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Dry-stack gas desulful-izing method using position regulatable water sprag atomization method

A technology of dry flue gas desulfurization and desulfurization agent, which is applied in chemical instruments and methods, separation methods, and separation of dispersed particles. Rate and desulfurization efficiency and other issues

Inactive Publication Date: 2004-07-21
WUHAN KAIDI ELECTRIC POWER CO LTD
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Problems solved by technology

The water spray atomization technology in Chinese Patent Publication No. CN1401415A adopts a fixed pressure water spray atomization nozzle, but the fixed water spray atomization nozzle is relatively adjustable for the flue gas load change of the desulfurization tower. Poor, it is difficult to adapt to the flue gas load change that is often encountered in the current dry flue gas desulfurization, which makes the control of water spray in the desulfurization tower relatively rough, which greatly affects the utilization rate and desulfurization efficiency of the desulfurization agent

Method used

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  • Dry-stack gas desulful-izing method using position regulatable water sprag atomization method
  • Dry-stack gas desulful-izing method using position regulatable water sprag atomization method
  • Dry-stack gas desulful-izing method using position regulatable water sprag atomization method

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Embodiment Construction

[0024] In the present invention, the untreated flue gas from boilers or other combustion equipment is first passed through different forms of particle separators (such as cyclone separators, louver type inertial separators, electrostatic precipitators, bag dust collectors, etc., such separators or used alone or in combination) for pre-dust removal, and then the flue gas with reduced soot concentration is sprayed into the desulfurization reaction tower where the slaked lime Ca(OH)2 generated after being fully digested by the digestion reaction tower is used as a desulfurization agent, in the desulfurization reaction The middle and lower part of the tower adopts the position-adjustable water spray atomization method, so that the SO2 in the flue gas and the slaked lime Ca(OH)2 react in the desulfurization tower to form solid calcium sulfite and calcium sulfate, and then discharge the desulfurization system, along with the desulfurization tower Part of the incompletely reacted desu...

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Abstract

A fume desulfurizing process by dry method and using the position-adjustable water spraying and atomizing includes preparing and digesting the desulfurizing agent, internal desulfurizing reaction in tower, and external separation and recirculation of granular desulfurizing agent. It features that the water is sprayed into desulfurizing and digesting towers in such manner that its nozzle position can be adjusted in a certain range.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, in particular to a dry flue gas desulfurization method using position-adjustable water spray atomization. Background technique [0002] At present, the treatment of sulfur dioxide generally adopts the wet lime-gypsum method (W-FGD) in foreign countries. Although the above-mentioned method has a good removal effect, it has huge investment, large water consumption, large floor area, complex system, There are a series of problems such as large resistance, complex structure, and the need to reprocess water. Therefore, dry or semi-dry high-efficiency flue gas desulfurization technology has become the focus of research and development at home and abroad. [0003] For dry (semi-dry) desulfurization technology, the main factors affecting desulfurization efficiency are reaction temperature, humidity, surface activity of desulfurizer particles, contact reaction tim...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/83
Inventor 林冲张泽张颉李雄浩刘亚丽胡永锋
Owner WUHAN KAIDI ELECTRIC POWER CO LTD
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