric field force, gaseous mercury, sulfur trioxide sol, smoke and the like in the aerial fog can be removed. The method and the device realize the purpose that multiple pollutants in the wet desulphurization aerial fog are removed at the same time, namely, the multiple pollutants can be removed in a reactor, so that the investment and the operating cost of flue gas treatment can be greatly reduced.

Description

technical field [0001] The invention relates to a method and a device for purifying nitrogen oxides and mist particles in wet desulfurization gas mist, belonging to the technical field of environmental protection. More specifically, it relates to a method and device for purifying nitrogen oxides and mist particles in wet desulfurization gas mist by utilizing the oxidation of low-temperature plasma, the directional movement of airflow induced by moving particles, and the absorption of mist particles and electrode liquid film. Background technique [0002] As we all know, coal accounts for about 70% of my country's primary energy consumption, and coal-fired flue gas SO 2 and NO x (x=1,2) is the main cause of serious air pollution. In order to control coal-burning pollution, our country first focused on thermal power boilers, and then extended to industrial boilers and kilns, and carried out flue gas desulfurization and denitrification work. The mainstream technology is sele...

AI Technical Summary

Problems solved by technology

The traditional wet electrostatic demisting technology is based on negative high-voltage discharge to generate high-energy electrons. The main purpose is to separate fog particles. The high-energy electron chemical effect generated by this discharge method is weak and cannot efficiently oxidize NO, so the denitrification efficiency is not high.

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