Novel dual-alkali flue gas desulfurization method and flue gas desulfurization system

A technology of desulfurization system and double-alkali method, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of long running time and failure of double-alkali method, achieve long running time, improve absorption efficiency, and reduce costs Effect

Inactive Publication Date: 2016-04-20
刘安明
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the deficiencies of the existing technology, the present invention discloses a novel dual-alkali flue gas desulfurization method and flue gas desulfurization system, which solves the failure problem of the traditional dual-alkali method, and the system has long running time, low investment cost and good desulfurization effect. Magnesium double-alkali flue gas desulfurization system, the desulfurization efficiency reaches more than 97%

Method used

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  • Novel dual-alkali flue gas desulfurization method and flue gas desulfurization system
  • Novel dual-alkali flue gas desulfurization method and flue gas desulfurization system
  • Novel dual-alkali flue gas desulfurization method and flue gas desulfurization system

Examples

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Embodiment 1

[0029] see figure 1 and figure 2 , a new double-alkali flue gas desulfurization system, including a desulfurization tower, a chimney, a regeneration tank, a magnesium oxide dissolution tank, an alkali solution tank, a solid-liquid separator, a clear liquid tank and a desulfurization product treatment system, and the flue gas outlet of the desulfurization tower It is connected with the chimney, the liquid outlet of the desulfurization tower is connected with the liquid inlet of the regeneration tank through a pipeline, the liquid outlet of the magnesium oxide dissolving tank is connected with the liquid inlet of the regeneration tank through a pipeline, and the outlet of the regeneration tank is connected with the pipeline. The liquid port is connected to the liquid inlet of the solid-liquid separator through a pipeline, the liquid outlet of the solid-liquid separator is connected to the inlet of the clear liquid tank through a pipeline, and the clear liquid outlet of the cle...

Embodiment 2

[0037] see figure 1 and figure 2 , a new dual-alkali flue gas desulfurization system, including a single-tower desulfurization tower, a chimney, a regeneration tank, a magnesium oxide dissolution tank, an alkali solution tank, a solid-liquid separator, a clear liquid tank and a desulfurization product treatment system, and a single-tower desulfurization tower The flue gas outlet is connected to the chimney, the liquid outlet of the single-tower desulfurization tower is connected to the liquid inlet of the regeneration tank through pipelines, the liquid outlet of the magnesium oxide dissolution tank is connected to the liquid inlet of the regeneration tank through pipelines, The liquid outlet of the regeneration tank is connected with the liquid inlet of the solid-liquid separator through a pipeline, the liquid outlet of the solid-liquid separator is connected with the inlet of the clear liquid tank through a pipeline, and the clear liquid outlet of the clear liquid tank is c...

Embodiment 3

[0045] In this example, the new sodium-magnesium double-alkali flue gas desulfurization system is used for desulfurization. The desulfurization tower is a double-tower desulfurization tower. emissions, such as image 3 shown.

[0046] Including primary desulfurization tower, secondary desulfurization tower, chimney, regeneration tank, magnesium oxide dissolving tank, lye tank, solid-liquid separator and desulfurization product treatment system, the inlet of the secondary desulfurization tower is connected with the outlet of the primary desulfurization tower through pipelines , the outlet of the secondary absorption tower is connected to the discharge chimney, the liquid outlet of the primary desulfurization tower is connected to the liquid inlet of the regeneration tank through pipelines, the liquid outlet of the magnesium oxide dissolution tank is connected to the liquid inlet of the regeneration tank through pipelines The liquid outlet of the regeneration tank is connected ...

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Abstract

The invention provides a novel dual-alkali flue gas desulfurization method and flue gas desulfurization system, and relates to the technical field of flue gas purification. The method comprises the following steps of absorbing SO2 in flue gas to generate an absorption solution containing sodium sulfite and sodium bisulfite by taking sodium hydroxide or sodium carbonate as an absorbent, enabling the absorption solution to enter a regenerated reactor, regenerating the absorption solution in the regenerated reactor by using magnesium oxide or magnesium hydroxide, performing precipitation separation by virtue of a solid-liquid separator, enabling sodium sulfite or sodium hydroxide formed by regeneration to return to a desulfurization tower for flue gas absorption for recycling, enabling magnesium sulfite precipitates obtained by solid-liquid separation to enter a desulfurization product treatment system, and directly discharging magnesium sulfite or preparing magnesium sulfate. According to the method and the system, a sodium and magnesium dual-alkali method is adopted for flue gas desulfurization, so that a good desulfurization effect is achieved, oxidation is not required by the system, accumulation of sodium sulfate is avoided, and the system can run for a long time; moreover, the materials in the system can be regenerated and recycled, therefore alkali consumption is reduced, and the cost is reduced.

Description

technical field [0001] The present invention relates to the fields of chemical production and environmental protection, to the technical field of flue gas purification, to desulfurization devices and auxiliary equipment used in desulfurization, and in particular to a novel double-alkali flue gas desulfurization system, in particular to a novel double-alkali flue gas desulfurization system. Gas desulfurization method and flue gas desulfurization system. Background technique [0002] The sulfur dioxide contained in the flue gas will cause very serious pollution to the atmospheric environment, seriously destroy the ecological balance, and cause great harm to the health of animals, plants and humans. Acid rain will also occur to a large extent, which will damage the building Corrosion and destruction of objects seriously affect the ecological environment and living environment. Therefore, in order to effectively reduce the hazards of sulfur dioxide, relevant departments continu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/96
CPCB01D53/501B01D53/96B01D2251/304B01D2258/0283
Inventor 黄伟刘安明吴新民
Owner 刘安明
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