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

A technology of sulfur dioxide and nitrogen oxides, applied in the fields of plasma chemistry and environmental engineering, to achieve the effects of reducing equipment, reducing equipment investment and operating costs, and shortening the process

Inactive Publication Date: 2009-01-07
DALIAN MARITIME UNIVERSITY
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  • Abstract
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  • Application Information

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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 denitrificatio

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

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0024] The technological process of the ozone oxidation dry process for simultaneous removal of sulfur dioxide and nitrogen oxides in flue gas is shown in the attached figure. The high-temperature flue gas 1 containing sulfur dioxide, nitrogen oxides and soot is transported into the electrostatic precipitator 2 . The flue gas 1 dust removal system is composed of an electrostatic precipitator 2 and a DC negative high-voltage power supply 3. The DC high-voltage power supply 3 outputs a negative high voltage (40-160kV) and is applied to the corona electrode of the electrostatic precipitator 2 to form an electric field with a strength of 10-100kV. The electrostatic electric field of 40kV / cm traps the saturated charged smoke and dust on the dust collecting plate of the electrostatic precipitator, and collects the smoke and dust after vib...

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/60B01D53/76
CPCY02A50/20
Inventor 白敏菂张芝涛白敏冬杨波薛晓红白希尧
Owner DALIAN MARITIME UNIVERSITY
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