Denitration system and denitration processing method of plasma synergistic catalyst

Abstract

The invention provides a denitration system and denitration processing method of a plasma synergistic catalyst. The system includes a gas mixing system, a plasma reaction system, a fixed-bed catalytic reactor, an absorbing device, and an induced draft device, which are connected in sequence. The method comprises: introducing mixed to-be-processed flue gas and ammonia gas into a plasma reactor, performing streamer discharge under the action of high voltage to generate active substances, such as electrons, ions, and free radicals, and performing primary denitration; mixing the flue gas subjected to primary denitration with ammonia gas under the catalytic action of a catalyst, and reacting NOx in flue gas with ammonia gas to achieve denitration; and discharging tail gas after absorption. A synergistic effect between streamer discharge plasma and the low-temperature catalyst is utilized to remove nitric oxide from flue gas at a low temperature with low energy consumption. The inhibition of oxygen on nitric oxide removal is overcome, low-dust arrangement or tail arrangement of an SCR device is realized, and the life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a denitrification system and a treatment method thereof with a plasma co-catalyst, in particular to a denitrification system using a streamer discharge plasma co-catalyst and a treatment method thereof. Background technique [0002] Nitrogen oxides are a common pollutant in the atmosphere, which has a great impact on the environment, including the formation of smog, acid rain, photochemical smog, and the destruction of the ozone layer. Industry (especially coal-fired power plants) emits the vast majority of NOx emissions. At present, the widely used flue gas denitrification technology at home and abroad is selective catalytic reduction (SCR), which generally uses vanadium-titanium catalysts. High-dust arrangements are generally adopted, and the SCR device is placed before the electrostatic precipitator, so that the washing of a large amount of fly ash and dust in ...

AI Technical Summary

Problems solved by technology

[0004] In view of the technical problem of high energy consumption of low-temperature plasma discharge in the prior art, and the shortcomings of the current high-dust arrangement of commercial SCR catalysts that easily lead to catalyst clogging and deactivation, ...

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