Dry-process smoke denitration method

Abstract

The invention discloses a dry-process smoke denitration method. The method comprises the following steps: (1) a pre-dusting step, namely carrying out pre-dusting on smoke to be treated so as to removemost part of dust particles, thus forming smoke to be denitrated; (2) an oxidization step, namely oxidizing nitric oxide in the smoke to be denitrated into nitrogen dioxide in a catalyst bed device by adopting a denitration catalyst so as to form oxidized smoke, wherein the denitration smoke contains a carrier and an active ingredient, the carrier is nano-scale amphoteric oxide and is selected from one or more of TiO2, ZrO2 or HfO2, and the active ingredient includes CoO, Co2O3, Fe@O3, MnO2 and KMnO4; and (3) an absorption step, namely carrying out dry-process denitration on oxidized smoke inan absorption device by adopting a denitration agent taking magnesium oxide as the main ingredient, thus forming treated smoke. According to the method disclosed by the method, the denitration efficiency is high, the process flow is simple, the water consumption is few, and the investment and running cost are lower.

Description

technical field [0001] The invention relates to a method for dry flue gas denitrification, in particular to a catalyst-based dry flue gas denitrification method. Background technique [0002] In recent years, the problem of air pollution has become increasingly serious. With the increasing demand for energy, the pollution caused by flue gas emissions has become increasingly prominent, and the problem of air pollution control has attracted great attention from people all over the world. The development of efficient, energy-saving, and cost-effective flue gas purification methods can fundamentally solve the different demands of development and environmental protection, as well as current and long-term needs. [0003] As far as flue gas denitrification technology is concerned, at present, domestically, it is mainly aimed at low NOx in the combustion process. x Produced while extensively researched, through a variety of low NO x technology to design a variety of low NO x bur...

AI Technical Summary

Problems solved by technology

Although this oxidative denitrification method can achieve the purpose of removing nitrogen oxides, the O 3 In an environment with a smoke temperature exceeding 130°C and a dust content of 50-200mg / Nm 3 Under the flue gas conditions, it is easy to decompose and absorb dust to lose its activity, resulting in a decrease in denitrification efficiency

In addition, O 3 Excessive consumption increases the operating cost of the denitrification system

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