Flue gas purifying system and method with integration of desulfurization and denitrification

A flue gas purification system, desulfurization and denitrification technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as incomplete oxidation, and achieve enhanced liquid-phase oxidation effect, simple process, and enhanced oxidation effect. Effect

Active Publication Date: 2014-09-24
SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide an integrated desulfurization and denitrification flue gas purification system and flue gas purification method, which can fully oxidize the nitrogen oxides and sulfur oxides in the flue gas, and effectively solve the problem of incomplete oxidation

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  • Flue gas purifying system and method with integration of desulfurization and denitrification
  • Flue gas purifying system and method with integration of desulfurization and denitrification
  • Flue gas purifying system and method with integration of desulfurization and denitrification

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Embodiment Construction

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

[0052] In smelting, sintering machines, coal-fired boilers, chemical industry and other flue gas treatment technology fields, the pollutants in the flue gas are mainly NO and SO 2 , in the present invention, the use of ozone gas-liquid phase oxidation of NO and SO 2 The reaction mechanism is as follows:

[0053] NO+O 3 →NO 2 +O 2

[0054] NO 2 +O 3 →NO 3 +O 2

[0055]

[0056] SO 2 ·H 2 O(aq)+O 3 →H 2 SO 4 +O 2

[0057]

[0058] In Embodiment 1 of the present invention, a fl...

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Abstract

The invention provides a flue gas purifying system with integration of desulfurization and denitrification. The flue gas purifying system comprises an ozone generator, a washing absorption tower and a chimney, wherein the washing absorption tower comprises a demisting layer, spraying layers and a tower kettle which are sequentially arranged from top to bottom; the tower kettle is externally provided with a circulation pump; the ozone generator is communicated with a flue gas inlet of the washing absorption tower by a first pipeline, so that flue gas is mixed with ozone before entering the washing absorption tower; the ozone generator is communicated with the spraying layers by a second pipeline, and guides ozone into spraying pipelines, so that ozone is mixed with an absorption liquid, and then is sprayed out from the spraying layers; the tower kettle is communicated with the spraying layers by the circulation pumps; a purified flue gas outlet of the washing absorption tower is communicated with the chimney. According to the invention, the process is simple; the occupied area is small; the cost of investment is low; the absorption effect is improved by combining ozone gas phase and liquid phase oxidation; the desulfurization and denitrification rate of the system is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment in smelting, sintering machines, coal-fired boilers, chemical industry, etc., in particular to a flue gas purification system and flue gas purification method integrating desulfurization and denitrification. Background technique [0002] The new standards for the emission of air pollutants from thermal power plants have significantly tightened the emission limits of nitrogen oxides, sulfur dioxide, and soot, and formulated stricter special emission limits for air pollutants for key environments and environmentally sensitive areas, and added mercury and Emission limits for gas-fired boilers. [0003] With the increasingly stringent pollutant control standards, it is necessary to remove multiple pollutants at the same time. However, if multiple pollutants are removed separately, multiple sets of equipment need to be introduced, and problems such as huge investment and large area are faced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/60
Inventor 傅月梅翁淑容潘敏李卫卫刘强张九杉
Owner SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCI & TECH
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