Resource ozone oxidation dry method capable of removing sulfur dioxide and nitrogen oxides in flue gas

Abstract

The invention belongs to the application technical field, such as gas ionization discharge, plasma chemistry and environment engineering, and relates to a method for reutilizing fume while removing sulfur dioxide and nitrogen oxides by adopting the ozone oxidation method. The method comprises the following steps: ozone gas with a concentration of 40 to 240 g / Nm<3> is fed into a reactor or a flue together with fume at 65 DEG C to 250 DEG C with a smoke dust concentration lower than 40 mg / Nm<3>; the ozone simultaneously oxidizes sulfur dioxide, nitrogen oxides and water in the fume and generates micro-fog drops which are collected into a mixed acid solution after being electrically coagulated; and the mixed acid solution is separated and purified into the sulfuric acid and the nitric acid by adopting a chemical method. The method has the advantages that during the process for simultaneously removing the sulfur dioxide and the nitrogen oxides in the fume, no catalyst is used, no absorbent is added, no byproduct is generated, and no any adverse effect on the environment is generated, and provides a reutilization method for the desulfurization and the denitrification of the fume from coal burning.

Description

technical field [0001] The invention belongs to the technical fields of gas ionization discharge, plasma chemistry, environmental engineering and the like, and relates to an ozone oxidation dry method for resource utilization and simultaneous removal of sulfur dioxide and nitrogen oxides. technical background [0002] In 2007, Zhejiang University and the State Key Laboratory of Clean Energy Utilization conducted a simultaneous removal of NO from boiler flue gas using ozone oxidation technology. x and SO 2 Experimental research, they used multi-layer quartz tube plug flow reactor structure is composed of preheating section, reaction section, cooling section. The reactor has a three-layer pipe structure with an outer diameter of 22mm. The reaction gas is sent to different preheating sections through two channels. After preheating in the central tube, it directly enters the central reaction section; the flue gas and ozone gas are quickly mixed at the entrance of the reaction...

AI Technical Summary

Problems solved by technology

The invention solves the technical problem of dry flue gas desulfurization and denitrification, realizes a new method of ozone oxidation dry flue gas desulfurization and denitrification without catalyst, absorbent and by-products, without any negative impact on the environment

Provide a resourceful method for desulfurization and denitrification of coal-fired flue gas

Images